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HomeMy WebLinkAboutRES 2002-78RESOLUTION NO. 200248 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF DIAMOND BAR APPROVING A MITIGATED NEGATIVE DECLARATION AND MITIGATION MONITORING PROGRAM (ND 2002-08) FOR THE SUMMITRIDGE LIBRARY PROJECT A. RECITALS. (i) The City of Diamond Bar proposes development of a 25,000 square foot Library upon a site comprised of approximately 0.8 -- acne within the northern portion of the existing 17.3 acre Summitridge Park located at the northwest corner of Grand Avenue and Summitridge Drive the "Project" hereinafter.) (ii) In accordance with the provisions of the California Environmental Quality Act, Public Resources Code Sections 21000 es, saq. ("CEQA"), the S ate CEQA Guidelines, California Code u► Regulations, Title 14, Sections 15000 et. Seq., the U&,, prPp,ared an Initial Study aid Mitigated Negative Declaration (ND 2002-08) dated November 5, 2002, Ithe "IS/MND") and Mitigation Monitoring Plan ("MMP") to analyze proposed Project. the (iii) On November 6, 2002, in accordance with CEQA' Guidelines Section 15072, a Notice of Availability and Intent to Adopt; a Mitigated Negative Declaration was published within the Inland Valley Daily Bulletin and the San Gabriel Valley Daily Tribune. In addition, on Novembet 6, 2002, copies of the Notice were posted on-site and displayed Off-SitE at seven public locations within the City of Diamond Bar. Approximately A26 owners of property located within 1,000 feet of the Project were mailed the Notice. (iv) A public review period for the proposed MND was provided from November 6, 2002, through November 26, 2002. Copies of the propo ed IS/MND were made available for public review at the Diamond': Bar Library and at City Hall. (v) LJ In accordance with CEQA Guidelines, the IS/MND was circulated to interested parties and agencies for public comment. In response to the circulation of the IS/MND, the City received written and oral Comments regarding the adequacy of the IS/MND. The City caused preparation of written responses where required to all comments which raised proj ct related environmental issues. The City has incorporated the comme is and responses into the MND where appropriate. 2002-178 (vi) On December 3, 2002, the City Council held a duly noticed public meeting on the IS/MND. At the meeting, interested parties were provided an opportunity to present oral and written comments regarding the IS/MND. On December 3, 2002, the City Council concluded the public meeting. B. RESOLUTION. NOW, THEREFORE, it .is hereby found, determined and resolved by the City Council of the City of Diamond Bar, as follows: 1 . The City Council hereby specifically finds that all of the facts set forth in the Recitals, Part A, of this Resolution are true and correct. 2. The City Council 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; that said 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 3RD DAY OF DECEMBER, 2002. t Carol Herrera , MAYOR 0) 2002-78 1 D 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 Co ncil of the City of Diamond Bar held on 3rd day of December, 2002. AYES: COUNCIL MEMBERS: Chang, O' Connor, zirbec M/Herrera NOES: COUNCIL MEMBERS: None ABSENT: COUNCIL MEMBERS: None ABSTAIN: COUNCIL MEMBERS: None ATTEST: LyInaa Burgess, City Clerk City of Diamond Bar 3 ,1, MPT/Duff, 2go2-7s 1 Fxk4lBtr 11/41, Novem ber 20 , 1 1 Wen P. Chang 'vtavor .ah H_ O'Connor Mayoi Pro Tem Carol Herrera Council Member Robert S. Huff Council .Vember Robert P. Zirbes Council rUember J City of Diamond Bar 21825 E. Copley Drive - Diamond Bar, CA 9j765-4178 (909) 860-2489 - Fax (909) 861-311 i www-GtyofDiamondBar.com NOTICE Or= AVAILABILITY AND INTENT j TO ADOPT A MITIGATED NEGATIVE DECLARATION In accordance to Section 15072 of the State of California Environmental 041ity Act this notice is intended to inform the general public and City residents that the Pity of L proposes to adopt a Mitigated Negative Declaration for the following projecil: Project Title: Summit Ridge Library Project Description: The proposed project consists of the construction of in the City of Diamond Bar. The library would be a square feet in size. The project would be construct 0.8 acre site within the northwestern portion of t Summit Ridge Park, adjacent to and west of the approved Community/Senior Center which is currently under construction. Access s to the site would be from Grand Avenue and Summit Ridge Drive. Project Location: The proposed project would be I located within Summit Ridge Park on Z the northwestern corner of Grand Avenue and Summit Ridge Drive in `" d the City of Diamond Bar, Los Angeles County, California. Review Period: November 6 to November 26, 2002 Lead Agency: City of Diamond Bar Adoption Date: The Diamond Bar City Council is scheduled to can: Mitigated Negative Declaration at a public meeting on at 6:30 p.m. Public Meeting South Coast Air Quality Management District/ Location: Government Center Auditorium 21865 E. Copley Drive Diamond Bar, CA 91765 Contact Person: ,lames DeStefano Deputy City Manager City of Diamond Bar 21825 East Copley Drive Diamond Bar, California 91765-4177 Phone No.: (909) 396-5676 Fax No.: (909) 861-3117 The Mitigated Negative Declaration and Initial Study will be available for pub City of Diamond Bar City Hall and at the Diamond Bar Public Library located Avenue, Diamond Bar, CA. Bar new librarA building rroximatel 25,000 on an apr ximate existing P 7 -acre and review at 1061 Gra Please submit any comments on the Mitigated Negative Declaration to thabo a listed e person on or before November 26, 2002. If you have any questions or woul like ac information, please contact Mr. DeStefano. rpt the 2002, Ll LIST OF TABLES Table No. 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 Exhibit Follows 1 Regional Location Map2-2 2 Local Vicinity Map ......................... ............ 2-2 3 Site Plan ....................................... 3-1 4 Building Elevations ..................... . .. ....... 3-1 5 Site Photographs .... ........ . ............ . ........... 5-2 RAPro1ecMTBarU010u5 MND-110502.wpd TABLE OF CONTENTS Section P. age 1. INTRODUCTION ..................... . ... . .. . .... 1-1 1.1 Purpose of the Initial Study ...................................... 1-1 1.2 Summary of Findings .. . ................... . 1.3 Project Approval Process .... I.......... .................. 1.4 Organization of the Initial Study ........ . ............... . ... ... 1-1 1-2 . .......... 2. PROJECT LOCATION AND ENVIRONMENTAL SETTING ......... i......... i 2-1 2.1 Project Location ................................ 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 ............... ........................... ...... 7-1 Ll LIST OF TABLES Table No. 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 Exhibit Follows 1 Regional Location Map2-2 2 Local Vicinity Map ......................... ............ 2-2 3 Site Plan ....................................... 3-1 4 Building Elevations ..................... . .. ....... 3-1 5 Site Photographs .... ........ . ............ . ........... 5-2 RAPro1ecMTBarU010u5 MND-110502.wpd SECTION 9 -- INTRODUCTION 1.1 PURPOSE OF THE INITIAL STUDY The purpose of this Initial Study (IS) is to describe the proposed Summit Ridge Library pr jest, hereafter referred to as the proposed project, and provide an evaluation ol the pOtE ntial environmental effects associated with the project's construction and use. This IS has been prepared pursuant to the California Environmental Quality Act (CEQA), as amended (P blic Resources Code §21000 et seq.), and in accordance with the State CEQA Guidelines (Calif mia Code of Regulations, Title 14, §15000 et seq.). Pursuant to Section 15357 of the State CEQA Guidelines, the City of Diamondar is the lead agency for the project. The lead agency is the public agency that has the princip I responsi ility for carrying out or approving a project that may have a significant effect upon the Onvironm nt. 1.2 SUMMARY OF FINDINGS Based on the environmental checklist form prepared for the project and supportingenvironrr analysis, the proposed construction of the proposed project would have no impa t or less significant impacts in the following environmental impact areas: • Agricultural Resources • Hazards and Hazardous Materials • Hydrology and Water Quality • Population and Housing • Land Use and Planning • Biological Resources • Noise • Mineral Resources • Public Services • Recreation • Transportation/Traffic • Utilities and Service S • Cultural Resources • Geology & Soils The IS identifies potentially significant effects on the environment in the following impact areas: • Aesthetics • Air Quality Revisions to the project plans made by or agreed to by the City of Diamond Bar before the proposed IS and Negative Declaration were released for public review would avoid the effecl S or mitigate the effects to a point where clearly no significant impacts on the environment would occur. Pursuant to Public Resources Code Section 21080(c)(2), a Mitigated Negative Declaration (MND) has been prepared. 1.3 PROJECT APPROVAL PROCESS This IS and proposed MND have been -submitted to potentially affected agencies arid individuals. Notices of Availability of the IS and MND for review and comment have been posted onsite an J at the Diamond Bar City Hall. Newspaper notices announcing the availability of the S/MND ere published in the Inland Valley Daily Bulletin and in the San Gabriel Tribune. Referen d documents are available for review at the City of Diamond Bar Community and Development Services Department. R:1ProjecWD8arU010U5 MND-110502.wpd 1-1 - - initial Summit Rid a Libraty A 20-day public review period has been established for the IS and proposed MND in accordance with Section 15073 of the CEQA guidelines. 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 environmental documentation is available for review at the following locations: Diamond Bar Public Library 1661 South Grand Avenue 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 is scheduled to be adopted by the Diamond Bar City Council on December 3, 2662. 1.4 ORGANIZATION OF THE INITIAL STUDY The IS is organized into the following sections: • Section 7 — Introduction. This section provides an introduction and overview describing the findings of the IS. • 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. • Section 3 — Project Description. This section provides a detailed description of the physical and operational characteristics of the proposed project. • 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. • 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. • Section 6— Report Preparers and Contributors. This section identifies those individuals responsible for preparing and contributing to the IS and proposed MND. RAPrafectsMaWO tOUS WINO -I I050z.wpd 1-2 initial Study/Mitigated Negative Declaration 1 1 • Section 7— References. This section identifies those references used in preparation of the 1S. The following sections will be added to the MND upon completion of the public review period: • Section 8 — Determination. A statement on the determination that a MND is the appropriate environmental documentation is included in this section. • Section 9 Responses to Comments. This section contains the comments th t were received during the public review period and the prepared responses to those com eats. • Section 107 Mitigation Monitoring Program. This section contains the Mitigation Monitoring Program prepared in compliance with Public Resources Cod 21081.6. R_Trog-lso3arUo1o1IS MND-110502.wpd 1-3 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 portior of the existing 17.3 acre Summit Ridge Park on the northwest comer of Grand Avenue a"d Summi Ridge Drive in the eastern portion of the City of Diamond Bar, Los Angeles County,', Califomi . The regional location and local vicinity of the project site are depicted in Exhibits 1 ani12, respe tively. Vehicular access to the project site would be provided from an existing entrance On Summil Ridge Drive and a revised entrance on Grand Avenue. 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 Ivenue and single-family estate homes, to the east by Summit Ridge Drive and single-faFnily homs, and to the north and west by vacant land. i 11 2.2 ENVIRONMENTAL SETTING The project site is within the existing 17.3 -acre Summit Ridge Park in the City of Dilmond Ba . The upper portion of the park is currently being graded for construction of the Communi�y/Senior Center building with associated parking, open space, and landscaped areas. The existir ig open to f play areas and baseball diamond are being retained; however, public access is being estricted i Juring the grading for the Community/Senior Center. These facilities will become available to theublic upon completion of grading in early 2003. The perimeter of the park is iandscap d primas y 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 site slopes downhill from north to south. Elevations Nithin the project site range from approximately 1,250 feet above mean sea level (m§l) to 1, 160 feet (msl). The following identifies the land uses surrounding the project site as well as �he goner l plan land use designations of surrounding areas. I Surrounding Land Uses: North: Vacant Land South. Rural Residential East.- 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 (m�ax. 3 Zoning Designations of Surrounding Areas: North: Residential Planned Development Zone (RPD) 1 du/10,000 ft2 South: Single Family Residential R-1) 1 du/40,000 square feet (ft) East: Residential Planned Development Zone (RPD) 1 du/10,000 ftz West: Single Family Residential R-1) 1 du/8,000 ftz P Pro1ects%D82N0'i0%1S MND-110502.wPd 2-1 Initial Study/Mitigated Negative Summit Ridge fibra 2.3 PROJECT OBJECTIVES A consultant team and task force was appointed by the Diamond Bar City Council in 7998 to make recommendations regarding the development of a Civic Center and community facilities to serve the residents of the City of Diamond Bar. The task force considered the development and content of six different types of community facilities during the process. Those facilities consisted of a City Hall, community center, library, performing arts center, senior center, and sports complex. The task force also recognized that many types of uses could be accommodated in more than one facility. With implementation of the proposed project, one of the previously mentioned facilities, a library, would be provided. A community center with a senior center and youth center were previously approved for the site and are currently under construction. The project objective is as follows: 7. To construct a library adjacent to the Summit Ridge Community/Senior Center site within Summit Ridge Park. RNPrgectSZ5arW010515 MND-110502—pd 2-2 Initial Study/Mitigated Negative Declaration 1.% Local Vicinity Flrasb" �•w flay Scan Ranch Summit Ridge Library Project 4- 0.25 0 0.25 0.5 Miles 1 75�- Project Location 11 r� Source: US Census Bureau ER 2040 Exhi it 2 C O N 5 U i T) N G S:1GiS_Exhibit DbarJ01a LV 10402.pdf 60 cdreoww Local Vicinity Flrasb" �•w flay Scan Ranch Summit Ridge Library Project 4- 0.25 0 0.25 0.5 Miles 1 75�- Project Location 11 r� Source: US Census Bureau ER 2040 Exhi it 2 C O N 5 U i T) N G S:1GiS_Exhibit DbarJ01a LV 10402.pdf 1� S Kern Ventura Eos Fad - National Forest .Angeles- Nagenxl-FOrear EdwardsAl, Farce lase Kern Los Angeles 0 .E L C \ Q) f� ru _ -A.pdk National Forest Ln 1 76 Project Los Location � Angeles mora t resin � � Regional Location Summit Ridge Library Project lU D t0 20 Miles Exhibit 1 Oh,5Ui71fVG 1010_RL 1 0402.pdf SECTION 3 — PROJECT DESCRIPTION 3.1 PROJECT APPROVALS REQUIRED This proposed IS/MND is intended to serve as the primary environmental document for all ctions 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 mitgation monitoring program for the proposed project. The anticipated discretionary approvals requi ed 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 from development and land use approval requirements. 3.2 PROJECT CHARACTERISTICS The project site consists of an approximate 0.8 -acre graded pad within the Sumkt Ridge Park. The proposed librarywould be located west of the Community/Senior Center (und r constru ion), on the site previously approved as an open space area. The library building would be an approximate 25,000 square -foot, single -story structure. 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 Bookstore, computer areas, study and meeting rooms, lounge area, lobby/checkout/registration area, culturallhistorical display, children's fibra area, offices, communication room and homework center. A maximum of 20 library staff would be on dutyat any given time to operate the facility. Parking to accommodate library users would also be provided. There would be 81 parking s aces provided adjacent to the library; however, there would be an additional 198 space adjacent to the Community/Senior Center that would also be available for library patrons. Access �o the site vould be provided from Summit Ridge Drive and 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, Atone, and earth toned concrete would be used to give a natural/classic expression. Native vege ation would be incorporated into the landscape plan. The proposed site plan and elevations (west and south) for the library building re presen ed in Exhibits 3 and 4, respectively. 3.3 PROJECT PHASING The proposed project would be constructed in one phase. The rough grading for the sit.- has already been initiated as part of the Community/Senior Center project. Finish grading for the I brary is projected to begin in fourth quarter 2003 or first quarter 2004; building construction would )egin immediately thereafter. Occupancy is projected for mid -2005. R,%Projec1s0SarU01011S MND-110502.wpd 3-1 Initial Ct:rrhr/A.f1K—f-4 Aln...-,+:.,., n.,..,.....: C 1 M C� a tia r y Xi LLI A � L liz C) q V � a IL N, N C N b O fl 4 m L 4 m m 0 m m U — 6 A 1 U O co !J r ^W ❑ 1 C LLI z V Vl O U 0 > Q) LIJ m � � m m CO L 1 i X y w z 0 U V) i O �r - i -J ` ru a _ > - e W W R C L mm O L'J �m C* fn Vj 1 1 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 pr posed project. The checklist identifies potential project effects using the following catego es: (9) Potentially Significant Impact; (2) Potentially Significant Unless Mitigation Incorporated; () Less Than Significant Impact; and, (4) No Impact. Substantiation and clarification fir each ci iecklist response is provided in Section 5 (Environmental Evaluation) as required by CgQA. Incl ided in each discussion are mitigation measures, as appropriate, that are recommend d for implementation of the Summit Ridge Library project. R vIrojectsWaru61ous MND -110502 -pd �.. _ Summit Ridge Library R:%Projects08arW10US MN6110502. pd 4-2 Initial Study/Mitigated Negative Declaration Less Than ENVIRONMENTAL ISSUES Potentially Significant Less Than (see attachments for information sources) Significant With Significant No Impact Mitigation Impact Impact !.."iSTllt--Wou a) Have a substantial adverse effect on a scenic vista? p ❑ ❑ M b) Substantially damage scenic resources, including, but ❑ ❑ ❑ ■ not limited to, trees, rock outcroppings, and historic buildin s within a state scenic hi hwa . c) Substantially degrade the existing visual character or ❑ p / ❑ quality 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? If�..AGF�iCllt:TtlRR�St�t3 ES.�� �`�[trtpa� ��ncu�l�=resources are s�grtt'rct�int " !ea ��vrrormentaeif ; � � � rr}ta,,��Pygt�aa�td Evalu�rer�ar� Sfte:, 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 6gency, to non -a ricultural use? b) Conflict with existing zoning for agricultural use, or a ❑ ❑ ❑ M Williamson Act contract? c) Involve other changes in the existing environment ❑ ❑ ❑ ■ which, due to their location or nature, could result in conversion of Farmland, to non-agricultural use? '4���i�' e?�%� ��5,X� !t! AIR YIJALlTY Wtite applicab� lite s�rance cna � "- esiabiishsd by#he3 applicable au gaaGly nr;arnerit or air pollution irdritroT.district m "" be.retieCl 'to f lake tl6 fo deferrriinaticns:'Wtuttdthe a) Conflict with or obstruct implementation of the ❑ ■ ❑ ❑ applicable air quali Ian? 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 p ❑ ❑ 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 ❑ ❑ ❑ E number of people? R:%Projects08arW10US MN6110502. pd 4-2 Initial Study/Mitigated Negative Declaration 1 1 Less Than ENVIRONMENTAL ISSUES Potentially Significant (see attachments for information sources) Significant With a) Have a substantial adverse effect, either directly or 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 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 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 nurseDL sites? ❑ ❑ I e) Conflict with any local policies or ordinances protecting biological resources, such as a tree preservation policy or ordinance? ❑ ❑ Q Conflict with the provisions of an adopted Habitat Conservation Plan, Natural Community Conservation Plan, or other approved local, regional, or state habitat conservation tan? ❑ ❑ C V. CULTURAL RESOURCES--Woukt the fo'eCt. s a) Cause a substantial adverse change in the significance of a historical resource as defined in §'15064.5? ❑ ❑ C b) Cause a substantial adverse change in the significance of an archaeological resource pursuant to §95064.5? ❑ ❑ ❑ c) Directly or indirectly destroy a unique paleontological resource or site or unique geological feature? p ❑ ❑ d) Disturb any human resources, including those interred outside of formal cemeteries? ❑ ❑ ❑ R:4ProjectsoBallo1o1i5 MND-110502,vMd 4-33 Than ificant No Pact ! pa El Negative ■ i ■ ■ Negative Summit Ridge library RIProjectsOBaNNOUs MNo-110502.wpd 4-4 Initial 5tudylMitigated Negative Declaration Less Than ENVIRONMENTAL ISSUES Potentially Significant Less Than (see attachments for information sources) Significant With Significant No Impact Mitigation Impact Impact ; , .,,a�,.`F x �.. 111 GEt]LOG1t"AND SDI ' the V" w •^ 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 recentAlquist-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? ivJ Landslides? ❑ ❑ ■ b) Result in a 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 or MEW e) Have soils incapable of adequately supporting the use ❑ ❑ ❑ ■ of septic tanks or alternative waste water disposal systems where sewers are not available for the disposal of waste water? VIl. I A2ARDS'AHD HATARDOUS MATEFOALS=Wotili 'itie` 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 ❑ ❑ ❑ M 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? d) Be located on a site which is included on a list of ❑ El ❑ 0 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? RIProjectsOBaNNOUs MNo-110502.wpd 4-4 Initial 5tudylMitigated Negative Declaration ■ No ipa ct ■ ■ ■ Less Than ENVIRONMENTAL ISSUES Potentially Significant Les$ Than (see attachments for information sources) Significant With Significant Impact Mitigation Impact 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 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, ❑ would the project result in a safety hazard for people ❑ p residing or working in the project area? g) Impair implementation of or physically interfere with an ❑ adopted emergency response plan or emergency evacuationplan? h) Expose people or structures to a significant risk of loss, 0 injury, or death involving wildland fires, including where ❑ wildlands are adjacent to urbanized areas or where residences are interm€xed with wildlands? VIED !#YE7EtC?L�ilf ' .� a) V€olate any water quaG#y standards or waste discharge re uirements? ❑ ❑ � b) Substantially deplete groundwater supe€les or interfere ❑ with groundwater recharge such #hatthere Elsubstantially 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 p site or area, including through the alteration of the ❑ 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 0 ❑ course of a stream or river, or substantially increase the rate or amount of surface runoff in a manner which would result in flooding onsite or offsite? e) Create or contribute runoff water which would exceed ❑ the capacity of existing or planned stormwa#er drainage El ❑ systems or provide substantial additional sources of ollutant runoff? f) Otherwise substantially degrade water quality? 0 ❑ ❑ g) Place housing within a 100-year flood hazard area as ❑ mapped on a federal Flood Hazard Boundary or Flood 0 Insurance Rate Map or other flood hazard delineation ma ? h) Place within a 100-year flood hazard area structures p which would im ede or redirect flood flows? ❑ ❑ R:IProffl=IDBarUolMl5 MND-110502.wpd 4-5 JnitialStudy/Mitigated Negative Di ■ No ipa ct ■ ■ ■ Summit Ridge library R %Projects%DBarUo1ol15 MND-110502.wpd 46 initial Study/Mitigated Negative Declaration Less Than ENVIRONMENTAL ISSUES Potentially Significant Less Than (see attachments for information sources) Significant With Significant No Impact Mitigation Impact Impact 1) Expose people or structures to a significant risk of loss, ❑ ❑ ❑ ■ injury, or death involving flooding, including flooding as a result of the failure of a levee or dam? j) Inundation by seiche, tsunami, or mudflow7 ❑ ❑ ❑ ■ `, ,7 �r/�" �{�� yj� ANQ.IPLA NiNtr-'V,i€:a�ld t17B .e., .•.`.JAS D USE �v-: M,,p; a� a) Physically divide an established community? ❑ ❑ ❑ ■ 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 ordinance) adopted for the purpose of avoiding or mitigating an environmental effect? c) Conflict with any applicable habitat conservation plan ❑ ❑ p ■ or natural Community conservationplan? - :.e ;.. .'MIIVdt . 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 resource recovery site delineated on a local general plan, s ecific RIan, or other land use tan? �a Xi. 1�OE5E�IVtu�tlte eat:'Cesultttt ��� 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 ❑ ❑ ■ ❑ roundbome vibration or roundbome noise levels? c) A substantial permanent increase in ambient noise ❑ ❑ ■ ❑ levels in the project vicinity above levels existing without the projecO d) A substantial temporary or periodic increase in ambient ❑ ❑ ■ ❑ noise levels in the project vicinity above levels existing without theproject? e) For a project located within an airport land use plan or, ❑ ❑ p ■ where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project expose people residing orworking in the project area to excessive noise levels? f) For a project within the vicinity of a private airstrip, ❑ ❑ ❑ ■ would the project expose people residing or working in the project area to excessive noise levels? R %Projects%DBarUo1ol15 MND-110502.wpd 46 initial Study/Mitigated Negative Declaration c u. Less Than ENVIRONMENTAL ISSUES Potentially Significant Leis Than (see attachments for information sources) Significant With Significant Impact Mitigation Imipact XIi POP[JL1TN AND HflliSiG=�lllfautd the A sell .: °... No mpa 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 ? ❑ ❑ ❑( i b) Displace substantial numbers of existing housing, necessitating the construction of replacement housing elsewhere? ❑ ❑ ! ❑ M c) Displace substantial numbers of people, necessitating the construction of replacement housing elsewhere? ❑ ❑ ❑ t a) Would the project resultin substantial adverse physical impac#s associated with the provision of new or physically altered govemment facilities, need far new or physically altered govemment facilities, the construction of which could cause significant environmental impacts, in orderto maintain acceptable service ratios, response times, or other performance objectives for any of the public services: } os Fire protection? © ❑ Police protection? ❑ ❑ Schools? p ❑ Paries? Other oublic facilities? © ❑ 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 facil' would occur or be accelerated? ❑ ❑ b) Does the project include recreational facilities or require the construction or expansion of recreational facilities which might have an adverse physical effect on the environment? ❑ ❑ XV. TRANSPDRTATIONfiRAFFIC--Would the ro ct: a) Cause an increase in traffic which is substantial in 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 capa.city ratio on roads, orcon estion at intersections)? ❑ ❑ b) Exceed, either individually or cumulatively, a level of service standard established by the county congestion management agency for designated roads or hi hwa s? El ❑ RAProie=%0BarU010%fS MND-110502mPd 4-7 Initial 5tuuy/Mitigated Negative Decla tion Summit Ridge Library R:U-mjectslDEWWD IS MND-110502.wpd 4 8 Initial Study/Mitigated Negative Declaration Less Than ENVIRONMENTAL ISSUES Potentially Significant Less Than (see attachments for information sources) Significant With Significant No Impact Mitigation Impact Impact c) Result in a change in air traffic patterns, including ❑ ❑ ❑ ■ either an increase in traffic levels or change in location that results in substantial sft risks? d) Substantially increase hazards due to a design feature ❑ ❑ p ■ (e.g., sharp curves or dangerous intersections) or incompatible uses e.., fans equipment)? e) Result in inadequate emergency access? ❑ p p ■ f) Result in inadequate parking capac€ty. ❑ ❑ ❑ ■ g) Conflict with adopted policies, plans, or programs ❑ ❑ ❑ ■ suppoMng alternative transportation (e.g., bus turnouts, bicycle racks)? ', ,f'$'NhWMr'.s-9 §, .f9:eea'" �� •5('..:. H:.-r✓+_e ,a^kv'y, .'Y< K S`�''S+ 'y$r "t g° `��' - t.11iT[L117E 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 wdsting facilities, the construction of which could cause significant environmental effects? c) Require or result in the construction of new storm water p ❑ ■ ❑ 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 ❑ Q ■ ❑ 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 ❑ ❑ p ■ regulations related to solid waste? R:U-mjectslDEWWD IS MND-110502.wpd 4 8 Initial Study/Mitigated Negative Declaration 1-ess Than ENVIRONMENTAL ISSUES Potentially Significant Les' Than (see attachments for information sources) Significant With Significant No Impact Mitigation impact 1 pa MANE)AT`OF2Y FINDINGS QF.SIGNI FICANC�kr w a. Does the project have the potential to degrade the ❑ 0 ❑ quality of the environment, substantially reduce the habitat of a fish orwildlife species, cause a fish or wild- life 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 rehisto b. Does the project have the potential to achieve short- ❑ ❑ 13 term environmental goals to the disadvantage of long- term environmental goals? c. Does the project have environmental effects which will ❑ 0 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)? DETERMINATION On the basis of this initial evaluation: ❑ 1 find the proposer! project COULD NOT have a significant effect on the environment, aid a NEGATIVE DECLARATION will be prepared. ■ 1 find that although the proposed project could have a significant effect on the environrr ent, there will not be a significant effect in this case because of the mitigation measures descr bed in the Mitigated Negative Declaration ❑ 1 find the proposed project MAY have a significant effect on the environment, anc an ENVIRONMENTAL IMPACT REPORT is required. ❑ 1 find that the proposed project is consistent with the Program E1R on: Date: I I E;'D 2— Thomas E. Smith, Jr., A! CP Environmental Planning Consultant R.1Aroje=08arUOI O S MND-110502.wpd 4-9 Initial Study/Mitigated hlegative Deciar tion SECTION 5 — ENVIRONMENTAL EVALUATION I. 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 vis as or highways nor would it impede views of scenic resources. There are no scirnic resp rces, rock outcroppings, or historic buildings located on or adjacent to the projelct site. c) Substantially degrade the existing visual character or quality of tl a site ar�d its surroundings? II Less than Significant Impact. Exhibit 5 provides photographs of the pr jest site laken from vantage points along Grand Avenue and Summit Ridge Drive, shown in the photos, the project site is being graded for the Summit Ridge Communi /Senior Canter which was approved by the City in February, 2002. The project site would be visible from Grand Avenue and selectively visible from some residences to the south, east and est. The greatest number of viewers would be along Grand Avenue due to the volu a 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 we t would not be obstructed. Existing views from these residences would be altered; however, const ion of the proposed building on the project site would not substantially alt�r the exi Aing condition because it is set back more than 300 feet from Grand Avenue. FL rthermor , the project site is not a focal point for these viewsheds. The backgrou d view o the surrounding hills are prominent visual features from most structures in the roject vi inity. These views would not be impacted by the proposed project. Landscaping throughout the park and on the perimeter of the project site uvould se a to soften the visual appearance of the proposed structure and parking areas. The pr jest would be compatible with the visual character and/or quality of the Community/Senior Center building (under construction), existing park areas, and surrounding lesidential 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 adversly affec day or nighttime views in the area? II Less than Significant with Mitigation. The proposed project would involve the construction of a library, and associated landscaped areas. The proposed st uctures 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 crecate a source of glare for adjacent residents, and nighttime security lighting could be visible from adjacent residential areas. However, implementation of the mitigation program w uld reduce potential impacts to a less than significant level. RAProjectsMarU0101€S MND-110502.wpd Summit Ridge Library MITIGATION PROGRAM MM 1-1 To minimize excessive light and glare, building exteriors shall use a low reflectance glass. Mirrored glass and other highly reflective building materials shall not be used on the exterior of the building. MM 1-2 Plant material, sidewalk paving, and other architectural design features included in the project landscape plans shall be incorporated on and around buildings to decrease reflectivity of constructed facilities and light and glare toward adjacent residences. MM 1-3 Outside light fixtures shall be consistent with the City of Diamond Bar Building Code, and the National Electrical Code, and shall be designed and installed at downward angles. Exterior lighting fixtures shall use low glare, shielded fixtures to reduce light intrusion onto adjacent land uses and open space. With application of the mitigation program, the proposed project would not result in significant aesthetics impacts. No additional mitigation is required. II. AGRICULTURAL RESOURCES: Would the project. 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 conversion of Farmland, to non-agricultural use? No Impact The proposed project site has recently been graded as part of the Summit Ridge Community/Senior Center project. Previously, the project site was a portion of an active park. The proposed project would not convert farmland to non-agricultural use. The site is not covered by a Williamson Act Contract nor located on land designated Prime Farmland, Unique Farmland, or Farmland of Statewide Importance, according to 1997 Natural Resource Conservation Service mapping. No agricultural resources impacts are anticipated. III. AIR QUALITY– Would the project.- a) roject: a) Conflict with or obstruct implementation of the applicable air quality plays? 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? Less than Significant with Mitigation (a);less than significant (b,c,d). California is — divided by the California Air Resources Board (CARB) into air basins which share similar 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 the non -desert R:Wmojec1s%DBarU010US MND-110502.wpd 5-2 Initial Study/Mitigated Negative Declaration 4 If olli vv .- 1 TI I 81'7 E P L A R -TERRACE SCHEME PRE-0E810N PHASE O O M td 0 k I T Y C E k T E R A M D L I B R A R Y — C I f Y O F 0 1 A 54 0 N Q R A - -� ,.. as c : -• r.� gmAzB.i$2�i _ w C �:.. .. a LC LE. Photo C C Site Photographs Summit Ridge Library Project Exhibit 5b CON$ LUTING Source Ban Terra Con.suihng. Oc'.oler 2002 5.US Exh bgs,'DBARIJ610tJnhibitSb 110402.pd i Iy 1 - C Site Photographs Summit Ridge Library Project Exhibit 5b CON$ LUTING Source Ban Terra Con.suihng. Oc'.oler 2002 5.US Exh bgs,'DBARIJ610tJnhibitSb 110402.pd Summit Rid Library portions of Los Angeles, Riverside, and San Bernardino counties. The Basin's climal a and topography are highly conducive to the formation and transport of air pollution. T e air pollutants of greatest concern in the SCAB are ozone (O,), carbon monoxide (CO), ar d fine particulate matter (PMt0). Peak concentrations have dropped significantly throughopt the air basin as a result of strict new emission controls and reformulated gasoline sold in inter months. The SCAB is under the jurisdiction of the South Coast Air Quality Management cistricl (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 SGNB is designated a non -attainment area for national ambient standards is Ozone (03).a is a colorless, odorless pollutant formed by a chemical reaction between olatile or anis compounds (VOCs) and oxides of nitrogen (NOJ in the presence of sunlight. The pr maty sources of VOCs and NOx are mobile, including cars, trucks, buses, agricultura and construction equipment. SRA -10 does not currently measure ambient PM,Olevels. However, many su regions ithin SCAG consistently exceed state standards fro PM10 concentrations. PIA10 consists of fugitive dust caused by soil disturbances such as construction grading anduses a gr Dater health risk than larger -sized particles, since these fine particles can be inha�ed 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 fro constru tion and long-term permanent impacts from project operations. The potential short -ter and long-term impacts of the proposed project are discussed below. To Bete' Mine whether emissions resulting from construction of a project are significant, The SCA MD recommends significance thresholds in its CEQA Air Quality Handbook, as revisd in November 1993 and approved by the SCAQMD's Board of Directors. he pollu nts addressed by the SCAQMD thresholds include carbon monoxide (CO), sulfa oxides( OX), nitrogen oxides (NO.), particulate matter (PM,()), and reactive organic compounds. B sed on the size of the project (approximately 0.8 acre) there is a low potential for M1p 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 forFIM,() emissions. The City has determined that these thresholds are appropriate f r the pro ect, in order to ensure regional consistency, and based on the best available scie tifiic 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 hEkuling trucks, employee vehicles, and paints and coatings. The SCAQMD CEQA Handbook estimates that each acre of disturbed. soil creates 26.4 pounds/day of PM70. I The project site was planned as an open, landscaped area as part of the S ummit Ri ge Community/Senior Center project and has already been rough graded for that use. Implementation of the proposed library project would require additional grading to devE lop a pad for the proposed library structure. If the entire approximately 0.8 a e library site were to be graded in one day, PM,() emissions would be approximately 21.1 pounds per day, prior to implementation of standard conditions of approval. In actuality, t e project f ite R1Pr0)eCtSk06arU010VS MND-110502.wptl ra3 initis! Study/MitioatPrf uPnarR.P ne,.i� t:,,.. Summit Ridge Library 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,, of 100 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., 400 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 Impacts 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. RAProjects06arU01Q1i5 MND-110502.wpa 5-4 Initial Study/Mitigated Negative Declaration Summit Pide a Libra • Provide for street sweeping, as needed, on adjacent roadways to remove dirt dropped by construction vehicles or mud which would otherAise be carried off by trucks departing project sites. Maintain two feet of freeboard capacity on all trucks hauling dirt. Tightly cover all loads of dirt with a tarp on all trucks leaving the sitel. • Apply extra water, if needed, to comply with provisions of SCAQM Rule 402, Nuisance, to insure that no visible emissions from construction activities can be observed beyond the property line. After mitigation, all construction emissions will be reduced to a level consi Bred less than significant. Mitigation measures, including adherence to Rule 402,will prevent xposure f any adjacent sensitive receptors to adverse emissions. Operational emissions a d local carbon monoxide concentrations are not significant and require no mitigation. There will a no significant adverse odors associated with the project during either construction or oder tion_ IV. BIOLOGICAL RESOURCES—Would the project: I a) Have a substantial adverse effect, eitherdirectly or through habitat m0dificati on, on any species identified as a candidate, sensitive, or special status spe les in local or regional plans, policies, or regulations, or by the California Department of Fish Game or U.S. Fish and Wildlife Service? and No Impact- The project site has beenraded as 9 part of the Summit Ridge Community/Senior Center project which was previously approved by the C ty. The Ic vegetation associated with grading the approximate 7 -acre Communityj Senior C ss of nter (including the'approximate 0.8 -acre site for the proposed library) was ad iressed ij i the IS/MND prepared for the Summit Ridge Community/Senior Center, and reqL ired mitig has been implemented. There is no vegetation remaining on the project site therefore, ation the proposed project would not impact any biological resources. The native vegetation which remains in park areas surrounding the project site (coastal sage scrub, coast live oak woodland, and non-native grassland) does provide resourc wildlife. Common amphibian and reptile species observed or expected on t e site in for ude Pacific tree frog (Hyla regilla), western toad (Bufo boreas), Pacific slend r salama (Batrachoseps pacificus), western fence lizard (Sceloporus occidentalis), ider side -blot ed lizard (Uta stansburinana), southern alligator lizard (Gerrhonotus'multicari acus), gopher snake (Pituophis melanoleucus), and western rattlesnake (Crotalus viddis). Common species observed during the survey include mourning dove (Zenaida bird mac ura), An ia's hummingbird (Calypte anna), Nuttall's woodpecker (Picoides nuttallii), lackh be (Sayomis nigricans), Say's phoebe Sa p ornis sa ( Y ya), western scrub jay (Apheloc californica), western bluebird (Sialia mexicana), northern mockingbird (Mime polyglo ma s), cedar waxwing (Bombycilla cedrorum), yellow-rumped warbler (Dendroica co nata), white - crowned sparrow (Zonotrichia leucophrys), lesser goldfinch (Carduelis psaltni), and ho ise finch (Carpodacus mexicanus). The northern harrier (Circus cyaneus) was tl ie only raptor (bird of prey) species observed during the biological survey conducted on tl ie site during preparation of the IS/MND for the Community/Senior Center. The northern harrier would be expected to nest in the grassland within and adjacent to the park. Other cc immon raptor species, such as the American kestrel (Falco sparvedus) and red -shouldered hawk (B lineatus), teo are expected to forage and potentially nest in trees within t ie park and i RAProjectsloSaNOICVS MNo-t 10502,wpd Jr -5 Initial 8tudy/M111gated Negative tecta tion Summit Ridge Liber surrounding areas. There are no trees on the proposed library site. Mammal species or evidence of their presence observed within the project area (prior to grading activities) included desert cottontail (Sylvilagus audubonit) 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, raptorspecies 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 CDFG 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 !Nater Act (including, but not limited to, marsh, vernal pool, coastal, etc.) through direct removal, filling, hydrological interruption, or outer 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 Impact 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 (ACOS). 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 racemosa), willows (Salix sp.), or naturalized pepper trees (Schinus molle) would be subject to the local tree ordinance. Any trees removed are required to be mitigated at a ratio of 3, 1. Coast live R:IProjectMDBarL010115 MND-110502.wpd 5-6 Initial Study/Mitigated Negative Declaration summit LL6bm 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 during construction. There are no trees in proximity to t e site which would be impacted during construction. No mitigation is required. f) Conflict with the provisions of an adopted Habitat Conservation Plan, N tural Community Conservation Plan, or other approved focal, regional, or state h bitat conservation plan? No Impact. The project site is not within an adopted Habitat Conservation Plan, Community Conservation Plan or other habitat conservation plan area. No imp: anticipated. V. CULTURAL RESOURCES—Would the project: a) Cause a substantial adverse change in the significance of a histori defined in §15064.5? b) Cause a substantial adverse change in the significance of an archaeol pursuant to §15064.5? c) Directly or indirectly destroy a unique paleontological resource or geological feature? d) Disturb any human remains, including those interred outside of forrr No Impact. The project site is located on a hilltop which was graded duri of the original Summit Ridge Park and, more recently, the Community/Ser historic or paleontological resources were uncovered during grading and r to exist on the project site. Furthermore, no historic or paleontological i uncovered during grading and construction of surrounding homes in the imi of the project site_ Additional grading that would be required for com proposed library would occur on fill material and would not have the pot( cultural resources. No mitigation is required. VI. GEOLOGY AND SOILS—Would the project: a) Expose people or structures to potential substantial adverse effects, risk of loss, injury, or death involving: 1) Rupture of a known earthquake fault, as delineated on the most rJ Priolo Earthquake Fault Zoning Map issued by the State Geologist based on other substantial evidence of a known fault? Refer to Divi 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 would bec as a result of the project, and potentially result in onsite or offsite lan spreading, subsidence, liquefaction, or collapse? e) Have soils incapable of adequately supporting the use of septic tanks waste water disposal systems where sewers are not available for th waste water? No Impact. The project site is not located within an established Alquist-Pric as delineated by Division of Mines and Geology Special Publication 42. Th ground rupture from fault movement within the site boundaries is con, RAProiectslDBarUp7Ol#S MND-11050ZWpd 5-7 Initial Studv/Mitiaated Ni ical ite or are ; are a as irce que es? tion No zwn ,ere nity the al to irrpacl -ludin. the ,nt Alq ist- the arep or m of Mines of Study Z ne potentia I for lered tol be Summit Ridge Library 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 .!he 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 a substantial soil erosion or the loss of topsoil? d) Be located on expansive soil, as defined in Table 18-1-B of the Uniform Building Code (1994), creating substantial risks to life or property? Less than SignWicant 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 Jose 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 8.7 and the peak horizontal ground acceleration is 0.59 g (g is the acceleration of gravity, equal to 32 feet/second). The San .lose, 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'x. There is a potential for soil erosion during grading and construction operations. However, provisions for surface drainage, terrace drains, slope planting, and other measures outlined RAProjeti WarwaiOIV3 MND -1 iosoz.wpe 5-8 Initial Study/Mitigated Negative Declaration Summit Ridde Ubra in the approved Stormwater Pollution and Prevention Plan (S>IVPPP) f r the Community/Senior Center project site (which includes the proposed library si e) are discussed in Section 8 (Hydrology and Water Quality) of this Initial Study would redt ice the erosion potential to a level considered less than significant. During current grading activities at the site, the soil was over -excavated in areas where highly expansive clays were encountered. Additionally, further testing would be performed after rough grading on near -surface soils in order to determine final fou dation recommendations for the proposed library. The project would not have impacts related to expansive soils. The proposed library and structure are required to be designed in acco Building Code (UBC) standards, and other City of Diamond Bar, state, requirements. Design would undergo review by the City Engineer to with the aforementioned standards. With proper design, impacts asst groundshaking, landslide hazards, erosion, and/or expansive soils v less than significant. VII. HAZARDS AND HAZARDOUS MATERIALS—Would the project: a) Create a significant hazard to the public or the environment throw transport, use, or disposal of hazardous materials? b) Create a significant hazard to the public or the environment throu foreseeable upset and accident conditions involving the release materials into the environment? C) Emit hazardous emissions or handle hazardous or acutely hazard substances, or waste within one -quarter -mile of an existing or props d) Be located on a site which is included on a list of hazardous materials pursuant to Government Code Section 65962.5 and, as a result, we significant hazard to the public or the environment? e) For a project located within an airport land use plan or, where such been adopted, within two miles of a public airport or public use airp project result in a safety hazard or people residing or working in a pi f) For a project within the vicinity of a private airstrip, would the proj safety hazard for people residing or working in the project area? g) Impair implementation of or physically interfere with an adopte response plan or emergency evacuation plan? h) Expose people or structures to a significant risk of loss, injury, or di wildiand fires, including where wildlands are adjacent to urbanized a residences are intermixed with wildlands? No Impact. The project site was vacant prior to its development as a comrr uses involving the transport, storage, use, emission, or disposal of hazardou occurred on the project site. The proposed project would not involve the rot storage, use, emission, or disposal of hazardous materials. The site is not located within one -quarter -mile of an existing school nor hazardous emissions or involve the handling of hazardous or acutely hazari or substances. The project site is not included on a list of hazardous mal compiled pursuant to Government Code Section 55962.5, nor is it located w land use plan or within the vicinity of a private airstrip. The project would interfere with an adopted emergency response plan or emergency evacuat ce with U iform federal z gency ure comr fiance ed with s Dismic I be cons dered lh the r utine lh reaso ably of haze dous Res co fled 11d it cre ite a plan has not )rt, would the Dject area? !ct result in a I emergency ath involving eas or w ere inity park No materials has tine trans ort, would it mit ous mate ials trials site as :hin an ai port lot physi ally m plan. R-.wtu ectsMBarUP105t5 MND-110502.wpd s�9 Tniiia! Study/Mitigated Negative Summit Rldye Library 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. VIII. HYDROLOGY AND WATER QUALITY—Would the project: a) Violate any water quality standards or waste discharge requirements? Less than SigniFcant 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 WaterAct 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 underthe 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 the Diamond Bar Planning Department. 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 dikes, street sweeping and washing, and slope protection), management of contaminated soils, hazardous waste management, vehicle and construction equipment storage and maintenance procedures, and the timing of grading to avoid the rainy season (November through April). in addition to the requirements of the NPDES program, provisions of the Uniform Building Code, and grading permit requirements specified by the City include R:rProjedsi,MarVDIOUS MND-110502.wpa 5-10 initial Study/Mitigated Negative Declaration E� 1 C Summit Rid fibra elements that also require reduction of erosion and sedimentation impacts. Implementation of the SWPPP would ensure full compliance with applicable local, state, and federal ater quality standards and reduce impacts to a level considered less than significant. Once developed, the proposed project would have the potential to cause water quality impacts typical of urbanization, including oil, grease, refuse and tire particulate matter from vehicles parking and driving within the parking lots. The increase in pollutant sources eads to an increase in pollutant loads found in storm water, while the increaso in impervious surfaces prevents natural processes from reducing those pollutant loads. The impervious surfaces associated with urbanization prevent storm water from infiltrati6g into the soil resulting in storm water flows that are typically higher in volume and pollutant loads. Implementation of the SWPPP would reduce impacts to a less than significant level th ugh post construction BMPs such as weekly street sweeping/washing of project parking lots. It should be noted that landscaping can contribute pesticides and phosph to fertilizers to stormwater runoff. As noted in the project description, landscaping on the roject sit 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 Nith 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 granted? c) Substantially alter the existing drainage pattern of the site or area, including thr ugh the alteration of the course of a stream or river, in a manner which would res It in substantial erosion or siltation onsite or offsite? d) Substantially alterthe existing drainage pattern of the site orarea, including thro igh the alteration of the course of a stream or river, or substantially increa Ia the rat or amount of surface runoff in a manner which would result in floodi g onsito or offsite? e) Create or contribute runoff water which would exceed the capacity f existini or planned stormwater drainage systems or provide substantial additional source of pollutant runoff? f) Otherwise substantially degrade water quality? g) Place housing within a 100 -year flood hazard area as mapped on a f deral Flood Hazard Boundary or Flood Insurance Rate Map or other flood hazard del, neation map h) Place within a 100 -year flood hazard area structures which would impede or redi ect flood flows? 1) Expose people or structures to a significant risk of loss, injury, or death involving flooding, including flooding as a result of the failure of a levee or damp j) Inundation by seiche, tsunami, or mudflow? f No Impact. The proposed project is located in the San Gabriel watrshed wt encompasses 462,080 acres in the Los Angeles and Orange Counties. Aquifer recha occurs primarily within the gullies, canyon bottoms, and washes in the vicinity f the pro site. Given that the project site is located on a hilltop and stormwater generated on, would either flow into natural open space areas and storm drains or percolate into on, soils, the proposed project would not impact aquifer recharge. The project site is located at the top of a hill and is currently under constrLction for Community/Senior Center project. Upon completion, the developed project ite would divided into three main drainage areas: the eastern portion of the eastern pa king lot; KWr01ectsla8arU0101i5 MNb-TID502wpd Negative ich Summit R. a Libraty eastern parking lot and Community/Senior Center and associated landscaping; and the western parking lot/proposed library and associated landscaping. Stormwater flows originating on the eastern 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 gunniie 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 stomnwater 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 1 00 -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? No Impact The proposed project site is located at the center of three different community/neighborhoods which have formed as a result of highly variable topography and distinct general plan land use designations. The project site is designated as park space by the City of Diamond Bar general plan and acts as a hub that is shared by local residents - within these neighborhoods, as well as other residents within the City. The project would not result in the physical division of an established community. Additionally, the project site RAPro?W,U0BarU010115 MN6.1105Q2.wpd 5-12 fnitial Study/Mitigated Negative Declaration is not covered under a habitat conservation plan or natural community conservation plan. No impacts are anticipated. 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 ordinance) adopted for the purpose of avoiding or mitigating an environmental effect? No Impact. The City of Diamond Bar was incorporated in 1989. Prior to ineorporatio , the City followed the guidelines and policies of the County of Los Angeles goneral plai i and zoning code. The City of Diamond Bar adopted its own general plan and zoning rr ap in 1995. 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 land use designation does not specifically define the types of park facilities pro ided or 1 ilace restrictions on types of structures that can be developed on park facilities. Therefor , the proposed project would not conflict with the general pian 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 u 3e designation imposed upon the property by the City of Diamond Bar general plan. FL rthermor , the project involves the addition of infrastructure to an existing park and woulc not result in a change of land use. Therefore, the change would not result in a significant land use impact. X. MINERAL RESOURCES—Would the project. a) Result in the loss of availability of a known mineral resource that would be of to the region and the residents of the state? b) Result in the loss of availability of a locally -important mineral resource] recover delineated on a local general plan, specific plan, or other land use plan? No Impact The Surface Mining and Reclamation Act of 1975 (SMARA) mandate the initiation of mineral land classification by the State Geologist in order to hep identify and protect mineral resources in areas within the State subject to urban expaiision or c ther irreversible land uses which would preclude mineral extraction. SMARA also allowec the State Mining and Geology Board (SMGB) to designate lands containing mi feral de sits of regional or statewide significance in accordance with classification criteria ram theate Geologist. Four mineral resource zone (MRZ) categories have been identified by the State Geologist: The MRZ-1 designation identifies areas where adequate geologic informationindicates hat no significant mineral deposits are present, or where it is judged that little lielihood a 'sts for their presence. The MRZ-2 designation identifies areas where geologic Mata indic tes that significant resources or inferred resources are present. The MRZ- designa ion identifies areas of undetermined mineral resources. The MRZ-4 designa ion identi les areas where geologic information does not rule out either the presence r absent of mineral resources. The project site is currently designated as MRZ-3 by California Division f Mines nd Geology mineral resources maps. The project site is considered an area of :ndetermirherf RAProjects%D9arUOIDUs MND-110502.wpd 5-13 Initial Summit Ridge librar�r 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. XI. 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 groundbome vibration or groundbome 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 Signiricant 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 68 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 quieter than grading operations. The same peak noise levels are often reached during 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, and these uses - are considered sensitive noise receptors. These sensitive receptors could potentially experience noise levels during project grading that would exceed the City's noise standards, depending on their distance from the operating equipment. The closest existing residences RAProjects%0BarUD1DV5 MND-410502.wpd 5-14 Initial Study/Mitigated Negative Declaration Summit Ridge Libra. are located approximately 500 feet from the proposed grading limits and are there€ re not expected to be subjected to noise levels as high 85 to 95 dBA during construction. Nevertheless, residents in the areas adjacent to the project site may be subjected to noise levels during construction which could exceed the City's noise standards, which wo ld be considered a significant impact prior to mitigation. The most effective method of controlling construction noise is through local control of construction hours. The City of Diamond Bar Noise Ordinance does not alllow cons ction 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 f=ederal holiday, and exempts construction activitlies occurring at other times (i.e., during daytime hours) from the noise ordinance threshold. Compl,ance with the noise ordinance is required as a condition of issuance of grading permits and i uid therefore reduce potential short-term noise impacts to a level considered less than significant. Long-term Noise Impacts The proposed project would be located within the approved Community/Se for CentE r site and would not result in a significant increase in evening ambient nois levels f r the residents to the east of the project site. The noise generated by proposed uses wo id be associated with patrons of the facilities walking to and from their vehicles and traffic i Joise from vehicles entering the site. These noise sources are not expected to a teed the ioise standards outlined in the City's noise ordinance. The traffic generated by the project has the potential to increase noise levels on vicinity roadways. The daily traffic volumes with the project on Summit Ridge Driv in the vicinity of the project site would be approximately 400 vehicles. Noise levels in adja ent homes on Summit Ridge Drive are not expected to exceed City standards. Therefore, the project would not cause long-term traffic -related noise impacts. Short-term noise impacts would be reduced to a level considered less than ignificant with implementation of the mitigation program. 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, wouic the project expose people residing or working in the project area to excessive n )ise levels? f) For a project within the vicinity of a private airstrip, would the project a pose pe pie residing or working in the project area to excessive noise levels? No impact The proposed project is not located within an airport'land use plan or w thin the vicinity of a private airstrip. No impacts are anticipated. MITIGATION PROGRAM MM 11-1 The City of Diamond Bar has adopted a Noise Ordinance which (specifies hat outdoor construction activities shall not take place between the iours of :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 t e contractor specifications and shall be verified by the Building Official. i RAProjects%DBarw0J0AJs MND-110562.wpd 5-15 1"Na/ Study/Mitigated Negative Delia tion Summit Ridge Library 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. XIII. PUBLIC SERVICES a) Would the project result insubstantial 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 Fire 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. Schools? Parks? Other public facilities? No Impact. The proposed project would not result in the need for additional school or park capacity. The project would not result in population growth which could otherwise increase RAProjectrUBa1 OMIS MND-110502.wpd 5-16 Initial Study/Mitigated Negative Declaration the burden on such public facilities. Additionally, the project would provide a public ibrary for use by the residents of the City. No impacts are anticipated. XIV. RECREATION: a) Would the project increase the use of existing neighborhood and re0ional pa ks or other recreational facilities such that substantial physical deterioratidn of the f cility would occur or be accelerated? b) Does the project include recreational facilities or require the cpnstructi n or expansion of recreational facilities which might have an adverse physical effect on the environment? No Impact The proposed project would not result in population grovdh which could otherwise increase the burden on park and/or other recreational facilities. No impacts are anticipated. The proposed project does not include recreational facilities or require the construction or expansion of recreational facilities. No impacts would result aild no mitigation is required. XV. TRANSPORTATION/TRAFFIC—Would the project: a) Cause an increase in traffic which is substantial in relation to the existing traffid load and capacity of the street system (i.e., result in a substantial increa a 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 by the county congestion management agency for designated roads established or highways? Less than Significant Impact The proposed project is located on the norl h side of Grand Avenue west of Summitridge Drive. Upon project completion, the primary v hicular access point to the project will be from a driveway on Grand Avenue opposite the F rivate roa Jway Shotgun Lane. A secondary access is currently provided via Summitridgq Drive. 1 An Intersection Capacity Utilization (ICU) analysis was conducted by Warren C. S ecke (December 2001) to evaluate the traffic operating conditions at the intersectons of Grand Avenue at Diamond Bar Boulevard and Grand Avenue at Summitridge Drve. The traffic analysis considered development of the Community/Senior Center proje�t as well as a library. The study intersections were selected for evaluation because they are close the project site and most likely to be impacted by activities at the project site. By calcul Rting ICU's for these intersections the operating conditions which are defined in terms of Level of Service (LOS) A, B, C, D, E or F can be determined. LOS is described as a value, v fich is associated with vehicle delay times (in seconds), where "A" is considered a free flow condition (i.e., an average delay of less than 10 seconds per vehicle) an "F" is be and capacity (i.e., an average delay of more than 80 seconds per vehicle). Usinc 1 these criteria, the existing intersection capacity utilization and operating conditions were d termined. The results of the analysis are presented in Table 1. RAProject OBarU01011S MND-110502.wpd Summit Ri a Libra TABLE 1 EXISTING INTERSECTION CAPACITY UTILIZATION t Y s X �y� „g - AM Pear Hour PM 17 I�eaft Sour ORGrand Avenue & Diamond Bar Boulevard 0.956 E 1.301 F Grand Avenue & Summitridge Drive 0.991 E 0.764 C Source: Warren C. Siecke, December 2DO1. Traffic volumes generated by the proposed project were calculated using generation rates in the Trip Generation Manual, Wh 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 FORECAST TRAFFIC VOLUMES PROPOSED LIBRARY TABLE 3 SUMMARY OF INTERSECTION CAPACITY UTILIZATION IMPACTS RAProjectsMar MVS panto-110502-wpd 5-18 Initial Stady AR(gated Negative Declaration Daily Trips a Inbound , �utboued meq, -: Inbound5.0ftoun� 4� ' 400 6 2 20 20 TABLE 3 SUMMARY OF INTERSECTION CAPACITY UTILIZATION IMPACTS RAProjectsMar MVS panto-110502-wpd 5-18 Initial Stady AR(gated Negative Declaration The proposed library project would generate'ar additional 400 daily trips; to and from the project site. Project related traffic would result in changes in ICU that are less than 0.006 (0.6 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 generally considered significant. The intersection of Grand Avenue and Diamond Bar Boulevard is currently operating beyond capacity and is impacted in the existing condition. Nonetheless, the pro osed library project's contribution is de minimis and would not discernibly impOct traffic 3t this intersection. No significant impacts are anticipated. Although not required as mitigation, the traffic report recommends that Grartd Avenue Drive west of the intersection with Summitridge Drive be modified to remove tho existing aised median, and that the roadway be restriped, and reconfigured to provide a mleans of in I ress/ egress to the park for both directions of traffic on Grand Avenue. This improve ent is currently being designed by the City. 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 cures 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 aite ative transportation (e.g., bus turnouts, bicycle racks)? No Impact The proposed project would not affect air traffic pattern nor would it increase hazards due to design. The project includes two access roads t adequate emergency access. ereby allowing Within the entire Community/Senior Center development site, 300 parkin spaces ould be provided; 81 would be adjacent to the library. The parking available at tide site woL ild be sufficient to accommodate the proposed library uses, and no parking impacts would r Lhsult. The project library project would not conflict with adopted City policies, plans, or programs supporting alternative transportation. No mitigation is required. XVI. UTILITIES AND SERVICE SYSTEMS --Would the project: I a) Exceed wastewater treatment requirements of the applicable Regional WaterQ ality Control Board? b.) Require or result in the construction of new water or wastewater treatment faci lities or expansion of existing facilities, the construction of which could cai ise signif cant environmental effects? c) Require or result in the construction of new storm water drainal a facilities or expansion of existing facilities, the construction of which could cal. se signif cant environmental effects? d) Have sufficient water supplies available to serve the projectrom exi ting entitlements and resources, or are new or expanded entitlements n ded? e) Result in a determination by the wastewater treatment provider which erves or may serve the project that it has inadequate capacity to serve the proje is projected demand in addition to the provider's existing commitments? Less than Significant Impact. Wastewater service in the City of Diamond Bar is cur ntly provided by the County of Los Angeles Sanitation District. Wastewater generated iO the RAProjects%O5ar1J0101J5 MND-110502.wpd 5-19 initial Summit FUdge Libra 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, the 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 (TVMWD) 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 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? 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 both construction and mixed municipal waste, has a permitted throughput of 13,200 tons/day, and remaining capacity of 20,200,000 cubic yards. The proposed project would generate a negligible amount of solid waste in the City-wide or regional context. The Puente Hills Landfill has sufficient permitted capacity to accommodate the proposed project's solid waste disposal needs. The proposed project will comply with federal, state, and local statutes and regulations related to solid waste. No significant impacts are anticipated. R:TrO )eCtS\06arU01M1S MNQ-110502.wpd 5-20 Initial Study/Mitigated Negative declaration D 1 SECTION 6 — REPORT PREPARERS AND CONTRIBUTORS LEAD AGENCY Deputy City Manager ........................... James DeS efano Deputy City Manager ................................... David Doyle Director of Public Warks ................................... Da id Liu Associate Planner .............................................. Ann ungu BONTERRA CONSULTING Project Manager . .............................. Thomas E. Smith, Jr., 'CP Environmental Analysis .................................. Christina L. An rsen RMND-11()502.wpd 6-1 Initial 'Wdy/AV,gated Negative 1 1 C summit SECTION 7 — REFERENCES California Integrated Waste Management Board. Solid Waste Information System (Sl www.ciwmb.ca.gov/SWISI 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 Community/Senior Center. Department of Mines and Geology. 2000. Seismic Hazards Maps - Yorba Linda uadraa Nunsaker & Associates. January 2002. Storm WaterPollvtion Prevention Plan for he Cote Center in the City of Diamond Bar. Leighton & Associates. December2001. Preliminary Geotechnical investigationfo�rthe Community Center at Summitridge Park. Leighton & Associates. January2002. Addendum to Geotechnical Investigation four the Community Center at Summitridge Park. Siecke, Warren. 2002. Trac Analysis for the Summitridge Community/Senior Southern Califomia Air Quality Management District. 1999. CEQA Handbook. US Environmental Protection Agency. 2000. Watershed Assessment Database www.epa.gov/surf3/states/CA Warren C. Seike. December 4, 2001. Letter Report from Warren C. Seiki to r. Davidl Liu, Director of Public Works, City of Diamond Bar addressing traffic impact aalysis fo the Community/Senior Center and Library Project. r . Initial Study/Mitigated Negative 1 1 Section 10 MITIGATION MONITORING PROG THE SUMMIT RIDGE LIBRARY PRO CT for; The City of biamonc Bar 21825 E.opley rive Diamond B r, CA 9 765 Contact: Mr. James DeSte ano Deputy gity Man per C0NSULIT IN 151 Kalmus Drive, Suite I Costa Mesa, Califgmra c Contact. Mr. Thomas E. Smith, Jr., Al i Novemb r 27, i The Summit Ridge U )nary project The Summit Ridge Library Project Mitigation Monitoring Program Introduction Section 21084.6 of the State of California Public Resources Code requires a Lead or Responsible Agency that approves or carries out a project where a Mitigated Negative Declaration (MND) has identified potential significant effects to adopt a "reporting or monitoring program for adopted or required changes to mitigate or avoid significant environmental effects." An MND has been prepared for the construction of The Summit Ridge Library Project which addresses the potential environmental impacts, and where appropriate, recommends measures to mitigate these impacts. The MND was circulated for a 20 -day public review period from November 6 to November 26, 2002. The City of Diamond Bar, as lead agency for the implementation of The Summit Ridge Library Project, is responsible for implementation of the mitigation monitoring program (MMP). Res onsiti lities The MMP for The Summit Ridge Library Project will be in place through construction of the project or until all mitigation measures are implemented. The City of Diamond Bar is the primary agency responsible for verifying compliance with the mitigation measures listed in the table below. Proiect Description The Summit Ridge Library Project consists of the construction of a new library building in the _ City of Diamond Bar. The library would be approximately 25,000 square feet. The project would be constructed on an approximately 0.8 -acre site within the northwestern portion of the existing 17 -acre Summit Ridge Park, adjacent to and west of the approved CommunitylSenior Center which is currently under construction. Access to the site would be from Grand Avenue and Summit Ridge Drive. 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 Bookstore, computer areas, study and meeting rooms, lounge area, lobby/checkout/registration area, cultural/historical display, children's library area, offices, communication room and homework center. The project would be constructed in one phase. Library occupancy is projected for mid -2005. i2.4PrajecLslpBarLf0701MMP-172602.tlac .� Mitigation Monitoring Program THE SUMMIT RIDGE LIBRARY PROJECT MITIGATION MONITORING PROGRAM November 27, 2002 Timing I Measure Aesthetics Prior to approval of iinalTa minimize excessive light and glare, building exteriors shall use a low reflectance glass. project design Mirrored glass and other highly reflective building materials shall not be used on the exterior of the building. Prior to approval of final Plant materiaf, sidewalk paving, and other archilecturai design features included in the Project design project landscape plans shall be incorporated on and around buildings to decrease reflectivity of constructed facilities and light and glare toward adjacent residences. Prior to approval of final Outside light fixtures shall be consistent with the City of Diamond Bar Building Code, the project design National Electrical Code, and shall be designed and installed at downward angles. Exterior lighting fixtures shall use low glare, shielded fixtures to reduce light intrusion onto adjacent land uses and open space, Air Quality all grading and All construction contractors shall comply with SCAQMD regulations, icluding Rule 402, [tion activities thn eNuisance Rule, and Rule 403, Fugitive Dust. Because the area undergoing grading is the si below ze 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 ensure 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. [:ease radin when winds exceed 25 RTrojectslD138rWI MMP-112602,doc The Summit RiAy f rpiect Responsible for Monitoring Compliance Community and Development Services Department. Community and Development Services Department Community and Development Services Department and Public Works Division Cammunily and Development Services Department, City of Diamond Bar Building Official Completion Date I Initial Mifigafion Moniforing Program —� The Summit Midge Library project Measure Provide for street sweeping, as needed on adjacent roadways to remove dirt dropped by construction vehicles or moff mud which would otherwise be carried o by trucks departing projo Timing ct sites. Maintain two feet of freeboard capacity on all trucks hauling dirt, • Tightly cover all toads of dirt with a tarp on all trucks leaving the site. JApplysure extra water; if needed,tocomplywith provisions of SCAQMD Rule ,402, Nuisance, that no visible emisslons from construction activities can be observed beyond the ro ert line, Hydrology and Water Quality Responsible for Completion Monitoring Compliance date FInlilal Prior to initiation of Mitigation requirements outlined in the SWPPP for the Community/Senior Cente711brary ommunity and grading activiliesor finish site (which includes the library site) shall be implemented during construction of thevelopment building construction project.ervices Department, ity of Diamond Bar Noise uilding Official During construction The City of Diamond Bar has adopted a Noise Ordinance which specifies that outdoor Community and activities construction activities shall not take place between the hours of 7:00 p.m. and 7:00 a.m. Development on weekdays and Saturdays, or at any time on Sunday or a Federal Holiday. These time Services Department, restrictions shall be included on the contractor specifications and shall be verified by the City of Diamond Bar Building Official, During construction Building Official g All construction vehicles or equipment, fixed or mobile, shall be equipped with properly Community and activities operating and maintained mufflers. This requirement shall be included on the contractor Development specifications and shall be verified by the Building ONicial, Services Department, City of Diamond Bar During construction Building Official g Stockpiling and/or vehicle staging areas shall be located onsite and as far as practical Community and activities from sensitive no receptors, i.e., residential areas, This requirement shall be included Development. on the contractor specifications and shall be verified by the Building Officlal. Services Department, City of Diamond Bar Building Official K:WF j CW0BarV0301MMP•172602,doc Mifigatirnr Mnniforinq l�rngram