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Home My WebLink AboutWQMP Lyndie Lane Dental Office Project Specific Water Quality Management Plan For: Lyndie Lane Dental Office 42210 Lyndie Lane, Temecula, CA 92590 DEVELOPMENT NO. PARCEL 1 OF PARCEL MAP 24169 (BK164/PP67 -68) DESIGN REVIEW NO. DESIGN REVIEW NO. PA10- 211 /LD11 -045GR Prepared for: Bruce Baker, DMD 13422 Pomerado Road Poway, CA 92064 -3548 Telephone: 858 - 717 -2929 Prepared by: David A. Ashcroft, PE Engineering Consulting Group 12790 El Camino Real, Suite 130 San Diego, CA 92130 Telephone: 858 -259 -4711 WQMP Preparation /Revision Date: May 24th, 2010 /September 9th,2011 AC« ' , WATER QUALITY MANAGEMENT PLAN (WQMP) 1 .: INITIAL CHECKLIST s ? , ,' Applicant Name: 1 1 b Asti �Th�T - , , �_ tsa ,; •A i `�,�' Planning Application Number: O I I Project Name: L`( N D Vi UL�1 - E Does the proposed project incorporate any of the following categories? Yes No (All questions must be answered) Modifications to Existing Developments — This category includes projects that create, add, or replace 5,000 sq. ft. or more of impervious surface on an already developed site. This category includes: (a) Expansion of a building footprint, or addition or replacement of a structure; (b) Increase in the gross floor area, or major exterior construction or remodeling; 1 (c) Replacement of impervious surfaces that are not part of routine maintenance activities; (d) Land disturbing activities related to a structure or impervious surface. /� Note: If modifications create less than 50% of the impervious surface of a previously existing development, and the existing development was not originally subject to WQMP requirements, a WQMP shall be required only to the addition, and not to the entire development. 2 Residential Development - This category includes subdivisions of single - family homes, multi- family homes, " condominiums, and apartments consisting of 10 or more dwelling units. J� e 3 Non - Residential Development - This category includes projects where the land area for development is greater " than 100,000 sq. ft. 7 ( Automotive Maintenance and Repair Shops - This category includes facilities engaged in general maintenance __ 4 and mechanical repairs, body and upholstery repair, painting, transmission and exhaust repair, tire servicing, and X glass repair. Restaurants - This category includes all eating and drinking establishments where the land for development 5a is greater than 5,000 square feet. X Restaurants where the land area for development is less than 5,000 sq. ft. are only required to follow the site X 5b design and source control requirements of the Water Quality Management Plan. Hillside Development — This category includes any developments that create more than 5,000 sq. ft. of 6 impervious surface, are located in an area with known erosive soil conditions, and where the project will require X grading natural slopes of 25% (4:1) or steeper. Environmentally Sensitive Areas (ESAs) — This category includes all development located within or directly adjacent to or discharging directly to an ESA which either creates 2,500 sq. ft. of impervious surface or increases the area of imperviousness by 10% or more of its naturally occurring condition. 7 Note: "Directly adjacent" means within 200 feet of the ESA. "Discharging directly to" means outflow from a X drainage conveyance system that is composed entirely of flows from the subject development or modification, and not commingled with flows from adjacent lands. Parking Lots — This category includes projects that create 5,000 sq. ft. or more of impervious surface for 8 temporary parking or storage of motor vehicles. This category includes parking areas associated with any of the X developments outlined above. Routine maintenance, including removal and replacement, is exempt. Streets, Roads, Highways & Freeways — This category includes projects that create 5,000 sq. ft. or more of 9 impervious surface for transportation of motor vehicles. Routine maintenance, including removal and x replacement, is exempt. 10 Retail Gasoline Outlets — This category applies if either of the following criteria is met: (a) 5,000 sq. ft. or more ,410 of impervious surface, or (b) a projected `Average Daily Traffic' count of 100 or more vehicles per day. If you answered "YES" to any of the questions above, a project - specific Water Quality Management Plan must be prepared and submitted. 14 ; »a ' ~` WATER QUALITY MANAGEMENT PLAN = 1 \ it CONCEPTUAL ACCEPTANCE CHECKLIST v ; am 4` 1989 Conceptual Water Quality Management Plan (WOMP) A conceptual WQMP must be accepted by the City Engineer prior to issuance of Final Conditions of Approval. A conceptually accepted WQMP shall be submitted to the Public Works Department as part of the grading submittal package. Applicants shall confer with the City's engineering staff to ensure adherence with the latest version of the Project- Specific WQMP Template. At a minimum, the following sections of the WQMP template shall be satisfied: p, b . - ' '*" L k t� '" trY xp, ti i t `at F s �5 .^+' .fie ti 3sa aapila rs �a P ,. .* ;;VN`V t ,°,'mot WQMP SeCttOn Z A -: a !P v n T ide Of Section a c * Y v 3I >> I «c ..a tat.. .p.m > ¢�fi4sl�rwh.�f �;.,,..mikagrw.,,.., i.� ;a...a.w .,,4., 11.pown.a..EA f Ah v 11114H:r�ttRhi 1 Project Description III Pollutants of Concern IV Hydrologic Conditions of Concern (Surface Hydrology) V.1 Site Design BMPs V.3 Treatment Control BMPs VI Operation and Maintenance Responsibility for Treatment Controls Appendix B WQMP Site Plan (24 "X36 "), conceptual landscape plan (24 "X36 ") Appendix C Supporting Detail related to Hydrologic Conditions of Concern (Surface Hydrology report) Appendix E Soil and Percolation Reports that specifically address soil infiltration properties Appendix F Treatment Control BMP Sizing Calculations and Design Details Final Water Quality Management Plan (WQMP) A finalized WQMP will include finalizing the conceptually accepted portions of the WQMP and acceptance by the City Engineer prior to issuance of any grading permits. A final WQMP shall include the remaining sections of the Project - Specific WQMP Template outlined below: t� IW MP § tlOn s N r " a" i . ti title Of gSCCtIOIi r a s 1 cg ' i firi srr�..�.nnrsi xa �.,.�°w.�.�a..., s.;r,.t.v rS.,a.,,c.'Tt.,.a, .., my „.v .,..m , . , a36sl:.uh v6rx. �; L�.��t2.��. � �k.,a.,868 11 Site Characterization V.2 Source Control BMP's V.4 Equivalent Treatment Control Alternatives V.5 Regionally -based Treatment Control BMP's VII Funding Appendix A Final Conditions of Approval Appendix B Vicinity Map, Receiving Waters Map Appendix D Education Material Appendix G O &M Agreement Appendix H Phase 1 Environmental Site Assessment Page 1 of 4 Revised 03/20/2009 `; ` WATER QUALITY MANAGEMENT PLAN . CONCEPTUAL ACCEPTANCE CHECKLIST w 1989 Item Addressed? CONCEPTUAL WQMP REQUIREMENTS Yes No Not Applicable General' Three -Ring Binder Tabbed Appendices Title Page �C Table of Contents Section I. Project Description On narrative form) Project location X Project size (to the nearest 1 /10 acre) Standard Industrial Classification (SIC) Code Description and location of all buildings, proposed activities, locations of these activities, materials and products to be used and stored for each activity and at each building, delivery areas, and what kinds of wastes will be generated from each building and the entire project • Project watershed and sub - watershed �\ Formation of a Home Owner's or Property Owner's Association Additional permits /approvals required for the project including: • State Department of Fish and Game, 1601 Streambed Alteration Agreement; • State Water Resources Control Board, General Construction Permit; y • Regional Board, 401 Water Quality Certification; /\ • US Army Corps of Engineers, 404 permit; • US Fish and Wildlife, Endangered Species Act section 7 biological opinion; • Municipal, grading and building permits. Section 111 Pollutants of Concern (in narrative form) Completed table of potential and expected pollutants, sources, and 303(d) listings .� Pollutants of Concern Legacy pollutants as a result of past uses Section IV. Hydrologic Conditions of Concern (in narrative form) Condition A, B, or C. If none, evaluation of impacts to downstream erosion or stream habitat )/ Completed Storm Event surface hydrology table X Section. V. Best Management Practices VI. Site Design BMPs Table 1. Site Design BMPs is complete • Narrative describing all site design BMPs proposed for the project X Explanation for each BMP NOT used and why they cannot be implemented Site Design BMPs shown on the WQMP Site Plan (Appendix B) Page 2 of 4 Revised 03/20/2009 WATER QUALITY MANAGEMENT PLAN • ' CONCEPTUAL ACCEPTANCE CHECKLIST , mot i F �19R9 Item Addressed? CONCEPTUAL WQMP REQUIREMENTS Yes No Not Applicable V3. Treatment Control BMPs Table 3. Treatment Control BMPs is complete X Narrative describing all treatment control BMPs proposed for the project X Narrative describing how each individual treatment control BMP proposed for the project will be implemented and maintained, including locations, sizing criteria, inspection and maintenance frequency, inspection criteria, long -term O &M, and the responsible entity or party Treatment Control BMPs shown on the WQMP Site Plan (Appendix B) ' \ Section VIOperation and Maintenance (O &M) Responsibibty for Treatment Control BMPs':. Completed cost and O &M table BMPs requiring O &M are identified 7 BMP start-up dates X' • Schedule of the frequency of O &M for each BMP Parties responsible for O &M X' Description of water quality monitoring, if required Appendix B Site Plan depicting the following project features: Location and identification of all structural BMPs Landscape areas Hardscape areas x Paved areas Number and type of structures and intended uses. (i.e.: buildings, tenant spaces, dwelling units, community facilities such as pools, recreations facilities, tot lots, etc.) Infrastructure (i.e.: streets, storm drains) X Location of existing and proposed public and private storm drainage facilities including catch basins and other inlet/outlet structures. (Existing and proposed drainage facilities should be clearly differentiated.) '\ Any adjacent receiving waters that the project directly discharges into. x Discharge points where onsite or tributary offsite Bows exit the site. Proposed drainage areas boundaries, including tributary offsite areas, for each BMP • and locations where flows exit the site. (Each drainage area should be clearly, denoted.) Page 3 of 4 Revised 03/20/2009 '� g S�� : ~,� '� �" `°� -� i '` WATER QUALITY MANAGEMENT PLAN ��u� _ � t �'" # � ; CONCEPTUAL ACCEPTANCE CHECKLIST `l � �tt.:19R94'_'s;r. � , Item Addressed? CONCEPTUAL WQMP REQUIREMENTS Yes No Not Applicable Post-projecttopography. Appendix C Sorface Hydrology report Appendix E Property/projecl soils report and percolation test resulGc Appendix F _ . ; . ; ' , Treatment Control BMP sizing calculations and design details Manufacturers specs � (End of Conceptual Acceptance Checklist) � Checklist for Concepmal Acccptancc.doc � Page 4 of 4 Revised 03/20/2009 � �>. � ��fi � � � a'� ��' WATER QUALITY MANAGEMENT PLAN �n a� t�� FINAL ACCEPTANCE CHECKLIST t' i ,., � �:;� r ��'�19R9 � . The purpose of this checklist is to provide a format for uniform, comprehensive, and well-documented reviews of project-specific Water Quality Managemenl Plans (WQMPs) submitted by project owners. The completed checklist should accompany the WQMP and submitted to the Ciry of Temecula. SUMMARY OF WQMP REOUIREMENTS (PLEASE LIST THE FOLLOWING INFORMATION) Section I. Watershed and Sub-Watershed: Santa Margarita River and �� V 0�� . �, I l -� Section IL Land-Use Category (from Initial Checklist): \ US ��) �L �"�h� ��l S � p � � Section iII. Pollutants (expected and potentiaq: �� R.w� / � u f� vIJjUC'y �� N� f� j. �` ( �-. (� • �t M�—�-" �.C.+n '��,v—c�`) ( '`Cs�\ ��C'' YJ�` �J 1I�'W� � ��/��l , , "'% . J v:a, � iJ��Aj , V � �5��— � 1 , 4.S �\ I\ S. Section IV. Exemption Category (A, B, C, or Not F,xempt): SectionV. Treatment BMPCategory(ies): ��`'v��''�� `�w"W � IY1 V��%"H \��c`oo"C.l�'�}, v C� 1�S�lf� �C V� Section VI. Party(ies) responsible for BMP installation and maintenance: �� ' �� Section VIL Funding source(s) for BMP maintenance: ��Y��'� S� NOTES: (a) The WQMP will NOT be accepted unless all of the items requested throughout this checklist are completed. (b) The Riverside County Water Quality Management Plan guideline and template can be downloaded from the City's website. • Page 1 of 5 Revised 03/20/2009 � a � . �`�� "��' WATER QUALITY MANAGEMENT PLAN � ,,,, � .:� • ; _ FINAL ACCEPTANCE CHECKLIST �,�F � ��i 1�.... �.f� ; � ._..�7989:�„ �, �� Not WQMP REQUIREMENT Yes No Applicable Title Pa e _ Name of project with Tract, Parcel, or other I.D. number Owner/Develo er name, address &[ele hone number Consultin /En ineerin � firm, address & hone number Pre arer's Re istered Professiona] En ineers' SLam and Si nature Date WQMP was re ared ,� . . .. . �.:� .. , . Certification Statements Si ned En ineer's certification statement � X 'Si ned and�-notarized Owner's certifica[ion�statement Tatile of Contents Com leted and includes all fi ures, a endices (A-H), and desi� n worksheets � : -,:� . . . . . ,;. �: : � -.� Section I: Pro'ectDescription in narrative form . • Pro�ectlocation X Pro'ect size (lo the nearest l/10 acre) �( Standard Industrial Classification (STC) Code x Description and location of all buildings, proposed activities, locations of these activities, materials and products to be used and stored Cor each activity and at each building, delivery areas, and what kinds of wastes wil] be generated from each building �' and [he en[ire ro'ect Pro'ect watershed and sub-walershed �C� Formation of a Home Owner's Associ�tion or Pro er[ Owner's Association X Additional permits/approvals required for the project including: • State Department of Fish and Game, 1601 Streambed Alteration Agreement; • State Water Resources Control Board, General Conslruction Permit • Regional Board, 401 Waler Quality Certification; � • US Army Corps of Engineers, 404 permit; � • US Fish and Wildlife, Endangered Species Act section 7 biological opinion;. • Munici al, radin and buildin ermi[s. . ,.. _ ,.. .::. . ._. ,. . . . . .. . Section II. Site CBarecterization in narrative form :.. ' ° Land use desi nalion or zonin �� Current and roposed pro ert use �( Soils re ort (A endix E) )( Phase 1 SiLe Assessment or summar of assessment or remediation (A endix H) X Idenafication of Receiving waters (including 303(d) listed waters, Designated � � beneficial uses, and any RARE beneficial use waters) and their existin impairmenls Page 2 of 5 Revised 03/20/2009 IC��-',��' ��N'',�`',�� F� ��ro� ' WATER QUALITY MANAGEMENT PLAN �;�,�;a�� -0" - FINAL ACCEPTANCE CHECKLIST • �� Y �� are �,, � ��-1989 � r Not WQMP REQUIREMENT Yes No Applicable Section IIL Pollutants of Concern (in nar�ative form) Completed table of potential and expected pollutanls, sources, and 303(d) lis�ings �( Pollu�ants of Concern x� Legacy pollutants as a result of past uses � Section 1V. H tlrolo ic Conditions of Cancern in nariative form Condi�ions A, B, or C. X ]f none, evaluation of impacts [o downstream erosion or stream habitat X Completed Storm Evem surface hydrology table Section V. Best ManagementPractices ' ' '' V/. Site Desi n BMPs �� }� �`�' g � � E �' T �e' � ° ��?� q � � �'{: �I:N��R Table 1. Site Design BMPs is complete x' . Narrative describing all site design BMPs proposed for the project k' Explana[io� for each BMP NOT used and why they cannot be implemented � Site Design BMPs shown on the WQMP Sile Plan (Appendix B) � V2.SourceControlBMPs �"a � �� p �"'�'�I �';� 2�m�'�� r:�'�� Table 2. Source Con[rol BMPs is complete X Narrative describing the souroe control BMPs proposed for [he project ,x' Narrative describing the source control BMPs lhat were NOT applicable and why they cannot be implemented X ]nspection and maintenance frequency, inspec�on criteria, and the responsible � entity or party Structural source controls shown on the WQMP Site Plan (Appendix B) � V3. Treatment Control BMPs ��3�� ',��..� ��h"`�'� ;�. dt E�.rea;n Table 3. Treatment Control BMPs is complete ,)( � Namative describing all treatment control BMPs proposed for the project x Narrative describing how each individual treatment control BMP proposed for the project will be implemented and maintained, including locations, sizing criteria, � inspection and mainLenance frequency, inspection criteria, long-term O&M, and Lhe responsible entity or party � Treatment ConLrol BMPs shown on the WQMP Site Plan (Appendix B) X V4. E uiva[ent Treatment ControlAlternatives ��I� �� ' �v �� k f` 4 �-'�.a�6. „- �..�..:v. � �._ . ��'�� Page 3 of 5 Revised 03/20/2009 o �T � �-�� '�� r �� ` WATER QUALITY MANAGEMENT PLAN �� _ • _ � - FINAL ACCEPTANCE CHECKLIST �� i �� 19A9� fl Not WQMP REQUIREMENT Yes No Applicable Narrative describing equivalent Veatment control alternatives � � Calculations for Equivalent TreatmenL Control Alternatives (Appendix F) �(� x VS.Re�ionall�-BasedTreatmen[ControlBMPs �� fii�� '°.�,��i b 1 ��i• �..�:�'�:r'��...,$-4., Narrative describing regionally-based treadnent control BMPs � Calculations for Regionally-Based Treatment Control BMPs (Appendix F) � Section VI.Operation and Maintenance (0&M) Responsibility for T�eatment Cgntrol BMPs Completed cost and O&M table ')( BMPs requiring O&M are identified �( BMP start-up dates X Schedule of the frequancy of O&M for each BMP X Parties responsible for O&M X� � Description of water qualiry monitoring if required �( Section Vlli Funding ' 'Signed funding certificadon statement � _.._ . . .; . . . ... Appendix A (3ection I)� � .a - � � � Signed copy of the final Conditions of Approval S�(�Nj1� �Y W�1 O?� x Appendix B_(Sections 1 and V) . ` °'' ' r Vicinity Map identifying the project site �( Receiving Waters Map � t.� � ",'j� ;_:��::j0�y -. �'Yp,` --�x��:�'� Site Plan depicung the following projeei features: ;' � �: — ,,;;�;; _ _ , ,'::' Location and identification of all stroctura] BMPs. � x' Landscape areas. X Hardscape areas. � Paved areas. X� Number and Lype of struc[ures and intended uses. (ie: buildings, tenant spaces, dwelling units, community facilities such as pools, recrea�ons facilities, tot lots, � etc.). InGasLrucWre (ie: streets, storm drains). x . Page 4 of 5 Revised 03/20/2009 r n �r� . ,e, '�� +�� \ ' Y=�� ,�� ' WATER QUALITY MANAGEMENT PLAN �� g ` FINAL ACCEPTANCE CHECKLIST � � 1988�"'�� +_ Not WQMP REQUIREMENT Yes No Applicable Location of exis�ng and proposed public and private storm drainage faciliues including catch basins and olher inleUootlet structures. (Existing and proposed drainage facilities should be clearly differentiated.) X Any adjacent receiving waters that the project directly or indirec�ly discharges into. x' Discharge points where onsite or tribuLary offsite (lows exit the site. �(' Proposed drainage areas boundaries, including tributary offsite areas, for each x location where (7ows exit the site. (Each tribu[ary area should be clearly denoted.) � Post-project [opography. X� Landscape Plans showing the structural treatmen[ BMPs. � Appendix C (Section IV) " Surface Hydrology repor[ � � X� Appendix D (Section � � Educational materials. Appendix E(Sections II and V) Property/project soils report and percolation test results � Appendix F. (Section � Treatment Control BMP sizing calculalions and design details �( Manufacturers specs X Appendix G(Sections I and Vl) . , CC&Rs, Covenant and Agreements, or other mechanisms used lo ensure the ongoing operation, maintenance, funding, and lransfer of the WQMP requirements X Appendix H '{Section II) Summary of environmental site assessment or remediation, if applicable. � �(' (End of Checklist) � Page 5 of 5 Revised 03/20/2009 • Project Specific Water Quality Management Plan For: Lyndie Lane Dental Office 42210 Lyndie Lane, Temecula, CA 92590 DEVELOPMENT NO. PARCEL 1 OF PARCEL MAP 24169 (BK164/PP67-68) DESIGN REVIEW NO. DESIGN REVIEW NO. PA10-211/LDll-045GR Prepared for: • Bruce Baker, DMD 13422 Pomerado Road Poway, CA 92064-3548 Telephone: 858-717-2929 Prepared by: David A. Ashcroft, PE Engineering Consulting Group 12790 EI Camino Real, Suite 130 San Diego, CA 92130 Telephone: 858-259-4711 WQMP Preparation/Revision Date: May 24th, 2010/September 9th,2011 • Water Quality Management Plan (WQMP) �ynd�e �ane Dental Office � OWNER'S CERTIFICATION This project-specific Water Quality Management Plan (WQMP) has been prepared for: Bruce Baker, DMD by Engineering Consulting Group for the project known as Lyndie Lane Dental Office at 42210 Lyndie Lane, Temecula, CA 92590. This WQMP is intended to comply with the requirements of City of Temecula for PARCEL 1 OF PARCEL MAP 24169 (BK164/PP67-68), which includes the requirement for the preparation and implementation of a project-specific WQMP. The undersigned, while owning the property/project described in the preceding paragraph, shall be responsible for the implementation of this WQMP and will ensure that this WQMP is amended as appropriate to reflect up-to-date conditions on the site. This WQMP will be reviewed with the facility operator, facility supervisors, employees, tenants, maintenance and service contractors, or any other party (or parties) having responsibility for implementing portions of this WQMP. At least one copy of this WQMP will be maintained at the project site or project office in perpetuity. The undersigned is authorized to certify and Co approve implementation of this WQMP. The undersigned is aware that implementation of this WQMP is enforceable under City of Temecula • Water Quality Ordinance (Municipal Code Section 8.28.500). If the undersigned transfers its interest in the subject property/project, its successor in interest the undersigned shall notify the successor in interest of its responsibility to implement this WQMP. "I, the undersigned, certify under penalty of law that the provisions of this WQMP have been reviewed and accepted and thaY the WQMP will be transferred to future successors in interest." � t_ G� - �� p �� / Owner's Signature �- Date � Bruce Baker, DMD Owner's Printed Name Owner's Title/Position 134Z2 Pomerado Road Poway, CA 92064-3548 858-717-2929 • Water Qaality Management Plan (WQMP) �yndie �ane Dental Office � NOTARIZED SIGNATURE SHEET State of Calitomia Counry of�n/ mt �6 � Subscribed and swom ro for a!tirmed) betore me on ihis�� day of�,2o�. oy 7t»-_c 't'�, t� k" proved to me on the basis :n sa:i>iactory evidence to be the person(s) who appearod before me. /' (Seal) Signature �� / �RO6ERT W. KIM ' p Cammission # 1884591 � . Z;-o � Nolary Public - California z _ ' � Szn Diega County D My Comm. Ezpires Mar 29, 2014 J . Water Quality Management Plan (WQMP) �yndie �ane Dental Office • ENGINEER'S CERTIFICATION "I certify under penalty of law that this document and all attachmenls and appendices were prepared under my direction or supervision in accordance with a system designed to ensure thaY qualified personnel properly gather and evaluate the information submitted." ` ` ' i l i / ,/�.: �'� �/��'��l , v : Signature � DaYe . _-- _"'�w -' �� ,.. AS �'� o��; , , i� � f�\ 3 No.4102q °'�� . �p.f��3t // d , � ' ; ;, "�`'%��rlvll. ��P 9 `� f �_ CALIEO� • Water Quality Management Pian (WQMP) �ynaie �ane Dental Office � Contents Section Page I PRO.IECT DESCRIPIION A-1 ❑ SITE Ch1ARACTERIZATION A-5 ❑I POLLUTANTSOFCONCERN A-7 IV HYDROLOGIC CONDITIONS OF CONCGRN A-9 V BF,ST MANAGEMGN'f PIL4CTICES A-IO V.I Site Design BMPs A-10 V.2 Source Control BMPs A-15 V3 I'reatment Control BMPs A-19 V.4 Equivalent Treatment Control Alternatives A-22 V.5 Regionally-Based Treatment Control BMPs A-22 V I OPGRATION AND MAINTENANCB RGSPONSIRILITY FOR TREATMENT CoN ra0� BMPS A-23 V❑ FuNOiNC A-25 • APPENDICES A. CONDITIONS OF APPROVAI. B. Vrc�rr[rv Maa, WQMP SiTF Pi,nN, AND RecEiv�NG WnTeRS Mn� C. SUPPORTING DETAIL RGLA'�L=D'PO HYDRAUI.IC CONDITIONS OF CONCERN (IF APPLICABLH� D. EDUCATIONAL MA"f6RIALS E. SOILS REPORT (IF APPLICABLE) F. TRLA"fMENT CONTROL BMP SIZING CALCULATIONS AND DESIGN DETAILS G. AGREEMGN"fS - CC&RS, COVENANT AND AGREEMENTS AND/OR OTHER MECHANISMS FOR ENSURING ONGOING OPBRATION, MAMTFNANCE, FUNDWG AND TRANSFER OF REQUIREMENTS FOR THIS PROJECT-SPECIFIC WQMP H. PHASE 1 ENVIRONMf>NTAL SITE ASSESSMENT - SUMMARY OF SITE REMEDIATION CONDUCTED AND USG RLS'I RICTIONS • A-i Water Qaality Management Plan (WQMP) Lyndie L D@Ittdl �fflCe � I. Proj ect Description Project Owner: Bruce Baker, DMD 13422 Pomerado Road Poway, CA 92064-3548 Telephone: 858-717-2929 WQMP Preparer: David A. Ashcroft, PE Engineering Consulting Group 12790 EI Camino Real, Suite 130 San Diego, CA 92130 Telephone: 858-259-4711 � � A-1 Water Quality Management Plan (WQMP) �yndie �ane Dentdl OffiCe � Project Site Address: 4Z210 Lyndie Lane Temecula, CA 92590 Planning Area N/A Community Name N/A Development Name: Lyndie Lane Dental Office Building APN Number(s): 921-310-018 Thomas Bros. Map: Page 958, J6, San Bernardino & Riverside Counties 38th Edition 2010 Project Watershed: Santa Margarita River (HA 902) Sub-watershed: Murrieta Creek (HSA 902.32, 902.52) Project Site Size: 34,600 SF (0.794 AC) GROSS, 13,489 SF (0.310 AC) NET (DISTURBED) Standard Industrial Classification (SIC) Code: 8021 Offices and Clinics of Dentists Formation of Home Owners' Association (HOA) or Property Owners Association (POA): Y� N❑ A property owners agreement will be in effect as listed in Appendix G. Additional Permits/Approvals required for the Project � AGENCY Permit required State Department of Fish and Game, 1601 Streambed y� N� Alteration Agreement State Water Resources Control Board, Clean Water Act y� N� (CWA) section 401 Water Quality Certification US Army Corps of Engineers, CWA section 404 permit Y� N� US Fish and Wildlife, Endangered Species Act section 7 y� N� biological opinion Oth2f (p/ease list in the space be%w as �equiredJ y� N� Grading Permit, City of Temecula � A-2 Water Quality Management Plan (WQMP) Lyndie Lane Delltd� �fflC@ • PROJECT DESCRIPTION: This project is to convert an existing free standing 6,206 square foot single story building from a child daycare faciliry to a dental ofFce (2074 SF), an orthodontist space (1856 SF) and a residual space (2276 SF) of similar compatible use. The City of Temecula (CITY) approved unanimously at the December 14, 2010 Council Meeting a zone change from the existing designated zone of High Density Residential (H) to Community Commercial (CC). A vicinity map is included in appendix B showing. There are no new buildings. The existing building is offset 16 feet from the westerly property line and 107 feet from the northerly property line. The existing site has 21 on-site parking spaces and a driveway access to Lyndie Lane and a trash enclosure. The building is set back approximately 131 feet from Lyndie Lane right-of- way. The rear ]07 feet is an existing TOT Lot and playground that will largely be converted to additional vehicular parking. The site will be improved to provide 14 additional vehicle parking stalls at the rear of the existing building. A driveway running along the easterly side of the existing building will also be constructed. Three parking stalls in front of the existing building will be removed to accommodate the new driveway. One parking stall in front of the existing building will be converted to a bicycle rack and motorcycle parking. One parking space in fronti of the existing building and adjacent to the existing disabled curb ramp will be converted to a disabled parking space. This represents a gross area of improvements equal to 10375 SF OR 0.24AC. Site topography should remain unchanged. The existing ground level HVAC units will be moved from the easterly side of the existing building to the westerly side. Total surface improvements will increase the impervious areas by 13 SF. A site plan showing the proposed improvements is included in Appendix B LOCATION OF NEW CONSTRUCTION: The new parking lot will install 14 new parking stalls Iocated in the northerly 100 feet of the parcel and is • accessed by a 17 ft wide drive isle running along the easterly property line and paralleling a 5.4ft wide pedestrian walkway. Construction m the existing parking lot, located in the southerly 140 ft of the parcel, will include a new landscaped island, porous concrete paving to replace 12 parking stalls, and some minor appurtenant improvements to meet code. PROPOSED ACTNITIES: The dental offices will be open five days a week from 8:OOam to S:OOpm. No special material storage is anticipated beyond a conventional dental o�ce practice. Trash will be placed in the secure on-site trash dumpsters for scheduled weekly collection. Bio-waste will be handled by trained employees and disposed of by specialty contractors. SPECIFIC LOCATIONS OF THESE ACTNITIES: The Dental office occupies the front 1,995SF of the building, the Orthodontist office occupies t�he middle 1,796SF and the remaining 2,195SF is currently undefined but anticipated to be of similar usage. LOCATIONS OF MATEWAL STORAGE AREAS: There are no external material storage areas. LOCATIONS OF LOADING AND i_1NI,OADING AREAS: L,oading and unloading will occur in the onsite parking lots at both the front and rear of the existing building. Loading and unloading docks are not proposed. ACTNITY-SPECIFIC WASTES TO BE GENERATED FROM THE NEW . CONSTRUCTION: A-3 Water Quality Management Plan (WQMP) Lyndie Lane D@nta� OfflCe � • Sediment/Turbidiry • Nutrients • Organic Compounds • Trash & Debris • Oxygen Demanding Substances • Bacteria & Viruses • Oil & Grease • Pesticides • Metals � � A-4 Water Quality Management Plan (WQMP) �yr,d�e �ar,e Dental Office � II. Site Characterization Ldlld US2 De51gC1dtI01l 01' ZOfllflg: High Density Residential to Communify Commercial CUfreflt PrOpel"ty U52: Childrens Kinder Care Facility PI'OpOSed PfOpel'ly U58: Dental Practice/Orthodontal Practice AVBI�Bbl�lry Of SOIIS Rep01't: Y� N❑ Nole: A soils report is reguired tf infiltrntion BMPs are utili�ed. A limited Geotechnical Evaluation with Percolation Testing Results is included in Appendix E. PhdSe 1 SIt2 AS525Sfllellt: Y❑ N� Note: If prepared, attached remediation sumn�ary and use restrictions in Appendix K • [nstruclions: On the following page, list in order of upstream to downstream, the receiving waters that the project is tributary to. Continue to fill each row with the receiving water's 303(d) listed impairments, designated beneficial uses, and proximity, if any, to a RARE beneficial use. Receiving Waters for Urban Runoff from Site Receiving 303(d) List Impairments Designated Beneficial Proximity to RARE Waters Uses Beneficial Use Empire Creek None per the 2006 list Not listed Immediately adjacent a rox 400ft MUN, AGR, IND, PROC, Murrieta Creek Phosphorous, Nitrogen, Iron, GWR, RECl, REC2, WARM, 1.2 miles (by flowline) (HSA 2.32, 2.52) Manganese WILD Santa Margarita MUN, AGR, IND, RECl, River (Upper phosphorous REC2, WARM, COLD, WILD, 3.5 miles (by flowline) Portion 2.22, RARE 2.21 Santa Margarita MUN, AGR, IND, PROC, • River (Lower None RECl, REC2, WARM, COLD, 18.5 miles (by flowline) Portion 2.13, WILD, RARE 2.12 2.11 Santa Margarita Eutrophic RECl, REC2, EST, WILD, Zg.S miles (by flowline) La oon 2.11 RARE MAR MIGR, SPWN A-5 Water Quality Management Plan (WQMP) Lyndie Lane Dental Office Receiving 303(d) List Impairments Designated Beneficial Proximity to RARE Waters Uses Beneficial Use IND, NAV, REC1, REC2, Pacific Ocean None COMM, BIOL, WILD, RARE, 31 miles (by flowline) MAR, AQUA, MIGR, SPWN, SHELL • • A -6 Water Quality Management Plan (WQMP) �yndie �ane Dental Office � IIL Pollutants of Concern Potential pollutants associated with Urban Runoff from the proposed project must be identified. Exhibit B of the WQMP provides brief descriptions of typical pollutants associated with Urban Runoff and a table that associates typical potential pollutants with types of development (land use). It should be noted that at the Co- Permittees discretion, fhe Co-Permittees may also accept updated studies from the California Association of Stormwater Quality Agencies (CASQA), USEPA, SWRCB and/or other commonly accepted agencies/associations acceptable to the Co-Permittee for determination of Pollutants of Concern associated with given land use. Additionally, in identifying Pollutants of Concern, the presence of legacy pesticides, nutrients, or hazardous substances in the site's soils as a result of past uses and their potential for exposure to Urban Runoff must be addressed in project-specifc WQMPs. The Co-Permittee may also require specife pollutants commonly associated with urban runoff to be addressed based on known problems in the watershed. The list of potential Urban Runoff pollutants identified for the project must be compared with the pollutants identified as causing an impairment of Receiving Waters, if any. To identiFy pollutants impairing proximate Receiving Waters, each project proponent preparing a project-specific WQMP shall, at a minimum, do the following: l. For each of the proposed project discharge points, identify the proximate Receiving Water for each discharge point, using hydrologic unit basin numbers as identified in the most recent version of the Water Quality Control Plan for the Santa Ana River Basin or the San Diego Region. 2. Identify each proximate identified above that is listed on the most recent list of Clean Water Act Section 303(d) list of impaired water bodies, which can be found at website � www.swrcb.ca.gov/t�ndl/303d_lists.html. List all pollutants for which the proximate Receiving Waters are impaired. 3. Compare the Iist of pollutants for which the proximate Receiving Waters are impaired with the pollufants expected to be generated by the project. Urban Runoff Pollutants: Sediment/Turbidiry, Nutrients, Organic Compounds, Trash and Debris, Oxygen demanding substances, Oil and Grease, Pesticides, Metals Item #1: Addressed in section II'�Receiving Waters Table" Item #2: Addressed in section II "Receiving Waters Table" Item #3: 'Parking Lots' will be used as the pollutant category for this WQMP. As such, the pollutants associated with parking lots are listed below. � �-�POLLUTANTS � �,� I?OTENTtAL SOURCE 303 (d) LTSfTNG. ; ! a�+s. c l� ",��,�,nR �, r*t�'��k,�Ga�Brr�"'�- f E E��rs � E°�„#. y moi r � r� n 4r -� i � �a xm �: mv�'m.,v� t . iA"�-r'- [.K�Ep, '"a �_ � f xa..,i'"' NEld.� R v� ._s.., .�k.�a�?.r d r� ' 2� � n �' � � � �X�eCC�(�j� ; Y'r� �`� �F r ��Pq�811t1d�� '�� a au = �' : � � i .�, : � � r . � , . ._ c. : .- �'{i.... ,..�. .. � . � :: �. i..' _ � , e .,, ,.,��... �.� � �:�::� .::_.... ....:.:_.. . ..� ... .. .:: . .....:::..... . . a. �� ` .: . Sediment/Turbidity Landscape No • Nutrients Landscape Yes A-7 Water QualiTy Management Plan (WQMP) �ynd�e �ane Dental Office • �POLLUTANTS ` PDTENTIA� SOURCE.: 3D3(d�LISTING : �.,,:, ,.. . ' , �x " PotentEal°' " ' ` ' .. ' ' t � .�.. i� 3 ffN_... : r .; : .: ...... u.._ �+..� �. _ . __. .':: � s `�,_Rt�:i: r..rv-�+o-..:u,v,_!�t':! dJ!_4kv�?.S#!} �5l9f war v fi!!E_;!� � '+,... _.. �:. __m... . . _ ': ,. .... m . ':.. '::: Organic Compounds Parking Lot No (Hydrocarbons) Trash & Debris Parking Lot No Oxygen Demanding Landscape No Substances Baderia & Viruses Parking Lot No Oil & Grease Parking Lot No Pesticides Landscape No Metals Parking Lot Yes Project Discharge Points: Northwesterly discharge to MS4 = 40% site runoff • Southeasterly discharge to MS4 = 60% site runoff Both discharge points empty onto Lyndie Lane and then into the City's Storm Drain System and finally into Empire Creek Pollutants of Concern: Murrieta Creek is listed on the 2006 Clean Water Act Section 303(d) List of Water Quality Limited Segments as being impaired by Phosphorus, Nitrogen, Iron, and Manganese. As such, these pollutants are the Pollutants of Concern for this project. Legacy Pollutants: The site was used for a period of approximately 15 years as a Kinder Care facility. Prior to that use the parcel was undeveloped. An environmental site assessment is unavailable at this time. Legacy pollutants are not anticipated at this site. . A-8 Water Quality Management Plan (WQMP) �yndie �ane Dentdl OffiCe � IV. Hydrologic Conditions of Concern This project-specific WQMP must address the issue of Hydrologic Conditions of Concern unless one of the following conditions is met: ■ Condifion A: Runoff from the Project is discharged directly to a publicly-owned, operated and maintained MS4; the discharge is in full compliance with Co-Permittee requirements for connections and discharges to Yhe MS4 (including both quality and quantity requirements); the discharge would not significantly impact stream habitat in proximate Receiving Waters; and the discharge is authorized by the Co-Permittee. ■ Condifion B: The project disturbs less than 1 acre. The disturbed area calculation should include all disturbances associated with larger plans of development. ■ Condition C: The project's runoff flow rate, volume, velocity and duration for the post-development condition do not exceed the pre-development condition for the 2-year, 24-hour and 10-year 24-hour rainfall events. This condition can be achieved by minimizing impervious area on a site and incorporating other site-design concepts that mimic pre-development conditions. This condition must be substantiated by hydrologic modeling methods acceptable to the Co-Permirtee. This Project meets the following condition: Condition B Supporting engineering studies, calculations, and reports are included in Appendix C. n �� p �` r , S 1(7RM EU��N`Y` ' � 3 • � � � � ._� � � �{ .' L � #�'��,� t '. 1 "� . . p ft � � ��.1 �4 �' i � '4 : � �+s�2 1'�"AR; 34 ,HOUR � � ' � r��l4Y�AR, 2�1� IOT7�R � �'� � 73'140 XE,4R�'�4 t " � J�'}r � �' L ( S 4�3' �+ , gy ranw�' L t C ' r��'- �L.u"'�n ti E �" u3rd'�r� IrSJ�.t.i�38�va�� Aw':� �e $�3c'�. m.� .��' � : � � ��,�.,�'�p� `��Post s,�� re� °�"� �+ �Post � �� Pre �� Post � .�,� �5 � i�{�G -� ca € idh+�. . d4Y 1, .w y�k'� i.�k � � �Z �a �! � P i u :.�� development de,yelopmen�p �development� dev,elqrpment �d@velopm�nt� developmenc . � �..a,° ...... _ t ...... '� � ....:.:........ m......_.n...�... . . .....�.�_.. ...�. 3 m ,....:, ...::.: Q 1.496 1.558 2.186 2252 3.43 3.407 (cfs) Velocity 534 539 5.87 6.08 6.57 6.56 (ff/sec) Volume Z.967 3.090 4336 4.467 6.803 6.755 (acre-feet) Duration �440 1440 1440 1440 1440 1440 (minutes) � A-9 Water Quality Management Plan (WQMP) Lyndie Lane Dental Office • V. Best Management Practices V.1 SITE DESIGN BMPs Project proponents shall implement Site Design concepts that achieve each of the following: 1) Minimize Urban Runoff 2) Minimize Impervious Footprint 3) Conserve Natural Areas 4) Minimize Directly Connected Impervious Areas (DCIAs) The project proponent should identify the specific BMPs implemented to achieve each Site Design concept and provide a brief explanation for those Site Design concepts considered not applicable. Instructions: In field below, provide narrative describing which site design concepts were incorporated into project plans. If the project proponent implements a Co- Permittee approved alternative or equally - effective Site Design BMP not specifically described below, the Site Design BMP checkbox in Table 1 should be marked and an additional description indicating the nature of the BMP and how it addresses the Site Design concept should be provided. Continue with completion of Table I. • Note: The Co- Permittees general plan or other land use regulations /documents may require several measures that are effectively site design BMPs (such as minimization of directly connected impervious areas and/or setbacks from natural stream courses). The Project Proponent should work with Co- Permittee staff to determine if those requirements may be interpreted as site design BMPs for use in this table/narrative. See Section 4.5. l of the WQMP for additional guidance on Site Design BMPs. Following Table 1: if a particular Site Design BMP concept is found to be not applicable, please provide a brief explanation as to why the concept cannot be implemented. Also include descriptions explaining how each included BMP will be implemented. In those areas where Site Design BMPs require ongoing maintenance, the inspection and maintenance frequency, the inspection criteria, and the entity or party responsible for implementation, maintenance, and/or inspection shall be described. The location of each Site Design BMP must also be shown on the WQMP Site Plan included in Appendix B. This project increased the permeable area of the project site by increasing landscaping by 6% of total site area and by introducing 3221 SF porous concrete pavement as a structural BMP. Overflow has been routed through filtration /treatment systems by Clearwater Solutions prior to entering MS4 facilities. Porous concrete areas have incorporated ponding to a depth not to exceed 1.0 inch to encourage infiltration. The existing condition of this site was a fully developed childcare facility. The new use will be for dental offices and requires only the reconfiguration of on -site parking. Only minimal grading is proposed and, for the most part, all existing conditions will remain the same. This prevents a proposed broader application of low impact development concepts from being implemented at this site. • A -10 Water Quality Management Plan (WQMP) Lyndie Lane Dental Office • Table 1. Site Design BMPs Included Design Technique Specific BMP Yes No N/A Concept Maximize the permeable area (See Section 4.5.1 of the ® ❑ ❑ WQMP). Incorporate:landscaped buffer areas between sidewalks ® ❑ ❑ and streets. `. Maximize canopy interception and water conservation by Q preserving existing native trees and shrubs, and planting ® ❑ ❑ c Minimize additional native or drought tolerant trees and large o shrubs. c Urban Use natural drainage systems. ® ❑ ❑ O Where soils conditions are suitable, use perforated pipe ® ❑ ❑ Runoff or gravel filtration pits for low flow infiltration. .o Construct onsite ponding areas or retention facilities to rn increase opportunities for infiltration consistent with ® ❑ ❑ vector control objectives. Other comparable and equally effective site design • concepts as approved by the Co- Permittee (Note: ❑ ® ❑ Additional narrative required to describe BMP and how it addresses Site Design concept). A-11 Water Quality Management Plan (WQMP) �yndie �ane Dental Office � Table 1. Site Design BMPs (Cont) Included Design Technique Specific BMP Yes No N/A Concept Maximize the permeable area (See Section 4.5.� of the � � � WQMP Construct walkways, trails, patios, overtlow parking N lots, alleys, driveways, low-traffic streets and other low Q -traffic areas with open-jointed paving materials or � ❑ ❑ d permeable surtaces, such as pervious concrete, � Minimize o porous asphalt, unit pavers, and granular materials. V Construct streets, sidewalks and parking lot aisles to c Impervious � the minimum widths necessary, provided that public y safety and a walk able environment for pedestrians are � � � 0 Footprint not compromised. d .. y Reduce widths of street where off-street parking is � � � available. Minimize the use of impervious surtaces, such as � � � decorative concrete, in the landscape design. Other comparable and equally effective site design • concepts as approved by the Co-Permittee (Note: � � � Additional narrative required describing BMP and how "� it addresses Site Desi n conce t. .., � Conserve natural areas (See WQMP Section 4.5.1). ❑ ❑ � Conserve V Maximize canopy interception and water conservation � by preserving existing native trees and shrubs, and � � � � Natural planting additional native or drought tolerant trees and � large shrubs. 0 y Areas Use natural drainage systems. ❑ ❑ � w 'y Other comparable and equally effective site design concepts as approved by the Co-Permittee (Note: � � � Additional narrative required describing BMP and how it addresses Site Desi n conce t. • A-12 Water Quality Management Plan (WQMP) Lyndie Lane Dental Office 0 Table 1. Site Design BMPs (Cont.) Included Design Technique Specific BMP Yes No N/A Concept Residential and commercial sites must be designed to contain and infiltrate roof runoff, or direct roof runoff to ® ❑ ❑ vegetative swales or buffer areas, where feasible. Where landscaping is proposed, drain impervious sidewalks, walkways, trails, and patios into adjacent ❑ ❑ landscaping. Increase the use of vegetated drainage swales in lieu ❑ ❑ of underground piping or imperviously lined swales. Rural swale system: street sheet flows to vegetated swale or gravel shoulder, curbs at street corners, ❑ ❑ culverts under driveways and street crossings. Minimize Urban curb /swale system: street slopes to curb; v periodic swale inlets drain to vegetated swale /biofilter. ❑ ❑ m Directly Dual drainage system: First flush captured in street o catch basins and discharged to adjacent ve ® ❑ ❑ U Connected swale or gravel shoulder, high flows connect directly to MS4s. • p3 Design driveways with shared access, flared (single co Impervious lane at street) or wheel strips (paving only under tires); ❑ ❑ p or, drain into landscaping prior to discharging to the El 2 MS4. h Areas Uncovered temporary or guest parking on private residential lots may be paved with a permeable ® ❑ ❑ (DC /As) surface, or designed to drain into landscaping prior to discharging to the MS4. Where landscaping is proposed in parking areas, ❑ ❑ incorporate landscape areas into the drainage design. Overflow parking (parking stalls provided in excess of the Co- Permittee's minimum parking requirements) ® ❑ ❑ may be constructed with permeable paving. Other comparable and equally effective design concepts as approved by the Co- Permittee (Note: ❑ ® ❑ Additional narrative required describing BMP and how it addresses Site Design concept). Non - applicable Site Design BMPs: Site Design Concept 2: The streets are already fully developed. Reducing the width of the street is not feasible. Site Design Concept 3: There are no natural areas on the project to conserve. • Site Design Concept 4: The site grades are already developed. This project is a minor modification to a fully developed site. It is not feasible to route runoff from existing impervious areas to landscaping. The A -13 Water Quality Management Plan (WQMP) Lyndie Lane Dental Office • scope of proposed construction does not facilitate the use of vegetated swales in lieu of underground piping. Underground piping has only been utilized to collect treated runoff and direct it to the MS4, as well as prevent further erosion of the northerly slope and remedy an existing safety hazard. No work is proposed in the street, so a curb /swale system is not feasible. The driveway to the street is an existing condition and no opportunity exists for shared access. Additional landscaping has been introduced into the northerly parking area but the existing landscaping and topography makes incorporation into the drainage system unfeasible. Project Site Desiin BMPs: Permeable surfaces have been introduced in the redeveloped portion of the site to the maximum extent feasible. A large landscaped area in the northerly quadrant of the site has been introduced to replace a previously impervious area, and 21 of the 31 parking stalls will have porous concrete pavement. The drainage system of the site is limited to the existing onsite drainage pattern. Ponding has been designed into the porous pavement design to maximize infiltration. The new parking lot and its access driveway have been constructed to the minimum widths necessary to provide a safe trafficable environment for both pedestrians and vehicles. No impervious surfaces are proposed in the existing landscape areas. Trees on the project site have been preserved wherever feasible and roof runoff will be directed to landscaped areas and to the porous concrete stalls. The drainage system has been designed to capture and direct low flow and first flush flows to each BMP. • • A -14 Water Quality Management Plan (WQMP) Lyndie Lane Dental Office III V.2 SOURCE CONTROL BMPs Table 2. Source Control BMPs Check One If not applicable, state BMP Name Included Applicable brief reason ;a:x .... a ac a ; a�.6 �r., i�su q e -jai .I�3 ' "d eta r r .. v �,� x* �,; _ . MAW I� I �'' • , r NonstrueturalSourc raiiiroireinT _ ,a t telf.,� �„ anal m� m +� ,. ;: Y.h ae' f�„ = ...t,ta Education for Property Owners, Operators, Tenants, Occupants, ® ❑ or Employees Activity Restrictions ® ❑ Irrigation System and Landscape Maintenance ® ❑ Common Area Litter Control ® ❑ Street Sweeping Private Streets and Parking Lots ® ❑ Drainage Facility Inspection and Maintenance ® ❑ .,.. ,�.. ,,,, i i+' kd is E a� aa+?t"wi�a�y3P'urr "t I nary t .�a iny p s a vtl v ki # a s a +StiucturaliSoutce`Control.BMPs� .,�;` vF. �. �G� �,,., �, a,. �,,, Bax� ,��i�°��J.,_�_.,a��a��J.,,,r ,�,,R��,avv.ns�°�w,� a'iir'„�a,.,7�. MS4 Stenciling and Signage ® ❑ Landscape and Irrigation System Design ❑ ® EXISTING Protect Slopes and Channels ® ❑ Provide CommunitLCar Wash Racks ❑ ® NOT A PART OF PROJECT Properly Design: ❑ ® NOT A PART OF PROJECT Fueling Areas ❑ ® NOT A PART OF PROJECT Air/Water Supply Area Drainage ❑ ® NOT A PART OF PROJECT Trash Storage Areas ® ❑ Existing Loading Docks ❑ ® NOT A PART OF PROJECT Maintenance Bays ❑ ® NOT A PART OF PROJECT Vehicle and Equipment Wash Areas ❑ ® NOT A PART OF PROJECT Outdoor Material Storage Areas ❑ ® NOT A PART OF PROJECT Outdoor Work Areas or Processing Areas ❑ ® NOT A PART OF PROJECT Provide Wash Water Controls for Food Preparation Areas ❑ ® NOT A PART OF PROJECT V.2.1 Educational Materials Educational materials are included as part of this WQMP and by the underlying certification and ordinance will be distributed in perpetuity to all affected parties. Appendix D includes copies of the educational materials that will be used in implementing this project - specific WQMP. V.2.2 Activity Restrictions The following activities will be prohibited, restricted or controlled as so designated: • Washing, maintenance or repair of automobiles will be prohibited on the project premises at all times • Fueling of equipment or vehicles will be prohibited on the project premises at all times • Food preparation will be a prohibited activity on the project premises except for an typical office kitchen • Dumpsters will be kept in designated areas and access restricted to tenants only. III • Outdoor material storage will be prohibited on the premises at all times A -15 Water Quality Management Plan (WQMP) Lyndie Lane Dental Office • • Outdoor work areas or processing areas will be prohibited on the premises at all times. V.2.3 Irrigation System and Landscape Maintenance Landscape Maintenance shall adhere to the following guidelines: • Mowing Trimming and Planting shall be as prescribed in Appendix D SC -4I "Building and Grounds Maintenance" • Fertilizer and Pesticide Management shall be as prescribed in Appendix D SC -41 "Building and Grounds Maintenance" • Replace dead vegetation and repair effects of erosion immediately upon detection. • A qualified landscape contractor shall be retained to maintain the grounds and irrigation system. The contractor shall review conditions on a weekly basis and act expediently to effect maintenance and repair activities. • implement efficient irrigation practices as prescribed in Appendix D SD -12 "Efficient Irrigation" V.2.4 Common Area Litter Control Trash receptacles will be provided in the common areas adjacent to each facility point of ingress and egress. The property owner must contract with ajanitorial service and have collection from the common area receptacles to the trash enclosures included in the janitorial scope of services. Collection must be on a weekly cycle at a minimum. • V.2.5 Street Sweeping Private Streets and Parking Lots Maintain the on -site parking lot as prescribed in Appendix D SC -43 "Parking /Storage Area Maintenance ". Specifically perform the following maintenance activities: • Sweep the parking lot and collect any trash or debris in or around the on -site parking lot once every three months at a minimum. Remove all collected waste from the site and dispose of at an approved waste collection facility. • Remove and clean up accumulated grease and oil immediately. The techniques used shall be prescribed in Appendix D SC -43 "Parking /Storage Area Maintenance ". • Repair damaged or cracked pavement surfaces immediately. Surface repair techniques shall be prescribed in Appendix D SC -43 "Parking /Storage Area Maintenance ". • Resurface the entire parking lot surface at ten year intervals in accordance with Appendix D SC- 43 "Parking /Storage Area Maintenance ". V.2.6 Drainage Facility Inspection and Maintenance Once a year perform the following inspection and maintenance activities on the drainage system: • Check the perimeter ribbon gutter for obstructions and remove accordingly. Verify the structural integrity of the gutter and repair defects immediately. • Check the condition of the drain inserts at the outlets (3) to the ribbon gutter. Replace as needed. V.2.7 MS4 Stenciling and Signage • Stencil the outlet points (3) from the ribbon gutter with graphical icons to discourage illegal dumping. A -16 Water Quality Management Plan (WQMP) Lyndie Lane Dental Office • • The property owner shall be responsible for maintaining the legibility of stencils and signs. V.2.8 Properly Design Trash Storage Areas On -site trash container areas shall meet the following requirements: 1. Paved with an impervious surface, designed not to allow run -on from adjoining areas, designed to divert drainage from adjoining roofs and pavements diverted around the area, screened or walled to prevent off -site transport of trash. 2. Trash dumpsters (containers) shall be leak proof and have attached covers or lids. The following table lists the specific frequency and responsible party for the previously listed source control BMP's Ina i rekidr n � !. isr ° x ' � t , v °F*evi .l""ts*d �pwu�.�c mar i A IVIT a SP €CLF£�CIEREQUp'NC Y �r�„ � RI SP{3NSII3I;E PA2 Y m • je a �Ri' : tR %fl $ �'b nurhS t ,+' '° .� t , r. •r ,.. •APIM uetural So ce Conti o ts „ 4 .Srra rr ' 1/4.1 r r Provided at occupancy, within three Education months for new hires, and annually Bruce B. Baker Enterprise, Inc. for existing employees Activity Restrictions Daily Bruce B. Baker Enterprise, Inc Landscape Maintenance Bi- weekly Bruce B. Baker Enterprise, Inc • Litter Control Daily Bruce B. Baker Enterprise, Inc Parking Lot /Street Sweeping Monthly Bruce B. Baker Enterprise, Inc Drainage Inspection and Monthly Bruce B. Baker Enterprise, Inc Maintenance � t , 1 , S ta'u ntt:tSour a ,t erL, Stenciling and Signage Bi- annually Bruce B. Baker Enterprise, Inc Irrigation System Maintenance Same as landscape maintenance Bruce B. Baker Enterprise, Inc Slopes and Channels Same as landscape maintenance Bruce B. Baker Enterprise, Inc Trash Storage Areas Daily Bruce B. Baker Enterprise, Inc • A -17 Water Quality Management Plan (WQMP) Lyndie Lane Dental Office • V.3 TREATMENT CONTROL BMPs Instructions: 1. Provide narrative below describing each Treatment Control BMP. Include location, identj the sizing criteria [i.e., Urban Runoff quality design flow (QBMP) or the Urban Runoff quality design volume (YBMP), preliminary design calculations, for sizing BMPs, maintenance procedures, and the frequency of maintenance procedures necessary to sustain BMP effectiveness. The location of each Treatment Control BMP must also be shown on the Site Plan included in Appendix B. 2. Complete Table 3: Treatment Control BMP Selection Matrix Directions for completing Table 3: ♦ For each pollutant of concern enter 'yes" if identified using Exhibit 8 (Riverside County WQMP - General Categories of Pollutants of Concern per the instructions specified in Section Ill of this Template), or "no" if not identified for the project. ♦ Check the boxes of selected BMPs that will be implemented for the project to address each pollutant of concern from the project as identified using Exhibit B. Treatment Control BMPs must be selected and installed with respect to identified pollutant characteristics and concentrations that will be discharged from the site. ♦ For any identified pollutants of concern not listed in the Treatment Control BMP Selection Matrix, provide an explanation (in space below) of how they will be addressed by Treatment Control BMPs. 3. In addition to completing Table 3, provide detailed descriptions on the location, implementation, installation, and • long -term O &M of planned Treatment Control BMPs. For identified pollutants of concern that are causing an impairment in receiving waters, the project WQMP shall incorporate one or more Treatment Control BMPs of medium or high effectiveness in reducing those pollutants. It is the responsibility of the project proponent to demonstrate, and document in the project WQMP, that all pollutants of concern will be fully addressed. The Agency may require information beyond the minimum requirements of this WQMP to demonstrate that adequate pollutant treatment is being accomplished. Supporting engineering calculations for QBM/, and/or VHMZ, and Treatment Control BMP design details are included in Appendix F. Note: Projects that will utilize infiltration -based Treatment Control BMPs (e.g., Infiltration Basins, Infiltration Trenches, And Porous Pavement) must include a copy of the property /project soils report as Appendix E to the project- specific WQMP. The selection of a Treatment Control BMP (or BMPs) for the project must specifically consider the effectiveness of the Treatment Control BMP for pollutants identified as causing an impairment of Receiving Waters to which the project will discharge Urban Runoff. POROUS CONCRETE PAVEMENT: Install porous concrete pavement in 21 of the parking stalls of the new parking areas; nine (9) stalls in the rear parking area and twelve (12) stalls in the front parking area. The pavement will have a total section depth of 17 inches. A detail of the pavement section is shown in Appendix F. CB INSERT FiLTER: Drain inserts will be installed at the two outlet points. These devices provide mechanical screening, settling and filtration with oil & grease treatment (BMP - 01 & BMP -04) by Clearwater. This is a retrofit application. Details of these • devices are included in Appendix F and educational materials are included in Appendix "D" Profiles and details of all drainage and BMP facilities are included in the attached site plan. A -19 Water Quality Management Plan (WQ1 , Lyndie Lane Dental Office Table 3: Treatment Control BMP Selection Matrix (1) Treatment Control BMP Categories Infiltration Basins, Sand Veg. Swale & Detention Infiltration Wet Ponds Water Hydrodynamic Manufactured Filter or Veg. Filter 4 Trenches, & Porous or Quality Separator / Proprietary Inlets S y stems Devices Pollutant of Concern Strips Basins () Wetlands (6) Media (7) (8) Pavement (5) Filters H/M Sediment/Turbidity H/M M H/M H/M H/M L (L for turbidity) U Y ❑ N ® ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Nutrients L M H/M H/M L/M L L U Y® N❑ ❑ ❑ ® ❑ ❑ ® ❑ ❑ Organic Compounds U U U U H/M L L U Y N ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Trash & Debris L M U U H/M M H/M U y N® ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Oxygen Demanding Substances L M H/M H/M H/M L L U Y❑ NZ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Bacteria & Viruses U U H/M U H/M L L U Y❑ N® ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Oils & Grease H/M M U U H/M M L/M U Y N® ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Pesticides (non -soil bound) U U U U U L L U y N® ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Metals H/M M H H H L L U Y® N❑ ❑ ❑ ® ❑ ❑ ® ❑ ❑ A -20 Water Quality Management Plan (WQMP) Lyndie Lane Dental Office 1 Abbreviations: L: Low removal efficiency H /M: High or medium removal efficiency U: Unknown removal efficiency Notes: (1) Periodic performance assessment and updating of the guidance provided by this table may be necessary. (2) Project applicants should base BMP designs on the Riverside County Stormwater Quality Best Management Practice Design Handbook. However, project applicants may also wish to reference the California Stormwater BMP Handbook — New Development and Redevelopment (www.cabmphandbooks.com). The Handbook contains additional information on BMP operation and maintenance. (3) Includes grass swales, grass strips, wetland vegetation swales, and bioretention. (4) Includes extended /dry detention basins with grass lining and extended /dry detention basins with impervious lining. Effectiveness based upon minimum 36 -48 -hour drawdown time. (5) Projects that will utilize infiltration -based Treatment Control BMPs (e.g., Infiltration Basins, Infiltration Trenches, Porous Pavement, etc.) must include a copy of the property /project soils report as Appendix E to the project - specific WQMP. The selection of a Treatment Control BMP (or BMPs) for the project must specifically consider the effectiveness of the Treatment Control BMP for pollutants identified as causing an impairment of Receiving Waters to which the project will discharge Urban Runoff. (6) Includes permanent pool wet ponds and constructed wetlands. (7) Also known as hydrodynamic devices, baffle boxes, swirl concentrators, or cyclone separators. (8) Includes proprietary stormwater treatment devices as listed in the CASQA Stormwater Best Management Practices Handbooks, other stormwater treatment BMPs not specifically listed in this WQMP, or newly developed /emerging stormwater treatment technologies. • A -21 Water Quality Management Plan (WQMP) Lyndie Lane Dental Office • V.4 EQUIVALENT TREATMENT CONTROL ALTERNATIVES Not applicable V.5 REGIONALLY -BASED TREATMENT CONTROL BMPs Not applicable • • A -22 Water Quality Management Plan (WQMP) Lyndie Lane Dental Office • VI. Operation and Maintenance Responsibility for Treatment Control BMPs Operation and maintenance (O &M) requirements for all structural Source Control and Treatment Control BMPs shall be identified in the project - specific WQMP. The project - specific WQMP shall address the following: • Identification of each BMP that requires O &M. • Thorough description of O &M activities, the O &M process, and the handling and placement of any wastes. • BMP start -up dates. • Schedule of the frequency of O &M for each BMP. • Identification of the parties (name, address, and telephone number) responsible for O &M, including a written agreement with the entities responsible for O &M. This agreement can take the form of a Covenant and Agreement recorded by the Project Proponent with the County Recorder, HOA or POA CC &Rs, formation of a maintenance district or assessment district or other instrument sufficient to guarantee perpetual O &M. The preparer of this project - specific WQMP should carefully review Section 4.6 of the WQMP prior to completing this section of the project - specific WQMP. • Self- inspections and record - keeping requirements for BMPs (review local specific requirements regarding self - inspections and /or annual reporting), including identification of responsible parties for • inspection and record- keeping. • Thorough descriptions of water quality monitoring, if required by the Co- Permittee. instructions: 'dentin below all operations and maintenance requirements, as described above, for each structural BMP. Where a public agency is identified as the funding source and responsible party for a Treatment Control BMP, a copy of the written agreement stating the public agency's acceptance of these responsibilities must be provided in Appendix G. Operation and maintenance (O &M) requirements for all structural Source Control and Treatment Control BMPs shall be as follows: VI.1 Irrigation system O &M Description of Activities: Inspect all irrigation system components for proper operation. Start up Date: Upon occupancy of premises Frequency of O &M: Inspection shall be weekly. Repairs and adjustments shall be immediate and as otherwise required. Responsible Parties: Owner as described in owner's certification VI.2 Landscaping O &M Description of Activities: Mowing Trimming and Planting Start up Date: Upon occupancy of premises • Frequency of O &M: Planting shall be seasonal and as required to replace dead or damaged items. Mowing shall be weekly A -23 Water Quality Management Plan (WQMP) Lyndie Lane Dental Office 1 Responsible Parties: Owner as described in owner's certification VI.3 Common Area Litter Control O &M Description of Activities: Trash receptacle collection and conveyance to trash storage facility. Start up Date: Upon occupancy of premises Frequency of O &M: Trash collection shall occur weekly at a minimum. Responsible Parties: Owner as described in owner's certification VI.4 Parking Lot O &M Description of Activities: Parking lot sweeping, remove accumulated grease and oil, repair damaged or cracked pavement, resurfacing of entire parking lot. Start up Date: Upon occupancy of premises Frequency of O &M: Parking lot sweeping shall occur once every three months; grease and oil accumulation shall be done immediately as required; damaged or cracked pavement shall be repairs immediately as required; resurfacing of the parking lot pavement shall be done once every ten years. Responsible Parties: Owner as described in owner's certification VI.5 Drainage Facility O &M Description of Activities: Inspect, clean and repair ribbon gutter and drain inserts. Start up Date: Upon occupancy of premises Frequency of O &M: Once per year at he beginning of October. Responsible Parties: Owner as described in owner's certification VI.6 MS4 Stenciling and Signage O &M Description of Activities: Inspect and repair or replace MS4 stenciling Start up Date: Upon occupancy of premises Frequency of O &M: Once per year at the beginning of October Responsible Parties: Owner as described in owner's certification S • J ' ' 9 7 1 5" > : � , c ; _ t " k a`= , ; 08cN1 Res onstbit R s onstote Stnt ' u y ttal et5� A QBF1} Frequency a P ~ rt pair tram knra ,knh Quantit Gap a Tg, ,Start U. FundtngParty Fu n d ing IR Treattnent '� Br 1 f° � as e a t o (vl'' n4 , 5T r M a.�- //$} o a es " - o for -fo L o ng , MPS s #" e 4 It .'�cO • z '. mont6lyf � ati -e�x .- . ei , eansta1latton TermO8LM � '= ..�.gUai:ferl. }-} . ,P�tGh�'?l�aE;bk'� �''9 �." Porous 21 x9X 18 — 12,884 800 Prior to Quarterly (see Property Property Pavement 3221. SF Occupancy VI.3) Owner Owner (Rear Parking Lot) Drainage 2 2000 400 Prior to Quarterly (see Property Property Inserts Occupancy VI.3) Owner Owner • A -24 Water Quality Management Plan (WQMP) Lyndie Lane Dental Office VII. Funding A funding source or sources for the O &M of each Treatment Control BMP identified in the project - specific WQMP must be identified. By certifying the project- specific WQMP, the Project applicant is certifying that the funding responsibilities have been addressed and will be transferred to future owners. One example of how to adhere to the requirement to transfer O &M responsibilities is to record the project - specific WQMP against the title to the property. FUNDING CERTIFICATION A source of funding is required for all site design, source control, and treatment BMPs. For this project, the owner will fund the installation, and operation and maintenance of all BMPs set forth in this WQMP until the project is transferred to a new owner. Each owner shall record this WQMP with the County of Riverside as an attachment to the title of the property in order to transfer the O &M responsibilities to each new owner. Where the owner requires a lessee or other party to install, and operate and maintain the BMPs, the owner will maintain ultimate funding responsibilities, and will, upon default of the lessee or other party to fulfill these responsibilities, shall cause the same to be performed at the owner's expense. Nothing in this WQMP shall prevent the owner from pursuing cost recovery from any lessee or other party responsible for the BMPs, or from pursuing remedies for the default of responsibilities as provided by the lease contract and law. The owner for (Lyndie Lane, 42210 Lyndie Lane, Temecula, CA 92590) Bruce Baker will be responsible for the installation, and operation and maintenance of all BMPs until such time that the site is transferred to a new owner. SZ.0 IAA ruce Baker, DMD Date Bruce Baker, DMD 13422 Pomerado Road Poway, CA 92064 -3548 858- 717 -2929 • A -25 Water Quality Management Plan (WQMP) Lyndie Lane • Appendix A Conditions of Approval Planning Commission Resolution PA10 -211 Dated May 17, 2011 • EXHIBIT A CITY OF TEMECULA FINAL CONDITIONS OF APPROVAL Planning Application No.: PA10 -0211 Project Description: A Minor Modification to remove the playground area at the rear of the former KinderCare and replace it with a parking lot Assessor's Parcel No.: 921- 310 -018 MSHCP Category: Exempt (Section 15.10- 100.E) DIF Category: Exempt (No New Square Footage) TUMF Category: Exempt (No New Square Footage) Approval Date: May 17, 2011 Expiration Date: May 17, 2013 PLANNING DEPARTMENT • General Requirements PL -1. The applicant and owner of the real property subject to this condition shall hereby agree to indemnify, protect, hold harmless, and defend the City with Legal Counsel of the City's own selection from any and all claims, actions, awards, judgments, or proceedings against the City to attack, set aside, annul, or seek monetary damages resulting, directly or indirectly, from any action in furtherance of and the approval of the City, or any agency or instrumentality thereof, advisory agency, appeal board or legislative body including actions approved by the voters of the City, concerning the Planning Application. The City shall be deemed for purposes of this condition, to include any agency or instrumentality thereof, or any of its elected or appointed officials, officers, employees, consultants, contractors, legal counsel, and agents. City shall promptly notify both the applicant and landowner of any claim, action, or proceeding to which this condition is applicable and shall further cooperate fully in the defense of the action. The City reserves the right to take any and all action the City deems to be in the best interest of the City and its citizens in regards to such defense. PL -2. The permittee shall obtain City approval for any modifications or revisions to the approval of this project. PL -3. This approval shall be used within two years of the approval date; otherwise, it shall become null and void. By use is meant the beginning of substantial construction contemplated by this approval within the two year period, which is thereafter diligently • pursued to completion, or the beginning of substantial utilization contemplated by this approval. F: \Projects \DBB_091124 \Dots \City of Temecula \COA- PA10- 211.doc • PL -4. The Planning Director may, upon an application being filed prior to expiration, and for good cause, grant a time extension of up to 3 one -year extensions of time, one year at a time. PL -5. A separate building permit shall be required for all signage. PL -6. The development of the premises shall substantially conform to the approved site plan and elevations contained on file with the Planning Department. PL -7. Landscaping installed for the project shall be continuously maintained to the reasonable satisfaction of the Planning Director. If it is determined that the landscaping is not being maintained, the Planning Director shall have the authority to require the property owner to bring the landscaping into conformance with the approved landscape plan. The continued maintenance of all landscaped areas shall be the responsibility of the developer or any successors in interest. PL -8. Other than stormwater, it is illegal to allow liquids, gels, powders, sediment, fertilizers, landscape debris, and waste from entering the storm drain system or from leaving the property. Spills and leaks must be cleaned up immediately. Do not wash, maintain, or repair vehicles onsite. Do not hose down parking areas, sidewalks, alleys, or gutters. Ensure that all materials and products stored outside are protected from rain. Ensure all trash bins are covered at all times. PL -9. The applicant shall paint a three -foot by three -foot section of the building for Planning Department inspection, prior to commencing painting of the building. PL -10. The developer shall contact the City's franchised solid waste hauler for disposal of construction and demolition debris. Only the City's franchisee may haul demolition and construction debris. PL -11. The applicant shall comply with the Public Art Ordinance. Prior to Issuance of Grading Permit(s) PL -12. Provide the Planning Department with a copy of the underground water plans and electrical plans for verification of proper placement of transformer(s) and double detector check prior to final agreement with the utility companies. PL -13. Double detector check valves shall be installed internal to the project site at locations not visible from the public right -of -way, subject to review and approval by the Planning Director. PL -14. The following shall be included in the Notes Section of the Grading Plan: "If at any time during excavation /construction of the site, archaeological /cultural resources, or any artifacts or other objects which reasonably appears to be evidence of cultural or archaeological resource are discovered, the property owner shall immediately advise the City of such and the City shall cause all further excavation or other disturbance of the affected area to immediately cease. The Planning Director at his /her sole discretion may require the property owner to deposit a sum of money it deems reasonably necessary to allow the City to consult and /or authorize an independent, fully • qualified specialist to inspect the site at no cost to the City, in order to assess the significance of the find. Upon determining that the discovery is not an archaeological/ cultural resource, the Planning Director shall notify the property owner of such F: \Projects \DBB_091124 \Dots \City of Temecula \COA- PA10- 211.doc • determination and shall authorize the resumption of work. Upon determining that the discovery is an archaeological /cultural resource, the Planning Director shall notify the property owner that no further excavation or development may take place until a mitigation plan or other corrective measures have been approved by the Planning Director." PL -15. If cultural resources are discovered during the project construction (inadvertent discoveries), all work in the area of the find shall cease, and a qualified archaeologist and representatives of the Pechanga Tribe shall be retained by the project sponsor to investigate the find, and make recommendations as to treatment and mitigation. PL -16. The landowner agrees to relinquish ownership of all cultural resources, including all archaeological artifacts that are found on the project area, to the Pechanga Tribe for proper treatment and disposition. PL -17. All sacred sites are to be avoided and preserved. PL -18. The following shall be included in the Notes Section of the Grading Plan: "No grubbing /clearing of the site shall occur prior to scheduling the pre - grading meeting with Public Works. All project sites containing suitable habitat for burrowing owls, whether owls were found or not, require a 30 -day preconstruction survey that shall be conducted within 30 days prior to ground disturbance to avoid direct take of burrowing owls. If the results of the survey indicate that no burrowing owls are present on -site, then the project may move forward with grading, upon Planning Department approval. If burrowing owls are found to be present or nesting on -site during the preconstruction • survey, then the following recommendations must be adhered to: Exclusion and relocation activities may not occur during the breeding season, which is defined as March 1 through August 31, with the following exception: From March 1 through March 15 and from August 1 through August 31 exclusion and relocation activities may take place if it is proven to the City and appropriate regulatory agencies (if any) that egg laying or chick rearing is not taking place. This determination must be made by a qualified biologist." PL -19. A copy of the Rough Grading Plans shall be submitted and approved by the Planning Department. Prior to Issuance of Building Permit(s) PL -20. The applicant shall submit a photometric plan, including the parking lot to the Planning Department, which meets the requirements of the Development Code and the Palomar Lighting Ordinance. The parking lot light standards shall be placed in such a way as to not adversely impact the growth potential of the parking lot trees. PL -21. All downspouts shall be internalized. PL -22. Four copies of Construction Landscaping and Irrigation Plans shall be reviewed and approved by the Planning Department. These plans shall conform to the approved conceptual landscape plan, or as amended by these conditions. The location, number, height and spread, water usage or KC value, genus, species, and container size of the • plants shall be shown. The plans shall be consistent with the Water Efficient Ordinance and Water Storage Contingency Plan per the Rancho California Water District. The plans shall be accompanied by the appropriate filing fee (per the City of Temecula Fee F: \Projects \DB B_091124 \Docs \City of Temecula \COA -PA 10- 211.doc • Schedule at time of submittal) and one copy of the approved Grading Plan. PL -23. The Landscaping and Irrigation Plans shall provide a minimum five -foot wide planter to be installed at the perimeter of all parking areas. Curbs, walkways, etc. are not to infringe on this area. PL -24. The Landscaping and Irrigation Plans shall include a note stating that "Three landscape site inspections are required. The first inspection will verify that the irrigation mainline is capable of being pressurized to 150 psi for a minimum period of two hours without loss of pressure, which will require inspection of irrigation installation of open trenches. The second inspection will verify that all irrigation systems have head -to -head coverage, and to verify that all plantings have been installed consistent with the approved construction landscape plans. The third inspection will verify proper landscape maintenance for release of the one year landscape maintenance bond." The applicant/owner shall contact the Planning Department to schedule inspections. PL -25. The Landscaping and Irrigation Plans shall include a note on the plans stating that "The contractor shall provide two copies of an agronomic soils report at the first irrigation inspection." PL -26. The Landscaping and Irrigation Plans shall include water usage calculations per Chapter 17.32 of the Development Code (Water Efficient Ordinance), the total cost estimate of plantings and irrigation On accordance with approved plan). Applicant shall use evapotranspiration (ETo) factor of 0.70 for calculating the maximum allowable water budget. • PL -27. A landscape maintenance program shall be submitted for approval, which details the proper maintenance of all proposed plant materials to assure proper growth and landscape development for the long -term esthetics of the property. The approved maintenance program shall be provided to the landscape maintenance contractor who shall be responsible to carry out the detailed program. PL -28. Specifications of the landscape maintenance program shall indicate that "Three landscape site inspections are required. The first inspection will verify that the irrigation mainline is capable of being pressurized to 150 psi for a minimum period of two hours without loss of pressure, which will require inspection of irrigation installation of open trenches. The second inspection will verify that all irrigation systems have head -to- head coverage, and to verify that all plantings have been installed consistent with the approved construction landscape plans. The third inspection will verify proper landscape maintenance for release of the one year landscape maintenance bond." The applicant/owner shall contact the Planning Department to schedule inspections. PL -29. Precise Grading Plans shall be consistent with the approved rough grading plans including all structural setback measurements. PL -30. All WQMP treatment devices, including design details, shall be shown on the construction landscape plans. If revisions are made to the WQMP design that result in any changes to the conceptual landscape plans after entitlement, the revisions will be shown on the construction landscape plans, subject to the approval of the Planning • Director. PL -31. All utilities shall be screened from public view. Landscape construction drawings shall show and label all utilities and provide appropriate screening. Provide a three -foot F: \Projects \DBB_091124 \Dots \City of Temecula \COA- PA10- 211.doc • clear zone around fire check detectors as required by the Fire Department before starting the screen. Group utilities together in order to reduce intrusion. Screening of utilities is not to look like an after - thought. Plan planting beds and design around utilities. Locate all light poles on plans and insure that there are no conflicts with trees. PL -32. Building Construction Plans shall include detailed outdoor areas (including but not limited to trellises, decorative furniture, fountains, hardscape (choose or add to as appropriate) to match the style of the building subject to the approval of the Planning Director. PL -33. The developer shall provide the Planning Department verification of arrangements made with the City's franchise solid waste hauler for disposal of construction and demolition debris. Prior to Release of Power, Building Occupancy or Any Use Allowed by This Permit PL -34. The applicant shall be required to screen all loading areas and roof mounted mechanical equipment from view of the adjacent residences and public right -of -ways. If upon final inspection it is determined that any mechanical equipment, roof equipment or backs of building parapet walls are visible from any portion of the public right -of -way adjacent to the project site, the developer shall provide screening by constructing a sloping tile covered mansard roof element or other screening reviewed and approved by the Planning Director. PL -35. All required landscape planting and irrigation shall have been installed consistent with • the approved construction plans and shall be in a condition acceptable to the Planning Director. The plants shall be healthy and free of weeds, disease, or pests. The irrigation system shall be properly constructed and in good working order. PL -36. Performance securities, in amounts to be determined by the Planning Director, to guarantee the maintenance of the plantings in accordance with the approved construction landscape and irrigation plan shall be filed with the Planning Department for a period of one year from final Certificate of Occupancy. After that year, if the landscaping and irrigation system have been maintained in a condition satisfactory to the Planning Director, the bond shall be released upon request by the applicant. PL -37. Each parking space reserved for the handicapped shall be identified by a permanently affixed reflectorized sign constructed of porcelain on steel, beaded text or equal, displaying the International Symbol of Accessibility. The sign shall not be smaller than 70 square inches in area and shall be centered at the interior end of the parking space at a minimum height of 80 inches from the bottom of the sign to the parking space finished grade, or centered at a minimum height of 36 inches from the parking space finished grade, ground, or sidewalk. A sign shall also be posted in a conspicuous place, at each entrance to the off- street parking facility, not less than 17 inches by 22 inches, clearly and conspicuously stating the following: "Unauthorized vehicles parked in designated accessible spaces not displaying distinguishing placards or license plates issued for persons with disabilities may be towed away • at owner's expense. Towed vehicles may be reclaimed by telephoning (951) 696- 3000." F: \Projects \DB B_091124 \Docs \City of Temecula \COA -PA 10 -211. doc PL -38. In addition to the above requirements, the surface of each parking place shall have a • surface identification sign duplicating the Symbol of Accessibility in blue paint of at least three square feet in size. PL -39. All site improvements including but not limited to parking areas and striping shall be installed. PL -40. All of the foregoing conditions shall be complied with prior to occupancy or any use allowed by this permit. OUTSIDE AGENCIES PL -41. The applicant shall comply with the recommendations set forth in the County of Riverside Department of Environmental Health's transmittal dated July 27, 2010, a copy of which is attached. PL -42. The applicant shall comply with the recommendations set forth in the Eastern Municipal Water District's transmittal dated August 27, 2010, a copy of which is attached. PL -43. The applicant shall comply with the recommendations set forth in the Rancho California Water District's transmittal dated September 7, 2010, a copy of which is attached. BUILDING AND SAFETY DEPARTMENT General Conditions /Information • B -1. All design components shall comply with applicable provisions of the 2010 edition of the California Building, Plumbing and Mechanical Codes; 2010 California Electrical Code; California Administrative Code, Title 24 Energy Code, California Title 24 Disabled Access Regulations, and the Temecula Municipal Code. B -2. Provide details of all applicable disabled access provisions and building setbacks on plans. B -3. Provide disabled access from the public way to the main entrance of the building. B -4. Provide van accessible parking located as close as possible to the main entry. B -5. Show path of accessibility from parking to furthest point of improvement. B -6. Submit at time of plan review, a complete exterior site lighting plan showing compliance with Ordinance Number 655 for the regulation of light pollution. All streetlights and other outdoor lighting shall be shown on electrical plans submitted to the Department of Building and Safety. Any outside lighting shall be hooded and aimed not to shine directly upon adjoining property or public rights -of -way. B -7. Obtain all building plans and permit approvals prior to commencement of any construction work. B -8. Commercial and industrial project trash enclosures, patio covers, light standards, and • any block walls will require separate approvals and permits. F: \Projects \DBB_091124 \Dots \City of Temecula \COA- PA10- 211.doc • B -9. Signage shall be posted conspicuously at the entrance to the project that indicates the hours of construction, as allowed by the City of Temecula Municipal Ordinance 9.20.060, for any site within one - quarter mile of an occupied residence. The permitted hours of construction are Monday through Friday from 7:00 a.m. to 6:30 p.m., and Saturday from 7:00 a.m. to 6:30 p.m. No work is permitted on Sundays and nationally recognized Government Holidays. At Plan Review Submittal B - 10. Provide precise grading plan to verify accessibility for persons with disabilities. Prior to Issuance of Building Permit(s) B - 11. Provide appropriate stamp of a registered professional with original signature on plans. FIRE PREVENTION General Requirements F -1. Final fire and life safety conditions will be addressed when building plans are reviewed by the Fire Prevention Bureau. These conditions will be based on occupancy, use, the California Building Code (CBC), California Fire Code (CFC), and related codes which are in force at the time of building plan submittal. F -2. Fire apparatus access roads shall be designed and maintained to support the imposed • loads of fire apparatus and shall be with a surface to provide all- weather driving capabilities. Access roads shall be 80,000 lbs. GVW with a minimum of AC thickness of .25 feet. (CFC Chapter 5 and City Ordinance 15.16.020). PUBLIC WORKS DEPARTMENT General Requirements PW -1. Unless otherwise noted, all conditions shall be completed by the developer at no cost to any Government Agency. It is understood that the developer correctly shows on the site plan all existing and proposed property lines, easements, traveled ways, improvement constraints and drainage courses, and their omission may require the project to be resubmitted for further review and revision. PW -2. A Grading Permit for precise grading, including all on -site flat work and improvements, shall be obtained from the Department of Public Works prior to commencement of any construction outside of the City- maintained street right -of -way. PW -3. An Encroachment Permit shall be obtained from the Department of Public Works prior to commencement of any construction within an existing or proposed City right -of -way. PW -4. All improvement plans shall be coordinated for consistency with adjacent projects and existing improvements contiguous to the site and shall be submitted on standard 24" x 36" City of Temecula mylars. • PW -5. The project shall include construction -phase pollution prevention controls into the design of the project to prevent non - permitted runoff from discharging off site or entering any storm drain system or receiving water during all field - related activities. F: \Projects \DBB_091124 \Dots \City of Temecula \COA- PA10- 211.doc PW -6. A Water Quality Management Plan (WQMP) must be conceptually accepted by the City • prior to the initial grading plan check. The WQMP will be prepared by a registered civil engineer and include Low Impact Development (LID) Best Management Practices, (BMPs), source controls, and treatment devices. PW -7. All onsite drainage and water quality features shall be privately maintained. Prior to Issuance of Grading Permit PW -8. The Water Quality Management Plan (WQMP) must receive final acceptance by the City prior to issuance of any grading permit. PW -9. A grading plan shall be prepared by a registered civil engineer in accordance with City of Temecula standards, and shall be reviewed and approved by the Department of Public Works prior to the commencement of grading. The grading plan shall include all necessary erosion control measures needed to adequately protect the site (public and private) and adjoining properties from damage due to erosion. PW -10. The developer shall post security and enter into an agreement guaranteeing the grading and erosion control improvements in conformance with applicable City Standards and subject to approval by the Department of Public Works in accordance with Grading Ordinance Section 18.24.120. PW -11. A Soils Report shall be prepared by a registered soil or civil engineer and submitted to the Department of Public Works with the initial grading plan check. The report shall • address all soil conditions of the site, and provide recommendations for the construction of engineered structures and pavement sections. PW -12. Construction -phase pollution prevention controls shall be consistent with the City's Grading, Erosion and Sediment Control Ordinance and associated technical manual, and the City's standard notes for Erosion and Sediment Control. PW -13. As deemed necessary by the Department of Public Works, the developer shall receive written clearances from the Planning Department, or other affected agencies. PW -14. The developer shall comply with all constraints which may be shown upon an Environmental Constraint Sheet (ECS) recorded with any underlying maps related to the subject property. PW -15. Permanent landscape and irrigation plans shall be submitted to the Planning Department and the Department of Public Works for review and approval. PW -16. The developer shall obtain letters of approval for any off site work performed on adjoining properties. The letters shall be in format as directed by the Department of Public Works. Prior to Issuance of Certificate of Occupancy PW -17. The project shall demonstrate the pollution prevention BMPs outlined in the WQMP have been constructed and installed in conformance with approved plans and are ready • for immediate implementation. F: \Projects \DBB_091124 \Dots \City of Temecula \COA- PA10- 211.doc • PW -18. As deemed necessary by the Department of Public Works the developer shall receive written clearance from Rancho California Water District, Eastern Municipal Water District, or other affected agencies. PW -19. The existing improvements shall be reviewed. Any appurtenance damaged or broken shall be repaired or removed and replaced to the satisfaction of the Department of Public Works. PW -20. All necessary certifications and clearances from engineers, utility companies and public agencies shall be submitted as required by the Department of Public Works. i i F: \Projects \DBB_091124 \Docs \City of Temecula \COA- PA10- 211.doc Water Quality Management Plan (WQMP) Lyndie Lane Dental Office • Appendix B Vicinity Map, WQMP Site Plan, and Receiving Waters Map • 0 I. { dlel We` 0 fn. L 1 f d o 44 ' iiiir"I°:6,1,-. N. : :.., . 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Q 1 %WE ? 1 . 1 'tat {r, A . .. r to - jjfo1 rook "�' �' m= . — f i iM A. b _ - - f �C 6 n — 'u c £, 7 1" G' ` r p r k r f • 2. 13 f ., 4 ._ r • • . . , F — t • ^ 1 s A ; i ., C . `�:e .: . . ? • 1 .. _ 9 �� ',: ti - - r °. . r• -c.- it , ' rte r 1 � C ,� + . 3 j? 6 ' Z . T t i l 18 q • t fi, 3i£ - A ,. 11 f .- • 1 i l t r > J p ja .n,• Y� , t ;. t • -- ✓�Efi J . r� f � 1 �, s.. : - Cl 1 ' . ' ff'! L' Y t i 6• '` s ! a i M a 1 Atli ✓ • �' S r n' µ i 1 S # mitl. _ f f s ! § .4str A . 1? Water Quality Management Plan (WQMP) Lyndie Lane Appendix C Supporting Detail Related to Hydraulic Conditions of Concern • • Water Quality Management Plan (WQMP) • Lyndie Lane Hydrology Report Pre — and -Post Conditions for the 2 -yr, 10 -yr, and 100 -yr storm events • • HYDROLOGY AND HYDRAULIC STUDY Lyndie Lane Precise Grading 42210 Lyndie Lane, Temecula, CA 92590 APN 921 - 310 -018 Project No: 091124 W.O. # # # # ## Dwg # # # # ## � ,OF EAS /O • F P Sy No. 47024 w m il. Exp: 12/31/11 .\ q le OF CAO CIVIC /# Prepared By: 3 IENGL\1ERNG CONSI:LTLNG GROLT PH: (858) 259 -4711 FX: (858) 259 -5732 Original: December 15, 2010 Revised: December 23, 2010 • HYDROLOGY AND HYDRAULIC STUDY • Lyndie Lane Precise Grading TABLE OF CONTENTS 1 INTRODUCTION 1 1.1 Project Site Description 1 1.2 Topographic Source 1 1.3 Proposed Project 1 2 RUNOFF CALCULATIONS 2 2.1 Design Methodology 2 2.2 Pre Construction Design Runoff 2 2.3 Post Development Design Runoff - Rough Grading 6 3 SUMMARY AND CONCLUSIONS 9 3.1 Drainage Calculations for Sub -area 1.0 9 3.1.1 Porous Pavement - Sub -area 1.0 9 3.1.2 Storm Drain for Sub -area 1.0 9 3.2 Drainage Calculations for Sub -area 2.1 -2.3 10 3.2.1 Porous Pavement - Sub -area 2.1 -2.3 10 4 REFERENCES AND ABBREVIATIONS 12 4.1 References 12 4.2 Abbreviations 12 5 ACKNOWLEDGEMENT 13 • LIST OF FIGURES Figure 1 Pre Development Rational Method Runoff Calculations 3 Figure 2 Overlay of the Soil Runoff Potential Map on the Project Site 4 Figure 3 Runoff Index as a function of Land Use and Soil Group 6 Figure 4 Post - Development Rational Method Runoff Calculations 8 Figure 5 Calculations for BMP Design Volume - Sub area 1.0 9 Figure 6 Storm Drain Calculations for Sub -area 1.0 10 Figure 7 Calculations for BMP Design Volume - Sub area 2.1 -2.3 10 • F: \Projects \DBB_091124 \Docs \H &H Study \Hydrology.doc Page i Revised: 12/23/2010 HYDROLOGY AND HYDRAULIC STUDY • Lyndie Lane Precise Grading 1 INTRODUCTION This hydrology study is to determine the pre construction and post construction influence of precipitation to generate surface runoff for the proposed project development. The study will further examine the flow of runoff over and around the proposed development and specify the installation of appropriate drainage facilities as required. 1.1 Project Site Description The project site is located at 42210 Lyndie Lane, Temecula, CA 92590. The site is a single parcel of land and covers a net area of 0.79 AC (or 34,600 SF). The site is legally described as Parcel 1 of Parcel Map 24169 and is recorded in Book 164 Pages 67 -68 as recorded in the office of the Riverside County Recorder. The existing site topography is mostly flat (2 % -4% + / -) in a north south direction. The topography further has a graded 2:1 slope in the northerly 30 feet and a 1.5:1 slope in the southeasterly quadrant of the parcel. The site is a fully developed with the access from Lyndie Lane. The parcels adjacent to the project site are also fully developed. The parcel to the east is a strip mall (community commercial), the parcel to the west is an apartment • complex (high density residential) and the parcel to the north is a church campus (light industrial). 1.2 Topographic Source The topography used for this study is derived from the following source; • The project survey as described on the plans 1.3 Proposed Project The proposed project will develop the site from its existing state by constructing additional parking in the northerly portion of the site and an access driveway along the easterly side of the existing structure. The parking is designed to support the intended use of dental /medical offices. • F:\ Projects \DBB_ 091124 \DocsM -I &H Study \Hydrology.doc Page 1 Revised: 12/23/2010 HYDROLOGY AND HYDRAULIC STUDY • Lyndie Lane Precise Grading 2 RUNOFF CALCULATIONS 2.1 Design Methodology The watershed is less than 0.5 square miles; therefore the Rational Formula has been selected to calculate runoff. Q =CIA Where, Q = Peak Rate of Flow (cfs) C = Runoff Coefficient I = Average rainfall intensity (in /hr) A = Drainage Area (acres) 2.2 Pre Construction Design Runoff The soil runoff potential for this site is determined by overlaying the site location on the Hydrologic Soils Group Map for Murrieta (Plate C -1.52) published by the RCFCWCD. The overlay is showing in Figure. 2. The soil runoff potential for this site is A —BC. A conservative design soil runoff potential of type C will be assumed for this project. • Cross - referencing the soil runoff potential (C) with the land use and using the table shown in Figure 3 determines the runoff index for applicable portions of this site. The anticipated land uses and corresponding Runoff Indices are listed in the following table. fCo a t �Runoff'I dez` 4 a L 2 + d 4 Resldential,�orhCommercial L'andsca 4 t,69j S riNV Graded "Landes s & 191 , Using the runoff index and the formula for infiltration specified in section C of the RCFCWCD Hydrology manual the runoff coefficient prescribed by the rational method can be calculated for each area. The infiltration rate Fp for pervious areas is derived from plate E6.2. (Fp = 0.38 for AMC = II). C can be determined from the following formula; C = 0.9 * [Ai + (I- Fp) *Ap /I ] Where: Fp = Infiltration rate for pervious areas — inches /hour I = Rainfall intensity — inches /hour Ai = Impervious area (actual) — decimal percent Ap = Pervious area (actual) — decimal percent and Ap = 1.00 -Ai The time of concentration across the project site T is determined from the nomograph • entitled "Time of Concentration for Initial Sub - Area" plate D -3 of the RCFCWCD Hydrology Manual. F: \Projects \DBB_091124 \Dots \H &H Study \Hydrology.doe Page 2 Revised: 12/23/2010 HYDROLOGYAND HYDRAULIC STUDY • Lyndie Lane Precise Grading Where, Tc = Time of Concentration (hours) L = Length of Watershed (ft) H= Difference in elevation along effective slope line (ft) The storm frequency for this study has a 100-year recurrence interval. The average rainfall intensity is determined using plate D-4.1 (RCFCWCD Hydrology Manual) by cross-referencing location, storm frequency and duration. The initial pre development site runoff, Q is calculated as follows; QPRE = CIA Subsequently, adjustments are made to the initial site runoff as defined in Plate D-1 "Instructions for Rational Method Hydrology Calculations" (RCFCWCD Hydrology Manual). A summary of post construction drainage calculations are shown in Figure 1 "Pre Development Rational Method Runoff Calculations". �....� „_. _.� ,_ ___ , v ,�._ Subarea � :� ;�' � � ^� ° �' ` f 3 ' ? No N r�,' �� Area Intensity � Y`R D�scharge °� • � TM : 8 _ .4 ° � .. 7 V�P.11.�.: y ' �.�_i � � � .._� SF � AC' Tc I�" R 1: C Q�� Q'� � J � 1.0 w* fi � 12489 �� 0 287 550 4 86 cfs 91�> 0 89 1 24 cfs 2 4 cfs� 2.1A �,�� 0 2526 � 0.058 Y5'�0 ,; 5.1.0 cfs- 80' ;, 1 Q 89� . 0 26;cfs'_ �_';; � 2.2 t`� �` t 3561 '�0 082 5:00 5 10 cfs 93�= x 0 88' 0 37 cf§� _ �2.3 �,. ;� 12349 0 283 4.25 5:10 cfs 73 D 89^ 1 28 cfs� 1 82 cfs': � 3:0 ;� 2900 °- 0 067� 5 00 �5 1D cfs� 69, �. 0 84�0 29 cfs 0 29 cfsa t -. :c' � --a,T .. . -� �„-,�-�..°— � ; s � a" :. --�- -v„-=:. f 4.0 ' "� 796 i 0 018; 5:00 � 5 10 cfs "" 80 ' q 0.`90� 0 OB`cf"s, 0 OS cfs"i 3. e+ �'�l Y �� d j�Totals r , :34621 �� 0 795 �t� ` � � .� � , - - � g ' "-�„ 3.43 cfs� ;_ Q`�� Ad�usted per Plate D 1 _y �. �"��'.___. M ... ' __' `� ,� � _ x. . _ _ . ��=� _ _ �._ _ _ �x Figure 1 Pre Development Rational Method Runoff Calculations The predevelopment drainage map is shown in insert H-1 "Pre-Development Hydrology". • F:\Projects\DBB_091124\Docs\H&H Study\Hydrology.doc Page 3 Revised: 12/23/2010 HYDROLOGY HYDRAULIC STUDY • Lyndie Lane Precise AND Gra u F ! tx tw 1 "1 Y N'a �1 r'1 f • ✓ L q , y,,, 7 Ir ,y,1x w 1411. .. • f a f ' x ` �'� rcrcL flf.5 "H, { ' i EY x � �+ �r� !" tr. 7. n 4H y� 1 / ♦, p 1 t i r, ✓ft •.x,64 u d f7( 4� a'� ro , , . { a+� ✓. + 1 4 -k , • y „� r t''a .V'` t . *07. m �* 7� a" ta `fL1 vJ : , oyr ,.3 { f� i�# gpt S'wv /L, , „ '4. "} n . ti r wbni *` '3tk' x f i t y .,i,, Bc brA - " w y� " x � a Y r I ' t t, • h'/ f ,„:„.,;;;16,4 . ,ti, ( °`i IlAl yaS.'�'g ' f + w . 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"` +'..n. c g�PR OJECT SITE ENGINEERING L ndie Lane CONSULTING • I RI 'if P•t: .I O•: I:' �'"" GROUP 42210 Lyndie Lan 1 Temecula, CA • Fig 2 Overlay of the Soil Runoff Potential Map on the Project Site F: \Proj \DBB_091124 \Dots \H &H Study \Hydrology. Page 4 Revised: 12/23/2010 HYDROLOGY AND HYDRAULIC STUDY • Lyndie Lane Precise Grading 3 ` "�,� Runoff Indices °� ` # ' , � ' ' , , , r , `' , _ .. �� . �.�_y .�._ ._,,...w .. P- m_., _. n � �, �R � , . � _, ""' � ��Runoff Index .: ,, - ,` k ' SoilType Cover�Type' " '� ` � Qualityof� A i B" "; C �;D 'f - _� „ Cove�,x � - NATURAL COVERS �- � �� .� `�i. Barreq (Rockland eroded and graded'land) �" ` `'� � 78 �'86 : 91 j.� 93 i � Chaparral Broadleaf r `" . ' . Poor"? 53 # , 70 7 80 `"° :85 ? _ ..� .. =---�- , "-- ; � ____'� _ �. �� > � �, ��((vlan'zonda;�ceanbthus an`d scrub�oak) Fair �� 40 ; 6 F 75 ''; 81�:� E �' � � , � � ��, f �� a Good 31 �. 57:; 71 y, 78� w :.� ... ;, :_ }� _.: _: _ ,� �., w ..w-_: - � Chaparral Narroyvleaf � ,,�,,,�„,. Poor"�� 71 �•82 � 88 s':� 91�', < (Camise and redshark); �' �� ' i � F 55 � r72 81 ;: 86 . � Grass;tA nn ual o�Perennial' r ��,� Poor i 67 � 7g;� 86 j 4 $9 w , t x s R � � Fair�. 50 1 69� 79 �. 84 : � k . :�-,t� ' � � � -° (;OOd � . 38 ;� .61' 3 74 ;.', .a� � Meadows or Cienegas ° Poors 63 ; P 77 85 r. 88 � � � (a'reas wittS�seasonally',F%igh wate'r'table, ' + �•v'" �' Fair ; 51 a -, •;70 � 80 :;ry� 84'� Pnc�cipal vegetation is sod forming gress) � � �� Good'� 30 j 58 72 I:= 78��i - _. e:' .. �._ .. .: '�.. -.'+ . .._.... rv .:i 3 , .,.,, � �.«;.�. �_._.... ....d _._.... �"�.° _ . O en Brush, a � � '�„ � � �' __ p = ° ` � � � _. ° Poor ? � 82 � . z76 i 84 �, _ } 88 , r ,;_�� ,:� �. : ,� .. _ �, , (Soft wood scrubs buckwheat sage etc ) ' �, • " - . Fair 36 ' ` �, 60 73 79 � • °.,�� , � r� � ' „ , � '� f �,� , V ` Good � , 41 +�, � 75 �� 81 d , Woodland > _` �, , Poor'=. 45 t: 66' 77 83 #y , �.� � r_F � __W _ a� �_ _ ..0 , - - ; = ' -�� ! � (Cofiferous,oc broadleaf4rees predominate`"= v ' �`� � „ z ,, �, , � Faar�;� 36 j ,�60� 73 ;,, 79,+ t � ` Canopy densiry �s at least 5� percent) , �� , Good e 28 ;,_ , x 55 � 70 A � 77„� -,__ �_ �_.� _ � .s- _` _ � Woodland Grass � � � : t� _��`� �.�> "Y Poor �� 57 ; �73. 82 ! < 86�:� �(Coniferous or broadleafYrees with canopy �'� � Fair t 44 65 ; 77 F' 82'+ m�,..� - � . ,, '^re'.T�{�' 4 w .-. �.-. p.... . � Density,from 20.to"50 percent) " ° t �' " - `�, � � y'� Good,� 33 � 58, 72 �.79t? � �. ..� � ORB,4N.COVERS �'� y � s �' ' � `� �� . . _: _ � � -.. , .� ,, , ; , , , �: �. f � , ,:a ° i x Residential orFCommeraal Landscaping �,, � � � `; Good 32 � 56 � 69 ": 75 { ,__-0 ,�.� _. ,_ _ _ __.. - � (Lav�%n; shrub's _etc ) � , �_; ' �� r � ` ;�� '" � . �_ f � � �' �� Tuef 3' .� k K '` x ,� ,� Poor? 58 S� 74 � 83 k 87? ,,,(Irrigated and"mowed g�ass) ,;.; 7� ;' � Falr�; 44 65� 77 �,� 82:4 3 ' � ' r �� , � .� s� �` �, � �'Good . 33 ` ' 58� 72 ` � 7fl°d �.__ .. x �, ... .�. , ;.r. : 'AGRICULTURAL'COVEftS- t xw- ' ; � j� " � ? f � , r � � � � Falfow ' �, Ar � * �, � a 4'" � m �, � " �; 76 � � 85 ' 90 ° 92 , �,, _ . �: E (Land,plowed�,butnotttlledorseeded) �_ ' 3�� _ � � � �� '�'°:i � -� " Legumes Close 5eeded � � �, �. 3 Poor ' 66 Z7 � 85 `'_ 89'° ' r � Alfalfa�sweet clover-timoth" etd •-? ,, „'•� � >� � � � k �� (�. _ Y . )� � �. 58 E ._ Z2�; 81 � �85�� Orchards Deaduous �` ,� � �: " " ! See Note 4 E .:y ..�-� .. �.; i ��,,.:.._L' ! } �; 1� (5 ..�.. �1'� J. f" . . ,.( les a ricots ears+walnuts.etc �t , �' -� , -� ,. A �"u ��:; .PP. P P_ ) ��:c�. �.. b..�tr i ,� P Orchards Evergreen 3 „ � st+�'';� ��,,, ' : Poor�� 57 r 73 � 82 � ; � ` (Cit ur s Avocados eYC ) ,� ' � � x� '`� � , �" `; , � Fair �� 44 ; s65:� 77 � •�, g2 ; !� �.�w;��" ��.x.�..��.. _ ��_.. �_:::: v.�'.,.�_ _,_ �' _' .Gootl`` 33 L.58� 72 E--'79 . F:\P�ojects\DBB_0911241Docs\H&H Study\Hydrology.doc Page 5 Revised: 12/23/2010 HYDROLOGYAND HYDRAULIC STUDY • Lyndie Lane Precise Grading � � � ��. � RUf10�If1dICB6 - � ..�::� . ..�,.. � < ° ' �, k � v �" �. t ' �, t �:. _.... ..-..._ __v .....k �, °l� � a �'� Runoff Index r, - i a Soil Type L a. , }U : � s Cove'r Type ;-� ,: qual�ty of " A � B; � C `�D � � �:. « � .' � �� ' � Cover �, ; ^ � �: � : n x ' �: � Past Dry,land �' �� Poor': 67 �.,` 78 , 86 � 89, s , fi(Annual grasses} � � Fair"� 50 ; 69"' 79 i-. 84 ! . _:� ,k, ;_ _ �,� , �..,t .° ,��:`� $� - . ,� � , -, _, , t : . �� _ . Good�= 3 „.81� 74�; 80� _ ,. � k . , . � Pastu�e lmgated =, � � Poor � 58 � 74 83 (� � 87 � ,�., ,. � _(L'egumes and perennial;grass). �LL' " �; - Fair'� 44 �° 65=. 77'�� 82. � ti �� r e�s � Good 33 58� 72 .; � Row Grops ',� ° "� mr �: P.00r,<', 72 �.81:� 88 i,, 91,'y ��(Figld crops � fomatoes-_sugar beets etc ) � z � Good ` 67 + r 78 s 85 �� 89� SmaIIFG ` f w`, r ,'_, '� Poor �� 65 I;76 , 84 E g6t# ' ' ' (Wtieat oats � bariey etc ) � , �, ' Good �� 63 , =75 , 83 �: 87 ' .��. . ;„ x . _ � r.. .. ..... _ ,� � ,.� w a� , ., . :� ..�.�,, �.�.. .,.�..,.� Vineyard _ ° �',., , � . �,� , °� _ _. �.>. " � ��: �� See Note 4 > -- _ � � 3 � w � _ �7. . - � ��. yi G �rioTES> , _ `.� , a '�.� , � � 1'�All'runoff index (Rf) numbers are�for Antecedenf Moistu�e Condition "� �'� � E �: t�' (AMC)w�� : �.. � �r i ' �.r �� ' 3 �� i • � 2 > Quality of CoVer Definitions , " ''` " } "� _ ' � � � Poor , Heavdy graied or regularly bumed areas Less than 50 ,� ' � � � - Percent of the ground�surface is protected by piant cover ' .; �? i ry '�';, � E;:= """ -; � -0r brush and tree canopy " .� � � L � 1 4 _Y. { . ......«. � r d '. i � r .Fai� `s ''Modera , ; G �� ,..� ' ground surface protected f' $ �� s _- ,- : _� _� _r, _ .._ �. ,, " . _..� _,__ �- � � �- � ; , ._ < _ �� __ Good �. ,�Heayy or-dense.coverwrth moPe'�than 75'percent of t6e ° ° � � �� < <; � _ �_ _� � � . � .__4 � ; t F - ` � ��ground surtace proteGted a � , �� : � 3 � ; 3 See RCFC'WCD Hyd�ology Manual plate C-2 for a defailed �� ,:;'°, {.`° E descnpfion of;cover types ` ,� � " " ; � .; ,� � ; , 4 Use runoffindez numtiers based on ground cover types. See r�;=` ' 4" "�":�` i �:� '�; � Discussion under Cove� Type DeSCnptions on plate C'2 ,�'� '" � e s ,, << k'„ � ,.a , ._._. _ � . -,--� � __.,,,...�.. s,... �,� � 5, Reference,RCFCWCD Hyd,rology Manual_Bibliography'item 17 n. '� . . f„,� €�' ,�� ,,� „;; a5ource Piate Hydrology Manual Apnl 19Z8 � '� x t?u � Figure 3 Runoff Index as a function of Land Use and Soil Group 2.3 Post Development Design Runoff — Rough Grading The post development drainage patterns for the rough grading of this project have not changed significantly from the pre-development drainage patterns. These patterns are illustrated in insert H-2 "Post-Development Hydrology". The primary change to the overall site hydrology will be a slight diversion of runoff prior to discharge in MS4 using • infiltration into porous pavement. Post development ground cover will approximate pre development ground cover with the exception that sub-areas 1.0 and 2.3 will have F:\Projects\DBB_09� 124\Docs\H&H StudyWydrology.doc . Pa9g 6 Revised: 12/23/2010 HYDROLOGY AND HYDRAULIC STUDY • Lyndie Lane Precise Grading more pervious area and sub-area 2.2 will have more impervious area. The soil runoff potential for this site is determined by overlaying the site location on the Hydrologic Soils Group Map for Murrieta (Plate C-1.52) published by the RCFCWCD. The overlay is showing in Figure. 2. The soil runoff potentia� for this site is A—BC. A design soil runoff potential of type C will be assumed for this project. Cross-referencing the soil runoff potential (C) with the land use and using the table shown in Figure 3 determines the runoff index for applicable portions of this site. The anticipated land uses and corresponding Runoff Indices are listed in the following table. Cover 1'ype ; , ;;: "t . Runoff.lndeic , Res�iclential of Commercial Laridscapmg�� 69�v ; Graded Land ` � ' � 91_� ' - . _,_�� a�.� .. � _ _, �.. ��_�w _.. � ._. Using the runoff index and the formula for infiltration specified in section C of the RCFCWCD Hydrology manual the runoff coefficient prescribed by the rational method can be calculated for each area. The infiltration rate Fp for pervious areas is derived from plate E6.2. (Fp = 0.38 for AMC = II). C can be determined from the following • formula; C = 0.9 ` [Ai + (I-Fp)'Ap/I ] Where: Fp = Infiltration rate for pervious areas — inches/hour I = Rainfall intensity — inches/hour Ai = Impervious area (actual) — decimal percent Ap = Pervious area (actual) — decimal percent and Ap = 1.00-Ai The time of concentration across the project site T� is determined from the nomograph entitled "Time of Concentration for Initial Sub-Area" plate D-3 of the RCFCWCD Hydrology Manual. Where, Tc = Time of Concentration (hours) L = Length of Watershed (ft) H= Difference in elevation along effective slope line (ft) The storm frequency for this study has a 100-year recurrence interval. The average rainfall intensity is determined using plate D-4.1 (RCFCWCD Hydrology Manual) by cross-referencing location, storm frequency and duration. The initial post development site runoff, Q is calculated as follows; • QPOST — CIA F:\Projects\DBB_091124\DOCS\H&H SWdy\Hydrology.tloc Page 7 Revised: 12/23/2010 HYDROLOGYAND HYDRAULIC STUDY • Lyndie Lane Precise Grading Subsequently, adjustments are made to the initial site runoff as defined in Plate D-1 "Instructions for Rational Method Hydrology Calculations" (RCFCWCD Hydrology Manual). A summary of post development drainage calculations are shown in Figure 4"Post Development Rational Method Runoff Calculations". The corresponding post construction drainage map is shown in insert H-2 "Post-Development Hydrology". �.ClIlE72�B8 '�-�s —r - ^ -- ^n � � s I a s, �� '. �"�T'' �, e ; ,,,fl � � i m � ' ��' � r `f � }, No ; r �., , Area< Intens,�ty �, �,��;Runoff e D�scharge ^ ; 1 k`�� 'cn �i� '�� r*i` � � :C.OB{{� ' � `�. � �, �.4rst� a +� �o � $F �AC� } TC; ��Ex�..asrR�° I � �'' _ �Q � � � 0�"`' ,t �'12489 , 0�:287 5 5Q ",4 86 cfs � 91� 0 88�,� 'J 22 cfs *� ? �� ,�� , , �. } ,� � -�.a.�.,.. '�,° "" ,: � �., � -„ ; 2 1' � , � 2526 0.058 5 OQ �* 5 1 D cfs 91 0 89 0 26 cfs ; � 2 2 >'' 4 ��3561 0;082 5 00� 5 1D ofs 81 ;, � D 90 _, 0 38 cfs_ � #' T v y t-�++�".r+ � 2w3 �' 12349�g-0:283� � A.26 �, 5 10' cfs 91 -fi �,0 88 .: �1 27 cfa 2 93 cfs�? i 3 0 ;,� 2900 ' 0_; _,067� 5 OQ ° 5'10 cfs `� 8D 0 84 ' 0 29 cfs;�x D 29 cfs : �4 0�. ��" �' 796 0� 018 �5 25� 5 10 cfs, 99 �0 90 ��0 DS cfs�� 0 08 efs � � TOt215 � xi �'" ''-'34621�� x 0.795 t '� .�, ` �"+' `� `� � ` r ' �� °; r' 9 36�Cf5,; k rt ; Q` �'Ad�usted;per Plate:yU 1 " �� . �.' '" � � ;,y_ A �'�',,.., �`: �?: • Figure 4 Post-Development Rational Method Runoff Calculations • F:\Projects\DBB_091124\Docs\H&H Study\Hydrology.doc Page 8 Revised: 12/23/2010 HYDROLOGY AND HYDRAULIC STUDY • Lyndie Lane Precise Grading 3 SUMMARY AND CONCLUSIONS The proposed development will marginally affect storm water runoff from the project site by introducing more pervious surface to the project hydrology. The net peak runoff from the site for the 100 year frequency storm event will decrease by 0.07 cfs from 3.43cfs to 3.36cfs. 3.1 Drainage Calculations for Sub -area 1.0 Q 1oo= 1.22 cfs 3.1.1 Porous Pavement - Sub -area 1.0 The BMP design volume is first calculated using Worksheet 1 of the Riverside County Storm Water Quality Best Management Practices Design Handbook, dated July 21, 2006. The design volume is based upon the 85 percentile runoff event. 1. Slope value from the Design Volume = 1.22 2. Determine total impervious area Aimpervious= 0.210 acres (5) 3. Determine total tributary area Atone = 0.287 acres (6) 4. Determine Impervious fraction i = (5) / (6) i = 0.73 (7) 5. Use (7) in C = .858i3- .78i2+ .774i + .04 C = 0.523 (8) 6. Determine 85% Unit Storage Volume. Desired Vu value. Vu= 0.638 in- acre /acre (9) 7. Determine Design Storage Volume a. VBMP= (9) x (6) [in- acres] VBMP= 0.1832 in -acre (10) b. VBMP = (10) / 12 [ft- acres] VBMP = 0.0153 ft -acre (11) • C. VBMP = (11) x 43560 [ft3] VBMP = 665 ft3 (12) Figure 5 Calculations for BMP Design Volume - Sub area 1.0 Therefore, VBMP = 665 ft Infiltration Rate = 0.5 in /hr (ref: Project Geotechnical Evaluation) A = 9 *9 *18 = 1458 SF v = 1458 *0.5/12 ft /hr v = 60.75 ft /hr t = 665 / 60.75 t = 10.94 hrs drawdown 3.1.2 Storm Drain for Sub -area 1.0 Q 100 = 1.22 cfs S = 0.010 Manning Pipe Calculator Shape Circular Solve for Depth of Flow Given Input Data: Diameter 10.0000 in • Flowrate 1.2200 cfs Slope 0.0100 ft /ft F: \Projects \DBB_091124 \Docs \H &H Study \Hydrology.doc - Page 9 Revised: 12/23/2010 HYDROLOGY AND HYDRAULIC STUDY • Lyndie Lane Precise Grading Manning's n 0.0100 Computed Results: Depth 4.5719 in Area 0.5454 ft2 Wetted Area 0.2430 ft2 Wetted Perimeter 14.8507 in Perimeter 31.4159 in Velocity 5.0203 fps Hydrualic Radius 2.3564 in Full flow flowrate 2.8483 cfs Full flow velocity 5.2223 fps Critical Information: Critical Depth 5.9139 in Critical slope 0.0042 ft /ft Critical velocity 3.6291 fps Critical area 0.3362 ft2 Critical perimeter 17.5357 in Critical hydraulic radius 2.7606 in Critical top width 10.0000 in Specific energy 0.7727 ft Minimum energy 0.7392 ft Froude number 1.6360 Flow Condition Supercritical • Figure 6 Storm Drain Calculations for Sub -area 1.0 There for a 10 diameter corrugated HDPE pipe by ADS will be used. 3.2 Drainage Calculations for Sub -area 2.1 -2.3 Q 100 = 1.81 cfs 3.2.1 Porous Pavement - Sub -area 2.1-2.3 The BMP design volume is first calculated using Worksheet 1 of the Riverside County Storm Water Quality Best Management Practices Design Handbook, dated July 21, 2006. The design volume is based upon the 85 percentile runoff event. 1. Slope value from the Design Volume = 1.22 2. Determine total impervious area Aimpervious= 0.272 acres (5) 3. Determine total tributary area Aotai= 0.490 acres (6) 4. Determine Impervious fraction i = (5) / (6) i = 0.555 (7) 5. Use (7) in C = .858i'- .78i2+ .774i + .04 C = 0.376 (8) 6. Determine 85% Unit Storage Volume. Desired Vu value. Vu= 0.459 in- acre /acre (9) 7. Determine Design Storage Volume a. VBMP= (9) x (6) [in- acres] VBMP= 0.2248 in -acre (10) b. VBMP = (10) / 12 [ft- acres] VBMP = 0.0187 ft-acre (11) C. VBMP = (11) x 43560 [ft3] VBMP = 816 ft3 (12) Figure 7 Calculations for BMP Design Volume - Sub area 2.1 -2.3 Therefore, VBMP = 816 ft • Infiltration Rate = 2.4 in /hr (ref: Project Geotechnical Evaluation) F: \Projects \DBB_091124 \Docs \H &H Study \Hydrology.doc Page 10 Revised: 12/23/2010 HYDROLOGY AND HYDRAULIC STUDY • Lyndie Lane Precise Grading A = 12 *9 *18 = 1944 SF v = 1944 *2.4/12 ft /hr v = 388.80 ft /hr t = 816 / 388.80 t = 2.1 hrs drawdown • • F: \Projects \DBB \Docs \H &H Study \Hydrology.doc Page 11 Revised: 6/1/2011 HYDROLOGY AND HYDRAULIC STUDY • Lyndie Lane Precise Grading 4 REFERENCES AND ABBREVIATIONS 4.1 References • RCFCWCD Hydrology Manual, dated April 1978 • Site Plan for Lyndie Lane by Engineering Consulting Group, dated 11/9/2010 • Limited Geotechnical Evaluation, 42210 Lyndie Lane, APN 921- 310 -018, Temecula, California, dated 9/15/2010 4.2 Abbreviations Abbreviation Meanng titxr�ti�j13�mw'+�Eir�Ufi ^t7} £., A Area ac Acres C Runoff Coefficient cfs Cubic Feet per second D Duration DPLU Department of Planning and Land Use DPW Department of Public Works ft Feet fps Feet Per Second • F.S. GREEN BOOK Factor of Safety Standard Specifications for Public Works Construction H Height Rainfall Intensity in Inches in /hr Inches per hour L Length P24 Twenty four hour precipitation P6 Six hour precipitation Q Discharge ()POST Post Construction Discharge QPRE Pre Construction Discharge RCFCWCD Riverside County Flood Control and Water Conservation District SF Square Feet SFR Single Family Residence T Time of Concentration • F:\ Projects \DBB_ 091124 \Docs \H &H Study \ Hydrology .doc Page 12 Rcviccrl• 10 HYDROLOGY AND HYDRAULIC STUDY • Lyndie Lane Precise Grading 5 ACKNOWLEDGEMENT This report was prepared in the offices of Engineering Consulting Group, 12790 El Camino Real, Suite 130, San Diego, California, 92130 under the direct and responsible charge of David A. Ashcroft, PE. David A. Ashcroft, PE C47024 Exp: 12/31/2011 • • F:\ Projects \DBB_ 091124 \Does\H &H Study \Hydrology.doc Page 13 Revised: 12/23/2010 I \ ,47. ,,, .. \ KEY NOTES '�.` / '�., \,. SIE L10O1TeunIRwLT 1 wFFNLBwIiEeil®s BIKE MIHIWAL MME eti RACK BLACK Panel �I PROJECT SITE INFORMATION LEGEND - PAVING /LANDSCAPING \`� � � � CO„ED OVER a„C-„ATEO FINISH BYili ANDpRODDD1]„e>uP D p walµLTwo1oT x PABBNT SPACES Wlmmu4AGEAND raue4T 1 1 Am:021-310.1e TO CW I 0 u SYMBOL DESCRIPTION AREA (SE) T ,Q A 9F v � C-2 ' -� AA M O lap 4m0 LYrfEUrE 0 hp -p � A M ,� � '�� 0 INSTALL ME (1) A�IKYAL main Pwaan SPACE E 1BESTIIA G O410 3 4 J te a' 4 Dorm1ANOY17 Fan NIDE DRIVE MEMO TO ACCESS AID ONAL p i LEGAL DESCRIPTION 8.542 ePTRKiY �. 1111 LANDSCAPE C � i 4AD44UrM<TeC E O :Loa <c A � �� { V� V P STALL ATF FNt OF PARCEL 9 AHEM OF M w RECORDS oF RIVees�muar, INDOOR ruralsaA ACES i / � ,� � �. � V � , waACLwoer.Dm SLAW TO PNNTEBBWaID PNe.T1[T IR♦OT PARCEL MAP e : � 221112111?-1111P1 ASPHALT PAVEMENT 13.350 ��'t v�V '� -. - -, O ileFALL FOOT MOH PEDESTRIAN BASaetF IVEHICULAR DEVELOPMENT CRI TERIA n + \ ! \ '� � J ' ' \\ T,.uA1TFmrlmE,weuLT CONOaTEwmewAYroALC®orcW E Ow T2 RMOOn . mix mwlYn®GVi 1.11111111F111111:13 �ti/ t$ > �JJ414.0 � � : @ ,. ., / v � V Trwnc i PROPOSED ZONING. COMMUNITY QaLL .? A t J3' �`�' fiY �� ry �� ° P WC LOT AT I£M OFPABCE (IF E14HNLPWT DEBKiRATCx.COaedelrmaeBTOA1 POROUS ASPHALT 3.221 3 i ' ,a / TS �s t -°4 11 " l ' 1 1 = - "�. -1 . � ,� ' ' \ 0 INSTALL THEE NEW P,vma LOT LWT3 w REARPAmvla Lm. wml ! g ( E%a a& UE- FAIALYGTTNe g I e 9 ` i(l £fi m0P0® w11IlE .OBGNweSTFxOFTTCB PAVEPAVEMENT L LL3 s Q� r a r i n � , � � t Q d �� V 4 � s c r a m a x r a w CAX) CYLINDRICAL par NPal J uv� Facia ac Ili aE TOTAL m0EO AREA 34=13F 34=13F OS AC /c 1 16 l / /. �y, \ '4 g � scram � Dino FT LIGHT anu un A CMO co+OEleaC4J yy TOTAL NET HER 341C0 2 F 0.11 At / efms 1 "t C � P AASRIS PAN]xalDf Wl111uA0QINIML VERICLE '8 TOULeDnnwNEw e,meeF 0.1a FM CONCRETE PAVEMENT 3,281 m y / t "�' y . E wU/n;/ rs1 \, !!!!!! v . ,� / S / ,. 9 �' m FIRE (f eimriBAiv - t \ Ztb `\ 1Q werAUTMO FOOT WOECOOETE OMW�BWNF Pe+v2 Eexr. CD W PARKING a !' ¢ auB U�iff 0.20013F 0.20013F e0.20013F 17.0% f � ' � ��' a x � A ' r _ IC wG ES: la ® s .ex Pit. ]�L .cT.r / 4 ay vumeraser° 1 ale' 4 v w aIE F RA aloe aF 23.7% I BUILDING AREA 8,208 ` e'.c /"J °° ¢ `Y( lzt'"' L . /( \ \ \ `. � \ MOEIE UIx 3.270 EF 0.9% j j } 1 CO I lt{ t O : ' y •� �"' . 3 1 ' N. , ' � urernLAUm]er rET/ra+a WALL O 1 1:124 SPACE2IN EA ®IEgE� 3PIC ®flV0/L® I .{ � � i '` { 4{ t { V" 5 ` j "<' \ � 1] waTNl]CBNLYO CATCH SAewmPAKKWAY (iAIE]CLEYfNhTHI 1 A&EO maFare al ]1 I OROUS le P.D.0 TOTAL= 34.800 / � �� r n rQ� y ,r c a t f 'h �� ' FEmenax EYSIBI�m.DTLBaA TC.A J OB EpEA® ] y PDROUS PAVEMCNT / / BCYCIESPA® 1 e fir ,J �, 1e 9AVCJT ISTTI0 ETE wAuovAY CV MOTORCYCLE SPASPACES 1 ] /t �� I `�+' F t a x. V N M TOTN PARKING 31 ]1 I "� -070; ¢ / ��//��11 �' l � ` FILIXIAEA MTp. 0.30 (1 -0W%WIOB✓S1YaYlH1 3% YTO1a080 F3011 19..`.a R 4 A / EiE CN®HUprtTUI WW(WAYTO W1CH fAVLE 1MMEWOWE /( 4v . awANCrawawFrwTO+. ;�1 - T'IP -+ eSLOPE E . f t c A / / • � \ � \ O) ' OCCUPANCY TYPE. EN OWN RCM) _._ 2o1c <i> n ` / � e' '� ff Eb_ TV ® amruL 1rc A0991arolwwNrolYAneOSFTwvro Flwrvuw p n• 1 SPRINKLERS 'v01��0 I aatwm / � / $" 1 t 8 ta FIRE Al-NRIA • YES PER STD. 301 I. 1eEE C FIRE � lame Ae r 1 l J/ rwc :146 � / , ° ^pa .Y 1© RaINL w•moms CATCH BASIN W/PAIWWIAYtlNTE]CIENA Z J) 4 Ili LTMTIEN alarm =we= E112•3311140 I10ERSCEWAIX O AN PEE Q, NURSER C Saab .1 INSTALL 3- PP.C.C. D5. SAND , / C L � ! ~ F \ rep. in C d81E£T04) HEIGHT OF BJE➢eL. POIg11BPWT.O \£ 6?i C R °4 3 - ' j ® mutat ice So IWtN TO O ®i NNdAN OWNER APPLICANT , � ar x1� nr� tzDTs r J " , � 4-./" ) I 2E / . miDAHRAFE DR. BRUCE (NGs GW AB r «Z) ,_J' EX 4.443C44 4.443C44 ` 1• // / /� / "• / -, ! ?.1 "!e �J f , 1® PETALL VmIaIEW.W(Oi -a. mimeos* C P.O VA Y . CA 1 OV 331 12190 EXDP C EEUwq N. ERRE I TN OORM POROUS PAVEMENT - TYP. DTL ( ottn" `'1` /�l / 5-a 41 1 5 /// / // NE DRIVEWAY ]O ® INSTALL wAuJ RT11GIH1 ®WMFTTBYb O✓B1I®TOPMBIOIOT NNAY. CA FL NRq REAL SLATE \ -. MS 0135 35 7/1 / // '> P: 9513-712,2922 BM DFflD.GfQ1ID \ - - O TILTED AT Sr. USE MOW DS H0 1310VewOEl ERTA&E iILA L 121311110 P.aB]IDAT1 L1] �1 1 • ID ' - m 4 4 1 1 2 t k NT IgONED LIGHTS MAY E UIaUTILIZED F SURABE P PLACES) Et eFTKd / ® 4 f /-"'- SOF F.�' eIII CtWNUNK FENCEXY iiSTE N. .I 1' \ W.>E � 1 N { r / "-�.� © Dins FREE swam SIT Emma oWIR5 tlE SA£ no Mar et' i / (12 .'{19 3. WAINAE. USE WON IPS /SWW. 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'F`xra f EASEMENT NOTES S T -' .S9.: a / - / J \ 1�' i 4"19.2.4'5 y 2 / I9 �e�p)D O AILGDigOI ATE]i.VEllF1H11OE�P@�waTR RTiP0® W � V / ) / T f. N /1d. F^ W Ltat® m A I - -7 '% _ N1 A9FNTRA WYiVNAYS, Oa3➢tl O1B1ATIY ® NO wWTBW1£ y�� _f } fi t TTTT PURPOSES TO R AIOC CAUFOMA WATER m'CT- PER NM ry 6 `y am...! r<P F S ' v '11e O., 1 , / RECORDED wYXt® { p E 5 s a 4 ^. r ' / / 3 ANB ENT FOR PaaPE TO WDITEFN W3CN FOAE1 W. FBU61N. '1"i ¢A J / ? / C! ..� �ry ` " y r 4 . ' + /S`s 11/ RECCROED It 1397 131( 321 P0 \. � VISTA PD , ✓�/ o :FkI$ 1� r/ i PIOTOBE T PFF / 4 / / ° L A I 4 AN EASEMENT w FAVOR OF GTE GLM:if/IA MORPORATEO FOR UMW -� 1 s J - J t �' At) t j� 4� Js We PER wa nt ; lB ¢, RIO COMER 1 1Ya @ ABET w r • RP ' 0 "',. �� two, /O , i (d / NATURE E>aDDl wan.Ia ma) a ' ."`•,/ / ,3]d . t./j �J/ � e NFA9BRINFAp FPATEWYW[YKWAEROHPoTQ • a WNGC . .� I� �` F `_ 1 1 �/ /// 25.4 3 N / l^ t \ ' 54' 1 66 MARCH 4 TR.S t IVJO14 11 ®w 1 • C WOT1O4 IB]OEIIT ND S � A t 6J E e \ WALK DRIVEWAY A �, P.C.C. IJ' A.C. BX Ci7 PACE eRIt 123, IND DI 130010430. PAGE 241; NO C Qb 1�� / NEWSR. NOVEMER12. 1BB AB wBIRAENT R0. 11m OA NOT ITALfl ) Q V ti may' I Eat HIGH O Ax ENElIT F IT,1 A WET1S. Nel .34510 ALI]BF•DB®. ' / I W / 9 1 : :V'i Man et5 Llq IM'.C I✓OEE IF X19 ®i1T.1f@MB811MB(Tx0.]IYI9oE i g J1 J \ � y / RI KWNy WALL � i CONSTRUCTION NO TES 2 ry . Q / /` ry' f ` y 1 YMRW COO RAMOBNLLETI I]1 FET 2 0-� / " `' Y $ o J / f � \_� �V� e - A-0 CURB B a C- VICINITY MAP ® SITE PLAN j ti , a / '° - DRIVEWAY - TYPICAL SECTION W • LL 1' .1000' -O' a- DATE OESGNER NEss1. LYNDIE LANE a Jun. 01;11 0. Ashcroft i.e.e" NS. , j EN GINEERING Site Plan SHEET I ( d Is' CONSULTING JOB ND. DRAFTER Cf W ORN /k 4 � 4 ^ t' . i ,: -a r 42210 Lyndie Lane D 1 091124 DwA /lI 9 C IO . D GREENER �° w _ GROUP caams�Da has .rA T emecula , CA 92590 L ti REV. DFSTAIPnd I BY WE c - Ashcroft DATE J?4 a / neam ROMP= .. .tea OF 2 SHEETS - !Ill NEV PARKING PARKING LOT LOT 1 2➢6R10 1i 0 a 172503 r_ Et.. IXCpo (F10® ( PCA° --- sn..Q I e c i Ttl0 7 I I '1lAm YfR41E� p WAU 1 ill mom Exe•p4_ _y_ I _ 11B-.8".3" mis"rf� --_-_-+, _�. _ I _ I - . j I I j 121403 S • � 1 ! lvuert 3 _— 1 I _ — I - _ — I )1a•m 1 T �� yl �? I j I ¢ 3 eg �e � 1 a� EGLaW __- o- _____ a .__. t r- ...... i - , 1 _ _ __._. _._. _. 1 ' ?` :. _19003 c r . . 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O m 7 N Y y D c orb n, m _ Q: co o-a 7 7 c� 9 z m i s p , 2 4 5 0146 -- mma o � n o m o 0 01 A q ij m p c C Ursa 73 p co m m _. p 0 to , i a z 1 m 5 N • PRE - DEVELOPMENT HYYLOGY CALCULATIONS • Area ID Impervious Area Pervious Area Total Area Length Delta H T'c 2 year storm 10 year storm 100 year storm Acres % Acres % Acres Feet Feet minutes I in /hr Runoff, C Q cfs I in /hr Runoff, C Q cfs I in /hr Runoff, C Q cfs Q` cfs 1.0 0.258 90% 0.029 10% 0.287 169 2 6.0 2.10 0.750 0.452 3.12 0.795 0.712 4.86 0.890 1.241 1.241 2.1 0.040 69% 0.018 31% 0.058 77 19 5.0 2.30 0.870 0.116 3.45 0.880 0.176 5.10 0.890 0.263 2.2 0.050 61% 0.032 39% 0.082 83 19 5.0 2.30 0.830 0.157 3.45 0.850 0.240 5.10 0.880 0.368 2.3 0.224 79% 0.059 21% 0.283 137 6 5.4. 2.54 0.880 0.633 3.32 0.885 0.832 5.10 0.890 1.285 1.820 3.0 0.000 0% 0.067 100% 0.067 29 12 5.0 2.30 0.710 0.109 3.45 0.770 0.178 5.10 0.840 0.287 0.287 4.0 0.018 100% 0.000 0% 0.018 36 6 5.0 2.30 0.710 0.029 3.45 0.770 0.048 5.10 0.900 0.083 0.083 Totals = 0.590 74% 0.205 26% 0.795 1496 2.186 3.527 3.431 • POST - DEVELOPMENT HYYLOGY CALCULATIONS • Area ID Impervious Area Pervious Area Total Area Length Delta H T'c 2 year storm 10 year storm 100 year storm Acres % Acres % Acres Feet Feet minutes I in /hr Runoff, C 0 cfs I in /hr Runoff, C 0 cfs I in /hr Runoff, C 0 cfs Cr cfs 1.0 0.210 73% 0.077 27% 0.287 169 2 6.0 2.10 0.841 0.507 3.12 0.860 0.770 4.86 0.880 1.227 2.1 0.040 69% 0.018 31% 0.058 77 19 5.0 2.30 0.870 0.116 3.45 0.880 0.176 5.10 0.890 0.263 2.2 0.077 94% 0.005 6% 0.082 83 19 5.0 2.30 0.870 0.164 3.45 0.880 0.249 5.10 0.900 0.376 2.3 0.200 71% 0.083 29% 0.283 137 6 5.4 2.54 0.880 0.633 3.32 0.885 0.832 5.10 0.880 1.270 2.990 3.0 0.000 0% 0.067 100% 0.067 29 12 5.0 2.30 0.710 0.109 3.45 0.770 0.178 5.10 0.840 0.287 0.287 4.0 0.018 100% 0.000 0% 0.018 36 6 5.0 2.30 0.710 0.029 3.45 0.770 0.048 5.10 0.900 0.083 0.083 Totals = 0.5 69% 0.250 31% 0.795 1.558 2.252 3.507 3.360 Water Quality Management Plan (WQMP) Lyndie Lane • Appendix D Educational Materials • • Water Quality Management Plan (WQMP) Lyn L • EDUCATION LOG � Namej� �" t� ` , ' �Nanie �, � �•.�'�� ^ � � � Date�� WQMP� Materials: � ' ` �.�' „ ` w �` � �^� , � � � �` = Prov (SvlolbaylYr)` �� . �ItIIted� � � �� y '�� r� _ �r.., _ �.S'SgIlfltllIB� k � �" f �'�"+s k mJ, ? 4� � 's f`.. '� � R' r F �4 .�5-� s Pr.� . ��• � . �� :y c . s,`. s � �. r k ' -..' �o- �.: . . t - � : � � .aa.-:. • � A-18 s. , .:w s z . �. s m i b 4 � � Uyh • 410 N rt , � " s $ r I � rt6e St ■ For more information contact: i I ONLY RAIN IN THE STORM DRAIN Riverside County Flood Control District 1995 Market Street, Riverside, CA 92501 Call Toll Free: 1 - 800 - 506 - 2555 E -mail: flood.fcnpdes @co.riverside.ca.us I or visit ww epa.gov /npdes /stormwater� w www.epa.gov /nps 6 �' A .1111■1■11•111•1111•1 l } ii> Y E1R 06 — .., , A.. , • GLEAN ICATIlt i; ..... I W� tT RAINS Internet MJmst (VRL). flT•/M'e••••• gc• �; 3 „ a `, «g �� <.�n "of ef. T. a ":1'J P, w ic, e"�e I ,_ , s Y # ' � r�o:� cna.�„s Foss nKraM '''F'' ' , , , f C $ '' r -¢ r x� . , � _. ' ; `T e e ect$ o a ll u :-., ,,,,,..,,,-,-. ,, - „ , , ,, . ,,, , , ...„.„,, , ,,,v-,-;:,, ,, , , ,,,,-.,;51„-,t-,,,,,,,------- :.,,,,,,,,,,,,,,,,,, -vr ,,,,} --, - - - - ,--,-z-,--- .. - - , --, ,, , , .::.-,;.:. , 3,.-r,-,.. 1 :.,,,„,,,,, . ,,,,,..4.,,,,,,,,;,,*,-,..:.,, , , .-,-,:. .. fv. a . '''''.,;./Tr.e.. : ----, . . -, 4 - - Polluted stormwater runoff can have many adverse effects on plants, fish, - Stormwater runoff occurs when precipitation animals, and people. s ; n i from rain or snowmelt flows over the ground. • Sediment can cloud the water .7 ,,, impervious surfaces like driveways, sidewalks, and make it difficult or ; '''' --'.' - - and streets prevent stormwater from impossible for aquatic plants to naturally soaking into the ground. grow. Sediment also can ' z destroy aquatic habitats. y ` • Excess nutrients can cause , ,, - >w .. , , algae blooms. When algae die, - , g : fr , they sink to the bottom and decompose h . s in a process that removes oxygen from { , , `i the water. Fish and other aquatic - ,. ,fie � 3 � 8 '� � z ��, ; > �,, � ° � ti organisms can't exist in water with low '�' / • W,�...1, ` m SD F ' - .- dissolved oxygen levels. ;, '.. i.4, t y, , + . i ! • Bacteria and other pathogens can wash ,.. h ii 1 into swimming areas and create health i hazards, often making beach closures -,' , _ _ _ a necessary. , �; a y x. ,. e- rc..., . -; _ • Debris — plastic bags, six -pack rings, bottles, and cigarette butts — washed into waterbodies can choke, suffocate, or r -.4.- .- disable aquatic life like ducks, fish, turtles, and birds. , • Household hazardous wastes like insecticides, pesticides, paint, x``03 q.. - s solvents, used motor oil, and other auto fluids can poison aquatic life. -. Land animals and people can become sick or die from eating diseased fish and shellfish or ingesting _ . .. ;.:� � . _, _ .. polluted water. Stormwater can pick up debris, chemicals, dirt, and other • Polluted stormwater often pollutants and flow into a storm sewer system or directly to affects soourceurce drinking tur s. This, in turn, can a lake, stream, river, wetland, or coastal water. Anything that ._ affect human health and enters a storm sewer system is discharged untreated into -- a increase drinking water a. p the waterbodies we use for swimming, fishing, and providing '� ` "'"" �� treatment costs. drinking water. " III , • • • . „ , i- I' J..I 1 • Il r Ar S en �!� _ �� ...� � A uto care �, , -r _ „f Washing your car and ;k ��ic : - degreasing auto parts at home ; Ediu taTioo. 14 e i al to. 9ut9 people bclavtomr. - — "r . can send detergents and other _ ► '�' g St aid rketa rcemc &o c douse watit teeidt M v • # . . contaminants through the '. storm sewer system. Dumping _' pat e d6 will be amid Reegek at �� automotive fluids into storm (Wteateed rho a , wa tbody. p'tOP Xt 4 p drains has the same result as Coata& elf&ae.a.& Auck as aiseeliivo'N, pe6Ti.!,ides, p er; dumping the materials directly into a waterbody. of ida ,Cl(�Gfi £ CQ )lKj �o oil ad o • Use a commercia '. car wash that treats or Oow itpoat Vex ocmta tli powd at ueta Avg Atha. recycles its wastewater, or wash your car on Permeable Pavement Traditional concrete and your yard so the water infiltrates into the asphalt don't allow water to soak into the ground. ground. instead these surfaces rely on storm drains to Lawn care I divert unwanted water. Permeable pavement • Repair leaks and dispose of used auto fluids systems allow rain and snowmelt to soak through, Excess fertilizers II and batteries at designated drop -off or decreasing stormwater runoff. and pesticides recycling locations. applied to lawns . , Rain Barrels — You can and gardens wash collect rainwater from off and pollute Septic `. Pet waste 7 rooftops in mosquito- I streams. In a nd , ' ” s - proof containers. The addition, yard -h Pet waste can be ., �- . - water can be used later on ' clippings and Leaking major so of = g and ; � m � - lawn or garden areas. - leaves can wash poorly bacteria and j. K into storm drains and contribute maintained wt excess nutrients ` 1 ' ,,, Rain Gardens and nutrients and organic matter to streams. septic in local waters. _ '.* w Grassy Swales Specially "'' • Don't overwater your lawn. Consider systems release nutrients and • When walking -- -' designed areas planted pathogens (bacteria and using a soaker hose instead of a your pet, with native plants can provide natural places for viruses) that can be picked up remember to pick up the rainwater to collect sprinkler. by stormwater and discharged P P — T waste and dispose of it • Use pesticides and fertilizers waterbodies. into nearby waterbodi P properly. Flushing pet and soak into the ground. Rain from sparingly. When use is necessary, use Pathogens can cause public waste is the best disposal t rooftop areas or paved these chemicals in the recommended health problems and method. Leaving pet waste:: -�-, areas can be diverted amounts. Use organic mulch or safer environmental concerns. on the ground increases ` '' `yi ,� into these areas rather pest control methods whenever public health risks by .� - w than into storm drains. possible. • Inspect your system every allowing harmful bacteria 3 years and pump your g • Compost or mulch yard waste. Don't tank as necessary (every 3 and nutrients to wash into Vegetated Filter Strips — Filter strips are areas of leave it in the street or sweep it into to 5 years). the storm drain and native grass or plants created along roadways or storm drains or streams. eventually into local streams. They trap the pollutants stormwater • Don't dispose of waterbodies. picks up as it flows across driveways and streets. • Cover piles of dirt or mulch being household hazardous used in landscaping projects. waste in sinks or toilets. =_= i rr Dirt, oil, and debris that collect in Erosion controls that aren't maintained can cause 1 1 _. i;, 4 ti %k . 4 parking lots and paved areas can be excessive amounts of sediment and debris to be ii •• .' ;r i =- *-. ' ' • • s, washed into the storm sewer system carried into the stormwater system. Construction - • : i� ' 3 -°,,., e J_ and eventually enter local v €hicles can leak fuel, oil, and other harmful fluids 3 „EA-'',: ' j waterbodies. that can be picked up by stormwater and -- , 4y F _':i' � :' P P 1- -, - p. • Sweep up litter and debris from deposited into local waterbodies. sidewalks, driveways and parking lots, • Divert stormwater away from disturbed or • -'�"' - I - ` =ti., .K '`0_ Commerc;a . ' especia aroun storm drains. exposed areas of the construction site. , xu • Cover grease storage and dumpsters • (Install silt fences, vehicle mud removal areas, "'� + . ; and keep them clean to avoid leaks. vegetative cover, and other sediment and -t ' , erosion controls and properly maintain them, * . y °-- ' - ' • Report any chemical spill to the locals - - especially after rainstorms. ' hazardous waste cleanup team. ; They'll know the best way to keep • Prevent soil erosion by minimizing disturbed spills from harming the environment. I areas during construction projects, and seed i , F and mulch bare areas as soon as possible. 9 ' ° C �. "' �. Lack of vegetation on streambanks can lead to erosion. Overgrazed pastures can also / .. rM f rjC� contribute xcessive amounts of sediment to local waterbodies. Excess fertilizers and u amd • • • pesticides can poison aquatic animals and lead to destructive algae blooms. Livestock in . :. :. ---.; streams can contaminate waterways with bacteria, making them unsafe for human contact. . at') l it es • Keep livestock away from streambanks and provide _ them a water source away from waterbodies • • 14:' = ' tk' . • Store and apply manure away from waterbodies and in accordance with a nutrient management plan. . ► ,- ` , + , i = .,Fwl. ' ' - • Vegetate riparian areas along waterways. `� � r ` __ - — • — , -" • Rotate animal grazing to prevent soil erosion in fields. „ • Apply fertilizers and pesticides according to label .. . - -- ...._. instructions to save money and minimize pollution. Or ' .. ' Uncovered fueling stations allow spills to be `► washed into storm drains. Cars waiting to be , repaired can leak fuel, oil, and other harmful `:` - Improperly managed logging operations can result in erosion and fluids that can be picked up by stormwater. , 1 ; -4 sedimentation. g ':.�. . : . .- : -°` a --- • Clean up spills immediately and properly Y • Conduct preharvest planning to prevent erosion and lower costs. dispose of cleanup materials. ,r ,�'�' '"'�"'= • Use logging methods and equipment that minimize soil disturbance. • Provide cover over fueling stations and — design or retrofit facilities for spill .. g � ow-� • Plan and design skid trails, yard areas, and truck access roads to containment. 'r"-,` .,, , � , . " minimize stream crossings and avoid disturbing the forest floor. `: • -&-i: :. • Properly maintain fleet vehicles to prevent r . •'' - • Construct stream crossings so that they minimize erosion and physical oil, gas, and other discharges from being changes to streams. washed into local waterbodies. • Expedite revegetation of cleared ar ♦Install and maintain oil/was parators. • glir Where c. stormwater • , ,..,_„. pollution come from? ...%."‘ .....1:C,L -...:ilcuic be ,::. Storrnwater pollution has !Tony sources. When it ''.- rains, rainwater carries pollutants such as motor oil ..0,,.. Stormwater anti-freeze trash grease. and dirt from streets and - t .,,, IL' , .. : 4,1,1‘.A. alC.- I: 1/421.1.i‘ parking lots to the nearest storm drain. Runoff water frurn lawns and landscaped areas can carry pesticides and fertilqers into the storm drains. Even Pollution activities such as washing our cars can result in detergents dirt and grease making their way into the storm drains Help Keep One of tho most serious stormwater pollution __ : , u . i.bteirs is the Our Water Clean! , , , , . . .. illegal disposal or dumping" of wastes ,.... -.,.- •-• ' ,i ,,. into lbe storm drain -- .•....,,,...:-: 440 - -- ,- - - --';.-< ,--7.- To receive your free ,..,. -----„ ....._ _ system. - State laws ..- - . / ' - a I . . - ,--c \c" and loc,a1 ordinances .-- ""a"" c . if ,..2.. .,,„,.„ guide on 20 ways you ., prohibit durnpang of 1# , ...,.„ can help protect our , .. ., ..„,::. motor od pel waste, -• - . , - . 1 ., • \ii,,,„ paints and oth -- er —--11. water... .:-A OW - . ci). otiotants into ho r . . ,.. 4 , ....- --term drain system I ' For information on the i',J' „7.211 r i a ' ; • disposal of household _ _. ______ Did you know that the sewer , -----___,___ .- ..., hazardous waste... ___________ system and the storm drain ; . . _ . ,._.- i These lvvi..i systems are completely different The To receive a list of water that goes down the sinks in your home or . 7L' business is treated by a wastewater treatment plant recyclers in your -:, . . r septic tanks system Water that enters a storm , area... - .. Jan i flow, directly without treatment to our local / l 1 , ,, L"' — system are not the same? . i 7 and akes- 11-1 ,,•--:: :: ---_ 41:41 :#- 1 4, CALL 1 , •_. . ....-:- •,/, 1 — ....4 ,,,, • Ac› ,. ir:i...-.. — -- ----_„/ . 1. 0 • 4‘,4 Is stormwater pollution a ';:-, problem only when it rains? ..-..„,.. -, ...' - - , - No. Throughout ii .-.. ,;;y part , : . . ..itants .. , ,,,,..,,,, ,, ,,,„,,,.,,,,,,,,,,,.. . _. accumulate on nn ets 41 parmng Ic ., is Si. i_ rain finally does fall, the rain water carries . . pollutants into the storm . drains Surprisingly, , - ...... .. - . . .. ,,,.,. water runoff from the .!\, daily use of garden , .4.. hoses and sprinklers 4 ;: can n a l s o car r r y .s..,.,..>:,,:...-:.-r';, Cities and County at Riverside Ito th stern W l r l pollutants n e storm drain system Cj1 1 ■ hould know Iasi Stor W - r ..,;.,..,---',:,:„. 1 r; , '" leanWater - ._....;. ,,,,,. .,,,„:„. , . -- ---4 . --- PROTECTION PROGRAM - , , 1 ' , ie.__ _ ,-. Jeseljeueouron_._.. .. .. . . . ...,__ . gforrn IF plit. Rain is typically a welcomed sight in Riverside County. It cleans the air and provides us with a valuable resource - water. Sure, rainwater is usually clean. But, as it flows over our streets and yards, it carries pollutants into the storm drains. e So, what's the problem? Be a part of the solution! The problem is . . . storm drains ultimately carry these pollutants Everyone contributes a little to the directly to our rivers, lakes and streams.. problem ... now, it's time for all of us to: Stormwater pollution causes as much as 60% of our 6 Never pour anything down a storm drain; water pollution problem. It jeopardizes the quality of our waterways and poses a threat to groundwater resources 6 Use good housekeeping practices with lawn if pollutants percolate through soil. f r' 1� care chemicals, oil, gasoline, pet wastes, s f . , paints and solvents; 7 : fi r ,` ,, Some major pollutants include: ~` • Recycle and safely dispose of used oil and household hazardous wastes; • girt and grime from streets; 6 Purchase non -toxic products; • Motor oil, antifreeze, paints, and household , " -? cleaners that are dumped into the storm drains 6 Report illegal dumping to local authorities; • Contaminants from car and truck exhaust: • Pesticides and fertilizers from lawns and gardens: ` f 4 Tell others about stormwater pollution and • Soil erosion from yards and hillsides; ,•� encourage them to help; • Biological contaminants from animal waste; r Call the StormWaterfCleanWater Protection • Litter, leaves and lawn clippings: 1 l_ I / • Contaminates from illegal dumping. ?''h,•/ ,� ( i / Program for a booklet on environmentally a / ' .. _ : safe alternatives for the home and garden. ' _;t - . • .., . _____ illimmuswim 4.1.1■AlLowri • • IP Helpful telephone numbers and links: Do you know ... where the water actually goes? WATER AGENCY LIST StormWatei in Riverside County r t Pollut , tE l t. , Storm Drains are not City of Banning (951) 922 -3130 � r I connected to sanitary City of Beaumont (951) 769 -8520 ( sewer systems and City of Blythe (760) 922 -6161 What you should know for... City Coachella (760) 398 -3502 1, , treatment plants! Coachella ella a Valley Water District 760 398 -2651 City of Corona (951) 736-2259 OUTDOOR CLEANING Desert Center, CSA #51 (760) 227 -3203 Eastern Municipal Water District (951) 928 -3777 The primary purpose of storm drains is to carry rain water away from developed areas to prevent Elsinore Valley MWD (951) 674 -3146 ACTIVITIES AND flooding. Pollutants discharged to storm drains are conveyed directly into rivers, lakes and streams. Farm Mutual Water Company (951) 244 -4198 Soaps, degreasers, automotive fluids, litter and a host of other materials washed off buildings, City of Hemet (951) 765 -3712 sidewalks, plazas, parking areas, vehicles and equipment must be properly managed to prevent the tdyttwitd Water District (951) 659-2143 NON -POINT SOURCE pollution of rivers, lakes and streams. Jurupa Community Services District (951) 360 -8795 Lake Hemet MWD (951) 658 -3241 Preventing pollution is the best way to protect the environment. In addition, it is much easier and less Lee Lake Water District (951)277 -1414 DISCHARGES costly than deaning up 'after the fact." March Air Force Base (951) 656 -7000 Mission Springs Water District (760) 329 -6448 ?x , x City of Palm Springs (760) 323 - 8253 The Ci and County of Riverside Rancho Caballero (951) 780 -9272 Rancho California Water District (951) 9 -49551 1 � 296 -69 Ripley, CSA #62 (760 . Regional Water Quality Control Board lr City of Riverside (951) 351 -6170 Rubidoux Community Services District (951) 684 -7580 } A WATERSHED is an area of land that catches rain and snow, then drains or seeps into a marsh, i r Silent Valle Club, Inc "' y (951)849 849-4501 , a .. ,. stream, river, lake or groundwater. Watersheds come in all shapes and sizes, crossing county, state, Valley Sanitary District (760) 347.2356 r / ° and national boundaries, therefore many of our activities at home, work or play affect the quality of our Western Municipal Water District (951) 789 -5000 t " � �� ' ''" watersheds. Yucaipa Valley Water District (909) 797 -5117 �' '+..� • -- ! In accordance with state and federal law to protect our watersheds, the CITIES AND COUNTY OF To report illegal dumping into storm drains or RIVERSIDE have adopted ordinances for stormwater management and discharge control to prohibit clogged storm drains, please call: the discharge of wastes into the storm drain system or local surface waters. This INCLUDES 1 -800 -506 -2555 discharge of wash water from outdoor cleaning activities which may contain pollutants such as oil, of # y grease, detergent, degreasers, trash, pet waste or other materials. Online resources include: For disposal of wash water tram: Riverside County Flood Control District outreach ( � •- ,A • materials page: J Sidewalk, plaza or parking lot cleaning • rJ} • �; www .floodcontrol.co.riverside.ca.us J Vehicle washing or detailing • ` � / r eh. AI *, rf ell1 California Storm Water Quality Association J Building exterior cleaning -'' ` ' ` --�-- . •, X www,casaa.oro or www.cabmohandbooks.com •f " '�- ..c ♦ , it • r , J Waterproofing - i �4 j p4 State Water Resources Control Board, Water Quality J Equipment cleaning or degreasing www.swrcb,ca.aovlstormwtrf index.htmt U.S. Environmental Protection Agency PLEASE NOTE: Check with your Regional Water Quality Control Board, local municipal www. eoa. ooviovotlo2home foroaramslbusorac.htnt government and water agencies on what the restrictions are in your area Help Protect Our Waterways! Use These Guidelines For Outdoor Cleaning Activities and Wash Water Disposal DO NOT . . . dispose of water DO NOT . . . Dispose of leftover USING CLEANING AGENTS: OTHER TIPS TO HELP PROTECT OUR containing soap or any other type of cleaning agents into the gutter. storm drain WATER... If you must use soap, use biodegradable/ cleaning agent into a storm drain or water or sanitary sewer. phosphate -free cleaners. Although the use of SCREENING WASH WATER body. This is a direct violation of state and /or nontoxic cleaning products is strongly local regulations. Because wash water from Do . . . understand that wash water encouraged, do understand that these A thorough dry cleanup before washing cleaning parking areas may contain metallic (without soap) used to remove dust from a products can degrade water quality. The exterior surfaces such as building and decks brake pad dust, oil and other automotive clean vehicle may be discharged to a street discharge of these products into the street, without loose paint, sidewalks, or plaza fluids, litter, food wastes and other or drain. Wash water from sidewalk, plaza, gutters, storm drain system or waterways is areas, should be sufficient to protect materials, if should never be discharged to and building surface cleaning may go into a prohibited by local ordinances and the State receiving waters. HOWEVER, if any debris Water Code. Avoid use of petroleum based (solids) could enter storm drains or remain in a street, gutter or storm drain. street or storm drain IF ALL of the following the gutter or street after cleaning, wash water cleaning products. conditions are met: should first pass through a "20 mesh" or finer DO . . . dispose of small amounts of 1. The surface being washed is free of screen to catch the solid materials, the mesh wash water from cleaning building f� ,� should then be disposed of in the trash. exteriors, sidewalks or plazas onto residual oil, debris and other materials ° . by using dry cleanup methods (i.e., I} ......1 DRAIN INLET PROTECTION /CONTAINMENT & landscaped or unpaved surfaces, provided sweeping, and cleaning any oil or 1' t\6".. I J COLLECTION OF WASH WATER you have the owner's permission and the chemical spills with rags or other discharge will not cause nuisance problems absorbent materials before using �„ — • Sand bags can be used to create a barrier or flow into a street or storm drain. water). + .. 2;:.-- ..—,- _,� around storm drain inlets. `� 0 Plugs or rubber mats can be used to Do ... check with your sanitary sewer 2. Washing is done with water only, not temporarily seal storm drain openings. agency's policies and requirements with soap or other cleaning materials. rig / -- concerning wash water disposal. Wash 3. You have not used the water to remove (� —,, 4 • Containment pads, temporary berms or water from outdoor cleaning activities may paint from surfaces during cleaning. — ► vacuum brooms can be used to contain be acceptable for disposal to the sanitary .I !t, and collect wash water. sewer with specific p ermission. See the list CALL -800- 506 -2555 �� % ., fi EQUIPMENT AND SUPPLIES _ . on the back of this flyer for phone numbers i 7 of the sanitary sewer agencies in your area. TO REPORT ILLEGAL POLLUTING 1 ,. Special materials such as absorbents, storm OF STORM DRAINS drain plugs and seals, small sump pumps, When cleaning surfaces with a high - pressure and vacuum booms are available from many Do . . . Understand that mobile auto o ,` va% -Y Rq, washer or steam cleaning methods, vendors. For more information, check detailers should divert wash water to :' , * f ,' additional precautions should be taken to catalogs such as New Pig (800 -468 -4647, landscaped or dirt areas. Be aware that c ,, i% Q prevent the discharge of pollutants into the www.newpig.com), Lab Safety Supply (800 - soapy wash water may damage o4 storm drain system. These two methods of 356- 0783), C &H (800- 558 - 9966), and W.W. landscaping. Residual wash water may i surface cleaning, as compared to the use of a Grainger (800- 994 - 9174); or call the remain on paved surfaces to evaporate. low-pressure hose, can remove additional Cleaning Equipment Trade Association (800 - Residues should be swept up and disposed or visit materials that can contaminate local 441 -0111) or the Power Washers of North of www .floodcontrol.co.riverside.ca.us waterways. America (800- 393 - PWNA). 4110 41110 • Roof Runoff Controls SD -11 • _ " �. Design Objectives 4 - i � Q Maximize Infiltration �� -- p Provide Retention z f/ 2 Slow Runoff . - ' '' c `. . a' ,,. i. •. Minimize Impervious Land .:11. ."' - 7- 4c - r ,, Coverage _ Prohibit Dumping of Improper ... '_ Materials 3 © Contain Pollutants �A ; i t?' , «.. 1 "`' Collect and Convey t Ram Garden Description Various roof runoff controls are available to address stormwater that drains off rooftops. The objective is to reduce the total volume and rate of runoff from individual lots, and retain the pollutants on site that may be picked up from roofing materials and atmospheric deposition. Roof runoff controls consist of directing the roof runoff away from paved areas and mitigating flow to the storm drain system through one of several general • approaches: cisterns or rain barrels; dry wells or infiltration trenches; pop-up emitters, and foundation planting. The first three approaches require the roof runoff to be contained in a gutter and downspout system. Foundation planting provides a vegetated strip under the drip line of the roof. Approach Design of individual lots for single- family homes as well as lots for higher density residential and conunercial structures should consider site design provisions for containing and infiltrating roof runoff or directing roof runoff to vegetative swales or buffer areas. Retained water can be reused for watering gardens, lawns, and trees. Benefits to the environment include reduced demand for potable water used for irrigation, unproved stormwater quality, increased groundwater recharge, decreased runoff volume and peak flows, and decreased flooding potential. Suitable Applications Appropriate applications include residential, commercial and industrial areas planned for development or redevelopment. Design Considerations Designing New Installations Cisterns or Rain Barrels One method of addressing roof runoff is to direct roof downspouts .- � 4 `" to cisterns or rain barrels. A cistern is an above ground storage vessel with either a manually operated valve or a permanently open outlet. Roof runoff is temporarily stored and then released A S f 1 • • for irrigation or infiltration between storms. The number of rain �C January 2003 California Stormwater BMP Handbook 1 of 3 New Development and Redevelopment www.cabmphandbook.com SD-11 Roof Runoff Controls � Uarrels needed is a function of the rooftop area. Some low implct developers reconunend that every house have at least 2 rain Uarrels, with a miniinuin storage capacity of i000 liters. Roof barrels seive several puiposes including mitigating tl�e first flush from the roof wlucl� has a l�igl� volume, amount of cont�minants, and therinal load. Several types of rain Uarrels �re commercially available. Consideration must be giveu to selectii�g rain Uarrels that are vector proof and cl�ildproo£ In addition, some barrels are designed witli a Uypass v11ve that filters out grit and otl�er contlmin�nts and routes overflow to a solk-a�vay pit or rain garden. If tl�e cistern has an operaUle v11ve, tlie valve c1n Ue closed to store stonmvater for irrigatio�� or infiltration Ueriveen stoilus. T7�is system requires continual monitoring by the resident or grottnds crews, Uut provides greater fle�ciUility in w�ter storage and inetering. If a cistern is provided �vith an oper�ble vnlve and wnter is stored inside for long periods, the cisteru nmst Ue covered to prevent mosquitoes froin Ureeding. A cistern system witl� a permai�ently open outlet can also provide for inetering storm�vater ranoff. If tl�e cistern outlet is sigiuficantly smaller tl�an the size of the downspout inlet (say i/a to I/z inch diameter), runoff will Uuild up inside tl�e cisteru during storms, vid will e�npty out slowly after peak intensities suUside. T7�is is a feasible way to mitig�te the peak flow increases caused Uy rooftop impeivious 11nd coverage, especially for tl�e frequent, small storms. Dry wel(s m�d bifiltratioi: Trenches Roof dowtispouts can Ue directed to dry wells or infiltration trenches. A diy well is constructed Uy excavating a hole in the ground and filling it with vi opeu graded aggregate, and allowing the • water to fill tl�e diy �vell and infiltrlte lfter the storm event. An underground connection froin the downspout conveys water into tlie dry �vell, �llowing it to be stored in the voids. To ininimize seclimentation froin lateral soil movement, die sides and top of the stone storage inatrix c�n be wrapped in a permeaUle filter flUiic, thougl� tlie Uottom inay remain open. A pei�forated observation pipe can Ue inserted vertically into tl�e diy well to allow for inspection and mlii�tenance. In practice, dry wells receiving runoff from single roof dowuspouts have Ueen successful over long peiiods Uecause they contain very little sediinent. 11iey must be sized according to d�e ninount of rooftop iunoff received, but are typically 4 to 5 feet square, and 2 to 3 feet deep, with a minimum of i-foot soil cover over the top (maximum depth of io feet). To protect the foundation, dry wells inust Ue set away from tl�e Uuilding at least io feet. The,y must be installed in solids that accommodate i��filtration. In poorly drained soils, diy wells l�nve veiy limited feasibility. Infiltration trencl�es function in a similar manner and would Ue particularly effective for larger roof arels. An infiltrltion h•encl� is 1 long, narrow, rock-filled tr•encl� witl� no outlet tliat receives stornnvater ivnoff. T'hese are desci7Ued nuder Treatment Controls. Pop-iip Drninage Err�itter Roof do�vnspouts can Ue directed to an widerground pipe that dayligl�ts some distance fi•om tl�e Uuilding fomidation, releasing the roof ivnoff througl� a pop-up emitter. Similar to a pop-up iriig�tion head, the emitter only opens when there is flow fro�n the roof. The emitter remains flusl� to the ground duiing diy periods, for ense of lawn or laudscape maintenance. • 2 of 3 Califomla Stormwater BMP Handbook January 2003 New Development and Redevelopment www.ca bmpha n d book. co m Roof Runoff Controls SD -11 • Foundation Planting Landscape planting can be provided around the base to allow increased opportunities for stormwater infiltration and protect the soil from erosion caused by concentrated sheet flow coming off the roof. Foundation plantings can reduce the physical impact of water on the soil and provide a subsurface matrix of roots that encourage infiltration. These plantings must be sturdy enough to tolerate the heavy runoff sheet flows, and periodic soil saturation. Redeveloping Existing Installations Various jurisdictional stormwater management and mitigation plans (SUSMP, WQMP, etc.) define "redevelopment" in terms of amounts of additional impervious area, increases in gross floor area and /or exterior construction, and land disturbing activities with structural or impervious surfaces. The definition of " redevelopment" must be consulted to determine whether or not the requirements for new development apply to areas intended for redevelopment. If the definition applies, the steps outlined under "designing new installations" above should be followed. Supplemental Information Examples ■ City of Ottawa's Water Links Surface —Water Quality Protection Program • City of Toronto Downspout Disconnection Program • City of Boston, MA, Rain Barrel Demonstration Program • Other Resources Hager, Marty Catherine, Stormwater, "Low - Impact Development ", January /February 2003. www. stormh2o.cont Low Impact Urban Design Tools, Low Impact Development Design Center, Beltsville, MD. www.lid-stormwater.net Start at the Source, Bay Area Stormwater Management Agencies Association, 1999 Edition • January 2003 California Stormwater BMP Handbook 3 of 3 New Development and Redevelopment www.cabmphandbook.com Efficient Irrigation SD -12 • %' Design Objectives y Maximize Infiltration ►�"° RI Provide Retention Slow Runoff Minimize Impervious Land • - Coverage Prohibit Dumping of Improper Materials Contain Pollutants Collect and Convey Description Irrigation water provided to landscaped areas may result in excess irrigation water being conveyed into storinwater drainage systems. Approach Project plan designs for development and redevelopment should include application methods of • irrigation water that minimize runoff of excess irrigation water into the stormwater conveyance system. Suitable Applications Appropriate applications include residential, commercial and industrial areas planned for development or redevelopment. (Detached residential single - family homes are typically excluded from this requirement.) Design Considerations Designing New Installations The following methods to reduce excessive irrigation runoff should be considered, and incorporated and implemented where determined applicable and feasible by the Permittee: • Employ rain - triggered shutoff devices to prevent irrigation after precipitation. ■ Design irrigation systems to each landscape area's specific water requirements. • Include design featuring flow reducers or shutoff valves triggered by a pressure drop to control water loss in the event of broken sprinkler heads or lines. • Implement landscape plans consistent with County or City water conservation resolutions, which may include provision of water sensors, programmable irrigation times (for short cycles), etc. A • January 2003 California Stormwater BMP Handbook 1 of 2 New Development and Redevelopment www.cabmphandbooks.com SD -12 Efficient Irrigation • Design timing and application methods of irrigation water to minimize the runoff of excess irrigation water into the storm water drainage system. • Group plants with similar water requirements in order to reduce excess irrigation runoff and promote surface filtration. Choose plants with low irrigation requirements (for example, native or drought tolerant species). Consider design features such as: - Using mulches (such as wood chips or bar) in planter areas without ground cover to minimize sediment in runoff - Installing appropriate plant materials for the location, in accordance with amount of sunlight and climate, and use native plant materials where possible and /or as recommended by the landscape architect - Leaving a vegetative barrier along the property boundary and interior watercourses, to act as a pollutant filter, where appropriate and feasible - Choosing plants that minimize or eliminate the use of fertilizer or pesticides to sustain growth • Employ other comparable, equally effective methods to reduce irrigation water runoff. Redeveloping Existing Installations • Various jurisdictional stormwater management and mitigation plans (SUSMP, WQMP, etc.) define "redevelopment" in terms of amounts of additional impervious area, increases in gross floor area and /or exterior construction, and land disturbing activities with structural or impervious surfaces. The definition of " redevelopment" must be consulted to determine whether or not the requirements for new development apply to areas intended for redevelopment. If the definition applies, the steps outlined under "designing new installations" above should be followed. Other Resources A Manual for the Standard Urban Stormwater Mitigation Plan (SUSMP), Los Angeles County Department of Public Works, May 2002. Model Standard Urban Storm Water Mitigation Plan (SUSMP) for San Diego County, Port of San Diego, and Cities in San Diego County, February 14, 2002. Model Water Quality Management Plan (WQMP) for County of Orange, Orange County Flood Control District, and the Incorporated Cities of Orange County, Draft February 2003. Ventura Countywide Technical Guidance Manual for Stormwater Quality Control Measures, July 2002. 1 2 of 2 California Stormwater BMP Handbook January 2003 New Development and Redevelopment www.cabmphandbooks.com Storm Drain Signage SD -13 • Design Objectives Maximize Infiltration Provide Retention Slow Runoff Minimize Impervious Land Coverage . . r,: 0 Prohibit Dumping of Improper • Materials i, gar f , f Contain Pollutants Collect and Convey Description Waste materials dumped into storm drain inlets can have severe impacts on receiving and ground waters. Posting notices regarding discharge prohibitions at storm drain inlets can prevent waste dumping. Storm drain signs and stencils are highly visible source controls that are typically placed directly adjacent to storm drain inlets. • Approach The stencil or affixed sign contains a brief statement that prohibits dumping of improper materials into the urban runoff conveyance system. Storm drain messages have become a popular method of alerting the public about the effects of and the prohibitions against waste disposal. Suitable Applications Stencils and signs alert the public to the destination of pollutants discharged to the storm drain. Signs are appropriate in residential, commercial, and industrial areas, as well as any other area where contributions or dumping to storm drains is likely. Design Considerations Storm drain message markers or placards are recommended at all storm drain inlets within the boundary of a development project. The marker should be placed in clear sight facing toward anyone approaching the inlet from either side. All storm drain inlet locations should be identified on the development site map. Designing New Installations The following methods should be considered for inclusion in the project design and show on project plans: E'. • Provide stenciling or labeling of all storm drain inlets and catch basins, constructed or modified, within the project area with prohibitive language. Examples include "NO DUMPING • ASQA January 2003 California Stormwater BMP Handbook 1 of 2 New Development and Redevelopment www.cabmphandbooks.com SD -13 Storm Drain Signage • — DRAINS TO OCEAN" and /or other graphical icons to discourage illegal dumping. • Post signs with prohibitive language and /or graphical icons, which prohibit illegal dumping at public access points along channels and creeks within the project area. Note - Some local agencies have approved specific signage and /or storm drain message placards for use. Consult local agency stormwater staff to determine specific requirements for placard types and methods of application. Redeveloping Existing Installations Various jurisdictional stormwater management and mitigation plans (SUSMP, WQMP, etc.) define "redevelopment" in terms of amounts of additional impervious area, increases in gross floor area and /or exterior construction, and land disturbing activities with structural or impervious surfaces. If the project meets the definition of "redevelopment ", then the requirements stated under " designing new installations" above should be included in all project design plans. Additional Information Maintenance Considerations • Legibility of markers and signs should be maintained. If required by the agency with jurisdiction over the project, the owner /operator or homeowner's association should enter into a maintenance agreement with the agency or record a deed restriction upon the property title to maintain the legibility of placards or signs. • Placement • Signage on top of curbs tends to weather and fade. • Signage on face of curbs tends to be worn by contact with vehicle tires and sweeper brooms. Supplemental Information Examples • Most MS4 programs have storm drain signage programs. Some MS4 programs will provide stencils, or arrange for volunteers to stencil storm drains as part of their outreach program. Other Resources A Manual for the Standard Urban Stormwater Mitigation Plan (SUSMP), Los Angeles County Department of Public Works, May 2002. Model Standard Urban Storm Water Mitigation Plan (SUSMP) for San Diego County, Port of San Diego, and Cities in San Diego County, February 14, 2002. Model Water Quality Management Plan (WQMP) for County of Orange, Orange County Flood Control District, and the Incorporated Cities of Orange County, Draft February 2003. Ventura Countywide Technical Guidance Manual for Stormwater Quality Control Measures, July 2002. • 2 of 2 California Stormwater BMP Handbook January 2003 New Development and Redevelopment www.cabmphandbooks.com Pervious Pavements SD -20 • Design Objectives L irs +Y.' y ' p Maximize Infiltration • jai El Provide Retention Or , " � : Mx R Y � , El Slow Runoff • ` +� 0 Minimize Impervious Land _ -`S -. ' ' __ -- ' Coverage '' .. Prohibit Dumping of Improper y Materials ifii u w .„ wri ,., 0 -- Contain Pollutants .,11, 1 } _ 1.R 7. Collect and Convey Description Pervious paving is used for light vehicle loading in parking areas. The term describes a system comprising a load - bearing, durable surface together with an underlying layered structure that temporarily stores water prior to infiltration or drainage to a controlled outlet. The surface can itself be porous such that water infiltrates across the entire surface of the material (e.g., grass and gravel surfaces, porous concrete and porous asphalt), or can be built up of impermeable • blocks separated by spaces and joints, through which the water can drain. This latter system is termed 'permeable' paving. Advantages of pervious pavements is that they reduce runoff volume while providing treatment, and are unobtrusive resulting in a high level of acceptability. Approach Attenuation of flow is provided by the storage within the underlying structure or sub base, together with appropriate flow controls. An underlying geotextile may permit groundwater recharge, thus contributing to the restoration of the natural water cycle. Alternatively, where infiltration is inappropriate (e.g., if the groundwater vulnerability is high, or the soil type is unsuitable), the surface can be constructed above an impermeable membrane. The system offers a valuable solution for drainage of spatially constrained urban areas. Significant attenuation and improvement in water quality can be achieved by permeable pavements, whichever method is used. The surface and subsurface infrastructure can remove both the soluble and fine particulate pollutants that occur within urban runoff. Roof water can be piped into the storage area directly, adding areas from which the flow can be attenuated. Also, within lined systems, there is the opportunity for stored runoff to be piped out for reuse. Suitable Applications Residential, commercial and industrial applications are possible. The use of permeable pavement may be restricted in cold regions, arid regions or regions with high wind erosion. There are some specific disadvantages associated with permeable pavement, which are as follows: • ASQ • January 2003 California Stormwater BMP Handbook 1 of 10 New Development and Redevelopment www.cabmphandbooks.com SD -20 Pervious Pavements • • Permeable pavement can become clogged if improperly installed or maintained. However, this is countered by the ease with which small areas of paving can be cleaned or replaced when blocked or damaged. • Their application should be limited to highways with low traffic volumes, axle loads and speeds (less than go mph limit), car parking areas and other lightly trafficked or non- trafficked areas. Permeable surfaces are currently not considered suitable for adoptable roads due to the risks associated with failure on high speed roads, the safety implications of ponding, and disruption arising from reconstruction. • When using un- lined, infiltration systems, there is some risk of contaminating groundwater, depending on soil conditions and aquifer susceptibility. However, this risk is likely to be small because the areas drained tend to have inherently low pollutant loadings. • The use of permeable pavement is restricted to gentle slopes. • Porous block paving has a higher risk of abrasion and damage than solid blocks. Design Considerations Designing New Installations If the grades, subsoils, drainage characteristics, and groundwater conditions are suitable, permeable paving may be substituted for conventional pavement on parking areas, cul de sacs and other areas with light traffic. Slopes should be flat or very gentle. Scottish experience has • shown that permeable paving systems can be installed in a wide range of ground conditions, and the flow attenuation performance is excellent even when the systems are lined. The suitability of a pervious system at a particular pavement site will, however, depend on the loading criteria required of the pavement. Where the system is to be used for infiltrating drainage waters into the ground, the vulnerability of local groundwater sources to pollution from the site should be low, and the seasonal high water table should be at least 4 feet below the surface. Ideally, the pervious surface should be horizontal in order to intercept local rainfall at source. On sloping sites, pervious surfaces may be terraced to accommodate differences in levels. Design Guidelines The design of each layer of the pavement must be determined by the likely traffic loadings and their required operational life. To provide satisfactory performance, the following criteria should be considered: • The subgrade should be able to sustain traffic loading without excessive deformation. • The granular capping and sub -base layers should give sufficient load - bearing to provide an adequate construction platform and base for the overlying pavement layers. • The pavement materials should not crack of suffer excessive rutting under the influence of traffic. This is controlled by the horizontal tensile stress at the base of these layers. 11111 2 of 10 California Stormwater BMP Handbook January 2003 New Development and Redevelopment www.cahmphandbooks.com Pervious Pavements SD -20 There is no current structural design method specifically for pervious pavements. Allowances should be considered the following factors in the design and specification of materials: • Pervious pavements use materials with high permeability and void space. All the current UK pavement design methods are based on the use of conventional materials that are dense and relatively irnpermeable. The stiffness of the materials must therefore be assessed. • Water is present within the construction and can soften and weaken materials, and this must be allowed for. • Existing design methods assume full friction between layers. Any geotextiles or geomembranes must be carefully specified to minimize loss of friction between layers. • Porous asphalt loses adhesion and becomes brittle as air passes through the voids. Its durability is therefore lower than conventional materials. The single sized grading of materials used means that care should be taken to ensure that loss of finer particles between unbound layers does not occur. Positioning a geotextile near the surface of the pervious construction should enable pollutants to be trapped and retained close to the surface of the construction. This has both advantages and disadvantages. The main disadvantage is that the filtering of sediments and their associated pollutants at this level may hamper percolation of waters and can eventually lead to surface ponding. One advantage is that even if eventual maintenance is required to reinstate infiltration, only a limited amount of the construction needs to be disturbed, since the sub -base below the geotextile is protected. In addition, the pollutant concentration at a high level in the structure allows for its release over time. It is slowly transported in the stormwater to lower levels where chemical and biological processes may be operating to retain or degrade pollutants. The design should ensure that sufficient void space exists for the storage of sediments to limit the period between remedial works. • Pervious pavements require a single size grading to give open voids. The choice of materials is therefore a compromise between stiffness, permeability and storage capacity. • Because the sub -base and capping will be in contact with water for a large part of the time, the strength and durability of the aggregate particles when saturated and subjected to wetting and drying should be assessed. • A uniformly graded single size material cannot be compacted and is liable to move when construction traffic passes over it. This effect can be reduced by the use of angular crushed rock material with a high surface friction. In pollution control terms, these layers represent the site of long term chemical and biological pollutant retention and degradation processes. The construction materials should be selected, in addition to their structural strength properties, for their ability to sustain such processes. In general, this means that materials should create neutral or slightly alkaline conditions and they should provide favorable sites for colonization by microbial populations. • January 2003 California Stormwater BMP Handbook 3 of 10 New Development and Redevelopment www.cabmphandbooks.com SD -20 Pervious Pavements • Construction /Inspection Considerations • Permeable surfaces can be laid without cross -falls or longitudinal gradients. • The blocks should be lain level • They should not be used for storage of site materials, unless the surface is well protected from deposition of silt and other spillages. • The pavement should be constructed in a single operation, as one of the last items to be built, on a development site. Landscape development should be completed before pavement construction to avoid contamination by silt or soil from this source. • Surfaces draining to the pavement should be stabilized before construction of the pavement. ■ Inappropriate construction equipment should be kept away from the pavement to prevent damage to the surface, sub -base or sub - grade. Maintenance Requirements The maintenance requirements of a pervious surface should be reviewed at the time of design and should be clearly specified. Maintenance is required to prevent clogging of the pervious surface. The factors to be considered when defining maintenance requirements must include: • Type of use • Ownership • Level of trafficking ■ The local environment and any contributing catchments Studies in the UK have shown satisfactory operation of porous pavement systems without maintenance for over ro years and recent work by Imbe et al. at 9th ICUD, Portland, 2002 describes systems operating for over 20 years without maintenance. However, performance under such regimes could not be guaranteed, Table 1 shows typical recommended maintenance regimes: 4 of 10 California Stormwater BMP Handbook January 2003 New Development and Redevelopment www.cabmphandbooks.com Pervious Pavements SD -20 Table 1 Typical Recommended Maintenance Regimes Activity Schedule • Minimize use of salt or grit for de -icing • Keep landscaped areas well maintained Ongoing • Prevent soil being washed onto pavement • Vacuum clean surface using conunercially available sweeping machines at the following times: - End of winter (April) 2/3 x per year - Mid - summer (July / August) - After Autumn leaf -fall (November) • Inspect outlets Annual • If routine cleaning does not restore infiltration rates, then reconstruction of part of the whole of a pervious surface may be required. • The surface area affected by hydraulic failure should be lifted for inspection of the internal materials to identify the location and needed (infrequent) As extent of the blockage. Maximum 15 -20 years • Surface materials should be lifted and replaced after brush cleaning. Geotextiles may need complete replacement. • Sub- surface layers may need cleaning and replacing. • Removed silts may need to be disposed of as controlled waste. Permeable pavements are up to 25 % cheaper (or at least no more expensive than the traditional forms of pavement construction), when all construction and drainage costs are taken into account. (Accepting that the porous asphalt itself is a more expensive surfacing, the extra cost of which is offset by the savings in underground pipework etc.) (Niemczynowicz, et al., 1987) Table 1 gives US cost estimates for capital and maintenance costs of porous pavements (Landphair et al., 2000) Redeveloping Existing Installations Various jurisdictional stormwater management and mitigation plans (SUSMP, WQMP, etc.) define "redevelopment" in terms of amounts of additional impervious area, increases in gross floor area and /or exterior construction, and land disturbing activities with structural or impervious surfaces. The definition of " redevelopment" must be consulted to determine whether or not the requirements for new development apply to areas intended for redevelopment. If the definition applies, the steps outlined under "designing new installations" above should be followed. • January 2003 California Stormwater BMP Handbook 5 of 10 New Development and Redevelopment www.cabmphandbooks.com SD-20 Pervious Pavements r Additional Information Cost Considerntions PermeaUle pavemeuts u•e up to 25 % cl�eaper (or �t le�st no more expensive tl�an tl�e traditional forms of pavement constiuction), when all coustruction �nd dr�inage costs are taken into account (Accepting that tl�e porous asphalt itself is � more expensive surfacing, the elctra cost oF wl�icl� is offset by the savings in nnderground pipework etc.) (Niemczynowicz, et al., 198'7) Table 2 gives US cost estimates for capital and maintenance costs of porous pavements (Landpl�air et 11., 2000) � • G of 10 CaliFornia Stormwater BMP Handbook January 2003 � . New Development and Redevelopment www. ca bmpha nd books. com • • • Pervious Pavements SD -20 Table 2 Engineer's Estimate for Porous Pavement Porous Pavement !'tc lea/ Quant. 1 Quint. 2 Qanat. 3 Quint_ 4 Quaat.5 Item 1 tits Price Year Acre WS Tot Acre WS ..'"1' , Acre WS Total Acre WS T ota l Acre WS T4)1a1 Grading SY 12.00 604 $1.208 1209 $2,418 1812 S3.624 2419 $4.838 3020 16,040 Paveng SY $19 00 212 _ $4.028 424 18.056 636 112,084 848 S16.112 1060 1.20.140 Excavation CY 1.3.60 201 $724 403 $1,451 604 S2.174 806 $2,902 1008 13,629 Filter Fabric SY $1.15 700 $805 1400 1.1.610 2000 1.2.300 2800 $3,220 3600 14,140 Stone Pill CY 1.16.00 201 $3.216 403 16,448 604 $9.664 806 $12,896 1008 $16,128 Sand CY 17.00 100 1700 200 $1.400 300 12.100 400 $2,800 500 $3,500 Sight Well EA 1300.00 2 $600 3 1901) 4 11,200 7 $2,100 7 $2.100 Seeding LF 10.05 644 $32 1288 $64 1932 $97 2576 S129 3220 1161 Check Dam CY S35 00 0 $0 O S0 0 50 0 SO 0 SO Total Construction Costs 110,105 $19,929 129,619 140,158 149,798 Construction Costs Amortized $505 1.996 11,481 12.008 12,490 for 20 Years Annual Maintenance Expense Item 1 inii% Price < +clra (?Want. 1 total Ott l T ota l Otani Cola? Quint. J Total Otint. Tula? Year Acre V, S Acre 3 Acre WS Acre WS A cre WS Sweeping AC $250.00 6 1 1.1.500 2 13.000 3 $4.500 4 16.000 5 17,500 Washing PC $250.00 6 1 $1.500 ' 2 13,000 3 $4,500 4 16.000 5 $7,500 Inspection MH $20.00 5 5 $100 5 5100 5 $100 5 $100 5 S100 Deep Clean PC $450.00 0 5 1 $225 2 5450 3 1675 3 9 18 78 5 11,125 Total Annual Maintanancs Expanse 13,960 $7,792 111,651 115,483 119,370 January 2003 California Stormwater BMP Handbook i of 10 New Development and Redevelopment www.cabmphandbooks.com SD -20 Pervious Pavements Other Resources Abbott C.L. and Comino- Mateos L. 2001. In situ performance monitoring of an infiltration drainage system and field testing of current design procedures. Journal CIWEM, 15(3), pp.198- 202. Construction Industry Research and Information Association (CIRIA). 2002. Source Control using Constructed Pervious Surfaces C582, London, SWiP 3AU. Construction Industry Research and Information Association (CIRIA). 2000. Sustainable urban drainage systems - design manual for Scotland and Northern Ireland Report C521, London, SWiP 3AU. Construction Industry Research and Information Association ( CIRIA). 2000 C522 Sustainable urban drainage systems - design manual for England and Wales, London, SW1P 3AU. Construction Industry Research and Information Association (CIRIA). RP448 Manual of good practice for the design, construction and maintenance of infiltration drainage systems for stormwater runoff control and disposal, London, SWiP 3AU. Dierkes C., Kuhlmann L., Kandasamy J. & Angelis G. Pollution Retention Capability and Maintenance of Permeable Pavements. Proc 9th International Conference on Urban Drainage, Portland Oregon, September 2002. Hart P (2002) Permeable Paving as a Stormwater Source Control System. Paper presented at Scottish Hydraulics Study Group 14th Annual seminar, SUDS. 22 March 2002, Glasgow. Kobayashi M., 1999. Stormwater runoff control in Nagoya City. Proc. 8 th Int. Conf. on Urban Storm Drainage, Sydney, Australia, pp. Landphair, H., McFalls, J., Thompson, D., 2000, Design Methods, Selection, and Cost Effectiveness of Stormwater Quality Structures, Texas Transportation Institute Research Report 1837-1, College Station, Texas. Legret M, Colandini V, Effects of a porous pavement with reservior strucutre on runoff water:water quality and the fate of heavy metals. Laboratoire Central Des Ponts et Chaussesss Macdonald K. & Jefferies C. Performance Comparison of Porous Paved and Traditional Car Parks. Proc. First National Conference on Sustainable Drainage Systems, Coventry June 2001. Niemczynowicz J, Hogland W, 1987: Test of porous pavements performed in Lund, Sweden, in Topics in Drainage Hydraulics and Hydrology. BC. Yen (Ed.), pub. Int. Assoc. For Hydraulic Research, pp 19 -80. Pratt C.J. SUSTAINABLE URBAN DRAINAGE — A Review of published material on the performance of various SUDS devices prepared for the UK Environment Agency. Coventry University, UK December 2001. Pratt C.J., 1995. Infiltration drainage — case studies of UK practice. Project Report 8 of 10 California Stormwater BMP Handbook January 2003 New Development and Redevelopment www.cabmphandbooks.com Pervious Pavements SD -20 r 22,Construction Industry Research and Information Association, London, SW1P 3AU; also known as National Rivers Authority R & D Note 485 Pratt. C. J., 1990. Permeable Pavements for Stormwater Quality Enhancement. In: Urban Stormwater Quality Enhancement - Source Control, retrofitting and combined sewer technology, Ed. H.C. Torno, ASCE, ISBN 087262 7594, pp. 1 3 1 -1 55 Raimbault G., 1997 French Developments in Reservoir Structures Sustainable water resources I the 21st century. Malmo Sweden Schluter W. & Jefferies C. Monitoring the outflow from a Porous Car Park Proc. First National Conference on Sustainable Drainage Systems, Coventry June 2001. Wild, T.C., Jefferies, C., and D'Arcy, B.J. SUDS in Scotland — the Scottish SUDS database Report No SR(o2)o9 Scotland and Northern Ireland Forum for Environmental Research, Edinburgh. In preparation August 2002. • • January 2003 California Stormwater BMP Handbook 9 of 10 New Development and Redevelopment www.cabmphandbooks.com SD -20 Pervious Pavements • GeolexlAe ........_: _..._'........_. .... Permeable r mea 11e . [ , . 1 Overflow • . • I ♦ it lusher _ - Permeable T treatme , - • • • • • Sub-base Impermeable disposal GeotethIe Memtaaue or reuse Inf llration (a( Pervious pavement used for attenuation (bi Pervious pavement used for infiltration Schematics of a Pervious Pavement System • 1 10 of 10 California Stormwater BMP Handbook January 2003 New Development and Redevelopment www.cabmphandbooks.com Trash Storage Areas SD -32 • Design Objectives Description Trash storage areas are areas where a trash receptacle (s) are Maximize Infiltration located for use as a repository for solid wastes. Stormwater Provide Retention runoff from areas where trash is stored or disposed of can be Slow Runoff polluted. In addition, loose trash and debris can be easily transported by water or wind into nearby storm drain inlets, Minimize Impervious Land channels, and /or creeks. Waste handling operations that maybe Coverage sources of stormwater pollution include dumpsters, litter control, Prohibit Dumping of Improper and waste piles. Materials El Contain Pollutants Approach Collect and Convey This fact sheet contains details on the specific measures required to prevent or reduce pollutants in stormwater runoff associated with trash storage and handling. Preventative measures including enclosures, containment structures, and impervious pavements to mitigate spills, should be used to reduce the likelihood of contamination. Suitable Applications Appropriate applications include residential, commercial and industrial areas planned for development or redevelopment. (Detached residential single - family homes are typically excluded from this requirement.) • Design Considerations Design requirements for waste handling areas are governed by Building and Fire Codes, and by current local agency ordinances and zoning requirements. The design criteria described in this fact sheet are meant to enhance and be consistent with these code and ordinance requirements. Hazardous waste should be handled in accordance with legal requirements established in Title 22, California Code of Regulation. Wastes from commercial and industrial sites are typically hauled by either public or commercial carriers that may have design or access requirements for waste storage areas. The design criteria in this fact sheet are recommendations and are not intended to be in conflict with requirements established by the waste hauler. The waste hauler should be contacted prior to the design of your site trash collection areas. Conflicts or issues should be discussed with the local agency. Designing New Installations Trash storage areas should be designed to consider the following structural or treatment control BMPs: • Design trash container areas so that drainage from adjoining roofs and pavement is diverted around the area(s) to avoid run -on. This might include berming or grading the waste handling area to prevent run -on of stormwater. • Make sure trash container areas are screened or walled to prevent off -site transport of trash. A S Q • JTY R\tnsT lrttineArrn January 2003 California Stormwater BMP Handbook 1 of 2 New Development and Redevelopment www.cabmphandbooks.com SD -32 Trash Storage Areas • Use lined bins or dumpsters to reduce leaking of liquid waste. • Provide roofs, awnings, or attached lids on all trash containers to minimize direct precipitation and prevent rainfall from entering containers. • Pave trash storage areas with an impervious surface to mitigate spills. • Do not locate storm drains in immediate vicinity of the trash storage area. • Post signs on all dumpsters informing users that hazardous materials are not to be disposed of therein. Redeveloping Existing Installations Various jurisdictional stormwater management and mitigation plans (SUSMP, WQMP, etc.) define "redevelopment" in terms of amounts of additional impervious area, increases in gross floor area and /or exterior construction, and land disturbing activities with structural or impervious surfaces. The definition of " redevelopment" must be consulted to determine whether or not the requirements for new development apply to areas intended for redevelopment. If the definition applies, the steps outlined under "designing new installations" above should be followed. Additional Information Maintenance Considerations • The integrity of structural elements that are subject to damage (i.e., screens, covers, and signs) must be maintained by the owner /operator. Maintenance agreements between the local agency and the owner /operator may be required. Some agencies will require maintenance deed restrictions to be recorded of the property title. If required by the local agency, maintenance agreements or deed restrictions must be executed by the owner /operator before improvement plans are approved. Other Resources A Manual for the Standard Urban Stormwater Mitigation Plan (SUSMP), Los Angeles County Department of Public Works, May 2002. Model Standard Urban Storm Water Mitigation Plan (SUSMP) for San Diego County, Port of San Diego, and Cities in San Diego County, February 14, 2002. Model Water Quality Management Plan (WQMP) for County of Orange, Orange County Flood Control District, and the Incorporated Cities of Orange County, Draft February 2003. Ventura Countywide Technical Guidance Manual for Stormwater Quality Control Measures, July 2002. 1111 2 of 2 California Stormwater BMP Handbook January 2003 New Development and Redevelopment www.cabmphandbooks.com Building & Grounds Maintenance SC -41 Objectives • Cover • Contain • Educate 1444 • Reduce /Minimize " • Product Substitution 4 Targeted Constituents Description Sediment ✓ Stormwater runoff from building and grounds maintenance Nutrients ✓ activities can be contaminated with toxic hydrocarbons in Trash solvents, fertilizers and pesticides, suspended solids, heavy Metals ✓ metals, abnormal pH, and oils and greases. Utilizing the Bacteria ✓ protocols in this fact sheet will prevent or reduce the discharge of Oil and Grease pollutants to stormwater from building and grounds organics maintenance activities by washing and cleaning up with as little water as possible, following good landscape management practices, preventing and cleaning up spills immediately, keeping debris from entering the storm drains, and maintaining the stormwater collection system. Approach Reduce potential for pollutant discharge through source control pollution prevention and BMP implementation. Successful implementation depends on effective training of employees on applicable BMPs and general pollution prevention strategies and objectives. Pollution Prevention • Switch to non -toxic chemicals for maintenance when possible. • Choose cleaning agents that can be recycled. • Encourage proper lawn management and landscaping, SQ California including use of native vegetation. St ormw ater • Quality Association January 2003 California Stormwater BMP Handbook 1 of 5 Industrial and Commercial www.cabmphandbooks.com SC-41 Building & Grounds Maintenance • • Encourage use of Integrated Pest Management techniques for pest control. • Encourage proper onsite recycling of yard trimmings. • Recycle residual paints, solvents, lumber, and other material as much as possible. Suggested Protocols Pressure Washing of Buildings, Rooftops, and Other Large Objects • In situations where soaps or detergents are used and the surrounding area is paved, pressure washers must use a water collection device that enables collection of wash water and associated solids. A sump pump, wet vacuum or similarly effective device must be used to collect the runoff and loose materials. The collected runoff and solids must be disposed of properly. • If soaps or detergents are not used, and the surrounding area is paved, wash runoff does not have to be collected but must be screened. Pressure washers must use filter fabric or some other type of screen on the ground and /or in the catch basin to trap the particles in wash water runoff. • If you are pressure washing on a grassed area (with or without soap), runoff must be dispersed as sheet flow as much as possible, rather than as a concentrated stream. The wash runoff must remain on the grass and not drain to pavement. • Landscaping Activities • Dispose of grass clippings, leaves, sticks, or other collected vegetation as garbage, or by composting. Do not dispose of collected vegetation into waterways or storm drainage systems. • Use mulch or other erosion control measures on exposed soils. Building Repair, Remodeling, and Construction • Do not dump any toxic substance or liquid waste on the pavement, the ground, or toward a storm drain. • Use ground or drop cloths underneath outdoor painting, scraping, and sandblasting work, and properly dispose of collected material daily. • Use a ground cloth or oversized tub for activities such as paint mixing and tool cleaning. • Clean paintbrushes and tools covered with water -based paints in sinks connected to sanitary sewers or in portable containers that can be dumped into a sanitary sewer drain. Brushes and tools covered with non - water -based paints, finishes, or other materials must be cleaned in a manner that enables collection of used solvents (e.g., paint thinner, turpentine, etc.) for recycling or proper disposal. • Use a storm drain cover, filter fabric, or similarly effective runoff control mechanism if dust, grit, wash water, or other pollutants may escape the work area and enter a catch basin. This is particularly necessary on rainy days. The containment device(s) must be in place at the • beginning of the work day, and accumulated dirty runoff and solids must be collected and disposed of before removing the containment device(s) at the end of the work day. 2 of 5 California Stormwater BMP Handbook January 2003 Industrial and Commercial www.cabmphandbooks.com Building & Grounds Maintenance SC -41 411 • If you need to de -water an excavation site, you may need to filter the water before discharging to a catch basin or off -site. If directed off -site, you should direct the water through hay bales and filter fabric or use other sediment filters or traps. • Store toxic material under cover during precipitation events and when not in use. A cover would include tarps or other temporary cover material. Mowing, Trimming, and Planting • Dispose of leaves, sticks, or other collected vegetation as garbage, by composting or at a permitted landfill. Do not dispose of collected vegetation into waterways or storm drainage systems. • Use mulch or other erosion control measures when soils are exposed. • Place temporarily stockpiled material away from watercourses and drain inlets, and berm or cover stockpiles to prevent material releases to the storm drain system. • Consider an alternative approach when bailing out muddy water: do not put it in the storm drain; pour over landscaped areas. • Use hand weeding where practical. Fertilizer and Pesticide Management • • Follow all federal, state, and local laws and regulations governing the use, storage, and disposal of fertilizers and pesticides and training of applicators and pest control advisors. • Use less toxic pesticides that will do the job when applicable. Avoid use of copper -based pesticides if possible. • Do not use pesticides if rain is expected. • Do not mix or prepare pesticides for application near storm drains. • Use the minimum amount needed for the job. • Calibrate fertilizer distributors to avoid excessive application. • Employ techniques to minimize off - target application (e.g., spray drift) of pesticides, including consideration of alternative application techniques. • Apply pesticides only when wind speeds are low. • Fertilizers should be worked into the soil rather than dumped or broadcast onto the surface. • Irrigate slowly to prevent runoff and then only as much as is needed. • Clean pavement and sidewalk if fertilizer is spilled on these surfaces before applying irrigation water. • Dispose of empty pesticide containers according to the instructions on the container label. 11111 January 2003 California Stormwater BMP Handbook 3 of 5 Industrial and Commercial www.cabmphandbooks.com SC -41 Building & Grounds Maintenance • Use up the pesticides. Rinse containers, and use rinse water as product. Dispose of unused pesticide as hazardous waste. • Implement storage requirements for pesticide products with guidance from the local fire department and County Agricultural Commissioner. Provide secondary containment for pesticides. Inspection • Inspect irrigation system periodically to ensure that the right amount of water is being applied and that excessive runoff is not occurring. Minimize excess watering and repair leaks in the irrigation system as soon as they are observed. Training • Educate and train employees on pesticide use and in pesticide application techniques to prevent pollution. • Train employees and contractors in proper techniques for spill containment and cleanup. • Be sure the frequency of training takes into account the complexity of the operations and the nature of the staff. Spill Response and Prevention • Keep your Spill Prevention Control and Countermeasure (SPCC) Plan up -to -date. 111/ • Place a stockpile of spill cleanup materials, such as brooms, dustpans, and vacuum sweepers (if desired) near the storage area where it will be readily accessible. • Have employees trained in spill containment and cleanup present during the loading /unloading of dangerous wastes, liquid chemicals, or other materials. • Familiarize employees with the Spill Prevention Control and Countermeasure Plan. • Clean up spills immediately. Other Considerations Alternative pest /weed controls may not be available, suitable, or effective in many cases. Requirements Costs • Cost will vary depending on the type and size of facility. • Overall costs should be low in comparison to other BMPs. Maintenance Sweep paved areas regularly to collect loose particles. Wipe up spills with rags and other absorbent material immediately, do not hose down the area to a storm drain. 4 of 5 California Stormwater BMP Handbook January 2003 Industrial and Commercial www.cabmphandbooks.com Building & Grounds Maintenance SC -41 Supplemental Information Further Detail of the BMP Fire Sprinkler Line Flushing Building fire sprinkler line flushing may be a source of non - stormwater runoff pollution. The water entering the system is usually potable water, though in some areas it may be non - potable reclaimed wastewater. There are subsequent factors that may drastically reduce the quality of the water in such systems. Black iron pipe is usually used since it is cheaper than potable piping, but it is subject to rusting and results in lower quality water. Initially, the black iron pipe has an oil coating to protect it from rusting between manufacture and installation; this will contaminate the water from the first flush but not from subsequent flushes. Nitrates, poly- phosphates and other corrosion inhibitors, as well as fire suppressants and antifreeze may be added to the sprinkler water system. Water generally remains in the sprinkler system a long time (typically a year) and between flushes may accumulate iron, manganese, lead, copper, nickel, and zinc. The water generally becomes anoxic and contains living and dead bacteria and breakdown products from chlorination. This may result in a significant BOD problem and the water often smells. Consequently dispose fire sprinkler line flush water into the sanitary sewer. Do not allow discharge to storm drain or infiltration due to potential high levels of pollutants in fire sprinkler line water. References and Resources California's Nonpoint Source Program Plan http: // www.swrcb.ca.gov /nps /index.html Clark County Storm Water Pollution Control Manual http://www.co.clark.wa.us/pubworks/bmpman.pdf King County Storm Water Pollution Control Manual http: / /dnr.metrokc.gov /wlr /dss /spcm.htm Mobile Cleaners Pilot Program: Final Report. 1997. Bay Area Stormwater Management Agencies Association (BASMAA). http: / /www.basmaa.org/ Pollution from Surface Cleaning Folder. 1996. Bay Area Stormwater Management Agencies Association (BASMAA). http: / /www.basmaa.org/ Santa Clara Valley Urban Runoff Pollution Prevention Program http: / /www.scvurppp.org The Storm Water Managers Resource Center http: / /www.stormwatercenter.net/ • January 2003 California Stormwater BMP Handbook 5 of 5 Industrial and Commercial www.cabmphandbooks.com Parking /Storage Area Maintenance SC -43 • Objectives ' t . Cover • o , r . A • N f r �� Contain ti r 5 ' " � • Educate tx ' ► f 4 • ,f ` ft 'fr. ■Reduce /Minimize i F t 1- . ° A 1? i , r , , °'v • Product Substitution } 1 . �, 4 R A ' +t ' S d:∎ M `' pI y; . "S ' z ' :'. , !'� t t r, • • Targeted Constituents Description Sediment It Parking lots and storage areas can contribute a number of Nutrients substances, such as trash, suspended solids, hydrocarbons, oil Trash ✓ and grease, and heavy metals that can enter receiving waters Metals ✓ • through stormwater runoff or non - stormwater discharges. The Bacteria protocols in this fact sheet are intended to prevent or reduce the Oil and Grease ✓ discharge of pollutants from parking /storage areas and include Organics ✓ using good housekeeping practices, following appropriate cleaning BMPs, and training employees. Approach The goal of this program is to ensure stormwater pollution prevention practices are considered when conducting activities on or around parking areas and storage areas to reduce potential for pollutant discharge to receiving waters. Successful implementation depends on effective training of employees on applicable BMPs and general pollution prevention strategies and objectives. Pollution Prevention • Encourage alternative designs and maintenance strategies for impervious parking lots. (See New Development and Redevelopment BMP Handbook) • • Keep accurate maintenance logs to evaluate BMP implementation. C * S �. A III CaIWomla Stormwatsr Illy Assoclaq°° January 2003 California Stormwater BMP Handbook 1 of 4 Industrial and Commercial www.cabmphandbooks.com SC -43 Parking /Storage Area Maintenance Suggested Protocols General • Keep the parking and storage areas clean and orderly. Remove debris in a timely fashion. • Allow sheet runoff to flow into biofilters (vegetated strip and swale) and /or infiltration devices. • Utilize sand filters or oleophilic collectors for oily waste in low quantities. • Arrange rooftop drains to prevent drainage directly onto paved surfaces. • Design lot to include semi - permeable hardscape. • Discharge soapy water remaining in mop or wash buckets to the sanitary sewer through a sink, toilet, clean -out, or wash area with drain. Controlling Litter • Post "No Littering" signs and enforce anti - litter laws. • Provide an adequate number of litter receptacles. • Clean out and cover litter receptacles frequently to prevent spillage. • • Provide trash receptacles in parking lots to discourage litter. • Routinely sweep, shovel, and dispose of litter in the trash. Surface Cleaning • Use dry cleaning methods (e.g., sweeping, vacuuming) to prevent the discharge of pollutants into the stormwater conveyance system if possible. • Establish frequency of public parking lot sweeping based on usage and field observations of waste accumulation. • Sweep all parking lots at least once before the onset of the wet season. • Follow the procedures below if water is used to clean surfaces: - Block the storm drain or contain runoff. - Collect and pump wash water to the sanitary sewer or discharge to a pervious surface. Do not allow wash water to enter storm drains. - Dispose of parking lot sweeping debris and dirt at a landfill. • Follow the procedures below when cleaning heavy oily deposits: - Clean oily spots with absorbent materials. • - Use a screen or filter fabric over inlet, then wash surfaces. 2 of 4 California Stormwater BMP Handbook January 2003 Industrial and Commercial www.cabmphandbooks.com Parking /Storage Area Maintenance SC -43 i - Do not allow discharges to the storm drain. - Vacuum /pump discharges to a tank or discharge to sanitary sewer. - Appropriately dispose of spilled materials and absorbents. Surface Repair • Preheat, transfer or load hot bituminous material away from storm drain inlets. • Apply concrete, asphalt, and seal coat during dry weather to prevent contamination from contacting stormwater runoff. • Cover and seal nearby storm drain inlets where applicable (with waterproof material or mesh) and manholes before applying seal coat, slurry seal, etc. Leave covers in place until job is complete and all water from emulsified oil sealants has drained or evaporated. Clean any debris from these covered manholes and drains for proper disposal. • Use only as much water as necessary for dust control, to avoid runoff. • Catch drips from paving equipment that is not in use with pans or absorbent material placed under the machines. Dispose of collected material and absorbents properly. Inspection • • Have designated personnel conduct inspections of parking facilities and stormwater conveyance systems associated with parking facilities on a regular basis. • Inspect cleaning equipment /sweepers for leaks on a regular basis. Training • Provide regular training to field employees and /or contractors regarding cleaning of paved areas and proper operation of equipment. • Train employees and contractors in proper techniques for spill containment and cleanup. Spill Response and Prevention • Keep your Spill Prevention Control and Countermeasure (SPCC) Plan up -to -date. • Place a stockpile of spill cleanup materials where it will be readily accessible or at a central location. • Clean up fluid spills immediately with absorbent rags or material. • Dispose of spilled material and absorbents properly. Other Considerations Limitations related to sweeping activities at large parking facilities may include high equipment costs, the need for sweeper operator training, and the inability of current sweeper technology to remove oil and grease. • January 2003 California Stormwater BMP Handbook 3 of 4 Industrial and Commercial www.cabmphandbooks.com SC -43 Parking /Storage Area Maintenance Requirements Costs Cleaning /sweeping costs can be quite large. Construction and maintenance of stormwater structural controls can be quite expensive as well. Maintenance • Sweep parking lot regularly to minimize cleaning with water. • Clean out oil /water /sand separators regularly, especially after heavy storms. • Clean parking facilities regularly to prevent accumulated wastes and pollutants from being discharged into conveyance systems during rainy conditions. Supplemental Information Further Detail of the BMP Surface Repair Apply concrete, asphalt, and seal coat during dry weather to prevent contamination from contacting stormwater runoff. Where applicable, cover and seal nearby storm drain inlets (with waterproof material or mesh) and manholes before applying seal coat, slurry seal, etc. Leave covers in place until job is complete and all water from emulsified oil sealants has drained or evaporated. Clean any debris from these covered manholes and drains for proper disposal. Only use only as much water as is necessary for dust control to avoid runoff. References and Resources California's Nonpoint Source Program Plan http: // www.swrcb.ca.gov /nps /index.html Clark County Storm Water Pollution Control Manual http://www.co.clark.wa.us/pubworks/bmpman.pdf King County Storm Water Pollution Control Manual http: / /dnr.metrokc.gov /wlr /dss /spcm.htm Pollution from Surface Cleaning Folder. 1996. Bay Area Stormwater Management Agencies Association (BASMAA). http: / /www.basmaa.org/ Oregon Association of Clean Water Agencies. Oregon Municipal Stormwater Toolbox for Maintenance Practices. June 1 998. Santa Clara Valley Urban Runoff Pollution Prevention Program http: / /www.scvurppp.org The Storm Water Managers Resource Center http : / /www.stormwatercenter.net/ • 4 of 4 California Stormwater BMP Handbook January 2003 Industrial and Commercial www.cabmphandbooks.com Drainage System Maintenance SC -44 • = s, ,s-- . ,r= .:. „ wi,5,`:,,'' Objectives ( W •, :.' , '-'+4 10: ■Cover ,ter r ��,# t 4� ■Contain ■ z " t, • Educate r ■ Reduce /Minimize III a�a' "'w" - s Description As a consequence of its function, the stormwater conveyance Targeted Constituents system collects and transports urban runoff and stormwater that Sediment ✓ may contain certain pollutants. The protocols in this fact sheet Nutrients are intended to reduce pollutants reaching receiving waters Trash ✓ through proper conveyance system operation and maintenance. Metals • Approach Bacteria ✓ Oil and Grease Pollution Prevention Organics Maintain catch basins, stormwater inlets, and other stormwater conveyance structures on a regular basis to remove pollutants, reduce high pollutant concentrations during the first flush of storms, prevent clogging of the downstream conveyance system, restore catch basins' sediment trapping capacity, and ensure the system functions properly hydraulically to avoid flooding. Suggested Protocols Catch Basins /Inlet Structures • Staff should regularly inspect facilities to ensure compliance with the following: - Immediate repair of any deterioration threatening structural integrity. - Cleaning before the sump is 40% full. Catch basins should be cleaned as frequently as needed to meet this standard. - Stenciling of catch basins and inlets (see SC34 Waste S Q A California Handling and Disposal). Stormwater • Cluality Association January 2003 California Stormwater BMP Handbook 1 of 6 Industrial and Commercial www.cabmphandbooks.com SC -44 Drainage System Maintenance IIIII • Clean catch basins, storm drain inlets, and other conveyance structures before the wet season to remove sediments and debris accumulated during the summer. • Conduct inspections more frequently during the wet season for problem areas where sediment or trash accumulates more often. Clean and repair as needed. • Keep accurate logs of the number of catch basins cleaned. • Store wastes collected from cleaning activities of the drainage system in appropriate containers or temporary storage sites in a manner that prevents discharge to the storm drain. • Dewater the wastes if necessary with outflow into the sanitary sewer if permitted. Water should be treated with an appropriate filtering device prior to discharge to the sanitary sewer. If discharge to the sanitary sewer is not allowed, water should be pumped or vacuumed to a tank and properly disposed. Do not dewater near a storm drain or stream. Storm Drain Conveyance System • Locate reaches of storm drain with deposit problems and develop a flushing schedule that keeps the pipe clear of excessive buildup. • Collect and pump flushed effluent to the sanitary sewer for treatment whenever possible. Pump Stations • • Clean all storm drain pump stations prior to the wet season to remove silt and trash. • Do not allow discharge to reach the storm drain system when cleaning a storm drain pump station or other facility. • Conduct routine maintenance at each pump station. • Inspect, clean, and repair as necessary all outlet structures prior to the wet season. Open Channel • Modify storm channel characteristics to improve channel hydraulics, increase pollutant removals, and enhance channel /creek aesthetic and habitat value. • Conduct channel modification /improvement in accordance with existing laws. Any person, government agency, or public utility proposing an activity that will change the natural (emphasis added) state of any river, stream, or lake in California, must enter into a Steam or Lake Alteration Agreement with the Department of Fish and Game. The developer - applicant should also contact local governments (city, county, special districts), other state agencies (SWRCB, RWQCB, Department of Forestry, Department of Water Resources), and Federal Corps of Engineers and USFWS. Illicit Connections and Discharges • Look for evidence of illegal discharges or illicit connections during routine maintenance of conveyance system and drainage structures: • - Is there evidence of spills such as paints, discoloring, etc? 2 of 6 California Stormwater BMP Handbook January 2003 Industrial and Commercial www.cabmphandbooks.com Drainage System Maintenance SC -44 III - Are there any odors associated with the drainage system? - Record locations of apparent illegal discharges /illicit connections? - Track flows back to potential dischargers and conduct aboveground inspections. This can be done through visual inspection of upgradient manholes or alternate techniques including zinc chloride smoke testing, fluorometric dye testing, physical inspection testing, or television camera inspection. - Eliminate the discharge once the origin of flow is established. • Stencil or demarcate storm drains, where applicable, to prevent illegal disposal of pollutants. Storm drain inlets should have messages such as "Dump No Waste Drains to Stream" stenciled next to them to warn against ignorant or intentional dumping of pollutants into the storm drainage system. • Refer to fact sheet SC -10 Non - Stormwater Discharges. Illegal Dumping • Inspect and clean up hot spots and other storm drainage areas regularly where illegal dumping and disposal occurs. • Establish a system for tracking incidents. The system should be designed to identify the following: • - Illegal dumping hot spots - Types and quantities (in some cases) of wastes - Patterns in time of occurrence (time of day /night, month, or year) - Mode of dumping (abandoned containers, "midnight dumping" from moving vehicles, direct dumping of materials, accidents /spills) - Responsible parties • Post "No Dumping" signs in problem areas with a phone number for reporting dumping and disposal. Signs should also indicate fines and penalties for illegal dumping. • Refer to fact sheet SC -10 Non - Stormwater Discharges. Training • Train crews in proper maintenance activities, including record keeping and disposal. • Allow only properly trained individuals to handle hazardous materials /wastes. • Have staff involved in detection and removal of illicit connections trained in the following: - OSHA - required Health and Safety Training (29 CFR 1910.120) plus annual refresher • training (as needed). January 2003 California Stormwater BMP Handbook 3 of 6 Industrial and Commercial www.cabmphandbooks.com SC -44 Drainage System Maintenance IIII - OSHA Confined Space Entry training (Cal -OSHA Confined Space, Title 8 and Federal OSHA 29 CFR 1910.146). - Procedural training (field screening, sampling, smoke /dye testing, TV inspection). Spill Response and Prevention • Investigate all reports of spills, leaks, and /or illegal dumping promptly. • Clean up all spills and leaks using "dry" methods (with absorbent materials and /or rags) or dig up, remove, and properly dispose of contaminated soil. • Refer to fact sheet SC -11 Spill Prevention, Control, and Cleanup. Other Considerations (Limitations and Regulations) • Clean -up activities may create a slight disturbance for local aquatic species. Access to items and material on private property may be limited. Trade -offs may exist between channel hydraulics and water quality /riparian habitat. If storm channels or basins are recognized as wetlands, many activities, including maintenance, may be subject to regulation and permitting. • Storm drain flushing is most effective in small diameter pipes (36 -inch diameter pipe or Less, depending on water supply and sediment collection capacity). Other considerations associated with storm drain flushing may include the availability of a water source, finding a III downstream area to collect sediments, liquid /sediment disposal, and prohibition against disposal of flushed effluent to sanitary sewer in some areas. • Regulations may include adoption of substantial penalties for illegal dumping and disposal. • Local municipal codes may include sections prohibiting discharge of soil, debris, refuse, hazardous wastes, and other pollutants into the storm drain system. Requirements Costs • An aggressive catch basin cleaning program could require a significant capital and O &M budget. • The elimination of illegal dumping is dependent on the availability, convenience, and cost of alternative means of disposal. The primary cost is for staff time. Cost depends on how aggressively a program is implemented. Other cost considerations for an illegal dumping program include: - Purchase and installation of signs. - Rental of vehicle(s) to haul illegally- disposed items and material to landfills. - Rental of heavy equipment to remove larger items (e.g., car bodies) from channels. - Purchase of landfill space to dispose of illegally - dumped items and material. • 4 of 6 California Stormwater BMP Handbook January 2003 Industrial and Commercial www.cabmphandbooks.com Drainage System Maintenance SC -44 • Methods used for illicit connection detection (smoke testing, dye testing, visual inspection, and flow monitoring) can be costly and time- consuming. Site - specific factors, such as the level of impervious area, the density and ages of buildings, and type of land use will determine the level of investigation necessary. Maintenance • Two- person teams may be required to clean catch basins with vactor trucks. • Teams of at least two people plus administrative personnel are required to identify illicit discharges, depending on the complexity of the storm sewer system. • Arrangements must be made for proper disposal of collected wastes. • Technical staff are required to detect and investigate illegal dumping violations. Supplemental Information Further Detail of the BMP Storm Drain Flushing Flushing is a common maintenance activity used to improve pipe hydraulics and to remove pollutants in storm drainage systems. Flushing may be designed to hydraulically convey accumulated material to strategic locations, such as an open channel, another point where flushing will be initiated, or the sanitary sewer and the treatment facilities, thus preventing resuspension and overflow of a portion of the solids during storm events. Flushing prevents "plug flow" discharges of concentrated pollutant loadings and sediments. Deposits can hinder the designed conveyance capacity of the storm drain system and potentially cause backwater conditions in severe cases of clogging. Storm drain flushing usually takes place along segments of pipe with grades that are too flat to maintain adequate velocity to keep particles in suspension. An upstream manhole is selected to place an inflatable device that temporarily plugs the pipe. Further upstream, water is pumped into the line to create a flushing wave. When the upstream reach of pipe is sufficiently full to cause a flushing wave, the inflated device is rapidly deflated with the assistance of a vacuum pump, thereby releasing the backed up water and resulting in the cleaning of the storm drain segment. To further reduce impacts of stormwater pollution, a second inflatable device placed well downstream may be used to recollect the water after the force of the flushing wave has dissipated. A pump may then be used to transfer the water and accumulated material to the sanitary sewer for treatment. In some cases, an interceptor structure may be more practical or required to recollect the flushed waters. It has been found that cleansing efficiency of periodic flush waves is dependent upon flush volume, flush discharge rate, sewer slope, sewer length, sewer flow rate, sewer diameter, and population density. As a rule of thumb, the length of line to be flushed should not exceed 700 feet. At this maximum recommended length, the percent removal efficiency ranges between 65- 75% for organics and 55 -65% for dry weather grit /inorganic material. The percent removal efficiency drops rapidly beyond that. Water is commonly supplied by a water truck, but fire hydrants can also supply water. To make the best use of water, it is recommended that reclaimed water be used or that fire hydrant line flushing coincide with storm sewer flushing. January 2003 California Stormwater BMP Handbook 5 of 6 Industrial and Commercial www.cabmphandbooks.com SC -44 Drainage System Maintenance • References and Resources California's Nonpoint Source Program Plan http: // www.swrcb.ca.gov /nps /index.html Clark County Storm Water Pollution Control Manual http: / /www.co. clark.wa.us /pubworks/bmpman.pdf Ferguson, B.K. 1991. Urban Stream Reclamation, p. 324-322, Journal of Soil and Water Conservation. King County Storm Water Pollution Control Manual http: / /dnr.metrokc.gov /wlr /dss /spcm.htm Oregon Association of Clean Water Agencies. Oregon Municipal Stormwater Toolbox for Maintenance Practices. June 1 99 8 . Santa Clara Valley Urban Runoff Pollution Prevention Program http: / /www.scvurppp.org The Storm Water Managers Resource Center http: / /www.stormwatercenter.net United States Environmental Protection Agency (USEPA). 2002. Pollution Prevention /Good Housekeeping for Municipal Operations Storm Drain System Cleaning. On line: http : / /www.epa.gov /npdes /menuofbmps /poll 16.htm • • 6 of 6 California Stormwater BMP Handbook January 2003 Industrial and Commercial www.cabmphandbooks.com Drain Inserts MP -52 • Design Considerations Description ---- Drain inserts are manufactured filters or fabric placed in a drop • Use with other BMPs inlet to remove sediment and debris. There are a multitude of • Fit and Seal Capacity within Inlet inserts of various shapes and configurations, typically falling into one of three different groups: socks, boxes, and trays. The sock consists of a fabric, usually constructed of polypropylene. The fabric may be attached to a frame or the grate of the inlet holds the sock. Socks are meant for vertical (drop) inlets. Boxes are constructed of plastic or wire mesh. Typically a polypropylene "bag" is placed in the wire mesh box. The bag takes the form of the box. Most box products are one box; that is, the setting area and filtration through media occur in the same box. Some products consist of one or more trays or mesh grates. The trays may hold different types of media. Filtration media vary by manufacturer. Types include polypropylene, porous polymer, treated cellulose, and activated carbon. California Experience Targeted Constituents The number of installations is unknown but likely exceeds a © Sediment thousand. Some users have reported that these systems require El Nutrients considerable maintenance to prevent plugging and bypass. El Trash El Metals Advantages Bacteria • • Does not require additional space as inserts as the drain El Oil and Grease inlets are already a component of the standard drainage Organics systems. Removal Effectiveness • Easy access for inspection and maintenance. See New Development and Redevelopment Handbook - Section 5. • As there is no standing water, there is little concern for mosquito breeding. • A relatively inexpensive retrofit option. Limitations Performance is likely significantly less than treatment systems that are located at the end of the drainage system such as ponds and vaults. Usually not suitable for large areas or areas with trash or leaves than can plug the insert. Design and Sizing Guidelines Refer to manufacturer's guidelines. Drain inserts come any many configurations but can be placed into three general groups: socks, boxes, and trays. The sock consists of a fabric, usually constructed of polypropylene. The fabric may be attached to a frame or the grate of the inlet holds the sock. Socks are meant for vertical (drop) inlets. Boxes are constructed of plastic or wire mesh. Typically a polypropylene "bag" is placed in the wire mesh A S Q • box. The bag takes the form of the box. Most box products are January 2003 California Stormwater BMP Handbook 1 of 3 New Development and Redevelopment www.cabmphandbooks.com MP -52 Drain Inserts a one box; that is, the setting area and filtration through media occurs in the same box. One manufacturer has a double -box. Stormwater enters the first box where setting occurs. The stormwater flows into the second box where the filter media is located. Some products consist of one or more trays or mesh grates. The trays can hold different types of media. Filtration media vary with the manufacturer: types include polypropylene, porous polymer, treated cellulose, and activated carbon. Construction /Inspection Considerations Be certain that installation is done in a manner that makes certain that the stormwater enters the unit and does not leak around the perimeter. Leakage between the frame of the insert and the frame of the drain inlet can easily occur with vertical (drop) inlets. Performance Few products have performance data collected under field conditions. Siting Criteria It is recommended that inserts be used only for retrofit situations or as pretreatment where other treatment BMPs presented in this section area used. Additional Design Guidelines Follow guidelines provided by individual manufacturers. Maintenance Likely require frequent maintenance, on the order of several times per year. Cost • The initial cost of individual inserts ranges from less than $ioo to about $2,000. The cost of using multiple units in curb inlet drains varies with the size of the inlet. • The low cost of inserts may tend to favor the use of these systems over other, more effective treatment BMPs. However, the low cost of each unit may be offset by the number of units that are required, more frequent maintenance, and the shorter structural life (and therefore replacement). References and Sources of Additional Information Hrachovec, R, and G. Minton, 2001, Field testing of a sock -type catch basin insert, Planet CPR, Seattle, Washington Interagency Catch Basin Insert Conunittee, Evaluation of Commercially- Available Catch Basin Inserts for the Treatment of Stormwater Runoff from Developed Sites, 1995 Larry Walker Associates, June 1998, NDMP Inlet /In -Line Control Measure Study Report Manufacturers literature Santa Monica (City), Santa Monica Bay Municipal Stormwater /Urban Runoff Project - Evaluation of Potential Catch basin Retrofits, Woodward Clyde, September 24, 1998 • 2 of 3 California Stormwater BMP Handbook January 2003 New Development and Redevelopment www.cabmphandbooks.com Drain Inserts MP -52 Woodward Clyde, June 11, 1996, Parking Lot Monitoring Report, Santa Clara Valley Nonpoint Source Pollution Control Program. • January 2003 California Stormwater BMP Handbook 3 of 3 New Development and Redevelopment www.cabmphandbooks.com Introducing Cl earWater •The ClearWater BMP Curb Inlet Filter BMP The ClearWater BMP is a powerful advancement in sidewalk curb inlet filtration technology. The patent - pending, filter train design allows stormwater flows to be screened, settled, and then filtered, =: �? t '`F all within the confines of an existing curb inlet drain box. This aggressive filtration design significantly reduces 01 :1 concentrations of trash, sediment, 4, 101111111111 • f hydrocarbons, metals, and nutrients. s . - A , • Specifically designed for retrofitting t ! t within the existing curb and 1 gutter infrastructure, it handles it heavy storm flows with ease, dry - weather flows expertly, utilizes m NO osquito free technology and requires no excavation or concrete — modification. The ClearWater 0 Dumping Not. I Live Downstream BMP truly is your curb inlet pollution solution. ,< Features Patent Pending • Fits into existing curb inlets • Non - scouring • Large storage capacity • Easy street level maintenance • No clogging under heavy flows • Durable stainless steel construction • Affordable Benefits • Improves downstream water quality • High removal rate of Total Suspended Solids — 97% • Located close to pollutant sources • Reduces concentrations of trash, sediment, ClearWater S o I u t i o n s TM • hydrocarbons, metals and nutrients • NPDES Compliant — now and in the future STORM DRAIN SPECIALISTS 2259 Lone Oak Lane • Vista, CA 92084 www.ClearWaterBM P.corn Toll Free: 800 - 758 -8817 • F: 760 - 598 -1371 },,. � ' _�.4 � �'"m . � System Operation � �:��,�"'...� '°� .��: �� b r4 �, �< # F The C1earWater BMP is a powerful � t � � advancement in sidewalk curb inlet filtration �; f I��("t" �� technology. Specifically designed for retrofitting "� ��.: ��I�Ii��f i��^ under the sidewalk within the curb and gutter ' system, it handles heavy storm flows with ease, �'' " _ utilizes mosquito free technology, and requires no w: " � �� '�� ,� ii i i I � �-,_ excaval4on or concrete modification. �� '`��,�� r �� , ,� �;� k < a , '3 ,�`� � a The revolutionary design of the C1earWater BMP �«" � t�`�. �;� r ".', r allows storm water to be screened three times, �'��``� �'t �� a °��*� settled three times, make constant surface contact -----, =— with an oil and grease separator, pass through a _��;_.,..- - -� ,_ �:,:_..--, synthefic mesh filter, and finaily pass through a }� - ;.� .t:�_\�� column of porous media comprised of natural �- zeolites, erlite, and activated carbon. Filter media l!` '.� '' �' ' . � P , � �I'"_ �' i I .' can be tailored to site specific needs. These ,�, i; ' '' � media and the unique engineering design of the ` "� filter support containing them; enhances removal , d�""� "'� ��'' of smaller particulates, thus improviilg the quality t�� ,'° �' � of life downstream. � yv � � � ,+ 1 ' =,: r a :- � '� ' c_ �" aiF��...> � . i ��'%� `" ` r .-..—� \ �, � \ �� _.� � .-`_ Performance Testing �� Using the "typical" storm water calculations of 0.2 inches (3,780 gallons) of rain per hour for an ordinary curb inlet, the ClearWater BMP performed very well. Proven testing from San Diego State University shows the C1earWater BMP has removal rates of 97% for total suspended solids (TSS), 86% for oil and grease (O & G), 81% for lead (Pb), and 83% for zinc (Zn). Satisfactory rates of removal were accomplished with heavy metals in solution, a claim that will not be found in most competitors literahxre since most only clean out larger setfled constituents, while the finer materials flow docvnstream contaminating wildlife and beaches. Removal with Mixed-Media Filter at 64 GPM What is your NPDES compliance criteria? - . �-. .M�. ..: � � , �+7yp�ceP�� %�Removal>° ClearWaterBMP T�eatment.Capaciry � with'ClearWater BMP'` : �: �� Rainfall Intensity, Inches/Hr. 0.20 0.25 0.50 �0.75 1.0 TSS: Total Suspended Solids 97 R.O.W. Treatment Capacity, Acres 2.5 2.0 1.0 0.67 0.50 O&G: Oil 8 Grease 86 200 GPM (.46 CFS) before bypassing occurs. Pb: Lead 81 Zn: Zinc 83 C�dC�G1G3�L.14GG°3 i ;"` : � °�,�'"'� ��' � ``��` �` ��.`; : . 57• " � �, 0 0�4� 2259 Lone Oak Lane • Vista, CA 92084 www.ClearWaterBMP.com • Toll Free: 800-758-8817 • F: 760-598-1371 s0.tY RE 'O A∎54 c e- • DENTAL OFFICE WASTE CHEAT SHEET Sq' FRANC %S`O Some dental office wastes can be harmful to human health and the I environment. Therefore, very specific requirements often apply to waste storage, labeling, and disposal. - °, Generators of hazardous and medical wastes must file an v.. • j application with the SF Department of Public Health. Call (415) 252 -3900 for further guidance. In addition, all dental offices must ..�� obtain a wastewater permit or an exemption from the SF Public Utilities Commission. Call (415) 695 -7310 for more information. Amalgam X -Ray Film Includes "scrap" amalgam; amalgam capsules (empty, leaking or Why Hazardous: Contains silver. unusable); contact amalgam (extracted teeth with silver fillings); amalgam pieces captured by vacuum pump filters and screens; sludge Disposal: There are many companies that can reclaim silver from from separators; and, chair -side traps, vacuum pump filters, and screens. the film and the plastic for other products. Recycling is the preferred method of disposal. Why Haiordou -.: Contains mercury. Place in a properly labeled container and dispose of through a Disi Place in a properly labeled container and dispose of licensed hazardous waste hauler /recycler OR the city's VSQG' through a licensed hazardous waste hauler /recycler OR the city's Program. VSQG* Program. Recycling is the preferred method of disposal. Less Toxic Tips: Switch to a digital x -ray. Less Toxic Tips: Mix only the amount of amalgam you will need for a restoration. Stop or cut back on installing amalgam restorations. X -Ray Fixer X -Ray Developer Why Hazardous: Contains silver. Why Hazardous: May contain hydroquinone. Disposal: Place in a properly labeled container and dispose of through a licensed hazardous waste hauler /recycler OR the city's Disprn;+ When developer is used the hydroquinone is depleted. VSQG' Program. Recycling is the preferred method of disposal. Completely used developer can be poured down the drain. All other developer must be placed in a properly labeled container Using a silver recovery unit, up to ten gallons of fixer can be and disposed of through a licensed hazardous waste hauler OR treated on site per month. Recovered silver can be sold to a metal the city's VSQG' Program. reclaimer. Treated fixer must be non - hazardous and in compliance with local discharge limits before it can be poured down the drain. Less Toxic Tips: Switch to a digital x -ray. Contact SFPUC at (415) 695 -7310 for more information. Less Toxic Tips: Switch to a digital x -ray. X -Ray Cleaner May contain chromium compounds. Check Lead Foils, Bite Wings, and Lead Aprons package label or Material Safety Data Sheet (MSDS) for any form of chromium, such as sodium dichromate. Why Hazardous: Contains lead. Dispose If cleaner is hazardous, place in a properly labeled Disposal: Place in a properly labeled container and dispose of container and dispose of through a licensed hazardous waste through a licensed hazardous waste hauler /recycler OR the city's hauler OR the city's VSQG" Program. VSQG' Program. Recycling is the preferred method of disposal. Le. L Switch to digital x -ray. Choose a non - chromium Less Toxic Tips: Switch to a digital x -ray. cleaner or employ mechanical cleaning methods. For more information please visit SFEnvironment.com or call (415) 355 -3700. SFEnvironment Our home. Our city. Our plane; SF Environment is a department of the City and County of San Francisco. Chemical Sterilant Universal Wastes Also known as "chemiclave solutions." Includes mercury thermometers, fluorescent lamps, batteries, blood pressure gauges, etc. Why Hcrzurdou . . Often hazardous, but depends on the concentrations and ingredients. Check with vendor or Material Why Hazardous: Contain a variety of hazardous substances, often mercury. Safety Data Sheet (MSDS). Disposal- Place in a properly labeled container and dispose of Disposul Medical facilities are allowed to neutralize sterilants with through a licensed hazardous waste hauler /recycler OR the city's glutaraldehyde or ortho - phthaldehyde (OPA) onsite by adding VSQG' Program. Recycling is the preferred method of disposal. glycine. Completely neutralized sterilant can be disposed of down the drain. Contact SFPUC at (415) 695 -7310 for further guidance. :' ;: Reduce the use of products that qualify as universal wastes and use alternative products, when available (e.g., digital If not neutralized, place in a properly labeled container and thermometers and rechargeable batteries). dispose of through a licensed hazardous waste hauler OR the city's VSQG' Program. Options for Hazardous Waste Disposal Les< Tc:xic Tilt= Switch to a steam autoclave or dry heat oven. (Do not use ethylene -oxide gas.) Use the minimum amount of sterilant necessary. Neutralize sterilant, if appropriate, with Option 1: Have a licensed recycling contractor, mail -in glycine. Use a sterilant containing less- hazardous active service, or hazardous waste hauler remove hazardous ingredients not subject to treatment regulations, such as wastes. Recycling is always preferred, if it is possible. quaternary ammonium compounds. There are many waste haulers —both local and national — that accept hazardous wastes. Cleaning Solvents and Disinfectants AERC Recycling Solutions (510) 290 -1462 • www.aercrecycling.com AW, EM, MSK - Pick -up and Mail -in Why Hazardous Contain a variety of hazardous substances. Check with vendor or Material Safety Data Sheet (MSDS). Ecosolutions/ Stericycle (888) 278 - 7269 • www.stericycle.com Disposi:, Place in a properly labeled container and dispose of AW, PW, SW, S, MW, PhW, MSK - Pick -up only through a licensed hazardous waste hauler OR the city's VSQG" Program. Integrated Waste Control (800) 246 -9278 Less Toxic Tips Use all of a cleaning product in a container, AW, EM, PW, SW, S, MW, PhW, MSK - Pick-up only removing the need to dispose of it as hazardous waste. Photowaste Recycling (415) 459 - 8807 Never use bleach to clean vacuum lines. Bleach encourages the AW, EM, PW, SW, S, PhW, MSK - Pick -up and Mail -in release of harmful mercury from amalgam. Instead, clean vacuum lines with non - bleach cleaner. Examples include: All -In -One, E -Vac, Safety Kleen Evacuation Cleaner, EZ -Zyme, Gobble Plus, Green and Clean, MAXI- (707) 584 - 0415 • www.safety kleen.com EVAC, ProE -Vac, Purevac, Sani -Treet Plus, Stay - Clean, Super -Dent, AW, EM, PW, SW, S, PhW, MSK - Pick -up only (no sharps) Turbo Vac Line Flush, VacuCleanse, or VAC -U -EZ. Option 2: Use San Francisco's Very Small Quantity Generator Medical Wastes (VSQG) Program. Most dental offices in San Francisco qualify for this program, allowing them to schedule convenient pick -ups and drop -offs of hazardous wastes. Includes biohazardous waste (e.g. blood- soaked waste and human surgery Disposal fees are generally less because they are specimens), sharps (e.g. needles and broken glass items), and subsidized by garbage bills. pharmaceutical waste. VSQG Program Why Hazardour.: May be infectious or cause bodily harm. Unused Pick -up: (415) 355 -3777, Drop -off: (415) 330 -1425 pharmaceuticals are presumed hazardous, unless there is www.sfenvironment.com evidence to the contrary. AW, EM, PW, SW - Pick -up and Drop -off Disposr,i Disposal requirements vary with type and quantity of KEY medical waste. In general, all medical waste must be disposed of through a certified medical waste hauler. AW: Amalgam Waste S: Sharps EM: Elemental Mercury MW: Medical Wastes Less Toxic Tips Use all of a pharmaceutical, when feasible, PW: Photo - processing waste PhW: Pharmaceutical Waste removing the need to dispose of it as hazardous waste. SW: Sterilant Waste MSK: Mercury Spill Clean - up Kit Note: The companies listed above are for your convenience. Inclusion does not imply an endorsement from the City and County of Son Francisco. Fora more VSQG = Very Small Quantity Generator. See Option 2 in the box to the right extensive list of waste haulers, both local and nation -wide, call (415) 355 -3700. for more information. For more information please visit SFEnvironment.com or call (415) 355 -3700. SFEnvironment Our home. Our city. Our planet. SF Environment is a department of the City and County of San Francisco. Water Quality Management Plan (WQMP) Lyndie Lane • Appendix E Soils Report • • LIMITED GEOTECHNICAL EVALUATION 42210 LYNDIE LANE APN 921- 310 -018 TEMECULA, CALIFORNIA Prepared for • DR. BRUCE BAKER C/O ENGINEERING CONSULTING GROUP 12790 EL CAMINO REAL, SUITE 1300 SAN DIEGO, CALIFORNIA 92130 Project No. 603034 -001 October 15, 2010 • 44, Leighton Consulting, Inc A LEIGHTON GROUP COMPANY 4.1 • Leighton Consulting, Inc. A LPIGHTON GROUP COMPANY October 15, 2010 Project No. 603034 -001 Dr. Bruce Baker c/o Engineering Consulting Group 12790 El Camino Real, Suite 1300 San Diego, California 92130 Attention: Mr. David Achcroft, PE Subject: Limited Geotechnical Evaluation, 42210 Lyndie Lane, APN 921 - 310 -018, Temecula, California In accordance with your request and authorization, Leighton Consulting Inc. (Leighton) is pleased to provide herewith the results of a limited geotechnical evaluation for the proposed pavement improvements associated with the existing commercial parcel located at 42210 Lyndie Lane, Temecula, California (see Figure 1). Based on the results of this evaluation, it is our opinion that the proposed improvements are feasible from geotechnical viewpoint provided the • recommendations included in this report are implemented during design and construction. INTRODUCTION AND SCOPE OF WORK Based on the site plan provided, it is our understanding that the proposed improvements will include the addition of a driveway on the easterly side of the existing building and a parking lot at the rear of the site. The proposed improvements will also include pervious pavement in the front six and rear nine parking stalls (see site plan, Figure 2). Based on the above and our approved proposal dated September 3, 2010, our scope of work for this limited geotechnical evaluation included the following: • Geotechnical Borings: excavation of 3 geotechnical borings utilizing a hand auger to depths of approximately 2 to 5 feet below existing ground surface. • Percolation Testing: performing two percolation tests in the designated areas for pervious pavement. Testing procedures were in general accordance with Riverside County, Department of Environmental Health guidelines. • 41715 Enterprise Circle N. Suite 103 Temecula CA 92590 - 5626 (951) 296 -0530 .I Fax (951) 296 -0534. www.leightongroup.com 42210 Lyndie Lane 603034 -001 Limited Geotechnicai Evaluation October 15, 2010 • • Data Analysis and Report Preparation: Engineering analysis of the collected field and laboratory data and compilation of this report that presents the results of our testing and provides design and construction recommendations the proposed improvements. FIELD EXPLORATION On October 8, 2010, we performed 3 exploratory borings to depth ranging from 2 to 5 feet below existing ground surface utilizing a hand auger. Sampling, observation and logging of these borings were performed by a staff geologist from our office. Bulk and relatively undisturbed samples were obtained from the borings for laboratory testing and evaluation. The relatively undisturbed in -place samples were obtained utilizing a modified California drive sampler, 2-3/8 - inch I.D. (inside diameter). Soil materials were visually classified according to the Unified Soil Classification System and were further classified in the laboratory. The approximate locations of the exploratory borings are shown on Figure 2. The results of our field observation are summarized on the logs of borings included in Appendix A. LABORATORY TESTING Laboratory tests were performed on the collected bulk and ring samples to provide a basis for our 5 pavement recommendations. The tests included in -situ moisture content and dry density, and R- value testing. The results of our laboratory testing along with summaries of the testing procedures are presented included in Appendix A. SUBSURFACE SOILS CONDITIONS Based on the results of this study and review of published geologic maps and our in -house data, the site is underlain by Pauba formation. Within the depth explored of approximately 2 to 5 feet, the site is covered with a relatively thin layer of previously placed fill. The fill materials appear to be related to past grading activities associated with the existing site improvements and locally generated. This fill consist primarily of moist silty fine to coarse sand soil (SM). Based on the results of our field and laboratory testing, the fill appear to be relatively dense with an insitu dry density ranging 110 to 113 pound -per- cubic -foot (pcf) and R -value of 33. Where observed, the existing pavement consists of 4 -inch asphaltic concrete (AC) underlain by approximately 6 inches of aggregate base. -2- Leighton 42210 Lyndie Lane 603034 -001 Limited Geotechnical Evaluation October 15, 2010 411 GROUNDWATER CONDITIONS Groundwater was not reported in any of the borings. Furthermore, our review of available regional ground water well data from the California Department of Water Resources web page (http: / /wdl.water.ca.gov) indicates the regional water table is in excess of 40 feet. Thus, groundwater is not expected to impact the proposed improvements. SUMMARY OF CONCLUSIONS AND RECOMMENDATIONS Results of Field Percolation Testing As indicated above, two percolation tests were performed within the proposed pervious pavement at approximately 12 inches below existing ground surface. The percolation tests were performed in general accordance with the procedures by Department of Environmental Health of the County of Riverside (DEH, 2009). Results reported below are the most conservative reading in minutes per inch. These rates are converted to inch /hour using the Prochet Method. Table 1 - Summary of Percolation Test Results Test Hole Depth Percolation Rate Infiltration Rate Test Hole # (ft) (MPI) (In /hr) Soil Description 13-1 2.0 2.4 Silty sand (SM) • Front Stalls P -2 2.0 0.5 Silty sand (SM) Rear Stalls AC Pavement Design and Construction For planning and estimating purposes, we have made some assumptions based on the anticipated vehicle traffic usage. The appropriate pavement section will depend on the type of subgrade soil at completion of site grading, actual traffic load and planned pavement life. The results of laboratory testing indicate an R -value of 33 based on a representative soil sample collected from the subgrade soils. The pavement sections are calculated based on Traffic Indexes (TI) as indicated in Table below: ♦ • -3- Leighton 42210 Lyndie Lane 603034 - 001 Limited Geotechnical Evaluation October 15, 2010 • Table 2 - Asphalt Pavement Section Thickness General Traffic Design Asphalt Aggregate Condition Traffic Concrete Base* Index (TI) (inches) (inches) Automobile 4.0 3.0 4.0 Parking Lanes 4.5 3.0 4.0 Drive lanes & 5.5 3.0 6.5 Truck Access 6.0 3.5 6.5 Appropriate Traffic Index (TI) data should be selected by the project civil engineer and appropriate R -value of the subgrade soils will need to be determined after completion of grading to finalize the pavement design. Final pavement sections should be designed and constructed in general accordance with local, county and industry standards. The Caltrans pavement section design calculations were based on a pavement life of approximately 20 years with a normal amount of flexible pavement maintenance. PCC Pavement Design We recommend that a minimum of 6 inches of Portland Cement Concrete (PCC) placed over 4 • inches of Class 2 Aggregate Base (AB) be used for the ramp and/or heavy /truck traffic areas pavement. The PCC pavement should be adequately reinforced to prevent shrinkage cracking and have a minimum of 28 -day flexural strength of 550 psi. Other requirements of Caltrans Standard Specifications regarding mixing and placing of concrete should be followed. Pavement Construction Whether in cut or requiring additional fill, the upper 12 inches of subgrade should be scarified, moisture conditioned and compacted. Depending on actual soils conditions observed during construction, removal and compaction of loose /soft soils may be needed to reduce potential for differential settlement. All compacted fill /subgrade should be moisture - conditioned to near optimum moisture content, and compacted to at least 90 percent relative compaction (ASTM D1557) and kept in this condition until the foundation or pavement section is constructed. Minimum relative compaction requirements for all aggregate base and upper 6 inches of subgrade should be 95 percent of the maximum laboratory density as determined by ASTM D1557. Aggregate base should conform to the "Standard Specifications for Public Works Construction" (green book) current edition or Caltrans Class 2 aggregate base. • dal -4- Leighton 42210 Lyndie Lane 603034 -001 Limited Geotechnical Evaluation October 15, 2010 • Suitability of Site Soils for Fills Topsoil and vegetation layers, root zones, and similar surface materials should be striped and stockpiled for either reuse in landscape surface areas or removed from the site. Site existing fill and bedrock materials should be considered suitable for re -use as compacted fills provided the recommendations contained herein are followed. If cobbles and boulders larger than 6- inches in largest diameter are encountered or produced during grading, these oversized cobbles and boulders should be removed. Import Soils Import soils and /or borrow sites, if needed, should be evaluated by us prior to import. Import soils should be uncontaminated, granular in nature, free of organic material (loss on ignition less - than 2 percent), have low expansion potential (with an Expansion Index less than 51) and have a low corrosion impact to the proposed improvements. Utilities Trenches If applicable, utility trenches should be backfilled with compacted fill in accordance with Sections 306 -1.2 and 306 -1.3 of the Standard Specifications for Public Works Construction, ( "Greenbook "), 2009 Edition. Fill material above the pipe zone should be placed in lifts not IP exceeding 8 inches in uncompacted thickness and should be compacted to at least 90 percent relative compaction (ASTM D 1557) by mechanical means only. Site soils may generally be suitable as trench backfill provided these soils are screened of rocks over 1' /2 inches in diameter and organic matter. If imported sand is used as backfill, the upper 3 feet in building and pavement areas should be compacted to 95 percent. The upper 6 inches of backfill in all pavement areas should be compacted to at least 95 percent relative compaction. Where granular backfill is used in utility trenches adjacent moisture sensitive subgrades and foundation soils, we recommend that a cut -off "plug" of impermeable material be placed in these trenches at the perimeter of buildings, and at pavement edges adjacent to irrigated landscaped areas. A "plug" can consist of a 5 -foot long section of clayey soils with more than 35- percent passing the No. 200 sieve, or a Controlled Low Strength Material (CLSM) consisting of one sack of Portland- cement plus one sack of bentonite per cubic -yard of sand. CLSM should generally conform to Section 201 -6 of the Standard Specifications for Public Works Construction, ( "Greenbook "), 2009 Edition. This is intended to reduce the likelihood of water permeating trenches from landscaped areas, then seeping along permeable trench backfill into the building and pavement subgrades, resulting in wetting of moisture sensitive subgrade earth materials under buildings and pavements. da l -5- Leighton 42210 Lyndie Lane 603034 - 001 Limited Geotechnical Evaluation October 15, 2010 • Excavation of utility trenches should be performed in accordance with the project plans, specifications and the California Construction Safety Orders (2006 Edition or more current). The contractor should be responsible for providing a "competent person" as defined in Article 6 of the California Construction Safety Orders. Contractors should be advised that sandy soils (such as fills generated from the onsite alluvium) could make excavations particularly unsafe if all safety precautions are not properly implemented. In addition, excavations at or near the toe of slopes and /or parallel to slopes may be highly unstable due to the increased driving force and load on the trench wall. Spoil piles from the excavation(s) and construction equipment should be kept away from the sides of the trenches. Leighton Consulting, Inc. does not consult in the area of safety engineering. GEOTECHNICAL REVIEW We recommend that Leighton be provided the opportunity to review all geotechnical aspects of the project including the following: > Leighton should review final site plans to determine whether the recommendations • provided in this report have been properly implemented. > Observation and testing should be performed by Leighton during construction. It should be anticipated that the substrata exposed during grading may vary from that encountered in the previously excavated borings. Reasonably continuous geotechnical observation and testing during site grading allows for evaluation of the actual soil conditions and the ability to provide appropriate revisions during construction, if required. LIMITATIONS This report was prepared solely for Dr. Bruce Baker and /or their representative, for the scope of work described in this report, in accordance with generally accepted geotechnical engineering practices at this time in California. No warranty is expressed or implied. This report was necessarily based in part upon data obtained from a limited number of observances, pavement coring, soil borings and/or samples. Such information is necessarily incomplete. Therefore, the findings, conclusions and recommendations presented in this report can be relied upon only if Leighton has the opportunity to observe the subsurface conditions during grading and construction of the pavements, in order to confirm that our preliminary findings are representative for the site. • dal -6- Leighton 42210 Lyndie Lane 603034 -001 Limited Geotechnical Evaluation October 15, 2010 This report is not authorized for use by, and is not to be relied upon by any party except, Dr. Bruce and /or their representative, with whom Leighton Consulting, Inc. has contracted for the work. Use of or reliance on this report by any other party is at that party's risk. Unauthorized use of or reliance on this report constitutes an agreement to defend and indemnify Leighton Consulting Inc., from and against any liability which may arise as a result of such use or reliance, regardless of any fault, negligence, or strict liability of Leighton. We appreciate the opportunity to work with you on this project. If you have any questions or require further information, please call us at your convenience. Respectfully submitted, LEIGHTON CONSULTING, INC. QROFF.ssio ago \'` � �4 S'4 v � y 4 FHT F. q Off�' „id , O i Q No. 1921 4 .� c� N0. 2841 CERTIF!EO * 6EOT * * ENGINEERING GEOLOGIST ` Simon I. Saiid, R obert F. Riha, GE 2641(Exp. 09/30/11) CEG 1921 (Exp. 02/28/12) `aP �Q • OF Principal Engineer GA Senior Principal Geologist OF co o • Attachments: References Figure 1 — Site Location Figure 2 — Boring/Test Location Plan Appendix A — Borings Logs and Laboratory Test Results Appendix B — Important Information Regarding Your Geotechnical Engineering Report Distribution: (3) Addressee (one PDF via email) • -7- Leighton 42210 Lyndie Lane 603034 -001 Limited Geotechnical Evaluation October 15, 2010 • References American Society of Civil Engineers, ASCE, 2006, Minimum Design Loads for Buildings and Other Structures, ASCE Standard 7 -05, Includes Supplement No. 1 and Errata. California Building Code, 2007, California Code of Regulations, Title 24, Part 2, Volume 2 of 2, effective date January 1, 2008. California Geologic Survey, (CGS), 2006, Geologic Map of the San Bernardino and Santa Ana 30' X 60' Quadrangle, Southern California, Version 1.0, Compiled by Douglas M. Morton and Fred K. Miller, Open File Report 06 -1217. California Geologic Survey (CGS), 2003a, Preliminary Geologic Map of the Murrieta 7.5' Quadrangle, Riverside County, Michael P. Kennedy and Douglas M. Morton, Open File Report of 03 -189. California, State of, Department of Conservation, Division of Mines and Geology, 1999, Preliminary Digital Geologic Map of the Santa Ana 30' X 60' Quadrangle, Southern California, Version 1.0, Compiled by D.M. Morton, Open File Report 99 -172. California, State of, Department of Transportation, 2004, Highway Design Manual. California, State of, Department of Transportation, 2006, Highway Design Manual. Portland Cement Association, 1974, Design of Concrete pavement for City Streets. Leighton r :grin r.. r i G �� q`, Via. F 1 ly , . R a r: h 0 d�. - - 3 y iotif • . . .. Ca ' / n r 4 %x1 o ra \ \\�� `� q` � .S Av o CitI';% del Soi r°� ., \ N. ,t', of \ , '''-:::,,-2..,,,,, .. n ?, M ar garita R d t ko "• ", • APPROXIMATE ir SITE LOCATION to r0� ,, c..wcrnla Rd 0 0 CD (7 y I .. t t . .1 4' „ o MIMES CZ �. ' tom #C�l' 3 • T i A9 4 a t \.,\I l � yA, C r N ° F n F 46 ei �� 4_,... r�4- , 0 500 1,000 1,500 ° �fs� 'Si', -� Feet @� Project 603034 -001 EnglGeol. S1S/RFR Figure 1 SITE LOCATION MAP Scale: 1 "= 1,000' Date: October 2010 Lyndie Lane Geotechnical Exploration 4 0 III Base Map: USGS Topographic Map, Quadrangle, 42210 Lyndie Lane California 7.5' Series, County, 1979 Thematic Info: Leighton Temecula, California Author: BQT Leighton Map Saved as 1Sgeomaticstdata2 \Draging16 00 2 1110 0 91of _2010- 10- 13 \GIS1Figuret.mxd at (10113/2010 @ 10:55 hrs) PE H,198 \ rasE PAVEMENT 18,928 — .: 31 .* / E PAVEMENT 3,270 / ,0 —2 - New / / * .Aft--- + 4. AREA 6,206 , / . 4 . , A / + +/ / Cl ` / TOTAL = 34,800 , , ` / / / it ti ir , , C, , i ,/,/ ,,, ,,l ' ,,, / ZONE • H (HIGH DEN&TY RESIOENr1AL) / ;q 2r, USE • R.1 (RESIDENTIAL) , LX. RIBBON x / L. GUTTER ° / APN: 921- ' -' 18 , / c ,, / NEW obvewAV 1.: jai '" •/ E.X. en NIGH I ,2 stb CHAIN LINK FENCE Wl GATE �, ti - i , / / +/7 �t / ') ' ZONE • CC (COMMUNITY COMMERCIAL // . `�I ! + Q USE • M (MERCANTILE) v ` s 0 'a y ,� CL , , _ f/ if , 1► Legend ID /. / r 1 � / /ri1,y) f + EX. NN -■ / / / / /I,l / CtWNUN' ! 2 . , / / , ��"" Approximate Location • / + / /F<�� of Exploratory Boring/ / / � ' "�'^� Percolation Test / lLCVARKmG R 7/W B - /P - + r U avi ; F ` // f / / ,.., f :t' ∎ / j /: E]l. TAABN 1 ENCLOSURE 7J , ..- / / / � >FTXlBFt -_ . / e / / ) / / 1 I / _. / / r EX. AC PARtt)NG B -1 /P -1 / / / / S . , '� / ..- mhf GRAPHIC SCALE • 42 6f+ �7 r' / / ( Its Ker ) ,, om` - -7 Scale 1" = 40' • - --1, oh:. t,,. 7/ UPI.. • /sue - , -. 4.4 42 Basemap: Engineering Consulting Group, Site Plan, Lyndie Lane, August 28, 2010. Project No. / • Geotechnical Exploration 42210 Lyndie Lane BORING /PERCOLATION 603034 - 001 0 Temecula, California TEST LOCATION PLAN Date Figure 2 October 2010 42210 Lyndie Lane 603034 -001 Limited Geotechnical Evaluation October 15, 2010 • APPENDIX A Boring Logs and Results of Laboratory Testing III • LOG OF EXPLORATORY BORING • PROJECT NO.: 603034 - 001 LOGGED BY: JTD PROJECT NAME: Lyndie Lane Geotechnical Exploration EQUIPMENT: Hand Auger /Ring Sampler LOCATION: Temecula, CA DATE: 10/8/2010 ELEVATION: see Figure 2 SAMPLES a a a BOR ING NO.: B -1 m y ° ro — co y E E ( O rZ y t) ° E i n Z A ° MATERIAL DESCRIPTION AND COMMENTS _ Pa Surface: 4" AC over 6" Aggregate Base SM Q 10 " -2.0'; Dark Yellow- Brown, moist, dense, Silty fine to coarse grained SAND, R -1 few fine Gravel 110 5 Total Depth = 2.0 ft bgs, backfilled with cuttings and cold patch asphalt 5- 10 - 15 - 0 Z Sample Type: 1111- -Small Bulk —Large Bulk N - -Ring W t7 Laboratory Testing: AL = Milberg Limits El = Expansion Index RV = R -Value Test J SA = Sieve Analysis SR = Sulfate /Resisitivity Test SH = Shear Testing MD = Maximum Density • LOG OF EXPLORATORY BORING • PROJECT NO.: 603034 - 001 LOGGED BY: JTD PROJECT NAME: Lyndie Lane Geotechnical Exploration EQUIPMENT: Hand Auger /Ring Sampler LOCATION: Temecula, CA DATE: 10/8/2010 ELEVATION: see Figure 2 SAMPLES a r a r) BORING NO.: B -2 a U - - th ° E E Z o 0~ w MATERIAL DESCRIPTION AND COMMENTS J - SW @ 0 -6" Dark Brown, moist to wet, fine to coarse grained SAND, few Clay R -1 SM @ 6 " -3.0'; Gray - Brown, moist, medium dense, Silty fine to coarse grained SAND 112 13 B - with Clay, R -Value a 33 RV ML @ 3.0' - 4.0'; Olive Brown, moist, sandy SILT Total Depth = 4.5' bgs, backfilled with cuttings 5- - • 10 - 15 - O Z Sample Type: ® - -Small Bulk - -Large Bulk N ---Chunk W _ 0 Laboratory Testing: AL = Attiberg Limits El = Expansion Index RV = R -Value Test LLJ J SA = Sieve Analysis SR = Sulfate /Resisitivity Test SH = Shear Testing MD = Maximum Density • LOG OF EXPLORATORY BORING PROJECT NO.: 603034-001 LOGGED BY: JTD PROJECT NAME: Lyndie Lane Geotechnicat Exploration EQUIPMENT: Hand Auger /Ring Sampler LOCATION: Temecula, CA DATE: 10/8/2010 ELEVATION: see Figure 2 SAMPLES o w 'a Z, BORING NO.: B -3 m m E E ❑ 0. a 0 (e E n z �' p A Ja c� = MATERIAL DESCRIPTION AND COMMENTS ❑ 2 _ SM @ 0 - 8" Artificial Fill (Af); Gray- Brown, moist, Silty fine to medium grained SAND, trace fine Gravel R -1 @ 8 " -2.0'; Yellow- Brown, moist, dense, Silty fine to coarse grained SAND, few fine 113 5 B -1 Gravel, R -Value = 33 RV Total Depth = 2.0' bgs, backfilled with cuttings 5- • 10 - 15 - Z Sample Type: —Small Bulk —Large Bulk " -- -Chunk W 0 Laboratory Testing: AL = Attiberg Limits El = Expansion Index RV = R -Value Test w l SA = Sieve Analysis SR = Sulfate /Resisitivity Test SI I = Shear Testing MD = Maximum Density • Boring No. B - B - B - Sample No. R - R - R - Depth (ft.) 1 -1.5 1 -1.5 1 -1.5 Sample Type RING RING RING TOP: TOP: TOP: SM SM SM 1 Visual Soil Classification BOTTOM: BOTTOM: BOTTOM: 1 SM SM ISM Pocket Penetrometer Weight Soil + Rings / Tube (gm.) 1280.2 1182.8 1126.8 - Weight of Rings / Tube (gm.) 311.5 267.0 267.0 Average Length (in.) 7.0 6.0 6.0 Average Diameter (in.) 2.416 2.416 2.416 Wet. Wt. of Soil + Cont. (gm.) 313.4 411.0 347.8 Dry Wt. of Soil + Cont. (gm.) 301.4 369.0 333.3 Weight of Container (gm) 50.5 50.4 50.4 Container No.: R 3 G Wet Density (pcf) 115 127 119 Moisture Content ( %) 5 13 5 Dry Density (pcf) 110 112 113 Degree of Saturation ( %) 24 _ 71 28 MOISTURE & DENSITY of SOILS Project Name: LYNDIE LANE ASTM D 2937 Project No.: 603034 -001 row- Client Name: ** , Leighton Tested By: JAP Date: 10/11/10 Rev. 08-04 Moisture and Denny; 6-1 THRU 8 -9, R -1 • 110 0 Leighton R -VALUE TEST RESULTS Project Name: LYNDIE LANE Date: 10/12/10 Project Number: 603034 -001 Technician: JRH Boring Number: B -2 + B -3 Depth (ft.): 0 -1.0 Sample Number: B -1 Sample Location: - Sample Description: SILTY SAND (SM), brown. TEST SPECIMEN A B C MOISTURE AT COMPACTION % 9.9 10.9 12.0 HEIGHT OF SAMPLE, Inches 2.40 2.40 2.68 DRY DENSITY, pcf 124.3 122.9 116.8 COMPACTOR AIR PRESSURE, psi 200 150 100 EXUDATION PRESSURE, psi 422 291 111 EXPANSION, Inches x 10exp -4 13 5 0 STABILITY Ph 2,000 lbs (160 psi) 35 87 116 TURNS DISPLACEMENT 3,92 4.08 4.39 R -VALUE UNCORRECTED 69 34 18 R -VALUE CORRECTED 67 32 20 DESIGN CALCULATION DATA a b c GRAVEL EQUIVALENT FACTOR 1.0 1.0 1.0 III TRAFFIC INDEX 5.0 5.0 5.0 STABILOMETER THICKNESS, ft. 0.53 1.09 1.28 EXPANSION PRESSURE THICKNESS, ft. 0.49 0.19 0.00 4.00 ■ ■ ■'. 90 MMMEM MMM■ ■MMM ■ ■ ■MM ■M ■ ■MM ■M ■ ■ ■MMMMM ■ ■MM■ ■■■■ Q■■■■ ■■ ■■■■ ■■ ■.■■■■■■■■ ■ ■�■■■.■■.:■■ ■■■■■■■■■ ■■■■■■■■■■■■■■■MM■■■■■■■■■■■■■■ - .■■O MM■■M■M ■■■■■■■ ■M■■■ ■M ■M ■MMM ■M ■MM■■■ ■M ■■■ Z .•••• ■■■■■■■■■ ■ ■■■ ■■■M■■M■■ ■ ■■■■ ■■■■■■■■■■■■■ 00 3.50 ■moss■■■ ill i ii iiii Bo MMMMMMMMMMMMMMM M■MMMMMMMMMMM■■■M■M■M■■MM in ��ii■■■ ■I •. ■■■■■■■■■ ■ ■ ■ ■ ■ ■ ■ ■■■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■■■ ■ ■■ ■ ■ ■ ■ ■■ ■■■■■■■■■ ■■■■■■■■■■■■■■■■■ ■■■■■MMMMM■■■M Z 3.00 '"iii ■■■■■■■■■ ■ ■ ■ ■■■■■■■ ■ ■ ■■ ■■■■ ■ ■■ ■ ■ ■ ■■■■■ ■■ a i 70 x ■ ■ ■ ■■■■■ ■■■■■■■■ ■■■=i ■'J ■■ ■■I' ■■■■■■■■ ■■■■■■■■■■a■■ ■■■M■■■■■■■■■■■■■■ Ill 2.50 ■■■■■■■■■■ ■ ■ ■ ■■ ■ ■ ■■�� ■ ■ ■ ■ ■ ■ ■ ■ ■■ ■■ ■ ■■■■ ■ ■■ ■MEMO■■ ■■M■■ ■ ■M■ ■M \ ■M ■MMM■■■■■■ ■M■■■ ■M CO I . I i.. ■ ' : � 1111111 60 MMMMM■MMMMMMMMMMMMMM \Ma.M MMMMMMMMMMMMMEM (n w 2.00 ■■■ ■ ■■■■ ■ ■■ ■ ■■ ■ ■ ■ ■ ■■i1■ ■MM MIME ■■■ ■M M■■■■ cu ip U ■■■■■■■■■■■■■■■■■■■ ■M■■ ■M M■ ■■■■■■■■■■■ ■■ w w •.iuuu■■ ■■■■■■■■A III j ■■■■■■■■■ M a■■■■■■■■■■.■■■M■■■■■■■■■■■■■■■ z 1 .50 11MMM MMMMMMM ■ ■MMM■■A ■■■■ M■■■M ■MM ■M ■ ■ ■ ■ ■ ■M ■MM■M■■■■■■■■■■■■■■ X ■■ ■■■■■■ Giii � '■ > ■■■■■■■■■ ■■ ■■■■■■■■■,1■MM■■■■■■■■■■■■■■ U ■■■■■■■■■ MO MMEM■■■■■■■UMM■■■■■■■■■■■■■ N 1.00 ,••• ' ■ ■ni 4 MUUMME ••••• MMMMMMMMEMMEM• ■■■■ a rim■■■■■■■■■■■■■' ■■■ ■■■ ■ ■■■■■ ■■ ■ ■■■ C M ■■■■■■■■ ■M■■■ w ' ■ ■■ ■ ■■■■■ ■ ■■■■ ■ ■ ■■ ■ ■ ■■■►'M ■■■■■■■■■ ■■ ■ ■■ > 0 " ■. j . m 30 ••UIMMEMMO�■■ ■ ■M■■■■■■MOM ■M■ ■M■■ ■M■■ ■M ■�I ■ ■ ■ ■ ■MMMMM MMM• ■M ■M■■ ■MM ■ ■■ \M■ MM■ ■ ■MMMMM o.00• • ■■■■■■■■■. .■■ ■' ■ ■ ■■■ ■ ■■MIMM■■■■rzo ■ ■ ■ ■ ■■■ 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 20 MMMMMMMMMMMMMM MMMMMMMMMMMMM;fMMMazpilm••• MMMMMMMMMMMMM NUMNIMMEM MMMMMM IIIMMIIMMUMUMMU COVER THICKNESS BY STABILOMETER in 1111111111111111■■■ ■ ■ ■ ■� ■ ■ ■■ ■. ■ ■■ feet ■■■■'■■ ■■ M■■MM■ • ■ ■■■■ ■ ■■■ MMM■ mom 10 MMM.■ MMM■ ■■■■ ■M■MMMM ■MMM M NM ■ ■MMMMMMM ■MM■ ■■ ■■ ■ ■■ ■■■ ■ ■ ■ ■■ ■■■ ■ ■ ■■ ■■ M■ ■■ ■ ■■ ■ ■ ■■ ■■■■ iii ii iii. 0 ■■■■■ o MM ■■■■■■■■M■■ ■ ■ ■M ■M 800 700 600 500 400 300 200 100 0 • R -VALUE BY EXPANSION: 68 EXUDATION PRESSURE (psi) R -VALUE BY EXUDATION: 33 EQUILIBRIUM R- VALUE: 33 Rev. 08 -04 42210 Lyndie Lane 603034 -001 Limited Geotechnical Evaluation October 15, 2010 APPENDIX B Important Information Regarding Your Geotechnical Engineering Report • • Important Information About Your G eotechnical Subsurface problems are a principal cause of construction delays, cost overruns, claims, and disputes. The following information is provided to help you manage your risks. Geotechnical Services Are Performed for • elevation, configuration, location, orientation, or weight of the Specific Purposes, Persons, and Projects proposed structure, Geotechnical engineers structure their services to meet the specific needs of • composition of the design team, or their clients. A geotechnical engineering study conducted for a civil engi- • project ownership. neer may not fulfill the needs of a construction contractor or even another civil engineer. Because each geotechnical engineering study is unique, each As a general rule, always inform your geotechnical engineer of project geotechnical engineering report is unique, prepared solely for the client. No changes —even minor ones —and request an assessment of their impact. one except you should rely on your geotechnical engineering report without Geotechnical engineers cannot accept responsibility or liability for problems first conferring with the geotechnical engineer who prepared it. And no one that occur because their reports do not consider developments of which - -- not even you --should apply the report for any purpose or project they were not informed • except the one originally contemplated. Subsurface Conditions Can Change Read the Full Report A geotechnical engineering report is based on conditions that existed at Serious problems have occurred because those relying on a geotechnical the time the study was performed. Do not rely on a geotechnical engineer- engineering report did not read it all. Do not rely on an executive summary. ing report whose adequacy may have been affected by: the passage of Do not read selected elements only. time; by man -made events, such as construction on or adjacent to the site; or by natural events, such as floods, earthquakes, or groundwater fluctua- A Geotechnical Engineering Report Is Based on tions. Always contact the geotechnical engineer before applying the report A Unique - Set of Project - Specific Factors to determine if it is still reliable. A minor amount of additional testing or Geotechnical engineers consider a number of unique, project - specific fac- analysis could prevent major problems. tors when establishing the scope of a study. Typical factors include: the client's goals, objectives, and risk management preferences; the general Most Geotechnical Findings Are Professional nature of the structure involved, its size, and configuration; the location of Opinions the structure on the site; and other planned or existing site improvements, Site exploration identifies subsurface conditions only at those points where such as access roads, parking lots, and underground utilities. Unless the subsurface tests are conducted or samples are taken. Geotechnical engi- geotechnical engineer who conducted the study specifically indicates oth- neers review field and laboratory data and then apply their professional erwise, do not rely on a geotechnical engineering report that was: judgment to render an opinion about subsurface conditions throughout the • not prepared for you, site. Actual subsurface conditions may differ— sometimes significantly— • not prepared for your project, from those indicated in your report. Retaining the geotechnical engineer • not prepared for the specific site explored, or who developed your report to provide construction observation is the • completed before important project changes were made. most effective method of managing the risks associated with unanticipated conditions. Typical changes that can erode the reliability of an existing geotechnical engineering report include those that affect: A Report's Recommendations Are Not Final • the function of the proposed structure, as when it's changed from a Do not overrely on the construction recommendations included in your parking garage to an office building, or from a light industrial plant report. Those recommendations are not final, because geotechnical erlgi- • to a refrigerated warehouse, neers develop them principally from judgment and opinion. Geotechnical engineers can finalize their recommendations only by observing actual subsurface conditions revealed during construction. The geotechnical have led to disappointments, claims, and disputes. To help reduce the risk engineer who developed your report cannot assume responsibility or of such outcomes, geotechnical engineers commonly include a variety of liability for the report's recommendations if that engineer does not perform explanatory provisions in their reports. Sometimes labeled 'limitations" construction observation. many of these provisions indicate where geotechnical engineers' responsi- bilities begin and end, to help others recognize their own responsibilities A Geotechnical Engineering Report is Subject to and risks, Read these provisions closely. Ask questions. Your geotechnical Misinterpretation engineer should respond fully and frankly. Other design team members' misinterpretation of geotechnical engineering reports has resulted in costly problems. Lower that risk by having your geo- Geoenvironmeai Concerns Are Not Covered technical engineer confer with appropriate members of the design team after The equipment, techniques, and personnel used to perform a geoenviron- submitting the report. Also retain your geotechnical engineer to review peril- mental study differ significantly from those used to perform a geotechnical nent elements of the design team's plans and specifications. Contractors can study. For that reason, a geotechnical engineering report does not usually also misinterpret a geotechnical engineering report. Reduce that risk by relate any geoenvironmental findings, conclusions, or recommendations; having your geotechnical engineer participate in prebid and preconstruction e.g., about the likelihood of encountering underground storage tanks or conferences, and by providing construction observation. regulated contaminants. Unanticipated environmental problems have led to numerous project failures. If you have not yet obtained your own geoen- Do Not Redraw the Engineer's Logs vironmental information, ask your geotechnical consultant for risk man - Geotechnical engineers prepare final boring and testing logs based upon agement guidance. Do not rely on an environmental report prepared for their interpretation of field logs and laboratory data. To prevent errors or someone else. omissions, the logs included in a geotechnical engineering report should never be redrawn for inclusion in architectural or other design drawings. Obtain Professional Assistance To Deal with Meld Only photographic or electronic reproduction is acceptable, but recognize Diverse strategies can be applied during building design, construction, that separating logs from the report can elevate risk operation, and maintenance to prevent significant amounts of mold from growing on indoor surfaces. To be effective, all such strategies should be Give Contractors a Complete Report and devised for the express purpose of mold prevention, integrated into a corn- Guidance prehensive plan, and executed with diligent oversight by a professional Some owners and design professionals mistakenly believe they can make mold prevention consultant. Because just a small amount of water or contractors liable for unanticipated subsurface conditions by limiting what moisture can lead to the development of severe mold infestations, a num- they provide for bid preparation. To help prevent costly problems, give con - ber of mold prevention strategies focus on keeping building surfaces dry. tractors the complete geotechnical engineering report, but preface it with a While groundwater, water infiltration, and similar issues may have been clearly written letter of transmittal. In that letter, advise contractors that the addressed as part of the geotechnical engineering study whose findings report was not prepared for purposes of bid development and that the are conveyed in this report, the geotechnical engineer in charge of this report's accuracy is limited; encourage them to confer with the geotechnical project is not a mold prevention consultant; none of the services per - engineer who prepared the report (a modest fee may be required) and /or to formed in connection with the geotechnical engineer's study conduct additional study to obtain the specific types of information they were designed or conducted for the purpose of mold proven - need or prefer. A prebid conference can also be valuable. Be sure contrac- lion. Proper implementation of the recommendations conveyed tors have sufficient time to perform additional study. Only then might you in this report will not of itself be sufficient to prevent mold be in a position to give contractors the best information available to you, from growing in or on the structure involved. while requiring them to at least share some of the financial responsibilities stemming from unanticipated conditions. Rel on Your ASFE - Mender Geoteclmcial Engineer for Additional Assistance Read Responsibility Provisions Closely Membership in ASFE/THE BEST PEOPLE ON EARTH exposes geotechnical Some clients, design professionals, and contractors do not recognize that engineers to a wide array of risk management techniques that can be of geotechnical engineering is far less exact than other engineering disci- genuine benefit for everyone involved with a construction project. Confer plines. This lack of understanding has created unrealistic expectations that with you ASFE - member geotechnical engineer for more information. ASFE THE BEST PEOPLE ON EARTH 8811 Colesville Road/Suite 5106, Silver Spring, MD 20910 Telephone: 301 /565 -2733 Facsimile: 301/589 -2017 e -mail: infoeasfe.org www.aste.org Copyright 2004 by ASFE, Inc. Duplication, reproduction, or copying of this document, in whole or in part, by any means whatsoever, is strictly prohibited, except with ASFES • specific written permission. Excerpting, quoting, or otherwise extracting wording from this document is permitted only with the express written permission of ASFE, and only for purposes of scholary research or book review. Only members of ASFE may use this document as a complement to or as an element of a geotechnical engineering report. Any other firm, individual, or other entity that so uses this document without being an ASFE member could be committing negligent or intentional (fraudulent) misrepresentation. IIGER0E041.0MRP Water Quality Management Plan (WQMP) Lyndie Lane Delltd� �fflC@ Appendix F Treatment Control BMP Sizing Calculations and Design Details F.1 Design Procedure for BMP Design Volume F2 Design Procedure for Porous Pavement F.3 Typical Detail for Porous Pavement � • Riverside County Water Quality Management Plan Exhibit C • Worksheet 1 Design Procedure for BMP Design Volume 85 percentile runoff event Designer: TAM l➢ A t -t a-07'T Company: €'15011 •its 1.ts2. CP m SvL-T St.c A e.wf'- Date: (-13-2-n0 Project: L ' - c t a t % - ( - A i N F ( f k o — 1- 1 t Location: *224 0 LrtMDtk k4 st 7 7-t . v"^. c--v cab\ , CA 9 Zc, O 5v4 A,t, t • O 1, Create Unit Storage Volume Graph . a. Site location (Township, Range, and T &R • Section). Section (1) b. Slope value from the Design Volume 2.7 (2) Curve in Appendix A. Slope = c. Plot this value on the Unit Storage Volume Graph shown on Figure 2. d. Draw a straight line form this point to Is this graph Yes CI origin, to create the graph attached? • 2. Determine Runoff Coefficient a. Determine total impervious area AimPeMa = 0 - 110 . acres (5) b. Determine total tributary area A = O . ZS7 acres (6) c. Determine Impervious fraction i= (5)/(6) i= 0.-13 (7) d. Use (7) in Figure 1 to find Runoff O • 5 Z 3 ORC =.8581 - .78i +.774i +.04 C= ( 3. Determine 85% Unit Storage Volume a. Use (8) in Figure 2 Draw a Vertical line from (8) to the graph, then a Horizontal line to the in -acre desired V„ value. V„ = C 4 038 acre (9) 4. Determine Design Storage Volume a. VBMP = (9) x (6) [in- acres] VBMP = OT J ' l c � ` 3 Z in -acre (10) b. VBMP = (10) 1 12 [ft- acres] VBMP t MP = - 0 1 3 ft -acre (11) C. VBMP = (11) x 43560 [ft VBMP = 6 6 S.- ft' (12) Notes: • July 24, 2006 Engineering Consulting Group 091124 /Lvndie Lane - Subarea 1 Porous pavement calculations - Front Parking Lot • V(bmp)= 665 CF Porous Pavement Req'd Porous pvmt. = 6 parking stalls A(bmp)= 972 SF I r = 0.50 in/hr Vr = 0.4 (void ratio for No. 2 Crushed Rock)) Dsb = [ (Vbmp /Vr)- (Abmp *Ir/12 *24)] /Abmp Calculations based on 24hr storm event Calculated Depth of Subbase Drawdown Dsb (feet) Dsb (inches) Time (hrs) 0.710 8.5 41.05 • • F:\ Projects \DBB_091124 \Docs \WQMP \Subarea 1.xlsx Riverside County Water Quality Management Plan Exhibit C • Worksheet 1 Design Procedure for BMP Design Volume 85 percentile runoff event Designer: 1),AV CO NStl Company: 1.IC.It c NSvi- 'rta57a GjoVp Date: (- 13 —s-at1 Project: 1 -`(N)\ [-ANF (3816 - 211 Location: A-fl40 LKN,�tst L" inektcv t CA 0 12590 S VE'Az'€A 1. Create Unit Storage Volume Graph a. Site location (Township, Range, and T &R Section). Section ( b. Slope value from the Design Volume Curve in Appendix A. Slope = 1‘ Z (2) c. Plot this value on the Unit Storage Volume Graph shown on Figure 2. d. Draw a straight line form this point to Is this graph Yes ❑ NoJ61 the origin, to create the graph attached? • 2. Determine Runoff Coefficient a. Determine total impervious area Aimpermus = O ` Zi acres (5) b. Determine total tributary area A r p rai = O ' S 0 acres (6) c. Determine Impervious fraction i= (5) /(6) i= O' Ys-s- (7) d. Use (7) in Figure 1 to find Runoff ORC =.8581 - .78i +.774i +.04 C= o '31.6 (8) 3. Determine 85% Unit Storage Volume a. Use (8) in Figure 2 Draw a Vertical line from (8) to the graph, then a Horizontal line to the in -acre desired V„ value. V„ = C ' 439 acre (9) 4. Determine Design Storage Volume a. VBMP = (9) x (6) [in- acres] Vamp = O - in -acre (10) b. Vamp = (10/12 [ft- acres] Vamp = .O 1 Si ft -acre (11) C. Vamp = (11) x 43560 [f?] VBMP = t 6 ft (12) Notes: • July 24, 2006 Engineering Consulting Group 091124 /Lvndie Lane - Subarea 2 Porous pavement calculations - Rear Parking Lot • V(bmp)= 816 CF Porous Pavement Req'd Porous pvmt. = 9 parking stalls A(bmp)= 1458 SF Ir = 0.50 in /hr Vr = 0.4 (void ratio for No. 2 Crushed Rock)) Dsb = [ (Vbmp /Vr)- (Abmp *Ir/12 *24)] /Abmp Calculations based on 24hr storm event Calculated Depth of Subbase Drawdown Dsb (feet) Dsb (inches) Time (hrs) 0.399 4.8 33.58 • • F:\ Projects \DBB_091124 \Docs \WQMP \Subarea 2.xlsx 3/4" WASHED CURB & FRACTURED GUTTER OPEN -GRADED PER PLAN STONE PER ASTM POROUS NO. 57BASE ASPHALT OR REQUIREMENTS FINISHED CONCRETE SURFACE • G _.. a s . . �.,, I t ; ; i 7 11 I 171: ( Ir I. .. I I _II '; I � .. 1 1/Y TO 3' CLEANED FRACTURED OPEN - GRADED STONE PER ASTM NO.2 SUBBASE REQUIREMENTS 90% COMPACTED FILL OR NATURAL SOIL SUBGRADE POROUS PAVEMENT - TYPICAL DETAIL G -3 1 = 1 - o ' • Water Quality Management Plan (WQMP) Lyndie Lane • Appendix G Agreements — CC &Rs, Covenant and Agreements and /or Other Mechanisms for ensuring ongoing Operation, Maintenance, Funding and Transfer of Requirements for this project- specific WQMP • • RECORDING REQUESTED BY: • CITY OF TEMECULA AND WHEN RECORDED MAIL TO: CITY OF TEMECULA 41000 Main Street Temecula, CA. 92590 SPACE ABOVE THIS LINE FOR RECORDER'S USE OPERATIONS AND MAINTENANCE AGREEMENT • • • Water Quality Management Plan and Stormwater BMP Transfer, Access, and Maintenance Agreement OWNER NAME: Dr. Bruce Baker, DMD PROPERTY ADDRESS: 42210 Lyndie Lane, Temecula, CA 92590 APN: 921- 310 -018 THIS AGREEMENT is made and entered into in The City of Temecula, County of Riverside, State of California, this First day of June, 2011, by and between Dr. Bruce Baker, DMD, herein after referred to as "Owner ", and the CITY OF TEMECULA, a municipal corporation, located in the County of Riverside, State of California hereinafter referred to as "CITY "; WHEREAS, the Owner owns real property ( "Property) in the City of Temecula, County of • Riverside, State of California, more specifically described in Exhibit "A" and depicted in Exhibit "B ", each of which exhibits is attached hereto and incorporated herein by this reference; WHEREAS, at the time of initial approval of development project known as: Lyndie Lane Office Building within the Property described herein, the City required the project to employ Best Management Practices, hereinafter referred to as "BMPs," to minimize pollutants in urban runoff; WHEREAS, the Owner has chosen to install and /or implement BMPs as described in the Water Quality Management Plan, on file with the City, hereinafter referred to as "WQMP," to minimize pollutants in urban runoff and to minimize other adverse impacts of urban runoff; WHEREAS, said WQMP has been certified by the Owner and reviewed and accepted by the City; WHEREAS, said BMPs, with installation and /or implementation on private property and draining only private property, are part of a private facility with all maintenance or replacement, therefore, the sole responsibility of the Owner in accordance with the terms of this Agreement; • WHEREAS, the Owner is aware that periodic and continuous maintenance, including, • but not necessarily limited to, filter material replacement and sediment removal, is required to assure peak performance of all BMPs in the WQMP and that, furthermore, such maintenance activity will require compliance with all Local, State, or Federal laws and regulations, including those pertaining to confined space and waste disposal methods, in effect at the time such maintenance occurs; NOW THEREFORE, it is mutually stipulated and agreed as follows: 1. Owner hereby provides the City of Temecula designee complete access, of any duration, to the BMPs and their immediate vicinity at any time, upon reasonable notice, or in the event of emergency, as determined by the City's Engineer, no advance notice, for the purpose of inspection, sampling, testing of the Device, and in case of emergency to direct all necessary repairs or other preventative measures at owner's expense as provided in paragraph 3 below. City shall make every effort at all times to minimize or avoid interference with Owner's use of the Property. 2. Owner shall use its best efforts diligently to maintain all BMPs in a manner assuring peak performance at all times. All reasonable precautions shall be exercised by Owner and Owner's representative or contractor in the removal and extraction of any material(s) from the BMPs and the ultimate disposal of the material(s) in a manner consistent with all relevant laws and regulations in effect at the time. As may be requested from time to tome by the City, the Owner shall provide the City with documentation identifying the material(s) removed, the • quantity, and disposal destination. 3. In the event Owner, or its successors or assigns, fails to accomplish the necessary maintenance contemplated by this Agreement, within five (5) days of being given written notice by the City, the City is hereby authorized to cause any maintenance necessary to be done and charge the entire cost and expense to the Owner or Owner's successors or assigns, including administrative costs, attorneys fees and interest thereon at the maximum rate authorized by the Civil Code from the Date of the notice of expense until paid in full. 4. The City may require the owner to post security in form and for a time period satisfactory to the City to guarantee the performance of the obligations stated herein. Should the Owner fail to perform the obligations under the Agreement, the City may, in the case of a cash bond, act for the Owner using the proceeds from it, or in the case of a surety bond, require the sureties to perform the obligations of the Agreement. As an additional remedy, the City's Engineer may withdraw any previous stormwater - related approval with respect to the property on which BMPs have been installed and /or implemented until such time as Owner repays to City its reasonable costs incurred in accordance with paragraph 3 above. 5. This agreement shall be recorded in the Office of the Recorder of Riverside County, California, at the expense of the Owner and shall constitute notice to all successors and assigns of the title to said Property of the obligation herein set • forth, and also a lien in such amount as will fully reimburse the City, including interest as herein above set forth, subject to foreclosure in even of default in payment. 6. In event of legal action occasioned by any default or action of the Owner, or its • successors or assigns, then the Owner and its successors or assigns agree(s) to pay all costs incurred by the City in enforcing the terms of this Agreement, including reasonable attorney's fees and costs, and that the same shall become a part of the lien against said Property. 7. It is the intent of the parties hereto that burdens and benefits herein undertaken shall constitute covenants that run with said Property and constitute a lien there against. 8. The obligations herein undertaken shall be binding upon the heirs, successors, executors, administrators and assigns of the parties hereto. The term "Owner" shall include not only the present Owner, but also its heirs, successors, executors, administrators, and assigns. Owner shall notify any successor to title of all or part of the Property about the existence of this Agreement. Owner shall provide such notice prior to such successor obtaining an interest in all or part of the Property. Owner shall provide a copy of such notice to the City at the same time such notice is provided to the successor. 9. Time is of the essence in the performance of this Agreement. 10. Any notice to a party required or called for in this Agreement shall be served in person, or by deposit in the U.S. Mail, first class postage prepaid, to the address set forth below. Notice(s) shall be deemed effective upon receipt, or seventy -two (72) hours after deposit in the U.S. Mail, whichever is earlier. A party may • change a notice address only by providing written notice thereof to the other party. IF TO CITY: IF TO OWNER: City of Temecula Dr. Bruce Baker, DMD 41000 Main Street 13422 Pomerado Road, Temecula, CA. 92590 Poway, CA 92064 -3548 • • IN WITNESS THEREOF, the parties hereto have affixed their signatures as of the date • first written above. OWNER: OWNER: tueQ7 •IC:Ikea NAME NAME t� 'a. - ' ' SI NATURE SIGNATURE TITLE TITLE A notary acknowledgement is required for recordation (attach appropriate acknowledgement). State of California County of 1 4 ,✓ a1Z- -S o • Subscribed and sworn to (or affirmed) before me on this /2 day of Cr-, 7 207. by zis r_ - � :Thal , proved to me on the basis of satisfactory evidence to be the person(s) who appeared before me. (Seal) Signature %/ m* ROBERT W. KW 4 Commission # 1884591 +' t . Notary Public - California z ] San Diego County J_ Y y My Comm. Expires Mar 2_9, Y Y Y V♦ V Y V v • EXHIBIT A • (Legal Description) Real Property on the City of Temecula, County of Riverside, State of California, described as follows: PARCEL 1 OF PARCEL MAP 24169, AS SHOWN BY MAP ON FILE IN BOOK 164 PAGES 67 AND 68 OF PARCEL MAPS, RECORDS OF RIVERSIDE COUNTY, CALIFORNIA APN: 921- 310 -018 • EXHIBIT B • EASEMENT NOTES 1 AN EASEMENT FOR UTILITY M <!S PURPOSES TO SOUTHERN W CALIFORNIA EDISON AND CALIFORNIA / �\ . WATER AND TELEPHONE CO., PER / / INSTR. 40992, RECORDED APRIL 19, / �' QY 1988 / 2 AN EASEMENT FOR ROADWAYS, 13,:_?," DRILLING OPERATIONS AND / / / MAINTENANCE PURPOSES TO / / RANCHO CALIFORNIA WATER / DISTRICT., PER INSTR. 54185, / RECORDED MAY 24, 1988 $/ 3 AN EASEMENT FOR POLEUNE TO Si / / SOUTHERN SIERRA POWER CO., PER / / / INSTR., RECORDED MAY 19, 1937 BK PCL 2 OF PM 24169 323, PG 387 OF OFFICIAL RECORDS. / BOOK 164 PP 67 -68 (NOT PLOTTABLE) / P/L 1 OF PM 24169 /4t 4 AN EASEMENT IN FAVOR OF GTE / BOOK 164 PP 67 -68 Xi CALIFORNIA INCORPORATED FOR APN: 921310-018 / UTILITY PURPOSES, PER INSTR. 381882, RECORDED OCTOBER 19, / / • 1989. (BLANKET IN NATURE / / GRAPHIC SCALE EXCLUDING BUILDING SITES) / / it t/ / / (IXR!) / , mee - so rt 4 / / EASEMENT NOTES (CONTINUED) PCL 2 OF PM 47/41 -42 5 AN EASEMENT IN FAVOR OF EASTERN MUNICIPAL WATER I // DISTRICT FOR CONDUITS, RIGHTS / / //4- INCIDENTAL TO, AND INGRESS AND / /k EGRESS AND INCIDENTAL / PURPOSES, BY INSTRUMENTS / / / / RECORDED MARCH 4, 1955 IN / BOOK 1702, PAGE 559; MARCH 4, t--------- / / 1955 IN BOOK 1702, PAGE 487; MARCH 4, 1955 IN BOOK 1702, PAGE 552; MARCH 23, 1959 IN BOOK 2439, PAGE 241; AND e?�+�+ [7 NOVEMBER 12, 1969 AS l \, \ a �, INSTRUMENT NO. 115832 O.R. (NOT y ND /c 4 PLOTTABLE) \_ a B•3 n AN EASEMENT FOR ' ze - UNDERGROUND CONDUITS AND • -� 4411/e INCIDENTAL PURPOSES, RECORDED SEPTEMBER 17, 1992 AS INSTRUMENT NO. 349153 O.R. Water Quality Management Plan (WQMP) Lyndie Lane • Appendix H Phase 1 Environmental Site Assessment — Summary of Site Remediation Conducted and Use Restrictions Water Quality Management Plan (WQMP) Lyndie Lane No environmental site assessment has been conducted for this project. •