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HomeMy WebLinkAbout1995 Diamond Bar General Plan Environmental Impact Report (EIR)i . GENERAL PIAN { ENVIRONMENTALIMPACT REPORT' and PROPERTY OF CITY OF' DIAMOND BAR AD-_D'F,N- DUM'. NUMH3,F_ TO FINAL EIR. I+' 'IJE CITY l�' DfAm0-- ND BAR 1995. GENERAL P1L,A11 APRIL 1995 PURPOSE AND SCOPE OF AII'lf+ENDUM 1 TUM—ru Section 15164 of the California -Enviroiitnenta-Iduality Act ( ) utdel es states the following: t "(a) The lead agency or responsible aged; y s1Fall f kadde adunf to a previously certified EIR if sotno. ch ages Q'I'addicessary." but none of the conditionsdcecribdi in :&ction 15161.6a1.ing =.fol preparation of a subsequcrit EIR have~ 'c; m' �s ; (b) An addendum to. an adopteddeclma' don tnay, be-��apared 1€ a.y minor technical changes .or adc�it�ons. are neves Y ; (c) An addendum need not be circuli#ed for t ub)ic it �'but= epi be included in or attached to the - final ElR acI€�pi negativ ., . declaration. , (d) The decision-making body sh,941t. consider ch -6 acl6ndu<f —with the final EIR or adopted negative. declardtfo-11.prior final fig a4&ision on the project. (e) A brief explanation of thedecsi.o roi ¢=prop a sh�9e'uehl .EIR pursuant to Section 15162. shoul(J. be'gnelu&d tn- ri adi endurri W=an EIR, the lead agency's required- fiiad ngs -ari l e'pr6ject, orFelseWhore in the record. The explanation must be supported by substantial evidence." Addenchun- Number 2 *to the Diamond ,� �ar Ganem ��hb F:�nal EIlt has;; -beef prepared fi response to modifcations made to the' Genual l #� cdgs dpred af_the titre the. Final EIR was .certified '.Addendum Nurnbet 1, 14_Rl�`waa prc pared ,for the 1993; r version of the Pian, was certif ed:.b the ity €�uheil drz July 27, 1993. Addendum Aiuniber 1. is no- longer a valid doeurned since:1'11�t verswi': of the G r Aral Ply was rescinded. For purposes: of this Addendum (Addbii.d "liiber: 2Plan pLaposal analyzed in the,. 1992 Final EIR and the.proPp "t. 1995! 1995. ut3ez i Plan will be :diseu*d. The planning area addressi�c4 ;in,#h '. ciieral P'la is comprised c f the RESOLUTION NO. 95-20 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF DIAMOND BAR INCORPORATING RESOLUTION NO. 92-43 BY REFERENCE AND CERTIFYING THE ADEQUACY OF THE ADDENDUM TO THE GENERAL PLAN ENVIRONMENTAL IMPACT REPORT AND MAKING FINDINGS THEREON PURSUANT TO THE CALIFORNIA ENVIRONMENTAL QUALITY ACT. A. Recitals. (i) The City of Diamond Bar previously initiated proceedings to adopt a general plan (111992 -General Plan") pursuant to Title 7, Division 1 of the California Government Code Sections 65360 and 65361. (ii) Pursuant to the California Environmental Quality Act of 1970, as amended, and the Guidelines promulgated thereunder ("CEQA"), a Draft and Final Environmental Impact Report was prepared and considered to address the environmental effects of the 1992 General Plan, the mitigation measures related to each significant environmental effect of the 1992 General Plan, the project alternatives and a mitigation monitoring program. (iii) Pursuant to Section 15087 of the California Code of Regulations, a 45 day comment period was provided to all affected agencies for review of the Draft Environmental Impact Report. Written comments were received and were responded to in the "Response to Comments" contained in the Final Environmental Impact Report. (iv) The Planning Commission conducted duly noticed study sessions on July 22, August 12 and August 26, 1991 to consider and receive public testimony with respect to the Draft Environmental Impact Report prepared for the 1992 General Plan. The Planning Commission conducted duly noticed public hearings with respect to the Draft Environmental Impact Report where it received public testimony and duly considered all testimony on September 9 and September 23, 1991 and on April 13, April 20, April 27, May"4, May 11, May 18, May 21, May 26, May 28, June 1 and June 8, 1992. (v) The Planning Commission reviewed all environmental documentation comprising the.Draft Environmental Impact Report and found that the documents considered all environmental effects of the 1992 General Plan, that they were complete and adequate, and that they fully complied with all requirements of CEQA. (vi) On June 8, 1992 the Planning Commission recommended to the City Council that the Draft Environmental Impact Report be certified as complete and adequate. On June 9, June 26, June 30, July 7 and July 14, 1992, the City Council conducted duly noticed public hearings to consider and receive public testimony regarding the Draft and Final Environmental Impact Report. 1 Plan. Further, the mitigation measures contained in the Final Environmental Impact Report which was prepared in connection with the 1992 General Plan remain current and valid and a revised Mitigation Monitoring Program ("Mitigation.Monitoring Program") is hereby made a part of the Final Environmental Impact Report for the 1995 General Plan to ensure implementation of the mitigation measures identified in the Final Environmental Impact Report. (xiv In its review of the 1995 General Plan, the Final Environmental Impact Report and the Addendum, the City Council fully considered the impacts upon landforms and topography, earth resources and seismicity, drainage and flood control, biological resources, crime and prevention services, fire hazards and protective services, health and emergency services, hazardous _materials, recreation and open space, land use, air quality, noise, cultural resources, socioeconomics (housing), energy systems, circulation/transportation, educational services, water, wastewater, and solid waste associated with the further development of the City in -accordance with the goals, policies and programs as more fully detailed in the 1995 General Plan. (xvi)-All legal prerequisites prior to the adoption of this Resolution have occurred. B. Resolution. NOW, THEREFORE, it is hereby found, determined and resolved by the City Council of the City of Diamond Bar, as follows: 1. The City Council of the City of Diamond Bar hereby specifically finds that all of the facts set forth in the Recitals, Part A, of this Resolution are true and correct and are hereby incorporated into the body of this Resolution by reference. 2. The Final Environmental Impact Report, prepared pursuant to CEQA, and certified and adopted in Resolution No. 92- 43 on July 14, 1992, is hereby incorporated herein by this reference as though set forth in full in connection with the 1995 General Plan. The Addendum, prepared pursuant to CEQA, is hereby made a part of the Final Environmental impact Report and is hereby certified and adopted by this City Council in connection with the 1995 General Plan. The environmental findings made in Resolution No. 92-43 and additional environmental findings, attached hereto as Exhibit "A,".ars:hereby incorporated by this reference and adopted. EXHIBIT A 1. The City Council finds that the Final Environmental Impact Report was certified as being completed in compliance with the California Environmental Quality Act of 19701, as amended, and the guidelines promulgated thereunder 'by Resolution 92-43, adopted on July 14, 1992. The Addendum to the Final Environmental Impact Report, prepared in connection with the adoption of the City of Diamond Bar 1995 General Plan, was completed in compliance with the California Environmental Quality Act of 1970, as amended, and the guidelines promulgated thereunder, and is hereby made a part of the Final Environmental Impact Report. The City Council has reviewed and considered the information contained in the Final Environmental Impact Report and Addendum and the Final Environmental Impact Report and Addendum reflect the independent judgment of the City of Diamond Bar. 2. This City Council finds that.the Final Environmental Impact Report and Addendum have identified all significant environmental effects of the 1995 General Plan and that there are no known potential environmental impacts not addressed in the Final Environmental Impact Report and Addendum. This City Council further finds that the Final Environmental Impact Report and Addendum identify significant individual and - cumulative environmental effects of the project in regard to landforms and topography, earth resources and seismicity, drainage and flood control, biological resources, crime and prevention services, fire hazards and protective services, health and emergency services, hazardous materials, recreation and open space, land use, air quality, noise, cultural resources, (95-20) Exhibit A - Page 1 significant unavoidable environmental effects that will result if the 1995 General Plan is adopted, all significant effects that can feasibly be mitigated or avoided have been reduced to the extent feasible by the imposition of mitigation measures contained within the Final Environmental Impact Report and Addendum and the Mitigation Monitoring Program and the social, economic and other benefits of the project outweigh those unavoidable impacts. Therefore, the City Council finds that the unavoidable environmental impacts of the 1995 General Plan are acceptable when balanced against the benefits of the project. 5. This City Council hereby adopts the following Statement of Overriding considerations: (a) The City Council finds that while changes or alterations have been required in, or incorporated into the 1993 General Plan -which substantially lessen the significant environmental effects as identified in the Final Environmental Impact Report and Addendum, these effects cannot be totally avoided or reduced to a level of insignificance if the project is implemented. (b) To the extent that the 1995 Diamond Bar General Plan allows the occurrence of significant effects identified in the Final Environmental impact Report and Addendum which cannot be totally avoided or reduced to a level of insignificance, the City Council has identified specific economic, ecological, and social reasons to support its action which make infeasible the project alternatives described in the Final Environmental Impact Report and Addendum. Although the City Council found in Resolution 9243 that the impacts from implementation of the 1992 General Plan on (95-20) Exhibit A - Page 3 significant natural resources of the city and its sphere of influence and will enhance the protection of visually sensitive areas. (iv) The 1995 General Plan provides greater assurances than the alternatives proposed, including the "no project" alternative, that where development does occur in or adjacent to visually sensitive areas, such development will occur in a manner which minimizes effects upon resources. (v) The 1995 General Plan will assure that geologic and safety considerations influence the preparation of development plans and proposals and requires that such considerations are reflected in each development proposal, including requirements for architecture and site design which are sensitive to the topography and the significant natural resources of the City and its sphere of influence. (vi) The 1995 General Plan will encourage a safe and convenient system of circulation.and access which is responsive to local and regional considerations, and will provide adequate levels of public services, facilities and utilities which areproperlysequenced to ensure that such necessary public services, facilities and utilities are in place in conjunction with development as it occurs in a manner superior to that which would be provided through the other alternatives, including the "no project" alternative. (vii) The 1995 General Plan will promote the establishment of adequate funding mechanisms in order to provide identified infrastructure and circulation improvements which will be required and will be implemented in an equitable (95-20) Exhibit A - Page 5 8. This City Council hereby adopts the Mitigation Monitoring Program required by Public Resources Code Section 21081.8 and contained in the Final Environmental Impact Report as an integrated component of the 1995 General -Plan and will be implemented accordingly. (95-20) Exhibit A - Page 7 RESOLUTION NO. __12_4_1_ A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF DIAMOND BAR CERTIFYING THE ENVIRONMENTAL IMPACT REPORT FOR THE GENERAL PLAN o! THE CITY OF DIAMOND BAR AND ADOPTING A STATEMENT OF OVERRIDING CONSIDERATIONS. A. Recitals. (i) The City of Diamond Bar initiated proceedings to adopt a General Plan for the City of Diamond Bar pursuant to the provisions of Title 7, Division 1 of the California Government Code, §§ 65360 and 65361. (ii) An Environmental Impact Report ("EIR" hereinafter) has been prepared to address the environmental effects, mitigation measures and project alternatives in accordance with the requirements of the California Environmental Quality Act (CEQA). (iii) Pursuant to Division 6 of Article 14, § 15087 of the California Code of Regulations, a 45 day review period was provided to all affected agencies for review of the draft EIR. (iv) Written comments on the General Plan's draft ETR were received during said review period and have been responded to through the "Response to Comments" contained in the Final EIR submitted to the City Council. (v) The Planning Commission of the City of Diamond Bar, conducted duly noticed study sessions on July 22, August 12 and August 26, 1991 to consider and receive public testimony with 1 EXHIBIT "A" 1. The City Council hereby specifically finds that all of the facts set forth in the Recitals, Part A, of this Resolution, are true and correct." 2. The City Council certifies that the Environmental Impact Report prepared with regard to the City of Diamond Bar General Plan was completed in compliance with the California Environmental Quality Act of 1970, as amended, and the guidelines promulgated thereunder, the City Council has reviewed and considered the information contained in said Environmental Impact Report and that said Environmental Impact Report reflects the independent judgment of the City of Diamond Bar. 3. This City Council finds that the Final EIR has identified all significant environmental effects of the proposed General Plan and that there are no known potential environmental impacts not addressed in the Final EIR, 4. This City Council finds that the Final EIR has described all reasonable alternatives to the proposed General Plan. Further, this City Council finds that a good faith effort was made to incorporate alternatives in the preparation of the S Draft EIR and all reasonable alternatives were considered in the review process of the Final EIR and ultimate decisions on the proposed General Plan. 5. This City Council finds that although the Final EIR 'identifies certain significant environmental effects that will result if the proposed General Plan is'adopted, all _- significant effects that can feasibly be mitigated or avoided 3 The Final Environmental Impact Report identifies the following unavoitiable adverse impact which may occur upon implementation of the Plan: (i) Biological Resources: (a) Loss of vegetation and wildlife displaced from potential development areas. (b) Potential removal of woodlands and riparian brush, (ii) Transportation/Circulation: Contribution to the local and area -wide need for expanded transportation systems. (iii) Air Quality: (a) Short-term air quality impacts associated with the construction phases of development *(e.g., construction equipment, emissions, etc.). (b) Long-term stationary and mobile source air emission increases. (iv) acoustic Environment: (a) Short-term acoustic impacts during grading, infrastructure installation and building construction. (b) Long-term acoustic impacts occurring from increased traffic and urban activities. (v) Land Use: Potential alternation of open space and agricultural lands within the City. (vi) Public Services and Facilities: Increased demands on fire, police protection, schools, libraries, 5 (v) The Plan will assure that geologic and safety considerations influence the preparation of development plans and proposals and requires that such considerations are reflected in each development proposal, including requirements for architecture and site design which are sensitive to the topography and the significant natural resources of,the City and its sphere of influence. (vi) The Plan will encourage a safe and convenient system of circulation and access which is responsive to local and regional considerations, and will provide adequate levels of public services, facilities and utilities which are properly sequenced to ensure that such necessary public services, facilities and utilities are in place in conjunction -with development as it occurs in a manner superior to that which would be provided through the other alternatives, including the "no project" alternative. (vii) The Plan will promote the establishment of adequate funding mechanisms in order to provide identified infrastructure and circulation improvements which will be required and will 4e implemented to an equitable fashion. (viii) Each alternative analyzed in the Final Environmental Impact Report, includinq the "no project" alternative, produce unavoidable adverse impacts. The Plan is superior to each of the alternatives presented, including the "no project" alternative, in that it minimizes such unavoidable 7 ADOPTED AND APPROVED this 14th day of July, 1992. yay!Mayor I, LYNDA BURGESS, City Clerk of the City of Diamond Barr, do hereby certify that the foregoing R*solution was passed, adopted and approved at a regular meeting of the City Council of the City of Diamond Bar held on the 14th day of July, 1992 by the following vote: AYES: COUNCIL MEMBERS: Forbinq, K111ar, Warner, MPT/Paper and M/Kin NOES: COUNCIL ME"ER9: nope ABSENT: COUNCIL MEMBERS: none ABSTAINED: COUNCIL MEMBERS: nope Attest: 1 i; arCityee, H11011 %CCsn=$%C3 9 ADDENDUM NUMBER 2 TO FINAL EIR. FOR THE CITY OF DIAMOND BAR 1995 GENERAL PLAN APRIL 1995 PURPOSE AND SCOPE OF ADDENDUM NUMBER 2 TO THE FINAL EIR Section 15164 of the California Environmental Quality Act (CEQA) Guidelines states the following: "(a) The lead agency or responsible agency shall prepare an addendum to a previously certified EIR if some changes or additions are necessary but none of the conditions described in Section 15162 calling for preparation of a subsequent EIR have occurred. (b) An addendum to an adopted declaration may be prepared if only minor technical changes or additions are necessary. (c) An addendum need not be circulated for public review but can be included in or attached to the final EIR or adopted negative declaration. (d) The decision-making body shall consider the addendum with the final EIR or adopted negative declaration prior to making a decision on the .project. (e) A brief explanation of the decision not to prepare a subsequent EIR pursuant to Section 15162- should be included in an addendum to an EIR, the lead agency's required findings on the project, or elsewhere in the record. The explanation must be supported by substantial evidence." Addendum Number 2 to the Diamond Bar General Plan Final EIR has been prepared in response to modifications made to the General Plan considered at the time the Final EIR was certified. Addendum Number 1, which was prepared for the 1993 version of the Plan, was certified by the City Council on July 27, 1993. Addendum Number I is no longer a valid document since that version of the General Plan was rescinded. For purposes of this Addendum (Addendum Number 2), the General Plan proposal analyzed in the 1992 Final EIR and the proposed 1995 General Plan will be discussed. The planning area addressed in the General Plan is comprised of the 1 INTRODUCTION Final EIR for the 1992 General Plan The Diamond Bar City Council adopted and approved Resolution 92-43 on July 14, 1992, which certified the Final EIR for the 1992 Diamond Bar General Plan. In Resolution 92-43, the City Council found that the Final EIR identified all significant environmental effects of the 1992 General Plan'and that there was no known potential environmental impact not addressed in the Final EIR. Furthermore, the City Council identified the following significant impacts which could have occurred due to implementation of the 1992 Plan: (1) Biological Resources; (2) Transportation/Circulation; (3) Air Quality; (4) Acoustic Environment; (5) Land Use; and (6) Public Services and Facilities. Contained within this same resolution, the City Council also found that the facts supporting these findings were contained in the Final EIR, the 1992 General Plan text, and the information provided to the Council during the public hearing conducted with respect to the 1992 General Plan and the Final EIR. Mitigation measures, including a Mitigation Monitoring Program, were made a condition of approval of the 1992 General Plan and are intended to mitigate and/or avoid the significant environmental effects identified in the Final EIR. The General Plan itself is a mitigation measure which is' intended to mitigate or avoid the significant environmental effects of development which could otherwise occur without a planned, comprehensive approach, as embodied in the General Plan goals, objectives, and strategies. Proposed 1995 General Plan Following adoption of the City's first General Plan in 1992, a residents' group circulated a referendum to reject the Plan. The referendum was qualified to be submitted to voters. The City Council exercised its option to reconsider the adoption of the 1992 General Plan and as a result, on March 16, 1993, rescinded its prior resolution adopting the Plan. The City Council then directed the preparation of a broad-based community participation program to encourage and obtain community input into a revised 1993 General Plan. An extensive series of five public workshops (April, May) and nine public hearings (May, June, and July) were conducted. Workshops and public hearings were noticed to the community by means of newspaper acts, posters, press releases, cable television public service announcements, and direct mailings to approximately 300 persons and organizations. The results of this process were used in formulating the 1993 General Pian to reflect the community consensus regarding to be mitigable, with no new or greater impacts than those identified in the Final EIR. 1. Biological Resources Setting Several areas that support native plants and animals, including areas of oak, walnut, and riparian woodlands, are located in the planning area. No specie listed as threatened or endangered has been identified in the planning area, although possible presence cannot be entirely discounted (Final EIR, p. IV -5). The middle portion of Tonner Canyon, within the City's SOI, represents an important biological resource including sensitive oak, walnut, and riparian woodlands and sensitive plant and animal species. This area is classified as a Significant -Ecological Area (SEA) by Los Angeles County (Final EIR, p. IV -5). Final EIR (Impact: Significant but mitigable) Development will cause the removal of additional native vegetation and extirpation of additional wildlife that now exists in the planning area. However, development according to the existing. General Plan will preserve significant amounts of open space that remain within the planning area, and these areas provide the .most support for remaining local plants and animals (Final EIR, p. IV -5). Development of all lands within the SOI could seriously affect biological resources in Tanner Canyon. However, the General Plan proposed to maintain the canyon in the Agriculture/Specific Plan and Planned Development (PD) use categories, and strict development standards contained in the Plan will preserve existing natural resources. As discussed in the Final ElF, most major canyons and hillsides supporting oak, sycamore, walnut and riparian woodlands will be preserved. Mitigation measures, in the form of General Plan policies, are included to mitigate development impacts. General Plan policies related to biological resource include: establishing Open Space and Park land use designations; maintaining an inventory of open space commitments; identifying open space resources and funding mechanisms; protecting hillside areas; recognizing environmental limitations; requiring biological assessments; including natural open space in projects, preserving hillsides and natural vegetation in hillside areas; protecting -biological resources; minimizing fire hazards; and, minimizing roadway impacts to natural slopes. 5 2. Transportation/Circulation Setting The planning area's location at the interchange of major cast/west and north/south freeways (State Routes 60 and 57) and pre -incorporation decisions constrain the City's ability to substantially modify or expand the existing circulation system. While the system is adequate for ordinary local- traffic requirements, the existing freeway interchange design forces regional commuter traffic onto local streets creating extreme congestion during peak travel periods. Final EIR (Impact: Significant but mitigable) As part of the City's 1992 Draft Circulation Element, a traffic engineer, DKS Associates, prepared a Travel Forecast Model to estimate future intersection and roadway impacts in the planning area. According to the DKS model, buildout of the planning area will incrementally increase traffic on local roadways as well as routes that provide regional access. However, most of the anticipated future traffic increase will result from development outside of the planning area limits, primarily from areas to the east. Development in areas such as Chino Hills will significantly increase traffic on local streets, creating more congestion at local intersections that already exceed an acceptable service level, while also causing more local intersections to exceed this standard as well (Final EIR, p. IV -38). To mitigate traffic impacts, the 1992 Circulation Element incorporated applicable portions of the Los Angeles County Congestion Management Plan as required by AB 1791. This plan outlines roadway and other physical improvements needed to meet regional circulation needs. At present, none of the roadways identified by the County as part of the Congestion Management network are within the planning area (Final EIR, p: IV -38). The Circulation Element also includes provisions for transportation demand management (TDM), which are methods to reduce regional traffic which can implemented at the local level on new projects and programs (Final EIR, p. IV -38). The City will implement appropriate Congestion Management and transportation demand management plans as required by the Los Angeles County Transportation Commission, as well as applicable regulations of the South Coast Air Quality Management District (SCAQMD) and the Southern California Association of Governments (SLAG), as outlined in the Circulation Element (Final EIR, p. IV -38). 1995 General Plan (Significant but mitigable) The Final EIR evaluated the circulation impacts of a General Plan buildout greater than that proposed in the 1995 General Plan. The commercial/industrial buildout potential in the Final EIR circulation analysis is 11.2 million square feet, while the 1995 General Plan proposes a commercial/industrial buildout potential of only 7.4 7 3. Air Quality Setting The entire South Coast Air Basin, including Diamond Bar, suffers from poor air quality. Pollutants are not only generated locally within the east San Gabriel Valley, but are also transported downwind from the Los Angeles Basin. Local ozone levels have exceeded State standards on over 95 days -per year since at least 1986. Final EIR (Impact: Significant even after implementation of all feasible mitigation measures) Ultimate buildout of the planning area will add significant amounts of air pollutants into the regional air basin, mainly from increased vehicular exhaust and stationary sources. In addition, construction activities during building will add to the local pollutant load, mainly in the form of fugitive dust and construction vehicle exhaust. To mitigate air quality impacts, the Final EIR requires the City to implement all feasible measures and programs required by the SCAQMD regarding carpooling, ridesharing, etc. The recent relocation of the SCAQMD offices to Diamond Bar offers the City unique opportunities to explore new and innovative programs to improve air quality. In addition, goals and policies in the various elements of the General Pian will assist in reducing air quality impacts. 1995 General Plan (Impact: Significant even after implementation of all feasible mitigation measures) The General Plan Final EIR indicates that ultimate buildout of the planning area will add significant amounts of air pollutants to the regional air basin. This will still be the case under buildout conditions for the 1995 General Plan. However, based on reductions in commercial/industrial .square footage and subsequent 'reductions in daily vehicle trips compared to what the Final EIR circulation analysis evaluated (see discussion above for Transportation/Circulation), buildout under the 1995 General Plan is expected to result in about 94,000 fewer daily vehicle trips. Air pollution from vehicles will be reduced due to fewer trips, and pollution from construction equipment will be reduced due to less potential commercial/industrial development. The strategies identified in the Final EIR intended to reduce air emissions are also included in the 1995 General Plan. Including these strategies along with lowering daily vehicle trips and reducing commercial/industrial buildout potential will incrementally reduce air quality impacts compared to those identified in the Final EIR, but not below the significant level. W highways; (4) the development of land use transitions as noise buffers; and (5) noise standards and noise reduction requirements. The additional strategies noted above will further reduce impacts on the acoustic environment as identified in the General Plan Final EIR. 5. Land Use Setting Existing land uses within the City of Diamond Bar are primarily residential, with supporting neighborhood commercial centers, freeway frontage retail/commercial, and newly expanding office and professional uses. These uses are supported by various roadways and public utility structures. According the California Department of Finance (1993), the City has a total of 17,813 dwelling units, with the majority (70.5 percent) being single-family detached units (1995 Housing Element). Final EIR (Impact: Significant but mitigable) The Final EIR for the 1992 General Plan examines an ultimate buildout of the planning area, including converting approximately 1,913 acres of vacant land to various suburban uses, primarily housing. Also, various areas are designated for commercial, office, open space, and agricultural uses. Planned development of several remaining large open space areas, including Tres Hermanos and the south end of "The Country," would ultimately change the overall character of Diamond Bar. However, this change need not be viewed as negative if development is sensitive to natural resources and surrounding land uses (Final EIR, p. IV -7). For example, the 1992 General Plan designates almost 4,000 acres within the planning area for open space, recreation, and agriculture. Also, the Land Use Element contains controls on development to minimize impacts on surrounding land uses, the natural environment, and infrastructure. The Final EIR project description anticipates a residential buildout of 23,899 dwelling units and a commercial/office/business park buildout of 6.17 million square feet. 1995 General Plan (Significant but mitigable) The 1995 General Plan recognizes that some vacant parcels are suitable for development while others should be preserved for open space because of their environmental value. Major components of the "Diamond Bar Vision" are identified in the General Plan Vision Statement. These are: (1) retention of the ruraVcountry living community character of Diamond Bar; (2) preservation of open space resources; (3) reduction of regional traffic impacts on local streets; (4) promotion of viable commercial activity; (5) provision of well-maintained, attractive housing; and (6) creation of a community environment. 11 units; (2) the Tres Hermanos Planned development, occupying 800 acres at the northeast corner of the City; (3) the 3,591 -acre SOI area; and (4) other vacant parcels (10 or more) found throughout the City. Although other land is available within the City, much of it is very steep or has other physical constraints that would generally preclude its use for moderate density residential development. The land within the planning area available for general residential development could yield an additional 3,005 units (1995 Housing Element), for a residential buildout of 20,818 dwelling units, a reduction of 3,081 units from the buildout forecast in the Final EIR. (The traffic analysis in the Final EIR evaluates a slightly smaller residential buildout of 20,428 dwelling units, but a substantially larger commercial/industrial buildout of 11.2 million square feet, or 3.8 million square feet more than what the 1995 General Plan proposes.) The 1995 General Plan addresses other land use issues, including; (1) providing "adequate separation and buffering of less active residential uses from more intense land uses, major streets, and highways"; (2) requiring a specific plan in the SOI to protect its unique biological and open space resources; (3) minimizing grading to retain natural vegetation and topography; (4) enacting Development Code provisions to develop second units on single-family parcels while maintaining single-family character, neighborhood integrity, and infrastructure capacity (this strategy helps provide for affordable housing); (5) developing an open space program that will identify and preserve open space land and rank its importance in coordination with the Slope Density Scale Ordinance; (6) establishing a review and decision making process for any potential • removal of open space dedications; (7) obtaining Open Space land through feasible acquisition and management techniques, including entitlement review and density transfer, bond issues, lighting and landscape districts, and below-market purchase in exchange for development; (8) designating five Planned Development areas and requiring a master plan for each; (9) clustering development to preserve open space and natural resources; (10) integrating complementary development types (e.g., commercial, residential); and (11) calculating citywide development capacities for each land use designation, including floor area ratio (FAR) for nonresidential development as appropriate. The overall reductions in buildout potential, and additional controls on new development, will reduce potential land use and other environmental impacts. Especially, the designation of the five Planned Development areas and the SOI Agriculture area, including the planning and review processes inherent in the designations, will provide the City with the opportunity to minimize potential environmental impacts. Based on the analysis in this Final EIR Addendum Number 2, the changes considered in the 1995 General Plan will not result in any new or more adverse impacts not already considered in the Final EIR. The findings adopted by the City Council in Resolution 92-43 regarding certification of the Final EIR for the General Plan are considered current and valid for the 1995 General Plan. 13 things, appropriate design/plan review, minimizing potential hazards, financing of new public services and facilities, and providing sufficient municipal income to ( support services and facilities, planning within natural resource limits, using feasible technologies to conserve water, using reclaimed wastewater, using drought -tolerant landscaping materials, and developing a contingency plan for extended drought. 1995 General Plan (Impact: Significant or potentially significant but mitigable) The Public Services and Facilities Element contained in the 1995 General Plan is more comprehensive than the 1992 Element. Strategy 1.1.5.b supports development of appropriately sited, environmentally sensitive, solid waste treatment facilities. New or modified, strategies include. (1) requiring all new subdivisions to be connected to a public sewage system; (2) investigating and, if feasible, initiating the establishment of a redevelopment agency; (3) encouraging joint development of recreational facilities with the local school districts; (4) enabling, through appropriate zoning and development regulations or with a Conditional Use Permit, the construction and operation of private school facilities; (5) retaining and providing community social gathering places, including active and natural park lands, community centers, and plazas; (6) maintaining a public information program such as a "community calendar"; (7) encouraging organization of individual neighborhoods and discouraging through traffic on local streets while maintaining pedestrian and bicycle continuity, and encouraging neighborhood parks, improvement programs, and social events; (8) promoting sales tax generation; and (9) working with State officials and local elected representatives to promote statewide legislation to secure stable financing of local government, including an equitable distribution of sales tax revenues. Residential unit buildout projections contained in the 1995 General Plan Land Use Element are less than those analyzed in the Final. EIR. Also, 1995 General Plan strategies are more comprehensive. As a result, impacts on public services and facilities will not be greater than impacts identified in the Final EIR. The strategies added to the 1995 General Plan are intended to further reduce impacts. CONCLUSION Based on the -analysis in this Final EIR Addendum Number 2, the changes considered in the 1995 Diamond Bar General Plan will not result in any new or more adverse impacts not already considered in the Final EIR. REFERENCES City of Diamond Bar General Plan Document 3: Environmental Impact Report. City Council certification: July 14, 1992, Resolution No. 92-43. 15 ADDENDUM TO FINAL EIR FOR THE CITY OF DIAMOND BAR 1993 GENERAL PLAN PURPOSE AND SCOPE OF ADDENDUM TO THE FINAL EIR Section 15164 of the California Environmental Quality Act (CEQA) Guidelines states the following: "(a) The Lead Agency or a Responsible Agency shall prepare an addendum to an EIR if: (1) None of the conditions described in Section 1162 calling for preparation of a subsequent EIR have occurred; (2) Only minor technical changes or additions are necessary to make the EIR under consideration adequate under CEQA; and (3) The changes to the EIR made by the addendum do not raise important new issues about the significant effects on the environment. (b) An addendum need not be circulated for public review but can be included in or attached to the final EIR. (c) The decision-making body shall consider the addendum with the final OR prior to making a decision on the project." This addendum to the Diamond Bar General Plan Final EIR is prepared in response to modifications made to the previously adopted General Plan for which the Final EIR was prepared. For purposes of this addendum, the originally adopted 1992 General Plan and the proposed 1993 General Plan will be discussed. The environmental impacts associated with the proposed modifications included in the 1993 General Plan will not alter the findings made in the original resolution certifying the Final EIR. No public review or additional recirculation of the Final EIR is required. Proposed 1993 General Plan ( Following adoption of the 1992 General Plan, a residents' group circulated a referendum which was ultimately qualified. The City Council exercised its option to reconsider the adoption of the 1992 General Plan- and as a result, on March 16, 1993, rescinded its prior resolution which adopted the Plan. The City Council then directed the preparation of a broad-based community participation program to encourage and obtain community involvement and create the 1993 General Plan. An extensive series of five public workshops (April, May) and nine public hearings (May, June and July) have been conducted. Workshops and public hearings were noticed to the community by means of newspaper ads, posters, press releases, cable television public service announcements, and direct mailings to approximately 304 persons and organizations. The results of this process were used in the formulation of the 1993 General Plan to accurately reflect the community's consensus of its vision for the future. Changes to the 1993 General Plan are shown by "red line" (to show new text) and strike -out (to eliminate existing text). Like the 1992 Plan, the 1993 General Plan is driven by three overriding issues which have a multitude of implications on the City's future. These issues include: Land Use (including open space); Circulation; and, the economics of municipal governance. As stated earlier, Resolution 92-43 identified six significant unavoidable adverse environmental effects of the 1992 General Plan. Mitigation measures in the Final EIR have been identified that are intended. to mitigate and/or avoid these significant environmental effects. The environmental impacts of these six areas will be discussed for the 1992 General Plan (as summarized in the Final EIR), and then reviewed for the 1993 General Plan. Mitigation measures contained in the Final EIR will be listed along with any relevant changes incorporated in the 1993 General Plan. The Final EIR analyzed 20 separate issue areas, consistent with the environmental checklist contained in CEQA, to determine the impact of the 1992 General Plan on the environment. The following issue areas were determined to be mitigable to a less than significant level: landform and topography, earth resources and seismicity; drainage and flood control; cultural resources; socioeconomics (housing); crime prevention and services; fire hazards and protective services; health and emergency services; hazardous materials; recreation and open space; wastewater; solid waste; and energy systems. With substantially fewer residential units projected at buildout under the 1993 General 3 Proposed 1993 General Plan (Impact: Significant but rnitigable) The 1993 General Plan recognizes the importance of the remaining open space and biological resources within the City and the SOI. The 1993 General Pian includes a vision statement that, among other things, addresses preservation of open space resources and the biological resources contained therein. Significant open space areas exist within the boundaries of Diamond Bar and within its SOI. Portions of the 3,591 acre SOI and abutting lands within the City have been included in Significant Ecological Area 15 by the County of Los Angeles. SEA 15 is considered to be a major open space asset to the community. The City will play a proactive role in the preservation of this resource by assuring that extensive analysis and review precede any changes from its current uses and activities (1993 General Plan, p.1). In addition to the goals, policies and strategies included in the 1992 General Plan some new strategies, related to open space and biological resources have been included in the 1993 General Plan (Resource Management Element, Land Use Element). Also, some strategies contained in the 1992 General Plan have been modified, or in some instances, deleted entirely. Additional strategies contained in the 1993 General Plan include: identifying deed and map restrictions, defining "open space" lands, developing an open space program to identify and acquire/preserve open space land; recognizing the significance of SEA 15 ecological resources; seeking to acquire land for parks and natural area conservation; developing a tree preservation ordinance; and, allowing wildlife migration access by use of tunnels or other practical means. The 1993 General Plan also establishes a definition for an "environmentally sensitive transportation corridor." This transportation facility is defined by characteristics that cause the facility to have minimal impact to the environment and adjacent ecosystem (1993 General Plan, Circulation Element p.V-4). The 1993 General Plan also recommends evaluating environmentally sensitive regional transportation linkage options through the easterly portion of the SOI area which avoid disruption of SEA 15 resources (1993 General Plan, Circulation Element p.V-11). These additional policies and strategies are expected to further lessen impacts on biological resources as identified in the Final EIR. 2. Transportation/Circulation Setting The City's location at the interchange of major east/west and north/south freeways (State Route 60 and 57) and pre -incorporation decisions effectively limit the City's ability to achieve an efficient circulation system. While the local circulation system is adequate for ordinary local traffic requirements, the M participation in the discussion of these needs and possible solutions (1993 General Plan, Land Use Element p.I-10). In addition to the goals, objectives and strategies identified in the 1992 General Plan, some, new goals and strategies related to circulation have been included in the 1993 General Plan. Also, some strategies contained in the 1992 General Plan have been modified, or in some instances, deleted entirely. Additional circulation -related strategies contained in the 1993 General Plan include: monitoring the progress of major regional developments; cooperating with appropriate organizations to achieve maximum interaction and cooperation; participating fully in relevant regional development patterns; encouraging coordination with adjacent cities and other agencies to lobby government on regional issues; evaluating potential impacts of major proposed regional developments to anticipate land use, circulation, and economic pattern of the City; relating major regional impacts to planning action to safeguard quality of life; continuing to seek support for Regional State Transportation Improvement Program (RSTIP) projects as proposed by the City; encouraging Orange and San Bernardino Counties to fund and construct an environmentally sensitive transportation corridor roadway through Soquel Canyon and/or Carbon Canyon; pursuing development of additional lanes on SR60 easterly of the City; pursuing other traffic measures to enhance circulation and transient traffic movements; minimizing impacts of roadways serving Diamond Ranch high school site on surrounding residential neighborhoods; and synchronizing signals on Grand Avenue through the City. Strategy 1.1.4 calls for the City to proactively work with adjacent jurisdictions in the evaluation of environmentally sensitive regional transportation linkage options through the easterly portion of the SOI which recognize environmental sensitivity and avoid disruption of SEA 15. These additional strategies are expected to further lessen circulation impacts as identified in the Final EIR. 3. Air Quality Setting The entire South Coast Air Basin, including Diamond Bar, suffers from some of the worst air quality in the nation. Pollutants are not only generated locally within the east San. Gabriel Valley, but are also transported downwind from the Los Angeles Basin. Local ozone levels have exceeded State standards on over 100 days during each of the last three years. 7 noise levels in areas adjacent or proximate to the local freeways may reach or exceed acceptable planning noise standards (Final EIR, p.IV-9). There are several major local roadways that generate 65 CNEL levels beyond the right-of-way. The only other major sources of local noise are the railroad lines along the western boundary of the City and infrequent urban sources. 1992 General Plan (Impact: Potentially significant but mitigable) Buildout of the City will incrementally increase local noise levels primarily from mobile sources, as local traffic volumes increase. Localized noise levels will also increase during construction activities. A noise analysis of local roadways was performed by Endo Engineering. At buildout, local noise levels along major roadways will increase. While these noise levels are not significantly adverse, they could be .potentially adverse if sensitive land uses were allowed to be built where exterior CNEL noise levels exceeded 65 dB (Final EIR, p.IV-10). Development'in the SOI, as proposed in the General Plan will minimize potential noise impacts. The Plan for Public Health and Safety provides guidelines for adequate setbacks, consideration of noise in site and building design, etc. (Final EIR, p.IV-10). 1993 General Plan (Impact. Potentially significant but mitigable) The 1992 General Plan Final EIR indicates that ultimate buildout of the City and its sphere of influence will incrementally increase the noise contours as traffic volumes increase. This will still be the case under buildout conditions for the 1993 General Plan. However, based on changes to residential land use designations (discussed in more detail in the Land Use section below), buildout under the 1993 General Plan may involve an estimated 1,900 additional dwelling units compared to 6,235 dwelling units projected in the 1992 General Plan. This reduced residential buildout projection will in turn lower projected traffic volumes and associated noise levels on local streets. The strategies identified in the 1992 General Plan intended to reduce noise impacts are also included in the 1993 General Plan. Incorporating these strategies along with substantially lowering residential buildout and traffic volumes will further reduce noise impacts compared to the 1992 General Plan. 5. Land Use Setting Existing land uses .within the City of Diamond Bar are primarily residential, with supporting neighborhood commercial centers, freeway frontage retail/commercial, and newly expanding office and professional uses. These uses are supported by various roadways and public utility structures. According the, preliminary 1990 E residential, with 4,952 acres (52 percent) of the land developed for housing. Buildout under the 1992 General Plan would increase the City's housing stock by 6,235 units. According to the Final EIR, development within the City under the 1992 General Plan will produce the fewest changes in land use patters from those that exist today. Although the land use changes brought about by buildout will be significant, they need not be adverse as long as adequate controls are employed to minimize impacts. The Plan for Community Development includes controls on development to minimize impacts to surrounding land uses, the natural environment, and man-made systems. Development in Tonner Canyon under the 1992 General Plan will be limited and planned to avoid impacts to open space resources. Numerous strategies in all elements of the General Plan are intended to reduce land use impacts. 1993 General Plan (Impact: Significant but mitigable) The 1993 General Plan is driven by three overriding issues which have a multitude of implications on the City's future. These issues include: Land Use (including open space); Circulation; and, the economics of municipal governance. With regard to land use, there are still some substantial vacant parcels of land in the community and the SOI. Some vacant parcels are suitable for development and other should be preserved for open space because of their significant environmental value. Three major sub -issues have been identified that affect formulation of land use policy for Diamond Bar. These sub -issues include: (1) economic pressure conflicts with community desire to maintain the quality of existing environment; (2) status of deed and map restrictions; and, (3) the status of the significant ecological areas within SEA 15 (Tonner Canyon/Chino Hills Significant Ecological Area). The 1993 General Plan establishes a land use classification system including residential and commercial designations. The 1993 General Plan identifies five residential designations, as compared to four designations in the 1992 General Plan. These :designations include (Strategy 1.1.1): , a. Designate hillside areas with an average slope greater than 25 percent as Rural Residential (RR). The maximum gross density of Rural Residential will be 1.0 dwelling unit per gross acre (1.0 du/ac). b. Designate existing developed single-family detached residential parcels as Low Density Residential (RL). The maximum density of such Low Density Residential parcels will be 3.0 dwelling units per gross acre (3.0 du/ac), or existing density, whichever is greater. 11 This reduction in total projected housing would, in turn, generally lessen the environmental impacts associated with land use. Open space and biological resources are maintained through the agricultural designation of these large tracts of land. Based on this analysis, the changes considered in the 1993 General Plan will not result in any new or more adverse impacts not already considered in the Final EIR. The findings adopted by the City Council in Resolution 92-43 regarding certification of the Final EIR for the General Plan are considered current and valid for the 1993 General Plan. 6. Public Services and Facilities Setting Issues of concern in this section include those associated with provision of public services, particularly schools and libraries, and public facilities such as water, sewer, solid waste disposal, electricity and natural gas. Formal educational services are provided by the Walnut Valley Unified School District and the Pomona Unified School District. Both districts indicate almost all of their facilities are overcrowded and may not be able to accommodate growth in the future (Final EIR, p.IV-21). Library services are provided by the Los Angeles County Library System, which maintains a community library in the City. At present, this library does not meet either County or American Library Association standards in terms of volumes of books or facilities (Final EIR, p.IV-21). Water is distributed by the Walnut Valley Water District which projects a buildout population for the City of Diamond Bar at 75,000 people, more than that projected in the 1992 General Plan. The uncertainty of future water supplies and availability will continue to be constraint to future growth. 1992 General Plan (Impacts: Significant or potentially significant but mitigable) Increased residential development will likely increase the demand for additional public services and improvements to existing utilities and other public facilities. Although funding for programs and new facilities comes from the State, local schools have been historically underfunded and do -not have sufficient revenues at present, or anticipates them in the near future, to adequately fund needed facilities. At present, many residents use library services in neighboring communities; there are no plans to expand County library services within Diamond Bar. 13 N PREPARED FOR: CIN OF DW40ND BAR 21660 E. COPLEY DRIVE SUITE 100 DIAMOND BAR, CA 91765-3117 PREPARED BY: PLANNING NETWORK 9375 NORTH ARCHIBALIJ AVE" SUITE 101 RANCHO CLICAMONGA. CA 91730 _.,ty 9. 1992 CITY OF DIAMOND BAR GENERAL PLAN Et110100arreL JW&CT MMIM PREPARED FOR: City of Diamond Bar 21600 E. Copley Drive Suife 100 Diamond Bar, CA 91765-3117 PREPARED BY: PLANMNG NEWORK, 9375 N. Archbald Avenue, Suite 101 Rancho Cucamonga, CA 41730 Planning Commission Recommendation: June 8, 1992 Re:okAon No. 92-14 City Council Adoption: July 14, 1992 Rewlutlon No. 92.44 GENERA! PIAN FORMAT The 1992 Diamond Bar General Plan is divided into three documents for ease of reference. 1. DocUMEw 1: GENERAL PLAN - The first document contains the five actual divisions of the General Plan proper, that is, the compilation of the goals, objectives, and implementation strategies of the Plan. This document contains an introduction, and the Plans for Community Development, Resource Management, Public Health. and Safety, Public Services and facilities, and Physical Mobility. 2. DocuMEw 2: MASTER EwRONMe AL Assasww This document contains the Master Environmental Assessment for the City, which will provide a comprehensive and consistent baseline of environmental data from which further (project -specific) environmental analyses can be performed. 3. DocUMEW 3: EWRONMENTAL IMPACT PWKWTJTe0*ACAL APPE mES - This document contains the Draft Environmental Impact Report for the General Plan, Including the Notice of Preparation and Responses. The EIR contains the appropriate environmental documentation for the General Plan as required by the California lnvironmentat Quality Act (CEQA) including detailed analyses of the various impacts of ultimately developing Diamond Bar. This document also contains all of the technical appendices not specifically related to the EIR, such as noise, air quality, land use summaries and alternatives, etc. The organization of the General Plan can thus be visualized as follows: _11.=.1' Introduction Plan For land Use Plan For Housing Plan For Resource Management Plan For Pubf#c Health and Safety Pian For Public Services and Facliltles Pian For Physical Mobility Master Environmental Assessment Docesnwd 3 Envlronmentaf Impact Report Technical Appendices TABLE OF CONTENTS A. CUMULATIVE IMPACTS A. LANDFORMS AND TOPOGRAPHY............................... ................... VI -T 8. EARTH RESOURCES AND SEISMICITY VI -1 C. .............. DRAINAGE AND FLOOD CONTROL VI -2 D. . BIOLOGICAL RESOURCES VI -2 E. . , ....... LAND USE ........... Vi -3 F. AIR QUALITY VI -3 G. ........ .............................. NOISE VI -4 H. ........... CULTURAL RESOURCES VI -4 I. ............. SCCIOECONOMICS V1-4 J. ................... CRIME AND PREVENTION SERVICES VI -5 K. FIRE HAZARDS AND PROTECTIVE SERVICES L. HEALTH AND EMERGENCY SERVICES VI -5 M. .. HAZARDOUS MATERIALS VI -5 N. ......... . RECREATION AND OPEN SPACE VI -6 O. .. .. EDUCATIONAL SERVICES VI -6 P. .... , ................................... WATER VI.7 G. ..... WASTEWATER ............................................ VI -7 R. SOLID WASTE.. ............................................ VI -7 S, ENERGY VI -7 T. ..................................................: ............ CIRCULATION VI -8 .................................. ......................................... VI -8 VIII. GROWTH -INDUCING IMPACTS ........................................... VII -1 VOL WvNIFCANr UNAVO®AME ENVIRONMENTAL EFFECTS ......................... VIII -1 DC SHM TERM USE VERSUS LONG-TERM PROOUCTM.. A. WATER K-1 B. .........................................IX-1 ............ ... BUILDING MATERIALS C. .............. FOSSIL FUELS DC -1 ................................................. N-2 X 5iGNIFfCJWf IRRI VERSOLE ENVIRONMENTAL CHANGES .......................... X-1 XI. ADDITIONAL MATERIALS A. ................................. ........................ ....... .... PERSONS CONTACTED A-1 B. ........................ BIBLIOGRAPHY J�.T TEC!-NAC,AL ............................................... APPENDICES A-5 A NOTICE OF PREPARATION B LAND USE C AIR QUALITY D NOISE E RESPONSE TO COMMENTS CITY or DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT .iter 9,1993 u LIST OF TABLES Table 111-1 Diamond Bar General Plan - Environmental Table 111-2 Issues ............ , , .. Existing Land Uses (City-wide) 111.3 Tabic I11-3 ................... ...... ..... Existing Land Uses (Sphere of Intluence) 111-6 Table 111.4 .. Existing Land Use (by acres) Iff-7 Table 111.5 ....... Existing Land Uses (by percent) ............. .... .111-9 111-8 Table 111-6 Existing Land Uses Comparison ... I .................. of Population and Employment Table III -7 . . . .. Proposed Land Uses Diamond Bar City Council -Map 23, 1992 III -10 Table IV -J-1 ,lune , ... Projected Protective Service Needs I11-11 Table N -J-2 ................ . Recommended Lighting Levels N-15 Table N -P-1 ............... . .. Daily Water Use in Diamond Bar 1y-15 Table IV -Q-1 ..................................... . Daily Sewage Generation -Existing N-23 Table N -Q-2 .................................. Dally Sewage Generation -Buildout N-25 Table MR-11Existing .............................. Solid Waste Generation N-26 Table IV -R-2 (Pounds/Day) ....... Projected Solid Waste Generation (Pounds/Day) N-28 Table IV -T-1 ..................... Local Intersection Congestion N-29 Table IV -T-2 ................... .... Traffic Impacts at Buildout . .........N-34 N-33 Table V-1 Land Use Comparison of General Plan Alternatives Table V-2 ... .............. Sphere of influence - Land Use Comparison of y-3 General Plan AlternativesV Table V-3 . , ... . . • . Comparison of General Plan Alternattves by Land Use 4 Table V-4 Acreage Comparison of General Plan AlternoWes by Percent of Land Area V-5 Table V-5 ........ Population and Employment for General. Plan Altemattves V -b Table V-6 .............. Projected Protective Service Needs V-7 Table V-7 By Alfernattve ................... Parkland Needs by Alternative V-11 Table V-8 ................................. Educational Service Impacts by Alternative V-13 Table V-9 ........................ Domestic Water Demand by Alternative V-13 Table V-10 .......................... Solid Waste Generation by Alternative V-14 Table V-11 .................. Traffic Impact for General Plan Alternctives V-15 Table V-12 ........................ Environmental Impacts Comparison V-17 Table VI -1 by Alternative ................... Summary of Cumulative impacts V-18 ................................. CITY Of DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT Juiv 9,1442 IV I. INTRODUCTION CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT J*4,1441 The Diamond Bar General Plan was prepared in accordance with current CEQA guidelines, as established by the State Office of Planning and Research (OPR). The General Plan EIR addressed existing setting, impacts, and mitigation measures in a general, or macro -scale, fashion, it was intended to address City-wide, or regional, impacts'of growth consistent with the City's goals, objectives, and policies. Due to this regional perspective, the General Plan EIR document his the definition of a "Program EIR" under the guidelines of CEQA. As defined in Section 15168, program EIRs are intended to address macro -scale environmental impacts. One of the major advantages of a program EIR is that it allows the Lead Agency to examine the cumulative effects of a large-scale project, such as the proposed City Of Diamond Bar General Plan. Section 15168(b) states: 0... Use of a program EIR can... (1) provide an Occasion for a more exhaustive consideration of effects and alternatives than would be Practical In an EIR on an individual action, (2) ensure consideration Of cumulative impacts that might be slighted in a case-by-case analysis. (3) allow the - Lead Agency to consider broad policy alternatives and program -wide mitigation measures at an early time when the Agency has greater flexibility to deal with basic problems or cumulative impacts." 8. RELATIONSHIP TO FUTURE ENVIRONMENTAL DOCUMENTATION As noted previously, the General Plan Environmental Impact Report was Intended to be a program EIR to address macro -scale impacts. It analyzed the macro -scale impacts expected to result from future growth consistent with the goals. objectives, policies, and land use designations set forth in the Diamond Bar General Plan. This document did not directly examine environmental effects which could or would. result from specific projects located on specific sites within the City. Recognizing that a program EIR can adequately address macro -scale imposts. CEQA provides for its use in the environmental review of subsequent specific projects. In this way, this EIR would be consulted to determine whether a specific project Is consistent with the General Plan, and Is therefore within the general limits of the projected land uses examined in this EIR. Individual projects proposed within Diamond Bar will be reviewed by the City, as Lead Agency, to determine if additional environmental documentation is required. CEQA defines how a Program EIR relates to Incilviduat project EiRs In Section 15168(c) as foAows: To with Later Acihrttlee. Subsequent activities In the program must be examined In the tight of the program EIR to determine whether an additional environmental document must be prepared. 1. H a later activity would have effects that were not examined In the program EIR, a new InItiat Study would need to be prepared, leading to either an EIR or a Negative Declaration. CITY OF DIAMOND BAR FINAL ENVIRONMENT IMPACT RI=PORT J* 9.1992 I-2 D. DOCUMENT FORMAT For the Mitigation Monitoring Plan please refer to the pian available under separate cover. CITY Of •DIAMOND BAR FINAL ENVIRONMENT IMPACT REPORT Jam► 9. 194'2 h4 H. EXECUTIVE SUMMARY CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT iwy 9.194! iwaoNtr WTAL ISSUE - COSTING CONoInoNS IMPACT ANALYSIS S. Land Usk The City encomoatsoo 9,5174 Ocru in rhe East San Gabriel valley and of modurn and low do largely conasldo"restasnnal tract=. Minimal Ultimata buildout of the City will convert 1,97 acres of amounts of supportive commarcfdl, oMce and business park uses the anstln 9 2.763 vacant cues to venous Suburban axes. marnty near malar raceway& area heewoy acceu points, The The City has Cor+t+tlerabie open space olid rsareanana, uses, primarily housing, resumng in the overall change of character, The remaining acreage will remain as open resources. The sphere of Influence is vacant except lot a Boy Scout camping facility specs resources for the City resfaenwi (Flrastorte Regrvvrloui, Summary of Impacts: SignMcant but mmgable 6. Air Quality Local ozone Jewels haw exceeded Stats standards on over T 00 days during each of the pent qtr" yeas. Pofkrtatts ars maurty gensrerted Ultimate City buildout wig add . &in,mcarn amounts of within and haruported dowstwind from the los Angeles basin. Locci coWHIOrw tend to concentrate all taotiutant& Clonq the heeway poqutan Into the r e vehicular erdtdaut and st 'marcs ham increased d�a+y socmcaa. couldom and major intsnecllons In Diamond Sar. The intarsecttoru of Grand GC*Mkw Ocd$uctton dtuktg buudN. ainly d � odd to octet uNIdyat d& weft. mainly dust. AvenuelDiatland &Z boulevard and Grand AvenuelGolden S & Dr1Yr atysW18`1001111 the project air ty that t wile Quality4.26mu exPerwice agnlflcant elevated level& of poffutants tl hours urirtg P driviesg generals of 44.26 taro of air paltutarfts per day. powA day. Summary of fmpocts: Signiifaantty iadvens even atter imptementaffan of avatlable mitiga"on moctsurso 7. Noise Noise andysss Dedomtsd for hsewayrt and ffK*x roadways wM'An the City Indk eft levels In rifcw of file occephat" paanning nol&s wandaft kdck"A at tits Clly WIN inelro tterTkov mucase loud for adfaesnt user aiorq the 57 and 60 hs wm^ area cgnyan Rood, noise levels. prirucxYy from rssasbNe sources f urce ajorV MOW Colima Rood. Diamond bar bosrlevard. Grand Avenue. PCMflndsr Road, roodwgy�- Localized ocalize nobs wile olds ge d df�rir Lemon Golden Spow Drive. and Sunset Crosiksg, Otttor nsa►0r cordmiction s iliacs lord loves& be $490�gy adverse, g srsn lthe land uses wets of lac sources of iced liaise err tits nollnoad lktee erlorq life westeus ally boundary, and Inhrquontt twunc s p.s. Ckpiats OverlNghIL etc.). allowed to be built wtwe exterior CNM mobs isab exceed ncommondsd standardiL Summary Of Impacts: PotenMaNy %IWW cant but mttfgable i. Cultural Reeounwo Accorcllnq to lord tecmds atone ars na 09nMeatt hisiericpi resourcrr I*# In ftw City. Fiowewr q»nr are ft" a[eat In file CMV contralining Mkmfn- N& could be farnd anywhere In the City where tins recorded archosoiogical slier. Thiess &till eantaks mksor an*xb fit grading d0mbe Puente F mlCdtan nxrlerfds, It might not be poni360 b defeunirte potuttial kcaibro of depooft previous ac tilvi les of to GobrNlNrto kxNam No aretta@okq cal &Mala have bean identified in Mss &ptws of ksiluerom iiowewe, the area prior la d ccvery during awayc0on. Undeveloped conidia resources that nW ttavr been WfIPOI XX 9 fear prehhft i¢ residents. portions at tins Clly or Its salters of kt&Wr.s could yfold addItiond ktdlan of tftkx cal antfa t&. Srmmay of kttpacd: PoMntk* signfAcant but mfNgable �. Soeleeeersoentes (Ifaasks� The C1ly of Diamond Oar =**a a MOda# sized e&rtd eMt*=gyr &MW couxrxnNy. PreNlstksaay 1990 csrtstst fig"kndcale that tteven 4ttpirmrr4atfan of q» Gonad Platt WW inscreasr fins prrrCresl Of the WS popaslglton (94,677) It naw repnrarrftsd by rtllnOrtNre. Cftys popaikidton to 77.414, The amount of houaksg urft WW WK"Me 00 23.099 wit aver Ow eWdktg 17,664 and P&nO sly ham wrtoas dot ccrhra&e. Pnknay local houaksg it.. up at Its CompaaiNatt wile curtain pdwom y skgle kn* 100 sknple 1>QnNy delaet+ra. aWOL0 29 percerM of the i 7.661 E+af+al crib as percaro), mut!Womi frWL Skgb km* fteldsirmm in Diamond Bar have brooms moor etrpsesNr In rseeest yNar, and as! rsorlr petted toward lite uppsn: kxuxm fatlNters Summmilf of knpact&: P&wT* ley lrlgnEticatt but tr1BlQat" CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT DEPORT tel► 9.1992 11-2 WROMMIINT L'UUt1 - COSTING CONDITIONS IMPACTAi"LYSIS 15. iduediond Sarviere Campreherwve K•12 educational facilities and Programa are provided W0100State by the WalrValley Unitled and the Pomona Unified School D'iahtcu. funding for school faciilties and programa does not These awricts maintain eight elementary schools, four junior high schoob, prOvaae sufficient revenues to edhm district to and one high scnooi. High school students in Diamond Bar within the Pomona District currently attend Ganeaha High School. Lost adequately fund needed tacUlltes. Currents there are no County Plana for expanded library facilities in year voters approved a bond election by the Pomona DW6= to fund a new high Dlomond Bar. Marry residents cutreniry use library systema in neighboring communities. school In the Trp Hermarsos area 80th districts Presenttq €ndlcafe overcrowded Coldifiarrs In ON faculties and are concerned with their ability to aaCAMOM ate future growth. Library services are provided by Me Los Angekes County Library System, which motntalro a cammunfty librgry m the City. Currently the ANOTY does not meet County or Arnerk= UbMWAssociation domk els far book volumft or taciiflWL Summary of Impacts:5kb,,.,.�r .e cirri Oftel mffl ' adirgation Plenientation of availabiA mitig m megsurea 14. water WWW is provided ro the area by the Three Valley Water 0istrtct and €ocalty dist bated by WaInut valley water DWrict. Almost alt local water, At buudatt. the City wW canSUMO aPP(0x nateiy 13.A is Imported by MWD. Walnut Vatiey water DUstricf is currently preparing a Master Plan of Wager to estimate the City`s buildout water needs based million gatiorsr per day. Although water is preaentiy available in sufflctent quantities, mere are no long. on a Population of 75.000 re enp. The Dista estimates Me CNy's range pions estobustsed ro xcommodamtie growth should the statewide �+gla continue. present usage of 10 miWon golbns per day. The sphere of inftwice presently conaxnfes a very small amount of water. Washnvatw uscge is esfimeted to be 460.000 gakWd per day with a peak consumption of 1 ml4� Per �. Sum mory of Impocb: Potential for 9gnfficon y adverse knpacfs even Offer impwwwmtokm of Coll fecuble mitigation meOsuree 17. Waetewow The County at Los Angeles pravidee w0"wQter conveyance and treatment VWOUgh CounH SOrMbction Dtatrict No. 21. TrecMww is Buildout of the City will Increase generation of Provided by the Joint Wafer Pok lon Control Platt In Carson. The overaa wastewater from 4.7 million to 4.8 million gollons per day, based on present generation nates The amount condition of these ftcokwOPPean to be good, however repeated f &mw of pump sbalkx wfiicA Ifft !lows to regWnd eotleefan haw bow of addNlonoi sewroge can be conveyed and treated exnerieneed. F1v grAllon gallons of sewage are generated by the Cay► based on exitfinC and antletpated facuftWL Long -tern service depends an Me Couniyrs obift to maintakt Per day. Uses In Mee spffere d influence are serviced septic ayaterrts a sirxopsyrensoval syaiuns. byW etrkstMig servicer levels. exrxtirig treatmentfadlfttes, and comPkrkm of planned improvements to accommodate gam• Dem of the sphere of Influence wia require the addiffon of wasfewater conveyance and freatrae d focilffles within the sphere. Summary of Itrtpoatl: S}grtiflcont but mttfgable Existing user rNlW #0 Cay pmw* generate 289 fares of solid wase At bukdort. eatlmahs indicate prat the City will generate Per day. Generated waste vNttsln ft sphere of lnAusnce is not considered s19 IIII oltI dip $a Ilw flaiere of the limited seasond Uses os much as 350 torp of sadd waste Pet day. 11 the C1ty The County of I.a Argetee i pew oy responsib7ie far regional soMd meets *0 regWneniertfs of AS 949 by the year 2000. this p0dJC00n Woesld Presby be 190 tons per day. wade dNpoeal. WON Haat Dicirm Sar h disposed of In tour separate la►d ift The Canty h Pmmc y tryirp 10 egxsnd cqx= fy at eloltktg focfitiles and Is seacl* V kr Oddlbnal slice to Construct fac:itl WL County capaidly b d rdrd**4 Ad 949 mqukee etiMes to reduce amo rsb of waste staled for landilk by 25 pencsitt by 1995 and 50 present bV Me year 200M and requil cites fa Prepae'Source Rednelton and Recyciksg 6emenle' wiMtiri V** General Pion dOcun nta. AS 2707 regdrw CON 10 Poepatra'liosssefsold HQZQ1rd0U6 Waste E9erewt#in the General Plan docu mw* ae weiL S unmary of knMM Sigriiflcatt but mtilgabie CITY of DiAMGND BAR FINAL ENVIRONMENTAL IMPACT REPORT July 9.19" II -4 S. MITIGATION MONITORING Please see the Mitigation Monitoring Plan available under separate cover. CITY OF DIAMOND BAR DRAFT ENVIRONMENTAL IMPACT REPaRT f1f. PROJECT DESCRIPTION CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT .Ealy 9, i 991 A LUUJ z LLI (D i D. GENERAL ALAN GOALS Each of the main sections of the Diamond Bar General Plan contains broad philosophical goals, associated objectives, and specific strategies to implement different aspects of the General Plan. The following summarizes the goals and objectives of the new General Plan: PLAN FOR COMMUNITY DEVELOPMENT - LAND USE Goal l: Maintain a mix of land uses which enhance the quality of life of Diamond Bar residents. consistent with its desire to maintain its quality and distinctiveness as a planned community. Gaal 2: Manage land use with respect to the location, density and intensity, and quality of development in order to maintain consistency with the capabilities of the City and special districts to provide essential services, and to achieve sustainable use of environmental and manmade resources. Goal 3: Maintain recognition within Diamond Bar and the surrounding region as being a community with a well planned and aesthetically pleasing physical environment. Goal 4: Encourage long-term and regional perspectives in local land use decisions, but not at the expense of the quality of life for Diamond Bar residents. PLAN FOR CCMAMXRN 1Y DEVELOPMENT - HOUSWC Goal 1: The City should provide opportunities for development of housing suitable to meet the diverse needs of residents, and to support healthy economic development. Goal 2: Encourage adequate housing opportunities for all economic segments of the community, regardless of age, race, ethnic background, national origin, religion, famity size, sex, martial status, physical conditions, or any other arbitrary factors. Goal 3: Preservation and conservation of existing housing stock and maintenance at Prop" values and residents' quality of llfe. PLAN FOR RESOURCE MANIAGEMENt Goal 1: Create and maintain an Open space system which will preserve scenic beauty, Protect Important biological resources, provide open space for outdoor recreation and the enjoyment of nature, conserves natural resources, and protect public health and safety. Goal 2: Identity limits on the resources needed to support existing and future uses within the City Ot Diamond Bar and its sphere of Influence, and ensure that those resources are used witoly. PLAN FOR PIKE HEALTH AND SAFI TY Goal 1: Create a secure public environment which minimizes potentlaL los: of life and Property damage, as welt as social, econoMic, or environmental disruption resulting from natural and manmade disasters. CITY of DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT J* 9. t 992 111-4 Table 4-2 Exerting Land Uses (City-wide) Dale On reudenft Luft came from Me, CaUfontia Department of Fkmlco anti 1490 grow data. PtannuV NwwOrk also Cw4ucted a survey of mudt- unit to do m me sPecl'fic numb.n Ot unit by type, For rKm4 Fidenttaf uses, squon reef (3a. ".) of btdkkq area shown for exlatfrp coffamm d, offk* and busineu park uses wen calculated based on { >Of shopping Dente®. otnce pat&, and Industrld porb wi*Wn for odaft— data, see the Land Use Appwxsx of the Moster Rafb a ifti iftssuildkV am can be estimated based on Flow Mea of the Fife square ��'g area In aquae teef divided by fhe term ant (in teed. For example. awith 17.300 aquae feet on a 1 acre aft (43,50 square" has an FARof0.10 (17.300 divided by 43.5&)}, Locat 1000V Accumft � � on dltlk..ult okil* be4l ocusee am tlsoppirg senNr may supporta "W" of ccmnabaL Dale and typical budrwW u= Hawww fM fiowft FARa Can be ewaidend npresef"em" far �t0 PwPasn: Commemialc - D.24; Office - 0,30: and lklfirwn Park - 0.32 CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT Juhr 9. 1992 Table AI -4 Existing Land Use (by acres) EkWing Land uses Developed' Existing Total Single Family 4,512.3 4.512.3 Muhl -Family 440.1 440.1 Totcd Realdentlat 4,952.4 4,9524 Commercial 181.8 181.8 Comm./Office/Indust, 403.9 403,9 Parks/Open Space 464,2 464,2 TOM No"e6dentlal 1.866.9 1,866.9 Vacant Land 2,763.7 TOULL s 6,819.3 9,583.0— Dwmk)pod equob tokg MWXW VOCMV 2 TOMB @qA* MkWrrid Pkx rmwesidwift 4 CITY Of DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT .Jul'► 9. 1992 III.B Table W-6 (EAsting and Proposed laud Uses Comparison of Population and Employment LAND USES EXMMG PROPOSED RESIDENTIAL Single Family 12:589 19,157 Multi -Family 5,075 4,742 Total Housing Units 17.664 23,899 POpLdcdJm 1 53,672 72.414 NON-RESDENTWL Commercial Acres 1818 Office Business Park Square Feet Employees Acres Square Feet Employees Acres Square Feet Employees Parks/Recr/OS Acres Other Uses Acres Vacant/Open Land Acres CITY-WIDE TOTAL Housing Population Buildings Employees 1,901,000 3,042 138.5 2,293,000 4,680 83.6 1,165.000 1,553 464.2 998.8 2,736.7 17.664 units 53.672 people 5,359.000 sf 9,275 workers 183.5 1,919.010 3,070 192.7 3,190,387 6,381 76.4 1,064, 955 1,384 850.57 268.14 0 23,899 units 72,414 people 6,174,352 sf 10,835 workers Poprlatfan of propend UM eutketated by mUpfYkq the total number of unbs by the cuoreru rxrnb" of pennas per dwo" W*, based on prv*rdr ry I m amass and Deparmmo of Anave data. 2 Number of ever k"" eakna by rnuplp AV the buk kq x*mm kaolaQe *no Ow r wdm of enrpWIRM per xvuan foot. For Mxnond ear, KPXX* loot per en PkW" %"Iu are erftaled at 623 for comr4mlal, 490 for ofilce, and 730 for burr park. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT Jb* 9.1m Ili -10 z LU a. V) \ 2 � A § § zi z > IV. ENVIRONMENTAL ANALYSIS CITY OF DIAMOND BAN FINAL ENVIRONMENTAL IMPACT RePORT Jw19,199Z 2. IMPACTS Development of the City under the proposed General Pian will cause the modification of some portion of the remaining open lands in the City, which will result in changes to local topographic features. Although not all of the existing open lands will remain as open space, the proposed land use plan (including the sphere of influence) incorporates the provision for open space to remain (34 percent or 4,432.5 acres of the total area of existing open/vacant lands plus parks and agriculture), The proposed General Plan would minimize potential impacts to visual resources within Tonner Canyon by emphasizing open space uses (such as god courses and a conference center), and retention of existing low intensity recreational uses (Firestone Boy Scout Reservation). For additional data on the. extent of potential Impacts within the City or its sphere of influence, see the Issues and Opportunities portion of Section it -A an Landforms and Topography In the Master Environmental Assessment, 3. MrricATION MFASURE51 A major goal of the proposed General Plan is to minimize impacts to local topography and visual resources by preserving a significant amount of the existing vacant land as open space. Development on the remaining hillsides and open land will be required to use landtorm grading to match or simulate natural contours. Clustering of projects will be encouraged to preserve open space features Intact. Specific measures proposed to mitigate landform and topographic impacts are: LU: 1.5.1-1.5.2 protect open space resources 1.6.6 protect hillside areas 2.2.4 protection of exlsting views 3.2.3 landscape districts for major slope areas 3.3.1 incorporate open space into projects 3.4.1.3.4.5 landtorm grading techniques RM: 1.1.1-1,1.8 protection of ridgellnes, slope areas, and hilltops PM: 1.2.2 minimize hillside impacts Summary of Landform and Topography Impacts. Significant but mifrgable LU Land lire H HOUNIg RM Raow= Mwagwn" PHS Puha I WA and So" PV Pubrre swAm and 1 PM PlW*CA Mob" (Cr =*0oni CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT JW 9. 1 992 N-2 3. MMGATiON MEASURES Development within the City as well as within the sphere of influence is intended to be minimal under the proposed General Plan. This will minimize the amount of additional people introduced into this area, which also minimizes the degree of additional impacts from earth -related hazards. Specific measures proposed to mitigate geologic and seismic impacts are: LU: 2.1.1 respect environmental limitations PHS: 1.1.1-1.1.2 minimize geQlogiclseismic hazards Summary of Earth Resources (Geologic) and Seismic Impacts. Significant but mitigable C. DRAINAGE AND FLOOD CONTROL 1. Eamim SmNG The steep topography and other physical condiiions contribute to potentld local drainage problems. Runoff In the City is accommodated by three major natural drainages: San .lose Creek to the west, Diamond Bar Creek to the southwest, and Brea Canyon Creek to the souttlwest. The only area of the City with flooding problem: is atone the Reed Canyon Channel at Brea Canyon Road and Lycoming. However, the lands within the City of Industry adJacerrt to Diamond Bar, generally located west of the 57 Freeway from Temple to Lemon, also have potential flooding problems. While most of the backbone drainage system has already been installed by the County of Los Angeles, there are still a few links and improvements that have not been constructed yet, The City presently lacks a master plan of drainage, and any needed improvements would have to be installed by developers or the County. The sphere of Influence Is drained by Tonner Carryon Creek. This area presently has no major flood control Improvements and flooding can occur along the entire length of this natural stream channel. For addlffonai Information on local drainage, flooding, and flood control In the City or its sphere of Influence, see the Existing Setting portion of Section II -C on Drainage and Flood Contrni in the Master Environmental Assessment. 2. h&ACM Development wllftlln the City could expose future residents to a slight (incremental) threat from flooding. An increased risk of flooding could be expedenced by future employees In the business park area along Brea CarWon Road at Lycoming If the Reed Creak Charnel is not improved. Future development In Tonner Canyon could be subject to significant flooding it no improvements are made to the natural channels and drainage courses. For adcI land infomlatian on potential flooding Impacts In the City or Its sphere of Influence, see the Issues and Opportunities portion of Section II -C an Drainage and Flood Control In the Master Environmenfat Assessment. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT .lug► 9.199"! N-4 3. MMGAnON MEASURES Under the proposed General Plan, most major canyons and hillside supporting oak, sycamore, walnut, and riparian woodlands will be preserved. The Plan for Resource Management requires that development in hillside or other areas with native vegetation will be sensitive to and either preserve or replace native species. Techniques such as landform grading will also be used in developing the remaining hillside areas so that natural contours are maintained. Specific measures proposed to mitigate drainage and flood control impacts are: LU: 3.1.5-1.1.b establish Open Space and Park land use designations 1.5.3-1.5.2 inventory of open space commitments: identify open 1.6••6 space resources and funding mechanisms protect hillside areas 2.1.1 recognize environmental limitations 2.1.3 require spring plant surveys 3.3.1 include natural open space -in projects 3.4.1-3.4.5 hillside preservation RM: 1.1.4-1.1.6 preserve natural vegetation in hillside areas 1.2.1-1.2.4 protect biological resources PHS: 1.3.2 minimize fire hazards PM: 1.2.2 minimize roadway impacts to natural slopes Summary of Biological Resource Impacts: Significant but mitigable E. LAND USE The City occupies 9,583 acres (15 square miles) In the East San Gabriel Valley, and largely consists of medium and low density residentlal tracts. Housing areas are separated by various open spaces, with a minimad amount of supporting commercial, office, and business park uses near major roadways and freeway access points. The City has considerable open space and recreational resources. The sphere of Influence Is presently vacant except for the Firestone Reservation operated by the Boy Scouts of America, For additional Information on land utas within the City or its sphere of influence, see the Project Description section of this EIR or the Existing Setting portion of Section II -E on Land Use in the Master Environmental Assessment. 2. IMPActs- Ultimate buildout of the City will convert 1,913 acres of the exis#Ing 2.764 vacant acres (69 percent) to various suburban uses, primadlly housing. The remaining lands will remain as open space resources for City residents. Planned development of the several remaining Targe open space areas. including Tres Hormonal and the south end of "The Country', will ultimately change their overall character. However. this change need not be viewed as negative if they are sensitive to natural rasources and surrounding land uses. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT J0* 9,1492 IV_4 1.4.1-1.4.3 ensure adequate public facilities 2.1.1 adequate fiscal resources 2.3.2 disposition of existing public facility sites Summary of Land Use Impacts: Significant but mitigable F. AIR QUALRY 1. ExmwG SEmNG The entire south coast air basin. within which Diamond Bar is located, suffers from some of the worst air quality In the nation. Pollutants are not only generated locally within the east San Gabriel Valley, but are also transported downwind from the Los Angeles Basin. The primary pollutants of concern are ozone (oxidants) and nitrogen dioxide, which are mostly generated by vehicular exhaust. the number of first stage smog alerts has decreased dramatically from the early part of the decade, both for the Pomona area as well as the entire basin. However, local ozone levels have still exceeded State standards on over 100 days during each of the past three years. Local topography, climate, wind. and air movement patterns tend to concentrate air pollutants along the freeway corridors and especially In the Diamond Bar area. Several local intersections, including Grand Avenue at both Diamond Bar Boulevard and Golden Springs Drive. experience significantly elevated levels of air pollutants during peak driving hours. For additional Information on local and regional air quality, refer to Section it -F on Air Quality In the Master Environmental Assessment. 2. I&VACM Ultimate buildout of the City and its sphere of Influence will add significant amounts of air pollutants Into the regional air basin, mainly from Increased vehicular exhaust (mobile) and stationary sources. In addition, construction activities during building will add to the local pollutant load, mainly in the form of fugitive dust and construction vehicle exhaust. An air quality analysis indicates that buildout will generate 44.26 tons of air pollutants each day, which represents 0.6 percent of the total air basin emissioru by the year 2000 (8,036 tons/day). For data on the extent of air quality impacts within the City and its sphere of influence, see the issues and Opportunities portion of Section 11-F on Air Quality In the Master Environmental Assessment. 3. MtTIGAWN MEANXaM The City wiN Implement ad feasible measures and programs required by the Air Quality Management Plan regarding carpooling, ridesharing, etc.. as shown in the Air Quality Appendix. The relocotlon of the Air Qualify Management District offices to Diamond Bar wIu offer the City unique oppDrtcsrlltles to explore new and innovative programs to Improve air quality. Specific measures proposed to mitigate air quality Impacts within the City and its sphere of influence are: LII: 1.3.21.3.8 provide commercial along freeway to minlmlze travel and employment generating US" 2.1.1 recognize environmental limitations 2.1.2 incorporateenergyconsewatlantechno!ogles into now development 3.3.4 provide pedestrian circulation within new development projects CITY Of DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT Jud► 9. 1992 IV -A There ore several major focal roadways that generate (maximum) 65 CNEL levels beyond the right- of-way. These include Brea canyon Road (144'), Colima Road (1251, Diamond Bar Boulevard (1211, Grand Avenue (1071, Pathfinder Road (891, Lemon Avenue (781, Golden Springs Drive (771, and Sunset Crossing (35). The only other major sources of local noise are the railroad lines along the western boundary of the City and infrequent urban sources (dogs barking, airplane overflights, etc.) For additional information on local noise, see the Exiating Setting portion of Section 11-G on Noise in the Master Environmental Assessment. 2: IWACTs Buildout of the City will Incrementally increase local noise levels primarily from mobile sources, as local traffic volumes increase. Localized noise levels will also increase during construction activities. A noise analysts of local roadways was performed by Endo Engineering; At buildout, local noise levels along major roadways will generally increase. The assumptions and factors used to arrive at these noise figures are provided in the Noise Appendix. While these noise levels are not significantly adverse, they could be potentially adverse it sensitive land uses were allowed to be built where exterior CNEL noise levels exceeded 65 dB. Development in the sphere of influence, as proposed in the General Plan, will produce only minor noise impacts from vehicular and conference uses. Activities related to operation of the gaff courses will not create significant noise levels. Construction acttvities may temporarily Increase local noise levels, although there will be no residents in the canyon to be impacted by the additional noise. These impacts will be short-term and are not considered significant. 3. M iTICATM MEASUM Development of the City under the proposed General Pian will minimize potential noise impacts. The Plan for Public Health and Safety provides guidelines for adequate setbacks, consideration of noise in site and building design, etc. Specific measures proposed to mitigate noise impacts within the City and its sphere of influence are: PHS: 1.10.1 require site-specific noise studies within identified 65 CNEL noise corridors 1.10.2. 1.10.5. require noise attenuation within identified 65 CNEL noise corridors 1.10.3 incorporate noise considerations Into the CEQA process; define 'significant" noise impacts for individual projects 1.10.4 incorporate noise standards for new development into Development Code 1.10.6 edabilsh General Plan review for potential noise increases 1.10.7 appty measures to protect against excessive noise 1.10.8 establish noise standards Summary of Norse Impacts. Potentially significant but mifigable CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT !. SOCIOECONOMICS (HOUSING) The City of Diamond Bar provided quality affordable housing for the Los Angeles basin during the 1960's and early 70's. As land value increased, especially in hillside areas, housing became more expensive and supported affluent (upper income) families. Over the 30 years of its development history, Diamond Bar has become a modest -sized and ethnically diverse community, Preliminary 1990 census figures indicate that 47 percent of the City's population (53,672) Is now represented by minorities, primarily from various Asian culture, Local housing is primarily single family detached. although 29 percent of the 17,664 total units are multi-famity units. For additional information on socioeconomics. refer to Section II -1 on Socioeconomics in the Master Environmental Assessment. 2. IMPACU Development of the City according to the proposed General Plan will increase the City's population by 18,742 residents, up to 72,414 (see Table 111-6 of the Project Description). The amount of housing will increase to 23,1399 units over the existing 17,664 units and its compositlon will remain predominately single family (80 percent). For additional data on the extent of Potential population or housing impacts within the City. see the Issues and Opportunities portion of Section 11-1 on SoctOec"mmlcs in the Master Environmental Assessment. CITY ole DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPoRt it* 9.1M N-12 J. CRIME AND PREVENTION SERVICES EXtZNG SEMNG Crime in Diamond Bar is fairly low, with protective services provided by the Los Angeles County Sheriff's Department, The City is served out of the Walnut -San Dimas Station by 29 deputies and 18 patrol vehicles. The County maintains a service level of 0.5 officers per thousand residents for Diamond Bar, with an average emergency response time of 4.5 minutes. The County currently considers 1.4 officers per thousand residents to be adequate for suburban protective service, with 2 officers considered to be an optimum staffing level. The City will need additional protective services as H grows. although it may not need additional facilities within the City limits. The Firestone Boy Scout Ranch within the sphere of influence presently has private security. Far additional information on crime and protection services, refer to Section II -J on Crime and Prevention Services in the Master Environmental Assessment. 2. ImPA= Development of the Clty under the proposed General Plan will increase the number of residents and workers, which will create a need far additional protective services. Table IV -J. 1 projects future protective service needs of the City based on different staffing levels. According to the service level recommended by the Sheriff's Department (1.4 officers per thousand residents), the City would require 75 patrol officers at present (compared to 29 officers at present). This same service levet would require 101 officers to serve the City at buildout based on a population of 72.414 residents. If the City were to maintain Its present staffing ratio (0.5 officers), the City would need 36 officers at buildout. The Sheriffs Department has indicated it can serve the anticipated crime protection needs of the City at buildout without additional facilities (McCowen 1990). Development of the sphere of influence under the proposed General Plan would be minimal, although there would be some increased need for protective services as structures and uses are developed in the canyon. For addltlonat data on the extent of potential law enforcement Impacts within the City, see the Issues and Opportunities portion of Section 11-J an Crime and Prevention Services in the Master Environmental Assessment, 3. MmGABON Nis The Diamond Bar General Plan seeks to minimize the potential for increases in crime and the need for additionot protective services, Table IV -J-2 vinnx es the lighting standards recommended by urban planning professionals to accomplish goad Ughting that Is a key ingredient of defensible space. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT .Jahr 9.199T N-1 d The recreofianal uses proposed in the sphere of influence will require few security services, which will significantty reduce the potential for increased County protective services. Specific measures proposed to mitigate protective service impacts within the City and its sphere of influence are; LU: 2.3.1.2.3.2 review of Public service and facility impacts for new development; mitigation requirements PHS: 3,5.1.1,5.2 minimize potential for criminal activities PSF: 1.2.1-1.2.2 financing of new public services and facilities " 2.1.1-2.1.4 sufficient municipal income to support services and facilities Summary Of Crime Protection Services Impacts. Potentially significant but mitigable K. FIR9 HAZARDS AND PROTECTIVE SERVICES Diamond Bar faces a significant potential threat from wildland fires for "many reasons. For the developed portions of the City, the Insurance Service Organization (ISO) gives the developed portions of the City a rating of 3, which Is considered good for urbanized areas. The sphere of influence and the undeveloped hillsides in the City that are adjacent to Tanner Canyon do not presently have (or need) these some levels of protection. Fire protection services for the area are presently provided by the Los Angeles County Fire Department, which maintains three stations In or adjacent to the City. County stations 114, 120; and 121 are fully equipped and staffed. For additional information on the threat of fire and fire protection services, refer to Section II -K on Fire Hazards and Protective Services in the Master Environmental Assessment. 2. IMPACM Analysis of available service level data Indicates that the City will probably not need an additional fire station. aNhough any significant development In the sphere of Influence area might require additional protection service= and/or facilities. The City is presently investigating the potential for forming a fire protection service cooperative with other local agencies. For additional information on the threat of fire and fire protection services, refer to Section it -K on Fire Hazards and Protective Services In the Master Environmental Assessment. CITY of DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT JUIV9. tit. N-16 3. N"GAMN MEASURES The Plan for Public Health and Safety of the Diamond Bar General Pian seeks to minimize threats to public health and safety, and establishes the need for adequate access to emergencyservices and facilities for all City residents, Specific measures proposed to mitigate potential health and emergency service impacts within the City and its sphere of influence are - LU. 2.3.1-2.3.2 review of public service and facility impacts for new development; mitigation requirements PNS: 1.6.1.1.5.2 provide adequate emergency services; investigate feasibility/need for a major medical facility in the City 1.7.1-1.7.5 emergency preparedness PSF: 1.2.1-1.2.2 financing of new public services and facilities 2.7-1-2.1.4 sufficient municipal income to support services and facilities Summary of Health Emergency Service Impacts. Potentially significant but miligable M. HAZARDOUS MATERIALS 1. Ewsm SeTm Hazardous materials presently create a potential threat to the City. The primary threat facing the City would come from a major traffic or train accident involving spillage of hazardous or tO)dc materials. There are many industrial or other businesseswithin the City or in the nearby City of Industry that treat, handle. Or store hazardous materials. As the area continues to grow and environmental regulations become more strict, the likelihood of an accident or the potential for illegal dumping Increases. The Los Angeles County Fire Department maintains Response Teams to handle emergencies involving these materials, but the City must deal with the local implications of hazardous wash. According to the provisions of AB 2707, the City Is now required to develop a "Household Hazardous Waste Element" In the General Plan. For additional information an hazardous materials, refer to Section II -M on Hazardous Materials In the Master Environmental Assessment. 2. WACM As the City develops under the proposed General Plan. there will be very little increase in the amount of fond dedicated to business pOWIndustrlal cues, which represent the greatest potential for incidents involving hazardous materials. However, the Increase In focal population and other businesses wig also Increase the potential for accidents or spills Involving hazardous materials. For additional data on the extent of potential hazardous material impacts within the City. see the Issues and Opportunities portion of Section II -M on Hazardous Materials In the Master Environmental Assessment. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT .b* 9. 194! N•18 2. IMFACM Development of the City according to the proposed General Pian will increase the need for additional active and passive parkland, as well as additional open space areas. Based on the State park standard of 2.5 acres per thousand residents, the City will need a total of 181 acres of developed parkland. Although the City potentially has this much land available for recreation, it has authority only over 135 total acres of parkland (60 developed and 75 undeveloped), including proposed parks that are not built yet. In addition, these parks are not connected by a multi -use trail system (hiking, bicycling, riding, etc.) so alternative access other than driving Is limited. For additional data on the extent of potential impacts within the City, see the Issuesand Opportunities portion of Section II -N on Recreation and Open Space in the Master Environmental Assessment. 3. MmGAMN MEAWAS The City is developing a master pian of parks that will identify additional needs, potential sites, and planned facilkNes. as well as funding sources and provisions to interconnect all of the City parks via a City-wide trail system. This plan will also take into account open space needs and resources, and integrate them as passive parks into the master plan of parks. The Plan for Resource Management places the protection of open space in the City as a major priority. Specific measures proposed to mitigate recreation and open space impacts within the City and its sphere of influence are; LU: i .1.5-1.1.6 establish open space, Park, and agriculture designations 1.1.9 1.4.2 establish joint use schcoWparks 1.5.1 maintain inventory of open space commitments 1.6.6 protect hillside areas 1.7`1-1.7.2 community gathering places; public information of community events 2.1.1 respect naturd resource limits 2.2.4 protection of existing views 3.2.3 landscape disMcts for major slope areas 3.3.1 incorporate open space into projects 3.4.1-3.4.5 landform grading techniques and preserve hillside areas RM: 1.3.1-1.3.9 maintain City-wide park and open space system PSF: 1.2.1-1.2.2 financing of new public services and facillfies 2.1.1-2.1.4 sufficient municipal Income to support services and facilities PM: 2.1.9-2.1.12 develop bicycle and equestrian trail: 3.1.5 develop pedwWan access routes Summary of Recreation and Open Space Impacts,• Potendialiy significant but milfgable CITY Of DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT Jh* 9,1"2 N-20 P. WATER 1. E=nNG SEMNGr Water is provided to the area by the Three Valley Water District but locally distributed through the Walnut Valley Water District. Ultimately, almost all iocal water districts receive most of their imported water (other than groundwater) from the Metropolitan Water District (MWD). As a result of the ongoing State-wide drought, now in its third year, the MWD has restricted local water supplies by 25 percent through the imposition of surcharges on water supplied in excess of these levels. A Master Plan of Water is being prepared by the Walnut Valley Water District which will estimate a buildout population for Diamond Bar on the order of approximately 75,000 residents, which is higher than the estimated buildout of the City. The degree to which the modest amount of growth projected by the General Plan can be accommodated by the local water districts will depend on the regional availability of water. As shown in Table IV -P-1, the City presentty consumes 10 mlilion gallons of water each day, based on current local consumption figures. However, it should be noted these figures may be somewhat high as they do not discount water use for residents that also work within the City. The sphere of influence presently consumes a small amount of water for the campground and related uses. These water figures do not include reclaimed wastewater, whkh Is also utilized in Diamond Bar., At Present, various uses in the City 350,000 gallons per day, although peak consumption can reach 1 million gallons per day. For additional information on water use in the City. see the Existing Setting portion of Section II -P on Water Resources in the Master Environmental Assessment. 2. IMPAM One of the fundamental long-term constraints for both urban and rural development is the availability and quality of water. As throughout Southern California, water availability has become, and will remain, a major resource constraint facing Diamond Bar. At buildout, the City will consume approximately 13.4 million gallons of water each day, based on currentconsumption figures, as shown in Table W -P-1. Although water is presently available in sufficient quantities and of sufficient quality to support the City, thea are no long-range plans established to accommodate growth in Southern California should the State-wide drought continue. Until such time as specific plans are established, the availability of water is a potential but significantly adverse environmental impact that cannot be mitigated below a level of significance, even with the implementation of available mitigation measures. For additional data on the extent of potential water impacts within the City and its sphere of Influence, see the Issues and Opportunities portion of Section II -P on Water in the Master Envirormental Assessment. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPAcT REPORT JWvO. f"2 n/_0142 A. WASTEWATER I . ExWNG SEMNe The County of Los Angeles provides wastewater conveyance and treatment through County Sanitation District No. 21. Wastewater treatment is provided by the Joint Water Pollution Control Plant in Carson. Although much of the physical sewage infrastructure (pipelines) appear in generally good condition, there have been repeated failures of the pump stations needed to Ifft flows #o the regional collectors. Table N -a-1 estimates the current generation of wastewater from Diamond Bar. Present uses In the sphere of influence are minimal, and the smaii. amount of wastewater Is accommodated with a limited septic system or storage/removal. For additional information 'on sewer service in the City, see the Existing Setting portion of Section II -O on Wastewater in the Master Environmental Assessment. 2. IMPActs Buildout of the City will increase its production of wastewater from 4.47 million gallons per day to 6.9 million, based on present generation rates (see Table IV -Q-2). This amount of additional sewage can be conveyed and treated, based on existing and anticipated facilities (LACSD 1990). Over the long-term, sewer service to Diamond Bar depends on the County Sanitation District maintaining its present service levels, existing treatment facilitlos, and completion of planned improvements to accommodate growth throughout the East San Gabriel Valley. For acidmonal dais on the extent of potential sewer impacts within the City see the Issues and Opportunities portion of Section extent on Wastewater In the Master Environmental Assessment. CITY Of' DIAMONO BAR FINAL ENVIRONiMENTAL IMPACT REPORT tel► 9, 1 M N-24 Table N-0-2 Daily Sewage Generation-Bulidout I LAND USE UNftAREA 3 PERSONS 3 RATE 4 SEWAGE (gallons/day) (gallons) Single Family 19.157 units -- 260 per unit 4.98 million Multi -Family 4.742 units -- 156 per unit 0.74 million Subtotal 23,899 units 72.414 5.72 million residents Commercial 1.92 MSF 3.070 ISO per TSF 0.29 million employed office 3.19 MSF 6.381 250 per TSF .80 million employed Bus. Park 1.06 MSF 1.384 25 per TSF 0.02 million employed Subtctd 6.17 MSF 10,835 158 pair TSF 1.11 million empbyed BIADOUr TOTAL 6.83 milHan Sound: bared on data from Los AfV*Mg Courny SWftfion 0fsfrlct No. 21 (Yoshida 1990). 1 E*" CNV Wnlh" Dow not knkrde dwelopmertt in ft sPtltrre o! frtfk,NncR 2 SF R square feet T s+ ituwsand M w mftm 3 Nmik r d uNb *rM 3.03 pe- al pa WA oocoreftrp to urrus NNr*L Foxe wnpk"" of afto , boMd on Ixr+s"rts ratlot of empty per iquan foot (erre SaCffpn Yl. Project Dmcrtptl)n for meftlod 4 Rah" from LACSD 21 two TdWe M -G-1 in MasW twin AnenywL CITY OF DtAMoNo BAR FINAL ENVIRONMENTAL IMPACT REPO -RT July► % 1942 N-26 In addition, hazardous wastes are becoming a major public health concern. To deal with this concern, the newly -created California Integrated Waste Management Board noW mandates that cities and counties must prepare Household Hazardous Waste Elements in their general plans, according to the provisions in AB 2707. For additional Information an solid waste within the City and its sphere of influence, see the Existing Setting portion of Section 11-R on Solid Waste in the Meister Environmental Assessment. Table IV -R-1 EXis#ing Solid Waste Generation (PoundslDay) LAND USE PERSONS OR' POUNDS PER PERSON DAILY WASTES EMPLOYEES 1 OR EMPLOYEE 2 Residential Non-Resid mAdi 53,672 persons 7.8 418,642 Commercial 3.042 employees 10.0 30.420 Office 4,680 employees 22.5 105,300 Business Park 1,553 employees 15.0 23,295 TOTAL 577,657 (289 tons) Sauer Daft adltrsted Mom son SopKnoklo and LCs Ang" County Solid wash MWagWnw# pkM 1989. Flom Urban DeciA n Systems kw. 1990. Derhvd rtom cm olysis of both San Seffxxdka and Las Angel" County Plam sum of and •othu a unckwft& ecrttrgWkK 2. IMPACTS At buildout. it Is estimated the City could generate as much as 379.9 tons of solid waste, as shown In Table M -R-2. This represents a 31.5 percent Increase over existing production. However, this estimate Is based on existing waste generation rates, which should be considerably less as the provisions of AB 939 are Implemented. In addition, the existing generation rates are particularly high for office uses (22.5 pounds per employee). Within Diamond Bar, it Is likely a substantial portion Of uses within offbe areas wW be commercial uses, as Is the case In many commercial office areas at present. I the City meets the requirements of AB 939 by the year 2000, Diamond Bar's production of solid waste would probably be an the order of 190 tons per day (50 percent of 380 tons). which Is actually 34 percent lower than the existing production of solid waste from the City. In addition. development of the sphere of influence will generate an Incremental amount of wastes, although a large percentage of these would be Iandscoping clippings from the golf courses. Composting of some or all of these wastes would substantially reduce solid wastes produced by the sphere arem The master development plan for the sphere area will address local and regional solid waste Issues. For addltional data on the extent of potential solid waste impacts. see the Issues and Opportunities portion of Section II -R on Solid Waste In the Master Environmental Assessment. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT .xuty 9.1992 N-28 PSF: 1.1.1 provision of adequate services, including 1.1.5 adequate solid waste disposal systems 1.2.1.1.2.2 financing of new public services and facilities 2.1.1-2.1.4 sufficient municipal income to support services and facilities Summary of Solid Waste Impacts: Signfflcanr but mftigable S. ENERGY SYSTEMS Ex=Nc SEMNG Residents and land uses within Diamond Bar presently consume various types of energy, primarily electricity and natural gas. To estimate the amount of energy use in the City, consumption figures contained in the Air Quality Handbook for Environmental Impact Reports. published by the South Coast Air Quality Management District (1984 were applied to existing land uses. This analysis was performed by Endo Engineering, as part of the Air Qualify study. The assumptions and values used in this study are provided in the Air Quality Appendix. Using these values. it is estimated the City presently consumes 180 million kilowatt-hours (kWh) per year of electricity, or about 494,359 kilowatt- hours per day. Of this, approximately 60 percent Is from residential use, while the remainder Is from commercial, office, and Industrial uses. It is also estimated that the City consumes approximately 1,463 million cubic feet of natural gas per year, or 4 million cubic feet per day. Of this, almost 85 percent Is from domestic (residentiaq use, compared to only 15 percent for non-residential use. These estimates are based on regional consumption figures as provided by the Southern California Edison Company and Southern California Gas Company (see Air Quality Appendix). Land uses in the sphere area consume negligible quantities of energy, except for times of high use at the Firestone Gay Scout Reservation. Several major energy faculties, Including regional alactric and natural gas transmission lines, are located within the City, and several major electrical lines crass the sphere area. For more information on energy consumption and facilities within the City and Its sphere of Influence, see the Existing Setting portion of Section II -5 on Energy Systems in the Master Environmental Assessment. 2. thVACM At buildout, the City will consume addmonal quantities of energy. Based on current consumption rates. future land uses in the City will consume almost 2.05 million kilowatt-hours of electricity each year, or 562.798 kWh per day. This represents an increase of 12 percent over existing consumption. In addition, the City wiN consume 1,934.5 million cubic feet of natural gas each year, or 5.3 million cubic feet per day, this represents an increase of 25.5 percent over existing consumption. These estimates are based on the air quality analysis prepared by Endo Engineering (see Air Quality Append4 Future development in the sphere area will consume additional, minor quantities of energy. It should be noted that energy conservation has become an Important concern in many communNEas, including Dlamond 11m, and it Is likely that consumption rates wiN be considerably lower in the future ..For additional data on the extent of potential energy impacts within the City and Its sphere of Influence, see the Wus> s and Opportuntfies portion of Section II -S on Energy Systems in the Master Environmental Assessment. . CITY OF DIAMOND BA -R FINAL ENVIRONMENTAL IM/ACT REPORT -1* 9.1992 N_zn arterials. and numerous smatter residential streets in turn feed into these collectors. Figure (V -T•1 shows the existing local street system. As part of the Circulation Element, the OKS Associates report provides a complete description of the existing road conditions (DKS report pages 9 to 66). Figure IV -T-2 shows the existing traffic volumes on local streets. ()KS Associates estimates that existing land traveled (VMT). Table IV -T-2 contains existing traffic volumes. uses in the City generate 347,542 average daily trips (ADT) and a total at 5.033,549 vehicle miles The DKS Associates report analyzed 31 existing Intersections using the Crlticai Movement Analysis procedure and found fire intersections that were operating at Level Of Service (LOS) E or F (poor to very poor) during both the peak morning (AM peak) and peak afternoon (PM peak) times, and four additional Intersections that were operating at LOS E or F during just the PM peak time. The conditions at these intersections are described In Table IV -T-1 and summarized in Figure IV -T-3. Through a local windshield study, the DIGS study determined that these congested conditions are caused mainly by commuter traffic, meaning non -local drivers that use local streets as "short-cuts, to avoid freeway congestion (OKS Report pages 47 to 58). For example, commuter traffic on Diamond Bar Boulevard reached 22 percent of the peak PM traffic south of Pathfinder Road, while commuter traffic on Grand Avenue east of -Diamond Bar Boulevard reached 42 percent during the PM peak. Present truck routes in the City include Lemon and Brea Canyon north of Colima, Colima Road between Lemon and Brea Canyon, Lycoming west of Lemon, and Diamond Bar Boulevard from the 60 Freeway to Sunset Crossing. For more Information on circulation within Diamond Bar, see the Existing Setting portion of the Draft Clrculation Element prepared by OKS Associates. . The sphere of Influence has access off of the 57 Freeway via the Tanner Canyon exit, and Is served by a rural paved road of variable width with minimal traffic at present. Public transit service is currently avcWoble through the Los Angeles County Rapid Transit District (RTO) along Diamond Bar Boulevard (Route 490) and Golden Springs Drive-Callma Road (Route 482). Catfraru also maintains two Park and Ride facilities in the City adjacent to the57 Freeway, Passenger rag service is available from the Amtroc stations In Pomona and Fullerton. VA the City, only two roadways (Diamond Bar Boulevard and Golden Springs Drive have Class III bicycle routes, meaning that the bicycle route shares the roadway with vehicles. Only Golden Springs Drive north of Diamond Bar Boulevard presently has a Class U bicycle lane, which Is separated from the travel lanes by a painted line with signs to Inform motoddL CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT J* 9.199? 1V_19 Table (V -T-2 Us ling Traffic Volumesl ROADWAYILOCAnON E7 =WQ S7 FRUWAY north of Sunset Crossing 135,008 of Grand Avenue 226.0W north of Pathfinder Rd. 184.000 north of Brea Canyon Cutoff 182,000 60 FRUWAY west of Brea Canyon 173,000 at Grand Avenue 226.E at Golden Springs Drtve 147.000 eau Of PhilUPS Ranch Rd. 141.000 GRAND AVINt1I east of Diamond Bar Blvd 19.700 OW of Golden Spring; or. 24.700 west of Golden Springs or. 27.400 DIAMOND W BOUL1VARD South of Temple Avg. 16.700 north of Sunset Grossing 18,600 north of Grand Avenue 24.400 south of Grand Avenue 31.000 north of Pcthfindw 24.200 sotdtf of PaMflndw 27.000 Gast M Brea Canyon RoW 17.400 OMIT! SPI1010 /000MA ROAD nahh of 60 Freeway 101600 nOM of Grand Avenue 2M700 south Of Grand Avenue 19,700 0" of Brea Canyon 19.300 west of lemon Avenue 191800 M1MMIM ROW eat of 57 Freeway 2x200 west of 37 Freeway 14,600 Sou m OIQ Amodahs (1991) 1 aesGrw Sunset Crosskq not open hb City Of hduOy and no MgW al roadway Rough TOMW Canyon. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT jilt' 4. 1002 .. ^ . n 21 Z =i cn Lu N Z O CL U r Q LL. _ c 1 ` �-- z LU C� z cn X u� n 21 Z =i 2. IrMPAM As part of the Draft Circulation Element, US Associates prepared a Travel Forecast Model to estimate future intersection and roadway impacts in Diamond Bar. According to the DKS model. buildout of the City will incrementally increase traffic on local roadways as well as routes that provide regional access. However, most of the anticipated future traffic will result from development outside of the City limits, primarily from areas to the east. Development in areas such as Chino Hills will significantly increase traffic on local streets, creating more congestion at local intersections (LOS E and F) that already exceed an acceptable service level (LOS D), while also causing more local intersections to exceed this standard as well. For additional data on the traffic model, refer to section 4 of the DKS Associates irafflc study. 3. MWAT}ON MEASURES The Plan for Physical Mobility of the Diamond Bar General Plan will Incorporate applicable portions of the los Angeles County Congestion Management Plan as required by AB 179 1. This plan outlines roadway and other physical improvements needed to meet regional circulation needs. At present. none of the roadways identified by the County as part of the Congestion Management network are within Diamond Bar. However. Diamond Bar Boulevard and Grand Avenue may receive further study tot incorporation into this plan. Further action In this regard could result from annual monitoring and refinement of the Congestion Management Plan. The Plan for Physical Mobility also includes provisions for Transportation Demand Management. which are methods to reduce regional traffic that can be Implemented at the local (City) level on new projects and programs (such as carpooling. public transit, bicycle racks at work, etc.). The City of Diamond Bar will Implement appropriate Congestion Management and Transportation Demand Management plans as required by the Los Angeles County Transportation Commission as well as applicable regulations of the South Coast Air Quality Management District and the Southern California Association of Governments, as outlined in the Circulation portion of the Plan for Physical Mobility as adopted by the City of Diamond Bar. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT J* v. t m N-38 V. ALTERNATIVES CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT 11aso 1009 Diamond Bar Genual Plan Environmental Impacts June 23, 1992 City Council Land Use Map Environmiontof Topic June 30. 1992 Land Use Map _ Londforrns and TopopraPhy Increased Earth Resources and Sefsrmcry Increased Drainage and Flood Control Increased Bfotogf Resources Increased Land Use Dfacreased Air CuaAfy► (tont per day) 44.26 tons per day No" Decreased Culturd Resources Increased Sadoeconomia (No. of dwelling unm) 23.x99 dwefikxl unRs Crime and PreverMfon Servicer (No. at otffcers) 101 officers (minimum) Fin fian%hj arta Protective Services fnareased Medth and &Regency Servitor Increased Fkzardous Ma«lide Decreased ReefrtaM and Open Space (A� 181 acres needed Educational Semaea (K-1 2 students) 14.578 students N yov gooks) 106,621 volumes (Maian gotlom Per dais) 13.4 million gpd Wastewater (muton gatlaru per day) 6.8 nt tk n gpd sous Waft (tors per day) 379.9 tom per day Energy SY#WM Electricity (kwtVday) 562.798 kWNday Naftxd Gas (Cubic 5.31 mWon cffday food" Clrcuiaflon Avow" da*f ftft 471.174 ADT Vehicle mitis travelled 6,172.379 VW e CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT July 9,199 2 1. No PaWEcT ALTERNATNE The first aifernattve, the "No Project" Alternative, is required by CEQA. In this EIR, the "No Project' Alternative has been defined as maintaining the presently existing land uses and buildout assumptions, and were obtained from the Master Environmental Assessment for the Diamond Bar General Plan (July 1991). This alternative does not Inciude provision for a regional roadway within Tanner Canyon, the City's sphere of influence. 2. MEMM DeaW ALTERNATIVE Alternative 2, the Medium Development Alternative, would allow more housing units in the City (as compared to the proposed General Pian) by increasing the development intensity on remaining vacant and open lands. In addition, commercial and office development would be increased in comparison to the General Plan Alternative. This attemative also does not include provision for a regional roadway within fanner Canyon. 3. MA7aharM DENSrIY ALTERNATIVE Alternative 3, the Maximum Development Alternative, includes the most intense land use and development options, converting much of the remaining open land 110'10w to moderate intensity urban development, in comparison to the General Plan AHernatt4 Several areas would be developed into mixed-use areas, and a mobile home park would be relocated to allow development of a business park. In addition, several small condominium developments and some church parcels would be designoted for commercial development, and some older single family residential areas would be designated for higher IntensHies (from 4-5 units per acre to 4 units per acre). This alternative includes the provision for a regional roadway in Tanner Canyon, the City's sphere of influence. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT JY 9, 1992 W-02 09 O a LU OG U Table V-4 Comparison of General Plan Alternatives bV Percent of Land Area' sourew AlternaMves Report (see Land use Apperx" DIM" - no project attem we, GP Alternatlw = the proposed prom Allerrrative 2 - rnedkm devolopffmft Alhmattve 3 - rnamdrtwtn develaprnerM 2 Developed equcb total n*ws vacant 3 Tose! equab devebped pias vo=W Alternative 2 1 Alternative 3 64.4 EAding Existing Gen. Plan Land Uses Developed Total Alternative Single Famity 66.2 47.1 61.7 Multi-Famity 6.4 4.6 5.0 Total Residential 72.6 51.7 66.7 Commercial 2.7 1.9 2.9 Comm./Office/Indust. 5.9 4.2 8.3 Parks/Open Space 6.8 4.8 13.8 Total Non-Residenfial 27.4 19.5 33.3 Vacant Land 0 28.8 0 TOTAL 100.0 100.0 100.0 sourew AlternaMves Report (see Land use Apperx" DIM" - no project attem we, GP Alternatlw = the proposed prom Allerrrative 2 - rnedkm devolopffmft Alhmattve 3 - rnamdrtwtn develaprnerM 2 Developed equcb total n*ws vacant 3 Tose! equab devebped pias vo=W Alternative 2 1 Alternative 3 64.4 65.2 4,4 5.6 49.9 69.6 � b 3.7 8.4 11.2 10.4 8.2 30.4 30.1 0 0 100.0 100.0 CITY OF ©IAMoND BAR FINAL ENVIRONMENTAL IMPACT REPORT July) 9.1991 V.A C. ENVIRONMENTAL EVALUATION OF THE ALTERNATIVES In this section, the impacts to each environmental topic are evaluated for the three alternatives described above and then compared to the impacts resulting from the General Plan Alternative, This comparison is accomplished, where feasible, by comparing an actual numerical impact (e. g., total amount of wastewater generated under each alternative). Where numerical evaluations are not possible, the comparison is accomplished by using the term "increased' to refer to impacts that will be greater or more negative than the proposed alternative, while the term "decreased" refers to impacts that are more beneficial or less negative. Some impacts may be both positive and negative relative to the proposed project (referred to as "mixed"), while others may be essentially the same as the proposed project. Environmental impacts generated by each alternative are compared and contrasted in Table V•)1 at the end of this section. 1. LvrDFORW AND ToPoGwi-y Development in the City under either the Medium Development or the Maximum Development A ternathves would result in an increase in the total amount of development (both residential and non-residential), which would thus require more grading. As a result, more landforms and topography would be offered under both of these alternatives. In addition, less land would remain In the Open Space Land Use Category. Under the No Project Alternative, no further development would occur, which would result in the least amount of landform and topographic alteration. Level of Impact Compared to the Proposed General Plan. No Project: Decreased Medium and Maximum Development: Increased 2. EAM Rmou nss AND Sestitrcnv Development under both the Medium and Maximum Development alternatives would result in higher buildout populations. and the Maximum Development Alternative would also have a higher number of employees working in the City as well. Therefore, overall, more people would be exposed to potentlal seismic impacts under these two alternatives. Under the No Project Alternative, the fewest number of residents and employees would be exposed to potential seismic impacts. Levet of Impact Compared to the Proposed General Plan: No Project: Decreased Medium and Maximum Development: Increased 3. DRW4GE AND FLOOD CoNnxx Most of the City Is protected from potential flooding; however, under the Medium and Maximum Development ofterna ives, more residents and employees will Ove or work In areas that are presently unprotected from flooding (e.g., Tonner Canyon). Therefore, flood control facilities would be required In these areas. Under the No PrOjeCt Alternative, no further development In undeveloped areas would be akmed. and population and employment levels would remain the some. Therefore, no addittonat people would be exposed to flooding potentlaL However, under the No Project Alternative, no addltlonat needed flood control fccllitiei would be Implemented either. Level of Impact Compared to the Proposed General Plan: Na Project: Mined Medium and Maximum Development Increased CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT July 9, 1992 V-8 The noise levels at major intersections within the City of Diamond Bar are included in the Noise Appendix and summarized below. According to the noise analysis performed by Endo Engineering, noise levels under the Medium and Maximum Development alternatives will be incrementally higher than the proposed project, due to the higher number of vehicular trips generated. Likewise. the lesser number of vehicular trips generated under the No Prcject Alternative will rasa!# in lower noise levels. Level of Impact Compared to the Proposed General Plan: No Project: Decreased Medium and Maximum Development: Increased 8. CuLTUM R6ouRcm Further development in the City of Diamond Bar will likely occur primarily in areas of undisturbed land. - Therefore, under the Medium and Maximum Development alternatives, which will result in increased development in comparison to the General Plan Alternative, potential Impacts to cultural resources will be correspondingly increased, likewise, under the No Project Alternative. development will remain at its present level, and therefore, the potential impacts to cultural resources will be decreased In comparison to the General Plan Alternative. Level of Impact Compared to the Proposed General Plan: No Project: Decreased. Medium and Maximum Development Increased Specific data on the number and types of housing units In the City of Diamond Bar for each of the ofternatives. Including the General Plan Alfernative, is contained In Table V.I. Under the Medium and Maximum Development alternatives, the number of residential units at buildout will Increase by four and eleven percent, respectively, In comparison to the General Plan Altemattve. Most of the Increase In the housing units under the Medium Development Alterr cfte result from an increase in the number of mutts -family units (10 percent more than the General Plan Alternative). while most of the Increase In housing units under the Maximum Development, Alternative results from an Increase In the number of single family units (17 percent more than under the General Plan Alternative). Under the No Project Aiternative, the number of residential units will remain at Its present levels, of 17,664 unite. In comparison to the General Plan Affemattve, this represents a decrease overaA of 14 percent. Rural/hilWde residential units would have the largest decrease (cut by more than haft) In comparison to the General Plan Alternative. Level of impact Compared to the Proposed General Plan., No Projea Decreased Medium and Maximum Development: Increased CITY Of DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT July 9. 1992 t r t n 16. WATER Calculation of the domestic water demand tar each of the alternatives, including the General Plan Alternative, is presented in Table V4. Development under both the Medium and Maximum Development alternatives would result in increased levels of demand for domestic water In comparison to the domestic water demand under the General Plan Alternative (a two percent Ono 13 percent increase, respectively), likewise, the NO Project Alternative would result in a decreased level of demand for domestic water, in comparison to the General Plan Alternative (a 21 percent decrease). Level of Impact Compared to the Proposed General Plan: No Project: Decreased Medium and Maximum Development., Increased Table V-9 Domestic Wolter Demand by Alternative WATER DEMAND GENERAL PLAN NO PROJECT MEDIUM DEVELOPMENT MAXIMUM DEVELOPMENT ALTERNAT1W ALTERNATIVE ALTERNAnvi ALTERNATIVE Residential demand (million gallonvow day) 1 10.6 9.1 11.0 11:9 Non-rasideMbl demand (mlillon galloraPer day) 2 2.T 0.9 2.0 2.7 Total (mlillon gallons/pw daV) 12.7 10.0 13.0 14.6 Source: Pkinnlnq Network. July, 1991 Based upon a consumption factor of 170 gallons Per person Der day. Based upon o consumption factor Of 100 gallons Per employee per day, 17. WAsrEwAmR Using the same methodology as delineated in Section lV-Q on Wastewater, the generation of wastewater for each alternative, including the General Plan Alternative, may be calculated. The volume of wastewater generated under the Medium Development Alternative is equivalent to what would be generated under the General Plan Alternative (7.0 million gallons per day), and therefore, impacts would be the some. Under the Maximum Development Alternative, more wastewater would be generated (8.2 million gallons per day, or an increase of 15 percent). Similarly, under the No Project Alternative, less wastewater would be generated (5.0 million gallons per day, or a decrease of 29 percent) Level of Impact Compared to the Proposed General Plan: No Project: Decreased Medium Development: Same Maximum Development: Increased CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT Juty 9.1992 V -T A 20. C€RCULAnON Additional traffic that would be generated under. the Medium and Maximum Development alternatives compared to the proposed project, as presented- in the Circulation Element under alternatives analysis. These tables indicate that more vehicle trips would be generated due to the higher population, more employees, and greater extent of land uses under these alternatives. Approximately 524,089 average daily trips and 7,546,439 vehicle miles would be generated under the Medium Density Alternative, while 588,185 average daily trips and 8,453.290 vehicle miles would be generated under the Maximum Development Alternative. These figures compare to an estimated 528,427 trips and 6,926,812 miles under the proposed project (General Plan Alternative) and 347,542 trips and 5,033,549 miles under existing conditions. Therefore, both the Medium and Maximum Density Alternatives represent increased circulation impacts in comparison to the General Plan Alternative, while the No Project Alternative will have correspondingly fewer impacts. Level of Impact Compared to the Proposed General Plan: No Project: Decreased Medium and Maximum Development: Increased CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT A0V 9, 1992 V-16 p m m m n^ Oao 'p P co f} m @ aa co O~ ^ y D O acq m N m ql m m m n^ Oao 'p P co f} m @ co O~ Q fN N m M m ql Vt. CUMULATIVE IMPACTS CITY OF DIAMOND BAIL FINAL ENVIRONMENTAL IMPACT REPORT JuW 9.1992 B. FARM RESOURCES AND SEISMICITY The hillside areas immediately surrounding Diamond Bar are composed of the Puente Formation and similar weak geological materials, while neighboring flatiand areas are composed of more stable fill and alluvial materials. While some of these materials may be naturally unstable or weak in terms of physical support, proper engineering can adequately protect future residents in the region from potentially harmful geological conditions. ' The entire Southern California region faces an ongoing threat from major earthquakes, most notably from the San Andreas, Newport -Inglewood, Chino, and Whittier faults. The immediate area around Diamond Bar also contains numerous faults. although many are small and considered inactive. The State Office of. Emergency Services estimates thousands of casualties and millions of dollars of damage to homes and businesses could result from a major southern California earthquake. Proper engineering of buildings and disaster preparedness, both in the home, at work, and on a community level, could adequately mitigate the potential health and safety impacts from earthquakes. However, many cities have not yet implemented a program to mitigate potential impacts to unreinforced masonry buildings, and disaster planning has not yet been embraced on a region -wide, proactive basis, although many cities and communities have begun to implement disaster preparedness programs. Since the region is not adequately prepared at this time, the cumulative impacts of regional development, relative to a major earthquake, have the potential to be significant and adverse at this time. This region also overlaps several Mineral Resource Zones which include aggregate -producing streambeds in the San Gabriel Foothills to the north. Despite these resources, the area will eventuafiy experience a lack of available construction materials, primarily aggregate, although these needs may be met by resources in other nearby zones. However, local jurisdictions have become more and more restrictive on uses that extract or process such materials, and so it becomes more likely that local needs may not be met by local resources in the future, C. DRAINAGE AND FLOOD CONTROL Most of the areas immediately adjacent to the City, except to the west, are relatively hilly and do not face significant threats from flooding, although there are localized problems with erosion and natural drainage channels. The portions of the cities of Industry and Walnut. Immediately northwest - and west of Diamond Bar, are relatively flat and are potentially threatened by flooding. However, these areas are undeveloped at present, so the threat to residents or workers is slight. Typically, flood prone areas must prove they are not threatened or have been protected from a standard project flood (100 -year intensity). To date, flooding has not been a major Issue in developing portions of the East San Gabriel Valley, and is not expected to be a major public safety threat in the future, as long as proper planning and engineering are employed to adequately protect people and facilities. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT .0* 9, 1992 VI -2 F. AIR QUALITY Southern California, including the East Son Gabriel Valley, suffers from some of the worst air pollution in the nation. The South Coast Air Quality Management District (SCAQMD) and the Southern California Association of Governments (SCAG) are working in cooperation with each other and oil local agencies to Implement the Air Quality Management Pian (AQMP). The AQMP is designed to -meet the federal requirements of the State Implementation Plan (SIP), and provides guidelines for behaviors and programs that local businesses and (eventually) residents will have to implement to improve air quality. While local cities are encouraged to prepare air quality elements, or for their -general plans to address air quality, acceptance of change is slow and the air basin is expected to remain out of compliance with State and federal air quality standards through the year 2000. Because the basin is so far out of attainment of air quality standards, any air pollutants added to the air basin are considered significant and adverse, even from those jurisdictions that comply with all the requirements of the AQMP. According to the SCAQMD, air emissions over the entire south ,coast air basin will be 8,036 tons per day by the year 2000. Of this, vehicles and land uses within Diamond Bar represent 0.6 percent of the entire air basin pollutants (49.3 tons). Diamond Bar's emissions are very similar in composition to the air basin as a whole, with carbon monoxide ,representing almost half (48%) of the total. Particulates represent over a quarter (289'x) of the total, with the remainder comprised of reactive organic gases (13%) and oxides of nitrogen (11 %). See the Air Quality Appendix for additional data on cumulative regional emissions. G. NOISE The general region experiences noise from typical urban sources such as freeways (10, 57, and 601, major roadways (Colima. Valley), railroads, etc. In addition, medium to heavy industrial uses within the City of Industry generate moderate levels of noise, however, these uses are not located adjacent to any residential areas. Development of the area will slowly increase local noise levels, particularly along major roadways. Noise impacts to sensitive receptors such as schools, day care centers, or hospitals could occur if they are located adjacent to major roadways. However, careful planning and engineering should Off ectively mitigate potential noise impacts. H. CULTURAL RESOURCES The East San Gabriel Valley is underlaln by bedrock formations that yield marine mfcrofossils. The area also supported bands of Indian tribes, and numerous artifacts of their existence have been found, especially in the local hills. The area was also used for agriculture and ranching as recently as the late 1960's. Development in vacant and/or hillside areas may yield undiscovered paleontological, archaeological, or historical resources. Such disturbance could negatively Impact such re=Lffcess H adequate care is not taken to document or recover artifacts found during grading. Props€ scientific study prior before, and/or adequate recovery during, development should effectively m'rfigate potential impacts to cultural resources. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT July V, I m VI -A L HEALTH AND EMERGENCY SERVICES The East San Gabriel Valley is presently served by dozens of medical facilities, ranging from small medical offices in business park centers to comprehensive community hospitals. A wide variety of services are available at all income levels, including indigent care from County facilities. However. there is an impending crisis of health care looming throughout the Southern California. if not the entire nation. Health care costs have risen so much faster than personal income that today health care simply not affordable to families with low to moderate incomes. As with other local services, funding (but In this case personal funding) is the major limitation. However, unlike some other services such as police or fire, most medical facilities are privately operated, and $o must be profitable to continue operating. This places constraints on the types of services offered, such as trauma or long-term care for indigent patients that cannot pay for services. The question of social equity versus economy must be addressed to solve these long-term health care issues. M. HAZARDOUS MATERIALS As the region grows, industrial uses will continue to expand in approved areas. These land uses represent a potentially significant public health threat from incidents Involving hazardous materials. Additional industrial development In the City of Industry and elsewhere increases the potential for a serious train or truck accident involving hazardous materials. Although safety procedure& are usually effective to prevent accidents, accidents eventually do occur. One incident, especially if it involves a fire, tanker truck freeway accident, or train car derailment, has the potential to affect a large number of people, depending on the type of hazardous material(s) Involved. In addition, household materials such as paint and aerosol spray cans represent another major source of hazardous wastes, which also has a significant potential for illegal dumping because there are few restrictions a$ yet an household wastes. Local and County fire departments have accepted the responsibility of handling to hazardous material incidents. Cities must therefore work with the fire departments to establish appropriate planning guidelines for the location of uses and the identification of potentially toxic or hazardous materials that could affect nearby land uses, especially residential areas. At present, an accident involving hazardous or toxic materials represents such a potentially dangerous situation that their potential environmental impacts cannot be fully mitigated, even though all communities face a similar threat by the mere presence of such uses. N. RECREATION -AND OPEN SPACE The region presently has a variety of County parks and recreation areas. as well as the Angeles National Forest within the San Gabriel Mountains to the north. The area has adequate recreational facilities at present, and many local jurisdictions are planning additional local facilities to maintain service levels to local populations. Los Angeles County still maintains its own facilities; recently incorporated cities such as Diamond Bar have the responsibility for park and open space maintenance transferred to them. The major long-term planning issue for recreational facilities is funding for acquisition. development, and maintenance. Open space areas that were `dedicated' but not accepted by the County as open space for development approval on adjacent lands are now being proposed for additional development, which could significantly reduce the open space resources in this portion of the County. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT July 9.1992 VI_A S. ENERGY At present, there are adequate supplies of energy, primarily fossil fuels (oil and natural gas) to produce electricity and vehicle fuels, to serve the growing population of the region. However, the country is still heavily dependent on foreign oil supplies, and periodically experiences rapid changes in fuel prices from international events, such as the recent gulf war. Uncertainties over long-term energy availability and pricing will continue until there is a national comprehensive energy policy that provides reliable domestic energy supplies. Since long-term environmental impacts of regional growth on energy actually depend on external factors, there is at least a potential for adverse impacts without truly reliable energy sources. T. CIRCULATION Regional'traffic Is responsible for generating the majority of air pollutants within the south coast air basin. In an attempt to reduce both vehicular trips and trip length, the South Coast Air Quality Management District (SCAQMD) first focused implementation of the Air Quality Management Plan (AQMP) on the imbalance of Jobs to housing in various sub -regions. More recently, the SCAQMD has begun to focus AQMP implementation on the new regional Congestion Management Plan (CMP), which outlines physical changes to freeways, such as High Occupancy Vehicle (HOV) (lanes or ramp metering) as well as to arterial streets, such as signal synchronization or restrictions on truck traffic during peak hours, to relieve congestion. Within the, East San Gabriel Valley, HOV lanes are being explored on the 57, 60, and 101210 freeways to reduce commuting traffic during peak hours, as well as improving the 57/60 interchange to eliminate having to exit the west -bound 60 Freeway to go to the northbound 57 Freeway. In addition, the AQMP emphasizes Traffic Demand Management, which outlines incentives or prograrns local employers can offer to reduce home -to -work commuting (such as 4 -day work weeks) and to increase vehicle ridership- (such as building park and ride facilities or offering carpool incentives). In addition, various alternative and/or public transit options are being considered both locally and on a regional basis. At present, regional planning agencies are investigating various light and commuter rail proposals to reduce single driver commuting into the Los Angeles basin from outlying areas that offer more affordable housing, such as the high desert. Within the East San Gabriel Valley, commuter rail lines are being explored along the 60 and 101210 freeway corridors to connect San Bernardino and Los Angeles. Discussions are underway to utilize former train stations in Pomona and.possibly Montclair to serve local riders. Light rail options are also being explored in the east valley, such as along the 57 Freeway corridor, between Orange and Los Angeles counties. Locally, the City of Diamond Bar is exploring the possibility of utilizing the Southern Pacific and Santa Fe railroad lines adjacent to the City (at the west end of Sunset Crossing and Lycoming(Lemon) for connections to the 10/210 commuter rail corridor previously discussed. Although there are a whole host of programs, improvements, and options being considered at present, plans are not yet detailed enough to reduce regional traffic below significant levels. Therefore, the cumulative impacts of traffic from regional growth should be considered significantly adverse until firm mitigation plans are established. CITY OF DIAMOND] BAR FINAL ENVIRONMENTAL IMPACT REPORT .July 9,199 VI -8 VII. GROWTH -INDUCING IMPACTS CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT J* 9, 1992 VIII. SIGNIFICANT UNAVOIDABLE ENVIRONMENTAL EFFECTS CITY Of DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT JWV 9,1992 IX. SHORT-TERM USE VERSUS LONG-TERM PRODUCTIVITY CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT JUv 9. 1992 C. FOSSIL FUELS The potential for long-term shortages of fossil fuels such as petroleum products, natural gas, and coal is a well-documented local, State, and national issue. As supplies of these resources are consumed, the amount available to future generations is reduced, directly affecting the energy. related options available to future generations. As with aggregate resources, use of fossil fuels is based on short-term economic considerations; other sources of energy are relatively more expensive and thus encourage the use of non-renewable fuels. Within the City, increased use Of fossil fuels will result from temporary construction activities, including use of construction vehicles, and local congestion due to construction activity within public roadways (from increases in traffic congestion). In addition, development within the City will also entail Increases in trip distance$, resulting in increased consumption of fossil fuels. Development of added residential and commercial areas will also permanently increase consumption of fossil fuels for heating and electricity. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT July 4.1992 DC -2 X. SIGNIFICANT IRREVERSIBLE ENVIRONMENTAL CHANGES CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT JUN 9. 1992 A ,ADDITIONAL MATERIALS CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT -hAv 9 1 ow Diamond Bar Country Estates Jan Davenport (714) 861-4114 Diamond Bar Improvement Association Diane Forbing (714) 861-1147 Diamond Born Management Associaiian Dick Smiley (714) 595-4808 DKS Associates Cathy Higley (714} 543-9601 Larry Wymer Endo Engbeerfng Greg Endo (714) 768-4333 Insurance Service Organizahon Customer Service (213) 725-1777 Kohn. Regan & Mouchty, Inc. Alan Kotin (213) 820-0900 David Selinger Los -Angeles Clly Cultural Heritage Commission Nancy Hernandez (213) 485.6793 Los Angeles County Fire Department Chief David Horn (818) 913.0017 Barbara Herrera (213) 267.2404 Michael Wilkinson (714) 599-4615 John Gee (213) 267-2404 Michael Freeman Flood Control (PW) George Amimoto (818) 458-3104 Sam Ito (818) 458-3917 Michael Anderson (818) 458-4308 Daniel Koss (818) 458-4314 Mike Nagao (818) 458-4337 Stan Dixon (818) 458-4920 Mike Sollmon (818) 458-7928 Geology (Pw) James Shuttleworth (818) 458-4923. Historical Landmarks Khanh Nguyen (213) 974-1431 Watter Popoff Hydrology (PW) Chander Gatg (818) 458.6124 Sam Shahin (818) 458-6144 CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT J* 9. 1992 X3-2 San Bernardino County, Chino Hills District Office John Kelso -Shelton (714) 780-6222 Southern California Edison -Company Jett Burt (714) 592-3709 Mike Orduno (714) 939-4738 Ben Gongora (818) 309.2709 Southern California Gas Company Kevin Shore (714) 394-3845 Joe Berta Southern Cela Gott Association Newel Pinch (818) 980.3630 Three Valteya Municipal Wafer DW6& Richard W. Hansen (714) 621-5568 U.S. Federal Emergency Management Agency (800) 333-1363 University of California at Los Angeles (UCLA) Archeological information Center Brian Glenn, PhD (213) 825-1980 Shelly Gomes Paleontology Bruce Runnegar, PhD (213) 206-1738 Unocal Production Jim Grimes (213) 946-6202 Property Development Dennis Chapman (714) 579-3155 Urban Decision teems Evan Cole (213) 820-8931 WCkxd Vaitiey li09d School DisMct Clayton Chapuf (714) 595-1261 Mark Hansberger Hank Carter Wah-AA Valley Wader District Brian Lewis (714) 595-7554 Dennis Hernandez CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT July 9. 1971 XI -4 Chino, City of, 'Park Master Plan Update." Parks and Recreation Department, 1984, Diamond Bar, City of.- 'City f: 'City Hall Reporter,' Volume I, Issues 1 and 2, 1990. 'Community Economic Profile for the City of Diamond Bar.' Diamond Bar Chamber of Commerce, 1990. EDAW, Inc., 'Final Environmental Impact Report for the Chino Hills General Plan Amendment and Specific Plan,' County of San Bernardino, March 1982. Federal Home Loan Bank of San Francisco. 'Housing Vacancy Survey," October 1988. Flood Data Systems, Inc. (FDS). Los Angeles County Maps #135 and #136, 1980. GEOTECHNICAL (PRELIMINARY) STUDIES FOR TENTATIVE TRACTS (M: TT 33894 by S.E. Medail & Associates Inc, dated February 13, 1978. TT 31152 and TT 31153 by Medoff at al dated December 26, 1979. TT 31977 by Schaefer Dixon Associates dated May 11, 1989, Parcel Map 2134 by Leighton and Associates dated June 24. 1981. TT 27531 by Hood and Schmidt, Inc. dated May 27, 1965. TT 34423 by Leighton and Associates dated October 25, 1982. TT 30755 by Robert Stone and Associates dated February 3, 1970. TT 30091 by Leighton and Associates dated February 27, 1981. TT 42570 and TT 42571 by Medall at al, dated August 9, 1985. Jameson, E.W., Jr. and Hans J. Peelers, 'California Mammals,' University of California Press, Berkeley, 1988. Los Angeles County, Department of the County Engineer-Facilities(LADCE), 'Geologic -Seismic Study for the General Plan, Diamond Bar,' Engineering Geology -Environmental Development Division, September 12. 1980. Los Angeles County, Department of the Forester and Fire Warden (LACDFFW): 'Drought Tolerant Landscaping,' 1979. 'Dak Trees: Care and Maintenance," 1988. 'Vegetation Management In the Wildland-Urban Interface of Los Angeles County,' 1989a. 'Tire Eucalyptus Longhorn Beetle: Prevent the Spread of This Pest,' 1969b. 'Fire Hazard vs. Erosion Control,' 1989c. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT J* 9.1992 )Q-6 Parsons Brinckerhotf Quade and Douglas, Inc. (PBQ&D), 'Soquel Canyon/Tonner Canyon Feasibility Study - Technical Memorandum No. 1," Novemner 1990. Phillips Ranch, 'Specific Area Plan and Environmental Impact Statement for a Portion of the Phillips Rancty December 6, 1975. Planning and Design Solutions (P&DS), "The Members Club at Firestone." Project 88-118 (Tonner Canyon Golf Courses), Screencheck EIR - SCH #88110206, Southern California Golf Association. September 1989. Planning Network, 'Dratf EIR for the Inland Empire Commerce Center,` City of Fontana. 1990, Pomona Unified School District (PUSD), "Developer Fee Report,' August 1990, Proctor, R.J. "Geologic and Engineering Features in Southern California," Association of Engineering Geologists. 1966. Puente Basin Watermoster, "Fourth Annual Report - Fiscal Year 1989-90.' September 30, 1990. Reed, R.D. and J.S. Hollister, 'Generalized Tectonic Map of Southern Callfornia," American Society of Petroleum Geologists, 1966. Robert Bein. William Frost & Associates (RSWFA), 'Draft Environmental Impact Report for Tentative Tract 43,571 (Zone Change 85-010),11 July 1987. Robbins, Chandler, Bertel Brunn, et al. 'A Guide to Field Identification of Birds in North America,` Golden Press, New York, 1986. South Coast Air Qualify Management District (SCAQMD): 'AIr Quality Data Sheets,' 1983-1989. "Summary of Air Quality in California's South Coast Air Basin," 1985 and 1986 update. 'Air Quality Handbook for Preparing Environmental Impact Reports.' April 1987. 'Environirnentat Impact Assessment," March 1988. 'Rules and Regulations,' May 1989. Southern California Associatlon of Governments (SLAG): 'Draft Baseline Projection: Background Information for the Development of the SCAG-87 Growth Forecast Policy,' August 1986a. 'Drcft Baseline Projection: Subregional Breakdown,' December 1986b. 'Draft City Projections: Baseline, with Adjustments to Reflect City Comments,' February 1987. 'Regional Housing Needs Assessment (RHNA),' June 1988a. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT .k* 9. 1972 1� Walnut Valley Unified Schoot District (WVUSD), 'A Plan for the Levying of Developer Fees in the Walnut Valley Unified School District,' May, 1989. Walnut Valley Water District (VIIVWD) 'Master Water Plan - Engineering Report." 1981. 'Five Year Water System Plan," 1990. Westways, 'History of the Diamond Bar," September 1962. Wilbur Smith Associates (WSA), "Toll Tratfic Analysis and Preliminary Financial Feasibility - Tonner Canyon and Soquei Canyon Tollways Study - Technical Memorandum (Draft),' November 1990, Yorba Linda, City of, "Recreation Element of the General Plan," Volumes 1 & 2, May 1982. CITY OF DIAMOND BAR FINAL ENVIRONMENTAL IMPACT REPORT Jh* 9, t 99'2 X1-10 TECHNICAL APPENDICES IMPLEMENTATION/ MITIGATIONMONITORING PROGRAM July 25, 1995 ZMPLEMENTATION/NIITIGATION MONITORING ►M 11' 1.1 �.y i ► Adoption of a General Plan is not an end, but a milepost in an ongoing community planning process. The purpose of this section is to identify implementation actions, as well as to assign responsibilities to ensure General Plan implementation. B. GENERAL PLAN IlV MMENTATION AND INTERPRETATION 1. ZONING Following adoption of the Diamond Bar General Plan, the City's zoning map will be revised as necessary to be consistent with the General Pian Land Use map. Zoning ordinance provisions will also be revised in order to maintain consistency with the updated General Plan. 2. SUBDIVISION REGUI..ATIONs In addition to a comprehensive revision of zoning ordinance provisions, a comprehensive review and revision of City subdivision regulations will be undertaken to maintain consistency with the updated General Plan. 3. ANNUM. GENERAL PIAN REVIEW California Government Code Section 65400(b) requires the planning agency of each city and county in the State to provide an "annual report to the legislative body on the status of the (general) plan and progress in its implementation." Such a report will be prepared and delivered annually to the Diamond Bar City Council. In addition, AB 3180 (Ch. 1232, Stats. 1988), which amended the California Environmental Quality Act, requires every city and county to develop a monitoring or reporting plan in order to mitigate or avoid significant environmental effects. Because the strategies of the Diamond Bar General Plan were used as environmental mitigation measures in the Plan's EIR, the annual report prepared for the City Council regarding implementation of the General Plan will also be used to satisfy AB 3180 requirements. 4. DEvELOrmENT REvIEw State law requires that zoning and subdivision actions undertaken by cities and counties be consistent with the local general plan. 1b assist city staff and decisionmakers, as well as potential applicants and the public in understanding the General Plan criteria by which individual projects will be reviewed in the City of Diamond Bar, a Development Review Checklist will be formulated. Diamond Bar General Plan Implementation and Mitigation Monitoring Program May 5, 1995 - Revised July 25, 1995 MMP -1 Land Use and Minor Amendments Land Use and Minor Amendments will be considered by the PIanning Commission on an ongoing basis. Lancs Use and Minor Amendments are revisions to the land use designations of the General Plan, as well as text changes that do not create the need for extension of new urban services to an area. Technical Amendments Amendments of this nature are essentially changes to the data base and statistics used in preparation of the plan, changes to correct textual errors, and changes within the text to clarify the meaning of policies and actions as adopted. These will be processed on an ongoing basis. 7. INTERPRETATION OF TAE GENERAL PLAN a. Map Boundaries and Symbols In any case where uncertainty exists regarding the location of boundaries of any land use category, proposed public facility symbol, circulation alignment or other symbol or line found on the official maps, the following procedures will be used to resolve such uncertainty: • Boundaries shown as approximately following lot lines, shall be construed to be following such lot lines. • Where a land use category applied to a parcel is not mapped to include an adjacent street or alley, the category shall be considered to extend. to the centerline of the right-of-way. • Boundaries shown as following or approximately following the limits of any municipal corporation shall be construed as following such limits. • Boundaries shown as following or approximately following section lines, half - section lines, or quarter -section lines shall be construed as following such lines. • Boundaries shown as following or approximately following tate centerlines of streams, creeks, rivers, or other continuously flowing water courses shall be construed as following the channel centerline of such water courses taken at mean low water, and, in the event of a natural change in the location of such streams, rivers, or other water courses, the zone boundary shall be construed as moving with the channel centerline. Boundaries shown as separated from, and parallel or approximately parallel to, any of the features listed above shall be construed to be parallel to such*features and at such distances therefrom as are shown on the map. Symbols may be used that indicate appropriate locations for proposed public facilities which are not property specific. They indicate only the general area within which specific facility should be established. Diamond Bar General Plan Implementation and Mitigation Monitoring Program May 5, 1995 - Revised July 25, 1995--MMP-3 1. If a later activity would have effects that were not examined in the program EIR, a new Initial Study would need to be prepared, leading to either an EIR or a Negative Declaration. 2. If the agency finds that, pursuant to Section 15162, no new effects could occur or no new mitigation measures would be required, the agency can approve the activity as being within the scope of the project covered by the program EIR, and no new environmental documentation would be required. 3. An agency shall incorporate feasible mitigation measures and alternatives developed in the program EIR into subsequent actions in the program. -4. Where the subsequent activities involve site specific operation, the agency should use a written checklist or similar device to document the evaluation of the site and the activity to determine whether the environmental effects of the operation were covered in the program EIR." In addition, time and changed circumstances might change conditions, so that additional environmental review is required. CEQA also encourages the "tiering" of EIRs, which is defined in Section 15385 as follows: "Tiering" refers to the coverage of general matters in broader EIRs (such as on general plans or policy statements), with subsequent narrower EMS or, ultimately, site-specific EIRs incorporating by reference the general discussions and concentrating solely on the issues specific to the EIR subsequently prepared. Tiering is appropriate when the sequence of EIRs is from a general plan, policy, or program EIR to a program, plan, or policy EIR or lesser scope or to a site specific EIR. Therefore, a site-specific EIR need not examine environmental effects of a proposal if those effects have already been adequately addressed in the program EIR. 2. MITIGATION MONrroRING In compliance with Public Resource Code Section 21081.6 (enacted by the passage of AB 3180), public agencies approving projects which may cause significant environmental impacts must monitor the measures outlined in the EIR to mitigate the impacts of the project. For this General Plan (the "proposed project"), the goals, objectives, policies, and specific actions, are the proposed mitigation measures of the updated General Plan. The following Mitigation Monitoring Program is designed to monitor these goals, objectives, and strategies, and was approved by the City Council along with the General Pian, FOR, and Addendum. Diamond Bar General Plan Implementation and Mitigation Monitoring Program May 5, 1995 - Revised July 25, 1995 MMP -5 traterry -talus ReSPole Titmgg- - .Funding. d. Designate existing, planned townhome condominium, apartment, mobilehome, and other multiple family residential properties as Medium Density Residential (RM) on the Lend Use map. Maintain a maximum density of 12.0 dwelling units per gross acre (12 du/ac) within these areas. e. Designate existing and planned townhome,condominium, apartment, and ocher multiple family residential properties as Medium High Density Residential (RAM on the Land Use Map. Maintain a maximum density of '16.0 dwelling units per gross acre (16 du/ac) within these areas f. Designaieexisting and proposed high density condominium and apartment developments and other high density properties as high Density Residential (RIS on the land Use Map. Maintain a maximum density of 20.0 du/ac within these areas. g. Develop a slope density ordinance which shall be applied to all4and use designations in the City. Such slope density ordinance shall reduce the number of dwelling units otherwise designated for the property as a function of average slope of the land in question in excess of 25 percent. Average slope is defined as follows: I = Contour interval in feet Slope -- 0.002296L L = Summation of length - A of all contours in feet A = Area in acres of parcel being considered 1.1.2 Ensure that the land use classification system provides adequate separation and buffering of less active residential uses from more intense land uses, major streets, and highways. DIAMOND BAR GENERAL. PLAN IhWLEMENTATLON AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - RSvism JULY 25, 1995 MMP -I-2 irltfegYRsput!s►41eIm t6:, :.- Funding enc 1.1.5 The Public Facilities (PF) designation is New Program . City Council, upon Ongoing General fund; designed to identify existing or potential Planning development (future) sites for necessary public facilities Commission review fees or infrastructure improvements. The recommendation primary purpose of land designated as Public Facilities, is to provide areas for the conduct of public and institutional activities, including but not necessarily limited to, local, State, and federal agencies, special districts, and both public and private utilities. These uses maintain development standards which do not exceed that of the most restrictive adjacent designation. 1.1.6 Areas designated as Open Space (OS) New Program City Council, upon Ongoing General fund; provide recreational opportunities, Planning development preservation of scenic and environmental Commission review fees values, protection of resources (water recommendation reclamation and conservation), protection of public safety and preservationof animal life. This designationalso includes lands which may have been restricted"to open space by map restriction, deed/designatioa, condition, covenant and/or restriction or by an Open Space Easement pursuant to California Government Code (CGC) Section 51070 et sequential and Section 64499 et sequential. This designation carries with it a maximum development potential of one single family unit per parcel, unless construction was previously restricted or prohibited on such properties by the County of Los Angeles. 1.1.7 Provide Park (PIQ designations for New Program City Council, upon Ongoing General fund; existing and future public parks. Designate Planning development the Diamond Bar Country Club as Golf Commission review fees Course (GC). Designate major private recommendation recreational facilities (e.g. Little League ball fields, YMCA, as Private Recreation (PR). DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - REvzsED ]uLY 25, 1995 MMP -l-4 tegy ;status Respausthlr T--9Funding Agency Objective 1.2 Preserve and maintain the quality of existing residential neighborhoods while offering a variety of housing opportunities, including mixed land uses. 1.2.1 Maintain a system of identifiable, Existing City Council, Ongoing General fund; complementary neighborhoods, providing Program upon Planning development neighborhood identity signage, where Commission review fees appropriate, and ensuring that such recommendation; signage is well maintained over time. Planning Department 1.2.2 Maintain the integrity of residential Existing City Council, Ongoing General fund; neighborhoods by discouraging through Program upon Planning development traffic and preventing the creation of new Commission' review fees major roadway connections through recommendation; existing residential neighborhoods. Planning Department 1.2.3 Maintain residential areas which protect Existing Planning Ongoing General fund; natural resources, hillsides, and scenic Program Department; development auras. development review fees review bodies a. Development in hillside areas should be designed to be compatible with surrounding natural areas, compatible to the extent practical with surrounding development, aesthetically pleasing, and provide views from the development, but not at the expense of views of the development. b. Earthwork in hillside areas should utilize contour or landform grading. c. Minimize grading to retain natural vegetation and topography. 1.2.4 Maintain residential areas which provide Existing Planning Ongoing General fund; for ownership of single family housing Program Department; development and inquire that new development be development review fees compatible with the prevailing character review bodies of the surrounding neighborhood. 1.2.5 Enact Development Code Provisions for the development of second units an a single single family parcel. Ensure that the single family character and integrity of the neighborhood si 1.2.5 Enact Development Code Provisions for Existing Planning Ongoing General fund; the development of second units on a Program Department; development single family parcel. Ensure that the development review fees single family character and integrity of review bodies the neighborhood be protected and that road, water, and sewer systems are capable of supporting such development. D1AmoNj) BAR, GENF AL PLAN IMPi.EMEPtTAT1oN AND MJTTGATION MONITORING PROGRAM MAYS, 1995 - R mED Jtrt.Y 25, 1995 MMP -1-6 S1raEegy......: ........ .. talus .:_..:. 1 P011mlilQ:........:.:_ ttung ]Euriding 1.5.5 Obtain Open Space land through feasible New Program Community Ongoing Development acquisition and management techniques Development review fees such as: Director; development a. Acquisition of land for parks and review bodies natural area conservation through a process of entitlement review and, density transfer among land uses of like designation and entitlements review. b. Investigation of a bond issue for purchase of open space areas not already protected by open space restrictions. c. Establishment of lighting and landscape districts for open space improvements and maintenance. d. Through the entitlement process where the landowner/developerwould agree to sell at less than market value or dedicate property in exchange for developmentrights. 1.5.6 To preserve significant environmental Existing City Council Ongoing General fund; resources within proposed developments, Program Development allow clustering or transferring of all or review fees; part of the development potential of the dedication entire site to a portion of the site, thus preservingthe resourcesas open space, and mandatingthe dedication of those resources to the City or a conservancy. Objective 1.6 Consistent with the Vision Statement, provide, flexibility in the planning of new development as a means of encouraging superior land use by means such as open space and public amenities. DIAMOND BAR GENERAL PLAN IMPLEMENTA'T'ION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - REVERED JULY 25, 1995 MMP -I-12 Strategy Status Respans ble 'Iim'�g Elrnding 1.6.2 Requirethat Planned Developmentprojects New Program Community Ongoing Development provide a greater level of community Development review fees amenities and cohesiveness, achieve Director; superior land use, and create a more development desirable living environmentthan could be review bodies achieved through conventional subdivision design and requirements. 1.6.3 Designated the following larger properties New Program Community As appropriate Development as future Specific Plan (SP) areas. This Development review fees designation is an overlay to the base land Director use category providing for mixed use projects in the future subjectto approvalof a Specific Plan consistentwith Government Code Section 65450. The issues to be addressed and the type and maximum intensity of development within the future Specific Plan area is defined below. a. Specific Plan Area 1 SP -1 incorporates the Sphere of Influence area. This 36M acre multiple ownership area contains unique biological and open space resources. The formulation of a future Specific Plan should incorporate provisions to protect existing resources while minimizing future adverse impacts to both the human and natural environmentof the City, as well as the region (see Strategy 1. 1.4 of the Circulation Element). Facilities appropriatefor this site should be, designed based upon a vision for the future, and not merely extend the patterns of the past. Such facilities may include a high school and other educational institutions, reservoir for practical and aesthetic purposes, commercial developments which are not typical of ' those found in the area, and a variety of residential, churches, institutional, and _ other uses which are complementary to the overall objective of having a master planned area. Development within the Tres Ilermanos area should be designed so as to be a part of the Diamond Bar community, as well as compatiblewith the adjacentlands. DIAMOND BAR GIaNERAL PLAN IMPLmENTATIONAND MITIGATION MONITORING PROGRAM MAY 5, 1995 - REvtsED IDLY 25, 1995 MMP -I-14 Strategy $tatt}s ResponsrblG Ti�rng „:iding ... GOAL 2 "Consistent with the Vision Statement, manage land use with respect to the location, density and intensity, and quality of development. Maintain consistency with the capabilities of the City and special districts to provide essential services which achieve sustainable use of environmental and manmade resources." Objective 2.1 Promote land use patterns and intensities which are consistent with the Resource Management Element and Circulation Element. 2.1.1 Ensure that planning programs and New Program City Council; Ongoing General fund individual dovelopmentprojects within and City Manager; through affecting the City recognize, and are Community adoptionof sensitive to, eironmental resource Development the pian limitations. Director a. Prior to approving new development or the intensification of existing development within the City of Diamond Bar, ensure that the environmental consequences of the proposed action have been recognized and property adressed. b. When reviewing plans and development projects referred to the City by adjacent jurisdictions, insist that there be a recognition and appropriate mitigation of the environmental consequences of the proposed action. 2.1.2 Ensure that new development utilizes Existing Community Ongoing Development feasible contemporary technologies to Program Development review fees reduce energy and water consumption, Director; generation of solid and hazardous wastes, development and air and water pollutant emissions. review bodies 2.1.3 Ensure that time -specific issues are Existing All affected Ongoing General fund; evaluated as part of the review of new Program departments development developmentand intensification of existing review fees development. For example, when deemed appropriate by the City, require prior to approval that biological assessments be prepared through the seasonal cycle of plants and mitigation of wildlife for a period of not less than one year. 2.2 Maintain an organized pattern of land use which minimizes conflicts between adjacent land uses. 2.2.1 Require that new developments be, Existing Community Ongoing Development cwmpatiblewith surroundingland uses. Program Development review fees Director; development review bodies 2.2.2 Prohibit the development of adjacent land Existing Community Ongoing Development uses with significantly different intensities, Program Development review fees or that have operating characteriatieswhich Director; could create nuisances along a common development boundary, unless an effectivebuffer can be review bodies created. DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - REVISED duLX 25, 1995 MMP -1-16 3.1.3 Pursue the establishment and expansion of New Program Parks and Determine General fund; landscape maintenance districts as a means Recreation need and assessment of ensuring the ongoing maintenance of Director; Parks feasibility district funds medians and community entry statements, Commission within 6 as well as maintenance of landscaping of months of hillsides along major roadways. General Plan adoption; establish needed funding within 1 year thereafter 3.1.4 consider a program to place public art at New Program Parks and Determine General fund; prominent locations throughout the City of Recreation need and development Diamond Bar. Director; Parks feasibility review fees Commission within 6 months of General Pian adoption; establish program, if needed and feasible, within 6 months thereafter 3.1.5 Encourage the provision and maintenance I New Program Parks and Determine General fund; of neighborhoodidentification signage. Recreation need and development Director; Parks feasibility review fees Commission within 6 assessment months of district funds General Plan adoption; establish program, if ncededand feasible, within 6 months thereafter Objective 3.2 Ensure that new development, and intensification of existing development, yields a pleasant living, working, or shopping environment, and attracts interest of residents, workers, shoppers, and visitors as the result of consistent exemplary design. 3.2.1 Within the urban residential portions of the New Program City Council, upon Ongoing Development City, require the incorporation of open Planning review fees spaceand recreational areas into the design Commission of new projects. Within topographically recommendation rugged and rural areas, emphasize the preservation of natural landforms and vegetation. 3.2.2 Require in the Development Code that New Program City Council, upon Prepare General fund; setbacks from streets and adjacent Planning Development development properties relate to the scale of the Commission Code review fees structure as well as the size of the street recommendation provisionsfor right-of-way. Require that building hearingwithin setbacks along roadways be varied so as to 6 months of avoid a monotonous street scene. General Plan adoption DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - REvisED JULY 25, 1995 MMP -1- 18 3.2.7 Ensure that commercial developments are Existing Community Ongoing Development designed with a precise concept for Program Development review fees adequate signage, including provisions for Director; sign placementand number, as well as sign development scale in relationship to the building, review bodies landscaping, and readability as an integral part of the signage concept. Ensure that signs are integrated into the overall site and architectural design theme of commercial developments. 3.2.8 In conjunction with area utility companies, New Program City Engineer Establish General fund; pursue a program of undergrounding program development overhead utility lines. within 1 year review fees of General Plan adoption 3.2.9 Include within the Development Code New Program City Council, upon Complete General fund; requirements for the size and quantity of Planning Development development trees to be planted within new development Commission Code review fees and intcnsificationof existing development. recommendation provisions within 6 months of General Plan adoption 3.2.10 New development shall comply with the Existing Community Ongoing Development City's hillside ManagementOrdinance. Program Development review fees Director; development review bodies 3.2. 11 In Rural Residential (RR) minimize right- New Program City Council, upon Complete General Fund; of -way width to the extent feasible. Planninc standards development Commission within 6 review fees recommendation months of General Plan adoption Objective 3.3 Protect the visual quality and characterof remaining natural areas, and ensure that hillside developntentdoes not create unsafe conditions. 3.3.1 Balance the retention of the natural Existing City Council, upon Prepare General fund; environment with its conversion to urban Program Planning standards for development - forms. Commission inclusion in review fees recommendation; the Community Development Code within 6 months of General Plan adoption 3.3.2 Promote incorporation of hillside features Existing Community Ongoing Development into project designs. Program Development review fees Director; development review bodies 3.3.3 As part of the Development Code, Existing City Council, upon Complete General fund; maintain hillside development regulations Program Planning standards development that are sensitive to natural contours and Commission within 6 review fees land forms. recommendation months of General Plan adoption DIAMOND BAIL GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5 , 1995 - REvisED JULY 25, 1995 MMR -1-20 4.1.6 Relate major regional impacts to planning Existing City Council; Ongoing General fund; action which might be required to safeuard Program City Manager; development the best interests and Quality of Life of the Community review fees City of Diamond Bar. Development Director 4.2 Maintain City boundaries which are reasonable in terms of existing service capabilities, social and economic interdependencies,citizen desires, and City revenues and expenditures. 4.2.1 Seek annexation of those areas which have Existing City Council, upon li Ongoing General fund; primary access through Diamond Bar and ' Program Planning development whose residents and businesses are most Commission review fees logically served by the City. recommendation 4.2.2 Consider annexation of additional areas Existing City Council, upon Ongoing General fund; west of the City boundaries including Program Planning development expansion of the adopted Sphere of Commission review fees Influence, where the following findings can recommendation be made: a. Compatibility exists with the goals and desires of the people and the City of Diamond Bar; b. The proposed annexation is consistent with goals and objectives of the General Plan; c. Significantbenefits will bederivedby the City and affected property owners/residents upon annexation; d. There exists a significant social and economic interdependence and interaction between the City of Diamond Bar and the area proposed for annexation. DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995- REvislin JULY 25, I995 MMP -I-22 DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 MMP -11-2 mg 1.1.6 Provide timely review of development New Program Community Ongoing Development requests, with fees sufficient only to Development review fees cover the actual costs (direct and Director; overhead) incurred by the City. In development review order to do so, considerchanges in case bodies processing such as: • Computerize case records to allow for automated case tracking. • Schedulecescproccssingtimetables to provide reasonableexpeetations in processing applications based upon available resources. • Maintain review of EIR's to the minimum period required by law. 1.1.7 Encourage use of innovative site Existing Building Official; Ongoing Development development and construction materials Program Community review fees and techniques consistent with City Development ordinances and the UBC to reduce the Director; cost of site preparation and/or development review construction and to provide a mix of bodies dwelling unit types. 1.1.8 Comply with California Government Existing Development review Ongoing Development Code Section 65915 by providing a Program bodies review fees minimum 25 percent density bonus, or equivalent financial incentive, to residential developers who agree to make a minimum of 20 percent of the Units within the project affordable to householdswith an income of 80 percent of the County median income, or make 10 percent of the units within the project affordableto householdswith an income of 50 percent of the County median income, or make 50 percent of the units available exclusivelyto senior citizens. 1.1.9 Investigawthe feasibility of establishing New Program Community Determine Development a requirement that ten percent (10%) of Development feasibility review fees; in all new housingwithin proposedhousing Director; within 1 year lieu housing developmentsbe affordableto very low, developmentreview of General fund low, or moderate income householdsor bodies Plan adoption; pay an "in lieu" fee to be used by the if determined City for the provision of housing to be feasible, affordableto very low, low, or moderate establish income households. If determined to be requirements feasible, implement the program. and fund within 90 days DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 MMP -11-2 Strategy Status I2esltanbibleAgeag ixrttng. P C. Based on the provisions of Existing Community Ongoing Development GovernmentCodoSection 65863.7, Program Development review fees consider requiring the submission Director; of a report detailing the impacts of developmentreview any proposed mobilehome. park bodies conversion to a nonresidential use concurrent with the filing of any discretionary permit on such Property. d. Annually assess all affordable or New Program Community Ongoing General fund assisted housing units that are Development Director considered "at risk" as delineated in the "Inventory of Federally Subsidized Low-Income Rental Units at Risk of Conversion (1989)" or other appropriate federal or State documents. e. Investigate the feasibility of New Program Community Complete General fund; programs to ensure that "for sale" Development Director investigation in lieu fees housing which is subsidized so as within I year to be affordable to very low, low, of General and moderate income households Plan adoption; remain affordable to those income implement groups after sale to the first buyer. findings within I year thereafter Objective 2.2 Prevent housing discrimination in Diamond Bar. 2.2.1 Continue to distribute information Existing City Manager's office Ongoing General fund regarding the activities of the City to Program assist in the resolution of housing discrimination cases through placement of fair housing brochures at public places throughout the City and provide referrals to the Long Beach Fair Housing Council. 2.2.2 Continueto contractwith and participate Existing Affected departments Ongoing General fund in the activities of the Long Beach Program Council as they affect the City of Diamond Bar. Objective 2.3 Cooperate with regional agencies toprovide housingfor the elderly, handicapped, homeless, and other special needs groups. 2.3.1 Promote housing accessibility for Existing Community Ongoing Development elderly, handicapped, and disabled Program Development review fees; in persons. Director; lieu housing developmentreview funds bodies 2.3.2 Specifically encourage development of Existing Community Ongoing Development assisted rental housing for the elderly, Program Development review fees; in handicapped, and disabled. Specifically Director; lieu housing encourage development of such housing developmentreview funds through the use of density bonuses, tax- bodies exempt bonds, and land write-downs, combined with federal and State housing subsidies. DIAMOND BAR GENERAL PLAN WPLEMENTATIONAND MITIGATION MONITORING PROGRAM M" 5, 1995 MMP -1[1-4 Strgtegy Status Respon ibleAgeaCy 'Irmin :Etralilm -- 3.1.3 Enact Development Code provisions the New Program Community Prepare Development developmentof second units on a single Development requirements review fees family parcel. Ensure the single family Director; City within six character of the neighborhood is Council months of protected, and that road, water, and General Pian sewer systems are capable of supporting adoption such development. 3. i.4 Determine the feasibility of establishing New Program Community Determine General fund; a Craftsman and Tool Lending Program, DevelopmentDirector feasibility development utilizing State funding if necessary. within I year review fees of General Plan adoption Objective 3.2 Eliminate substandard housing by establishing a program to investigate and encourage the rehabilitation of substandard housing units within Diamond Bar. Achieve the rehabilitation of 5 very low, 5 low, and 15 moderate income housing units through the County's rehabilitation program. 3.2.1 Investigate the availability of funds, New Program Community Determine General fund; including City "in lieu" funds, for Development Director feasibility development establishing a housing rehabilitation within three review fees program. Offer priority for months of rehabilitation assistance to disabled General Plan homeowners for unit modifications to adoption; improve accessibility. establish fund within three months thereafter 3.2.2 Establish a program of public New Program City Manager's office Establish General fund; information and technical assistance to program development encourage the continued maintenanceof within one review fees currently sound housing as yearof neighborhoods age within the City of General Plan Diamond Bar. adoption 3.2.3 Utilize available housing New Program Community Initiate General fund; rehabilitation/conservation funds to Development Director requests for development establish a fund to assist low and funds within 1 review fees; in moderate households with painting, year of lieu housing minor repairs, and general maintenance. General Plan fund adoption 3.2.4 Work with the State Franchise Tax New Program City Manager's office Initiate effort General fund; Board in order to enforce the provisions within i year development of California Revenue and Taxation of General review fees; in Code Sections 11299 and 24436.5 which Plan adoption lieu housing prohibit owners of substandard housing fund from claiming depreciation, amortization, mortgage interest, and property tax deductions on State income tax. DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 MMP -11-6 Strategl ;- ltaEus:..':..::Resble_ASeIIey,:°g.; :=. >;ilivading:. 1.2.2 In conjunction with local New Program Parks and Recreation Initiate General fund; schools, environmental groups Director; Parks program park and volunteers, the City may Commission within 1 year improvement participate in environmental of General funds cducationprograms. Plan adoption Minimize or eliminate impacts on sensitive areas; Proteetthe visual seclusion of forage areas; ProvidewildHo movement linkagesto water, food and nesting; Provide vegetation that can be used by wildlife for cover along roadsides; Avoid 'intrusion of night lighting into identified areas; Allow wildlife and migration access by use of tunnels or other practical means; Replace fresh drinking water for wildlife when natural water areas are removed or blocked. To the greatest extent possible, prevent street water runoff from flowing into natural or blucline streams. 1.2.3 In conjunction with local Existing Community Ongoing Development schools, environmental groups Program Development review fees; and volunteers, the City may Director; park funds participate in environmental developmentreview educatioaprograms. bodies 1.2.4 Take an active role in pursuing Existing Community Ongoing Development the preservation of Program Development review fees; environmentally sensitive Director; park funds canyon areas in their natural developmentreview state. bodies 1.2.5 To the greatest extent possible, Existing Community Ongoing Development providefor preservationof flora Program Development review fees; and fauna. Director; park funds developmentreview bodies Objective 1.3 Maintain a system of recreation facilities and open space preservation which meet the active and passive recreational needs of Diamond Bar residents of all ages. DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - REVISED JULY 25, 1995 MMP -III -4 Strafegy -. tatrt3 :: Respaav6l£ Agency- _ Tirr�mg ,, :- Ftu►I n 8 1.3.7 Develop recreation facilities New Program Parks and Recreation Complete General fund; emphasizing active and passive Director; Parks analysiswithin development recreation areas. The Commission 6 months of review fees; development of a community General Plan park funds center, the acquisition of adoption traditional neighborhood parkland including community athletic fields should be pursued. • Improve and enhance existing recreation areas. • Pursue joint public/private development of recreation facilities. • Develop and maintain a comprehensive inventory of recreation facilities and update the facilities to ensure that the City's needs are being met. • Actively pursue land acquisition for parks. • Pursue acquisition of various hillside areas for natural parks. • Initiate a program of identify ingenv iro nmental ly significant areas in the City and the Sphere of Influence, and analyze the possibility of protecting any unique or significant environmental features of such areas. • Pursue protection of environmentallysignificant areas. • Pursue development of an integrated trails system within the community. 1.3.8 Work with property owners and Existing Parks and Recreation Complete General fund; neighboringjurisdictionsto plan Program Director; Parks master plan development and locate an untreated potable Commission within 1 year review fees; water reservoir in the upper of General parkfunds Tonner Canyon/Tres Hermans Plan adoption Ranch area. Planning should encourage and emphasize recreational uses and facilities that could be developedon lands surroundingthe reservoir. DIAMOND BAR GENERAL PLAN IMPLEMENT'AT'ION AND MII'IGmim MONITORING PROGRAM MAY 5, 1995 - REvism JULY 25, 1995 NDAP-111-6 Strate83tst�s .......ItesPantibl%AgentYfmtn Fundiri 2.1.2 Prepare ordinances that allow New Program City Engineer; Ongoing Development for the implementation of Community review fees feasible water conservation Development technologies into now Director; developments, such as, but not developmentroview limited to, self-closing valves, bodies installation of hot water lines, or other technology. 2.1.3 Consistent with State law, Existing Community Ongoing Development encourage the use of primarily Program Development review fees drought-tolerantplants, efficient Director; design in landscape application, developmentreview and reclaimed water systems. bodies a. As part of the City development review of landscaping plans, discourage installation of large areas of lawn or turf, or limit installations to areas that require the use of grass, where feasible. b. Where domestic water supplies are used in the irrigation of turf areas, encourage the use of drought tolerant vegetation. c. To the extent possible, encouragethe preservation of existing native trees and shrubs, as established plants are often adapted to low water consumption. f, Requireresidentialbuilders to provide information to prospective buyers of new homes within the City of Diamond Bar regarding drought -tolerant planting concepts. g. Require non-residential builders to provide information to prospective buyers or tenants within the City of Diamond Bar regarding drought -tolerant planting concepts. It. Where possible, require the extensive use of mulch in landscape areas to improve the water -holding capacity of the soil by reducing evaporation and soil compaction. DIAMQND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - REVISED JULY 25, 1995 MMP -III -8 $1sae8y .. ,... : ............ :Status RespmasthleeuCY.: 'g __.. Eunduig._ ; Use appropriate building shapes and locations in order to promote maximum feasible solar access of individual units. Design individual buildings to maximize natural internal lighting through interior court wells, interior court areas, skylights, clerestory windows, and energy efficient building shapes. Use canopies and overhangsto provideshade to windows during summer months, while allowing for reflection of direct sunlight through the windows during winter months (care should be taken to assure that overhangs and canopies do not prevent sufficient light for daytime purposes). Incorporate the use of drought tolerant deciduous trees in landscaping plans, especially near buildings and around expanses of paved areas. Incorporate drought tolerant deciduous vines, trellises, and canopies to shade south and westward facing walls, to cool them in summer months. Locate trees and hedges planted close to buildings so as to channel beneficial cooling breezes through openings. 2.2.3 Where possible, minimize Existing Community Ongoing Development reflective surfaces (i.e. parking Program Development review fees lots) on the north and cast side Director; of buildings; alternatively, developmentreview where parking areas must be bodies located to the south or west of buildings, provide additional landscaping to reduce heat gain. DIAMOND BAR GENERAL PIAN IMPLEMENTATION AMD MMGATION MONITORING PROGRAM MAY 5, 1995 - kumED JULY 25, 1995 MMP -III -10 .:: ,........ .... . RPalm .Aen 'g urdmg:r: Z2_ 10 Increase public awareness of New Program City Manager'soffice Initiate. public General fund energy conservation technology information and practices by the within 6 dissemination of information months of that describes energy General Plan conservation practices for adoption; community members. This will ongoing encourage ongoing thereafter communication and the generation of ideas, plans, and programs for the future developmentof Diamond Bar as an energy efficient city. Objective 2.3 Reduce overall local energy consumption by promoting ej�icient land use patterns which reduce the amount of vehicular travel. 2.3.1 Land uses in the City will be Existing City Council, upon Ongoing General fund; planned to reduce vehicle miles Program Planning Commission development traveled between compatible and recommendation; review fees related uses, such as home- Community shopping, home -office, home- Development school, etc. Director; developmentreview a. This will apply to mixed- bodies use Planned Developments in particular when planning and reviewing new land uses. 2.3.2 Design and implement a New Program City Council, upon Ongoing Development citywide system of bikeways Planning Commission review fees and pedestrian traits as recommendation for non-polluting circulation General Plan alternatives. Objective 2.4 Cooperate with and encourage local educational, governmental, and private organizations in the development and use of new energy technologies that are deemed environmentally safe. 2.4.1 Maintain open communication Existing Building Official Ongoing General fund with other local, regional, state Program or federal agencies regarding the evaluation of current energy problems and state-of-the-art technologies and practices. DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - ltHMM JULY 25, 1995 MMP -IIT -12 Strategy . aStahtS itespansrble Agency. 'I�tng' .:, ?Funding 2.5.3 Reduce wasteful packaging of New Program City Manager's office Ongoing General fund products sold in the City through educational and technical assistance which emphasizes the reduction of non -recyclable products, replacement of disposable materials with reusable materials, and the purchase of repairable products. 2.5.4 Implement a mandatory New Program City Manager's office Initiate within General fund; Citywide recycling program 1 year of franchise fees including residential curbside General Plan collection and voluntary on-site adoption programs serving multi -family, commercial and industrial generators. 2.5.5 Educate residential, commercial New Program City Manager's office Initiate General fund and industrial generators about information source reduction and recycling within 1 year programs and encourage their of General participation by developing a Plan adoption; promotional campaign which ongoing informs them about diversion thereafter programs, identifies opportunitiesfor participation in such programs, and provides motivational incentives to increase participation. 2.5.6 Require commercial and Existing Community Ongoing Development industrial generators to develop Program Development review fees and implement a source Director; reduction and recycling plan developmentreview tailored to their individualwaste bodies streams. 2.5.7 Promote the reduction of the Existing City Manager's Ongoing General fund amount of yard wate generated Program office; Parks and by public and private residences Recreation Director; through ongoing promotion of Parks Commission greenwaste by on-site composting of leaves and other organic materials in a manner that is safe and clean. 2.5.8 Designate City held open space New Program City Council, upon Ongoing General fund and public facilities as "green Parks Commission zones" and conduct an recommendation; aggressive pursuit of existing Parks and Recreation and potential City uses for Director; Parks compost produced from locally Commission generated yardwaste such as park and median sites. DIAMOND BAR GENERAL PLAN IMPLEWNTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - REvtstD Itn.Y 25, 1995 MMP -III -14 2.6.2 An Open Space Plan will be Existing City Engineer, Ongoing General fund; prepared to identify areas which Program Community development will comply with Government Development review fees Code Section 65560 that Director, encompasses the four principal development review categories. natural resources; bodies managed production of resources; outdoor recreation; and public health and safety. • Identify open space land necessary to guarantee the availability of land for preservation of plant and animal life, production of food, scenic beauty, outdoor recreation and natural resources • Discouragepremature and unnecessary conversion of open space land to -urban uses • Assure that the interests of all people are met in an orderly growth and development of resources for the promotion of the general welfare and protection of the public interest in open space land DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - REmED JULY 25, 1995 MMP -III -16 .: StrategJ`.. Status..... po�as�6te Agent' .. ?T>mtng > Vmift 1.2.1 As a prerequisite to new development Existing City Engineer Ongoing Development or the intensification of existing Program review fees development, ensure that a drainage study has been completed by a qualified engineer, certifying that the proposed development will be adequately protected, and that implementation of the development' proposal will not create new downstream flood hazards. 1.2.2 In coordination with the Los Angeles New Program City Engineer Initiate roaster General fund; County Public Works Department, plan within 2 Development develop and maintain a master plan yearn of review fees of drainage, including an inventory of Gencrat Plan existing facilities, and present adoption development plans, to adequately assess existing and future flood control needs and improvements within Diamond Bar. 1.2.3 Prepare a capital improvement Existing City Engineer Ongoing General fund; program for flood control Program Development improvements needed to complete a review fees master plan of drainage. This schedule will be coordinated with improvement plans by the County and address funding and timing of prioritized improvements. Objective 1.3 Require thatpropertiesin and adjacent to wildland areas are reasonablyprotectedfrom wildland fire hazards without degrading the viability of natural ecosystems, providing a balance between removal of flammable vegetation, introduction of fire resistant vegetation, and preservation of natural vegetation. 1.3.1 Where development is proposed Existing Community Ongoing Development within areas potentially subject to Program Development review, fees wildland fire hazards, ensure that the Director; Consolidated Fin: District has the development review opportunities to review the proposal bodies in terms of its vulnerability to fire hazard and its potential source as a source of fire. Ensure that Fire Department recommendations regarding mitigation of firs hazard risks are addressed. DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - REvisFD JULY 25, 1995 MMP -IV -2 Strategy - Sfatus Respoasile Agencyuttutg > 1 `untiuig Objective 1. S Minimize the risk and fear of crime through physical planning strategies. Create a high level of public awareness and supportfor crimeprevention. 1.5.1 Refer proposals for new Existing Community Ongoing Development development, where appropriate, and Program Development review fees for the intensification of existing Director, development to the Sheriff's development review Department for review. bodies 1.5.2 Promote the establishment of Existing City Manager's Ongoing General fund neighborhood watch and business Program office watch programs to encourage community participation in the patrol of neighborhood and business areas, and to facilitate increased awareness of potential criminal activities. Objective 1.6 Promote the provision of adequate medical and emergency services to Diamond Bar residents. 1.6.1 Coordinate with appropriate agencies Existing City Manager's Ongoing General fund for the provision of evacuation and Program office ambulance services within acceptable service levels and response times. 1.6.2 Investigate the need and feasibility of New Program City Manager's Complete General fund locating a major medical facility office investigation within the City of Diamond Bar. within one year of General Plan adoption Objective 1.7 Implement effective emergencypreparedness and responseprograms. 1.7.1 Coordinate the City's disaster Existing City Manager's Ongoing General fund preparedness plans with the State Program office Office of Emergency Management, County, schools, and other neighboring jurisdictions, and participate in the development of a regional system to respond to daily emergencies and major catastrophes. 1.7.2 Integrate the City's disaster pian and Existing City manager's Ongoing General fund community resources into municipal Program office emergency management, including a list of local resources such as personnel, equipment, material, specialized medical and other training, and auxiliary communications. 1.7.3 Provide areawide mutual aid Existing City Manager's Ongoing General fund agreements and communication links Program office with adjacent governmental authorities and other participating jurisdictions. DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONrrORING PROGRAM MAY 5, 1995 - Revtsm ]uLY 25, 1995 MMP -IV -4 Strafegy Stattr Aesponsi)3€e Agency 'Tlmlag Funning 1.9.4 Include trip reduction requirements New Program Community Complete General fund; consistent with SCAQMD Regulation Development ordinance for Development XV and the requirements of the Los Director; City public review fees Angeles County Congestion Council, upon hearings Management Plan in the development Planning within six code with the goal of reducing home- Commission months of to -work trips by facilitating and recommendation General Plan participating in the following adoption programs: • Incorporate design measures into new development and, where feasible, into existing developments proposed for intensification, including preferential panting areas for car and van pools, employee drop off areas, secure bicycle panting areas, bus turnout areas, etc. + Disseminate information to Diamond Bar residents regarding the advantages of, and procedures involved in, ride sharing and public transit. 1.9.5 Ensure that site designs facilitate Existing Community Ongoing Development rather than discourage pedestrian Program Development review fees movement between nearby uses. Director; development review bodies 1.9.6 Require grading pians to include Existing Building Official; Ongoing Development appropriate and feasible measures to Program Community review fees minimize fugitive dust. Development Director; development review bodies 1.9.7 Cooperate with the South Coast Air New Program City Manager's Ongoing None required Quality Management District to be a office "test facility" or a laboratory for testing new aur pollution control programs where such programs can be safely conducted at no expense to the City or its residents. 1.9.$ The City will offer to local New Program City Manager's Ongoing None required governmental agencies, educational office institutions, and businesses the opportunity to test new technologies and/or programs designed to reduce air pollution, either directly or indirectly. DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - Rpmsm JvLY 25, 1995 MMP IV -6 Strategi.. '_ Status', �liespoiaslble`AgenCy :-?I'jmiug.: `::Funding 1.10.7 Where possible, encourage reduction Existing Community Ongoing General fund; of existing noise problems within Program Development Development existing development where adopted Director; review fees noise standards are being reached or development review exceeded. The City shall demand bodies that the State of Califomia install noise attenuation facilities in all noise sensitive areas impacted by County, State or Federal highways. 1.10.8 As part of future General Plan New Program Community Ongoing Development review, or every five years, the noise Development redrew fees contour map shah be updated. Director 1.10.9 Apply mitigation measures as needed Existing Community Ongoing, General Fund; to noise generators and receptors to Program Development annual Development ensure that adopted noise standards Director review fees are met and to protect land uses from excessive noise impacts. 1.10.10 Locate land uses to buffer residential Existing Community Ongoing General Fund; uses from noise and activity caused Program Development Development by non-residential uses or atreets or Director review fees highways and site buildings to serve as a noise buffer. Refer to the Land Use section to insure a smooth transition between residential and non-residential uses. 1.10.11 Ensure that land uses are located so New Program Community Ongoing Development as to meet the following standards: Development review fees (see Table IV -1 Noise Standards). If Director; new construction does proceed, a Development review detailed - analysis of noise reduction bodies requirements must be made and needed noise insulation features included in design. 1.10.12 Where new development exceeds the New Program Community Ongoing Development standards outlined within Table IV -1; Development review fees. a detailed analysis of noise reduction Director; requirements must be made and Development review needed noise insulation features board included in deaign. DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - Rmsm IuLY 25, 1995 MMP -IV -8 Sirute� : :.... Status .:..... Respnasibl�y.::: ... � .:; : :Y" di 1.1.5 Work with neighboring Existing City Council, upon Ongoing General fund; communities to encourage the Program Planning development ongoing efforts to complete Commission and review fees existing projects and possible Traffic and improvements to existing Transportation infiasstructures such as: Commission recommendation (a) Completion of SR-30 (b) Upgrade of SR-71 to freeway standards (c) Additional lanes on SR- 60; and (d) Increasing the roadway capacity of SR 142- Carbon Canyon Road. 1.1.6 Continue to seek support for Existing City Council, upon Ongoing General fund; Regional State Transportation Program Planning development improvement Program ' Conunission and review fees (RSTIP) projects as proposed Traffic and by the City of Diamond Bar Transportation such as: Commission (a) Encourage modification recommendation of the SR571SR60 interchange; (b) Support construction of HOV lanes on SRyO, from SR57 north to San Bernardino County; (e) Support construction of HOV lanes on SR 760, from Brea Canyon Road to SR57 north; (d) Support construction of HOV lanes on SR57, from Orange County to SR60; (e) Pursue additional Park & Ride facilities east of the City. 1.1.7 Encourage Orange and San Existing City Council, upon Ongoing General fund; Bernardino Counties to fund Program Planning development and construct an Commission and review fees environmentally sensitive Traffic and transportation corridor through Transportation Soquei Canyon and/or Carbon Commission Canyon. recommendation 1.1.8 Coordinate the use of land use Now City Council, upon Ongoing General fund; policies from neighboring Program Planning development communities and incorporate Commission and review fees all existing traffic data Traffic and including improvements and Transportation proposal for the regional Commission circulation system. recommendation DIAMOND BAR GENERAL PLAN IMPLEMENTAI70N AND MITIGATION MONITORING PROGRAM t MAY 5, 1995 - REVISED JULY 25, 1995 MMP -V-2 7. Strategy Stators. ` . Resasib4ge�tcy ..T din Objective 1.2 Balance the need for optimum traffic flow on City arterials within economic realities, environmental, and aesthetic considerations. 1.2.1 Prepare programs for traffic Existing Engineering Ongoing General fund control measures including, Program Department but not limited to, additional stop signs at problem intersections, tinting of stop lights, and regulation of speed limits. 1.2.2 Maintain flexibility in the Existing Engineering Ongoing General fund; cross sections and Program Department development configuration of streets within review fees topographically rigged or environmentally sensitive areas. 1.2.3 Pursue other traffic measures Existing Engineering Ongoing General fund; to enhance circulation and Program Department development transient traffic movements. review fees Objectvve 1.3 Maintain the integrity of residential neighborhoods. Discourage through tin, f ic. 1.3.1 Prevent the creation of new Existing City Council, upon Ongoing General funds; roadway connections which Program Planning development adversely impact existing Commission and review fees neighborhoods. Traffic and Transportation Commission recommendation; Engineering Department 1.3.2 Implement traffic control Existing City Council, upon Ongoing General funds; programs in 1.2.1 to reduce Program Planning development and divert through traffic. Commission and review fees Traffic and Transportation Commission recommendation; Engineering Department 1.3.3 Design new developments and Existing City Council, upon Ongoing Development their access points in such a Program Planning review fees way that the capacity of local Commission and residential streets is not Traffic and exceeded. Transportation Commission recommendation; Engineering Department DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - RMS1D JULY 25, 1995 MMP -V4 d. `:Funding GOAL 2 Provide a balanced transportation system for the safe and efficient movement of people, goods and services through the City. Objective 2.1 Maximize the use of alternative transportation modes within and through the City to decrease reliance on single passenger automobiles. 2.1.1 Maximize the availability and Existing City Council Ongoing General fund use of public transit service. Program 2.1.2 Investigate the feasibility of New Planning Department Ongoing General fund establishing a local transit program system. Support privately funded local transit systems for seniors and youths. 2.1.3 Support meed -use Existing Planning Ongoing General fund; developments to maximize Program Department; development transportation efficiency. development review review funds bodies 2.1.4 Pursue a cooperative effort Existing Planning Department Ongoing General fund with Caltrans and regional Program transit providers to develop a major intermodal transportation facility at the proposed Metrolink Station near Brea Canyon Road and State Route 60. 2.1.5 Encourage participation in Existing Planning Department Ongoing General fund carpools through the used of Program City publications and public displays'- isplays:2.1.5 2.1.6Coordinate to the extent New Planning Department Ongoing General fund possible with neighboring program cities in the development of a Transportation Demand Management (TDM) plan. 2.1.7 Work with Caltrans to build Existing Planning Department Ongoing General fund new park-and-ride sites, and Program expand existing park-and-ride facilities. 2.1.8 Maintain, expand and upgrade Existing Parks and Recreation Ongoing General fund; the system of bicycle routes - Program Commission; Parks Development connecting residential areas to Director fees major community attractions utilizing current City design guidelines. Upgrades of the current system will include investigative means to improve signing and molting of bikeways. The City shall develop a master plan of bikeways. DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - REvisED JULY 25, 1995 MMP -V-6 Sfrateg „Status . iLespbnsrbte.Agency ;Tog :.rttnaing 3.1.2 Improve arterial mid -block Existing Engineering Ongoing General fund segments to provide average Program Department daily service levels of "C" or better to prevent use of local and collector streets as alternate routes 3.1.3 Improve intersections in the Existing Engineering Ongoing General fund City which have peak hour Program Department traffic service levels worse than "D'; where feasible, these improvements should be made within existing right -0f --way. 3.1.4 Maintain a pavement New Engineering Ongoing General fund management system and Program Department maintenance program for all public roadways throughout the City. 3.1.5 Develop a signal system New Engineering Establish General fund; management system and Program Department system roadway maintenance program for all within five improvement traffic aignals throughout the years of funds; City. General development Plan review fees adoption 3.1.6 Consider all opportunities to Existing Planning Ongoing General fund; expand and maintain Program Department; development pedestrian access routes development review review fees throughout the City. bodies 3.1.7 Synchronize signals on all New Engineering Ongoing General fund; major roads throughout the Program Department development City of Diamond Bar (See review fees Circulation Element Figure V- 2) and adjacent communities. Objective 3.2 Explore all available opportunities and mechanisms forfunding transportation improvements. 3.2.1 All new development shall be Existing Planning Ongoing Development required to provide mitigation Program Department; review fees measures. Such measures development review could include improvements or bodies traffic impact fees. 3.2.2 Solicit State and Federal funds Existing City Council; Traffic Ongoing General fund to improve area freeways to Program and Transportation eliminate use of local streets Conurission; as part of the freeway system. Engineering Department 3.2.3 Consider implementing a New Engineering Determine General fund traffic impact fee system. Program Department feasibility within one year of General Plan adoption DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 - REvism 7uLY 25, 1995 a MMP -V-8 Strategy =Status ;Responsible Funding Objective 4.2 Provide adequate parking for all types of hoot use within the Ory of Diamond Bar. 4.2.1 Use existing parking demand Existing Engineering Ongoing General fund data sources to update City Program Department Code requirements pertaining to Ping, Particularly the provision of sufficient parking for land uses generating a high demand for parking. 4.2..2 Encourage school districts to New Traffic and Ongoing General fund improve parking and loading Program Transportation facilities for public schools to Commission; minimize the impact on the Engineering circulation system. Department 4.2.3 Establish parking requirements New City Council upon Prepare General fund for housing to a level Program Planning standards for consistent with the occupants Commission inclusion in transportation needs. recommendation; the Planning Department Development code within 6 months of General Plan adoption. 4.2.4 Strengthen off-street parking New City Council upon Prepare General fund codes for new residential Program Planning standards development in order to Commission for increase the number of off- recommendation; inclusion in street parking spaces. Planning Department the Developme nt code within 6 months of General Plan adoption. DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITOiUNG PROGRAM MAY 5, 1995 - REV sm 7uLY 25, 1995 MMP -V-10 StrateBY. Status_ ;Respons! ...e Age cY :���►n8: IFund;ng 1.1.5 Coordinate the long-term provision of Existing City Engineer Ongoing General fund; utility services, including water, Program development . wastewater, sewage, electricity, natural review fees gas, solid waste, M. to assure adequate future levels of services for City residents. (a) MonitorplansbytheMetropolitan Water District and City of Industry to locate a water reservoir in upper Tonner Canyon. (b) Support development of appropriately sited, environmentally sensitive, solid waste treatment facilities which do not impact resident's quality of life. 1.1.6 Require all new housing subdivisions New Program City Engineer Complete General fund; be connected to a public sewage within 1 year development system. of General review fees Plan adoption. DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAY 5, 1995 MMR -VI -2 trsteSY . Status'tespanstble AgeatCY _, Ti rsing -Funding objective 1.4 Enable, through appropriate zoning and development regulations, the provision of cultural facilities, such as educational institutions, museums, and performing arts facilities, to meet the needs of Diamond Bar residents. 1.4.1 Pursue the acquisition of a site and Existing Parks and Recreation Identify site General fund; development of a civic center, Program Director; Parks within 6 development including a multi-use community Commission months of review fees center. General Plan adoption; identify finance mechanism within 1 year thereafter 1.4.2 Monitor plans of the university of Existing City Manager's office Complete General fund California to locate new campuses in Program initial Diamond Bar. discussions with UC and CSUC within 6 months of General Plan adoption; ongoing thereafter 1.4.3 Work with Los Angeles County to New Program Parks and Recreation Ongoing General fund; insure adequate library services are Director development provided. review fees 1.5 Stimulate opportunitiesfor a population which is diverse in ternts of age, occupation, income, race, interests, and religion to interact, exchange ideas, and establish and realize common goals. 1.5.1 Retain and provide community social Existing City Council, upon Ontoing General fund; gathering places, including active and Program recommendationof development natural park lands and one or more Planning Commission review fees community centers. In private commercial and office complexes encourage the development of plaza areas. i 1.5.2 Maintain a public information program New Program City Manager's office Program to be General fund to inform 'residents of community established events. with 6 months of General (a) Whenever possible, establish Plan adoption permanent locations and regular dates for community events to improve attendance. (b) Encourage a "Community Calendar" as part of the local cable television programming to inform residents about the times and locations of upcoming community events. DIAMOND BAR GENERAL PLAN IMPLEMENTATION AND MITIGATION MONITORING PROGRAM MAYS, 1995 MMP -V1-4 2.2.1 Conduct a periodic review of user Existing City Manager's Annual General fund charges, development fees, and public Program office; Finance facilities impact mitigation fees in Director accordancewith California Government Code Section 66000 et al, (AB1600) to ensure that the charges are consistent with the costs of improvement and maintenance, and that public services and facilities are being expanded in a cost-efficient manner. Objective 2.3 Promote public and private services and amenities to the community. 2.3.1 Identify and pursue opportunities for New Program City Council, upon Ongoing General fund; private provision of services and Planning Commission development facilities within the City of Diamond recommendation; review fees Bar, including joint public/private Community efforts. Development Director; development review bodies 2.3.2 Explore joint or cooperative use of Existing Community Complete General fund; facilities owned or constructedby other Program Development investigation development public agencies. Potential locations Director; Parks and within 6 review fees include, but arc not limited to, the Recreation Director; months of Pomona Unified School District high City Manager's office General Plan school site in the Tres Hermans area; adoption; Site "D" owned by the Walnut Valley implement Unified School District off of Diamond findings within Bar Boulevard east of the 57 Freeway; 1 year South Pointe Middle School; and the thereafter Walnut Valley Unified School District school/office site on Lemon Avenue just north of the 60 Freeway, 2.3.3 Provide regular information to citizens Existing City Manager'soffice Ongoing General fund regarding current issues, public safety Program information, resource management information, city services, public meeting schedules, hazardous material collection programs, etc. ' DIAmo" BAR GENERAL PLAN LNwLE1VI ci NTAnoN AN>)1V MGA noN MONTrowm PROGRAM MAY 5, 1995 MMP -VI -6 APPENDIX E - RESPONSE TO COMMENTS • C"<W" STATE DEPARTMENT OFF TRANSPORTATION, DISTRICT 7 - Letrer from Mr. Why0rd Melton dated Se�otemner 19, 1991 Cone 1: `Caltrans is currently considering High Occupancy Vehicle (HOV) lanes for Route 57 (Orange Freeway) and Route 60 (Pomona Freeway). Also, Caltrans is in the process of planning to upgrade Route 71 (Corona Expressway). to a freeway. Response 1: Comment noted. The Plan for Physical Mobility (Circulation Element) and the Master Environmental Assessment will be modified to reflect this data. Commerd 2: 'Caltrans has several current projects on the Route 60, Pomona Freeway. The westbound Diamond Bar Blvd, ramps will Include installation of protected left turn phasing onto southbound Diamond Bar Boulevard. The westbound ramps at Brea Canyon Road will include the installation of protected double left turn pockets on northbound Brea Canyon Road. The westbound Grand Avenue ramps will Include adding a fourth leg to the intersection and widening the Off•romp from two to three lanes.' Response 2: Comment noted. The Plan for Physical Mobility (Circulation Element) and the Master Environmental Assessment will be modified to reflect this data. Comment 3: "There is no data concerning the proposed future interchange to be built in Tanner Canyon connecting Route 57 to Route 71.' Response 3: Comment noted. The Plan for Physical Mobility (Circulation Element) and the Master Environmental Assessment will be mod"Ied to reflect this data. Comrnert 4: `The Trafflc Study for Diamond Bar Corporate Terrace proposing a traffic signal at Brea Canyon Cut-off Road and Fallow Field Drive should be included in the General Pian.• Response 4: Comment noted. The Plan for Physical Mobility (Circulation Element) and the Master Environmental Assessment wilt be modified to reflect this data. Ccimment 5• 'Any propped projects in the City of Diamond Bar that may affect the State highway system should be submitted to Caltrans for review and comments." Respa" 5: Comment noted DIAMOND BAR GENERAL PLAN EIR - RESPONSE TO COMMENTS JL r1_1"2 Corrxnent 3: "Long-term air Quality impacts from the project will result from the implementation Of General Plan policies, which encompass residential and commercial development. The Draft EIR estimates the impacts from development to be approximately 773,000 average daily trips and the corresponding congestion. The Draft EIR anticipates a slight reduction in the vehicle mites traveled (VMD due to the implementation of General Plan policies calling for planned developments to create centralized business areas and mined -use developments, instead of decentralged strip -commercial or single -use development. Nevertheless, the overall traffic impacts of implementation will still be significant.` Response 3: The General Plan does identify circulation impacts as being significant, but indicates they are mitigable as long as planned roadway improvements, including those to adjacent freeways, are made as planned. Unfortunately, freeway improvements are not under the control of the City, and so it is difficult to predict the actual timing of mitigation of locat traffic problems relative to regional traffic impacts and improvements. Comment 4: 'The Draft EIR states that the ozone levels exceeded state standards on over 100 days during each of .the last three years (10090 111-4). It adds that local topography, climate, wind, and air movement paitems tend to concentrate air pollutants along the freeway corridors (1-57 and 1.60) In the Diamond Bar area. Several local Intersections already experience slgniftcantty elevated levelt of air Pollutants during peak driving hours. With Increased congestion. several traffic intersections would operate at less than acceptable levels of service., Regxxm 4: Comment noted, C°nrrwr* s: "fie City should consider ft option of addressingpo#entlat air quality impacts through General plan goon and policles. Those g� and policies, for example, may commit to certain standard types of mifigatlon to reduce construction- and operational -related air quality impacts. Mitigation for construction -related activities may be included as standard development practices (see Table 1 for examples: these sample mitigation measures should be modified into General Plan potkies) Response 3: fie General Plan already does address both 10'Werm (development) air temporary (construction) and for Public Health and Sat For exampie. Strategy 1.9.6 in the Plan etl/ esigned to mWmlze tugitive dust from corntructtorr. while Strategy 1.9.4 In the same section addresses the *dObhhvnenf of o transportation demand management, as directed by the Air QUOft Management Plan. Cormier* 6: 'Inctusiion of air quality policies and programs may act as mitigation for the Overall General Plan buildout scenarb if the policies contain specific goals and action dates. SCAQMD encourages the adoption Of m��lc standard mi"gotion memures, policy statements, objectives and goals wlf M the Air Qudtty Elemem Old other elements of the General Plan to help facilitate the attainment of federal and state amblent.atr gUCW standards. DisMct staff is available to =W in this endeavor.' DIAMOND BAR GENERAL PLAN BIR - REsPONSE tO COMMENTS 1.im Comment 3: 'Are the growth management goals and polices compiled with?" Response 3: The General Plan and its EIR are consistent with the growth management goals contained in the Growth Management Plan, the Regional Mobility Plan, ana the Air Quality Management Plan. Comment 4: 'Are the Jobs/Housing Balance performance goals being met?" Response 4: The General Plan and its EIR aro consistent with the jobs/housing performance goals contained in the Growth Management Plan. Comment 5: 'Is housing availability discussed In terms of the income and wage levels of the locat work force?" Response 5: Housing availabillty is discussed In terms of Income and wage levels of the local work force. both in the Master Environmental Assessment, the EIR, and the Resoonse to Comments on the letter by the California Department of Housing and Community Development (MCD) In this document. Comment a: "What will be the cumulative Impacts of the project in the subregion? How is this related to the Growth Management Plan forecast at the expected date of project completion of phase cam01e11wr Response b: The Cumulative Impacts section of the EIR (section Vg addresses regional Impacts. For information on the Growth Management Plan, the see responses for comments 1 and 2 of this letter. Corstrnent 7: We the provisions of the Alr Quality Management Plan Implemented at the local levet and within the subregion? What are the air quality impacts of the project? Are they being addressed?" Response 7: See the appropriate responses to comments made already by the South Coast Ak Quailty DlsMct. Comment 8: "For any project with transportation corridor -level impacts, what are the long-term impacts7' Response 8: See the appropriate responses to comments made already by Co Frans. Cormterd 9: "What assumptlans are used in GdWK t(V the total trips generated by the project?' Response 9: The Pion for Physical Mobility outfktelit the trip generation assumptions used to develop the traffic model for kacd chculation. Standard trip generation rates were used to ultimate. trip type, length, and d(rirlbutlom C awned 10: "What are the rek zted vehicular embsbr r Response 10: The EIR estimates that the City wlN generate 49.7 torts of alr pollutants per day at buildout, of which atmod alt (99 percent) comes from mobile Sources. DIAMOND BAR GENERAL PLAN EIR' - RIESPoNSE To COMMENTS Comment 15: 'All projects must state the following: whether they are included in the Regional Transportation Improvement Program: whether they are consistent with local planning documents: whether they are identified as constrained or unconstrainea in the Regional Mobility Plan: whether they are consistent with the specific policy elements of the Regional Mobility Plan, Section IV Response 15: The requested analysis has been included in the EIR and the Master Environmental Assessment. Comment 16: 'What are the impacts (if any) of the project on: water, wastewater treatment, solid and hazardous waste. energy, or school focilifies." Response 16: See the analysis related to each topic in Section IV of the EIR. - LOS ANGIM COUNTY SOLID WASTE MANAGEMEM DNISION - Letter from Michael J. Boh/ander dated September 4, 1991 CcwTwn of 1: 'The County is not solely responsible for regional waste management disposal planning in accordance with Aid 939. Reglonai landfills are a solution to the solid waste management disposeil problem, however, AS 939 clearly Identifies that local agencies shall promote the tollowhg waste management practices In order of priority, 1) source reduction. 2) recycling and composting, and 3) environmentally safe transformation and environmentally safe land disposal at the discretion of the city or county.• Response 1: See the related additional goals. objectives, and strategies provided by Troy 8utzloff in this document. Comment 2: 'Page N-3 - Third paragraph reference to flood control system should Include reference to the eXIsting Stormwater/Urban Discharge Permit for Los Angeles County and Co•Permittees. This Permit from the State and EPA may include 'surprises' for future budgets If not considered. The Federal Clean Water Act 1987 Amendments also impact Industrial and construction permitting by the State.' Response 2: Comment noted The Master EnvironmenfatAssessment WU be revised to Include Infatr Kdlon on the new Starmwater/Urban Discharge Permit process. and the fact that future City budgets may be affected by flood control requirements related to this Permit. Comment 3: 'Permit acthrittest may be adequately covered relative to Goals. Objectives and tmp(ertentatton Strategies (Pages N. 4 through 8) K the Plan recognizes the existence of the Permit.` Regx rue 3: Comment noted The Plan for Public Hearth and Safety requires a capital Improvement program for flood control improvements. and the Stormwater/Urban Runoff Discharge Permit requirements can be Included in this program. Convnerf 4: '(he Plan should acknowledge that we provide State mandated underground storage tank regulation: within the City. Aho they should acknowledge our Industrial waste service contract for faced enforcement.' DIAMOND BAR GENERAL PLAN EIR - RESPONSE TO COMMENTS hW. 11 1er" Resporme 9: Comments noted Comment 10: 'A landfill article concerning landfill expansion (Nov. 28. 1990) from The Hi htander is mentioned. State complete name of publication and geographic service area. The County will be preparing the Countywide Integrated Waste Management Plan during 1992. The City of Diamond Bar must utilize an integrated approach to solid waste management within its jurisdiction including source reduction, recycling, composting, resource recovery options and planned disposal programs." Respmw 10: The newspaper is called 'The Highlander" and is the east San Gabriel Valley division of Highlander Newspapers. It serves the Phillips Ranch, Walnut. Rowland Heights, and Diamond Bar areas, and its corporate office is located at 18383 E. Railroad Street in the City of Industry. COnvrlent 11: 'Page II -R-1. Item 2a. Dfsposat - individual areas (cities) will be required to manage their own wastes locally., Response 11: Comment noted. An additional Genera plan objective and several new strategies were supplied by Troy Butzlaff with the City relative to this new Element, and are included at the end of this document. Comment 12: 'Page ii -M. Item 1 g, Disposal of Hazardous Wastes - Los Angeles County generates nearly 9-112 million tons of hazardous waste annualty.• Response 12: Comment noted. - COUNN OF LOS ANGELES DEPARMENT OF PUBLIC WORKS - Letter from Gary J. Harkey dated September 18, 1991 Comment 1: `Page it -C-1. Wastewater, Paragraph 2: The statement'It Is not known at this time lt the OCSD has adequate cMmcdy and facilities to accommodate some Portion Of sewage flows from the Clty (Scanlon 1990),' should be deleted and replaced by, 'Orange County Sm*aton District has estabilshed an official policy that flows from outside Orange County wilt not be accepted (ASL Consultants Inc. Report 1991).' - Resparue 1: Comment noted. Corrxnent 2: 'Page it -Q-3. Paragraph 1: The last two sentences beginning with 'A new pump dation ...' to the and of the paragraph Is inaccurate, and should be replaced bV. 1he Fountain Springs Pump Station has: e)Perlenced ruptures on separate occod". ASI. Consultants Inc. was asked to by the Los Angeles County Department of Public Worts to make a study and recommendations regarding thle deftclency. Based on that avatuation and recommendatton, they are preporkp the design to solve the problem and construction should be completed by the summer of 1992." Req=" 2: Comment noted. DIAMOND BAR GENERAL PLAN EIR - RESPONSE To COMMENTS Comment 5: This letter also included comments from Michael Bohlander with the County Solid Waste Management Division." Resporse 5: Refer to previous letter from Michael Bohlander dated September 4, 1991. - LOS ANGELES COUNTY FIRE DEPAWMNT - Memo from Chief Lee dated Septemt)er 10, 1991 Comment 1: 'Sse attached memo for minor corrections to Section K of the Existing Setting Report' (Master Environmental Assessment). Response 2: Comments noted. - ORANGE COUNTY ENVIRONMENTAL MANAGEMENT AG84CY - Letter from Karr A. Rigont (not dated) received October 3, 1991 Convirient 1: "Thank you for the opportunity to respond to the above referenced item, The County of Orange has no comment at this time. However. we would appreciate being informed of any further developments.' Response 1: Comment noted. UM - T142EE VALLEYS SAL WATER DISTTRICTT-- �AL AGe4= Letter from Richard Hansen dated August 28, 1951 CornffW* 1: The strategies identified for mWmtdng cornwmtion of water (PRM 2.1.1 -2.1.5) are consistent with the draft regulations currently being considered by the Dapaftment of Water Resources (DWR) to Implement AS 325, the 'Water Conservation In Landscaping Act' (enacted by the Legislature in 1990). The Act "require all cities and counties to adopt water of lent landscape ordinances, or else be subleot to the model ordinance being deed by DWR. I am forwatding a Copy of the DWR `Proposed Model Water Efficient Landscape Ordtrwanoe' under separate cover for yaw consideration. You may wish to Incarporah some of the measures Included there within the description of water conservation strategies of the Gerwat Pian.' Resporae 1: Comment noted. Portions of the `Proposed Model Water Efficlent Landscape Ordinance' will be incorporated Into the DevOOM"M Code as applicable. The ptoposed General Plan goats, objectives, and strategies effectively address the requirements of this ordinance. - WALNUr VALLEY WATER D6IRCr Letter from Edmund Bledemran dated August 24 1991 Commerit 1: 'thank you for providing the District with an opportunity to review the draft of the General Plan for the City of Diamond SIX. The Issue of water service, both !resent and future, has been recddic* portrayed In the report. DIAMOND BAR G1 NERAL PLAN EIR • -RfsloaNsE To COMMENTS 4— 1 1 m. - POMONA LUD SCHOIX DISTRICT - Letter from Patrick Leier dated September 30, 1991 Comment 1: 'fie DEIR appears to do an adequate lob of addressing the critical issues facing the District with regard to providing quality local educational facilities, As noted ire the DEIR, successful implementation of the General Plan's Plan for Public Services and Facilities (PPSF) objectives 1.3 through 1.5 and Pian for Community Deveio mant and Land Use (PCD -Lin objective 2.3 should provide the City the ability to assist the District in mitigating educational impacts.' Response 1: Comment noted. Comiment 2: "Currently, the most significant Impacts to the District are in the Tres Hermans cited, which is shown on the 'Proposed Land Use Map for Planned Development, Mlxed Use.' There is currently no development plan for this area. nor is there a Planned network of streets." Resporm 2: Comment noted. fie City Is planning to designate the Tres Hermans area as a Planned Development, and intends to work with the Pomona School District during the planning of the Tres Hermonos Ranch to assure that the street and infrastructure systems are adequate to serve the anticipated school facilities. Coavnent 3: 'If there Is significant residential development within the Tres Hermanos arm the need for another elementary school site and middle school site, or middle school expansion, is highly likety.' Regxxm 3: Comment noted. Corin wd 4: 'As noted in the DEIR, the Dlstriat Is seeking to build a new high school in the Tres HOrmanos area wrthtrt the next We years to house expected enrollment growth. A development plan is the single most important contribution which can be made to speed actual land acquisition and construction of a new high school within the City." Response 4: Comment noted. Comment 3: Page 1.0.4 should contain the following lnformattm: 'in 1991, local voters approved o multi-million dollar bond sate to fund construction of new elementary sch`Dohs the coristrucflan at a new high school, and the Improvement and rehOWation of older existing schools.' Response S: Corrlmerlt noted. Comment 6: 'Platte II -0-4. the proposed schod fabeted as a Junior Hk#VMkfdlo School, wilt be an Elementary school,' Resporw 6: ComrrmV noted, DIAMOND BAR GENERAL PLAN EIR - R13PONSE To COMMENTS Jane 1. 1998 -1- S00'lEW CAII.FORW EDISM COMPANY. Letter from R.D. lmnof dated Septe=er 24, 1991 Comment 1: 'While (the requirements of Strategy 3.3.8 in the Plan For Community Development regarding the location of utility facilities) may have minimal impacts upon Edison, developers may experience significant cost'increases due to project compliance.' Response is Comment noted. CoffwTx >t 2: (Regarding Strategy 1. 1.6 in the Pian For Public Services and Facilities) "The siting and design of energy facilifles of an electric utility is within the sale and exclusive Jurisdiction of the California Public Utillfles commission and the California Energy Commisslon as these functions are of statewide concern. Any provision that proposes to usurp this regulatory Jurisdiction. should be deleted or appropriately reworded.` Resporse 2: There was no intent to usurp or otherwise hinder the regulatory power of local utility companies. What was intended was that, as far as it is within their power. the City should seek to coordinate and Communicate with local utility companies to the degree that if Is aware Of planned foctiffles, and approximately when such facilities might be lnstc044 to getter plan overall development of vacant lands. Corr meat 3: 'Edison carr provide assistance (regcrding attemative transWrfaflon made$ such � � bum) UPOn 16qu6 t" (regarding Strategy 2.1.2 in the Pian For Physical ROWONO 3: Comment noted C MVrMtt 4: 'While the report Corr" Identt"M ft substatlons supptVkV power to the City that fofts outside its twrders, It fair to MwMm Diamond gar Substation which is wrthln the City limits. It Is Iocat*d at the north comet of Grand Avenue and Diamond Bar Boulevard,' Response 4: COmment mated. DIAMOND BAR GENERAL PLAN EiR - RE/tomol To COMMENTS June 1.1M J ADDITIONAL MATERIALS The following documents will be added !o the list of references: Brea. City of, 'General Plan,, June 17. 1986. California; State ot: California Debt Advisory Commission (COAC), 'Annual Summary 1990: The Use of Housing Revenue gond Proceeds,• November 1990. Diamond Bar, City of, 'Fee Comparison Study,• H0916 -Ireland Development Consulting Group, May 1991. Walnut, Clay of, 'GOneral Plan,' July 1978. DIAMOND BAR GENERAL PLAN EIR • RESPONIE To ComuENTs JWW 1, 1"2 .,., Sratc- of Cahforn,o 9vcitir,s T.. c t G^ on ^3 9 Ffou:Fn9e''c, Memorandum `r Mr. Tom Loftus �_ Iecttln:;Nouse September ly, 1 ,g 14CJ "Tenth Street, noon 121 , mento, C^. :!5$1: IGR/CEQA DEIR, Dimond Ear Citywide General Plan Wilford Helton - District 7 Vic. LA-50/571/71 DEPARTMENT OF TRANSPORTATION Project Review Comments SCH# 9.1041083 Caltrans has reviewed the above -.referenced document. Based on the information received, we have the following comments: Caltrans is currently considering High Occupancy Vehicle (HOV) lanes for Route 57 (Orange Freeway) and Route 60 (Pomona Freeway). Also, Caltrans is in the process of planning to upgrade Route 71 (Corona Expressway) to a Freeway. Caltrans as several current projects on the Route 60, Pomona Freeway. The westbound Diamond Bar Blvd. ramps will include installation of protected left turn phasing onto southbound ' Diamond Bar Blvd. The westbound ramps at Brea Canyon Rd. will include the installation of protected double left turn pockets on northbound Brea Canyon Rd. The westbound Grand Ave. ramps will include adding a fourth leg to the intersection and widening the off -ramp from two to three lanes. There is no data concerning the proposed future interchange to be built in Tonner Canyon connecting Route 57 to Route 71 The Traffic Study for Diamond Bar Corporate Terrace proposing a traffic signal at Brea Canyon Cut-off Road and Fallow Field Drive should be included in the General Plan Any proposed projects in the City of Diamond Bar that may affect the State highway system should be submitted to Caltrans for review and comments. Gellcr,tl 1'1.€11 Pl,fi,_ir, 11 if l!i�:r l -- i \ ..:li.0 :, ,.;C'� :f }=I_€li €-C'il::llil l'. If! IaC' •L:li ♦_:� 1!1:,.'� t1":I\C.�CI {t`�1 (i MIC � ♦ .. l :..: i . i€ < �t.�F._ .:I I,I.... � • .. .., l'... .. .' lF 1:1 .,. ��.� lJ L.4 .4, �i� .i i\ a' "' )ll I:::\Cl; 41•t .1 lic'.' !llttnIC:itI",t"Id l,[ N,:\cl"f € 1. ?to [C sta::Cl a rC.S El!', i)t'..' { { 4r • 1 1, k\.% duritt�, cath of thc: la.%[ thlec \c.lr.s (page 11I4)'. It acids that loc..I tullol_r.tphy. c,iirtate, wind, and air movement patterns tend to concetttr;►te ;air pt�lltltants.alun�, tilt frec�ia}� corridors ((-57 i[nd 1 ti()) in the Diamond Bar area. Several local intersections already experience ;i�niflc:[ntfv c°le�"ated level; of air pEllltl€ants during pdak drivil , hours. With incre:tSed con_restion. several tr.t#tic intersections wottici o)per;ate at less thall acceptable levels of �,e_rvice, The City Should consider the option of addressing potential air quality impacts thrott;h General Plan goals and policies. These goals and policies, for example, may commit to certain standard trees of rnidgatinn to reduce construction- and operational -related air gt[ality impacts. Mitigation for construction -related activities may be included as standard development practices (see Table 1 for examples; these s.tlrtple mitigation measures should be niudified into General Plan policies). Inclusion of air quality policies and programs ntay act as mitigation for the overall General Plan buildout scenario if the policies contain specific goals and action dates- SCAQ\-ID enMirages the adoption of . pecific standard mitigation measures, policy staternents, o-bjectiv`es and Ovals within the Air Quality Element and other e�_-menis of the General Plan to help facilitate the attaintltent of federal and state , Ment air duality standards. District staff is avctilable to -assist in this endeavor, Congestion Mana,Tement A number of General Plan policies have been proposed to deal with congestion management. The Draft EIR anticipates the need to improve streets and maintain u minimum level of service for ]tighway segment~ and key road intersections that may be required by the Congestion Mana'Rement Plan (CINIP). In fact, several roadway improvements are provided as mitigation measures for reducing traffic emissions in the Draft EIR. Two of these highways are considered candidates for inclusion in the CHIP network of route;. Staff recommends that a schedule for CoMpleting street improvements should be provided in the General Plan. Conti -actual arrangements with other governmental aLencies such as Caltrans and . Los Angeles County should also be discussed -in the Final EIR to ensure that the improyemet:ts are completed as scheduled. Any delay Wnuld aggravate the existing hizil emission levels, specifically, CO and NOx. - Ik .ilkWi !:C silt tIcit sly':.:! ' L:. Ik 1%;dC `kai::-,:.'°t!•r:llC' t.:l :'I iiC'\ •• r . •' `Clr``:i'.: 11CI 'l i is t r`_' C1�::.1� kr _1�l'. ... �.....� .......� tI!,t;ill rc!ic\e )!1_C)n ik;. .........:L'..' ; ji'kAL illyd I\ . I t c LI :ICCeS�,Olility to transit tir.tem. c) PI-ovide Marl: and ride faeilitieS' o Desil n sites to provide for parking cls:tces which will h't\'e access to e!ectricit,' for future electl'ICvellicle plug -'ins I. Maximize Energy Conservation o Implement energy conservation tneasu"es herond state and loco; requirements.+ - o Include energy casts to capital expenditure analvses. o Landscape with native dro€tght-resistiltltspecies to reduce \\iter consumption and to provide passivesolar benefits. o Improve thermal integrity of buildings, and reduce thermal load with :txitomated time clacks or occupant sensors. o Introduce glazes! \vindo\\-s, \y.tll insulation, and efficient ventilation methods: install win' do\v-systems to reduce thermal amain and loss. o Introduce efficient heating and other appliances, such as water heaters, cooking esltiipment, refrigerators, furnaces and boiler units. o Incorporate appropriate passive solar design and solar heaters. o Capture waste heat an(] re-employs this heat in nonresidential buildings, %%-here feasible. ` o Recvile lighting system's llectt for space during cool weather: and the exhaust system through plenums durin; +warm weather. o Ensure proper sealing of all buildings, where applict:ble. o De:isn facility entrances with vestibules, where possible. 0 !"Stall indivislually-controlled light Switches and thertnctstats to permit indil'Idtlill adjtiStnlentl. o Control mechanical systems. or equipillem with tirre clocks or computer systems. - o Impfe hent waste separation and recycling programs. tee-( to ! f- }� A."CHAEL Y P;1;ataE (DUN OF _ .y r ENVIRONMENTAL MANAGE&iENT AGENCY OCT 02 MCL 91-113 James DeStefano Community Development Director City of Diamond Bar 21660 E. Copley Drive, Suite 190 Diamond Bar, CA 91765-3117 SUBJECT: DEIR for the Diamond Bar General Plan Dear Mr. DeStefano: Thank you for the opportunity to respond to the above referenced item. The County of Orange has no comment at this time. However, we would appreciate being informed of any further developments. If you have any questions or need to contact us, please call Kari Rigoni at (714) 834-2109. Very truly yours, Joan S. Golding, Program Manager Regional Coordination Office - By c ari A. Rigoni, Sr` Pla n r CH:tk(ldnc) 1100116034423 SOUTHERN CALIFORI,\IIA g6S COMPANY Diamond Bar City Hall 21660 E Copley Drive Suite 190 Diamond Sar, California 91765-3117 Attention: James DeStefano September 5, 1991 Subject: City of Diamond Bar General Plan -Draft Environment Impact Report Thank you for the opportunity to review the above mentioned report. our concerns have been addressed satisfactorily and consequently have no objection to its approval. Sincerely, Joy Berta Technical Supervisor JB:tsr cc:File Elm Sepiember 3, 1091 Jim DeStefano Planning Director City of Diamond Bar 21660 E. Copley Drive, Suite 100 Diamond Bar, CA 91765 E'1Gi [o TO SUBJECT: DRAFT EIR FOR THE CITY OF DIAMOND BAR GEN-ERAL PLAIN Dear Jim: We have reviewed the subject document and have the following comments to offer. On page II -A-7, paragraph 5, the DEIR indicates the following statement about the lower er TonnCanyon: "... Although this area is wvith Orange County, it dill one day represent a gateway to Diamond Bar, as that portion of Tonner Canyon i0thin the City's sphere of influence is developed. This area is presently being proposed as a commercial/business center within the City of Brea. The City may ivish to work with the City of Brea to best plan for adequate planning and preservation of Tonner Canyon as a whole. Such an extensive planning effort may involve the formation of a joint study group to address ultimate land uses in the Canyon." Currently, there has not been any proposal submitted to the City of Brea for a commercial/ business center for the lower Tanner Canyon area within the Brea Sphere of Influence. The City's current General Plan indicates this area as a Rural Residential, and only a small area near the SR -57 and Tonner Canyon Road is designated as General Commercial. The City of Brea is currently undertaking a Sphere of Influence Study to determine the appropriate development for the Tonner Canyon. This study is anticipated for completion in eariv 1992. Also, please note that Sections 6.5, 6.10, and 6.11 of the Circulation Element of the DEIR do not provide any discussion. These.sections simply state '"To be completed." City Council Wayne D. Wedin Ron Isles Burnie Dunlap Carney Felson Glenn G. Parker Amor Mayor Pro Tens Councilman Coundbolafs Councfif7fall Civic & Cultural Center -Number One Civic Center Circle -Brea. California 92621-5758.714;990-7600*FAX 714.'990-225S NOTICE OF COMPLETION APPENDIX A - NOTICE OF PREPARATION NOTICE OF COMPLETION Appendix ::a•1 to S! --"e Cleanngnouse i eo0 ler;n Street_ Sacrcmenio CA ".'o,» -';tdl »G5•�bt3 SC}-ir'# (See hose oeiow) Project Title: General Plcn Lead Agency: C:. I of Diamond Bar Canlacl Person: James De Stelcno Slreet Address: 21600 E. Cooley Drive, at 100 C;ty: D;cmond gar C:, of ;,S --- phone_ 714 $d0 - 2314 COuniy: 'os f n eles Project Location: Counly: los Anaeles _C4,Nearesl Commune Cross Streets: N: Diamond Bar Assessor's Parcel No.: Tolal Acres: 13.17 7 Vrrthin 2 f�liles: Slate H Section: i wp; _ Range: +s: 60. 57 10 Waterways: 5cse: Airports: Railways: ATSF SS�_ Schools: Pomona Unif.. W01nut Valley Unif_ Document Type: CEQA r, NOP ❑ Suppil.,'SuSsequenf NEPA ❑ NC•I Other ❑ Joint Document ❑ Early Cons ❑ Elk (Prier SCH No.J ❑ C3Neg. Doc C3 Other C3 Final Document C3 Draft EIR El Draft Els C1 Other ❑ FONSI Local Action Type ❑ General Plan Update ❑General Plan Amendment ❑ General Plan Elements) ❑ Community Plan ❑ Specific Plan ❑ Master Plan ❑ Planned Unit Development ❑ Site Pian ❑ Rezone ❑ Prezone ❑ Use Permit ❑ Land Division (Sub- division, Parcel Map, Tract Mao. etc_) ❑ Annexation ❑ Redevelopment ❑ CGCStaf Permit ❑ Other Devefopment Type: ❑ Residential: Units Acres ❑ Office:Sq•K._ ❑Water Facilities: Type MGD Acres _ Employees ❑ Commercial:❑ Transportation: Type Sq•ft•— Acres _ Employees ❑ Industrial: Sq.tt._ Acres _ Employees ❑ Mining: ' g: Mineral ❑ Power: ❑ Educational: —�—� Type Wallis ❑ Recreatianaf: ❑ Waste Treatment: Type ❑ Hazardous Waste: Type ❑ Other: REVIEWING AGENCIES CHECKL)ST nesourCes Agency E�Qrtng & Woseewr.`,s Coastal COmmIS510..1 Coastal Conservancy COtOfaC10 River Board l Conservation Fish & Game Forestry •r OKce of Historic Preservation f Parks & Recreation f Reclamation _ S.F. Boy Conservation & Development Co^ -tiuion d Wafer Resources (D' ;;y Business, Transportation & Housing Aeronautics +� CotiiomiO Highway Patrol f CAL„ ANS District 7 2) 3 620.3553 Deportment of Trans panation Planning (headquarters) F Housing & Community Development +r Food & Agriculture Health & Welfare Health Services Vale & Consumer Services +� General Services d OLA (Schools) Public Review Period (lo be filled in by lead agency) Starting Dcfe Signature Lead Agency (Complete if applicable): Consuhing Firm: PLANNING NETWORK Address: 9375 N. Archibald Avenue Suite 101 CitylStaterZip: Rancho o Cucamvny CA 91730 Contact: Kent Norton - Protect Mana er Phone: 714 945 - 2738 i(EY $ _ 00cumenr sent by lead eyercv X = C'Ocurnenr sear w•y <.�, l uggevea Environmenlol Affairs -r Aur Resources Board +f APCD,,AQMD 1 California Waste Management Board SWRCB: Clean Wafer Grants SWRCS: Della Unit S'VV?CB: Water Quality 5WRC3; Water Rights ,r Regional WQCB256-7530 Youth & Adutt Corrections Corrections independent Commissions & Offices .r Energy Commission f Native American Heritage Commission f Public Utilities Commission Santa Monica Mountains Conservancy State Lands Commission Tahoe Regional Planning Agency _ Other Ending Date Date For SCH Use Only: Date Received at SCH: Date Review Starts: Dale to Agencies: Date to SCH: Clearance to: Applicant: C of Diamond Bar Notes: Address: 21600 E. Co le Drive# 100 Ciry,Slate.2ip; Diamond Bar CA 91765 Contact: James DeSlefano Planner Director Phone: 71 d 660-23 4 Yes Maybe No g. Exposure o1 people or prccerty to geologic hazards ,r1 .71 suc,tl cs earthquakes. IcncVides. macs,ices, grcund r 'allure, or similar hazards? Substantiation : everopmenl to buildout of Diamond Bar will cover over native soils in some areas. T:;e Land Use z7iement will be the policy guide for future spatial arrangements in the study area. Policies will be nslituted to ensure that uses permitted in the land use districts reflect the natural capacry of lire soil and the environment. This will minimize the exposure of people to earth-re?aced Paza!Ls. 2. Air. Will the proposal result in: a. Substantial air emissions or deterioration of ambient Q air quality? o. The creation o1 objectionable odors? ❑ C. Alteration of air movement, moisture, or ❑ 0 temperature, or any change in climate, either locally or regionally? Substantiation The population of the study area is expected to increase significantly during the fife of the plan. While policies regarding Transportation System Management will be included in the plan, increases in automobile emissions will occur. The plan will also contain policies directed at minimizing objectionable odors. I Water. Will the proposal result in: a. Changes in currents, or the course or direction of (� water movements, in either marine or fresh waters? b. Changes in absorption rates, drainage patterns, or Cl ❑ the rate and amount of surface runoff? C. Atterailons to the course or flow of flood waters? Cj d. Change in the amount of surface water in any [] Cl 0 water body? e. Discharge into surface waters, or in any alteration of �] surface water quality, including but not limited to temperature, dissolved oxygen or turbidity? f. Alteration of the direction or rate of flow of ground El waters? Yes Maybes No d. Delet'Oration to existing fish ar wrlclite ncn)ict? Substantiation .3evelopment in the C, -,'y and.`or sphere of Influencemay remove areas with native vegetation, wn;c could reduce the overall numners' and/or dive; sriy of animal species. P,-otec;.cn cf the C.; is : tc;e natural resources rs one of the goats contained in the General Plan. Polrc:es regarc:ng ,-e ,preservation of areas with natural vegetation will enhance the survival of animal species in Me Diamond Bar area. 5. -'toise. "fill the proposal result in: a. Increcses.in existing noise levels? D F-1 n b. Exposure of people to severe noise levels? El Substantiation Increased noise levels may be expected with projected future population growth, particularly from increases in automobile traffic. However, policies directed at minimizing exposure to damaging noise levels will be contained in the General Plan. 7. Light and Glare. Will the proposal produce new light or 0 glare? Substantiation Development in Diamond Bar will increase the potential light and glare. Lighting standards contained in the Zoning Code should adequately protect the public from exposure to harmful glare from lighting. 8. land Use. Will the proposal result in a substantial ❑ ❑ ❑ alteration of the present or planned land use of an area? Substantiation Future development of the Diamond Bar area will likely follow existing trends or patterns of building. Policies in the plan will ensure that proposed land uses will be compatible with existing uses and neighborhoods. 9. Natural Resources. Will the proposal result in: a. Increase in the rate of use of any natural resource? ❑ ED ❑ Substantiation Optimum utilization of all natural resources is one of tPe goals of the General Plan. Water as well as energy conservation measures are addressed in the plan. However, the quantity, rather than the rate of use, of natural resources will increase during the life of the Plan as the population increases. i Yes M� No d. Alferofions to present ocilerns of circulation or Movement of peopie ana;or goocs? ❑ 'J e. Alterations to waterborne, rail, or air frotfic? f. Increase in traffic hazards tp motor vehicles, bicyclists or pedestrians? ❑ Substantiation ;he predicted population increase in the study area will increase automobile traffic, ;hereby placiry additional demands on the existing circulation systems. Also, future developments in the study area may require an increase in the amount of land allocated to automobile parking. This may be reduced if an effective Transportation Demand Management System is implemented, without alternatives to the automobile, the existing circulation system may be constrained due to the Projected traffic of the study area and the region. 14. Public Services. Will the proposal have an effect upon. Of result in a need for, new altered governmental services in any of the following areas: a. Fire protection? 0 ❑ ❑ b. Police protection? a ❑ ❑ c. schools? ❑ ❑ ❑ d. Parks or other recreational facilities? 13 El a. Maintenance of public facilities, including roads? 0 ❑ ❑ f. Other'governmental services? ❑ ❑ ❑ Substantiation The predicted population increase of the study area will place additional demand on public facilities and services. Policies to coordinate future development with the carrying capacity of existing facilities are contained in the General Plan. 15. Energy. Will the proposal result in : a. Use of substantial amounts of fuel or energy? ❑ 0 ❑ b. Substantial increase in demand upon existing ❑ ❑ ❑ sources or energy, or require the development of new sources of energy? Substantic lon Policies to conserve energy are contained in thGeneral Plan. .With the predicted population e increase in the study area and the development of housing and support services to accommodate this population, an increase in the amount of energy consumed is likely. C. Does the proposal have the octenricl to cause a PhYsical change wnFch would atfect unique ethnic cultural values? d. Will the proposal restrict existing religious or sacred uses within the potential impact area? Substantiation Preservation of cultural resources is one of the coals in the General Plan. 21. Mandatory Findings of Significance. C. Does the project have the potential to degrade the quality of the environment, substantially reduce the habitat of a fish or wildlife species. cause a fish or wildlife population to drop below self sustaining levels, threaten to eliminate a plant or animal community, reduce the number or restrict the range Of a rare or endangered plant or animal or eliminate important examples of the major periods Of California history or prehistory? b. Does the project have the potential to achieve short-term, to the disadvantage of long-term, environmental goals? (A short-term impact on the environment is one which occurs in a relatively brief. definitive period of time while long-term impacts will endu-a well into the future.) c. Does the project have impacts which are individually limited, but cumulatively considerable? (A project may impact on two or more separate resources where the impact on each resource is relatively small, but where the effect of the total of those impacts on the environment is significant.) d• Does the project have environmental effects which will cause substantial adverse effects on human beings, either directly or indirectly? Yes Maybe No 10 HII 0 FE -1 CD 0 A ID ❑ U 10 Eal Substantfatton While the effects of individual projects may be insignificant, the cumulative impacts of buildout in Diamond Bar may be significant The carrying capacity of existing facilities and the absorption capacity at buildout must be monitored closely to ensure that new developments do not place undue burden on existing facilities. If implemented properly, the General Plan can enhance the quality of life of City residents. May 7, 1991 ?qtr. James DeStefano Planning Director City of Diamond Bar 22600 E. Copley Drive Suite 100 Diamond Bar, CA 91768 SUBJECT: NOP FOR DIAMOND BAR GENERAL PLAN Dear Mr. DeStafano: Loa Ang," Col 'Uney OEPARrMENT OF REGIONAL PLANNING 320 Weal Teruo,,, SI/a,el LOS An9e.e, CaIllorn:e yW 2 974.641, . amea E Han] A.(:P Piannln9 01,ec:or SOL �■•moi 1 el IW ®I Thank you for the Notice of Preparation of a Draft Environmental Impact Report for the Diamond Bar General. Plan. While we have no comments at this time, we look forward to receiving a copy of the General Plan as well as the Draft EIR. Appropriate comments will be made at that time. If you have any comments please call the Impact Analysis Section at (213) 974-6461. Sincerely, DEPARTMENT OF REGIONAL PLANNING James E. Hartl, AICP Director of Planning Frank Meneses Section Head Impact Analysis FM: pr ~� 4 Ms. James Destefano -2- May n, 1991 Diversion, obstruction of the natural flow, or changes in ^e bed, channel, or bank of any river, stream, or lake will require nut i f icaL ion r:o the Department of. Fi rh and (',ame as called for in the Fish and Came Code. Notification should be made after the project is approved by the lead agency. Thank you for the opportunity to review and commcnt on Chi, YFrQcQ t • I f'ou have any questions, ions , � T u'es }Tease co.^.taco Krishan Lai Of our. Environmental Services staff at (213) 590-5137. Sincerely, Fred Worth3ey Regional Manager Region 5 cc: Office of Planning & Research May 13, 1991 The Planning Department City of Diamond Bar 21600 E. Copley Drive, Suite 100 Diamond Bar, CA 91765 Attn: James De Stefano Dear Mr. De Stefano: POMONA Thank you for including the City of Pomona in the review process for the City of Diamond Bar General Plan project. Please address all plans and environmental documents to my attention. Sincerely, Wes Chambers Associate Planner WC/ms Coy Hall, So So. G"ey Ave" B" 660, POMOM, U 91759, (914) 520-2173 Hr. James Destefano Hay 20, 1991 Page 2 ground shaking from earthquakes on nearby active faults could cause damage to structures within the City. The Whittier - Elsinore fault zone is the closest active fault, located only 2 miles south of the City. Earthquakes on this and other active surface faults or amidst buried fold/thrust belts, such as the Elysian Park Anticline (responsible for the 1987 Whittier Narrows Earthquake), could cause strong ground shaking to parts of the City (Hauksson and Jones, 1989; Davis and others, 1.990) . 1989; Hauksson, The Draft EIR and Safety Element should provide a map showing the location'of the major faults and earthquake epicenters relative to the City, a list of the faults most likely to cause damage to the City, and maximum credible earthquake magnitudes for those faults. Information regarding active faults in southern California can be obtained from Jennings (1975), Ziony (1985), Wesnousky (1986), Bortugno and Spittler (1986), the Los Angeles County Safety Element (1990), and Wallace (1990). Information on past earthquakes in southern California and their associated ground shaking effects can be obtained from Toppozada and others (1981), Toppozada and Parke (1982), Ziony (1990). (1985), and Wallace In addition, DMG has produced an earthquake planning scenario for a large seismic event on the southern San Andreas fault (Davis and others., 1982). This scenario can also be used by the City to determine the damage effects of this earthquake on critical facilities, power -generation facilities, and transportation systems throughout southern California. Landslidin Many of the hillside areas within the City have been identified as being susceptible to landsliding. General information on landslides and landslide susceptibility can be obtained from Durham and Yerkes (1954), Wilson and Keefer (1985), and the Los Angeles County Safety Element (1990). DMG has recently produced maps of the Puente Hills showing landslide deposits and relative landslide susceptibility (Tan, 1988). These maps could be used by the City to construct a landslide susceptibility map for planning purposes. Information from site- specific studies can also be used in the construction of this map. Liquefaction: According to Tinsley and others (2985) and the Los Angeles County Safety Element (1990), soma valley areas within the City contain sediments that may be susceptible to liquefaction. The three essential conditions for liquefaction to occur are: 1) strong seismic ground shaking., 2) loose, fine- grained sand and silt, and 3) shallow ground water. Because the first two conditions apply commonly beneath the valleys, Mr. James Destefano May 20, 1991 Page 4 Hauksson, E., and Jones, L.M., 1989, The 1987 Whittier Narrows Earthquake sequence in Los Angeles, southern California: Seismological and tectonic analysis: ,journal of Geophysical Research, V. 94, N. B7, p. 9569-9589. Jennings, C.W., 1975, Fault map of California: California Division of Mines and Geology, Geologic Data Map Series, Map No. 1, scale 1:750,Goo. Los Angeles County, 1990, Technical appendix to the safety element of the Los Angeles County General Plan, hazards reduction in Los Angeles County: prepared for the Department of Regional Planning by Leighton and Associates with Sedway Cooke Associates. Tan, S.S., 1988, Landslide hazards in the Puente and San Jose Hills, southern California: California Division of Mines and Geology Open -File Report 88-21. Tinsley, J.C., Xoud, T.L., Perkins, D.M., and Chen, A.T.F., 1985, Evaluating liquefaction potential, in J.I. ziony (Editor), Evaluating earthquake hazards in the Los Angeles region - An earth -science perspective: U. S. Geological Survey Professional Paper 1360, P. 263-316. Toppozada, T.R., and Parke, D.L., 1982, Areas damaged by California earthquakes, 1900-1949: California Division of Mines and Geology open -File Report 82-17 SAC, 65 pp. Toppozada, T.R., Real, C.R., and Parke, D.L., 1981, Preparation of isoseismal maps and summaries of reported effects for pre-19oo California earthquakes: California Division of Mines and Geology open -File Kgport 81-13., 182 pp. Wallace, R. B. (Editor), That San Andreas Fault System, California: U.S. Geological Survey Professional Paper 1515, 238 pp.. Wesnousky, S.G., 1986, Earthquakes, Quaternary faults, and seismic hazard in California: Journal of Geophysical Research, V. 91, N. 812, p. 12,587-12,631. Wilson, R.C., and Keefer, D.R., 1985; Predicting areal limits of earthquake -induced landsliding in J.I. Ziony (Editor), Evaluating earthquake hazards in the Los Angeles region - An earth -science perspective: V- S. Geological survey Professional Paper 1360, p. 317-374. Ziony, J.I. (Editor),' 1985, Evaluating earthquake hazards in the Los Angeles region - An earth -science perspectivez U. S. Geological survey Professional Paper 1360, 503 pp. z.I CALIFORNIA DIVISION! OF ,f. y1INES AND GEOLOGY" CDMG 4 NOTE GUIDELINES FOR GEOLOGIC/SEISMIC CONSIDERATIONS IN ENVIRONMENTAL IMPACT REPORTS were pfeCarea OV tr•e &v.5 On OI Mines ana Geology with the Cooperation of the Sldre VL.,j:er aeSou'CeS % rapl =Cara .o assist ;nse Who prepare ana review environmental imoaCt reporlS. -ese guicet nes will exoecite the enwronr^ental review process by IdenlifVing the potential ceoloaic C r ec x^. tion OI Cala neeaea for CeSign analysis ana Tmtl dein mShould er'S and �rw—er i :;.C:ng Spectf;c page and czar, num; ers) abatlame o me puDaC. Other lfstatementssSRO'JIa eecons aeaocurmeec as ow n or.s a ,� ' � or a, s a -a so s:a'ea. I. CHECKLIST OF GEOLOGIC PROBLEMS FOR ENVIRONMENTAL IMPACT REPORTS GEOLOGIC PROBLEMS PROBLEM ACTtViTY CAUSING PROBLEM EROSION. SEDIMENTATION, Fault htOYamant FLOODING Liquataauon Landsli0aa 011fara1n41 Compaction/ LAND SUBSIDENCE Seismic Sonlemenl EARTHQUAKE Ground Ruptuf/ DAMAGE lava Flow Ground $hekinq Tsunami . S«Chas Flapping Oua to Failure at Oems ■nd Levees Lass of Accase .OSS OF MINERAL Dapouts Covered by Changed RESOURCES 4nbUse COnd:Hans Zpmng ReatnCtlOM WASTE DISPOSAL CM1a094of GfOundvYalar LaY•t PROBLEMS Oisooaaf at ERC&v&Tod Mate., T"Wee"twn or Waste Materia - GndMrOas and MudElo.q SLOPE ANO/OR FOUP40ATION UneLeae Cur and Fill $topes tNSTA91LITY com;; M end Eapemiw Safi Cows Ina orciect of eeo"M eYanl ca Use ~f"mental oretwomei ENVIRONMENTAL PROBLEMS Ia this concius,un ooCumented in aRached 1000ns% NO I YES (over) STA:E OF CALIFORNIA THE RESOt1RCES AGENCY DEPARTMENT OF CONSERVATION For a list or geotogie maps and recons avadaCie from the California Division of Mines and Geology, write to the California Division of Mines and Geology. P O. Boa 7980. Sacramento, CA 45912. Or visit our Olstfict offices in SACRAMENTO. 2e TS "O" Sheet, (9151 "3-3116: SAN FRANCISCO. Room 2022. Ferry Building, 1415) 551 -OM; LOS ANGELES. Room 1063. 107 SOuln Broanway. {211) 620•-156D. &ONOn Of Gradmd Are" EROSION. SEDIMENTATION, Aharatgnof RunOH FLOODING UhproTaerad Drernaga Ways tner""d Imaeryrpus SufteCq Eimmian OI Grouridwetor. Gsa. LAND SUBSIDENCE Oil. Geathermei Energy HydrOCOin0e011on. Poet Ox,di is VOLCANIC HAZARDS lava Flow Arlt Fall Cows Ina orciect of eeo"M eYanl ca Use ~f"mental oretwomei ENVIRONMENTAL PROBLEMS Ia this concius,un ooCumented in aRached 1000ns% NO I YES (over) STA:E OF CALIFORNIA THE RESOt1RCES AGENCY DEPARTMENT OF CONSERVATION For a list or geotogie maps and recons avadaCie from the California Division of Mines and Geology, write to the California Division of Mines and Geology. P O. Boa 7980. Sacramento, CA 45912. Or visit our Olstfict offices in SACRAMENTO. 2e TS "O" Sheet, (9151 "3-3116: SAN FRANCISCO. Room 2022. Ferry Building, 1415) 551 -OM; LOS ANGELES. Room 1063. 107 SOuln Broanway. {211) 620•-156D. I0. What is the annual Impact on total trips generated by this project? 11. Discuss the transportation demand -management program chosen for the project. kill rr,a_ss transit, ridesharing, and other trip -reduction strategies be'promoted? Quantify the effecrs of each comporr-W of these programs. Provide an implementation schedule for each component - Identify the person or agency responsible for monitoring and adawstering the program. Who will operate the program? How will the program be funded? 12. Does the project impact a highway, either directly or indirectly? Does it include a highway in a rnitigation measure? if so: The document taus, stat, where the project includes High Occupancy Ve?ricles {HOV), o l i way, and/ or mixed -flow improvements; It must state how mitigation measures will promote the use of HOVs, transitway. and/or mixed -flow improvement: It must state whether the highway improvement is included in the Caltrans District Service Management Man. 13. Transportation improvements/projects must adhere to the following criteria: The impact of the overall project on air quality in the long term must be analyzed on a transpottadon corridor level, even if the project is phased or incrementally developed. The impact of the project on air quality must be compared with the impacts of the project alternatives, on a transportation corridor level. The alternatives must also be compared with each other. The demand -management strategies, HOV improvements, and =nsit are required to be evaluated as alternatives (and as mitigation measures if necessary). 14. ALL PROJECTS MUST STATE THE FOLLOWING: o ZN'hether they are included in the Regional Transportation Improvement Program; o Whether they are consistent with local planning documents; o Whether they are identified as constrained or unconstrained in the Regional Mobility Plan; o Whether they are consistent with the specific policy elements of the Regional Mobility Plan, Section IV. IS. What are the impacts (it any) of tate project on: Water, Wastewater treaftmt, I Solid and hazardous wage, Energy, School facilities? Environmental documents will be reviewed by SLAG at the appropriate time within the public review period, or under public hearing procedures. Please send three copies of the documents when they are heady for distribution. FOR ADDITIONAL INFORMATIONS PLEASE CALL THE SCAG CLEARrNGHOUSE (213) 236-1800 I AWW E ANEW Southern California Edison Company 60O w C LN. .A A -t:" ,E SAN DiMAS CAL,FCPNi A 91 "g May 23, 1991 4 p w OF .RE, .—GER :qtr. James De Stefano Planning pirector Dianor_d Bar 21500 E. Copley, Suite 100 Diamond Bar, CA 91755-4177 SUBJECT: Notice of preparation of a Draft Environmental Impact Report City of Diamond Bar General Plan Elements Dear Mr. De Stefano: 'riE-7cr r .. 542 ]''C This is to advise you that the City of Diamond Bar is located within the service territory of the Southern California Edison Company and that electric loads resulting from the General Plan Elements are within the parameters of the overall projected load growth, which we are planning to accommodate in this area. Unless the demand for electrical generating capacity exceeds our estimates and provided that there are no unexpected outages to major sources of electrical supply, we expect to meet our electrical requirements for the next several years. In addition, the relocation, reconstruction, rearrangement, extension, or, undergrounding of Edison's existing electrical distributing system, which may be necessitated by activities resulting from the General Plan update, will be performed by Edison in accordance with Edison's effective Tariff Schedules approved by and filed with the California Public Utilities Commission. Thank you for the opportunity to review and comment under this Notice of Preparation. Please contact me directly, should you have any questions. RDI: sj1 imhof\ditenv.dnd Very truly yours, EDUCATION CENTER / BUSINESS SER110ES Pamona UnifiedDistriclschool 6M South Guey Avenue. P. 0. Box 2900. Pomona. Cah[ornes 91769. Prone PATRJCK D. LEIER Asst. Supt.. Busincss Scrcices XaY Z T . :991 .._. fames De S_efano ` izi of Diamond Ea 21660 E. Copley ..r�-ive, 2ia.��.nd Ear, CA 91!l65 Tea :'_r. =e Stefano. ?lann._ng wrec_or Suite 100 Zn hehal-= of the ?c,;.ona Unified School, 1 am responding to ycur Notice of Preparation of a Draft Environmental Impact Report for the development Cf the Diamond Bar General Plan. - The District is out of classroom space. Most campuses have been expanded through the use of temporary relocatable classrooms to the point that over one-third of our classrooms are comprised of temporary buildings. Many of our campuses are capped and rust send new students to other less overcrowded District schools. Seginning July 1991, two schools will be implementing a multi- track year round (MTYR) schedule to 'rouse additional students, and to reduce current ove_crowding. The Board of Education has resolved to place 30% of the K-6 enrollment on MTYR by September 1992, in order to house additional students, reduce current overcrowding, and qualify for priority funding from the State School 3uilding Program. School Developer Fees are capped by law, and there are restrictions on imposing mitigation- measures on development projects in addition to -these fees. However, School Developer Fees are insufficient to provide Matching Funds to the State (to qualify for State School Building Program funding) and mitigate the effects of residential, commercial, or industrial growth. Through the above actions and the General Obligation Bond, which the District is currently seeking voter approval for, the District is striving to provide adequate school facilities; however, shortfalls are projected even if all the above act -ions are successfully executed. The District is seeking provisions in the General Plan that will insure that the school facility infrastructure is adequate to serve new development. S'A'E CF CA11FC?VrA-8US1NESS AND TRANSPORIAVC.-4 AGEvC" ?F"c •N'._^1 .moi V. DEPARTMENT OF TRANSPORTAT;CN ICS ANGELES. CA :0012 _.c= I -: y C /��x [ H or Diamond Bar trop-EIR-Initial Study; DiaMond Bar General Pian SCH : 91041083 Vic LA -VARIOUS Mr. fames Destefano The City of Diamond Bar 21500 East Copley Drive Diamond Bar, CA 91765 Dear Mr. Destefano: Thank you for including the California Department of Transportation (Caltrans) in the environmental review process for the above -referenced project. Items which should be covered for the project include, but are not limited to: A. Trip generation/distribution including the method used to develop the percentages and assignment. B. ADT, AIX and PM peak -hour volumes for both the existing and future (Year 2010) conditions. This should include the orange Freeway (SR -57), the Pomona Freeway (SR -60), the Corona Expressway (SR -71), the San Bernardino Freeway (SR -10), and, affected ramps and intersections. C. An analysis of future (Year 2010) conditions which include project traffic and the cumulative traffic generated for, all approved developments in the area. D. Consideration should be given to providing mitigation for congestion relief. Any mitigation proposed should be fully discussed in the document. These discussions should include, but not be limited to, the following: * financing * scheduling considerations * implementation responsibilities * monitoring E. Consideration should be given to requiring developer contributions or fair -share funding for transportation improvements on State facilities. State of California The Re30VrCes Agency Memorandum mate June 4, 1991 Resources Agency City of Diamond Bar 21500 East Copley Drive Diamond Bar, California 91765 Attention: James Ce Stefano From Department of Water Resources Glendale,- California a? ZC9-9Oco Subiect _:"tiotice of Preparation or DEIR for Diamond Bar General Plan, dated April 17, 1991, SCH 91041083 Your subject document has been reviewed by our Depart.,�ent of Water Resources staff. Recommendations, as they relate to water conservation and flood damage prevention, are attached. After reviewing your report, we also would like to recommend that you further consider implementing a comprehensive program to use reclaimed water for irrigation purposes in order to free fresh water supplies for beneficial uses requiring high quality water supplies. For further information, you may wish to contact ,john Pariewski at (818) 543--4609. Thank you for,the opportunity to review and comment on this report. Attachments Charles R. White, Chief Planning Branch Southern District a _4ealth and -Safety Ccde Sec: : _ es_ce^t a' V•�ater sct e=,^._. _ pr ^'b'"s ' nscallaticn cf ,rdi___ns are sat�s:ied.^3'V �•�d^�-_� ^� a`o' ces .,mess cc_ -.a:.. !ns c_ e _s e !:!stances, _he instal' cn � pater _cnservat4_at_ of ^e applia_-:ce�cust ce zcccnzan_e- �on devices on fixtures using scftened ^ccndjt ;ea water. - o Laver^Tent Code Section '°QQ specifies that lavatories in al! I'acil.tles constructed after January 1, l9$5, be equipped with self -_cs_^g f=,.ccts ;hat __�-t °;c.. ,. ho. .:ata= . To be implemented where applicable terror: 1. Suooly line pressure: ,eater pressure greater than 50 pounds Der square inch (psi) be reduced to 50 psi or less by means of a pressure -reducing valve. 2. Drinkinr fountains: Drinking fountains be equipped with self-closing valves. 3. Hotel rooms: Conservation reminders be posted in rooms and restrooms.* Thermostatically controlled mixing valve be installed for bath/shower. 4. Laundry facilities: Water -conserving models of washers be Used. 5• Restaurants: Water -conserving models of dishwashers be used or spray emitters that have been retrofitted for reduced flow. Drinking water be served upon request only.* 6. Ultra -low -flush toilets: 1 -1/2 -gallon per flush toilets be installed in all new construction. xter,'or: 1. Landscape with low water -using plants wherever feasible. 2. !Minimize use of lawn by limiting it to lawn -dependent uses, such as Playing fields, when lawn is used, require warm season grasses. 3. Croup plants Of -Similar water use to reduce overirrigation of low -water -using plants. �+. Provide information to occupants regarding benefits of low -water -using landscaping and sources of additional assistance, *The Department of Water Resources or local water district may aid in developing these materials or providing other information. r Mr. James De Stefano, Planning Director ,lune S, 1991 Page 2 FORES'T'RY DIVISION The statutory responsibilities of the Forestry Division of the Los Angeles County sire Deparzmenr include erosion control, rare and endangered species, vegetation, and t±.e Oak Tree Ordinance. Your Draft Environmental Impact Repo rt should cover these topics as well as the specific items listed below: 1. Open space vegetation management plans and management responsibilities. 2. Local tree ordinances and preservation guidelines. 3. Urban interface and drought tolerant Landscaping. 4. Use of reclaimed water for common area, open space irrigation. 5. Location of any designated SEAS. Your contact person from the Forestry Division is Deputy Forester Mike Wilkinson. If you have any additional questions, please contact this office at (213) 267-2481. Very truly yours, P. MICHAEL FREEMAN BY JOSEPH FERR.ARA, CHIEF, FORESTRY DIVISION PREVENTION, PREPAREDNESS & CONSERVATION BUREAU JF:Ic APPENDIX B - LAND USE .1 f 1-ca0 lao •a:i; be _-WORT IT l4111iC IL•7 •.. :7. 179% _n�! [i.1t 013 Y.GI•! •�: al :I r7t TT '�tH• -14rs6 Lal. Ic r.s :a 1. st,*$ tots t3V/K1 S/ 1;1.3 0.6 0.7 � 115.3 9t6 1.1 ata a.0 3 ,:e.3 Sob f.1 .. •r•SA '3.4 +:5 a.1 0 '3.4 tai +3.6 1.6 .3 '5.4 !S sr _LT .:3 +.5 3 t31.S ate] Ll •r 56,3 44! 0.0 _ 1 S6.5 493 t5.4 :t 'I.7 :34 0.0 0 1-2.T 139 3.3 +r 6.4 Ito 0.0 0 6.6 150 13.4 i3 tt :641.3 1,? a.a 7 'W.3 c:T 2.1 59 Y 0.3 3 0.0 a 3.2 3 0.0 63 tr 4t,7 ISS 0.0 a 41,1 i3S 3.2 61 Sr 'L`9,1 Lit 0.0 a !39.1 itt 3.3 62 Sr' 46.6 ;76 0.0 3 4.4 296 3.1 is ft 3m.1 79 11.5 7 St9.1 346 1.3 d: 1 a,0 0 0.0 0 0.0 0 0.0 63 ■+ 37.3 320 0.0 0 37,3 1I0 9,4 w ss 11.I 181 0.0 0 1112 ,et 3.5 .F.A 12.3 2" 414 0 14.9 201 12.1 67 st 64.5 141 0.0 a U.S 242 2.9 .t 1v,4 its 0.0 a 19.4 111 10.9 ds sr 3t1.1 tat? 141.7 71 134.1 to" 1.2 64 IF 44,5 141 0.0 1 41.1 196 4,4 0-143 33.1 499 6.6 60 Q.0 559 u.0 Ta IF 23.9 tt7 2.7 , 11.4 114 3.6 7t a 0.0 a 42.2 a 0.0 a 0.6 72 t 0.0 a 0.0 a 0.8 0 0.1 73 IF 122.3 409 0.0 0 122.5 409 3.3 74 :F 119.1 324 9.1 a 129.A 331 Id PFl3.2 its 0.0 0 13.2 161 12.2 75 If 171.0 377 4.6 2 1x1.6 379 2.2 76 st 114.1 360 37.0 a 151.1 sea 1.5 ar 4S.3 621 0.0 0 41.1 621 U.r 77 sF 2e.0 114 O.7 1 26.7 121 4.4 11F 1L2 1" 0.0 0 17.2 104 7.9 rs IF 137.1 592 3.6 1 138.9 193 4.3 MF11.8 441 a.0 0 S7.8 441 0.0 tlt.A 31,9 136 0.0 0 31.9 136 4.3 79 11 So., 74 2.3 2 52.9 76 1.4 6a IF•4a S81.0 311 141.5 m 776.5 439 0.6 at .1 0.0 a 0.0 0 0.0 0 4.0 S2 i 0.0 0 0.0 0 0.0 0 0.0 83 st 91.0 3714 0.0 0 95,0 371 4.0 64 11-4e 271.1 2SS 63.9 0 335.4 314 0.9 e5 s1 64.4 246 0.0 0 64.4 144 3.6 M wf•A 9.7 160 OA 0 9.7 160 16.$ IF 16.7 or 0.0 0 16.7 97 5.8 a7 It 271.6 734 0.0 0 272.6 774 1.1 u MF•IIM 9.6 147 0.5 0 10.1 147 14.6 69 1 0.0 0 0.0 0 0.0 0 0.0 90 1 0.4 a 0.0 a 0.0 0 0.0 9t IF 46,8 192 1.6 1 41.6 193 4.0 92 sF S1.a 224 0.0 0 SS.6 224 4.0 q e 0.0 a 0.0 6 0.0 a 0.0 94 if 172.6 438 0.0 0 172.6 qa 2.3 ow 11.5 120 0.0 0 11.1 t20 7.7 1S IF 10.6 177 0.0 0 10.6 177 3.4 N if 60.6 106 0.0 0 80.8 1" 1.0 N 15.7 1K 0.8 0 ts,7 144 9.2 97 IF 46.7 136 0.8 0 46.r 136 2.9 11 0s 0.0 a 2.0 a 0,0 a 0.0 IF TOTAL 3616.8 13112 100.6 M 3176.8 1t32e 3.0 Al TOTAL aS1.S 616 106.4 137 1061.9 173 0.7 OF TOTAL AM,1 Sa7S 11.9 60 414.1 5135 11.4 -Ap TOTAL 031.4 1013 310.5 295 5270.7 ITM 3.3 • tA14 IA91 SF . siret9 !rally 4A • rvr41 ftmideltlal Or • 4111cea 09 • GPM 6P4I9 C e ttommrslat ! • In"Irlal r • r41r1at11sl OF + aarltl•Tame11y A • 6prfutm6 AI a moblid Mon 191 • rla•4 as6i LA • Ittn1K "marlsuga Traffic i Unit I Density Zone i Type* Acres I Units (DU/ac) Comments" Map Rel j j e� 51 2 i 91 3 5 t iAF A A E 2.3 2v5 # :6 7 ,rie Daisv Aoonrre^'s # 13 ` (205 DU/12.3 acres) `i 34.5 ' 242 2.9 I ' r 1.9.4 211 10.9 Clear Creek Ccnyon NCA 1 14 (64 DUr9.8 acres) # # Cimarron Oaks I HOA 15 (14 7 DU,19 6 acres) 'I 48 I I SF 311.8 1013 x,3.5 69 Sr. 49.5 195 3.8 € MF MH 12.5 147 "'11.8 Diamond gar Estates MHP 16 + (147 DU/12.5 acres) MF 20.7 352 17.0 Hampton Court HOA 17 (108 DU/8.9 acres) (East Lycoming HOA) 18 Ii (244 DU/11.8 acres) 70 SF 28.9 113 '*4.4 # 73 SF �122.54(0)9 3.3 ti 74 SF 119.8 324 2.6 - MF 13.2 161 12.2 Canyon Park HOA 19 (161 DU/13.2 acres) 75 SF 171.0 377 2.2 76 SF 114.1 380 3.3 MF 45.9 625 13.7 Montefino HOA 20 (533 DU/33.5 acres) Diamond Gate HOA 21 (92 DU/12:0 acres) --:� 77 SF 28.0 124 4.4 MF 13.2 104 7.9 (Presado Drive HOA) 22 (104 DU/13.2 acres) 78 SF 137.1 592 4.3 MF 57.8 461 8.0 Allegro HOA 23 (184 DU/13.2 acres) Taltywood HOA 24 r 010 DU/24.2 acres) Silver Hawk HOA 25 (62 DU/10.2 acres) i Country View It HOA 26 (104 DU/10.2 acres) MF -A 31.9 ] 36 4.3 •Diamond Bar Village Apts 27 (136 DU/31.9 acres) } :n Z uj — 1 x CL :)LU LLJ / L.L ? :.: •o; ; `t •:' rid :: _ 4 (. Map Source i ALssessor's Parcel Numbers � Comments 13 Trcct 31479: a I Lot 4 8701-006-015, 036, 037 Construction prohibited b Lot 5 8701-006-038, 039 Construction prohibited c ! Lot 6 (portion) ' 8701-006-068 No known restrictions Lct 6 (portion) 8701-006-901, 902, 903 Utility easements (Edison) d Lot 7 8701-006-018 Construction prohibited i 14 Tract 350265: j Lot 83 8701-031-016 Limited to one house Lot 84 15 Tract 33182, Lot 8 8701-032-001 8701-024-008 Limited to one house Limited to one house ! 15 Mates and Bounds 8717-001-905, 906 Los Angeles County (Golf Course 8717-002.905, 906 17 Tract 31479, Lot 1 8713-001-004 Construction prohibited 18 Metes and Bounds 8702-010-25 No known restrictions 19 Parcel Map 14819: Parcel 2 93-045-004 E8293-045-005 Possible restrictions Parcel 3 Construction prohibited 20 Pcrcel Map 17244, 1Lot 2 8293-002-009 Construction prohibited 2 ] lj� Remainder Parcel 8293-001-021, 022 No known restrictions 22 TrcCt 234803:.- 3483:,- 1oi 64 . Lo! 8713-040.030 1 Construction prohibited Lot 65 8713-040-031 Construction prohibited 23 I Metes and Bounds 8713.033.001, 002, 003 No known restrictions 24 Tract 30578, Lot 188 1,8713-028-030 No known restrictions ceap 1528: 25 1� FPParcelsM No known restrictions; also r3 and 14 8713-024-001, 002, 003 subject to flood mitigation 26 Parcel Map 1528: No known restrictions: also Parcels 10, 11, & 12 8713-023-001, 002. 003 subject to flood mitigation 27 Parcel Map 1528: 8713-022-001, 002, 003, 004, No known restrictions: also Parcels 7, 8, & 9 and 005 subject to flood mitigation ( Sources of restrictions for tracts and paresl maps are recorded maps. Sources of restrictions for metes and bounds are Assessor's tax rolls. Restrictions and prohibitions were originally approved by Los Angeles County, Upon incorporation, the City gained sole discretion over F. } 1 i 5 Li C. Land Use Polley Framework Ganeral Plan policies cre stcfemenis of intended acs on. They are based on selecf;ng ,.'Or, c:,ntresting methods of dealing wtrh people, processes and problems. The major considerarlcrs �nct term me framework for the Diamond $a( General Plan land use policies are: Ac:rcn vs. Aeactron Unfortunately, most people {and cities) find it easier to respond to situations rather than plan ahead. They are then forced (nto constantly `fighting tires`. Cities that proactivety choose courses of action are in a much better position to `control their own destinies.' Long vs. Short -Term As with reactingto emergencies. 9 encies. most people, cities, and even corporations tend to think on a day-to-day or month-to-month bans, usually only what can be accomplished within that year's budget. Everyone instinctively knows that long-range planning is best, yet we often wait for the fire rather than prevent it. To the extent that the General Plan is a long-range document, it must not be so swayed by current conditions, such as cities fighting over auto dealerships, that it loses sight of long range changes. Local vs. Regional Every city wants to be independent, but feel constrained by regional, state, and federal requirements. While many of these are legal requirements, cities off en fall to explore how much latitude they have or using them to best local advantage. Each time the City develops a policy, the policy must be tested for local versus regional benefits, as well as local and regional costs (both long and short-term), to be sure that it is truly a policy that is designed to serve the City's needs. Costs vs. Benefits In ail policy decisions, ft is important to consider both the short-term and long-term costs and benefits of Implementation. This is especially difficult when benefits are Intangible. but costs may be considerably tangible. This is precisely why a vision of the community is so necessary, to serve as a framework for future decisions. Private vs. Public Al policies should be evaluated to determine if the rights they confer Rights & Responsibilities upon an Individual or the government are equal to the responsibility required to exercise that right. For example, tf it Is determined that certain open spaces in the City are to remain undeveloped, under what circumstances is it appropriate to: 1) require individual property owners to maintain them (although they do not derive any individual benefit from them), or 2) form assessment districts for broad support of open spaces. Interdependency Policies rarely affect only one particular aspect of a community. Each potter must be evaluated as to how well ft achieves the varied goats of the City. not just the one ft Is Intended. For example, a Policy that encourages many small neighborhood parks also increases pollee costs compared to fewer, larger parks. CITY .Ole DIAMOND RA! OINIlAL PLAN -- LAND Us! ALti1HATIVtii RIFORT k F� 2. Ecors wx=s Eccnomic lcctcrs C79 Cl--sely tied to land use decisions. the amount and kind Cl ncn- residenrial uses atlowea in the City will largely determine its economic health. Aside tram property taxes and per caDrta subventions, sales taxes are often the largest source ct municipal revenues. However, this post Proposition 13 pendulum may swing some other way in the future, and it is important for the City to make sound land use decisions based on the long-term puauty of the living environment, rather than on short-term economic benelils c( temporary marKet trends. CRCUCAiK)N Diamond Bar presently provides (3 number of 'short cuts' for regional commuters during periods of freeway congestion. The City may choose to continue absorbing through traffic, depending on other agencies, such as the state, to take appropriate measures to relieve regional congestion and free up local roads for predominately local use ('We didn't cause the problem, so why should we solve iM was a comment made by one committee member). However, if the City's vision or goal is to reserve most of its streets for local traffic, if should explore the opportunities and the willingness of Its residents to consider the trade- offs which go along with protecting certain streets from through traffic. 4. OPEN SPACE The preservation of open spaces, sspecialty hillside areas, is a major policy decision facing the City of Diamond Bar. There are several significant open or hillside areas left in the City, but they are under various farms of pressure to develop. Using the policy framework, the City must decide how it will meet the interrelated needs of the community. Individual property owners with large, hillside lots may wish to re -subdivide their lots and increase the number of allowable units. The individual property owner would reap an economic benefit. and more individuals would have access to hillside lots. However, there would be a decrease in the actual and perceived amount of open space that characterizes the community. There are also different forms of open space. For example, a tract might grade a slope to create a pad of homes and a recreation area. While the natural, passive open space area is lost, a man-made, active open space is created. In each case, the City must decide what type of open space best captures the community vision it wishes fo create, while recognizing the interdependency at such factors as maintenance and fire protection costs. E. OveraU Land Use Alternatives The vision of Diamond Bar will ultimatety Include determinatlons as to the kinds, the extent, and the intensity of uses to be located in the City. To a large degree. many decisions have already been made as to land use within the City. However, there are AN many large and important undeveloped parcels In the City and sphere of influence, and R Is misleading to think that there are. no or few optkxts avallable for future use. As land values increase, tt can also be expected that exisfing uses wiUconvert to other uses and intensities. Literally dozens of different land use plans can be developed with different designations on each parcel. However, for the purposes of analysis in the General Plan Environmental Impact Report, the following three (3) alternatives will be addressed in detail. These three overall land use oifernatives CITY OF DIAMOND BAN 09KIRAL PLAN -- LAND Use ALTIINATivis R[/ONT June 19. 1993 i Alternative 3 - Maximum Development ,h;s citerncf~ a lrc!uces 'tie most ;nfense development options, converting muc^ ct remaining open land to low to moderate intensity urban development. The Tres Hermcncs crea would Support a regional commercial center as well as almost 2000 homes. ;he 3romelia proaerty and Sandstone Canyon would be developed with rural and low density (3 units per acre) residential development. Several areas would be redeveloped into mixed use areas under this scenario, particularly the got! course {into slow-(ise village} and the triangular area bounded by the 57 and 60 freeways and Brea Canyon Road (into high-rise towers). In addition, the mixed use area north of the 60 freeway, on either side of $r Canyon Road, would be modified under this alternative to alleviated G conflicting uses, Mobile homes would be concentrated east of Brea Canyon, while business park uses would be located west of Brea Canyon, The most significant impact of this proposal would be to relocate the existing Walnut Creek Estates mobile home park west of Brea Canyon. Two other major aspects of this alternative are: 11 conversion of several small, older condominium developments and some larger church parcels to commercial similar to neighboring uses: and 2) allowing for the potential conversion of some older single (amity areas, built at 4.5 units per acre, to slightly higher densities (approximately 6 units per acre), under the new Low -Medium Residential land use designation. This alternative also portrays the most intense development proposal for Tanner Canyon, although even this alternative is not very intense in absolute terms. This alternative would allow up to 540 hillside residential units, 2 golf courses, and associated hotel, conference. and commercial -related uses within the canyon. A significant increase in the level of development of Tanner Canyon would require separate environmental assessments. G. Issues Matrix and Summary Data Table 1 describes each General Plan land use alternative based on the major community issues, Tables 2 and 3 summarize the land uses of each alternative, while Tables 4 and 5 compare the three alternatives in terms of both total acreage and percent of land area. Table 6 estimates the number of housing units, population, building area of non-residential uses, and projected employees of the three alternatives. Table 7 compares the previous County land use designations to those proposed for the General Pian. Figures 1-3 graphically presents the three alternatives. CITY OF DIAMOND RA! a1i11«4L PLAN .. LAND UZI ALTIENATIYI• RIPORT June 1!1. 1991 t .x 0 w 4P N H N i a ' °o o`°' °°o` r �o End ,o titer m 1 C O C UO D D (DU m 8 d_ _'000 o�>j oa�mu p C H c O w O O C G E° O G "O C G m— p U m 0 U - C J cOj p C = C O d Y O C 0O m yN0 om Bo C �� c0 ° C_ 75 O m OU— 0° 0 E U m °M o ° m o-cmL o om CL E E m c O vs r �j j m C CO U G N U C1 (D CZ a0 o'er aCLgEo >c a L E_ o_ _ m m m m E °� ° °c 0Q' CD �N O FtM) t m o - Cl. r 0 CD CL a °C) 0 CL °o c _o °m o ° o°m o H c r °o cc m m p a D N m C Q 0 O m 10 O m � 0 m y p N 3 �, O O 3 v c ° m CD U E° a N ° ' o _ o o a=� o�;oMc0cm�a� a(D Em °-1E °0Dv= a= °c_. 3a 3p aca o �0 a9 —m °$ v p a aN� mL a o V U o E E °c E=N�Gp °m: �t mr—CD L3 0 ° aoa �� ° $ a-- v m-- a �-o �m c� v o=o����� �nE'°a �3a(D '00 vsU ��= m5 ins .2 N. z m` 0 Zi o 0 mQ � o� � m asi 0 c d m C2 C c V U 0 c E Vi Cf N 0 0 m c m 010 y C o y N C -oC _.0 ,m U U Q O m m mN 0 Eo c_ O 030 � co Oa_3 Z d O �+ _O O o O c G C h U V O 'V . O~ O Q O �. N m V a m E �o E - 0Ec: ��Eo ccmccuoctctEcQio` as E N m 3 0 0 CDCD m H O L m� U a G 3 c a 'n mo G `^SCO �aC v o o _►I 0 Q 0 co g .0 NJ m CD m c G E IR a � E m - a.0 G 0 O y j 0 0 C x C m d O H E - U O O a N 3 U o L 0 m O C a.aaC-Acc C O a 0 0 I C o cm c'° `ons a OL U O(D Q 0 a L Q o - � U s rd o LL o 'b I C 0 C C N O m en E r�40 o.ccm Cq N � C m CD C 0 � Q = CV) E N `o is C OZ = .0 S C m 4 Cs:3 ca V Z Q %, q < m LAA oa cc O LAN U) ul O z N Cg C 0 m aO @ U m m m a m _O a o a m u.OazQ� H o in c'0'� � O O > o a 'a a c 0 M E CD O O O O OIL C O O 0 0 3 aR O N C O �, m U m O 0m�os E Ec�a m _ C C m 12 E t G z O H 0 Cl_ a a o - m 3: �" m E —Z-�o m oo Ea .0�mmQO� Ls— Q m N C C a m m � Z p 0 3 i r Of m a m w „�mcmm» me mI'-Co C2 q C y U C m m�mma�c o0 a m� C � Q O+ m E� a�L3 a �m69 O Q d C t o - Co u 0 oar Z0 m o m C m N m�„0 E o0a CD 0a� a ap,,m0CP O .. r, a G ° O c O 3: O T (D�O cn a a m S m E 0 nQam`mm m > a m o m U° U E m & c � o E a m CL m� m H 0 N C m U- O U U 0 C_� Q c Ub h 10 c L (D 0 m � = E oar oop° m� � o c� 3 m msaW)`" Eo^U 5 a10 0 0 0 3 o`v�u 0 0 j C m -W CIO 0 m �p Q a M m Om�ppmcl �°m�_8a m ,wn j ds @ o N � LU U. 0 � —0 Q n ps O Jw M r M e d c Z) 0 a - (D c m arc U m`CL 'a a o m m U y, o a� m0 x ° E y O �> m f =s O m 4 � m � a o a m� mem r— U m X02 O E 2 a� a �2 m Q �j'sau G N 0 �o 0 U � 09 r U. a uI Table 4 Comparlson of General Plan Atternattves by Land Use Acreage Lend lyses Single Family Multi -Family Total Residential Commercial Comm -10 fice/Indust. Parks/Open Space Total Non -Residential Vacant Land TOTAL4 "frog ; Developed 4.512.3 440.1 4,952.4 181.8 403.9 444.2 1.866.9 6,319.3 Exlsting Total 4.512.3 440.1 4.952.4 181.8 403.9 464.2 1,866.9 2.763.7 9,383.0 Aftematfire 1 5.908.3 479.9 6.388.2 278.4 791.7 1,321.4 3,194.8 0 9,383.0 Af ormn ve 2 4,167.0 535.5 6.702.5 356.5 808.5 996.2 2,880.4 0 9,583.0 Alternattva 3 6,250.0 [ 423.0 ;I 6.6723.0 1 610.8 � 1.069.1 786.4 j 2.910.3 0 9.583.0 Table 8 00neP0dsart of General Plan Altematives by Percent of Land Atex Land Us** "'ssrue0.:.WIN .:=: awloped : 7otd r.._.-, `�llttsrnattv���1 � ' Altemortfvi 2'. Aitemattve 3 Single Family 66.2 47.1 61.7 64.4 65.2 Multi -Family 6.4 4.6 5.0 5.6 4.4 esidential 72.6 51.7 66.7 69.9 69.6 ercial 2.7 1.9 2.9 3.7 6.4 ./Otfice/fndust. 5.9 4.2 8.3 8.4 11.2 pen Space LVacant 6.8 4.8 13.8 10.4 8.2 an-ResideMtol 27.4 19.5 33.3 30.1 30.4 Land 0 28.8 0 0 0 . 100.0 00.0 100.0 100.0 100.0 3 Developed equals total minus vacant land. 4 Total equals resldenttol plus nongeWdentlaL CITY OF DIAMOND SAN 01*12AL PLAN -- LAND USE ALTRINATIVIS RIFORT Table 7 Comparison of Land Use Designations - L.A. County vs. Proposed County County Denstty Proposed General Plan Land Use Proposed Existing Land Uses Designation (units/acre) De:ignattons7 Denstty (units/acre) Rural Reside nlial N 0.0- 1.0 Hillside Residential (RFS 0.4 I0,4 (Non -Urban) DU/2.5 ac) Rural Residential U1 1.1 -3.0 Rural Residential (RR) 1.0 (Urban) Single Fatuity U2 3.1 -6.0 Low Density Residential (RL) 3.0 Multiple Family U3 6.1 -12.0 low -Medium Resideniial (RLM) 6.0 Multiple Family U4 12.1 -22.a Medium-Hlg Residential (RMl-Q 12.0 Multiple Family Lis 22.0-35.0 (None) Retail Commercial Hotel C General Commercial (C) Mixed Commercial None None (None) Commercial Office (CO) Office Professional i Office Pfofess)onol (OP) (Industrial) Industrial Church I None Business Park (BP) None (incl, in overall uses) (None) Water Facility Public Facilities (PF) Fire Station Water (M School Fire (F) Schools (S) Park Park (Pig Recreation Recreation (REC) Open Space Open Space/Slopes (Os) Vacant Land (None) 7 See Figures 1 - 3 for alternctive land use plans, CITY Of DIAMOND BAs OENfRAL PLAN LAND USE ALTERNAtIVIS RLPORT L Sy 1` 5j) 1 / ' ��� , �f� ! -tib�J''•!.•- ; �. Nix ��/ y,��-,,ori..'--' ,� � ti�..•i�,� `;,,,�1:'�t ' f";_;, .t . , :_/ ,i� � ��°{.�✓.f��''',Lr•':��'�— ter_.; --.ter �`�: �. RT IiiaVP •.,, :+ ; i,_ .,•, ; �::� `� r.. j �yyGci/ � ` li�+,l 3 � _ � ti.1� r•� � �. t�t till•` '• "� f,Lir�.. :. z� •f RL K e �� • wr 1 l • Co 7r' • ! VV • t"� 'E }•ter. ` � w1� we �k� %• ..f•,�`IJ VIRE •��� �� � •/ » A I 10011"T A LEGEND MAXIMUM �4 1111.1.310E RLSIDEKrkL 1 DU4J AC= 1'VOM TACILR1p �f RURAL RESWINnAL i DWACQ WAV92 1 I L0W0f.W4irTRT310I1M1AL3 DWAC nRo n•� LOWMEDIVU R113100MAL61CH[YAC SCINDOL IM RESIUENnA 31 faIYAC•Q LARK SYN E.IEDEL'�I•i11 R[SiUENT1AL 14 OWAC NOGIISCRIUM FARK QGENERAL COEMARRCLIL !Ec 111ECREATION CO COMMOIC1AL 1 O"Wa � . OEr41 !1'ACNLOI'EO MOMSIMAL oeTCt! Q Ir i11SlNES! E'ARK 1 — 11, VACANT TARC71f A PROPOSED GPAC LAND USE MAP srt GENERAL PLAN i ANNING NCrVJWK i p"fS wiw M,sti1 •ff W 1•� . ALTERNATIVE 3 LEGEND DWS LAND USE MAP T. 111LLSIC! AlStOWnAt i OtYU AC�ti L�1 MIUC rACMMU «, �f RURAL RC WOMAL 1 OWAC� wATU towDuarrvat3 umAu OWACQ nas tow.,AtO1uw Rtsrows:AL&otrACr-, -R somm .. .,• •r !w RESID `iMiA rrr 11 oWAc rAuc GENERAL PLAN CHIMF.Dt Rfltn M-11lAL1[a1 w:RAL C0M!l1CIAL f1 r� oWAC� • HQW1wu1060 rAR# NM i't�TYVaM =GENtRM neLI � RlCRu4TON CD COPAMUGAOff E � OrW IrACI1lL8r� >� w mms"Now wr F/ N `f [ �' rRORS31pMAL ORICY I" MAW= vewnarwom j 8o, IU39NM PARKtTSq_- APPENDIX C - AIR QUALITY Vicinity Map Los Angeles County NFIEndo Engineering Scale: 1" CARB Air Quality Data for POrnona-State Stindzrds ! P01iui1iE Carbon Monoxide 1 -hour 111;lxi1.,Um s ppn» Days exceed. 3 -hour 1>9.0 ppnil Days exceed( -hour (>20 pprn) ! 19;59 1990 tax Excec lei 13 12 ] 3 0 0 1' � 0 0 0 ll 0 0 0 f Oxidant (07one) 1 -hour maximum (ppm) Days exceed l -hour (>.09 ppm) 0.29 145 0.25 117 0.24 104 0.29 -�3 Nitrogen Dioxide 1 -hour maximum (ppm) Days exceedl-hour (>0.25 ppm) 0.2 0 0.26 1 0.21 0 0?6 _ - 0 Sulfur Dioxide 1 -hour maximum .(ppm) Days exceed 24-hour (>.05 ppm) Days exceed( -hour (_> 25 ppm) N/M N/M N/M N/M N/M N/M N/M N/Mr N/M N/M _ IrM 11/111 Particulates (PATIO) 24-hour maximum (ug/m3) Days exceed 24-hour (>50 ug/m3) N/M N/M N/M N/M N/M N/M N/1%1 _ - v�� Lead 1 -month maximum (ug/m3) Months exceed 1 -month (?1.5 ug/m3) N/M N/M N/M N/M N/M _ N/M N/111 NTR iulfate 24-hour maximum (ug/m3) Days exceed 24-hour (2.25 ug/m3) N/M N/M N/M NIM NIM N/M N/Al _ `req i. NA=Not Applicable; NM=\rot Monitored; NE=No Exceedance Shading=Less than 12 full months of data. Monitoring discontinued. { § } k - j - ƒ \ � � �� ■ � - - el- § �.� \ � F9 lete . § _ I k LU ] ƒ2 4n ƒ _ & .F cfib § § I § 4p 4 at { § } k `L i + _ I f - I i {�{ b to h i N70 N 1 +n C N C,4z N M =» r"� N vii Z r^. Q �e�n a-�eo,�_�, Ir %a O 3* CQ eve:t��Z ago cve+t a°Oahv� O' ' C -N " n m Z aho e + ^ ao N z C34 0 `^I S rq C4 rq Ile ZQ < ev wz,v n Q ? c y ei O N N „- O O 00 %m N rn r 2 � N — � � 7 C6 A � f�.i � � � •H T fn a = C�uCzzv�F U Z X4 -- _ •- %► 4 V1 +i1 N Ncc N Y1 OC e•1 '�'\ 1 !'1 M Y.` +ry y fn 0c h Q H r+1 G [� h 4� N 1 .�.. fn+ .�'T N ~ kn V1 w 7p P7 y O C v1 :T O L 'n E- mZ Z c + (" a.7 Z E3 f3; G. Z Z C7 Z C7 F- a C-4 �i ko - � - _ f 3 - '� q 2 tn 7 3 _ R � 4-4 k n _ 2 Q ' 3 -t C) 7 f 2\ k 7 7 k 17 q -- . J 2 7 IV � • e ~ % $ ' 7 2 - � , / k k � 06 2 ad � � \ @ & ] $ � 3 , 3 3 d S%&\ k g p %& U.% I 20 vi ® g e c � 2' k � � t - 2 = Is § ' - o � . ZZ r n n r I x r n Y n v'k _ 7C ^'1 �0 w'1 4A x v7 Y n r Q s G v'f Q M C H U c-+ C,4 en vi E _ U ,.. u 00.. z v v rn r• ❑ Q y LL y �. L fi. LL CM /❑� CV(14 ell m M [V Ci Cd Table 1991 AQ,%ID Control %Te jSures Udder Coll si(jeratioil for Adoption by Local GovernniciltsI ContrQl Meature Title Number Activities Datcz SCAG ;^.-NSt' rJV'i'^70 , LAND USE. AND ENERGY CGINSERVATIONi MEASURES la Person Work Trip Rcduction•local govt cmplo5•ccs FROG. NOx, CO) Ordinance Adoption 1994/1995 1 b tion -Motorized Transpomdon (ROG, NOx, CO) Ordinance Adoption 1994/1995 :a EmploNler Ridcsham and Transit Incentives (ROG. NOx, CO) Ordinance Adoption 1994/1995 -b Parking Management (ROG. NOx, CO) Ordinance Adoption 1995/1996 2d Merchant Transportation Incentives (ROG, Nox, CO) Ordinance Adoption 1995/1996 3e Auto Use Restrictions (ROG, \Ox, CO) Ordinance Adoption 1995/1996 2f HOV Facilities (ROG, NOx, CO) 2g Transit Improvements (ROG, NOx, CO) TBD THD 3a Truck Dispatching, Rescheduling & Rerouting (ROG, NOx, CO) Ordinance Adoption 1992/1994 4 Traffic Flow Improvements (ROG, NOx, CO) Implement ATSAC3 1991/1991 5 -Nonrecnrrent Congestion (ROG,►\Ox,CO) Ordinance Adoption I99 t/1994 3 Airport Ground Access (ROG, NOx, CO) Help Prepare Plan 1992/1994 12a Paved Roads (Ph'110}-Clean Streets Program Ordinance adoption 1991/1994 12b Unpaved Roads and Parking Lots (Philo) Ordinance Adoption 7/I/94 16 High Speed Rail (ROG, NOx) Initiate Study 7/1/91/1997 17 Growth Management (ROG, NOx. CO) Ordinmm Adoption 1992/1994 SCAQI?D STATIONARY SOURCE CONTROL MEASURES -AREA SOURCES A -D-2 Control of Emissions from Swimming Pool Heating (NOx) Local Building Code 1991 I - Source: Proposed Corrections to the 1991 Draft final AQA4D. 7/8/91. 2. Note: Year/Year format is Proposed Adoption Dau/Pro ser 3- Note: ATSAC is Auto mated Traffic Surveillance and Control.plctnentatian Date. Table (cont.) Control MeaStlres Implemented by Local Goveninielitsl Control Measure Tine `amber Activities Date= E -D -la Residential Sector-Electncity Savings (NOx) Ordinance Adoption 1993 E -D -lb Residential Scctor-[Natural Gas Savings (Ail Pollutants) Ordinance Adoption 1993/'_'005 R -C -la Commercial Sector -Electricity Savings (NOx) Ordinance Adopuon 1993/2003 E -C-1 b Commercial Sector -,Natural Gas Savings (All Pollutants) Ordinance Adoption 1991/2009 E -C- a Industrial Sector -Electricity Savings (INOx) Ordinance Adopuon 199.112003 E -C -2b Industrial Sector -Natural Gas Savings (Alt Pollutants) Ordinance Adoption 1995/2009 E -C -2c Industrial Sector -Waste Recycling (NOx) Ordinance Adoption I991/I998 E -C-3 Local Government Conservation ProgrttTts (All Pollutants) Otd4w= Adoption 1995/2010 i- aource: rroposed Corrections to the 1991 Draft final AQi4D. 7/8/91. 2. Note: Year/Year format is Proposed Adoption DateJProposed Implementation Date. 3. Note: ATSAC is Auto mated Traffic Surveiilance and Control. Table 1991 AQNIP Control 1le.tsLlt'es L'ndei— Cun,"1LiVr;tt'W11 for AdJol)tlt7tl by Local Gi )) ti-1111:ClitsI Control Measure Ti4� Number ❑ate - A -D-3 Contrc! of Emissions from Rcsidcntial Local :3u;l.:in5 Cjj, 19} Ni -H -S &' Commcrcia! Watltcr HCating (,NOx) Monitoring 1992 A -E-3 Control of Dust Emissions -Agricultural Tilling (PS110) Ordinance Adoption 1994 A•F-2 Control of Emissions from Construction & Demolition Ongoing Cooper:uiolt 1992 M -I-7 Activities & On -Site Vehicular Flow (PM10) Ordinance Adoption 1994 A -F—: Low Emission Methods & Matcrials for Building Construction (ROG, P't11o) Ongoing Cuoper:ttron 1991 A..F-5 Control of Dust Emissions from Wind Erosion Ongoing Cooperation 1991 SCAQ,NID MOBILE SOURCE CONTROL NIEASURES :N -1-G-6 Eliminate Excessive Car Dealership Cold Stara Civil Enforrcmerit 1994 (ROG. NOx, CO) .1-G-7 Eliminate Excessive Curb Idling (ROG, CO) Civil Enforcement 1994 M-0.9 Eliminate Emissions from Advertising Vehicles Civil Enforcement 1994 (All Pollutants) M -H-1 Environmental Review Program (ROG, \Ox, CO) Monitoring 4i91 .%I.H-3 Supplemental Development Standards Ordinance Adoption 9/92 (All Pollutants) N1 -H-4 \bn-Work T ' R t. source: Proposed Corrections to the 1991 Draft Final AQN , 713/91. 2. Year/Year format is Proposed Adoption Date/Proposcd Implementation Date. 3. ATSAC is Automated Traffic Surveillance and Control. 0 np eduction (ROG, Nox, CO) Ordinance Adoption. 1994-'95 Ni -H -S Enhanced Regulation XV (ROG, NOx, CO) Monitoring 1992 .M -H-6 Truck Programs Administer Program 11191 M -H-7 Registration Program Effectiveness Assessment 10191 M -I-7 Eliminate Led Blowers (All Pollutants) Ordinance Adoption 1994 SLAG & SCAQN1D ENERGY CONSERVATION MEASURES D-2 Out -of -Basin Transportation of Biodegradable Ordinance adoption 1992 Solid Waste (All Pollutants) t. source: Proposed Corrections to the 1991 Draft Final AQN , 713/91. 2. Year/Year format is Proposed Adoption Date/Proposcd Implementation Date. 3. ATSAC is Automated Traffic Surveillance and Control. 0 APPENDIX D - NOISE rhe typical community nose environment is ccrnprtsed.cf a background noise level c, -.d ~;Tyrer rake levels, frequently transportation oriented. Since the background level is lower ,� cr=!e-ns ;posed try ` -,ner rc:se !evets f•^,� eat nEght.., .e ^^;v;Cuul sc;:;ces cre more pronounced cu:,ry ';me hours. a period wnen most ❑eoole demand quiet.^• Community noise is not a steadY state and varies with time. To quantify noise exposure over a long oerioa of time. there are two rating scales most commonly used. There are community, noise equ,vaient level (CNEL) and day/night average level (Ldn). CNEL means the average equivalent a-weignted sound level during a 24-hour day, obtotned after addition of five decibels to sound :eveis in the evening from 7:00 pm to 10.00 pm and after addition at 10 decibels to sound levels , the night before 7.00 am and offer 1 O.CO p„ s Lan means the average equivalent A-weight2a sound levet during a 24-hour day, obtained after addition of 10 decibels to sound levels In the might before 7:00 am and after 10.00 pm. A glossary of noise terms is provided in the Technical Appendix. .nfermittent or occasional noise such os those associated with stationary noise sources is not of sufficient volume to exceed community noise standards that are based on a time averaged scale such as the CNEL scale. To account for intermittent noise, another method to characterize noise is the Percent Noise Level (L°o), The Percent Noise Level is the level exceeded X% of the time during the measurement period. Percent Noise Levels is another method of characterizing ambient noise where, for example. L90 is the noise level exceeding 90 percent of the time, L50 is the level exceeding 50 percent of the lime, and L10 is the level exceeded 10 percent of the time. L90 represents the background or minimum noise level, L50 represents the average noise levet, and L10 the peak or intrusive. noise levels. The sound from an individual source decreases with increasing distance. The amount of sound reaching the receiver is affected by barriers between the source and receive (such as walls, landscaping, and buildings) atmospheric condition$such a the number of sources emitting sound ( s wind, temperature, and humidify), and C. LAND USE COMPATIBIL17Y GUIDELINES The purpose of this section is to present information regarding the compatibility of various land uses with environmental noise. It is from these guidelines and standards that the City of Diamond tsar Noise criteria and standards will be developed. Noise/land use guidelines have been produced by a number of Federal and State agencies including the Federal Highway Administration, the Environmental Protection Agency, the Department of Housing and urban Development, the American National Standards Institute and the State of California. These guidelines, presented in the following paragraphs, are all based upon cumulative noise criteria such as LE9. LDN or CNEL. The U.S ENVIRONMENTAL PROTECTION AGENCY (EPA) published in march 1974 a very important document entitled "Information on Levels of Environmental Noise Requisite to Protect Public Health and Welfare With and Adequate Margin of Safety: (EPA 55019-74-004). Table NA -1 presents a table of land uses and requisite noise levels. In this table, 55 LDN is described as the requisite level with an adequate margin of safety for areas with outdoor uses; this includes residences and recreational areas. The EPA 'levels document' does not constitute a standard, specification or regulation, but identifies safe levels of environmental noise exposure without consideration for economiq cost for achieving these levels. CITY OF DIAMOND 8AR NOISE APPENDIX li A, ^lit f cell �f Table D-1 Environmental Protection Agency Guidelines Indoor Outdoor Source: U.S. 'environmental Protection Agency Code: a. Since different Miles of activities aPpear to be assotfated with different levels. Identitltatlon of a maximum level for activity interference may be Bels ultas except in mase c,(Cumstcm s where speech communicalion is a critical activity. (See Figure 0-2 for Horse levels as a !unctions of distonce which altaw satisfactory communication.) b. Based on lowest IeveL c. Based only on hearing loss, d. An Lep (9) of 75 d9 rr4y be identified in these srtuatioru so long as the exposure over the remaining 16 hours per day is low enougn to resat( in a negligible contribution to rhe 24-hour average, i.e., no greater than an Leq of 60 d9 - Note: E€aploriCtfton of identified live! for hearing loss. The exposure period which result in hearing loss at the identified level is a period of AO years e Refers to energy rather than arfftuT* t averoges. CITY OF DIAMOND BAR NOISE APPENDIX July 2A 1001 Activity Henri nC To Protect Hearing To Prc Agar; Measures lnhrlerenee Loss Consideraryon Against Both Activity loss Effects (b) Interference Constderatiort fttecry =eslcent-e€ with Oic;S€ce Space and ldn - 45 «s. a-caS 45 55 =esfcent c€ wuh too puts€ae Space Ldn 45 v Leq 1241 70 45 nerc.o€ Leq (24) (a) 10 70 (c) (a) -side T,ansponat€on :eq (24)V (a) 70 Ip " (a) ncusrr€a€ 'eq (24)(d) (a) 70 70 (c) lal ,aspI€als Lan 45 70 70 is Leq (24) 7p 45 55 �a 7p cCuca;tanaf Leq (74) 45 Leq (241(d) Ip 45 55 55 10 ?e[reat€onat Areas Leq (24) (a) 70 10 c0 ( lal 10 70 (c .,arm land cnd General Leq (24) Uniloculated Land (a) 70 70 (c Source: U.S. 'environmental Protection Agency Code: a. Since different Miles of activities aPpear to be assotfated with different levels. Identitltatlon of a maximum level for activity interference may be Bels ultas except in mase c,(Cumstcm s where speech communicalion is a critical activity. (See Figure 0-2 for Horse levels as a !unctions of distonce which altaw satisfactory communication.) b. Based on lowest IeveL c. Based only on hearing loss, d. An Lep (9) of 75 d9 rr4y be identified in these srtuatioru so long as the exposure over the remaining 16 hours per day is low enougn to resat( in a negligible contribution to rhe 24-hour average, i.e., no greater than an Leq of 60 d9 - Note: E€aploriCtfton of identified live! for hearing loss. The exposure period which result in hearing loss at the identified level is a period of AO years e Refers to energy rather than arfftuT* t averoges. CITY OF DIAMOND BAR NOISE APPENDIX July 2A 1001 "� • 0 California Land Use Campatibilit y Studies LJwa Y44 CAI*a04Y **fAu mmm ws1C H�4y�1pM +►VOf=1rWW00N jff tjAW COMMMMAL OPIPM �K rMOwn� r��wKausr� WA�jIQb�y� �Mif �M 6w CMS* Olf1000� iR'4TAT0� JIOA ft" AdMOUL=in COMY�11fty Kptat ��.rva: jrt �w� ;cHey 60r� E I !{ M LEGEND No Somm r'"s NyuhmoMI mawpea MRrAt� WAIWW 10 nrnwt 6&V, nftfty a+r+�IwnMaw. IWOMIAW ACCVgAa j •t�r+r'+e w -w a muftumm, -m aloud i � Y y"Wm or ar ererrMMelr�, HO�YALEY IIHACCl/1Arj . fww N WW! MOON •n A%Pft 1 t��� �MR1t11M1 dwlR CUMT YNACCMA&A "w" *OFrW-**M 1MIAO be pommMaA. iO1i11C� ITM 0' CALN'C MIA A�f0#Y COMMIS810M HANNOCk �oow�o aa,�w.►lty �w�. CITY OF DIAMC-40 OAR Noise Appiiaix Ypical Ncise Levels of Familiar Sources c3A physically Pa�ntut 140 Sonic 800M Extremely Lcud 135 130 Discomforting 125 Jet Takeoft at 200, 120 Oxygen Torch 115 Discotheque 110 Motorcycle at 15'(Unmuffied) 105 Power Mower at 3- Very Loud 100 Newspaper Press 95 Freight Train at 50' 90 Food Blender 85 Electric Mixer, Alarm Clock 80 Heavy Truck at 5()- 75 Busy Street Traffic at 50- Loud 70 Averagq Traffic at 100'. Vacuum Cleaner at 10, 65 ... Electric Typewriter at 10- 60 Dishwasher at 10', Air Conditioning Unit at 15- 55 .w: u, Normal Conversation at 51 50 Typical Daytirfte Suburban Background 45 nn,. Refrigerator Refrigerator at 10, 40 Bird Calls 35� Library zu Motion Picture Studio 77. 15 10 Leaves Rustling Threshold of Hearing n Source: Oransa Courcy EMA rcprescnung 31 artcrial intcrsections throughout the County and assurmcd to be typical of southern Califomia artcrials. II. Roast Grade Assumptions -- ICVCl terrain and roadway. III. RD -77-108 Ierprrt Parameters -- see the table on the following pages. IV. RD -77-108 hrput Parameters Dej7nitions-: ADT means average daily r%vo-way traffic volume provided by DKS Associates. . CNEL is provided at 150 feet from the frewway centerlines and 100 feet from all other roadway centerlines. Dis CL means distance to centerline for CIVEL calculation Spd means the posted speed limits were taken from "Draft Circulation Element for the City of Diamond Bar" prepared by DKS Associates, June 199I. 111W is the effective half -width of the roadway (the distance from centerline to the center of outermost travel lane); taken from "Draft Circulation EIement for the City of Diamond Bar" prepared by DKS Associates, June 1991. % Tr is the percentage of trucks on the roadway. Truck mix along the freeways was taken from "19$9 Annual Average Daily Truck Traffic on the Califomia State Highway System". The rest of the roadway link truck mix was provided by ? % Med is the percentage of medium trucks. RD -77-108 Noise Asstlmptioils 1. Temporal Traffic Dislriblrtiulr :issitllled (I crcent) Type of Vehicle pay i✓venin(T Ni�itt :automobile '-t.•t 1 - 1 ?.33 � 9._1 Medium Truck 1.56 0.09 0.19 Heavy Truck 0.64 0.0? 0.08 Source: Oransa Courcy EMA rcprescnung 31 artcrial intcrsections throughout the County and assurmcd to be typical of southern Califomia artcrials. II. Roast Grade Assumptions -- ICVCl terrain and roadway. III. RD -77-108 Ierprrt Parameters -- see the table on the following pages. IV. RD -77-108 hrput Parameters Dej7nitions-: ADT means average daily r%vo-way traffic volume provided by DKS Associates. . CNEL is provided at 150 feet from the frewway centerlines and 100 feet from all other roadway centerlines. Dis CL means distance to centerline for CIVEL calculation Spd means the posted speed limits were taken from "Draft Circulation Element for the City of Diamond Bar" prepared by DKS Associates, June 199I. 111W is the effective half -width of the roadway (the distance from centerline to the center of outermost travel lane); taken from "Draft Circulation EIement for the City of Diamond Bar" prepared by DKS Associates, June 1991. % Tr is the percentage of trucks on the roadway. Truck mix along the freeways was taken from "19$9 Annual Average Daily Truck Traffic on the Califomia State Highway System". The rest of the roadway link truck mix was provided by ? % Med is the percentage of medium trucks. Diamond Sar Existing :Noise FHWA Analysis 1AJ li' 45 street ADT D C\IiL 1 it I 75 F 1 (y 1 li I �5 1 ['.,thlinder Its+ud I 70 65 1 60 1 flis CL, Spd f 1/2WI `.'c 'I'r,0 %I( ' 4b '.Vest of Peaceful H"Is Road -.?1'01 57 51 25 1 =4 47 W'cstofOranec Frerwav (SB) "1 h3 3) 3 "0 € 00 00 -5 =: :.5 yy 0 ! 4`I raSt of Oranee Freewav i(SR) i _0.3001 6 -[.al 30 83 I I S € I 100 -5 1 24 € 1.5 Y) 0 1 49 : - wcst of Diamond Bar Boulcvard 13.0001 67.31 ,S 1 a7 ! ! 187 I 100 t5 34 I I.5 199.0 :i) Brea Canvon ltoad 1 - 38 1 68 1 140 1 100 -15 `! South of Sllvcr Ru€Ict Drive I �,000f 61.31 2 � �� I € =' North of Diamond Bar Bouievard -1,4001 5 R.8 I 2" 0 - 1 59 i 121 l i 00 �D 1 13 1 I I.5 + t}9 D 43 So.,;- of P.at rdcr Road 7,600f 59.9 36 25 32 1 -12 84 ! 00 0 [ 8 1.5 ' 99.0 a-1 South of Pathfinder Road 1 10.1001 61.2 27 , 50 99 100 4$ 2.1 I 1.5 J9.0 South of Colima Road 15,5001 63.0 39 35 59 1 19 100 45 3d 1 1.5 o.0 6 I - \'onh of Colima Road '8,300 66.9 37 a l fi5 75 156 100 1 45 24 1.5 1 99.0 S7 1 • North of Pomona Frce�tav , 3" 700 67.5 39 70 132 28I 100 45 24 3.0 171.3 }i € - North of Washington Street 30.500! 6fi.6 3b E44 30$ 100 45 33 3.0 f 71.3 59 Brea Canyon Cut-OITRoad 62 12fi ? fib 104 S0 -'4 3.0 1 71.3 60 ' -South of Pathfinder Raad 10,500 59.8 11 ZZ 45 47 61 Lemon Avenue 100 I 40 fi 1.5 f 99.0 62 - North of Colima Road 53 Walnut Drive 12.100 63.2 30 42 78 !60 100 I 45 25 3.0 ;1.3 S4 1 - West of Lemon Avenue 5.200 56.8 14 22 33 S7 Chino Hills Parkwa 63 100 35 f 8 3.4 11.3 i5 i - North of Chino Avenue i7 Chino Avenue 81100 60,2 27 33 53 103 100 45 25 1S 99.0 $ € - East of Chino Hllls Parkway 4.500 57.5 9 16 32 68 104 I 45 b 1.5 99.0 Date 7%30/91 :Time 3:13 PM Diamond BaT Alt 2 Noise FHWA Analysis Al 8 I I -I4 I Street 1 I I ADT I D C1F.L I 75 F 1 '0 f GH ' L 1i 43 iPathf rider Road b5 f 60 1 Dls CLI 5 d f 1/2M % TrF,o 46 1 • - 'Xcst or' Pcaccful H. -i's Roads b._441 59.31 9 5 ;o r I ' .Nit i. I .4'cst ofOranuc Frccwav tSBI 1.2,00(8 64.61 31 :7 o0 I too i5 1 _-4 I 1.5 1 9 0 1 48 1 East of Orange Frccwav Is B) I 30.4001 1 -9 r < 14 < , 1 8 1 1(K) s5 I '4 ; 1.5 1 17,9.0 49 i West of Diamond Bar Boulcvard1 19,6001 64.1 30 1 ,6 S!) Urea Canon Road 1 t 88 1 184 1 100 a5i.5 19,0 1 -South of Silver Bullct D we 1 12, 4401 63.11 24 t 1 39 I 1 I i r 2 i S orth of Diamond Bar Boulevard 6.604 64.5 2i 1 76 1 159 1 100 j 50 1 18 1.5 1-990 �3 ' • Sau:.h of Pat."u r:d�r Road � 1 t ,400 61.7 j 27 29 I 36 I 52 1 ' log 100 i 50 18 I I.5 1 99.0 5 l I - South of Fatltt7ndcr Road 15.244 63.0 29 63 ( 128 100 45 I ,- 1 l.5 1 99.4 33 f - South at �allrrta Raad ?3,3D4 64,8 31 41 1 'S X56 [04 ; -t5 '_4 1 1.5 i 99.0 a6 1 -North of Colima Road 41,700 68.5 43 97 1 204 100 j 45 `4 1 199.0 S7 1 NorLht of Pomona Freewa 48,204 69.2 47 81 68 3 9 100 1 45 =. n 3.4 71.3 =5 - �'ot-th of 1Yashin ton Street 30,300 68.3 42 89 187 399 100 1 45 24 3.0 1 71.3 59 Brea Canyon Cut-OIT Road 79 163 348 100 1 50 24 3.0 1 71.3 60 : - South of Pathf nder Road1 15.504 61.5 14 I -'8 59 126 E40 61 Lemon Avenue 1 a0 6 1.5 99.0 62 - Nonh of Colima Road 1 63 Wainut lirive 18.200 65.0 33 51 I E00 214 E40 E -5 ,- 64 ; - West of Lemon Avenue1 7.800 58 5 20 25 40 55 Chino Hills Parlt�va 8Q 100 1 35 18 3.0 71.3 56 1 - North of Chino Avon— i7 Chino Avenue 34,700 66.637 63 126 268 too 1 45 25 I 5 99.4 i8 i - l=ast ofChino Hllls Farkwa 17.444 53.3 1 18 36 77 166 100 45 6 1.5 99.0 Date 7/30/91 : gnu 3;04 PM Diamond Bar Alt 3 Noise FHWA Analysis .i4 ' Street 45 Pathfinder Raad - ADr •, r C\EL i .5 r I 70 c; 1 GS H f 60 1 J I Dis CLI Spd 1; L I i 1 1/21V I % Tr!<% 11 46 ,,vest of Peaceful hills Road 7.3001 59.81 26 1 31 ' *ti'ast of Orange Freeway (SB) 24.6001 65.01 32 1 51 i 50 1 97 1 100 45 1 24 I 1.5 990 4Fa2 of Orange c Fracwav (SB) 34,1001 66.51 36 I 62 100 I 11 1 100 y5 -' I 1.5 + 99.0 of Diamond Bar Bouicv.31 s9 1 E 25 264 f I00 45 1 24 f t.S i .99.0 V?7 non Road I 94 1 198 1 l00 s5 I ;4t.5 :94.0 t of Silver Hu11e1 D 17.:001 1 ; I of Diamond Bar Boulevard 61.0) 21 1 1 172 100 I I 18 ! ,.5 I 150 99A of Pathfinder Road , , 1 _,9001 62.21 28 1 3 i I 56 1 110 100 1 50 18 1.S 199.0 54 ! - South of Pathfinder Road r 17,100 63.5 29 1 38 68 138 100 I 4 55 ! South of Colima Raad ! '6,200 65.3 32 43 .4 1 1.5 97.Q 56 - Nor[h of Colima Road 1 46.800 69.0 45 53 87 104 220 100 I 45 1 71.0 57 - North of Pomona Freeway 54.000 69.7 49 181 387 100 1 45 24 3.0 5$ - Forth of Washin tan Street 34.000 68.8 45 96 201 431 100 1 45 24 3.0 71.3 59 urea Canyon Cut-OtTRoad 1 1 84 176 376 100 t 50 24 3.0 71.3 60 1 - South of Pathfinder Road 1 17,800 62.1 15 30 61 Leman Avenue 64 138 100 1 40 6 1.5 99,0 Z ! - NoNt of Colima Road 1 63 Walnut Drive f 20,400 65.4 33 54 106 223 100 1 45 25 3.0 71.3 64 - West of Leman Avenue 8,800 59,0 20 26 65 Chino Hills Park{vay 43 86 100 35 18 3.0 71.3 66 -North of Chino Avenue 1 67 Chino Avenue 38,500 67.0 38 d6 134 285 100 45 25 i.5 94.0 6$ 1 . Fast of Chino Hills Parkwa 19,100 63.8 ]9 39' 83 179 I 100 i 45 6 1 i.5 99.0 Date 7/30/91: Mme 3:08 PM