HomeMy WebLinkAboutRES 2003-53RESOLUTION NO. 2003- 53 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF I[ APPROVING A MITIGATED NEGATIVE DECLARATION ANI MONITORING PROGRAM (ND 2003-04) FOR THE SUMMITRI PROJECT A. RECITALS. (i) The City of Diamond Bar proposes development of a 30,000 square foot Li of approximately 0.8 — acre within the northern portion of the existing 17.3 acre Su the northwest corner of Grand Avenue and Summitridge Drive (the "Project' herei IIAMON BAR ) MITIGATION Sections 21.000 et. seq. ("CEQA"), the State CEQA Guidelines, California Code of Reg )GE LIBRARY tie 14, upon a site comprised ridge Park located at r.) ing Plan (ii) In accordance with the provisions of the California Environmental Quality Act, Public Resc urces Code Sections 21.000 et. seq. ("CEQA"), the State CEQA Guidelines, California Code of Reg lations, T tie 14, Sections 15000 et. Seq., the City prepared an Initial Study and Mitigated Negative Declaration (N 2003- 04) (State Clearinghouse No. 2003081055) dated August 2003, (the "IS/MND") and Mitigation ("MMP") to analyze the proposed Project. Monitc ing Plan (iii) On August 8, 2003 in accordance with CEQA Guidelines Section 15072, 15073, 21091 a 21092 a Notice of Availability and Intent to Adopt a Mitigated Negative Declaration was publishe J within th D Inland Valley Daily Bulletin and the San Gabriel Valley Daily Tribune. In addition, on August 8 2003, copies. of the Notice were posted on-site and displayed off-site at seven public locations within the Ci of Diam nd Bar. Approximately 440 owners of property located within 1,000 feet of the Project were mail d a copy of the Notice. (iv) A public review period for the proposed IS/MND was provided from August 8,.2003 through September 9, 2003. Copies of the proposed IS/MND were made available for public review at theiamond ar Library and at City Hall. (v) In accordance with CEQA Guidelines, the IS/MND was circulated to interested p arlies and agencies for public comment. In response to the circulation of the IS/MND, the City received written ind oral comments regarding the adequacy of the IS/MND. The City caused preparation of written responses where iequired to all comments which raised project related environmental issues. The City has incorporatec the comments and responses into the MND where appropriate, (vi) On September 16, 2003 the City Council held a duly noticed public meeting ont e IS/MN At the meeting, interested parties were provided an opportunity to present oral and written corn eats relarding the IS/MND. On September 16, 2003, the City Council concluded the public meeting. B. RESOLUTION. NOW, THEREFORE, it is hereby found, determined and resolved by City of Diamond Bar, as follows: The City Council hereby specifically finds that all of the facts set forth in the Resolution are true and corr6ct. City Council of the Part A. of this 41 200B-53 2. The City Council finds and determines that the public and governmental agencies have been afforded ample notice and opportunity to comment on the IS/MND. 3. In accordance with CEQA, the City Council finds and determines that the IS/MND has been independently analyzed by the City and its staff, and that the IS/MND represents the independent judgment of the lead agency with respect to the Project. 4. The Project will not result in significant impacts to the environment; that said IS/MND and MMP are adequate to serve as the required environmental documentation for the Project based on the finding that the documents reflect the independent judgment of the lead agency; that it has considered the IS/MND and MMP together with any comments and responses received during the public review and meeting process; and further finding on the basis of said documents that there is no substantial evidence that, with the implementation of the mitigation measures identified in MMP, the Project will have a significant effect on the environment. 5. The City Council, after due inspection, investigation and study made by itself and in its behalf, and after due consideration of all evidence and reports offered at said meetings determined that the IS/MND and the MMP were prepared in compliance with the requirements of California Environmental Quality Act and State CEQA Guidelines. 6. The City Council approves and adopts the IS/MND and MMP for the proposed Project, attached hereto as Exhibit "A" and incorporated herein by reference as the environmental documentation for the Project. PASSED, APPROVED AND ADOPTED THIS 16th DAY OF SEPTEMBER, 2003. Carol Herrera Mayor I, Lynda Burgess, City Clerk of the City of Diamond, do hereby certify that the foregoing Resolution was passed, approved and adopted at a regular meeting of the City Council of the City of Diamond Bar held on 16th day of September, 2003. AYES: COUNCIL MEMBERS: Chang, O'Connor, zirbes, MPT/Huff, M/Herrera NOES: COUNCIL MEMBERS: None ABSENT: COUNCIL MEMBERS: None ABSTAIN: COUNCIL MEMBERS: None 5 Lynda: Surgasc,y -CityCleric INITIAL MITIGATED NEGATIVE DECLA SUMMIT RIDGE LIBRARY P City of 21825 E. Diamond E Mr_ .carr Deputy BonTerr 151 Kalmus Drive, Costa Mesa, Cali City of [ Mr. Thomas E. Smi INITIAL STUDY/ -- MITIGATED NEGATIVE DECLARATION SUMMIT RIDGE LIBRARY PROJECT ND 2003-04 Prepared for, City of Diamond Bar 21825 E. Copley Drive Diamond Bar, CA 91765 Contact: Mr. James DeStefano Deputy City Manager Prepared by. BonTerra Consulting 151 Kalmus Drive, Suite E-200 Costa Mesa, California 92626 and the City of Diamond Bar Contact: Mr. Thomas E. Smith, Jr_, AICP August 2003 SL mnlit Ridge Lbran TABLE OF CONTENTS Section 1 INTRODUCTION ......................................... P ---1-1 pa E- 1.1 Purpose of the Initial Study.............................................. 1-1 .............................. 1.2 Summary of Findings ................................................................. - 1.3 Project Approval Process................................................................................ 1-1 1.4 Organization of the Initial Study...................................................................... 1-2 2. PROJECT LOCATION AND ENVIRONMENTAL SETTING ...................................... 2-1 2.1 Project Location............................................................................•-•. 2-1 2.2 Environmental Setting.............................................•--•-................................... ............... -1 2.3 Project Objectives..........................................................•.............._.................. -2 3. PROJECT DESCRIPTION.......................................................................................... -1 3.1 Project Approvals Required............................................................................. -1 3.2 Project Characteristics ..................................................................................... 3.3 Project Phasing -1 ................................................................................................. -1 4. ENVIRONMENTAL CHECKLIST FORM ................................ .............. - 5. ENVIRONMENTAL EVALUATION .............................................. 6. REPORT PREPARERS AND CONTRIBUTORS ---.. 13-1 -1 7. REFERENCES ............................................ ......... - 1 LIST OF TABLES Table No. Page 1 Existing Intersection Capacity Utilization ................................................................... 5 18 2 Forecast Traffic Volumes—Proposed Library .............................................................. 5- 8 3 Summary of Intersection Capacity Utilization Impacts ................ 5. g Exhibit LIST OF EXHIBITS 1 Regional Location Map ............................................................. ............. 2-� 2 Local Vicinity Map • ...................................................... 3 Overall Site Plan ........................................ 1 4 Library Floor Plan ................................................ .................. 1 5 Building Elevations ....................................... .. .3 1 6 Site Photographs......................................................................................... ...........5 G C:SDocumenis and SettingSUmDeS%MY DocumentsUbreryNEg DEC.doc i Initial Study/Mitigated Summit Ridge Library TABLE OF CONTENTS Section Page 1. INTRODUCTION .......... ............................................................................ .................... 1-1 1.i Purpose of the Initial Study...............................................................................1-1 1.2 Summary of Findings...........................................................----.........................1-1 1.3 Project Approval Process...., .................................................................. I .......... rocess.................................................................................. ' 1.4 Organization of the Initial Study........................................................................1-2 2. PROJECT LOCATION AND ENVIRONMENTAL SETTING ........................................2-1 2.1 Project Location................................................................................................2-1 2.2 Environmental Setting......................................................................................2-1 2.3 Project Objectives.............................................................................................2-2 3. PROJECT DESCRIPTION .......................................................................................3-1 3.1 Project Approvals Required...............................................................3-1 3.2 Project Characteristics......................................................................................3-1 3.3 Project Phasing................................................................................................3-1 4. ENVIRONMENTAL CHECKLIST FORM................................................._4-1 5. ENVIRONMENTAL EVALUATION...........................................................5-1 6. REPORT PREPARERS AND CONTRIBUTORS.........................................................6-1 7. REFERENCES. ......................................................... I ................. ­­­"­­"­­­ ....... 7-1 LIST OF TABLES Table No. Page 1 Existing Intersection Capacity Utilization....................................................................5-18 2 Forecast Traffic Volumes --Proposed Library ...............................................................5-18 3 Summary of Intersection Capacity Utilization Impacts .......... ...................................... 5-18 LIST OF EXHIBITS Follows Page Exhibit 1 Regional Location Map................................................................................................2-2 2 Local Vicinity Map..............................................................2-2 3 Overall -Site Plan...............................................................3-1 4 Library Floor Plan.......................................................................................................3`1 5 Building Elevations.......................................................................................................5-2 6 Site Photographs......................................................................................................... C:�Dxumants ants servings—DeswY Documents4 ibraCYNEg DE"bC i initial Study/Mitigated Negative f3eclaration A 30 -day public review period has been established for the IS and proposed MN in accordance with Section 21091 and 21092 of the California Environmental Quali y Act (CE QA) and Section 15072 and 15073 of the State CEQA guidelines and Section 24038 ( )(2)(D) o the State of California Library Bond Act Regulations. In reviewing the IS and pr posed ND, persons and public agencies should focus on the proposed finding that the project will not I lave a significant effect on the environment. If reviewers believe that the project may have a significant effect, they should: (1) identify the specific effect; (2) explain why they believe the effect would occur; and (3) explain why they believe the effect would be significant. The environmental documentation is available for review at the following locations: Diamond Bar Public Library City of Diamond Bar -- City Hall 1061 South Grand Avenue 21825 East Copley Drive Diamond Bar, California 91765 Diamond Bar, California 91765 Comments on the analysis contained herein may be sent to the following: James DeStefano, Deputy City Manager City of Diamond Bar 21825 E. Copley Drive Diamond Bar, California 91765 Following receipt and evaluation of comments from agencies, organizations, and/or individuals, the City of Diamond Bar will determine whether any substantial new environmental issues have been raised_ If so, further documentation, such as an environmental impact report (EIR) or a revised IS may be required. If not, the project and environmental documentation are scheduled to be approved and adopted by the Diamond Bar City Council on September 16, 203. 1.4 ORGANIZATION OF THE INITIAL. STUDY The IS is organized into the following sections: X Section 1 — Introduction. This section provides an introduction describing the findings of the IS. X Section 2 — Project Location and Environmental Setting. This section provides a brief description of the project location, the existing environmental setting of the prof ct site and vicinity, project objective and project history. X Section 3 — Project Description. This section provides a detailed desc iption of I he physical and operational characteristics of the proposed project. X Section 4 Environmental Checklist Form. The completed CEQA cliecklist form provides an overview of the potential impacts that may or may not result from project implementation. The environmental checklist form also includes "mandatoiy findings of significance" required by CEQA. X Section 5 — Environmental Evaluation. This section contains an analysis of environmental impacts identified in the environmental checklist and identifies mitigati n measures that have been recommended to eliminate potential significant effects or reduce them to a level that is less than significant. C:M)o umems and 50mngs NmDeswly DocumenisUbraryNEg DEC.dcc 1-2 Initial StudylMitigated Negative Declaration Summit Ridge Library A 30 -day public review period has been established for the IS and proposed MND in accordance with Section 21091 and 21092 of the California Environmental Quality Act (CEQA) and Section 15072 and 15073 of the State CEQA guidelines and Section 24038 (a)(2)(D) of the State of California Library Bond Act Regulations. in reviewing the IS and proposed MND, persons and public agencies should focus on the proposed finding that the project will not have a significant effect on the environment. If reviewers believe that the project may have a significant effect, they should: (1) identify the specific effect; (2) explain why they believe the effect would occur; and (3) explain why they believe the effect would be significant. The bnvironmental documentation is available for review at the following locations: Diamond Bar Public Library . City of Diamond Bar — City Hall 1061 South Grand Avenue 21825 East Copley Drive Diamond Bar, California 91765 Diamond Bar, California 91765 Comments on the analysis contained herein may be sent to the following: James DeStefano, Deputy City Manager City of Diamond Bar 21825 E. Copley Drive Diamond Bar, California 91765 Following receipt and evaluation of comments from agencies, organizations, and/or individuals, the City of Diamond Bar will determine whether any substantial new environmental issues have been raised. If so, further documentation, such as an environmental impact report (EIR) or a revised IS may be required. If not, the project and environmental documentation are scheduled to be approved and adopted by the Diamond Bar City Council on September 16, 2003. 1.4 ORGANIZATION OF THE INITIAL STUDY The IS is organized into the following sections: X Section 1 — Introduction. This section provides an introduction and overview describing the findings of the IS. X Section 2 — Project Location and Environmental Setting. This section provides a brief description of the project location, the existing environmental setting of the project site and vicinity, project objective and project history. X Section 3 — Project Description. This section provides a detailed description of the physical and operational characteristics of the proposed project. X Section 4 — Environmental Checklist Form. The completed CEQA checklist form provides an overview of the potential impacts that may or may not result from project implementation. The environmental checklist form also includes "mandatory findings of significance" required by CEQA. X Section 5 — Environmental Evaluation. This section contains an analysis of environmental impacts identified in the environmental checklist and identifies mitigation measures that have been recommended to eliminate potential significant effects or reduce them to a level that is less than significant. C\Domrrems and SetdngSWimDeGWY 00CumentSUbraryN£g DEC.doc 1-2 Initial StudylMitigated Negative Declaration S imadt Ridge brary SECTION 2— PROJECT LOCATION AND ENVIRONMENTAL SETTING 2.1 PROJECT LOCATION acre Su mil The proposed project site consists of an approximate 0.8 -acre within the northerr portion of the existing 17.3 acre Summit Ridge Park on the northwest corner of Grand Avenu D and Sul nmit Ridge Drive in the eastern portion of the City of Diamond Bar, Los Angeles Cou ty, Calif nia. The regional location and local vicinity of the project site are depicted in Exh bits 1 an J 2, respectively. Vehicular access to the project site would be provided from a new ntrance u ider construction on Grand Avenue and a secondary access existing on Summit idge Driveas depicted in Exhibit 3. Regional access to the project site is provided by the S ate Rout 57 freeway (SR -57). The project site is bounded to the south by Grand Avenue and single -f mily estate homes, to the east by Summit Ridge Drive and single-family homes, to the north b the City Community and Senior Center (currently under construction) and on the wast by va nt land. mean 5ea 2.2 ENVIRONMENTAL SETTING The project site located upon an existing .08 acre portion of the existing 17.3 acre Su mil Ridge Park in the City of Diamond Bar. The upper portion of the park property is c irrently ur idel construction of the Community/Senior Center building with associated parking, op on space, anc landscaped areas. The existing open turf play areas and baseball diamond are b ing retail ed; however, public access is being restricted during the construction of the Com unity/S for Center. These facilities will become available to the public upon completion of the- Community/ Senior Center construction in March of 2004. The perimeter of the park is landscaped primarily with eucalyptus trees and is partially blocked from view by surrounding residences. The project site is designated in the City of Diamond Bar General Plan as a Park and its zo ied as a residential development zone. The proposed library project is permitted within the pal to of land uses permissible by the General Plan and zoning. The site slopes downhill from nort i to south. Elevations within the project site range from approximately 1,250 feet above mean 5ea level (msl) to 1,160 feet (msl). The following identifies the land uses surrounding # e project ite as well as the general plan land use designations of surrounding areas. Surrounding Land Uses: North: Community and Senior Center (under construction) and Vacant Land South: Rural Residential East: Park and Low Density Residential West: Vacant Land and Low Density Residential General Plan Designations for Surrounding Areas: North: Planning Area 2/Specific Plan Overlay South: Rural Residential (max. 1 dwelling unit (du)/acre) East: Low Density Residential (max. 3 du/acre) West: Planning Area 2/Specific Plan Overlay and Low Density Residential (max. Zoning Designations of Surrounding Areas: North: Residential Planned Development Zone (RPD) 1 dull 0,000 fe South: Single Family Residential R-1) 1 du/40,000 square feet (fe) East: Residential Planned Development Zone (RPD) 1 du/10,000 ft2 West: Single Family Residential R-1) 1 du/8,000 €e GADwuments and SettingsumDes\my WcumentsULbraryNEg DEC-doc 2-1 Initial Siudy/Mitigated Summit Ridge Library SECTION 2 — PROJECT LOCATION AND ENVIRONMENTAL SETTING 2.1 PROJECT LOCATION The proposed project site consists of an approximate 0.8 -acre within the northern portion of the existing 17.3 acre Summit Ridge Park on the northwest comer of Grand Avenue and Summit Ridge Drive in the eastern portion of the City of Diamond Bar, Los Angeles County, California. The regional location and local vicinity of the project site are depicted in Exhibits 1 and 2, respectively. Vehicular access to the project site would be provided from a new entrance under construction on Grand Avenue and a secondary access existing on Summit Ridge Drive as depicted in Exhibit 3. Regional access to the project site is provided by the State Route 57 freeway (SR -57). The project site is bounded to the south by Grand Avenue and single-family estate homes, to the east by Summit Ridge Drive and single-family homes, to the north by the City Community and Senior Center (currently under construction) and on the west by vacant land. 2.2 ENVIRONMENTAL SETTING The project site located upon an existing .08 acre portion of the existing 17.3 -acre Summit Ridge Park in the City of Diamond Bar. The upper portion of the park property is currently under construction of the Community/Senior Center building with associated parking, open space, and landscaped areas. The existing open turf play areas and baseball diamond are being retained; however, public access is being restricted during the construction of the Community/Senior Center. These facilities will become available to the public upon completion of the Community/ Senior Center construction in March of 2004. The perimeter of the park is landscaped primarily with eucalyptus trees and is partially blocked from view by surrounding residences. The project site is designated in the City of Diamond Bar General Plan as a Park and is zoned as a residential development zone. The proposed library project is permitted within the palette of land uses permissible by the General Plan and zoning. The site slopes downhill from north to south. Elevations within the project site range from approximately 1,250 feet above mean sea level (msl) to 1,160 feet (ms]). The following identifies the land uses surrounding the project site as well as the general plan land use designations of surrounding areas. Surrounding Land Uses: North: Community and Senior Center (under construction) and Vacant Land South: Rural Residential East: Park and Low Density Residential West: Vacant Land and Low Density Residential General Plan Designations for Surrounding Areas: North: Planning Area 2/Specific Plan Overlay South: Rural Residential (max. 1 dwelling unit (du)/acre) East: Low Density Residential (max. 3 du/acre) West: Planning Area 2/Specific Plan Overlay and Low Density Residential (max. 3 du/acre) Zoning Designations of Surrounding Areas: North: Residential Planned Development Zone (RPD) 1 du/10,000 ft' South: Single Family Residential R-1) 1 du/40,000 square feet (fe) East: Residential Planned Development Zone (RPD) 1 dull 0,000 ft2 West: Single Family Residential R-1) 1 du/8,000 ft2 c:r k—xents and SettingsUmDeSWY DocumentsWbraryNEg DEC.doc 2-1 initial study/Mitigated Negative Declaration --- a � � cdw ards Al, :prce hese K e ' n ..r 7- S Ano J P- _ S 1 V t a0. n el Ferest t,` Anpeies I Nasion;I Foreir � � � 1 t s � a.at I I Y I t Angeles N.tlpn el Forst � .Allo l � I ID 17project Los ? Location s- Eargonlo ` Angeles 4der.­ Area s.ni. I v 2 � - - _ CI.Y.4.0 N.tlnn.l 2 f-. t - 4.444 J b 3 N—Z Ca,4lna '{ xMMZ—Cam �'� i, � den dletert 'i xr^�u8-z�'.eY.��_:.._. ck°^'ky���.F• Y -; �^�1�� :. PS,. � L .k+5.: 'S Y• �'.� iyi 5��+�£�� f � TY .rt l` Regiona€ Location Exhibit 1 Summit Ridge Library Project 10 Q 10 26 Miles4— 0 N 5 1 ( I i N G R:/PAS/Projec1slD8 rlj0101Fx I.RL_ 110402.pdf 1 1 � 1 j Kern n Cin -1 Lns Rad re3 Na[IQ nal inre3S San Cbrgnnln Wt Id amass Me■ Edwards Air cerce Base 1 Ker€ 05 ACigaA ^i W � t � Angeles Nallonai f0ees[ � y u.rn fl � Ang Gies Na1�Vnal Ftlresl In ti Pro je c LSS I Locations Angeles San Cbrgnnln Wt Id amass Me■ SECTION 3 — PROJECT DESCRIPTION 3.1 PROJECT APPROVALS REQUIRED This proposed ISIMND is intended to serve as the primary environmental do actions associated with the proposed project, including project construction and addition, this is the primary reference document for the formulation and impler mitigation monitoring program for the proposed project. The anticipated discretiot equired for the project are identified below. Lead Agency - City of Diamond Bar - Approval of the Mitigated Negative Declaration - Approval of the Plans and Specifications for the Summit Ridge Library Pursuant to Section 22.02.030 of the City Code, the proposed library project is exempt development and land use approval requirements. Although not considered a discretionary approval, the proposed library project will be subn to the State Library Board for grant funding consideration. 3.2 PROJECT CHARACTERISTICS The project site consists of an approximate 0.8 -acre graded pad within the Summit Ridge I The proposed library would be located west of the Community/Senior C nter (t; construction), on the site previously approved as an open space area. The library bui would be an approximate 30,000 square -foot, single -story structure as depicted in Exhit Facilities that would be provided at the library include, but would not be limited to he folloti book stacks and seating, reference collection, Friends of the Library area, computer ai study and meeting rooms, lounge area, lobby/checkout/registration area, cult ral/histt display, children's library area, offices, communication room and homework center, maximum of 20 library staff would be on duty at any given time to operate the facilit . all In a 0 n Parking to accommodate library users would also be provided. To augment the existing 50 parking spaces within the park site, there will be 81 additional parking spaces provided adjac ant to the library. Additionally, 198 spaces adjacent to the Community/Senior Center will also be available for library patrons. Access to the site would be provided from Grand Avenue. To ensure visual consistency, the proposed library project would include landscaping d exterior architectural treatments consistent with the Community/Senior Center to the est. Wood, stone, and earth toned concrete would be used to give a natural/classic expressin. Native vegetation would be incorporated into the landscape plan. The proposed site plan and elevations (west and south) for the library building are resented) in Exhibits 3 and 5, respectively. 3.3 PROJECT PHASING The proposed project would be constructed in one phase. The rough grading for the site is complete as a component of the Community/Senior Center project. Finish grading for the library is projected to begin in fourth quarter 2004 or first quarter of 2005 depending upon availability of project funding; building construction would begin immediately thereafter. Occupancy is projected for first quarter of 2006. U:%Documents and SettingsUmDesWy 00curnerrts5UbraryNEg OEC.doc 3-1 Initial Study/Mingated Summit Ridge Library SECTION 3 – PROJECT DESCRIPTION 3.1 PROJECT APPROVALS REQUIRE© This proposed IS/MND is intended to serve as the primary environmental document for all actions associated with the proposed project, including project construction and operation. In addition, this is the primary reference document for the formulation and implementation of a mitigation monitoring program for the proposed project. The anticipated discretionary approvals required for the project are identified below: Lead Agency - City of Diamond Bar - Approval of the Mitigated Negative Declaration - Approval of the Plans and Specifications for the Summit Ridge Library Pursuant to Section 22.02.430 of the City Code, the proposed library project is exempt from development and land use approval requirements. Although not considered a discretionary approval, the proposed library project will be submitted to the State Library Board for grant funding consideration. 3.2 PROJECT CHARACTERISTICS The project site consists of an approximate 0.8 -acre graded pad within the Summit Ridge Park. The proposed library would be located west of the Community/Senior Center (under construction), on the site previously approved as an open space area. The library building would be an approximate 30,000 square -foot, single -story structure as depicted in Exhibit 4. Facilities that would be provided at the library include, but would not be limited to the following: book stacks and seating, reference collection, Friends of the Library area, computer areas, study and meeting rooms, lounge area, lobby/checkout/registration area, culturawhistorical display, children's library area, offices, communication room and homework center: A maximum of 20 library staff would be on duty at any given time to operate the facility. Parking to accommodate library users would also be provided. To augment the existing 50 parking spaces within the park site, there will be 81 additional parking spaces provided adjacent to the library. Additionally, 198 spaces adjacent to the Community/Senior Center will also be available for library patrons. Access to the site would be provided from Grand Avenue. To ensure visual consistency, the proposed library project would include landscaping and exterior architectural treatments consistent with the Community/Senior Center to the east. Wood, stone, and earth toned concrete would be used to give a natural/classic expression. Native vegetation would be incorporated into the landscape plan. The proposed site plan and elevations (west and south) for the library building are presented in Exhibits 3 and 5, respectively. 3.3 PROJECT PHASING The proposed project would be constructed in one phase. The rough grading for the site is .— complete as a component of the Community/Senior Center project. Finish grading for the library is projected to begin in fourth quarter 2004 or first quarter of 2005 depending upon availability of project funding; building construction would begin immediately thereafter. occupancy is projected for first quarter of 2006. C:0c-_uman1s and SettingsVimDes%My DocummtsMjbra"Eg DEC.doc 3-1 Initial StudyfMitigated Negative Declaration yYY� v • of // � -� / .', i r M x ;U `i ti it 1 LLi Vl 'li J • of // � -� / .', i r M x ;U 3 x L u � o zs --- oa u m O A Y/ y� L7 11 i FLJ N O 1�� N W cr r b O � m V co co fV^ _+ �� ' LLI E 4-) . � - / @ w 2 C & - � \� 7 0 CD ti U" l - �`1 ;i' I' I �I v,'C `.. � '. � �' � O � t' �I � _` v^, v,' SII J J SECTION 4 —ENVIRONMENTAL CHECKLIST FORM This section includes the completed environmental checklist form for the proposed library project. The checklist is used to assist in evaluating the potential environmental impacts of the proposed project. The checklist identifies potential project effects using the following categories: (1) Potentially Significant Impact; (2) Potentially Significant Unless Mitigation Incorporated; (3) Less Than Significant Impact; and, (4) No Impact. Substantiation and clarification for each checklist response is provided in Section 5 (Environmental valuatio) as required by CEQA. Included in each discussion are mitigation measures, as a propriate, that are recommended for implementation of the Summit Ridge Library project. G20co, nenfs and senings'j-Des-Y ooanrents\i. b a"Eg DEC.da 4-1 Initial Study/Mitigated Summit Ridge Library C:VDec rnents and SeitingSUMDOSWY Dooument$UJbraryNEg DEC -cm 4-2 Initial StudylMitigated Negative Declaration Less Than Potentially Significant Less Than ENVIRONMENTAL ISSUES Significant With Significant No (see attachments for information sources) Impact Mitigation Impact Impact I. AESTHI=TICS—Would the r jeci. ali Have a substantial adverse effect on a scenic vista? ❑ ❑ ❑ 0 b) Substantially damage scenic resources, including, but ❑ ❑ not limited to, trees, rock outcroppings, and historic buildings within a state scenic highway? c) Substantially degrade the eAsting visual character or ❑ ❑ 0 ❑ civality of the site and its surroundings? d) Create a new source of substantial light or glare which ❑ • ❑ ❑ would adverse affect day or nighttime views in the area? 11. AGRICULTURAL RESOURCES: In determining whether impacts to.'agricultural-resources are significant environmental effects,"teed: agencies may refer to, the Califomia Agricultural Land .Evaluation and Site .. Assessment Model (1997).prepared by:the Calif©mia'bept.,Of Conservation -'as an optionat model to use in, assessin im acts on a riculture and farmland. Would the,Object: a) Convert Prime Farmland, Unique Farmland, or ❑ ❑ ❑ Farmland of Statewide Importance (Farmland), as shown on the maps prepared pursuant to the Farmland Mapping and Monitoring Program of the California Resources Agency, to non-agricultural use? b) Conflict with existing zoning for agricultural use, or a ❑ © ❑ Williamson Act contract? c) Involve other changes in the existing environment ❑ © ❑ which, due to their location or nature, could result in use? conversion of Farmland, to non-agricultural III. AIR QUALITY—Where applicable, the significance, criteria established by the applicable air quality control district may be relied upon to make the following determinations. Would management or air pollution theproject: a) Conflict with or obstruct implementation of the ❑ ❑ ❑ applicable air qualityplan? b) Violate any air quality standard or contribute ❑ ❑ ❑ substantially to an existing or projected air quality violation? c) Result in a cumulatively considerable net increase of ❑ ❑ ❑ any criteria pollutant for which the project region is in non -attainment under an applicable federal or state ambient air quality standard (including releasing emissions which exceed quantitative thresholds for ozone precursors)? d) Expose sensitive receptors to substantial pollutant ❑ ❑ • ❑ concentrations? e) Create objectionable odors affecting a substantial ❑ ❑ ❑ number of people? C:VDec rnents and SeitingSUMDOSWY Dooument$UJbraryNEg DEC -cm 4-2 Initial StudylMitigated Negative Declaration F. 1 1 ummit Ridge Library Less Than Potentially Significant Less I han ENVIRONMENTAL ISSUES Significant With Signif cant F o see attachments for information sources Impact Mitigation Imp Let Iml act IV. BIOLOGICAL RESOURCES—Wouldthe Pro'ect a) Have a substantial adverse effect, either directly or ❑ ❑ n through habitat modification, on any species identified as a candidate, sensitive, or special status species in local or regional plans, policies, or regulations, or by the California Department of Fish and Game or U.S. Fish and Wildlife Service? b) Have a substantial adverse effect on any riparian ❑ ❑ ❑ habitat or other sensitive natural community identified in local or regional plans, policies, regulations, or by the California Department of Fish and Game or U.S. Fish and Wildlife Service? c) Have a substantial adverse effect on federally ❑ 0 ❑ protected wetlands as defined by Section 404 of the Clean Water Act (including, but not limited to, marsh, vemal pool, coastal, etc.) through direct removal, filling, hydrological interni tion, or other means? d) Interfere substantially with the movement of any native ❑ ❑ resident or migratory fish or wildlife species or with established native resident or migratory wildlife corridors; or impede the use of native nursery sites? e) Conflict with any local policies or ordinances protecting ❑ ❑ ❑ biological resources, such as a tree preservation policy or ordinance? f) Conflict with the provisions of an adopted Habitat ❑ ❑ ❑ Conservation Plan, Natural Community Conservation Plan, or other approved local, regional, or state habitat conservation Ian? V. CULTURAL RESOURCES—Would the ro'ecf: a) Cause a substantial adverse change in the ❑ significance of a historical resource as defined in 15064.5? b) Cause a substantial adverse change in the ❑ ❑ ❑ s significance of an archaeological resource pursuant to § 15064.5? c) Directly or indirectly destroy a unique paleontological ❑ ❑ resource or site or uni ue geological feature? ❑ d) Disturb any human resources, including those interred ❑ ❑ outside of formai cemeteries? ❑ Mocum is and senings4fimDeswy Docun*ntsUjbraryNEg DEC.doc 43 Initial StudylMidgated Neg ion Rtive Declara Summit Ridge library Less Than potentially Significant Less Than ENVIRONMENTAL ISSUES Significant With Significant No (see attachments for information sources) Impact Mitigation Im act Impact VI. .GEOLOGY AND SOILS --Would. theproject: a) Expose people or structures to potential substantial adverse effects, including the risk of loss, injury, or death involving: 1) Rupture of a known earthquake fault, as ❑ ❑ ❑ • delineated on the most recent Alquist-Priolo Earthquake Fault Zoning Map issues by the State Geologist for the area or based on other substantial evidence of a known fault? Refer to Division of Mines and Geology Special Publication 42. ii) Strong seismic ground shaking? ❑ ❑ • ❑ iii) Seismic -related ground failure, including ❑ ❑ ❑ ■ liquefaction? iv) Landslides? ❑ • ❑ b Result in substantial soil erosion or the loss of topsoil? ❑ ❑ • c) Be located on a geologic unit or soil that is unstable, or ❑ ❑ ❑ • that would become unstable as a result of the project, and potentially result in onsite or offsite landslide, lateral spreading, subsidence, liquefaction, or collapse? d) Be located on expansive soil, as defined in Table 18- ❑ © • ❑ 1-B of the Uniform Building Code (1994), creating substantial risks to life orproperty? e) Have soils incapable of adequately supporting the use ❑ U • of septic tanks or alternative waste water disposal systems where sewers are not available for the disposal of waste water? VII. HAZARDS AND HAZARDOUS.,MATERIALS=Wouldtlie roject a) Create a significant hazard to the public or the ❑ ❑ ❑ • environment through the routine transport, use, or dis osal of hazardous materials? b) Create a significant hazard to the public or the ❑ i ❑ ❑ • environment through reasonably foreseeable upset and accident conditions involving the release of hazardous materials into the environment? ❑ • c) Emit hazardous emissions or handle hazardous or ❑ acutely hazardous materials, substances, or waste within one -quarter -mile of an existing or proposed school? 1-3 d) Be located on a site which is included on a list of ❑ hazardous materials sites compiled pursuant to Government Code Section 65962.5 and, as a result, would it create a significant hazard to the public or the environment? c;ooasments and SettinoswirnDesWy Docurnents\UbraryN59 DF"M 4-4 tnifiat Study/Mitigated Negative Dedaration L. J 1 S9 rMmit Ridge L brary Less Than Potentially Significant Less Tian ENVIRONMENTAL ISSUES Significant With Signifi ant N (see attachments for information sources) Impact Mitigation Impa t e) For a project located within an airport land use plan or, ❑ ❑ ❑ -LM-P-1ct where such a pian has not been adopted, within two miles of a public airport or public use airport, would the project result in a safety hazard or people residing or working in a project area? f) For a project within the vicinity of a private airstrip, i 0 would the project result in a safety hazard for people residing or working in the project area? g) Impair implementation of or physically interfere with an ❑ ❑ ❑ 0 adopted emergency response plan or emergency evacuation Ian? h) Expose people or structures to a significant risk of ❑ ❑ ❑ loss, injury, or death involving wildland fires, including where wildlands are adjacent to urbanized areas or where residences are intermixed with wildlands? Vila. HYDROLOGY AND WATER'QUALWY-Would theproject: a) Violate any water quality standards or waste discharge ❑ ❑ ■ requirements? b) Substantially deplete groundwater supplies or interfere ❑ ❑ ❑ substantially with groundwater recharge such that there would be a net deficit in aquifer volume or a lowering of the local groundwater table level (e.g., the production rate of pre-existing nearby wells would drop to a level which would not support existing land uses or planned uses for which permits have been ranted? c) Substantially alter the existing drainage pattern of the ❑ ❑ site or area, including through the alteration of the ❑ i course of a stream or river, in a manner which would result in substantial erosion or siltation onsite or offsite? d) Substantially alter the existing drainage pattern of the ❑ ❑ ❑ site or area, including through the alteration of the # course of a stream or river, or substantially increase the rate or amount of surface runoff in a manner which would result in floodinq Onsite or offsite? e) Create or contribute runoff water which would exceed ❑ ❑ the capacity of existing or planned stonnwater drainage systems or provide substantial additional sources of pollutant runoff? f Otherwise substantially degrade water uali ❑ p ❑ g) Place housing within a '100 -year flood hazard area as ❑ ❑ ❑ mapped on a federal Flood Hazard Boundary or Flood Insurance Rate Map or other flood hazard delineation map? h) Place within a 100 -year flood hazard area structures ❑ ❑ ❑ which would impede or redirect flood flows? 1) Expose people or structures to a significant risk of ❑ ❑ ❑ loss, injury, or death involving flooding, including ■ floodina as a result of the failure of a levee or dam? j) Inundation by seiche, tsunami, or mudfiow7 ❑ ❑ ❑ CADocuments and settingsVimueswy DppumerftAjbraryNEgDEC_doc 45 Initial Study/Mitigated Neg ifive Dedarat 7 Summit Ridge Less Than Potentially Significant Less Than ENVIRONMENTAL ISSUES Significant With Significant No (see attachments for information sources) Impact Mitigation Impact Impact a Physically divide an established communi ? ❑ ❑ ❑ b) Conflict with any applicable land use plans, policy, or © ❑ ❑ • regulation of an agency with jurisdiction over the project (including, but not limited to the general plan, specific plan, local coastal program, or zoning ❑ ❑resource ordinance) adopted for the purpose of avoiding or ❑ ❑ • 11 mitigating an environmental effect' c) Conflict with any applicable habitat conservation plan ❑ ❑ ❑ ❑ or natural community conservation plan? ❑ ❑ D i i..sia.VVVazvw—.s•v......:u the loss of availability of a known mineral ❑ ❑ ❑ 0 that would be of value to the region and the of the state? FResult the loss of availability of a locally -important ❑ ❑resource recovery site delineated on a local ❑ ❑ • 11 neneral clan. specific plan, or other land use plan? At. MUJQC—VVucuu it is pay) a) Exposure of persons to or generation of noise levels in G ❑ • 0 excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies? b) Exposure of persons to or generation of excessive ❑ ❑ • 11 round bome vibration or ground bome noise levels? c) A substantial permanent increase in ambient noise ❑ ❑ ; ❑ levels in the project vicinity above levels existing ❑ ❑ D i without theproject? d) A substantial temporary or periodic increase in ❑ ❑ • Q ambient noise levels in the project vicinity above levels existing without theproject? e) For a project located within an airport land use plan or, ❑ ❑ ❑ ■ where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project expose peopte residing or working in the project area to excessive noise levels? f) For a project within the vicinity of a private airstrip, ❑ ❑ ❑ E would the project expose people residing or working in the nroiect area to excessive noise levels? All. VVI'GLAI IVi'd M111J V.■.V a) Induce substantial population growth in an area, either ❑ G ❑ directly (for example, by proposing new homes and businesses) or indirectly (for example, through the extension of roads or other infrastructure)? b) Displace substantial numbers of existing housing, © ❑ ❑ necessitating the construction of replacement housing elsewhere? c) Displace substantial numbers of people, necessitating ❑ ❑ D i the construction of replacement housing elsewhere? c.occuments and SetdngSU'mDe5\MY Ducuments\ubrare-g DEC.dx 4-6 lnitiai Study/Mitigated Negative Declaration Summit Ridge 1 C:WcGua*nts and SettingstrimDestA4y DorawxntsUbra"EEg DEC.doc 4-7 Initial StudylMitigated Less Than Potentially Significant Less Tian ENVIRONMENTAL ISSUES Significant With Significant N (see attachments for information sources) Impact Mitt ation Impact Imp Xfli. PUBLICSERVICES a) Would the project result in substantial adverse physical impacts associated with the provision of new or physically altered government facilities, need for new or physically altered government facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times, or other performance objectives for any of the public services: Fire protection? ❑ D ■ ❑' Police protection? ❑ ❑ s ❑ Schools? ❑ 0 ❑ ■ Parks? D u ❑ Other public facilities? ❑ ❑ fl � XIV. RECREATION a) Would the project increase the use of existing ❑ ❑ ❑ neighborhood and regional parks or other recreational facilities such that substantial physical deterioration of the facility would occur or be accelerated? b) Dees the project include recreational facilities or C ❑ ❑ require the construction or expansion of recreational facilities which might have an adverse physical effect an the environment? XV. TRANSPORTATIOWRAFFIC—Would theproject: a) Cause an increase in traffic which is substantial in D ❑ _ ❑ relation to the existing traffic load and capacity of the street system (i.e., result in a substantial increase in either the number of vehicle trips, the volume to capacity ratio on roads, or congestion at intersections)? b) Exceed, either individually or cumulatively, a level of ❑ ❑ ■ ❑ .service standard established by the county congestion management agency for designated roads or highways? C) Result in a change in air traffic patterns, including D ❑ fl either an increase in traffic levels or change in location that results in substantial safety risks? d) Substantially increase hazards due to a design feature ❑ ❑ ❑ (e.g., sharp curves or dangerous intersections) or incompatible uses (e.g., farm a ui ment ? e Result in inadequate emergency access? ❑ ❑ ❑ f Result in inadequate parking capacity? ❑ p ❑ g) Conflict with adopted policies, plans, or programs supporting alternative transportation (e.g_, bus D ❑ ❑ tumouts, bicycle racks)? C:WcGua*nts and SettingstrimDestA4y DorawxntsUbra"EEg DEC.doc 4-7 Initial StudylMitigated summit Ridge C:1Decuments and SaWngs'JmDesWly DocumentslLibraryNEg DEC_doc 4-8 rnwar aruayimuigafeU rveynuvc L�M4WQ;„ Less Than Potentially Significant Less Than ENVIRONMENTAL ISSUES (see attachments for information sources) Significant Impact With Mitigation Significant Impact No IM22ct XVI. UTILITIES AND SERVICE SYSTEMS -Would the pro a) Exceed wastewater treatment requirements of the ap2licable Regional Water Quality Control Board? ❑ ❑ • ❑ " b) Require or result in the construction of new water or wastewater treatment facilities or expansion of existing ❑ ❑ • facilities, the construction of which could cause significant environmental effects? c) Require or result in the construction of new storm water drainage facilities or expansion of existing facilities, the construction of which could cause ❑ ❑ • ❑ si nificant environmental effects? d) Have sufficient water supplies available to serve the project from existing entitlements and resources, or D ❑ • ❑ are new ore anded entitlements needed? e) Result in a determination by the wastewater treatment provider which serves or may serve the project that it has inadequate capacity to serve the project's projected demand in addition to the provider's existing ❑ ❑ • ❑ commitments? f) Be served by a landfill with sufficient permitted capacity to accommodate the project's solid waste ❑ ❑ © • disposal needs? g) Comply with federal, state, and local statutes and regulations related to solid waste? ❑ ❑ ❑ • MANDATORY. FINDINGS OF SIGNIFICANCE a. 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 rare or endangered plants or animals, or eliminate important examples of the major periods of California history or prehistory? b. Does the project have the potential to achieve short- term environmental goals to the disadvantage of long- ❑ n ❑ • term environmental goals? c. Does the project have environmental effects which will cause substantial adverse effects on human beings, ❑ © © • either directly or indirectl - d. Does the project have impacts that are individually limited, but cumulatively considerable? ('Cumulatively considerable" means that the incremental effects of a ❑ ❑ ❑ • project are considerable when viewed in connection with the effects of past projects, the effects of other current projects, and the effects of probable future projects)? C:1Decuments and SaWngs'JmDesWly DocumentslLibraryNEg DEC_doc 4-8 rnwar aruayimuigafeU rveynuvc L�M4WQ;„ 1 1 DETERMINATION On the basis of this initial evaluation: 1 find the proposed project COULD NOT have a significant effect on the envie NEGATIVE DECLARATION will be prepared, ■ I find that although the proposed project could have a significant effect on the there will not be a significant effect in this case because of the mitigation mea described in the Mitigated Negative Declaration ❑ 1 find the proposed project MAY have a significant effect on the environment, ENVIRONMENTAL IMPACT REPORT is required, 0 1 find that the proposed project is consistent with the Program EIR on: Date: August 5, J es !De)StetfEno �:e Deputy City Ma ager CADCCUments and Settingsl,fimDesWy Doc nts\UbraryNEA DEC.doc 4-9 Initial StudWitigated an a Summit Ridge SECTION 5- ENVIRONMENTAL EVALUATION 1. AESTHETICS -Would the project: a) Have a substantial adverse effect on a scenic vista? b) Substantially damage scenic resources, including, but not limited to, trees, rock outcroppings, and historic buildings within a state scenic highway? No Impact. The project site is not located in the vicinity of any designated scenic vistas or highways nor would it impede views of scenic resources. There are no scenic resources, rock outcroppings, or historic buildings located on or adjacent to the project site. c) Substantially degrade the existing visual character or quality of the site and its surroundings? Less than Significant Impact. Exhibit 6 provides photographs of the project site taken from vantage points along Grand Avenue and Summit Ridge Drive. As shown in the photos, the project site is currently under construction for the Summit Ridge Community/Senior Center which was approved by the City in February, 2002. Construction will be completed by March 2044. The project site would be visible from Grand Avenue and selectively visible from some residences to the south, east and west. The greatest number of viewers would be along Grand Avenue due to the volume of passing traffic. The proposed single -story library structure would not substantially affect views from vantage points surrounding the site. Views from the south, east and west would not be obstructed. Existing views from these residences would be altered; however, construction of the proposed building on the project site would not substantially alter the existing condition because it is set back more than 300 feet from Grand Avenue. Furthermore, the project site is not a focal point for these view sheds. The background view of the surrounding hills are prominent visual features from most structures in the project vicinity. These views would not be impacted by the proposed project. Landscaping throughout the park and on the perimeter of the project site would serve to soften the visual appearance of the proposed structure and parking areas. The project would be compatible with the visual character and/or quality of the Community/Senior Center building (under construction), existing park areas, and surrounding residential land uses and would therefore not have an adverse effect on the visual character of the study area. d) Create a new source of substantial light or glare which would adversely affect day or nighttime views in the area? Less than Significant with Mitigation. The proposed project would involve the construction of a library, and associated landscaped areas. The proposed structures would include exterior windows and other reflective surfaces and nighttime lighting, and parking lots would require lighting for security. During the day, reflective surfaces could create a source of glare for adjacent residents, and nighttime security lighting could be visible from adjacent residential areas. However, implementation of the mitigation program would reduce potential impacts to a less than significant level. c:%Dccumenis and SetlingsUimDes\My Documents�LihraryNEg DEC.doo - 5-1 Initial Study/Mitigated Negative ueaaranon 1 1 1 MITIGATION PROGRAM MM 1-1 To minimize excessive light and glare, building exteriors s afl use a low reflectance glass. Mirrored glass and other highly reflective buiding matE rials shall not be used on the exterior of the building. MM 1-2 Plant material, sidewalk paving, and other architectural design featires included in the project landscape plans shall be incorporated n and around buildings to decrease reffectivity of constructed facilities and I ght and glare toward adjacent residences. MM 1-3 Outside light fixtures shall be consistent with the City of Diamc Code, and the National Electrical Code, and shall be designE at downward angles. Exterior fighting fixtures shall use low fixtures to reduce light intrusion onto adjacent land uses and o With application of the mitigation program, the proposed project significant aesthetics impacts. No additional mitigation is required. II_ AGRICULTURAL RESOURCES: Would the project: a) Convert Prime Farmland, Unique Farmland, or Farmland of Statewic (Farmland), as shown on the maps prepared pursuant to the Farm and Monitoring Program of the California Resources Agency, to ne use? b) Conflict with existing zoning for agricultural use, or a Williamson Act c) Involve other changes in the existing environment which, due to th( nature, could result in conversion of Farmland, to non-agricultural us No Impact. The proposed project site consists of a graded pad which has completed as part of the Summit Ridge Community/Senior Center projec the project site was a portion of an active park. The site was cleared as a the CommunitylSenior center project. The proposed project would not cor to non-agricultural use. The site is not covered by a Williamson Act Contre on land designated Prime Farmland, Unique Farmland, or Farmland Importance, according to 1997 Natural Resource Conservation Service i agricultural resources impacts are anticipated. Ill. AIR QUALITY— Would the project. a) Conflict with or obstruct implementation of the applicable air quality p b) Violate any air quality standard or contribute substantially to an projected air quality violation? c) Result in a cumulatively considerable net increase of any criteria I which the project region is in non -attainment under an applicable fed ambient air quality standard (including releasing emissions wt quantitative thresholds for ozone precursors)? d) Expose sensitive receptors to substantial pollutant concentrations? I Bar and i space. not result in a map ing igricult ral ntract? location or ,en recently Previo sly, mponer t of ;rt farmf and nor locz ted Statewide .ppinq_ No in? existing I or or Less than Significant with Mitigation (a);Iess than significant (b,c,d). CaliforniE is divided by the California Air Resources Board (GARB) into air basins which share sim lar meteorological and topographical features. The project site is within the South Coast Air Basin (SCAB), a 6,600 square mile area comprised of Orange County and then n- CADocuments and Settings\,�mDes%My D=menrS\Libr2"Eg DEC.dac 5-2 Initial srudynw#lyatea Summit Ridge Library desert portions of Los Angeles, Riverside, and San Bernardino counties. The Basin's climate and topography are highly conducive to the formation and transport of air pollution. The air pollutants of greatest concern in the SCAB are ozone (03), carbon monoxide (CO), and fine particulate matter (PM,o). Peak concentrations have dropped significantly throughout the air basin as a result of strict new emission controls and - reformulated gasoline sold in winter months. The SCAB is under the jurisdiction of the South Coast Air Quality Management District (SCAQMD). Diamond Bar is in the Pomona/Walnut Valley Air Monitoring Subregion Source Receptor Area 10 (SRA -10). The pollutant for which SRA -10 of the SCAB is designated a non -attainment area for national ambient standards is Ozone (03). 03 is a colorless, odorless pollutant formed by a chemical reaction between volatile organic compounds (VOCs) and oxides of. nitrogen (NO,) in the presence of sunlight. The primary sources of VOCs and NO, are mobile, including cars, trucks; buses, agricultural and construction equipment. SRA -10 does not currently measure ambient PM1D levels. However, many subregions within SCAG consistently exceed state standards fro PM,o concentrations. PM70 consists of fugitive dust caused by soil disturbances such as construction grading and causes a greater health risk than larger -sized particles, since these fine particles can be inhaled more easily and irritate the lungs by themselves and in combination with gases. A project's air quality impacts can be separated into short-term impacts from construction and long-term permanent impacts from project operations. The potential short-term and long-term impacts of the proposed project are discussed below. To determine whether emissions resulting from construction of a project are significant, the SCAQMD recommends significance thresholds in its CEQA Air Quality Handbook, as revisedin November 1993 and approved by the SCAQMD's Board of Directors. The pollutants addressed by the SCAQMD thresholds include carbon monoxide (CO), sulfur oxides (SO,), nitrogen oxides (NOX), particulate matter (PM,o), and reactive organic compounds. Based on the size of the project (approximately 0.8 acre) there is a low potential for PM,o emissions thresholds to be exceeded by the proposed project. The SCAQMD has established a threshold of 150 pounds per day, and 6.75 tons per quarter for PM,o emissions. The City has determined that these thresholds are appropriate for the project, in order to ensure regional consistency, and based on the best available scientific information. CONSTRUCTION -RELATED AIR QUALITY IMPACTS Air quality impacts of a project may occur during construction on both a regional and local scale. Construction impacts can include airborne dust from grading, demolition, and dirt hauling, and gaseous emissions from heavy equipment, delivery and dirt hauling trucks, employee vehicles, and paints and coatings. The SCAQMD CEQA Handbook estimates that each acre of disturbed soil creates 26.4 pounds/day of PM,o. The project site was planned as an open, landscaped area as part of the Summit Ridge Community/Senior Center project and has already been rough graded for that use. Implementation of the proposed library project would require additional grading to develop a pad for the proposed library structure. If the entire approximately 0.8 acre library site were to be graded in one day, PM10 emissions would be approximately 21.1 pounds per day, prior to implementation of standard conditions of approval_ In actuality, the project site would not be graded in one day, and the daily emission levels would be less. These emission levels would not exceed the SCAQMD's threshold for PM,o of 100 G:%Documents and Sett,.gs�.ImDesWy Doatn*ntSjjb aryNEg DEC-doc 5-3 Intrad btUdy1M11lgatea negauve MUdrauvn ummit Ridge Librmy pounds per day. It should be noted that the grading for the Summit idge Community/Senior Center would be completed prior to initiation of the fi ial gradir g for the proposed library. Additionally, with implementation of the standar conditia is of approval listed below, there would be no cumulative impacts as fugitive 1 lust emis ions from areas previously graded would be eliminated by ensuring that th Dse area are watered as often as necessary each day in order to maintain a crust arid preveril any dust from being released to the atmosphere. Therefore, short-term cons ruction -re ated air quality impacts are not considered significant. LONG-TERM OPERATIONAL_ EMISSIONS The primary source of operational emissions associated with the proposec project mould be from residents using the library, and employee vehicle travel to and fr m the pr jest site. Based upon the relatively few traffic trips per day generated by the pi oject (i.e. 480 average daily trips), emissions from this source is not considered ignificant A comparatively small amount of gaseous emissions would occur from n tural gas and electricity usage. Therefore, the project would not have a significant long- rm air q ality impact from operations and would not conflict with implementation of the A MP. e) Create objectionable odors affecting a substantial number of people? No Impact The proposed project involves the construction of a library and would not involve uses which could create odors considered objectionable to surroun ing residential uses. No impacts are anticipated. MITIGATION PROGRAM MM 3-3 All construction contractors shall comply with SCAQMD regulati ns, including Rule 402, the Nuisance Rule, and Rule 403, Fugitive Dust. Because the area undergoing grading is below the size for which Rule 403 r quires that a grading plan be developed and submitted to the District prior to beginiting work, it is exempt from this portion of the rule. However, the rule requires that all grading projects apply at least one of the best available control measures for fugitive dust. To insure that the project is in full complialce with both dust regulations and that there is no nuisance impact off-site, the contractor will implement all of the following: $ Moisten soil not more than 15 minutes prior to moving it. $ Apply chemical stabilizers to disturbed surface areas (completed gracing areas) within five days of completing grading or apply dust 3uppressants or vegetation sufficient to maintain a stabilized surface. $ Water exposed surfaces at least twice a day under calm conditions nd as often as needed on windy days or during very dry weather in order to maintain a surface crust and prevent the release of visible emissions f m the construction site. $ Cease grading when winds exceed 25 miles per hour. $ Provide for street sweeping, as needed, on adjacent roadways to dirt dropped by construction vehicles or mud which would othei carried off by trucks departing project sites. C:1Documents and SettlngsUmDesWy DwumerdsllihraryNEg OEC.doc 5.4. Initial Study/Mitigated Summit Ridge Library pounds per day. It should be noted that the grading for the Summit Ridge Community/Senior Center would be completed prior to initiation of the final grading for the proposed library. Additionally, with implementation of the standard conditions of approval listed below, there would be no cumulative impacts as fugitive dust emissions from areas previously graded would be eliminated by ensuring that these areas are watered as often as necessary each day in order to maintain a crust and prevent any dust from being released to the atmosphere. Therefore, short-term construction -related air quality impacts are not considered significant. LONG-TERM OPERATIONAL EMISSIONS The primary source of operational emissions associated with the proposed project would be from residents using the library, and employee vehicle travel to and from the project site. Based upon the relatively few traffic trips per day generated by the project (i.e., 480 average daily trips), emissions from this source is not considered significant. A comparatively small amount of gaseous emissions would occur from natural gas and electricity usage. Therefore, the project would not have a significant long-term air quality impact from operations and would not conflict with implementation of the AQMP. e) Create objectionable odors affecting a substantial number of people? No Impact. The proposed project involves the construction of a library and would not involve uses which could create odors considered objectionable to surrounding residential uses. No impacts are anticipated. MITIGATION PROGRAM MM 3-3 All construction contractors shall comply with SCAQMD regulations, including Rule 402, the Nuisance Rule, and Rule 403, Fugitive Dust. Because the area undergoing grading is below the size for which Rule 403 requires that a grading plan be developed and submitted to the District prior to beginning work, it is exempt from this portion of the rule. However, the rule requires that all grading projects apply at least one of the best available control measures for fugitive dust. To insure that the project is in full compliance with both dust regulations and that there is no nuisance impact off-site, the contractor will implement all of the following: $ Moisten soil not more than 15 minutes prior to moving it. $ Apply chemical stabilizers to disturbed surface areas (completed grading areas) within five days of completing grading or apply dust suppressants or vegetation sufficient to maintain a stabilized surface. $ Water exposed surfaces at least twice a day under calm conditions and as often as needed on windy days or during very dry weather in order to maintain a surface crust and prevent the release of visible emissions from the construction site. $ Cease grading when winds exceed 25 miles per hour. $ Provide for street sweeping, as needed, on adjacent roadways to remove dirt dropped by construction vehicles or mud which would otherwise be carried off by trucks departing project sites. CADuments and SaWngsUmDesWN 00cumentS\Ubfa0E9 DEC-doc 5-4 Initial Stuay1MMga1ea neganve $ Maintain two feet of freeboard capacity on all trucks $ Tightly cover all loads of dirt with a tarp on all trucks $ Apply extra water; if needed, to comply with provisions of 402, Nuisance, to insure that no visible emissions frc activities can be observed beyond the property line. After mitigation, all construction emissions will be reduced to a level con. significant. Mitigation measures, including adherence to Rule 402, will pre any adjacent sensitive receptors to adverse emissions. Operational emi carbon monoxide concentrations are not significant and require no mitigati( no significant adverse odors associated with the project during either operation. IV. BIOLOGICAL RESOURCES—Would the project: a) Have a substantial adverse effect, either directly or through habitat on any species identified as a candidate, sensitive, or special stat local or regional pians, policies, or regulations, or by the California I Fish and Game or U.S. Fish and Wildlife Service? No Impact The project site has been graded as part of the Community/Senior Center project which was previously approved by the of vegetation associated with grading the approximate 7 -acre Community (including the approximate 0.8 -acre site for the proposed library) was ad IS/MND prepared for the Summit Ridge Community/Senior Center, mitigation has been implemented. There is no vegetation remaining on t therefore, the proposed project would not impact any biological resources. The native vegetation which remains in park areas surrounding the proje( sage scrub, coast live oak woodland, and non-native grassland) does pro) for wildlife. Common amphibian and reptile species observed or expect. include Pacific tree frog (Hyla regilia), western toad (Bufo boreas), F salamander (Batrachoseps pacificus), western fence lizard (Sceloporus side -blotched lizard (Uta stansburinana), southern alligator lizard multicarinatus), gopher snake (Pituophis melanoleucus), and wester (Crotalus viridis). Common bird species observed during the survey incl dove (Zenaida macroura), Anna's hummingbird (Calypte ansa), Nuttall'; (Picoides nuttallir), black phoebe (Sayornis nigricans), Say's phoebe (& western scrub jay (Aphelocoma californica), western bluebird (Sialic mexic mockingbird (Mimes polyglottos), cedar waxwing (Bombycilla cedrorum), y warbler (Dendroica coronata), white -crowned sparrow (Zonotrichia leuco goldfinch (Carduelis psaltria), and house finch (Carpodacus mexicanus). harrier (Circus cyaneus) was the only raptor (bird of prey) species obsery biological survey conducted on the site during preparation of the IS/ Community/Senior Center. The northern harrier would be expected tc grassland within and adjacent to the park. Other common raptor species American kestrel (Falco sparverius) and red -shouldered hawk (Buteo . expected to forage and potentially nest in trees within the park and surroi There are no trees on the proposed library site. Mammal species or evic C:tiDOCuments and SettingsUmDeskmy DD0un%nts\UbraryNEg DEC.dw 5-5 Initial studYINUgated � the site. CAQMD uie E constru tion red less han it expose a of ms and ocal There w Il be instructio i or species in partme t of mmit R dge ty. The loss enior Center essed in the nd required projectsite; site (costat le resouJces l on thesite J during IND for nest in such as leatus), Summit Ridge Library presence observed within the project area (prior to grading activities) included desert cottontail (Sylvilagus audubonb) and coyote (Canis latrans). _ Coastal sage scrub occurs in some areas within the park which have not been impacted by grading activities. Sage scrub is considered a special status vegetation type because of its high potential to support Threatened and Endangered wildlife species, including the coastal California gnatcatcher (Polioptila califomica califomica). The proposed project would not impact coastal sage scrub habitat or the coastal California gnatcatcher because the project site has already been graded, and there is no vegetation remaining. The coastal California gnatcatcher has been reported in the Cities of Walnut and Yorba Linda, in Bonelli Regional Park and in the Chino Hills (CDFG 2001). However, the project site is not located within critical habitat for the coastal California gnatcatcher. Due to the lack of vegetation/habitat, the coastal California gnatcatcher would not occur on the project site. There are no trees located on the project site; therefore, the project would not have direct impacts on any raptor (bird of prey) species. However, raptor species may nest in the large oak, and gum (Eucalyptus spp.) trees that were retained to the east of the project site. Also, the northern harrier has potential to nest in the grassland on the slopes below the park. The Regulations by the CDI=G prohibit activities having the potential to disturb active raptor nests, a protection that is generally discontinued once nesting activity is completed. The nesting season for raptors is February 1 to June 30. Construction activities for the proposed library project would not occur during the nesting season; therefore, no indirect impacts to raptors would result from implementation of the proposed project. No mitigation is required. b) Have a substantial adverse effect on any riparian habitat or other sensitive natural community identified in local or regional plans, policies, regulations, or by the California Department of Fish and Game or U.S. Fish and Wildlife Service? c) Have a substantial adverse effect on federally protected wetlands as defined by Section 404 of the Clean Water Act (including, but not limited to, marsh, vernal pool, coastal, etc.) through direct removal, filling, hydrological interruption, or other means? d) Interfere substantially with the movement of any native resident or migratory fish or wildlife species or with established native resident or migratory wildlife corridors, or impede the use of native nursery sites? No lmpact. Wetlands and "waters of the United States" are protected under Section 404 of the Clean Water Act and are under the jurisdiction of the U.S. Army Corps of Engineers (ACOE). The project site has been graded and there are no wetlands or riparian habitat on the project site. There are drainages south of the project site which may be used for wildlife movement; however, the proposed project would not impact these drainages, and would not interfere with wildlife movement. No impacts to riparian habitat, wetlands, or wildlife movement would result from implementation of the proposed project. e) Conflict with any local policies or ordinances protecting biological resources, such as a tree preservation policy or ordinance? No Impact The City of Diamond Bar has a Tree Preservation and Protection Ordinance. Any removal of oaks (Quercus sp.), walnuts (Juglans sp.), sycamores (Platanus racernosa), willows (Salix sp.), or naturalized pepper trees (Schinus molle) would be subject to the local tree ordinance. Any trees removed are required to be C 1powffn-nts and settingsUfrDeSWY Oocex�=VjbraryWg DMAcc 5 6 Initial Study/Mitigated Negative Declaration mitigated at a ratio of 3:1. Coast live oaks (Quercus agrifolia) are located within the coast live oak woodland on the slopes below the project site. However, the project site has been graded, and there are no trees located on the project site. The City's tree ordinance also requires protection of trees adjacent to proposed development d ring construction. There are no trees in proximity to the site which would beimpacted dL ring construction. No mitigation is required. f) Conflict with the provisions of an adopted Habitat ConservationIan, Natural Community Conservation Pian, or other approved local, regional, or state hat !tat conservation plan? No Impact The project site is not within an adopted Habitat Conservation Plan, Nat ral Community Conservation Plan or other habitat conservation plan area. No impacts are anticipated. V. CULTURAL RESOURCES—Would the project.- a) roject. a) Cause a substantial adverse change in the significance of a historic defined in §15064.5? b) Cause a substantial adverse change in the significance of an resource pursuant to §15064.5? c) Directly or indirectly destroy a unique paleontological resource or geological feature? d) Disturb any human remains, including those interred outs! cemeteries? No Impacf. The project site is located on a hilltop which was graded durin( of the original Summit Ridge Park and, more recently, the Community/Senkc historic or paleontological resources were uncovered during grading and no to exist on the project site. Furthermore, no historic or paleontological re. uncovered during grading and construction of surrounding homes in tf vicinity of the project site. Additional grading that would be required for a the proposed library would occur on fill material and would not have the impact cultural resources. No mitigation is required. VI. GEOLOGY AND SOILS—Would the project: a) Expose people or structures to potential substantial adverse effects, ii risk of loss, injury, or death involving: 1) Rupture of a known earthquake fault, as delineated on the most re( Priolo Earthquake Fault Zoning Map issued by the State Geologist or based on other substantial evidence of a known fault? Refer tc Mines and Geology Special Publication 42. iii) Seismic -related ground failure, including liquefaction? c) Be located on a geologic unit or soil that is unstable, or that woi unstable as a result of the project, and potentially result in onsit landslide, lateral spreading, subsidence, liquefaction, or collapse? e) Have soils incapable of adequately supporting the use of septi alternative waste water disposal systems where sewers are not avail disposal of waste water? No Impact. The project site is not located within an established Alquist- Zone as delineated by Division of Mines and Geology Special Publicati( CADocuments and Satt4VM,fimDesWly Documentsliibrd"Eg DEC.doc 5-7 Initial Study/Mitigated Neg resourc as haeolog cal e or ung ue of for al construe on Center.No e are kn n )urces w re , immediate istruction of potential to eluding I ie int Alqui t - ©r the ar a Division of [d becoe or offs to tanks Dr ble fort e nolo Stu y 1 42. Tlhe Summit Ridge Library potential for ground rupture from fault movement within the site boundaries is considered to be negligible as there are no major active or potentially active faults known to traverse the project site. The potential for liquefaction or other seismically induced ground failure such as ground lurching, and seismically induced settling during periods of high ground shaking is considered to be negligible for the developed site, due to the presence of dense soils and the absence of shallow ground water. The project site is currently being graded in accordance with approved plans for the Community/Senior Center. Upon completion of grading activities, there would be no potential impacts associated with soil stability. Previous soil conditions identified within or surrounding the project site have been remediated during the current grading activities. The proposed project would not involve the use of septic tanks or alternate wastewater disposal systems. No impacts would result, and no mitigation is required. a) continued ii) Strong seismic ground shaking? iv) Landslides? b) Result in substantial soil erosion or the loss of topsoil? d) Be located on expansive soil, as defied in Table 18-1-B of the Uniform Building Code (1994), creating substantial risks to life or property? Less than Significant Impact. The project site is located in southern California, a seismically active region. There are a number of known active faults in the region, resulting in the potential for seismic ground shaking to occur at the site. Active faults include the Chino Elsinore fault (located approximately one mile to the southeast of the project site), Elysian Park thrust Puente Hills segment (located approximately three miles to the west of the project site), the Central Avenue fault (located approximately four miles to the east of the project site), the San .lose fault (located approximately five miles to the north of the project site), and the Whittier fault (located approximately six miles to the southwest of the project site). The Chino Elsinore fault is the closest active fault to the project site. The relatively close proximity of this fault (approximately one mile distant) places the region in an area of high seismic activity, exposing the project site to potentially severe ground shaking hazards. The maximum credible earthquake magnitude from this fault is 6.7 and the peak horizontal ground acceleration is 0.59 g (g is the acceleration of gravity, equal to 32 feet/second)- The San Jose, Central Avenue, and Whittier faults are all of late Quarternary age and have not experienced activity for several thousand years. The project site is underlain by bedrock of the upper Miocene Puente Formation which is composed primarily of marine sediments such as thinly bedded siltstone with interbeds of light brown, fine to medium -grained sandstone. Surficial units consist of landslide debris, alluvium, colluvium, and artificial fill. Landslide debris consists of weathered and broken bedrock that has accumulated on the natural slopes in the northwest portion of the site. Alluvium is concentrated in the undeveloped canyon areas north and west of the site. Colluvium is present in the majority of the project site and underlies the topsoil at a depth of one to two -feet. Controlled artificial fill has been placed along the eastern portion of the park. This fill was placed to achieve design grade for the ball field and access road areas during original park grading in the late 1980's. C:Tccuments and scaugsuimDeMyDocumeMsUbm"E9 DEC.doc 5-5 initial study/Mitigated Negative Declaration There is a potential for soil erosion during grading and construction operat ons. However, provisions for surface drainage, terrace drains, slope plants g, and other measures outlined in the approved Stormwater Pollution and Prevention Plan (SW PP) for the Community/Senior Center project site (which includes the proposad library site) are discussed in Section 8 (Hydrology and Water Quality) of this Initia Study Muld reduce the erosion potential to a level considered less than significant. During current grading activities at the site, the soil was over -excavated in areas w ere highly expansive clays were encountered. Additionally, further test ng wouf be performed after rough grading on near -surface soils in order to d termine final foundation recommendations for the proposed library. The project w uld not ave impacts related to expansive soils. The proposed library and structure are required to be designed in a ordance with Uniform Building Code (UBC) standards, and other City of Diamond Bar, state, and federal agency requirements. Design would undergo review by the Citj Engineer to ensure compliance with the aforementioned standards. With proper d sign, impacts associated with seismic groundshaking, landslide hazards, erosion, anor expan ive soils would be considered less than significant. VII. HAZARDS AND HAZARDOUS MATERIALS --Would the project: a) Create a significant hazard to the public or the environment through the routine transport, use, or disposal of hazardous materials? b) Create a significant hazard to the public or the environment through reasonably foreseeable upset and accident conditions involving the release of hazardous materials into the environment? c) Emit hazardous emissions or handle hazardous or acutely hazardous maters Is, substances, or waste within one -quarter -mile of an existing or propos d schoo ? d) Be located on a site which is included on a list of hazardous mz terials s tes compiled pursuant to Government Code Section 65962.5 and, as a re Mt, would it create a significant hazard to the public or the environment? e) For a project located within an airport land use plan or, where such a Ian has of been adopted, within two miles of a public airport or public use airpo , would he project result in a safety hazard or people residing or working in a pro ect area . f) For a project within the vicinity of a private airstrip, would the projemt result i a safety hazard for people residing or working in the project area? g) Impair implementation of or physically interfere with an adopted emergency response plan or emergency evacuation plan? h) Expose people or structures to a significant risk of loss, injury, or death involy ng wild land fires, including where wildlands are adjacent to urbanized areas or where residences are intermixed with wildlands? No Irnpact. The project site was vacant prior to its development as a community park. No uses involving the transport, storage, use, emission, or disposal of hazardous materials has occurred on the project site. The proposed project would not involve the routine transport, storage, use, emission, or disposal of hazardous materials. The site is not located within one -quarter -mile of an existing school nor would it a it hazardous emissions or involve the handling of hazardous or acutely hazardous materials or substances. The project site is not included on a list of hazard us materials sites as compiled pursuant to Government Code Section 65962.5, nor is it 1 Gated wit lin an airport land use plan or within the vicinity of a private airstrip. The prof ct would not CADOC MS and SettingsVinA)esWly Dowry uftV_ihraryNEg DEC_doc 5-9 Initial StudylMiNgated Summit Ridge Library physically interfere with an adopted emergency response plan or emergency evacuation plan. The proposed structure (i.e., the library project ) will be constructed adjacent to natural open space which could be considered to be wildlands. However, the project does not involve the construction of residential structures and would not increase the risk of loss, injury, or death involving wildland fires. No significant impacts are anticipated. Vill. HYDROLOGY AND WATER QUALITY Would the project: a) Violate any water quality standards or waste discharge requirements? Less than Significant Impact. Construction activities such as grading, excavation, and trenching for site improvements would result in disturbance of soils on the project site. Runoff from the project site during construction could transport soils and sediments from these activities. Spills or leaks from heavy equipment and machinery, staging areas, or building sites could also enter runoff. Typical pollutants could include petroleum products and heavy metals from equipment and products such as paints, solvents, and cleaning agents that could contain hazardous constituents. Potentially significant short- term water quality impacts could result if polluted runoff enters downstream receiving waters. The Federal Clean Water Act establishes a framework for regulating potential water quality impacts from construction activities through the U.S. Environmental Protection Agency's National Pollutant Discharge Elimination System (NPDES) program. Construction activities that involve more than five acres are required to obtain coverage under the general NPDES Permit for stormwater discharges associated with construction activities issued by the State Water Resources Control Board (SWRCB). The Regional Water Quality Control Boards oversee the implementation and enforcement of the general permits. The City of Diamond Bar is within the Los Angeles Basin Region (4). Diamond Bar is a co -permittee with the County of Los Angeles for local NPDES permits. Potential erosion, siltation and other water quality impacts during construction of the proposed library project would be managed through the implementation of a Stormwater Pollution Prevention Plan (SWPPP). Although the proposed library site is exempt from regulation under the NPDES program because it is less than one acre, the SWPPP that was prepared by the City of Diamond Bar for the Summit Ridge Community/Senior Center is applicable to the library project, which is within the Community/Senior Center site. The SWPPP is available for review at Diamond Bar City Hall. The plan describes the measures and practices to control pollutants during both the construction and post - construction phases of the project. The SWPPP contains a list of target structural and non-structural best management practices (BMPs) which would be used to control, prevent, remove or reduce pollution that might result during project construction and operation. Structural BMPs involve the construction, modification, operation, maintenance, or monitoring of facilities developed to minimize the introduction of pollutants into the drainage system or to remove pollutants from the drainage system. Non-structural BMPs are activities, programs, and other non-physical measures that contribute to the reduction of pollutants from non -point sources to the drainage system. BMPs within the SWPPP include erosion control measures (e.g., temporary desilting basins, concrete waste management, down drains, gravel bag or UV treated sand bag cmocumenis and Set ings'JmDesft DowmanulE.ihraryNEO DEC -d- 5-10 initial Studynwifigaled Negative Declaration dikes, street sweeping and washing, and slope protection), m nagemen of contaminated soils, hazardous waste management, vehicle and construction equipment storage and maintenance procedures, and the timing of grading to avoid the iainy season (November through April). In addition to the requirements of the NP ES program, provisions of the Uniform Building Code, and grading permit requirements specified by the City include elements that also require reduction oi erosion and sedimentation impacts. Implementation of the SWPPP would ensure f(III compliance with applicable local, state, and federal water quality standards and reduce impacts to a level considered less than significant. Once developed, the proposed project would have the potential to causE water q impacts typical of urbanization, including oil, grease, refuse and tire parliculate n from vehicles parking and driving within the parking lots. The increa a in poll sources leads to an increase in pollutant loads found in storm water, while the incl in impervious surfaces prevents natural processes from reducing those p Ilutant li The impervious surfaces associated with urbanization prevent storm water infiltrating into the soil resulting in storm water flows that are typically hig ler in vc and pollutant loads. Implementation of the SWPPP would reduce impacts to a less significant level through post construction BIVIPs such as vveekly sweeping/washing of project parking lots. It should be noted that landscaping can contribute pesticides and phospha a fertilizers to storrnwater runoff. As noted in the project description, landscaping on ttie project site will consist primarily of native vegetation, thereby substantially reducing the need for pesticide and fertilizer use onsite. No significant impacts are anticipated. b) Substantially deplete groundwater supplies or interfere substantially Vrith groundwater recharge such that there would be a net deficit in aquifer volume dr a lowering of the local groundwater table level (e.g., the production rate of re - existing nearby wells would drop to a level which would not support existing land uses or planned uses for which permits have been granted? c) Substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of a stream or river, in a manner I vhich would result in substantial erosion or siltation onsite or offsite? d) Substantially alter the existing drainage pattern of the site or are 3, includ ng through the alteration of the course of a stream or river, or substanti Ily incre se the rate or amount of surface runoff in a manner which would result in flood ng onsite or offsite? e) Create or contribute runoff water which would exceed the capacity o existing or planned stormwater drainage systems or provide substantial additional sources of pollutant runoff? f) Otherwise substantially degrade water duality? g) Place housing within a 100 -year flood hazard area as mapped on a federal FI d Hazard Boundary or Flood Insurance Rate Map or other flood hazard delineation map h) Place within a 100 -year flood hazard area structures which would impede or redirect flood flows? 1) Expose people or structures to a significant risk of loss, injury, or de a h involve ig flooding, including flooding as a result of the failure of a levee or dam? j) Inundation by seiche, tsunami, or mudflow? No Impact. The proposed project is located in the San Gabriel watershed whi h encompasses 462,080 acres in the Los Angeles and Orange Counti s. Aqui er CADocuumts and Ser ingsUnlDesMMy DcCurnents\UbraryNEg DEC.dx 5-11 Initial Stvdy/MiNgated N tive C)eClara 'on Summit Ridge Library recharge occurs primarily within the gullies, canyon bottoms, and washes in the vicinity of the project site. Given that the project site is located on a hilltop and stormwater generated onsite would either flow into natural open space areas and storm drains or percolate into onsite soils, the proposed project would not impact aquifer recharge. The project site is located at the top of a hill and is currently under construction for the Community/Senior Center project_ Upon completion, the developed project site would be divided into three main drainage areas: the eastern portion of the eastern parking lot; the eastern parking lot and Community/Senior Center and associated landscaping; and the western parking lotlproposed library and associated landscaping. Stormwater flows originating on the eastem portion of the eastern parking lot would be conveyed by curb gutters in two directions to catch -basins which will drain to existing storm drains in Softwind Drive and Summit Ridge Drive. Flows originating in the majority of the eastern parking lot, the proposed structures, and associated landscaping at the center of the project site would be conveyed via street and curb gutters to a catch -basin at the top of the Summit Ridge entryway and conveyed to the open field adjacent to the baseball diamond where it will be allowed to percolate into the gradual turf slope. Flows originating in the western parking lot, the site of the library, and portions of the landscaped areas in the north -central portion of the project site will drain to a gunnite bench drain which will drain to three rip -rap dissipaters in the natural area to the north of the project site and thereafter into natural open space off-site (to the north). Construction of the proposed library project would not substantially alter the existing drainage pattern or increase offsite stormwater flows. Therefore, the proposed project would not be expected to result in erosion, siltation, or flooding on the site and/or surrounding area nor result in stormwater flows which could exceed the capacity of existing or planned stormwater drainage systems. No impacts are anticipated. The project does not involve the construction of housing. Additionally, the project site is located atop a hill and is not within a 100 -year flood hazard area. Therefore, the proposed project would not result in a risk of loss of life or injury involving flooding, including potential failure of a levee or dam. Tsunamis are seismically induced sea waves generated by offshore earthquake, submarine landslide, or volcanic activity. Due to the distance from the ocean, the proposed project is not subject to tsunami hazards. Seiches are another type of water - related seismically induced hazard involving flooding resulting from the overtopping of an inland water body's banks by seismically induced waves. Given the altitude of the project site it is not at risk of inundation by seiche event. Furthermore, there are no major lakes or open water impoundments in the vicinity of the project site. Therefore, the site is not subject to seiche hazards. No impacts are anticipated. MITIGATION PROGRAM MM 7-1 Mitigation requirements outlined in the SWPPP for the Community/Senior Center project site (which includes the library site) shall be implemented during construction of the library project. IX. LAND USE AND PLANNING Would the project: a) Physically divide an established community? c) Conflict with any applicable habitat conservation plan or natural community conservation plan? CN)ocuments and SetbngsUimoeewly odoW*nssu,aWnNE9 DEC-doc 5-12 Initial Study/Mitigated Negative uaelaranon St immit Ridge L brary No Impact. The proposed project site is located at the center of three diff rens community/neighborhoods which have formed as a result of highly varia and distinct general plan land use designations. The project site is desig le topography iated as park space by the City of Diamond Bar general plan and acts as a hub that is s lared by l cal residents within these neighborhoods, as well as other residents within I he City. The project would not result in the physical division of an establishe( commu ity. Additionally, the project site is not covered under a habitat conservation F Ian or natural community conservation plan. No impacts are anticipated. b) Conflict with any applicable land use plans, policy, or regulation of an agency lVith jurisdiction over the project (including, but not limited to the general plan, specific plan, local coastal program, or coning ordinance) adopted for th purpose of avoiding or mitigating an environmental effect? No Impact. The City of Diamond Bar was incorporated in 1989. Prior to ncorporc the City followed the guidelines and policies of the County of Los Angeles general and zoning code. The City of Diamond Bar adopted its own general plar in 1995 Development Code in 1999. The project site is currently designated in the Diamond Bar general plan as park spacE (PK). The PK designation includes existing and future public parks; however, this 1 nc use designation does not specifically define the types of park facilities provided or place restrictions on types of structures that can be developed on park facilities'. Therefore, the proposed project would not conflict with the general plan designation. The project site is zoned R-1. The proposed library project would be consistent with the R-1 zoning district. The proposed project will fulfill the intent of the land us designation imposed upon the property by the City of Diamond Bar general plan. Fur hermore, the project involves the addition of infrastructure to an existing park and would i lot result in a change of land use. Therefore, the change would not result in a signifi ant land se impact. X. MINERAL RESOURCES—Would the project: a) Result in the loss of availability of a known mineral resource that would be of value to the region and the residents of the state? b) Result in the loss of availability of a locally -important mineral resourDe recovery site delineated on a local general plan, specific plan, or other land use Ian? No Impact. The Surface Mining and Reclamation Act of 1975 (SMARA) niandatec initiation of mineral land classification by the State Geologist in order to help identify protect mineral resources in areas within the State subject to urban expan ion or t irreversible land uses which would preclude mineral extraction. SMARA also alto the State Mining and Geology Board (SMGB) to designate lands contai ing mir deposits of regional or statewide significance in accordance with classific tion cri from the State Geologist. Four mineral resource zone (MRZ) categories have been identified by the Geologist: The MRZ-1 designation identifies areas where adequate geologic information in( that no significant mineral deposits are present, or where it is judged that lit tod lik4 exists for their presence. The MRZ-2 designation identifies areas where Q C:10oc nts and SettingsU mDes\My Oocuments%libraryNEg DEC.doe 5-13 Initial StudylAftfgated Summit Ridge Library indicates that significant resources or inferred resources are present. The MRZ-3 designation identifies areas of undetermined mineral resources. The MRZ-4 designation identifies areas where geologic information does not rule out either the presence or absence of mineral resources. The project site is currently designated as MRZ-3 by California Division of Mines and Geology mineral resources maps. The project site is considered an area of undetermined mineral resource significance. Therefore, the proposed project would not result in the loss of availability of a known mineral resource that would be of value to the region and the residents of the state. Additionally, the City of Diamond Bar general plan does not identify any locally -important mineral resource recovery sites. No impacts are anticipated. XL NOISE—Would the project result in: a) Exposure of persons to or generation of noise levels in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies? b) Exposure of persons to or generation of excessive groundborne vibration or groundborne noise levels? c) A substantial permanent increase in ambient noise levels in the project vicinity above levels existing without the project? d) A substantial temporary or periodic increase in ambient noise levels in the project vicinity above levels existing without the project? Less than Significant Impact. Community Noise Equivalent Level (CNEL) is a description of the noise levels that occur over a 24-hour period. CNEL is the sound level, in decibels (dB) usually measured with an A -weighting scale and denoted as dBA, that corresponds to the average energy content of sounds (or noise) measured over a 24-hour period. Certain periods within the 24-hour cycle are weighted to account for the sensitivities of humans to noise events in the evening hours: a 5 dB weighting is assigned for the period of 7 p.m. to 10 p.m. and a 10 dB weighting is assigned for noises that occur during the period 10 p.m. to 7 a.m. The City of Diamond Bar noise ordinance requires that noise levels in the exterior areas of single-family residences not exceed 50 CNEL from the hours of 7 a.m. to 10 p.m., and 45 CNEL from 10 p.m. to 7 p.m. The ordinance also requires that interior noise levels for single-family residences not exceed 40 CNEL. Where the ambient noise level is higher than the measured noise condition, the ambient becomes the relevant standard. Short-term Noise Impacts Short-term construction -related noise would be generated by site grading, excavation, and associated construction activities. The level of noise generated by construction activities is based upon the type of equipment, the number of each type of equipment, the time of day the equipment is used, and the percentage of the day each activity occurs. Noise generated by construction equipment and construction activities can reach high levels, ranging from 88 to 105 dBA depending on the type of equipment being used. Pile driving noise levels are the highest noise levels associated with construction. However, this project will not employ pile driving. Grading activities generally have the next highest levels of noise associated with them. At 50 feet, grading activities commonly have average noise levels (e.g., Leq noise levels) of 85 dBA with maximum noise levels as high as 95 dBA. General building construction is considered to be C:Vocumenrs and Senings,,Rmoe wy DocumentslLibraryNEg DEC_doc 5-14 tnitW Study/Mifigafed Negative Declaration quieter than grading operations. The same peak noise levels are often reached d iring general construction as during grading, but the average noise levels are 5 to 10 dBA less. There are residential uses to the east, south and west of the project site, nd these ses are considered sensitive noise receptors. These sensitive receptors cc uld potentially experience noise levels during project grading that would exceed the City's roise standards, depending on their distance from the operating equipment. The cl sest existing residences are located approximately 500 feet from the proposec grading I mits and are therefore not expected to be subjected to noise levels as high 85 to 95 dBA during construction. Nevertheless, residents in the areas adjacent to t e project site may be subjected to noise levels during construction which could exceed t e City's ise standards, which would be considered a significant impact prior to mitigati n. The most effective method of controlling construction noise is through local control of construction hours. The City of Diamond Bar Noise Ordinance d es not allow construction activities between the hours of 7.00 p.m. and 7:00 a.m. on Weekdays and Saturdays, or at any time on Sunday or a Federal holiday, and exempts constru ion activities occurring at other times (i.e., during daytime hours) from the nc ise ordin nce threshold. Compliance with the noise ordinance is required as a condition af issuan a of grading permits and would therefore reduce potential short-term noise impacts to a I vel considered less than significant. Long-term Noise Impacts The proposed project would be located within the approvedCommunity/ enior C ter site and would not result in a significant increase in evening ambient nois levels for the residents to the east of the project site. The noise generated by proposed uses would be associated with patrons of the facilities walking to and from their vehic es and tr, ffic noise from vehicles entering the site. These noise sources are not expected to exceed the noise standards outlined in the City's noise ordinance. The traffic generated by the project has the potential to increase noise lev Is on vic nity roadways. The daily traffic volumes with the project on Grand Avenue in be vicini of the project site would be approximately 480 vehicles. Noise levels in adjacent home on Summit Ridge Drive are not expected to exceed City standards. Therefor), the pr ect would not cause long-term traffic -related noise impacts. Short-term noise impacts would be reduced to a level considered less th n signifiant with implementation of the mitigation program. e) For a project located within an airport land use plan or, where such a plan has been adopted, within two miles of a public airport or public 'use airpoll, would project expose people residing or working in the project area to excessive n( levels? f) For a project within the vicinity of a private airstrip, would the pr ject exp people residing or working in the project area to excessive noise levelt? No Impact. The proposed project is not located within an airport land use Ian or the vicinity of a private airstrip. No impacts are anticipated. C"1Doc rnenis and SettingsWnDes\My DocuTmmSVjbraryNEg 0M.dpc 5-15 Initial Study/Mifigated Summit Ridge library MITIGATION PROGRAM MM 11-1 The City of Diamond Bar has adopted a Noise Ordinance which specifies that outdoor construction activities shall not take place between the hours of 7:00 p.m. and 7:00 a.m. on weekdays and Saturdays, or at any time on Sunday or a Federal Holiday. These time restrictions shall be included on the contractor specifications and shall be verified by the Building Official. J11 MM 11-2 All construction vehicles or equipment, fixed or mobile, shall be equipped with properly operating and maintained mufflers. This requirement shall be shall be included on the contractor specifications and shall be verified by the Building Official. MM 11-3 Stockpiling and/or vehicle staging areas shall be located onsite and as far as practical from sensitive noise receptors, i.e., residential areas. This requirement shall be shall be included on the contractor specifications and shall be verified by the Building Official. XII. POPULATION AND HOUSING -Would the project: a) induce substantial population growth in an area, either directly (for example, by proposing new homes and businesses) or indirectly (for example, through the extension of roads or other infrastructure)? b) Displace substantial numbers of existing housing, necessitating the construction of replacement housing elsewhere? c) Displace substantial numbers of people, necessitating the construction of replacement housing elsewhere? No Impact. The proposed project does not involve the construction of new homes, businesses, or other growth -inducing infrastructure. The project will introduce a new (minor) source of employment. Furthermore, short-term construction and long-term operational employment are expected to be filled by the local labor pool. The project site does not contain habitable structures nor would it displace existing housing or people. No impacts are anticipated. Xlll. PUBLIC SERVICES a) Would the project result in substantial adverse physical impacts associated with the provision of new or physically altered government facilities, need for new or physically altered government facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times, or other performance objectives for any of the public services: Fire protection? Police protection? Less than Significant Impact Fre and police services in the City of Diamond Bar are provided by the County of Los Angeles Fire and Sheriff Departments (LAFD and LASD)_ Although the project would result in an increased demand for fire and emergency services and police protection at the project site, these increases would be nominal and would not affect existing service ratios. Therefore, the proposed project is not expected to result in a need for additional officers, equipment, or facilities. No mitigation is required. CADo ments and settings\,hn Des\MY DawavMtSXUbrAfYNE9 DEC.dac 5-16 Initiar Study/Mitigated Negative Declaration 1 1 1 Schools? Parks? Other public facilities? No Impact. The proposed project would not result in the need for adc park capacity. The project would not result in population growth which increase the burden on such public facilities. Additionally, the project public library for use by the residents of the City. No impacts are anticip XIV. RECREATION: a) Would the project increase the use of existing neighborhood and or other recreational facilities such that substantial physical dete facility would occur or be accelerated? b) Does the project include recreational facilities or require the a expansion of recreational facilities which might have an adverse on the environment? No Impact. The proposed project would not result in population growth which otherwise increase the burden on park and/or other recreational facilities No it are anticipated. The proposed project does not include recreational faciii ies or r the construction or expansion of recreational facilities. No impacts would result mitigation is required. XV.TRANSPORTATION/TRAFFIC—Would the project: a) Cause an increase in traffic which is substantial in relation to the a isti load and capacity of the street system (i.e., result in a substantial in either the number of vehicle trips, the volume to capacity ratio n congestion at intersections)? b) Exceed, either individually or cumulatively, a level of service standarg es by the county congestion management agency for designated roads or hi or We a the or Ii ire no In or Less than Significant Impact The proposed project is located on the north side of Grand Avenue west of Summitridge Drive. Upon project completion, the primary vehicular access point to the project will be from a driveway on Grand Avenue opposite the private roadway Shotgun Lane. A secondary access is currently provided via Summitridge Drive. An Intersection Capacity Utilization (ICU) analysis was conducted by Warran C. Sie ke (December 2001) to evaluate the traffic operating conditions at the intersection of Grand Avenue at Diamond Bar Boulevard and Grand Avenue at Summitridge Orl ve. The traffic analysis considered development of the Community/Senior Center project as well as a library. The study intersections were selected for evaluation because they, re close to the project site and most likely to be impacted by activities at thE project s te. By calculating ICU's for these intersections the operating conditions which E re define in terms of Level of Service (LOS) A, B, C, D, E or F can be determined. LOS is descrit ed as a value, which is associated with vehicle delay times (in seconds), here "A' is considered a free-flow condition (i.e., an average delay of less than 10�econds er vehicle) and "F" is beyond capacity (i.e., an average delay of more than 80 econds er CADoou,nents and Seffings,AmDesWy Dooumerdsl jbraryNEg [)r:C.doc 5-17 Initial Study/Mitigated Summit Ridge Library vehicle). Using these criteria, the existing intersection capacity utilization and operating conditions were determined. The results of the analysis are presented in Table 1. TABLE '1 EXISTING INTERSECTION CAPACITY UTILIZATION Traffic volumes generated by the proposed project were calculated using generation rates in the Trip Generation Manual, 6th Edition published by the Institute of Transportation Engineers (i.e., Land Use Code 495, Recreational Community Center). Using the ITE generation rates, the traffic volumes entering and leaving the site were projected. It should be noted that a significant portion of the traffic generated by library uses is "passby". In other words, patrons of the library are expected to combine their visit with other trips, such as shopping. The traffic generated by the library as identified in this section is the "new traffic" (trips that are not already being generated by other land uses). Project- related traffic volumes were added to the existing intersection capacity utilization values for Grand Avenue and Diamond Bar Boulevard, and Grand Avenue and Summit Ridge Drive in order to determine the project impact. The projected traffic volumes for the proposed library project are presented in Table 2. A summary of intersection capacity utilization impacts is presented in Table 3. Note that the ICU values included in Table 3 include traffic generated by the Community/Senior Center project which has already been approved and is under construction. TABLE 2 PROPOSED LIBRARY FORECAST TRAFFIC VOLUMES Daily Trips AM PeakFi9ur°,"Crips' FM Psak {lour Tres . inbound`.` `.Outbound lnboitnd Outboan i 480 7 3 24 24 C:Oocuments and SeUingsUmDeSWly D.nnentsUbraryNE9 DECAOC 5-18 inigai Stuuy1mitigatea nregarive TABLE 3 SUMMARY OF INTERSECTION CAPACITY UTILIZATION IMPACTS AM'Peak'Hour PM Peak Hour Intersection ICU LOS ICU LOS Grand Avenue & Diamond Bar Boulevard Existing 0.956 E 1.301 F Existing + Project 0.959 E 1.307 F Difference 0.003 .0-006 Grand Avenue & Summitridge Drive Existing 0.991 E 0-764 C Existing + Project 0.993 E 0.767 C Difference 0.002 0.003 The proposed library project is estimated to generate an additional 480 daily trips to and from the project site. Project related traffic would result in changes in ICU that are less than 0.007 (0-7 percent) during peak hours and would not result in a significant impact to intersections in the project vicinity. An ICU increase of 0.01 or morE is gene ally considered significant. The intersection of Grand Avenue and Diamond Ba Bouleva is currently operating beyond capacity and is impacted in the exists g Condit on. Nonetheless, the proposed library project's contribution is de minimis a d would not discernibly impact traffic at this intersection. No significant impacts are anti ipated. Although not required as mitigation, the traffic report recommends that Grand A Drive west of the intersection with Summitridge Drive be modified to remova the e; raised median, and that the roadway be restriped, and reconfigured to provide a r of ingress/ egress to the park for both directions of traffic on Grand Avenue. improvement has been designed by the City. Construction of the public iproves are anticipated to commence in September 2003. c) Result in a change in air traffic patterns, including either an increase in traffic levels or change in location that results in substantial safety risks? d) Substantially increase hazards due to a design feature (e.g., sharp curves or dangerous intersections) or incompatible uses (e.g., farm equipment)? e) Result in inadequate emergency access? f) Result in inadequate parking capacity? g) Conflict with adopted policies, plans, or programs supporting alterna ve transportation (e.g., bus turnouts, bicycle racks)? No Impact. The proposed project would not affect air traffic patterns, or woul it increase hazards due to design. The project includes two access roads the eby allow g adequate emergency access. Within the entire Community/Senior Center development site, 350 parking spaces wotild be provided; 81 would be immediately adjacent to the library. The parking available at the site would be sufficient to accommodate the proposed library uses, and no parks g impacts would result. The project library project would not conflict with adopted City policies, plans, or programs supporting alternative transportation. No mitigation is required. CADDcuments and SettingsVJmDeMy Dpcuments\UbrarVNF=g DEC.doc 5-19 Initlaf Study/Mitigated N five Deetara on Summit Ridge Library XVI. UTILITIES AND SERVICE SYSTEMS—Would the project: a) Exceed wastewater treatment requirements of the applicable Regional Water Quality Control Board? b) Require or result in the construction of new water or wastewater treatment facilities or expansion of existing facilities, the construction of which could cause significant environmental effects? c) Require or result in the construction of new storm water drainage facilities or expansion of existing facilities, the construction of which could cause significant environmental effects? d) Have sufficient water supplies available to serve the project from existing entitlements and resources, or are new or expanded entitlements needed? e) Result in a determination by the wastewater treatment provider which serves or may serve the project that it has inadequate capacity to serve the project's projected demand in addition to the provider's existing commitments? Less than Significant Impact. Wastewater service in the City of Diamond Bar is currently provided by the County of Los Angeles Sanitation District. Wastewater generated in the City is conveyed to the San Jose Creek Water Reclamation Plant in the City of Whittier. Restroom facilities associated with the proposed project would generate a negligible amount of wastewater and would not result in the exceedence of wastewater treatment requirements, construction of new or expanded wastewater treatment facilities, or result in a determination by the County of Los Angeles Sanitation District that it has inadequate capacity to serve the project's demand in addition to existing commitments. No significant impacts are anticipated. As discussed in Section 8, Hydrology and Water Quality, the proposed project would not substantially alter the existing drainage pattern of the project site. The project would require the construction of stormwater conveyance infrastructure on the project site, including catch -basins, gunnite bench drains, and rip -rap dissipaters. Significant impacts associated with the construction of devices are not expected to occur. Furthermore, they project would not add appreciably to flows entering storm drains in Softwind Drive and Summit Ridge Drive. No significant impacts are anticipated. The Walnut Valley Water District (WVWD) would provide domestic water service to the proposed project. The WVWD is supplied by the Three Valleys Municipal Water District (TVMW D) and the Metropolitan Water District (MWD) of Southern California. Current water supplies and infrastructure would be adequate to serve the proposed project, particularly given the negligible water usage expected of the proposed library facilities. Water use on the project site would consist primarily of landscape irrigation (which is not expected to exceed the water usage for existing park landscaping) and restrooms. No significant impacts are anticipated. f) Be served by a landfill with sufficient project's solid waste disposal needs? g) Comply with federal, state, and local waste? permitted capacity to accommodate the statutes and regulations related to solid No Impact. The proposed project would be served by the County of Los Angeles Sanitation District for solid waste disposal. Solid waste would be transferred to the Puente Hills Landfill #6 located in the City of Whittier. The landfill is permitted to accept CADocumenis and SeWngsLRmDasMAy Documen SUtraryNE9 DE•d0c 5-20 Initial Study/Mitigated Negative Declaration C] 1 SECTION 6 — REPORT PREPARERS AND CONTRIBUTORS LEAD AGENCY Deputy City Manager................................................................................ Jan ies DeStefano DeputyCity Manager........................................................................................ David I oyle Director of Public Works....................................................................................... David Liu AssociatePlanner........................................................................................ ...Ann Ltingu BONTERRA CONSULTING Project Manager........................................................................Thomas E. S ith, Jr.,ICP Environmental Analysis......................................................................Christi a L. Ande sen CM)Ocuments and seningsUmoesftDoa,memstiSm yNr=g oEc.doc &I Initial Study/Miigated Summit Ridge Library SECTION 7 — REFERENCES California Integrated Waste Management Board. Solid Waste Information System (SW1S). www.ciwmb.ca.gov/SWIS/ City of Diamond Bar. July 1995. General Plan. City of Diamond Bar. November 1998. Development Code. City of Diamond Bar. February 2002. Mitigated Negative Declaration for Summit Ridge Community/Senior Center. Department of Mines and Geology. 2000. Seismic Hazards Maps - Yorba Linda Quadrangle. Hunsaker & Associates. January 2002- Storm Water Pollution Prevention Plan for the Community Center in the City of Diamond Bar. Leighton & Associates. December 2001. Preliminary Geotechnical Investigation for the Proposed Community Center at Summitridge Park. Leighton & Associates. January 2002. Addendum to Geotechnical Investigation for the Proposed Community Center at Summitridge Park. Siecke, Warren. 2002. Traffic Analysis for the Summitridge Community/Senior Center Southern California Air Quality Management District. 1999. CEQA Handbook. US Environmental Protection Agency. 2000. Watershed Assessment Database www.epa.gov/sutf3fstates/CA Warren C. Seike. December 4, 2001. Letter Report from Warren C. Seiki to Mr. David Liu, Director of Public Works, City of Diamond Bar addressing traffic impact analysis for the Community/Senior Center and Library Project. G:Oocuments and SedingslfimDesWly DocumentsUbraryNE9 DMdoC 7-4 Initial Study/Mitigated NegOve Dedaralion I� 1 1 SECTION 8 — DETERMINATION After completion of the pubic review period for the Summit Ridge Lib Initial Study and Proposed Mitigated Declaration, the following dete appropriate: I find that although the proposed project could have a significant effect on the environment, there will not be a significant effect in this case because the mitigation measures listed wit in this Initial Study have been added to the project. A MITIGATED NEGATIVE DECLARATION is the appropriate environ ental document. Signature: Printed Name: James DeSte ano Agency: City of Diamond. Bar Date: September 12, 2003 SECTION,q - RESPONSE TO COMMENTS 712177, =1377124!�' DEPARTMENT OF TRANSPORTATION DISTRICT , FGIONAL PLANNING , I T ' 3 BA TGR/CEQA BRANCH C `r.. L N G. 120 S. SPICING STREW t ANGELES, CA 90012 ?f?`13 AUG 21 PFI 2: 4 � NE (213) 897-4429 (213) 897-1337 J Dear Mr. DeStefano: Thank you for including the Caaifornia Department of Transportation in the environmental re for the above-mentioned project. Based on the information received, we have the following We recommend that construction related truck trips on State highways be limited to commute periods. Otherwise, we have no comments. If you have any questions regarding our response, refer to our internal IGR/CEQA Record #, please do not hesitate to contact me at (213) 897-4429. Sincerely, STEPHEN BUSWELI, IGIt/CEQA Branch Chief cc: Mr- Scott Morgan, State Clearinghouse Cshrsas,improges mohiliEpscmas Celitoxdie" Be 10 process yourpowert August 19, 2003 IGR/CEQA cs/03084 NEG DEC City of Diamond Bar Summit Ridge Librax Grand Ave./Summit I Vic. LA -57-1.78 Mr. James DeStefano SCH # 2003081055 Deputy City Manages. City of Diamond Bar 21825 E. Copley Drive Diamond Bar, California 91765 Dear Mr. DeStefano: Thank you for including the Caaifornia Department of Transportation in the environmental re for the above-mentioned project. Based on the information received, we have the following We recommend that construction related truck trips on State highways be limited to commute periods. Otherwise, we have no comments. If you have any questions regarding our response, refer to our internal IGR/CEQA Record #, please do not hesitate to contact me at (213) 897-4429. Sincerely, STEPHEN BUSWELI, IGIt/CEQA Branch Chief cc: Mr- Scott Morgan, State Clearinghouse Cshrsas,improges mohiliEpscmas Celitoxdie" Be 10 process yourpowert WATER RECLAMATION SOUR WASTE YANADEMENT P" u COUNTY SANITATION DISTRICTS OF LOS ANGELES COUNTY 1955 Workman Mill Road, Whittier, CA 90601-1400 Mailing Address: P.O. Box 4998, Whittier, CA 90607-4998 Telephone: (562) 699-7411, FAX: (562) 699-5422 www.locsd.org i Mr. James DeStefano Deputy City Manager City of Diamoni d Bar 21825 East Copley Drive Diamond Bar, CA 91765-4178 Dear Mr. DeStefano: August 19, 2003 File No: 21-00.04-00 JAMES F. STAHL Chief Engineer and General Manager Summit Ridge Librax The County Sanitation Districts of Los Angeles County (Districts) received an Initial Study/Mitigated Negative Declaration for the subject project on August 8, 2003. The proposed development is located within the jurisdictional boundaries of District No. 21. We offer the following comments regarding sewerage service: • Previous comments submitted by the Districts in correspondence dated November 14, 2002 (copy enclosed), to your agency, still apply to the subject project with the following updated information. • The San Jose Creek Water Reclamation Plant currently processes an average'flow of 88.6 million gallons per day. • The expected average wastewater flow from the project site is 6,000 gallons per day. If you have any questions, please contact the undersigned at (562) -699-7411, extension 2717. Very truly yours, James F. Stahl Ruth 1. Frazen Engineering Technician Planning & Property Management Section RIF:eg - -- Enclosure 267937.1 i w �J Recycled Paper 1 1 SOUTHERN CALIFORNIA EDISON-' An EDISON 1NTEX1tiATiovALT C0mpam September 5, 2003 Mr. James DeStefano Deputy City Manager City of Diamond Bar 21825 E. Copley Drive Diamond Bar, CA 91765 SUBJECT: Dear Mr. DeStefano: W This is to advise that the subject property is located within the service territory Southern California Edison Company (SCE) and that the electrical loads of the within parameters of projected load growth which SCE is planning to meet in t Our total system demand is expected to continue to increase annually; however excluding any unforeseen problems, our plans for new distribution resources in our ability to serve all customers' loads in accordance with our rules and tariffs adequate during the decade of the 2000's. Current conservation efforts on the part of SCE customers have resulted in ener savings. Optimization of conservation measures in this project will contribute t overall energy savings goal. If you have any additional questions, please feel free to call me at (909) 592-37: cc Jeff Burt — SCE Mary Dolmatoff— SCE 800 W. Cienega Avenue San Dimas, CA 91773 909-592-3758 800-350-3717 Fax 909-592-3723 Richard.Meza@sce.com Sincerely, area. e that be the WALNUT VALLEY WATER DISTRICT BOARD OF DIRECTORS 271 South Brea Canyon Road - P.O. Box 508 Walnut, California 91789-3002 • (909) 595-1268 - (626) 964-6551 Keith K. Gunn Website: www.wvwd.com • Pax: (909) 594-9532 President Election Division V Edward N. Layton Vice Friesident Election Division NI William G. Wentworth Vice President Election Division I Edwin M. Hilden Assistant Treasurer Election Division II Donald L. Nettles Director Election Division IV STAFF: Karen J. Powers General Manager Secretary / Treasurer LEGAL COUNSEL: H. Jess Senecal September 9, 2003 Mr. James DeStefano, Deputy City Manager City of Diamond Bar 21825 E. Copley Dr. Diamond Bar, CA 91765 RE: Summit Ridge Library Dear Mr. DeStefano: O G}, 9 caC.0 Ln The Walnut Valley Water District (District) has reviewed the Initial Study/Mitigated Negative Declaration for the subject project with respect to the impact that would potentially affect the District's facilities. As a reminder, when the metered services were designed and installed for the Community Center, additional services were not added for the library's use, due to unknown demands. Therefore, it will be necessary to prepare an application for service and provide demand information once the final building facility design has been approved. Please contact me at Ext. 234, or Mr. Erik Hitchman at Ext. 244, if you have any questions or need any additional information. Very truly yours, WALNUT VALLEY WATER DISTRICT W Gr'5zs- Sheryl L. Shaw, P.E. . Engineering and Planning Manager SLS:gb �W Lse�ve�Er<7ineermp�GaleBLat,ertyB�DBL.ipNOrevdoe SECTION 10 - MITIGATION MONITORING PROGRAM D MITIGATION MONITORING PROGRAM - SUMMIT RIDGE LIBRARY PROJECT ND 2003-04 State Clearinghouse Number: 2003081055 Prepared for.- The or:The City of Diamond Bar 21825 E. Copley Drive Diamond Bar, CA 91765 Contact: Mr. James DeStetano Deputy City Manager Prepared by: BonTerra Consulting 151 Kalmus Drive, Suite E-200 Costa Mesa, California 92626 And the City of Diamond Bar Contact: Mr. Thomas E. Smith, Jr., AICP September 12, 2003 1 Summit Ridge Library Project Mitigation Monitoring Program Introduction The Section 21081.6 of the State of California Public Resources Code requ Responsible Agency that approves or carries out a project where a Mit Declaration (MND) has identified potential significant effects to adopt a "reporti program for adopted or required changes to mitigate or avoid significant environ An MND has been prepared for the construction of the Summit Ridge Libra addresses the potential environmental impacts, and where appropriate, recomr to mitigate these impacts. The MND was circulated for a 30 -day public reA August 8, 2003 to September 8, 2003. The City of Diamond Bar, as lead implementation of the Summit Ridge Library Project, is responsible for implei mitigation monitoring program (MMP). Proiect Description The Summit Ridge Library Project consists of the construction of a new librar City of Diamond Bar. The library would be comprised of approximately 30,000 project would be constructed on an existing approximately 0.8 -acre site within i portion of the existing 17 -acre Summit Ridge Park, adjacent to and west of tt Senior Center which is currently under construction. Access to the site will Avenue. Facilities that would be provided at the library include, but would not be limited book stacks and seating, reference collection, f=riends of the Library Bookstore, study and meeting rooms, lounge area, lobby/checkout/registration area, display, children's library area, offices, communication room and homework cel would be constructed in one phase. Library occupancy is projected for first qua Responsibilities The MMP for the Summit Ridge Library Project will be in project or until all mitigation measures are implemented. primary agency responsible for verifying compliance with the table below. k%negdec2003report.doc place through cor The City of Diarr mitigation measu Mitigation Ridge a Ld or ted N ative or mon toring ntal eff cts." Project sures from the f the building n the uare feet The _. northwestern Community & Fe from Grand the foil ing: nputer e real, ural/hist Drical Thep oject of 2006 ction the Bar11i the listed the FE �a UIX 3 0 00 aaQ 0 M Z N � = Cm - r O G1 Q WE 0� a �ON �a H cn 5 a) o e V W C] w E Y E E.2 Em m Z G G C W C O C C C (0 O.a p 7 n� n41 ° a na G ° o 7 0 CL <D C E— ri °► Edo ERZ E o ERZ E o� E? -a`� Epi! 00)a) U0co aa)07 UCCA D0) m=7ad 0❑U1 0 0) 00cno[d 0 L N N° O 11E y G 07 _$ r° [O W C C O C rC c0 C3 C .0 E 'O .E O! 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