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Home My WebLink AboutWQMP Time Warner Cable Server Building Project Specific Final Water Quality Management Plan For: Time Warner Cable Server Building Located on La Serena Way between Via Aguila and Calle Pina Collada in the City of Temecula DEVELOPMENT NO. PR10- 0039 /LD11 -103GR PROJECT NO. Parcel 1 of Parcel Map No. 23890 Project Address 30975 La Serena Road Prepared for: Time Warner Cable Lauren Suzuki, Regional Vice President, Asset Management, West 550 North Continental Blvd El Segundo, CA 90245 Telephone: (818) 407 -4423 Prepared by: Joe Castaneda, P.E. JLC Engineering and Consulting, Inc. 36263 Calle de Lobo Murrieta, CA 92562 Telephone: (951) 304 -9552 Fax: (951) 304 -3568 December 15, 2011 Revised: January 30, 2012 Revised: March 7, 2012 AA- WATER QUALITY MANAGEMENT PLAN (WQMP) INITIAL APPLICABILITY CHECKLIST Applicant Name: l �, 1989 P T IZ I1 � 00) ' �' � P lanning Application Number: � �, Ik r ► l a - Project Name ( ( (� � Does the proposed project incorporate any of the following categories? t l 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. 3 Non - Residential Development - This category includes projects where the land area for development is greater / than 100,000 sq. ft. V 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; glass repair. Restaurants - This category includes all eating and drinking establishments where the land area for development 5a is greater than 5,000 sq. ft. Restaurants where the land area for development is Less than 5,000 sq. ft. are only required to follow the site 56 design and source control requirements of the WQMP. Hillside Development — This category includes any developments that create 5,000 sq. ft. of impervious surface, 6 are located in an area with known erosive soil conditions, and where the project will require grading natural slopes of 25% (4:1) or steeper. Environmentally Sensitive Areas (ESAs) — This category includes all development located within or direcfly 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 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 where the land area for development creates 5,000 sq. ft. or more 8 for the temporary parking or storage of motor vehicles. This category, includes parking areas associated with any of the 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 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, 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 c must be prepared and submitted. Page 1 of 1 Rev. 01 (07/2008) • ...... a WATER QUALITY MANAGEMENT PLAN • — ^. T' „ . CONCEPTUAL ACCEPTANCE CHECKLIST -Y1 • Conceptual Water Ouality 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: WQMP Section Title of Section I Project Description III Pollutants of Concern N 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 Hydrolo i 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 Ouality Management Plan (WOMP) 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: WQMP Section Title of Section I1 Site Characterization V2 Source Control BMP's V.4 Equivalent Treatment Control Alternatives V.5 Regionally -based Treatment Control 13MP'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 i Phase I Environmental Site Assessment Paec t of 4 . Revised 03/20/2009 • • WATER QUALITY MANAGEMENT PLAN y 7 CONCEPTUAL ACCEPTANCE CHECKLIST t s. 1989 Item Addressed? CONCEPTUAL WQMP REQUIREMENTS Yes No Not Applicable General Three -Ring Binder IA _ Tabbed A • • • ndices Tale Pa-e WIAI Table of Contents Section 1. Pro'ect Desch. tion in narrative form Pro'ect location Pro ect size (to the nearest 1/10 acre) Standard Industrial Classification (SIC) Code • W- _ Description and location of all buildings, proposed activities, locations of these activities, s, materials and products to o be a used d and and stored for fur each activity and at each building, delivery areas, and what kinds of wastes will be generated from each building and the entire •roect Pro ect watershed and sub - watershed • 1 Formation of a Home Owner's or Pro•crty Owner's Association Additional permits /approvals required for the project including: • State Department of Fish and Game. 1601 Streambed Alteration Agreement; V • State Water Resources Control Board. General Construction Permit; • Regional Board, 901 Water Quality Certification; • U5 Army Corps of Engineers, 404 permit: • US Fish and Wildlife, Endangered Species Act section 7 biological opinion: • Munici•al, oradin• and buildinn • rmits. Section III. Pollutants of Concem (in narrative form) Completed table of potential and expected pollutants. sources, and 303(d) listings Pollutants of Concern - Wr�— Legacy pollutants as a result of past uses Er- Section IV. H drolo • is Conditions of Concern in narrative form Condition A, B, or C. lf none. evaluation of impacts to downstream erosion or stream habitat fl Completed Storm Event surface hydrology table Section V. Best Management Practices VI_ She Design BMP. Table 1. Site Design BMPs is complete • Narrative describing all site design BMPs proposed for the project Explanation for each BMP NOT used and why they cannot be implemented 1 Site Design BMPs shown on the WQMP Site Plan (Appendix BI W- Page 2 of 4 Revised 03/20/2009 • WATER QUALITY MANAGEMENT PLAN • CONCEPTUAL ACCEPTANCE CHECKLIST (989 Item Addressed? CONCEPTUAL WQMP REQUIREMENTS Yes No Not Applicable Vi. Treatment Control BMP., Table 3. Treatment Control BMPs is complete Narrative describing all treatment control BMPs proposed for the project V 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 8) Section VI. Operation and Maintenance (O&M) Responsibility for Treatment Control BMPs Completed cost and O &M table BMPs requiring O &M arc identified BMP star -up dates Schedule of the frequency of O &M for each BMP • Parties responsible for O &M Description of water quality monitoring, if required Appendix B Site Plan depicting the following project features: Location and identification of all structural BNIPs ✓ Landscape areas Hardscape areas 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, V / etc.) Infrastructure (i.e.: streets, storm drains) 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. Discharge points where onsite or tributary offsite flows exit the site. ✓ l 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 • • - WATER QUALITY MANAGEMENT PLAN CONCEPTUAL ACCEPTANCE CHECKLIST Rem Addressed? CONCEPTUAL WQMP REQUIREMENTS Yes No Applicable Post - project topography. ✓ Appendix C Surface Hydrology report Appendix E ■ Property /project soils report and percolation lest results .✓ Appendix F Treatment Control BMP sizing calculations and design details V Manufacturers specs (End of Conceptual Acceptance Checklist) • Checklist Ior Conceptual Acceptance doc Page 4 of 4 • Revised 03/20/2009 • 7 WATER QUALITY MANAGEMENT PLAN • , 4 no FINAL ACCEPTANCE CHECKLIST 1989 y The purpose of this checklist is to provide a format for uniform, comprehensive, and well- documented reviews of project - specific Water Quality Management Plans (WQMPs) submitted by project owners. The completed checklist should accompany the WQMP and submitted to the City of Temecula. SUMMARY OF WOMP REQUIREMENTS (PLEASE LIST THE FOLLOWING INFORMATION) Section I. Watershed and Sub - Watershed: Santa Margarita River and I (�. \.9 a 1 2, Land s• cghtrb! S+tvi1,'o.4 Section II. Land -Use Category (from Initial Checklist): •. w• P. 0 I w:• � Nth • uit' VlMO 010 • ckQ Pt Section III. Pollutants (expected and potential): (, t)'V I P, J/r,1 rh I11 -u 1 1 `� tM 1 i &116 • a /ad. MA ►I.6.0. 1 . 1 ‘1 /,..1 I,� a.. a I.taku!,s t ALFA • • %'►_I i• :' .('1.. ��I• D i R� •u1 : Ili: 5. Section IV. Exemption Category (A, B, C, or Not Exempt): kI(A ) 3r r `^Y i •f— Sec 'on V. Treatment BMP Category(les): t ( t1 \t( (PlAablei 1'40 C 2) Section VI. Party(ies) responsible for BMP installation and maintenance:1f o d RK W 1 Section VII. Funding source(s) for BMP maintenance: Trin Q Vfl t Yt MA 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 \ WATER QUALITY MANAGEMENT PLAN • 1 =1 FINAL ACCEPTANCE CHECKLIST Not WQMP REQUIREMENT Yes No Applicable Title Page Name of project with Tract, Parcel, or other I.D. number 1/ Owner/Developer name, address & telephone number - ✓ / Consulting/Engineering firm, address & phone number V Preparer's Registered Professional Engineers' Stamp and Signature 1/ Date WQMP was prepared i / Certification Statements Signed Engineer's certification statement '1 Signed and notarized Owner's certification statement Table of Contents Completed and includes all figures, appendices (A -H), and design worksheets ✓ Section 1. Project Description (in narrative form) / • Project location ;/ . 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 Association 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 • Regional Board, 401 Water Quality Certification; • US Army Corps of Engineers, 404 permit; • US Fish and Wildlife, Endangered Species Act section 7 biological opinion;. Vi' • Municipal, grading and building permits. ✓ Section II. Site Characterization (in narrative form) Land use designation or zoning Current and proposed property use 1. Soils report (Appendix E) Phase 1 Site Assessment or summary of assessment or remediation (Appendix H) Identification of Receiving waters (including 303(d) listed waters, Designated beneficial uses, and any RARE beneficial use waters) and their existing impairments • Page 2 of 5 Revised 03/20/2009 WATER QUALITY MANAGEMENT PLAN • �. � FINAL ACCEPTANCE CHECKLIST E 1999 Not WQMP REQUIREMENT Yes No Applicable Section III. Pollutants of Concern (In narrative form) Completed table of potential and expected pollutants, sources, and 303(d) listings Pollutants of Concem q ✓ Legacy pollutants as a result of past uses Section IV. Hydrologic Conditions of Concern (In narrative form) Conditions A, B, or C. If none, evaluation of impacts to downstream erosion or stream habitat Completed Storm Event surface hydrology table Section V. Best Management Practices VI. Site Design BMPs ,a :per , it Table 1. Site Design BMPs is complete Narrative describing all site design BMPs proposed for the project .✓ • Explanation for each BMP NOT used and why they cannot be implemented V Site Design BMPs shown on the WQMP Site Plan (Appendix B) V2. Source Control BMPs r Table 2. Source Control BMPs is complete Narrative describing the source control BMPs proposed for the project Narrative describing the source control BMPs that were NOT applicable and why / they cannot be implemented l� Inspection and maintenance frequency, inspection criteria, and the responsible entity or party Structural source controls shown on the WQMP Site Plan (Appendix B) 1 Treatment Control BMPs e Table 3. Treatment Control BMPs is complete Narrative describing all treatment control BMPs proposed for the project 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) V4 Equivalent Treatment Control Alternatives ' . Mar • Page 3 of 5 Revised 03/20/2009 WATER QUALITY MANAGEMENT PLAN • "� =` +` FINAL ACCEPTANCE CHECKLIST kw / 1989 Not WQMP REQUIREMENT Yes No Applicable Narrative describing equivalent treatment control alternatives 1 i Calculations for Equivalent Treatment Control Alternatives (Appendix F) \,/'/ V5. Regionally -Based Treatment Control BMPs Narrative describing regionally -based treatment control BMPs Calculations for Regionally -Based Treatment Control BMPs (Appendix F) Section VI. Operation and Maintenance (O &M) Responsibility for Treatment Control BMPs Completed cost and O &M table BMPs requiring O &M are identified BMP start -up dates Schedule of the frequency of O&M for each BMP 11 Parties responsible for O &M • Description of water quality monitoring, if required 'V S ection VII. Funding Signed funding certification statement Appendix A (Section ¢ Signed copy of the final Conditions of Approval ✓ Appendix B (Sections I and V) Vicinity Map identifying the project site Receiving Waters Map , Site Plan depicting the following project features: �a2 Location and identification of all structural BMPs. / Landscape areas. V . / Hardscape areas. V V Paved areas. Number and type of structures and intended uses. (ie: buildings, tenant spaces, dwelling units, community facilities such as pools, recreations facilities, tot lots, etc.). Infrastructure (ie: streets, storm drains). • Page 4 of 5 Revised 03/20/2009 WATER QUALITY MANAGEMENT PLAN • F a ":\ FINAL ACCEPTANCE CHECKLIST c Y A 1989 r Not WQMP REQUIREMENT Yes No Applicable 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 or indirectly discharges into. (/ Discharge points where onsite or tributary offsite flows exit the site. Proposed drainage areas boundaries, including tributary offsite areas, for each location where flows exit the site. (Each tributary area should be clearly denoted.) Post-project topography. Landscape Plans showing the structural treatment BMPs. 1/ Appendix C (Section M // Surface Hydrology report I V Appendix D (Section V) • Educational materials. `/ I I Appendix E (Sections II and V) Property/project soils report and percolation test results A71 Appendix F (Section V) Treatment Control BMP sizing calculations and design details Manufacturers specs / Appendix G (Sections I and VI) / CC &Rs, Covenant and Agreements, or other mechanisms used to ensure the ongoing operation, maintenance, funding, and transfer of the WQMP requirements 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 Final Water Quality Management Plan For: Time Warner Cable Server Building Located on La Serena Way between Via Aguila and Calle Pina Collada in the City of Temecula DEVELOPMENT NO. PR10- 0039 /LD11 -103GR PROJECT NO. Parcel 1 of Parcel Map No. 23890 Project Address 30975 La Serena Road • Prepared for: Time Warner Cable Lauren Suzuki, Regional Vice President, Asset Management, West 550 North Continental Blvd El Segundo, CA 90245 Telephone: (818) 407 -4423 Prepared by: Joe Castaneda, P.E. JLC Engineering and Consulting, Inc. 36263 Calle de Lobo Murrieta, CA 92562 Telephone: (951) 304 -9552 Fax: (951) 304 -3568 December 15, 2011 Revised: January 30, 2012 • Revised: March 7, 2012 Water Quality Management Plan (WQMP) Time Warner Cable Server Building AI ENGINEER'S CERTIFICATION "I certify under penalty of law that this document and all attachments and appendices were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted." -71-7i,Zatta January 30, 2012 y 1 i Engineer's Signature Date rikeFESS/0 c ar . C.48 co S tii n NO. 59835 EXP. 12!31!13 At sT CIVIL . TF OF e..Alr • December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building OWNER'S CERTIFICATION This project- specific Water Quality Management Plan (WQMP) has been prepared for: Time Warner Cable - West Region by JLC Engineering and Consulting, Inc. for the project known as Time Warner Cable Server Building, generally bounded by La Serena Way to the north and west, residential homes to the east, and undeveloped area to the south. This WQMP is intended to comply with the requirements of The City of Temecula for PARCEL 1 OF PARCEL MAP NO. 23890, 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 to approve implementation of this WQMP. The undersigned is aware that implementation of this WQMP is enforceable under The 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 that the W SMP will be transferred to future successors in interest." _ earilas. _ 3 -/4 / Owner's Signature Date LLt,Ufe i1 SU tt.i $ 1 111'1f td N 1�'\ P/ PCSS (tiAC(VV.ICtk_4b'IRYI " Owner's Printed Name elk it: Owner'sTitle/Position c December 15, 2011 ACKNOWLEDGMENT State of Californian County of pcpi4 7 ) On (V! fte 4 (t26Iz 1 ' ' before me, tt(*pjt_ 6. 611 41. - CtaS ,poguc, ( (insert name and title of the officer) personally appeared �02r-1102r � 07 L31LL who proved to me on the basis of satisfactory evidence to be the person* whose name(4) is /are subscribed to the within instrument and acknowledged to m e that ice /she /they executed the same in tais /her /their authorized capacity(ies -), and that by his /her /their signature() on the instrument the person(s)- .v-the entity upon behalf of which the per son( acted, executed the instrument. I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct. .., ' MICHAEL ELLIOTT SLOAN WITNESS my hand and official seal. 4 t Commission N 1820498 't' " Notary Public • California I Los Angeles County C Comm. Ex fires Oct 28, 2012 Signature /W1 /`„j/ (Seal) C Water Quality Management Plan (WQMP) Time Warner Cable Server Building Contents Section Page I PROJECT DESCRIPTION A -I II SITE CHARACTERIZATION A -6 III POLLUTANTS OF CONCERN A -8 IV HYDROLOGIC CONDITIONS OF CONCERN A -11 V BEST MANAGEMENT PRACTICES A-11 V. I Site Design BMPs A -13 V.2 Source Control BMPs A -16 V.3 Treatment Control BMPs A -22 V.4 Equivalent Treatment Control Alternatives A -27 V.5 Regionally -Based Treatment Control BMPs A -27 VI OPERATION AND MAINTENANCE RESPONSIBILITY FOR TREATMENT CONTROL BMPS A -28 VII FUNDING A -33 • APPENDICES A. CONDITIONS OF APPROVAL B. VICINITY MAP, WQMP SITE PLAN, AND RECEIVING WATERS MAP C. SUPPORTING DETAIL RELATED TO HYDRAULIC CONDITIONS OF CONCERN (IF APPLICABLE) D. EDUCATIONAL MATERIALS E. SOILS REPORT OF APPLICABLE) F. TREATMENT CONTROL BMP S IZING CALCULATIONS AND DESIGN DETAILS 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 H. PHASE 1 ENVIRONMENTAL SITE ASSESSMENT - SUMMARY OF SITE REMEDIATION CONDUCTED AND USE RESTRICTIONS )• A -i December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building I. Project Description Instructions: The project description shall be completely and accurately described in narrative form. In the field provided on page A -3, describe and with supporting figures (maps or exhibits), where facilities will be located, what activities will be conducted and where, what kinds of materials will be used and/or stored, how and where materials will be delivered, and the types of wastes that will be generated. The following information shall be described and/or addressed in the "Project Description" section of the project- specific WQMP: Project owner and WQMP preparer; Project location; Project size; Standard Industrial Classification (SIC), if applicable; Location of facilities; Activities and location of activities; Materials Storage and Delivery Areas; Wastes generated by project activities. • Location of Facilities The proposed project, the Time Warner Cable Server Building, consists of approximately 0.65 acres of building, driveway and parking lot area located in the City of Temecula. The project is located along La Serena Way, north of Rancho California Road and, as shown on Exhibit "A ". The project is generally bounded by La Serena Way to the north and west, residential homes to the east, and undeveloped/open space to the south. The site plan included in Appendix B shows where the facilities will be located. A vicinity map depicting the project site with respect to identifiable major roadways, geographic features, and landmarks is shown on page 2. Existing Site The existing site is mostly undeveloped, with one existing building and two minor dirt roads crossing the site. �• A- l December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • U rlmaG 0 • . emeeula 020 '] Mapquest • Portions @2011 NAYtt htermap I Terms • Proposed Site The proposed project will construct a 3,270 ft building, 2,600 ft concrete parking area, six 45 ft concrete pads, a 223 ft concrete pad, 6,898 ft2 of gravel area (driveway), 15,054 ft of pervious area, 8" subsurface storm drain, a subsurface basin, and a bioretention basin. Location of Activities This location does not have daily employees, as this is a cable server building only. The only onsite activities will be routine or emergency maintenance of the facility, however, pollution - prevention literature will still be distributed to all employees. Material Storage There are no material storage areas designated for the project site and no designated common areas for trash, as this location does not produce trash. There will only be employees onsite for routine maintenance, not daily activities. Delivery Areas There are no specific loading or unloading docks or areas designated for the project site. Waste Generated No waste is expected to be generated, as there are no daily employees to produce the waste. The primary ,• pollutants of concern can be found in Section III on page 6. A -2 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Project Owner: Time Warner Cable — West Region Peter Hidalgo — Director of Governmental Relations 30975 La Serena Road Temecula, CA 92591 (909) 975-3445 WQMP Preparer: Joe Castaneda, P.E. 36263 Calle de Lobo Murrieta, CA 92562 Telephone: 951 - 304 -9552 • 'l. A -3 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building Project Site Address: Along La Serena Way between Via Aguila and Calle Pina Colada • Temecula, CA Planning Area/ Community Name/ Development Name: Parcel 1 of Parcel Map No. 23890, PR10 -0039 APN Number(s): Portions of 953 - 050 -016 Thomas Bros. Map: 959 -C4, 2010 Project Watershed: Santa Margarita (HA 902.00) Sub - watershed: Temecula Creek (HSA 902.51 and 902.52) Project Site Size: 0.65 acres gross, 0.37 acres disturbed Standard Industrial Classification (SIC) Code: N/A Server Building Formation of Home Owners' Association (HOA) or Property Owners Association (POA): No Y ❑ N ® Entity for O &M is Time Warner Cable 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 ❑ NZ (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 ❑ NZ biological opinion Other (please list in the space below as required) City of Temecula Grading Permit Y Z tv❑ City of Temecula Building Permit Y ® NO 41 A-4 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building Appendix A of this project- specific WQMP includes a complete copy of the final Conditions of Approval. Appendix B of this project - specific WQMP shall include: I. A Vicinity Map identifying the project site and surrounding planning areas in sufficient detail to allow the project site to be plotted on Co- Permittee base mapping; and 2. A Site Plan for the project. The Site Plan included as part of Appendix B depicts the following project features: Location and identification of all structural BMPs, including Treatment Control BMPs. Landscaped areas. Paved areas and intended uses (i.e., parking, outdoor work area, outdoor material storage area, sidewalks, patios, tennis courts, etc.). Number and type of structures and intended uses (i.e., buildings, tenant spaces, dwelling units, community facilities such as pools, recreation facilities, tot lots, etc.). Infrastructure (i.e., streets, storm drains, etc.) that will revert to public agency ownership and operation. Location of existing and proposed public and private storm drainage facilities (i.e., storm drains, channels, basins, etc.), including catch basins and other inlets/outlet structures. Existing and proposed drainage facilities should be clearly differentiated. Location(s) of Receiving Waters to which the project directly or indirectly discharges. Location of points where onsite (or tributary offsite) flows exit the property /project site. Proposed drainage areas boundaries, including tributary offsite areas, for each location where flows exits the • property /project site. Each tributary area should be clearly denoted. Pre- and post - project topography. Appendix G of this project- specific WQMP shall include copies of CC &Rs, Covenant and Agreements, and/or other mechanisms used to ensure the ongoing operation, maintenance, funding, transfer and implementation of the project- specific WQMP requirements. A -5 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building 11. Site Characterization Land Use Designation or Zoning: Open Space Current Property Use: Undeveloped Proposed Property Use: Server/Utility Building for Time Warner Cable Availability of Soils Report: Y ® N ❑ Note: A soils report is required if infiltration BMPs are utilized. Attach report in Appendix E. Phase 1 Site Assessment: Y ❑ N ® Note: If prepared, attached remediation summary and use restrictions in Appendix H. • Receiving Waters for Urban Runoff from Site Instructions: 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. ) 0 A -6 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building Receiving Waters for Urban Runoff from Site Receiving 303(d) List Impairments Designated Proximity to RARE Waters Beneficial Uses Beneficial Use MUN, AGR, IND, NOT A RARE Long Canyon Bacteria & Viruses (Chlorpyrifos, Fecal PROC, REC -2, WATERBODY Coliform), Metals (Iron, Manganese) WARM, WILD 0.4 miles Bacteria & Viruses (Chlorpyrifos), MUN, AGR, IND, NOT A RARE Murrieta Creek Metals (Copper, Iron, Manganese), PROC, REC -2, WATERBODY (HSA 902.32) Nutrients (Nitrogen, Phosphorus), WARM, WILD Pesticides (Toxicity) 2.9 miles Santa Margarita MUN, AGR, IND, A RARE River — Upper Nutrients (Phosphorus), Pesticides REC -1, REC -2, WATERBODY portion (HSA (Toxicity) WARM, COLD, 2.22, 2.21) WILD, RARE 6.0 miles Santa Margarita MUN, AGR, IND, A RARE River — Lower Bacteria & Viruses (Enterococcus, PROC, REC -1, WATERBODY portion (HSA Fecal Coliform), Nutrients REC -2, WARM, 2.13, 2.12, (Phosphorus, Nitrogen) COLD, WILD, 21.0 miles 2.11) RARE REC -1, REC -2, A RARE Santa Margarita Nutrients ( Eutrophic), Sediments EST, WILD, WATERBODY • Lagoon (Eutrophic) RARE, MAR, MIGR, SPWN 32.0 miles IND, NAV, REC -1, REC -2, COMM, A RARE Pacific Ocean None BIOL, WILD, WATERBODY RARE, MAR, AQUA, MIGR, 33.0 miles SPWN, SHELL A - 7 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building III. 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, the 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- specific WQMPs. The Co- Permittee may also require specific 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: I. 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 /tmdl /303d_lists.html. List all pollutants for which the proximate Receiving Waters are impaired. • 3. Compare the list of pollutants for which the proximate Receiving Waters are impaired with the potential pollutants to be generated by the project. Urban Runoff Pollutants: See following page A -8 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Attachment to Section III 1. Addressed in Section II, Receiving Waters Table. 2. Addressed in Section II, Receiving Waters Table. 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 POTENTIAL SOURCE 303 (d) LISTING Expected Potential Sediment/Turbidity Landscaped Areas Yes Nutrients Landscaped Areas Santa Margarita River - Upper Organic Compounds Vehicles No Trash and Debris Homes No Oxygen Demanding Landscaped Areas No Substances Bacteria and Viruses Pets Yes Oil and Grease Vehicles No Pesticides Landscaped Areas and Homes Yes Metals Vehicles Yes Pollutant of Concern: Murrieta Creek is listed on the 2010 Clean Water Act Section 303(d) List of Water Quality Limited Segments as being impaired for Sediment (Eutrophic), Nutrients (Nitrogen, Phosphorus), Bacteria & Viruses (Chlorpyrifos, Fecal Colifrom, Enterococcus), Pesticides (Toxicity), and Metals (Iron, Manganese, Copper). As such, these pollutants are the Pollutants for Concern for this Project. Legacy Pollutants: Project area is open space area with one building and dirt roads adjacent to the MWD easement. The project area did not have a history of uses that implemented the presence of legacy pollutants such as pesticides, nutrients, or hazardous substances in the site's soil. A -9 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Description of Urban Runoff Pollutants of Concern Expected, per above tables: • Pathogens — Pathogens (bacteria and viruses) are ubiquitous microorganisms that thrive under certain environmental conditions. Their proliferation is typically caused by the transport of animal or human fecal wastes from the watershed. Water, containing excessive bacteria and viruses can alter the aquatic habitat and create a harmful environment for humans and aquatic life. Also, the decomposition o excess organic waste causes increased growth of undesirable organisms in the water. • Nutrients — Nutrients are inorganic substances, such as nitrogen and phosphorus. They commonly exist in the form of mineral salts that are either dissolved or suspended in water. Primary sources of nutrients in Urban Runoff are fertilizers and eroded soils. Excessive discharge of nutrients to water bodies and streams can cause excessive aquatic algae and plant growth. Such excessive production, referred to as cultural eutrophication, may lead to excessive decay of organic matter in the water body, loss of oxygen in the water, release of toxins in sediment, and the eventual death of aquatic organisms. • Pesticides — Pesticides (including herbicides) are chemical compounds commonly used to control nuisance growth or prevalence of organisms. Excessive or improper application of a pesticide may result in runoff containing toxic levels of its active ingredient. • Sediments — Sediments are soils or other surficial materials eroded and then transported or deposited by the action of wind, water, ice, or gravity. Sediments can increase turbidity, clog fish gills, reduce spawning habitat, lower young aquatic organisms survival rates, smother • bottom dwelling organisms, and suppress aquatic vegetation growth. • Trash and Debris — Trash (such as paper, plastic, polystyrene packing foam, and aluminum materials) and biodegradable organic matter (such as leaves, grass cuttings, and food waste) are general waste products on the landscape. The presence of trash and debris may have a significant impact on the recreational value of a water body and aquatic habitat. Excess organic matter can create a high biochemical oxygen demand in a stream and thereby lower its water quality. In addition, in areas where stagnant water exists, the presence of excess organic matter can promote septic conditions resulting in the growth of undesirable organisms and the release of odorous and hazardous compounds such as hydrogen sulfide. • Oxygen- Demanding Substances — This category includes biodegradable organic material as well as chemicals that react with dissolved oxygen in water to form other compounds. Proteins, carbohydrates, and fats are examples of biodegradable organic compounds such as ammonia and hydrogen sulfide are examples of oxygen- demanding compounds. The oxygen demand of a substance can lead to depletion of dissolved oxygen in a water body and possibly the development of septic conditions. • Oil and Grease — Oil and grease are characterized as high - molecular weight organic compounds. Primary sources of oil and grease are petroleum, hydrocarbon products, motor products from leaking vehicles, esters, oils, fats, waxes, and high molecular- weight fatty acids. Introduction of these pollutants to the water bodies are very possible due to the wide uses and applications of some of these products in municipal, residential, commercial, industrial, and construction areas. Elevated oil and grease content can decrease the aesthetic value of the • water body, as well as the water quality. A -10 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building IV. Hydrologic Conditions of Concern Impacts to the hydrologic regime resulting from the Project may include increased runoff volume and velocity; reduced infiltration; increased flow frequency, duration, and peaks; faster time to reach peak flow; and water quality degradation. Under certain circumstances, changes could also result in the reduction in the amount of available sediment for transport; storm flows could fill this sediment - carrying capacity by eroding the downstream channel. These changes have the potential to permanently impact downstream channels and habitat integrity. A change to the hydrologic regime of a Project's site would be considered a hydrologic condition of concern if the change would have a significant impact on downstream erosion compared to the pre - development condition or have significant impacts on stream habitat, alone or as part of a cumulative impact from development in the watershed. This project - specific WQMP must address the issue of Hydrologic Conditions of Concern unless one of the following conditions are met: Condition 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 the 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. Condition 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- Permittee. This Project meets the following condition: This project satisfies Condition A. Stormwater runoff will be discharged directly to the Margarita into MS4 facilities that connects directly to Long Canyon and Murrieta Creeks. The discharge will be in full compliance with co- permittee requirements for connections and discharges to the MS4. • A -11 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • }5 I ciO w -�M' 4y, " a. a�.y �' �, a y..�.+ t n >: is 0. .'" 4.i"�,y' �{+ �:x r 0 � i xx, q. 4 g �'s �+ a �7 a ff . 'kfi 5 § ANp,�pY3f' , §�^`�r ` ' y + T',fa"Sfxk ?x, �� *tvti+ �""'mt A: ' ✓"-4nt ' co �' h''+'," � ' „ fr,„ ' i f *4 . ,, ^ t q a+ xy±..s. # Y.. a,$! " n � - ' -�. - .. 2: s: de ;dya r w . # ° " a. Jie - - taw). .f e a - e = � n e > > M. e . t- a t 91: talk • Q (cfs) (1) (1) (1) (1) (1) (1) Velocity (1) (1) (1) (1) (1) (1) (Ws) Volume (1) (1) (1) (1) (1) (1) (ac -ft) Duration (1 ) (1) (1) (1) (1) (1) (minutes) (1) — No data is available for these values since project discharges into an MS4 facility. However, 10 -year and 100 -year rational method hydrology calculations were performed. A summary of these flow rates is provided below, and the report has been included in Appendix C. 10 -Year 2 2.32 100 -Year 3.75 3.63 • i • A -12 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building a . 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 / 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 1. 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 4.5.1 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. A -13 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Table 1. Site Design BMPs Included Design Technique Specific BMP Yes No WA Concept Maximize the permeable area (See Section 4.5.1 of the ® ❑ ❑ WQMP). Incorporate landscaped buffer areas between sidewalks ❑ ❑ and streets. w Maximize canopy interception and water conservation by y preserving existing native trees and shrubs, and planting ❑ ❑ Minimize additional native or drought tolerant trees and large U shrubs. Urban Use natural drainage systems. ❑ ❑ Where soils conditions are suitable, use perforated pipe ® ❑ ❑ m Runoff or gravel filtration pits for low flow infiltration. N Con onsite ponding areas or retention facilities to increase opportunities for infiltration consistent with ® ❑ ❑ vector control objectives. Other comparable and equally effective site design concepts as approved by the Co- Permittee (Note: ❑ ❑ A El dditional narrative required to describe BMP and how it addresses Site Design concept). • A -I4 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Table 1. Site Design BMPs (Cont.) Included Design Technique Specific BMP Yes No N/A Concept Maximize the permeable area (See Section 4.5.1 of the ® ❑ ❑ WQMP). Construct walkways, trails, patios, overflow parking N lots, alleys, driveways, low- traffic streets and other low a - traffic areas with open - jointed paving materials or ❑ 0 ❑ u Minimize permeable surfaces, such as pervious concrete, t C porous asphalt, unit pavers, and granular materials. Impervious Construct streets, sidewalks and parking lot aisles to the minimum widths necessary, provided that public C safety and a walk able environment for pedestrians are ® ❑ ❑ m Footprint not compromised. FA Reduce widths of street where off- street parking is ❑ ❑ available. Minimize the use of impervious surfaces, such as ❑ ❑ LE 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 Design concept). q Conserve natural areas (See WQMP Section 4.5.1). ❑ 0 ❑ M u u Conserve Maximize canopy interception and water conservation preserving existing native trees a s an d ❑ ❑ planting additional native or drought tolerant trees and large shrubs. en Natural y Use natural drainage systems. ❑ ❑ Other comparable and equally effective site design M Areas concepts as approved by the Co- Permittee (Note: 0 ❑ ❑ y Additional narrative required describing BMP and how it addresses Site Design concept). I A -I5 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • 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; periodic swale inlets drain to vegetated swale/biofilter. ❑ ❑ ti d Directly Dual drainage system: First flush captured in street catch basins and discharged to adjacent vegetated ❑ ® ❑ 0 Connected swale or gravel shoulder, high flows connect directly to MS4s. o f Design driveways with shared access, flared (single Impervious lane at street) or wheel strips (paving only under tires); ❑ ❑ • 8 or, drain into landscaping prior to discharging to the y Areas MS4. Uncovered temporary or guest parking on private residential lots may be paved with a permeable ❑ ❑ El (DCIAs) 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-Perm ittee (Note: ® ❑ ❑ Additional narrative required describing BMP and how it addresses Site Design concept). Non - applicable Site Design BMPs: • Incorporate landscaped buffer areas between sidewalks and streets. — NIA o The project does not propose streets. • Maximize canopy interception and water conservation by preserving existing native trees and shrubs , and planting additional native or drought tolerant trees and large shrubs — N/A • o The proposed project does not incorporate additional trees and shrubs. A- I6 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Use natural drainage systems. — N/A o The site was previously graded and does not incorporate natural drainage areas. • Reduce widths of street where off -site parking is available. — N/A o The proposed project does not incorporate streets or off -site parking. • Where landscaping is proposed in parking areas, incorporate landscape areas into the drainage design. — N/A o The proposed project does not incorporate landscaped areas. • Rural swale system: street sheet flows to vegetated swale or gravel shoulder, curbs at street corners, culverts under driveways and street crossings. — N/A o The proposed project does not incorporate streets. • Urban curb /swale system: street slopes to curb; periodic swale inlets drain to vegetated swale/biofilter. — N/A o The proposed project does not incorporate streets. • Design driveways with shared access, flared (single lane at street) or wheel strips (paving only under tires); or, drain into landscaping prior to discharging to the MS4. — N/A o The proposed project does not incorporate driveways. • Uncovered temporary or guest parking on private residential lots may be paved with a permeable surface, or designed to drain into landscaping prior to discharging to the MS4. — N/A • o The proposed project does not incorporate temporary or guest parking. • Overflow parking (parking stalls provided in excess of the Co- Permittee's minimum parking requirements) may be constructed with permeable paving. — N/A o The proposed project does not incorporate overflow parking. Project Site Design BMPs: Site Design Concept #1 Minimize Urban Runoff • Maximize the permeable area — YES o The proposed project will utilize the minimum amount of impervious area required for the project site. • Where soil conditions are suitable, use perforated pipe or gravel filtration pits for low flow infiltration — YES o The proposed project incorporates a bioretention basin and a subsurface basin which utilize filtration. • Construct onsite ponding areas or retention facilities to increase opportunities for infiltration consistent with vector control objectives — YES o The proposed project incorporates a bioretention basin and a subsurface basin. • Other comparable and equally effective site design concepts as approved by the Co- Permittee — YES o The proposed project will utilize the effectiveness of filtration within the project site to treat flows prior to discharging into the MS4 facility. A -17 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Site Design Concept #2 Minimize Impervious Footprint • Maximize the permeable area — YES o The proposed project will utilize the minimum amount of impervious area required for the project site. • Construct walkways, trails, patios, overflow parking lots, alleys, driveways, low- traffic streets and other low- traffic areas with open- jointed paving materials or permeable surfaces, such as pervious concrete, porous asphalt, unit pavers, and granular materials —NO o The walkways and parking areas will be constructed with concrete. • Construct streets, sidewalks and parking lot aisles to the minimum widths necessary, provided that public safety and a walk able environment for pedestrians are not compromised. — YES o Sidewalks and parking stalls will be constructed per the City of Temecula standards. • Minimize the use of impervious surfaces, such as decorative concrete, in the landscape design — YES o The proposed project does not incorporate decorative concrete. • Other comparable and equally effective site design concepts as approved by the Co- Permittee — YES o The proposed project will utilize the effectiveness of filtration within the project site to treat flows prior to discharging into the MS4 facility. • Site Design Concept #3 • Other comparable and equally effective site design concepts as approved by the Co- Permittee — YES o The proposed project will utilize the effectiveness of filtration within the project site to treat flows prior to discharging into the MS4 facility. Site Design Concept #4 Minimize Directly Connected Impervious Areas (DCIAs) • 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 - YES o The entire roof runoff will be conveyed to the southerly subsurface basin where the required flows will be infiltrated. • Increase the use of vegetated drainage swales in lieu of underground piping or imperviously lined swales — YES o The project does not include impervious lined channels, and uses the minimum amount of subsurface storm drain required. • Dual drainage system: First flush captured in street catch basins and discharged to adjacent vegetated Swale or gravel shoulder, high flows connect directly to MS4s. — YES l • o All onsite flows are conveyed to the bioretention basin or the subsurface basin for treatment for water quality purposes prior to being discharged to the MS4 facility. A -l8 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • • Other comparable and equally effective site design concepts as approved by the Co- Permittee — YES o The proposed project will utilize the effectiveness of filtration within the project site to treat flows prior to discharging into the MS4 facility. • • A -19 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • V.2 SOURCE CONTROL BMPs Instructions: Complete Table 2. Table 2. Source Control BMPs Check One If not applicable, state BMP Name Not Included Applicable brief reason Non Sbvcttiref Source Control BMPs Education for Property Owners, Operators, Tenants, Occupants, ® ❑ or Employees Activity Restrictions Qg • Irrigation System and Landscape Maintenance LJ • N/A for project development Common Area Litter Control N/A for project development Street Sweeping Private Streets and Parking Lots ❑ ® N/A for project development Drainage Facility Inspection and Maintenance ® ❑ StructuralSourceContiolBMPs- MS4 Stenciling and Signage ® ❑ Landscape and Irrigation System Desiqn ❑ ® N/A for project development Protect Slopes and Channels ❑ ® N/A for project development Provide Community Car Wash Racks ❑ ® N/A for project development Properly Design: • • Fueling Areas • ►5 N/A for project development Air Water Supply Area Drainage ❑ ►5 N/A for •ro'ect development • Trash Storage Areas • Loading Docks LJ ►1 _ NIA for project development Maintenance Bays ❑ ►5 N/A for project development Vehicle and Equipment Wash Areas ❑ ® N/A for project development Outdoor Material Storage Areas ❑ ® N/A for project development Outdoor Work Areas or Processing Areas ❑ ® N/A for project development Provide Wash Water Controls for Food Preparation Areas ❑ ® N/A for project development Non - Structural Source Control BMP's Non - Structural Source Control BMP's • Education for Property Owners, Tenants, and Occupants — YES o Time Warner will be provided a copy of the WQMP, and the Time Warner employees that will do routine maintenance or emergency maintenance shall be provided a copy of the education materials. Annually, the representatives of Time Warner; their employees, landscapers, property managers, and other parties responsible for proper functioning of the BMPs will receive verbal and written training regarding the function and maintenance of the residential BMPs. • Activity Restrictions — YES o Activity restrictions will be enforced. These restrictions include: Prohibit blowing debris into the bioretention basin • Prohibit dumping of oils into the parking areas Prohibit discharges of paint or masonry wastes to parking areas. A -20 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Irrigation System and Landscape Maintenance - NO o The project does not incorporate landscaped areas. • Common Area Litter Control — NO o The project does not produce waste and does not have common area litter control. • Drainage Facility Inspection and Maintenance - YES o The bioretention basin and subsurface basin will be inspected and maintained by Time Warner. Structural Source Control BMP's Structural Source Control BMP's • MS4 Stenciling and Signage - YES o The project will incorporate MS4 Stenciling and Signage at bioretention basin. • Landscape and Irrigation System Design - NO o The project does not incorporate landscaped areas. • Protect Slopes and Channels —NO o The project does not incorporate slopes or channels. Appendix D will include copies of the educational materials that will be used in implementing this project- ', specific WQMP during final engineering. • A -2I December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Attachment to Section V.2 ACTIVITY„ SPECIFIC FREQUENCY -i- x RESPONSIBI E PARTY '� ' y - r Non StructuPBI Source Controls .�, Key r . .... `i .-. 1`a`.. ., 5�. ..a ..v . L,. y rci m -. .._.. . _ . ° i ;` .. V.'E Provided upon project Education completion and annually Project Developer/Time Warner thereafter Activity Restrictions Daily Time Warner Common Area Landscape N/A N/A Maintenance Litter Control in Common Areas N/A N/A Street Sweeping Private Streets N/A N/A and Parking Areas Private Drainage Inspection and Monthly Time Warner Maintenance ' f i$ N.�v 0? '- ."�,[ h. x Y s ,y x t`7 ,ro -r .k,e y j,. t:� {x 0,44 x y S Y S- 3 x a t a �"t 4'' ��.+,+ n StTRCtpC Source tContTO1S „ t i �3, ,� l ;� m,,• �' - � 3''� 's 4 e * '� i �` ^ r �� ' ;. •� t.. +�� N = :.,'�.? Stenciling and Signage Bi- annually Time Warner Irrigation System Maintenance N/A N/A Slopes and Channels N/A N/A l e A -22 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • V.3 TREATMENT CONTROL BMPs Instructions: 1. Provide narrative below describing each Treatment Control BMP. Include location, identify the sizing criteria [i.e., Urban Runoff quality design flow (QBMP) or the Urban Runoff quality design volurne (VBMP), 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 B (Riverside County WQMP - General Categories of Pollutants of Concern per the instructions specified in Section III of this Template). or "no" if not identified for the project. ♦ Check the boxes of selected BMPs that will be intplentented for the project to address each pollutant of concern from the project as identified using Exhibit B. Treattnent 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 Treattnent 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 minitnurn requirements of this WQMP to demonstrate that adequate pollutant treamuent is being accomplished. Supporting engineering calculations for QBMP and /or VBMP, and Treatment Control BMP design details are included in Appendix F. Note: Projects that will utilize infiltration -based Treattnent Control BMPs (e.g., Infiltration Basins, Infiltration Trenches, Porous Pavement) must include a copy of the property/project soils report as Appendix E to the project - specific WQMP. The selection of a Treatrnent Control BMP (or BMPs) for the project trust 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 The proposed project incorporates two sand filters to treat for water quality purposes. The Riverside County Stormwater Quality Best Management Practice Design Handbook was utilized for sizing the bioretention basin and the subsurface basin. The Santa Margarita Watershed BMP Design Volume worksheet was utilized for determining the required water quality volume for the areas tributary to the bioretention basin and the subsurface basin. The bioretention basin was designed using the Bioretention Facility — Design procedure worksheet. The subsurface basin was sized to hold the required volume utilizing two 48" pipes. • The bioretention basin is located on the northerly portion of the project site and collects approximately 0.09 acres of area. The required water quality volume is 79 ft and the actual volume of the bioretention basin is 136 ft , which is sufficient volume to treat for water quality. A -23 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building The bioretention basin has a top dimensions of 10' by 27.2', with 3:1 side slopes and a depth of 0.5'. The flows will then be discharged into an 8" pipe, and then be conveyed to the existing MS4 facility. The subsurface basin is located in the southerly portion of the project site and collects flows from 0.16 acres from the southern project area, which includes the entire roof runoff. The minimum required volume for the subsurface basin is 547 ft and the basin has been designed with a volume of 553 ft using two 22 foot long 48 " pipes. The treated flows will discharge into a 6" pipe, which connects to the 8" pipe discharging into the MS4 facility. The design worksheets have been included in Appendix F. • • A -24 December 15, 2011 C) � ; � � m � i � e y � p p , • � � S y ^ � H d � • d 3 o H � W � A s o A 3 p. � � L) N � W e N � O ID a ,� < < � < d < < < � < R < 3 < < S � �? m c�o � � � ❑ � � 2 ❑ � ❑ 'm' ❑ � � � 'v, 3 -i " n m � �' � ° o, W � d. z z z z'" z� z z c z z'� p ,d„ � o ❑ ❑ $ � ❑ � � � � " ❑ ❑ � � 3 „ w w a � 3 � •��• n. � ° A O � � £ � �. � �� O n. � � 3 � C � � � C � r � r � C � r � � 9 � y � C �� m 2 ' � � y � m R e�i �' � � 3 � C ❑ 3 � C ❑ 3 ❑ � ❑ C � � � 3 y . � � ao :� � �z d o � F m � � k. 'o � � d � � � � � ❑=❑c❑c❑3❑3❑c❑c❑3❑3 ;��; • � �o .. m x, d � � oo �. -� � � � N � ni m 3 0 0 `'' 7y � f ^ � ❑ x ❑ c ❑ c ❑ c ❑ _ ❑ c ❑ c ❑ _ ❑ _ � g v o � 3 3 0 � � � ' a " � .. N 3 N m � T � � � - � � � � � � � � � 3 � � � � � 3 � 3 0 °- '� �B � '� � °- � d ; � ° °❑ r❑ r❑ 3❑ r❑ r ❑ 3❑ r❑ r❑ r � d d � � p � m ,� � � _ � �� y = � � �� o � �� N� r � �� 3� �� r � 3� �� `- ❑` 3 3 m� m fD � � N � o ° �°. " � � � �7 �. � '. A � � m � �m � o �' R � � � � ❑ c ❑ c ❑ c ❑ c ❑ c ❑ c ❑ c ❑ c ❑ c �' �, �' a .� ° � � � oa .. Final Water Quality Management Plan (WQMP) Time Warner Cable Server Building 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) Includes grass swales, grass strips, wetland vegetation swales, and bioretention. (3) 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. (4) Includes infiltration basins, infiltration trenches, and porous pavements. (5) Includes permanent pool wet ponds and constructed wetlands. (6) Includes sand filters and media filters. (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. • (9) Project proponents should base BMP designs on the Riverside County Stormwater Quality Best Management Practice Design Handbook. However, project proponents may also wish to reference the California Stormwater BMP Handbook — New Development and Redevelopment (www.cabmphandbooks.coml. The Handbook contains additional information on BMP operation and maintenance. (10) Note: Projects that will utilize infiltration -based Treatment Control BMPs (e.g., Infiltration Basins, Infiltration Trenches, 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. it A -26 December 15, 2011 Final Water Quality Management Plan (WQMP) Time Warner Cable Server Building V.4 EQUIVALENT TREATMENT CONTROL ALTERNATIVES Not Applicable V.5 REGIONALLY -BASED TREATMENT CONTROL BMPs Not Applicable • A -27 December 15, 2011 Final Water Quality Management Plan (WQMP) Time Warner Cable Server Building 0 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. 0 Instructions: Identify 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 C. Operation and maintenance (O &M) requirements for all structural Source Control and Treatment Control BMPs shall be performed as follows: Bioretention Basin Bioretention areas require annual plant, soil, and mulch layer maintenance to ensure optimum infiltration, storage, and pollutant removal capabilities. In general, bioretention maintenance requirements are typical landscape care procedures and include: 1. Watering: Plants should be drought - tolerant. Watering may be required during prolonged dry periods after plants are established. 2. Erosion Control: Inspect flow entrances, ponding area, and surface overflow areas, periodically, and replace soil, plant material, and/or mulch layer in areas if erosion has occurred (see following bioretention inspection and maintenance checklist). Properly designed facilities with appropriate flow velocities should not have erosion problems, except perhaps in extreme events. If erosion problems occur, the following should be reassessed: (1) flow velocities and gradients within the cell, and (2) flow dissipation and erosion protection strategies in the pretreatment area and flow entrance. If sediment is A -28 December 15, 2011 Final Water Quality Management Plan (WQMP) Time Warner Cable Server Building deposited in the bioretention area, immediately determine the source within the contributing area, stabilize, and remove excess surface deposits. 3. Plant material: Depending on aesthetic requirements, occasional pruning and removing of dead plant material may be necessary. Replace all dead plants and if specific plants have a high mortality rate, assess the cause and, if necessary, replace with more appropriate species. Periodic weeding is necessary until plants are established. The weeding schedule should become less frequent if the appropriate plant species and planning density have been used and, as a result, undesirable plants excluded. 4. Nutrients and pesticides: The soil mix and plants should be selected for optimum fertility, plant establishment, and growth. Nutrient and pesticide inputs should not be required and may degrade the pollutant processing capability of the bioretention area, as well as contribute pollutant loads to receiving waters. By design, bioretention facilities are located in areas where phosphorus and nitrogen levels are elevated and these should not be limiting nutrients. If in question, have soil analyzed for fertility. 5. Mulch: Replace mulch annually in bioretention facilities where heavy metal deposition is likely (e.g., contributing areas that include industrial and auto dealer /repair parking lots and roads). In residential lots or other areas where metal deposition is not a concem, replace or add mulch as needed to maintain a 2 to 3 inch depth at least once every two years. 6. Soil: Soil mixes for bioretention facilities are designed to maintain long -term fertility and pollutant processing capability. Estimates from metal attenuation research suggest that metal ;:: • accumulation should not present an environmental concern for at least 20 years in bioretention systems. Replacing mulch in bioretention facilities where heavy metal deposition is likely provides an additional level of protection for prolonged performance. If in question, have soil analyzed for fertility and pollutant levels. A - 29 December 15, 2011 Final Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Inspection and Maintenance Checklist Date: Work Order # Type of Inspection: ❑ post -storm ❑ annual ❑ routine opost-wet season ❑ pre -wet season Facility: Inspector(s): Conditions When Comments or Defect Maintenance is Inspection Result Date Maintenance Actions Taken to Needed (0, 1, 2) Performed Resolve Issue Appearance Untidy Trash, plant litter Trash and Debris and dead leaves Accumulation accumulated on surface. Vegetation Unhealthy plans and appearance • Irrigation Functioning incorrectly Inlet Inlet pipe blocked or impeded Blocks or pads Splash Blocks correctly positioned to prevent erosion Overflow Overflow pipe blocked or broken Infiltration design rate is met (e.g., Filter Media drains 36 -48 hours after moderate — large storm events tMaintenance: Enter 0 if satisfactory, 1 if maintenance is needed and include WO #. Enter 2 if maintenance was performed the same day. • A - 30 December 15, 2011 Final Water Quality Management Plan (WQMP) Time Warner Cable Server Building Subsurface Basin • Maintenance Underground storm water detention and retention systems should be inspected at regular intervals and maintained when necessary to ensure optimum performance. The rate at which the system collects pollutants will depend more heavily on site activities than the size or configuration of the system. Inspection Inspection is the key to effective maintenance and is easily performed. CONTECH recommends ongoing quarterly inspections of the accumulated sediment. Sediment deposition and transport may vary from year to year and quarterly inspections will help insure that systems are cleaned out at the appropriate time. Inspections should be performed more often in the winter months in climates where sanding operations may lead to rapid accumulations, or in equipment washdown areas. It is very useful to keep a record of each inspection. Cleaning Maintaining an underground detention or retention system is easiest when there is no flow entering the system. For this reason, it is a good idea to schedule the cleanout during dry weather. Accumulated sediment and trash can typically be evacuated through the manhole over the outlet orifice. If maintenance is not performed as recommended, sediment and trash may accumulate in front of the outlet orifice. Manhole covers should be securely seated following cleaning activities. • • A -3I December 15, 2011 Final Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Attachment to Section VI LONG TERM MAINTENANC RESPONSIBILITIES In the long -term there will be one party responsible for the operation and maintenance of the BMP facility. Time Warner will be responsible for the long -term maintenance of the post construction BMPs including education, common area maintenance practices, and infiltration trench maintenance. Structural Quantity Capital Annual Start -Up O &M Responsible Responsible BMPs Cost ($) O &M Dates Frequency Funding Funding Costs ($) (weekly Party for Party for /monthly/ installation Long -Term O &M quarterly) Subsurface 1 (two 22' $18,000 $2000 Prior to See O &M Time Time Basin long 48" Occupancy above Warner Warner pipes) Bioretention 1 (10' x $1,500 /EA $1,500 Prior to See O&M Time Time Basin 27.2') Occupancy above Warner Warner • • A -32 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • 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. Time Warner will be responsible for funding. • • A -33 December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Attachment to Section VII. 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 rememdies for the default of responsibilities as provided by the lease contract and law. The owner for Tentative Tract Map 30434 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. "'Owner or Company Official's Signature -- Date - akcen SU.1.1V4 $ TivAQ Vh AQ . (ZV(), I \sSe+ VIAAMcj,evltievtf' Owner or Company Official's Printed Name Cale LLL Owner or Company Official's Title /Position Company Name Ion_ 1N3ctQ_V Q IL VN Ott � � LLt; Company Address e N}. e trx ibi d. 61 9Cq'vvQo i c g o - zAs Phone Number ' t l . L lv Fax Number � 9. cjc\S. 5 3 SV • December 15, 2011 • ACKNOWLEDGMENT State of o f_it County 1V 6 ) ounf_ LL � g�� On ei 2((2 Z ' (2 before me, ►r `I0 f�1 cf'Rtf3 A oI--)Nat RUC_ (insert name and title of the officer) personally appeared (-/o24 ' c)2t1C who proved to me on the basis of satisfactory evidence to be the person(t) whose name( is /are subscribed to the within instrument and acknowledged to m e that he/she /they executed the same in lais /her / their authorized capacity(ies), and that by kis /her /their signatures) on the instrument tlas pe s s),-er the entity upon behalf of which the per son(t) acted, executed the instrument. I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct. MICHAEL ELUOTT SLOAN WITNESS my hand and official seal. r si m Commission N 1820496 ti `'*+% + :' Notary Pub lc - Callfotr 411 Co m m. / ��7 fir yA��_ m Ea T rreses Co Oet 28, 2012 ad Signature t L (Seal) • Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Appendix A Conditions of Approval Planning Commission Resolution N/A — See attached documentation Dated N/A — See attached documentation • December 15, 2011 Jilleen Carver From: Joe Castaneda et: Monday, January 30, 2012 3:44 PM Jilleen Carver Subject: FW: RE: Time Warner FYI Joe Castaneda P.E. President :: 951.30-1.9552 .• .. Office :: 951.304.3568 - Fax JLC Engineering & Consulting Inc. 36263 Calle de Lobo • Miurieta, Ca 92562 r:. fsgiieerit 1 C.ais❑ting,toc. From: Sherrie L. Munroe Sent: Monday, January 30, 2012 3:11 PM To: Joe Castaneda Subject: RE: RE: Time Warner ( Rived — no entitlement, as it was an expansion of an existing use. Sherrie Munroe MDMG 951 - 296 -3466 ext. 213 stm@markhamdmg.com From: Joe Castaneda Sent: Monday, January 30, 2012 3:10 PM To: Sherrie L. Munroe Subject: RE: Time Warner Can you send me a copy of the Conditions of Approval? We need to place them in our WQMP. Joe Castaneda P.E. President :: 951.304.9552 - Office :: 951.304.3568 — Fax „LC Engineering & Consu1ing Inc. 36263 Caalle de Lobo Murneta. Ca 92562 Eatiaecriag 1 Cansnitlag,lac. 1 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Appendix B Vicinity Map, WQMP Site Plan, and Receiving Waters Map • December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building Figure 1: Vicinity Map )• December 15, 2011 x y 1 'P , S (: c vr-+ w • - , . ' - , � �� . 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A VIS V r I' ♦ \+o / , J I M•• 'LAN Ftuf t / ` oi '' .1 /J 902.60 Mann HA / _ �•,..: t / I 11 r�' / . � - --• _ _ i" - J ¢ " 'f -, , Came " /i ' f L BROOK w I., , ___- e T Y PAU MA� dh r d ,Ht ._1 •, { i� 2.61 Lancaster Valley HSA ,w , )) / -1 r Nnvnl 1 ( `; 1 tR, ' c _ i _I / '\ •Rir _ t a Ce INDIAN •t i•+ � - - 2.62 Lew NSA • •• ir • ( 2 �� . �J 1 � ill �IaIO k r ■ 1 1 jjj yr I(C/ i- !RESERVATION �P..p rYt Y \ Ij n rpMAH a. 'E F3VAT IJ - 1 _ 6' o . G /' 9 ON � y I I RAI A ♦ f4 I 19 P. 4 "1..• , 1. - • . _ •_ �` r 902.70 Cavo Flacks lu HA Lover Coahuila a HSA NI 1 r _ <,r' 111 I . .O._ J - ` l CLEVELAND N O'151• 1 "",9 7.71 u I �`nl' ` �+ � R X I 1 ti f "'• ic I INDIAN I, >y • r•s o c • fL T.' . er L _ : FORE ` D r: I la Mesa + i aESERVA to ! � ae ti i� � a ... B _ Mt P °p i a, 1 " L I 2.72 A f c. cuan,dla VISA _ 1 l IMNCA51(R 11Y,p4F,i 1 - n htl�._ I 2.73 Anm HSA • / 2. • 1 2 � q I1L p ' ( y\,\ er lr, .✓ 9, . \ " , `.-"1 D:1rN' ` Mau , a,r // \ I r . 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' - "'J � I-'*'- II - IOT A AY S 1-1 SAN IA '�- i N ♦ _ k ; 1 4.t . , r r l :,,,,,,-.7.7..,//: ar va' tw►F ft- M V 1 � , a- , \ 1 - 1 r H era 5 �L`'w� �L w lord b• • IL. / 4 r , �Pee�. "C � 1.,.,..\ '-t.. N O In to / C ill d (,1 JL C � E gineenng & Consulting, Inc. ii E a) PR 10 -0039- TIME WARNER CABLE SERVER BUILDING 36263 CALLE DE LOBO RECEIVING WATERS MAP MURRIE7'A,CA92562 PH. 95 1.304.9552 FAX 951.304.3568 0 VI FIGURE 2 Water Quality Management Plan (WQMP) Time Warner Cable Server Building Figure 3: Site Plan • • December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Appendix C Supporting Detail Related to Hydraulic Conditions of Concern December 15, 2011 Hydrology & Hydaulics Report for Time Warner Server Building 30975 La Serena Way • Temecula, CA 92591 April 1, 2011 MR ENGINEERING GROUP 3621 S. Harbor Blvd., Suite 100 Santa Ana, CA 92704 (657) 622 -2100 950FESSI 9 � #A CC Ela • Nap CM►. l 1c C Mr • PURPOSE The project consists of the construction of a new structure to house Time Warner Cable Server equipment, in the City of Temecula in southwest Riverside County, California. Other improvements include a gravel access road to a gravel parking lot, as well as six outdoor mechanical units. The proposed improvements will add impervious area to the watershed. Using recognized analytical methods and data provided by the county, this report will summarize the existing and proposed runoff conditions. DESCRIPTION OF WATERSHED Being in the City of Temecula, the subject site is located in the Santa Margarita River Basin. The property in question is a 0.68 -acre parcel with one existing 900 sf building, within 13.78 acres of open space. The open space consists of The City of Temecula's Veteran's Park and a 200 foot wide easement to the Metropolitan Water District of Southern California. The site drains east to west and receives a relatively small amount of runoff from the MWD easement to the east. This runoff is collected by an existing drainage swale within and adjacent to the easterly property line, piped to La Serena Way, and outlet through the curb face. The subarea collected by the drainage swale has been defined as existing subarea B (0.38 acres) in this report. Existing subarea A is a 0.31 acre sump containing existing satellite dishes, which in the existing condition has accepted overflow runoff from subarea Existing -B due to blockage of the drainage swale outlet. Existing subarea C sheet flows off the site to the west to La Serena Way. • The proposed structure will be built on fill soils at the approximate location of the existing sump. Proposed subareas B and C will be identical to existing subareas B and C, as they will not be modified. Proposed subareas A and D split the Existing subarea A. Proposed subarea A will drain via a gravel drainage swale and sheet flow off -site to mimic the existing condition. Proposed and D will drain via another gravel drainage swale and outlet to the slightly modified drainage swale with outlet pipe. The outlet pipe will exit through a headwall and sheet flow down to La Serena Way to mimic the existing condition. METHODOLOGY The rational method was utilized to determine peak runoff for both the existing and proposed conditions from the Riverside County Hydrology Manual. . 1 • SUMMARY The table below summarizes the results of this hydrology report: Return Subarea Subarea Subarea Subarea Total Year A B C D Q (cfs) Q (cfs) Q (cfs) Q (cfs) Q (cfs) Existing 10 0.74 0.98 0.67 n/a 2.39 100 1.19 1.45 1.11 n/a Proposed 10 0.33 0.98 0.67 0.34 2.32 100 0.53I' 1.45 1.11 - 0.54. 3.63 BIBLIOGRAPHY The following documents were used in the preparation of this report: Riverside County Hydrology Manual. Riverside County Flood Control and Water Conservation District, April 1978. • • 2 I 1 „- Fl FV =1212 ' �- AREAS AREA PERV. AREA = 0.31 Ades IMP. AREA = 0 00 Ades ' '_ ;', ^�•� �. , s / .. TOTAL AREA = 0.31 Ades 7 ELEV=1201.0 I I ' 01 -119 cfs - .__. IOTALAREA = 0.36 Ades AREA B PERV AREA 0.36 Ades .I 0 074 Us IMP TOT AR 0.00 Ades I O 3� Ac ' AREA C 1 L =72 ELEV = 1210 0 PERV. AREA = 0.61 Acres 01ao =1A5 ds IMP TOTAL AREA =0.00 Ades AREA =0.61 Aces TOTALS I ~ TOTAL PERV. AREA = 1.30 Acres IMP. AREA = 0 00 Ades \ • ... , ,„ , TOTAL AREA = 1.30 Ades AREA C I 0.61 Ac I x 1 A I ® 1 . I ELEV 1 01oo - L71ds € Q I 010 0.87 cfs ° - Ft \ Ni 1 Cr III With 1' - 60' K GROUP VEERING TIME WARNER SERVER BUILDING - EXISTING HYDROLOGY 04/01/10 PAGE 1 OF 1 • • • CLIENT grian B loom Arch:tec }s DESIGNED BY I-C DATE IZ(ro/lo MIt • PROJECT tie Warner- Temecula CHECKED BY MK DATE kt ho 110 ENGINEERING JOB NO. 02o6 °25 SHEET I OF 2 GROIJP Ex ;s #; a , Ry d rol o - Farb ON:LI Melho c0 a Sabareo. A 11 -- ,rjn'inv }es (L= 72 , bH = 19 ) Z (Creel. Ploke- D -4.I ( =: 3•4S lr1kr, 1-rnc= 5.10 .,^ /h Rbno£F Cee `C Fran. St lice pkt.e c - /,s3 5o;[ Group is S. • Fa Pvt.:4'f Curves P( >4e D - S.Z , C- 0.G9 c 1 / - 100 - - O.�s Qr eq. Q O.(oq 3.`s it /kr)(0.31 Acres) 0,. ° 0.7l4 c.c.s 0 4 ,. = c. (5.10 iK /hr)(0.31 .Acres Q)op = 1, /9 cf5 Subarea B M. 5 nraufes (L= 125 DH 229 (Prom Pl a4 e b -4.1 (40eCo) Zie = 3 Lis %w({.r r 'Ir eo "6 5 .10;&4r Rohn -cT Ctegt Ic i e kj c From Salk /fit? . Plate C- 1 53 So: f Group is Q From l(ur *F+ Curves A04f D•S.2 r C', 0.64 c S � Crop �. -7 Q= C(A % = O. VI (3. 38 Ac Oro = O,111 °Ps Q = 0.75 (S ;n4.)(d.3g /acres) G - l •9 $ cf S • / CIJENT Br,a.t Itrek.lec }S DESIGNED BY LG DATE rz-ao /to 1 • PROJECT Tune 1.134'ntr - "Ttnet,.+1t. CHECKED BY MK DATE i 2 /fo(,o ENGINEERING JOB NO. O 2os- - 02 S / SHEET OF 1 2 GROIJP EkIs-Liet) N7c1rolo9y - Olt 4. I Kt that) (Coni 'at S,.Abarea C Calck1a4e T F�/.& Notkart k Plat 1)-3 .. Y ISnin- T from_ PI4-te D -y.l (N d 6) Z,e = 1. 89 i& /hr To - 2.79 m fl.r ?Lino Coe {tc iellL l � ; C l '• rfo, .f' So;6 hap Pl&-Lc f C-I.5.3 So: 1 Group B FratA KJnbc4" CurneS PICLG D -S. l-, O, SO C Q ( o s- , eop Q. CI • Q„ = 0. SS (1. 0(0( 0.(01 Acres) a = 0.47 . cE'S Q,„ = o, (,S (net ;n /ar)(0.6( Acres) Q,oa = 1. / / cFs • ( t Y 3 b � j, _:P � U � f 5'.. � ` Tc' LIMITATIONS: . L �I00 �, Maximum length = I000' Tc I000 90 2. Mazimum oreo = 10 Acres 5 900 80 ? °' Fi 800 7O Y�� aoo 6 �a � o a 300 ` 7Q0 6O ° > 200 7 ..- C p ♦- 0 V . y N °' -` 100 � 4 � � m E c 600 0 5O ° o o so 8 � `e � y E o w 30 �! m �c Zp 9 0 500 � � (�) —° �a °' F m 35 c a� ior"� 10 �E � � � �.�`� ; g � ` K Ai � �� ► 1 � � 400 � 30 Undeveloped �.� � rn Good Co�� ; 2 12 c .,- m m 350 7 25 Undev lo'peC � �•� L ° � Fai�Cover Q � ;s �4 '` � 00 e 20 �`��`'"Undeveloped 0 � _3 ` 2� � �5 m c � 19 � Poor Cover o :2 / I6 5 � q 250 � 17,,,++''s Single Famity 50 d 17 E � � (I/4 Acre? � 18 � L o 14 Commercial 0 U 20 ~ rn �� (Pnv � •' m 200 � 13 � o � � 12 �2� w ° c4. II � `c 25 � �� ° 9 KEY ° o E L-�H Tc-K-�Tc o i= S 30 � EXAMPLE: E 7 ~ {I)L=550�, N=S.O;K=Single Fomily(1/4Ac.) 35 Oevelopment , Tc =12_6 min. 6 100 �2) L=550�, H=SA�, K= Commereial 40 Development , Tc = 9.7 min. 5 4 Reference:8ibliagraphy item No.35. i R C FC a W C D TIME QF CQNCENTRATION i 3�ilANUAi FOR INITIAL SUBAREA PLATE D-3 III 4110 III -_ RAINFALL INTENSITY- INCHES PER HOUR MIRA LOMA MURRIETA - TEMECULA NORCO PALM SPRINGS PERRIS VALLEY XI it 6 RANCHO CALIFORNIA 0 DURATION FREQUENCY DURATION FREQUENCY DURATION FREQUENCY DURATION FREQUENCY DURATION FREQUENCY I 0 MINUTES MINUTES MINUTES MINUTES MINUTES 10 100 10 100 10 100 to loo 10 10o C YEAR YEAR YEAR YEAR YEAR YEAR YEAR YEAR YEAR YEAR 5 2.84 4.48 C n4 3,45 5.10 5 2.77 4.16 5 4.23 6.76 5 2.64 3.78 6 2.58 4.01 6 3.1 - -- i.61 6 2.53 3.79 6 3.80 6.08 6 2.41 3.46 "� 7 2.37 3.75 7 2.87 4.24 i 2.34 3.51 7 3.48 5.56 1 2.24 3.21 8 2.21 3.49 8 2.67 3.94 8 2.19 3.29 8 3.22 5.15 8 2.09 3.01 > 0 9 2.08 3.28 9 2.50 3.69 9 2.07 3.10 9 3.01 4.81 9 1.98 2.84 0 10 1.96 3.10 10 2.36 3.48 10 1.96 2.94 10 2.83 4.52 10 1.88 2.69 11 1.87 2.95 11 2.24 3.30 11 1.87 2.80 II 2.67 4.28 33 1.19 2.57 _ 12 1.78 2.82 12 2.13 3.15 12 1.79 2.68 12 2.54 4.07 12 1.12 2.46 13 1.71 2.70 13 2.04 3.01 13 1.72 2.58 13 2.43 3.88 13 1.65 2.37 14 1.64 2.60 I 1.96 2.89 14 1.66 2.48 14 2.33 3.72 14 1.59 2.29 ,�. - 15 1.58 2.50 f IS 3.89 2,79 15 1.60 2.40 15 2.23 3.58 15 1.54 2.21 16 1.53 2.42 "'1L " 1.0! 1.64 16 1.55 2.32 16 2.15 3.44 16 1.49 2.14 I7 1.48 2.34 17 1.76 2.60 17 1.50 2.25 17 2.08 3.32 17 1.45 2.08 18 1.44 2.27 18 1.71 2.52 18 1.46 2.19 18 2.01 3.22 18 1.41 2.02 19 1.40 2.21 19 1.66 2.45 19 1.42 2.13 19 1.95 3.12 19 1.37 1.97 20 1.36 2.15 20 1.61 2.38 20 1.39 2.08 20 1.89 3.03 20 1.34 1.92 22 1.29 2.04 22 1.53 2.26 22 1.32 1.98 22 1.79 2.86 22 1.28 1.83 24 1.24 1.95 24 1.46 2.15 24 1.26 1.90 24 1.70 2.72 24 1.22 1.75 26 1.18 1.87 26 1.39 2.06 26 1.22 1.82 26 1.62 2.60 26 1.18 1.69 28 1.14 1.80 28 1.34 1.98 28 1.17 1.76 28 1.56 2.49 28 1.13 1.63 30 1.10 1.73 30 1.29 1.90 30 1.13 1.70 30 1.49 2.39 30 1.10 1.57 -- 32 1.06 1.61 32 1.24 1.84 32 1.10 1.64 32 1.44 2.30 32 1.06 1.52 2 34 1.03 1.62 34 1.20 1.78 34 1.06 1.59 34 1.39 2.22 34 1.03 1.48 36 1.00 1.57 36 1.17 1.72 36 1.03 1.55 36 1.34 2.15 36 1.00 1.44 rn 38 .97 1.53 38 1.13 1 38 1.01 1.51 38 1.30 2.09 38 .98 1.40 C z 40 .94 1.49 40 1.10 1.62 40 .98 1.47 40 1.27 2.02 40 .95 1.37 j co w 45 .89 1.40 45 1.03 1.52 45 .92 1.39 45 1.18 1.89 45 .90 1.29 71 ..i 50 .84 1.32 50 .97 1.44 50 .88 1.31 50 1.11 1.78 50 .85 1.22 55 .80 1.26 55 .92 1.36 55 ,64 1.25 55 1.05 1.68 55 .81 1.47 rn to I "‹ Z 60 .76 1.20 60 .88 1.30 69 .80 1.20 60 1.00 1.60 60 .78 1.12 65 .73 1.15 65 .64 1.24 65 .77 1.15 65 .95 1.53 65 .75 1.08 r r 0 D 70 .70 1.11 70 .81 1.19 70 .74 1.11 70 .91 1.46 TO .72 1.04 > 0 C „'p 75 .68 1.07 75 .78 1.15 75 .12 1.07 75 .88 1.41 75 .70 1.00 m D 73 p 80 .65 1.03 80 .75 1.11 80 .69 1.04 80 .85 1.35 80 .68 .97 A > 85 .63 1.00 85 .73 1.07 85 .67 1.01 85 .82 1.31 85 .66 .94 v I A 0 SLOPE c .530 SLOPE n .550 SLOPE + .500 SLOPE _ .580 SLOPE a .490 Z O 07 Sc 3•s1 ,�. 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' , ��, ' _.....� , o . � . ��, ��, � � ° $, , i � �-o �� i N � � - u.: iu ' . � .. .� `• 'N r i.• , ' ..• ' . .. .i � � '_ . . , . ._ < .v '� . . m i �:. m � ,� �. . , , , � , _,. � _. .0 - _-_, , _ �,. � , N r �.. ` t. ✓Y ... n..n 3 �� Z 4. \ r � �h iy" ��f �� rv�. ,^ �i i � V/ � h m :; s < ' m � p9p0 p9p p9p pyp 0~919i1D . c ��y �� v � �, �� , ,� „ �� „� �� „ �� „ �� , o00 0 00 000 oao � �"''nm m'o8i - m �O g� m�nm � �� 0 � 0 � m v x < v� • � � o _gz�— m A O � O o � � • CLIENT Brian �JIOOM Arek,tec *s DESIGNED BY LC DATE y /// (I MK PROJECT Ti Warner - Tenecutc. CHECKED BY Ml DATE //) ENGINEERING JOB NO. 02°5 -025 SHEET OF Z- GROUP Qr°n°cr _ t._kydrt R &t ,onat. aka et Subareo. A (alcula {e T� {ion No. o,r�Plti Pate �-3 Tc= F3 K',h_ I Cro Plafe D -`t -1 Cye� � ) � ,a 2.61 !, inc 3,91( " cLMO1 Coe fTrt/eK .... Front Soils MAP C- 1. T3 S'6:1. ',:f Group Q from g.rno CurvrV Plate a -5.2 ■ , e O.s C , 0 0 . 0, ac C/A c0 0.69(2,6.7' "llr )( 0 ; 0, 33 c -Ps :.' Q,„„ 0.75 ( 319 '^/kr)(0.1t "Ac) : -_ - Q ,00 0• S3•; c s • Subo_re&s B G (AO dilate F a sEik5 CondrY Q, 0,t6 t-e '(°o = 1.45 cs C _ Q 0•. c-Fs Qioo = 1.111 cFs • • CUENT Brian f3loory Arcll r4ect5 DESIGNED BY LC DATE y /// MK PROJECTTiMe Watnei"-'TeMecuJr- CHECKED BY M k DATE HI, /!I ENGINEERING JOB NO. 02 °C -o 7-5 SHEET 2- OF 2 GROUP Subarea D Calcw(at c T {}ort Motto, n k P(o_Ec D -3 Tc 1 11;11. I -nom P(Qi e D ( '(y a� G) '' �,4 = 2 87 In /k r I� o = `'(• 21-/ A r iunofC Coe ociebl"t C I. Fro' Soils kc. C - l.§.3 S G ro a Front Q.+rof{ C' Plate- . b -52 ,- C „ '= 0.75 , C 0.80 Q= ciA 0.0 ' 0:75(2.87 m hr l )( D.lb Rc) Qia _ 6,3Y cfs Q1- 0.60 ( V Zy'R�r ( (4 Ac) 6 C 0 .5`ii efs • �{t.=`:rl��'t.:.��s r.7: _. Tc' �IMITATIONS: � 100 I. Maximum lengih = 1000� TC IOOp 90 2, Maximum area = 10 Acres 5 900 8� a °� H 800 70 Y �� aoo 6 a a o 0 300 sf 700 6O �` 0 200 7 ., 0 01 • / � a�. N E •� t00 �, -;r' a 600 0 50 c Q o 50 v �,,F �� a D d a� m 40 �'�` °' > v E o v 3O t..`:.><"> r� °' 50a � d �� d zo �;� � f �` 9 a � � . � � � � ° t ! T �0 y 3.5 � 6�. N 8 � f" � �� E I m a # 6 .,''�� :�f � �p . � "' K AI a .�� `�� 400 �, 3Q Uadeveloped � 2 `�� , 12 c — Gaod Cover �.�, � v a ro 350 � 25 Undevelaped �� a�� o ° � Foir Cover" ,g 14 �.. �E � � 300 Undevel p d ,'�� Zl 15 d 'c_ .5 � Pqai Cover �� o . z � 1 6. c'• . o -� 18 �'� ,.Single Fomily`" � 17 E J 250 �- f6 f�'' tl/4 Acie) 50 m Ig = ``� 19 L o 15 '' Commercial 0 F �. �o �4� �, ; ,iPav � zo -- f3 �'/�, � c � 200 � � � �' b n' 12 � `a w .�°c �21/� '� � �'"n c I I �' � � 25 u p• � � � � KEY U 150 � 9,� �»}�I Tc—K—Tc o i= f 30 � EXAMPLE: E F 7 (11 L=550�, H=5.0; K=Single Family{I/4 Ac.) 35 Development , TC = f 2.6 min. 6 � (2) 1.=550�, H=5.0�, K= Commereial 40 Development , Tc = 9.7 inin. 5 4 Reference: Bibiiography item No, 35. • R C FG a W C � TIME OF CONCENTRATION i o�Y �iIANUAL FOR INITIAL SUBAREA PLATE D-3 `;' i .- d, t� � . Tc' LIMITATIONS: L !00 i, Moximum length =1000� TC 1000 90 2. Maximum area = 10 Acres 5 900 80 a 01 Fi 900 7� Y" o aoo s a �- � :•' 30p a' 700 6O �> 0 200 7 .�-� d c . N °� •" I00 a °i E c 600 0 50 ° `o o SO 8 ° ar y or 46 '�`�, a a'� E o a 3O tk 9 0 5p0 a � � � a 20 - �..—.� (�) .° d � � �o -� �� -'' w „ 35 ` �� - �,o � d e l^' E w "' K A i� s �/ I I � � 400 � 3Q undeveloped 0 ,. 1 w Good Cover Z �2 � � m 350 = 25 Undeveloped � . ° � Foir Cover ;6 i4 '` � 300 E Undevel ped ~ .3 Z 15 d • c -� 9 Poo! vM � o .2 /� 16 � � 250 t 17 Si e Family > �/ 17 E (I/4 Ac 5O m 18 � v `" f 6 , •- e� L o 15 ' Com rcial O 19 ° a, '•- 14 (P v � 20 ~ m 200 � 13 � � � o �' � Q o c ,r �-� 25 � �5fl ° l KEY $ � 9 L�-H 1b-K-Tc o i= 8 30 m EXAMPLE: E 7 F- +/ (I)L=550�, H=S.O;K=Single Family(I/4Ac.) 35 Development , Te = 12_6 min. 100 � �2) L=550�, H=5.0�, K= Commercial 40 Oevelopment , Tc = 9.7 inin. 5 4 Reference: Bibliography item No. 35. ''• R C FC 8a W C D TIME OF CONGENTRATION }'�YDROL�JCyY ��ilA�IUAl. FOR INITIAL SUBAREA PLATE D-3 ' 6 m d�-� O n O r P a 0 N♦ N� N a� � N m O C r P N r N m d O h♦ T G Q F a N O m �� K� N N H O O P P 9 F O O W N Q� 4 n N N�� O O O P P V O W • 2 �> m� m n N N N N N N N N N N� r r�� y�� ti� �+�� ti ti W o > J Q' • W O ..r..r.n..� .r..�.n�.r w..�.��.. .n.nr.n • J W C A�+�tPO IDTNNP JpNti1� f9Nm1'1 �O�'100 NOIff�O VfN060 J Q OQ NfNOP Q1�1�NN II�li11'1 I�INN��"� OOOP PP00h l.I�I��pO l 4 r Y • � � • • � • • • > NNNN�n 11 • • � � � • • • • � • • � � � • ♦ � • N Q ¢ Ow O W fl�' J�NI�00� ^+Nf"IO N�pI�WP ON�iO ONdJm eNOY{O NeNeN N 6 <J ..r.n..�r ...n.n...'..n NNNNN A11nt'1�'11'1 �IfV1Y1�0 �01�1�bm C2 �2 4� = G�O�JY1�+ NmhbN �OdNNN 1'1�ONOP PONVIP NPt0m0 1�1�pr+N�+ Y Ol hOU1•'�0 1(INOmh 1/141�IN�+ 60Md♦� O1PIN^O 001�0�0 1{IfI'AI�I O U YW ....• .•... •.�.. •...• .��. . �.�.. ............ 2 �OtlN✓�♦ ♦rfNl�'1 ��/�1�� 'INNNM NNNNN Nr � Y N �J 0 J_ Z W 2 1'I�OmN�. rinVi'frl 1'eNmrN PNON�O PJP�O hrO.�U�e Y1.+mNN N 6 06 N0�N0 m�pl(Idl'1 NNOOP 61`I��ON ♦�1�11�1M Nry.N00 P?mm(O a � ..w ..... 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Pm1�hb dYf�1�1T Nti � J� 2�> N • nI�IPIwIN MNN1��N NNNN.+ - J 2 W O� rl �..� �+ r .. � .+ �n �. .� �n ...0 �r r o . u a � u� W O Q LLf J �^ W 6 NNI�I`IO NiI1��0 pN�0�+0 tiA1NA0 P�OPI�f OPII�Nm 0�01(�RI Q Of �I .Iy�pyi I�IN�+OP 00Fri �01l11 I�1 NNN� OPPO mm�- :n J 1�. �+ W • } •:. • • . • • 6 T 1'11�PNN�N NNNN� ��in�n rrnnr.rw� �.r�..rwn.n r�n 11 � �u �; � a o z � ` . . . . . . . . . . . . . . . a w : ov� � 4 0 U W �2 Ff J1d1�iDP pnwNl�♦ ylyhOP ON�NfO. ON�I�Om o�N�G11�0 N01I10N N Z C4 YJ � .+��+r..� ��r.n NNNNN Trle'ITM ♦�tltl(�.O dnnmm 7 a J � Q I .i O Z � �4' 4. 6' mhJlNm 01(INGO ONJh.+ N�IYIf�O nPNI�A1 PONOO Nrh1�l0 > O< fO�fN .+P01�� NI�'INN .�GPOm f�OJY1N OA�'INN .n�00 U O W Z� O�t�lllf�l mNNNN ryNNNN NN�+�+� �+�+�ti ��+ti.-rH �u.y�r.+ W J M b in < W C rW��+Q! Ll�m.�♦ mnllps0 �P�m♦ C�nlOh ♦PJV�O 1�lemNm S 6 O< fbl(II�INO Pmhn�p NN�1♦ NN��+ �"�OppP Pmmml� 1�:yy�p O 4, r W • � � � • • � . • J } NNNNN ...+.n.n.� .r.w.n�� ..�.n.y.+r ..1�.�.. tl . � � � • . � � . • � • • • • � � • • � W ¢ z a O N O Z �+ W J `� N�Dh61P 0�+��♦ Yf.OhmP GN7.D0 ONr�00 ON9N0 VIONON Yi K S � r .r .� ti.n .w y..� N N N N N AI i�l 1�1 �'1 1�1 O O N YI �4 �O 1� 1� m O J �-r O S ,• R C� C& tlV C D STANDARD T�Y�RrJLrJGY )��ANUAi INTENSITY-DURATION CURVES DATA PLATE D-4.1 (4 of 6) 1.0 I 2 3 4 5 6 I. li mmisrammmammemmummossamme wpm mum mamma mommummum Immemmumommummumninsimmomplimmisummentommommummommmemm Ha ■mn:::■�p �sanaaaiir u ■■ ■ ' N1L 'S7/u °�:nra■a■lian■N■a■■■■Hlll fl fam■■a■a mmumin N■■■ om=ammum•wR.mmini /o_:.ana■.wmw" om iaHaaaaagi■aaa ■H man Wa■ ami... ■!ST�{as11/ �a.flu. :a..f.i.uuuu.Sfl -- •a•. =•■Waal N i a//■aa■w.t li�'."..r. 71 a_Si.flaan w' z:maaan aa aRaa•al .Ir roOM .I.Wa:N.. ..V_;ri..a u■aaao!�E ig ■ W mermarmi IIIa aV_S ina /faua/�!_.ra■u. /am_arIIH■ W aa■■■a■■aaaal • O mmpwri ". w 1joll.a■N411p/m"aauo/!'S.a uummum aN/•aa aHnaN .I mina/►" i va mmit l_ rsoadU aa7S91ja% .lCNWR_Srff■Nnaaa/me':.raH•Nau■ a aaaL. NAaa Ku1Jr• ila •Wa1,11LW..1....1∎Wra0•a.anaa•V ='ter !Sa llMel -, 0:15 mar.• ap' la /lweatem araie �a�C. warillHn a■Na/C�af.nu: :RCi luau nsinin wC:fl�saC■rdnanWWawn u•auau /_an•WHs•■■asWUWN I./ /■a■,A■•.uPua l.ao�c■•al /!ae•..•■t■■■■■■a■■.•a■anaal . IIMI •nIOl r� aaN.raou■li►�.nu .Nn.■a..nua■.•1 Wi" nPK n % ? Y am■.■l7■/5r• •MI n Wi . • C,,,: G.( „' wat.l asspi 7.Mtl r a n n.a lI fl flni inn u • ' arl NIMI asnn HaKV aaaar .4ta #m ■aNVmlIH.HHmmNNH•a ■naWaN nN.•Wfa►•NGflV/a•n•S:]7gp •�./Zrnnatiaamamnnnaa■• n.�B■n:W v.N•In • ■u■.WnWH ■■an ■an a AINaarla F.W III Aaa. ■■I1N■ ■.am• . :I usn An's sn i■a ! sa:::aunnnuaIansn.nma•auu•snnn W Q WI.aNSKIME fl IMM am IIp ■ .W..NII• ..au••a. ana H•mN z unuWa..Y./•.� 'iR n..R %ai:H®■:•n.•WI1u :■•a aan•ua.um•a■ /.■a ■ ..■ • :a■gaam u■. a a aa■a■aaa :■■m■ E :r • ' u . n a ■ nII :■ 'n. u sWW. 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MM�U1• Iuaun uuuurri.nan a■11N11a..■Hn■W W. nn nh ln. a.W..1111I.■■■■ma..nn■.a■■ ■W ■ ■■■.n .rl••rin.Nn..um.N ■■..Ilan fa•�1 MI .1 :Ann mono E111•. ..•uuun a Ya■ ::11 R C F C S W C D • :: IIRMIXEMEmmUMMININUMUMMMENNEMUNIUMMUSUMMEML NM ■aurunnunnaaaa■ aa.a.al].nnann.•nh HYDROL MANUAL II I ..nn..nun . I la I •/ fla■11n■Nnnn■ . :nli•...nm :a:I - - Nu,Nmnno.m.■HNa.uma RU `OFF COEFFICIENT CURVES ..uuWmn■aum.■N•■. MN as�I SOIL GROUP -B aallanamnna mnnn NN nnm mmam -■ nu ■ 1: mano n.a nnu.■■nn�aWHW ■ : .m. � A ER TYPE LANDSCAPING :annum a tasson■■oamia a p II Oflmamn n ■■. u 8 nnm■. pqN■ N :anW aIN :W ■ RUNOFF INDEX NUMBER 56) a/aaa■mIN q aaaalIMN . auN a H Ifun■■.mm�..u•a.aan a : ■ aaal � H■m aa aaam nmW m •NnNaa•■m■ a 1 WIN W RAINFALL INT: NSITY IN 10 NmNaa t ,• lit . 0 0 :.,, � :, 2 � � l 3 ip! .i Iii,i iIli, ,I , r .�;, 4 5 6 . , V PLATE D -5.2 cs C/ .i: li - } I) 0 I 2 3 4 5 6 • M MM d M MM ..■■ _. • n.. 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E •w� a an./.nrr� •aaalnau■nN n n u no N► 1■■► m/ ir■/ D.•.%■ NmnlNL3r ■■■■m■■■rrul■■■■■M■■■■■■Mrrr ■■rr■ ' 0 5NUU ■■ + araur•MM/r■nammin a M■rrrruni■urr / I/ M I■ f 1M47.MMrsr.Nrr■nnnML9rM.MMMrrnr NMMM.rrMrrr.. ■ ■rM ■MMrrr. • vl .r!I■u • n a a z Jalnrunr■M.L u l l.aa ■■r■■tt ■■rrr■■■N■ ■■■ t- itM/ttrrnainwaiansMrmrMrrLl /roar r/rrrrlumni inins mmen z . 5 • ..rnM /IIMME IIII Mr►.rM .MMrMllrrrMr■rM/rr.t/MrnMMMMr. USI rrrrrm I MU■Mr.■/�;J//rr /UI nallMM•LIrrr Noah■ IIII MrNrrNrruuuN w Nu.MWAIMIM /,M■■M■.MuMr V NII.m ■tlmMr /.. ■■■MU (j MIMEMM /MMtiOMn MM ID • • • e uurrNr/ /rilM.v�mr.MmNM■Nr L ■ r■Mr.mr {y ii■u l� u uiin li iiiiii MIIMMM■r■■ w ■UMMMVI IIIW Ai ■.r■ ■■■■■r ■NrNL!■nu.r■m■Mlil■r i ■ ■r■■m■■rr■■r■r w MIMMM�InrIMMMM ■rr.M■rrrr��rr L; rurrrrrmIIMFlr .iuMi. ■rrrrurrMMMM/ O • - N ii q\t lM ir M M MIMM M EM i i ei M IMU M s V • I / 4 m�ur /.u.MMrr.ur ■■M /rMMMMMrM MnnrunrrNinu■ ' liaL 'jlM lttiYi�lfiltiiari du 11 ■■r■ui■MM.M � ■r mn.nr'IM•M rrr /.�M■■ntarnMmM/r/rrMMr uMM■rM■M rrr/rrrMrr Mrwl uf.■nrrnMM.rrM MrMMMt+ / ■mm ■■r■■uM■r.N■■rm■ ■■■■r■■rn■N /MllfUUMMMMMNmMmr■■Mt aaa fln■MUrrt�M ■Mm.MMMr ■ ■.M..rn.r .°:..:... 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L tob PLATE D -5.2 • CLIENT gran BImM 1lrtM,-4ecAs DESIGNED BY 1 - c DATE 1 II IL PROJECT T,Me Wafter - TeMefl R CHECKED BY M.k DATE 9 / 1 /II ENGINEERING JOB NO. oz °S -01S SHEET OF GROUP Pipe ! Hydro..u.tc-s Fror.1/4 vIyaroloy t at . Q c . s S�6aleq B -t v.barea. .b To341 Q = JJ f 0,99 cfs 1- 0,314 cars 10 0 = 1.32 cf s use Mknnitn's -cor . S ' AVM p;fe captcr€y 1.91 Zis f= 5 !1 = 0.0o/ (PVC) • S, = 14 S . 0,01 , y lC ( 11y'y3 .o, % /•Y9 ) J 00 (Tr ,33 > 22rr 33 0= 1,70 cf's > 1,32 cf5 6K ✓ Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Appendix D Educational Materials 0 • December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building EMPLOYEE EDUCATION LOG Name Name Date WQMP Materials Provided (Printed) (Signature) (Mo /Da/Yr) • • December 15, 2011 /N{W L ns "Y pwaB q .,.: •: ,. .`.,, -.. +...w�.i A}IdM PWd,��CO'MWT 'ra ..., c Z00 - ££8 i iiiiiii oy tn s uaz c XiCYA1 NY3•D ugpelo"d 30 W3A ELI. ...2'''' sdu /no`2- eda•MMM JJleMwJojs /sapdu /Ao3•eda•MMM 4 ` 2ISIA JO • • • :pe;uOD uoueWJO}u! aJOw 10i -; WJO J , .. siymmil 't, SNroL11N3 � i` rge effects fects a po utlon bat is stormwater 1 0 1? . Polluted stormwater runoff can have many adverse effects on plants, fish, Jr.. Stormwater runoff occurs when precipitation animals, and people. liatioutt ., r, from rain or snowmelt flows over the ground. • Sediment can cloud the water 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 destroy aquatic habitats.r • Excess nutrients can cause a t� algae blooms. When algae die, - - �' • " • ".i 3 IS s t a ' .. ' the sink to the bottom and decompose ' - '" �:. . i � � • - .. - ; ice -•• --� - � in a process that removes oxygen from - ‘ °•�:` the water. Fish and other aquatic u No /nm ? organisms can't exist in water with low /' +� l Li dissolved oxygen levels. / 1 w • Bacteria and other pathogens can wash into swimming areas and create health -i _, ,, , - hazards, often making beach closures ' - - - - necessary. iii. • Debris — plastic bags, six -pack rings, bottles, and a _, . cigarette butts — washed into waterbodies can choke, suffocate, or at ,. disable aquatic life like ducks, fish, turtles, and birds. - 4 ''r r • Household hazardous wastes like insecticides, pesticides, paint, I y am` r . solvents, used motor oil, and other auto fluids can poison aquatic life. . " Land animals and people can become sick or die from eating diseased � ..E. " = .,." 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 drinking water . sources. 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 f z . - - `' increase drinking water the waterbodies we use for swimming, fishing, and providing _.._ ' ` treatment costs. drinking water. -+...„ • 0 . , . . „.....r, ..,....,.....,.„... .: starniwatan So(u . ._ f ., .:.:. , i .. 8S1(�G'Yjt1G�l a Auto care o Washing your car and L. . - - degreasing auto parts at home r4 , Ed ea ttic u ed6e iat ra ehaxgal peop behtz& o�c. . -- — , can send detergents and other . g SigK6 can rwalrka i Kean 6isvug dxai u w e& taideaae contaminants through the That i c�tai wilt be caxaied storm sewer system. Dumping . o gil p -,, ,, 0 ,/.`�� automotive fluids into storm +tea watered ii r a watahbodg. pap "`4b p drains has the same result as C o u t u i w c l o r i c a 4 4wik al a e 4 pa p at dumping the materials directly into a waterbody. (��/� eoliat&' ate creed `" oli ad o aura tude' • Use a commercial car wash that treats or aide C I t :1 Dow tpowt tie" 04 1z gwwcd of &t• AI" d1•aim. 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 • Repair leaks and dispose of used auto fluids divert unwanted water. Permeable pavement Excess fertilizers 1 and batteries at designated drop -off or systems allow rain and snowmelt to soak through, and pesticides recycling locations. decreasing stormwater runoff. applied to lawns Rain Barrels —You can and gardens wash collect rainwater from off and pollute Is Septic P waste rooftops in mosquito _ streams. In systems proof containers. The addition, yard y Pet waste can be I clippings and Leaking a major source of . water can be used later on Y k} t g and lawn or garden areas. leaves can wash poorly bacteria and = - - - �, into storm drains and contribute maintained 4111 ,, . excess nutrients • , • Rain Gardens and nutrients and organic matter to streams. septic - '' ° ' y in local waters. Grassy Swales Specially • Don't overwater your lawn. Consider systems release nutrients and • When walking -- designed areas planted pathogens (bacteria and our pet, with native plants can provide natural places for using a soaker hose instead of a viruses) that can be picked up remember to pick up the rainwater to collect sprinkler. by stormwater and discharged waste and dispo of t it and ro soak into the • Use pesticides and fertilizers into nearby waterbodies. ly. When use is necessary, use Pathogens can cause public w roperly. Flushing pet ground. Rain from sparingly. ry h bl waste is the best disposal 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 concems. on the ground increases into these areas rather pest control methods whenever • Inspect your system every public health risks by than into storm drains. possible. 3 years and pump your allowing harmful bacteria • 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 stone 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. 1 t ��,' ., - A i Dirt, oil, and debris that collect in Erosion controls that aren't maintained can cause ,41 ' .. r , parking lots and paved areas can be excessive amounts of sediment and debris to be � n 1 ' , k . • - A T washed into the storm sewer system carried into the stormwater system. Construction _ -KI • f ' I "' . and eventually enter local vehicles can leak fuel, oil, and other harmful fluids _ c waterbodies. that can be picked up by stormwater and • Sweep up litter and debris from deposited into local waterbodies. �, sidewalks, driveways and parking lots, • Divert stormwater away from disturbed or .. x • Cammercla` especially around storm drains. exposed areas of the construction site. - " • Cover grease storage and dumpsters • Install silt fences, vehicle mud removal areas, I _ j 1 and keep them clean to avoid leaks. vegetative cover, and other sediment and ' • Report any chemical spill to the local erosion controls and properly maintain them, . - especially after rainstorms. I hazardous waste cleanup team. They'll know the best way to keep • Prevent soil erosion by minimizing disturbed spills from harming the environment. areas during construction projects, and seed and mulch bare areas as soon as possible. Cons'tr�uct 71, r cu[ture Lack of vegetation on streambanks can lead to erosion. Overgrazed pastures can also AtdOn 0 Ve contribute excessive amounts of sediment to local waterbodies. Excess fertilizers and ` pesticides can poison aquatic animals and lead to destructive algae blooms. Livestock in � �tC1 / tf1 eS� :.; '` 1 • streams can contaminate waterways with bacteria, making them unsafe for human co ntact. �1 i • Keep livestock away from streambanks and provide them a water source away from waterbodies. _ • Store and apply manure away from waterbodies and in T ~_ - -- ,�, �.,_; accordance with a nutrient management plan. l • , .1,4,4 —i� t�' "3 - • Vegetate riparian areas along waterways. • J ' • Rotate animal grazing to prevent soil erosion in fields. — , . :0(•:. • Apply fertilizers and pesticides according to label -,� instructions to save money and minimize pollution. r ery "` • Uncovered fueling stations allow spills to be 'Pitt'. : washed into storm drains. Cars waiting to be •r' repaired can leak fuel, oil, and other harmful or �, , . Improperly managed logging operations can result in erosion and fluids that can be picked up by stormwater. ' . / ''J sedimentation. • Clean up spills immediately and properly ah. Y - - • Conduct preharvest planning to prevent erosion and lower costs. dispose of cleanup materials. 'Y .' ' • , _ • Use logging methods and equipment that minimize soil disturbance. • Provide cover over fueling stations and • - design or retrofit facilities for spill :4 ' °'� • Plan and design skid trails, yard areas, and truck access roads to *, , minimize stream crossings and avoid disturbing the forest floor. containment. t �f -- g g fleet vehicles to prevent a!i, r- • Properly maintain - • Construct stream crossings so that they minimize erosion and physical oil, gas, and other discharges from being & r a-� .+ - _ changes to streams. washed into local waterbodies. "` • Expedite revegetation of cleared areas. • Install and maintain oil/water separators. iim w illallit • III 0 • ForlNtormation: DID You KNOW , , . StormWater Pollution ... What you should know For more information on the General Industrial Riverside County has two drainage systems - sanitary sewers and storm drains. Storm Water Permit contact: YOUR FACILITY MAY The storm drain system is designed to help prevent flooding by carrying excess State Water Resources Control Board (SWRCB) rainwater away from streets. Since the storm drain system does not provide for (916) 657 -1146 or www.swrcb.ca.gov/ or, at your NEED A STORM WATER water treatment, it also serves the r' Regional Water Quality Control Board (RWQCB). unintended function of transporting PERMIT? pollutants directly to our waterways '7 / , .. / %/ �' Santa Ana Region (8) � , California Tower • 3737 Main Street, Ste. 500 Unlike sanhtaiy sewers, storm 7 / \ ,,, , Riverside, CA 92501 -3339 (909) 782 -4130 drains are not connected to a • 111 d; -N ' ' , treatment plant - they flow directly i San Diego Region (9) to our local streams, rivers and ! - 7!- - ! •\ 9771 Clairemont Mesa Blvd., Ste. A -- , ; % , -4 ° San Diego, CA 92124 lakes. (619) 467 -2952 1/1111111 1; ■■■■■■■ 111111 1111111 ••• 111 ■11■1■ In recent years, awareness of the need Colorado River Basin Region (7) ■■ ■ ■■ ■ ■ ■ ■■ ■ . ■ ■ ■■ • • ■ • ula In 73 -720 Fred Waring Dr.. Ste. 100 ■ i i ■■ ■ .... ■ ■ um 73-720 '■ s ■■ ■ ■ to protect water quality has increased. Palm Desert, CA 92260 iii i i iii :: ■aaci ■■■■l■ / °" 0 (760) 346 -7491 ;; U U ; is �� .. ■ • • A s a result, federal, state, and local have been established to °.,z A! :. , reduce polluted stormwater discharges to -' O Wi. 1 , ' ;,; t �� 4 � our waterways. The emphasis of these , i � .. SPILL RESPONSE AGENCY: J , f HAZ -MAT: (909) 358 -5055 �� programs is to prevent stormwater �'l� q HAZARDOUS WASTE DISPOSAL: (909) 358 -5055 - , pollution since it's much easier, and less ;_- � ;al." --�. • - ` RECYCLING INFORMATION: 1 -800 -366 -SAVE -� = I i costly, than cleaning up "after the fact." tom: :r -_� To REPORT ILLEGAL DUMPING OR A CLOGGED - �' ° )o STORM DRAIN: 1 -800- 506 -2555 To order additional brochures or to obtain information on other pollution prevention activities, call: Many industrial facilities ilities ' ; 1'1( ; ._,p Discharge Elimination System NPDES (909) 955 -1111. and manufacturing operations must obtain coverage under the St orm Water Industrial Activities Storm Water In 1987, the Federal Clean Water Act was amended to establish a framework for . . General Permit regulating industrial stormwater discharges under the NPDES permit program. In N PDES California, permits by are issued b the State Water Resources Control Board 1 �� i - � PROTECTION PROGRAM (SWRCB) and the nine (9) Regional Water Quality Control Boards (RWQCB). In FIND OUT general, certain industrial facilities and manufacturing operations must obtain Riverside County gratefully acknowledges the State IF YOUR FACILITY coverage under the Industrial Activities Storm Water General Permit if the type of • Water Quality Control Board and the American Public MUST OBTAIN A PERMIT facilities or operations falls into one of the several categories described in this Works Association, Storm Water Quality Task Force for brochure. the information provided in this brochure. • What are the requirements of the How Do I Know if I Need A Permit. 7 Industrial Activities Storm Water General Permit? Following are general descriptions of the 4 Landfills, land application sites and open The basic requirements of the Permit are: industry categories types that are regulated by the dumps that receive or have received any industrial Industrial Activities Storm Water General Permit. waste; unless there is a new overlying land use 1. The facility must eliminate any non - stormwater discharges or obtain a separate permit for such Contact your local Region Water Quality Control such as a golf course, park, etc., and there is no discharges. Board to determine if your facility /operation discharge associated with the landfill; requires coverage under the Permit. 2. The facility must develop and implement a Storm Water Pollution Prevention Plan (SWPPP). The Facilities such as cement manufacturing; '4 Facilities involved in the recycling of SWPPP must identify sources of pollutants that may be exposed to stormwater. Once the sources of 4 feedlots; fertilizer manufacturing; petroleum materials, including metal scrap yards, battery pollutants have been identified, the facility operator must develop and implement Best Management refining; phosphate manufacturing; steam electric reclaimers, salvage yards, and automobile Practices (BMPs) to minimize or prevent polluted runoff. power generation; coal mining; mineral mining junkyards; and processing; ore mining and dressing; and Guidance in preparing a SWPPP is available from a document prepared by the California Storm Water asphalt emulsion; 4 Steam electric power generating facilities, Quality Task Force called the California Storm Water Best Management Practice Handbook. facilities that generate steam for electric power by 4 Facilities classified as lumber and wood combustion; 3. The facility must develop and implement a Monitoring Program that includes conducting visual products (except wood kitchen cabinets); pulp, observations and collecting samples of the facility's storm water discharges associated with industrial paper, and paperboard mills; chemical producers ..0 Transportation facilities that have vehicle activity. The General Permit requires that the analysis be conducted by a laboratory that is certified by the • (except some pharmaceutical and biological maintenance shops, fueling facilities, equipment State of California. products); petroleum and coal products; leather cleaning operations, or airport deicing operations. production and products; stone, clay and glass This includes school bus maintenance facilities 4. The facility must submit to the Regional Board, every July 1, an annual report that includes the results of products; primary metal industries; fabricated operated by a school district; its monitoring program. structural metal; ship and boat building and repairing; -> Sewage treatment facilities;*° ♦ Active or inactive mining operations and oil and gas exploration, production, processing, or -> Facilities that have areas where material A Non - Storm Water Discharge is any A BMP is a technique, process, activity, treatment operations; handling equipment or activities, raw materials, discharge to a storm drain system that is not or structure used to reduce the pollutant content of intermediate products, final products, waste composed entirely of storm water. The following a storm water discharge. BMPs may include 4 Hazardous waste treatment, storage, or materials, by- products, or industrial machinery non -storm water discharges are authorized by the simple, non - structural methods such as good disposal facilities; are exposed to storm water. General Permit: fire hydrant flushing; g; potable housekeeping, staff training and preventive water sources, including potable water related to maintenance. Additionally, BMPs may include ' - the operation, maintenance, or testing of potable structural modifications such as the installation of water systems; drinking fountain water; berms, canopies or treatment control (e.g. setting atmospheric condensates including refrigeration, basins, oil /water separators, etc.) How do i obtain coverage under the air conditioning, and compressor condensate; gist Industrial Activities Storm Water General Permit? irrigation drainage; landscape watering; springs; .... non - contaminated ground water; foundation or _- ' ' - - ... Obtain a permit application package from your local Regional Water Quality Control Board listed on the back footing drainage; and sea water infiltration where = _ _ : _ _ _ _ of this brochure or the State Water Resources Control Board (SWRCB). Submit a completed Notice of Intent the sea waters are discharged back into the sea - -- — (NOI) form, site map and the appropriate fee ($250 or $500) to the SWRCB. Facilities must submit an NOI water source. ' thirty (30) days prior to beginning operation. Once you submit the NOI, the State Board will send you a letter • acknowledging receipt of your NOl and will assign your facility a waste discharge identification number (WDID No.). You will also receive an annual fee billing. These billings should roughly coincide with the date the State WARNING: There are significant penalties for non - compliance: a minimum fine of $5,000 for failing to obtain permit Board processed your original NOI submittal. coverage, and, up to $10,000 per day, per violation plus $10 per gallon of discharge in excess of 1,000 gallons. • 0 • • •seekoldwe JO saotoeatuoogns anoi ICq pasneo a6ewep leluawuoalnue C•■ Aue ao} alglsuodsai /lleloueug play aq i(ew noA `ails uogonisuoo e Jo aoslnaadns Jo JoteJedo . , • ,-- `JOUMo ue sv •sAennaa}eM JO wats,s uleap awls ayi `slaaals aglow! sluelnllod pue tuawlpas _ - ,'i$ �- '• Ail to e6Jeyoslp ayl ilgigoad Altolats suogelnbeJ wool pue awls `leaapa3 ayl :310N 3Sb31d i 7/► 40. 7 143 sla a u ol onalsuoo ue `sa lot sad ` an s ri e of an `s ueau n / ^ - � q p l pue P l 'Ian; 'sprig I y l q I ! .PdP ; , `sluanios `lined `ae}aow `ataaauoo `tuawlpas 6ululeluoa salts uogonatsuoa woal se6aeyoslp . v... i i `'7 - sapnlaul slyl •aaleM aaelms wool JO walsAs uleap awls ayl ow! slue}nllod to a6aeyoslp • ► ail pgigoad lest loaiuoa a6aeyaslp pue luewa6euew aaleMWJO1S aol seoueulpao paldope k anal aplsaan!H Jo /luno0 pue sago al l `Mel awls pue leaapal algeolldde g4IM eouepa000e ul )_____,. j • uollnllod aateMwao }s }uanaad of asn ueo saowaado alts y uogonatsuoa leis (sdW9) seogaead tuewa6euel\l lseg snouen saglaasep laigdwed IV slyl •saglnlioe uolluanaad uognllod uo sassaulsnq pue siueplsaa /� _ '�, swaolu1 wea6oad uogaaload aaleMuealO /aaleMwaols . Y. ..f t• 1 ille .. : eplsaan!H to I(luno0 pue saino ', —' 1.------ : - all „Taal alt aalle, do 6wueala uegi /Cnsoo ssal . -I 1 "'� pue JGISBe yanw sl uogniiod 6uguanaad a sneoag _ , ; ; sr(ennaaienn woolano otul �llaaalp Wea60Jd uoi13010ad 1010MueOi3/101eMtuaolS JO `suleap waols sleaals ow! SalseM muumuu 10 R1unoo pue said° au pue sielaaiew uogonatsuoo podsueat /(ew pu!M `I(lleuolllppv •slaaals luaoefpe •swelsl(sooeogenbe owo tuawlpas pue pnw to stunowe ,U' � . 1 :° : % 1.• ano to gileay ay} of leaayl snouas e asod ueo pue srteMaaleM luealllu6ls >{aeal asp ueo luawdlnba r wool ano 40 /Ciilenb all sazlpaedoaf 1! •elwollleD ul uognliod �(neay pue seIolyan uollanalsuoD � � ` 4 , j! ; , aaleM to eoanos aofew a se pa!llluepl uaaq sey salts uogona}suoo ', , i - V wai llouna aaieMwaols patnllod - }}Duna aaleMwaols ow! sluelnllod - s/(eNualeM pool sJe1uail eouo /fir - , eonpoatul pue sasseooad e6euleap leanteu agile rtnueoglu6ls swalgoad aldlilnw 6ugeaaa 'walsAs uleap c J ueo sagingoe uogona }suoo pue luawdolanap puel `JeA0M0H waols alt olul sa6aeyoslp tuawlpas ul ) '' •sseoowd al6oloap/(y panleu ayi to ped a s! llouna aalemwaots slinse.' uallo salts uogana }suoo le sloaiuoo } uawlpas pue uolsoaa alenbape weiwew :°5 > •` .savel pue saanp •swearls of aanlled uopeluawipas pue Corso ra `" y - p- ` leool .rno of � goeirp Moll /few - lueld luawleeil lale�tnalseM aae salt!nliae uogorulsuoo yilnn pa }eloosse v/ Ill i e of paloeuuoo lou am sure rp w.rois `sJaMas tielrues a>f/tun swalgoad uollnllod aaleMwaols • sAenrualennpool ano oiAlloaaipsluelnllod6u ltaodsueal Jo saaanos uowwoo isow onnl ay1 � to uoliaunl papualulun alt sanaas osle i! `tuawleaal aalenn aol • • epl■oad lou seop walsiCs uleap waols all Gauls 'seam padolanap S311IAIl3d NOII3OIl1SNO3 pue siaaals wall r(eMe aaleMulea sseoxa 6ul,Gaea ICq 6ulpooll aanpeJ of pau6lsap sem walsis WON uleap waols all •suleap waols pue saaMas - swalsAs a6euleap oMl sey Awno0 aplsaan!H NOIIA11od 831VMWIIotg moux pinoL(5 noA lioa ... uogn«od tarpuoT5 Resources To report a hazardous materials spill, call: StormWate PoIIuLion r Riverside County Hazardous Materials State Water Resources Control Board Emergency Response Team What Division of Water Quality (909) 358 -5055 8:00 a.m. — 5 :00 p.m. vY IIAt you should know for... 1001 I Street (909) 358 -5245 after 5:00 p.m. Sacramento CA 95814 In an emergency call: 911 GENERAL (916) 341-5455 CONSTRUCTION & www. swrcb. ca . govgov!st !stormwtr/ For recycling and hazardous waste SITE SUPERVISION disposal, call: Colorado River Basin Regional Water (909) 358 -5055 - 0 _ = Quality Control Board - R Region 7 a 73 - 720 Fred Waring Drive, Suite 100 r, '' 'WA-4 .. j Palm Desert, CA 92260 To report an illegal dumping or a _.. =- %�, !1 - -. r �/ (760) 346 - 7491 clogged storm drain, call ..- www.swrc,,.ca.gov ~rwgcb 1- 800 -506 -2555 >. % ®'�-vaa`" (0' Santa Ana Re Tonal Water To order additional brochures or to obtain 9 information on other pollution prevention ' _ 4 //p ., i "`' .:,, . ik„ Quality Control Board - Region 8 activities, please call (909) 955 -1200 or visit the 3737 Main Street, Suite 500 StormWater /CleanWater Protection Program ..410, 4 , -'_` website at: f ' Riverside, CA 92501 -3348 www.co. riverside .ca.us /depts /flood /waterquality (909) 782 -4130 npdes.aso www.swrcb.ca.govi- rwgcb8/ Best Management t r�'1 r Practices OWN] San Diego Regional Water for: Quality Control Board - Region 9 JOW ' - w 4 1 4 . " • 9771 Clairemont Mesa Blvd., Suite A J Developers PROTECTION PROGRAM San Diego, CA 92124 J General Contractors (858) 467 -2952 The StormWater /CleanWater Protection Program .) Home Builders www.swrcb.ca.gov / rwgcb9/ gratefully acknowledges the Santa Clara Valley Nonpoint Pollution Control Program, Alameda -) Construction Inspectors Countywide CleanWater Program and the City of Anyone in the construction LosAngeles Stormwater Management Division for information provided in this brochure. business What Should You Do? BEST MANAGEMENT PRACTICES Advance Planning to Prevent Pollution The following Best Management Practices (BMPs) can significantly reduce pollutant discharges from your construction site. Compliance with stormwater regulations can be as simple as minimizing stormwater contact with potential pollutants by providing covers and secondary containment for J Remove existing vegetation only as construction materials, designating areas away from storm drain systems for storing equipment and needed. materials and implementing good housekeeping practices at the construction site. J Schedule excavation, grading, and j Protect all storm drain inlets and streams J Clean -up spills immediately using dry paving operations for dry weather located near the construction site to clean -up methods (e.g., absorbent periods, if possible. prevent sediment -laden water from materials such as cat litter, sand or rags entering the storm drain system. for liquid spills; sweeping for dry spills _I Designate a specific area of the such as cement, mortar or fertilizer) and construction site, well away from 3 Limit access to and from the site. Stabilize by removing the contaminated soil from storm drain inlets or watercourses, construction entrances /exits to minimize spills on dirt areas.. for material storage and equipment the track out of dirt and mud onto adjacent maintenance. streets. Conduct frequent street J Prevent erosion by implementing any or a sweeping. combination of soil stabilization practices 1 Develop and implement an effective such as mulching, surface roughening, combination of erosion and j Protect stockpiles and construction permanent or temporary seeding. sediment controls for the materials from winds and rain by storing construction site. them under a roof, secured impermeable J Maintain all vehicles and equipment in J Practice source reduction by tarp or plastic sheeting. good working condition. Inspect frequently Y for leaks, and repair promptly. ordering only the amount of materials that are needed to finish J Avoid storing or stockpiling materials near storm drain inlets, gullies or streams. J Practice proper waste disposal. Many the project. construction materials and wastes, J Phase grading operations to limit disturbed including solvents, water -based paint, J Educate your employees and areas and duration of exposure. vehicle fluids, broken asphalt and subcontractors about stormwater concrete, wood, and cleared vegetation management requirements and can be recycled. Materials that cannot be their pollution prevention J Perform major maintenance and repairs recycled must be taken to an appropriate responsibilities. of vehicles and equipmentoffsite. landfill or disposed of as hazardous J Control the amount of surface runoff J Wash out concrete mixers only in waste. at the construction site by impeding designated washout areas at the Y p g construction site. J Cover open dumpsters with secured tarps internally generated flows and using or plastic sheeting. Never clean out a berms or drainage ditches to direct dumpster by washing it down on the incoming offsite flows to go around J Set-up and operate small concrete mixers construction site. the site. Note: Consult ;ocai on tarps or heavy plastic drop cloths. a , age policies for more J Arrange for an adequate debris disposal information. J Keep construction sites clean by schedule to insure that dumpsters do not removing trash, debris, wastes, etc. on a overflow. regular basis. GENERAL CONSTRUCTION ACT1VIT1ES STORMWATER PERMIT (Construction Activities General Permit) The State Water Resources Control Board SWRCB prior to grading or disturbing soil at • Update the SWPPP as needed, to (SWRCB) adopted a new Construction the construction site. For ongoing manage pollutants or reflect changes in Activities General Permit (WQ Order No. 99- construction activity involving a change of site conditions. 08DWQ) on August 19, 1999, superseding ownership, the new owner must submit a new the now expired SWRCB statewide General NOI within 30 days of the date of change of • Include description of post construction Permit (WQ Order No. 92- 08DWQ). This ownership. The completed NOI along with the BMPs at the construction site, including permit is administered and enforced by the required fee should be mailed totheSWRCB. parties responsible for long -term SWRCB and the local Regional Water Quality maintenance. Control Boards (RWQCB). The updated What must i do to comply with Construction Activities General Permit the requirements of the NOTE. Please refer to the Construction establishes a number of new stormwater management requirements for construction Construction Activities General Activities General Permit for detailed site operator. Permit? information. You may contact the SWRCB, your local RWQCB, or visit the SWRCB NOTE: Some construction activies • Implement BMPs for non - stormwater website at r . ca cc.- s:o_ to stormwater permits are issued on a regional discharges year- round. obtain a State Construction Activities basis. Consult your local RWQCB to find out if Stormwater General Permit packet. your project requires coverage under any of • Prepare and implement a Stormwater these permits. Pollution Prevention Plan (SWPPP) prior p to commencing construction activities. How long is this Construction Activities General Permit in Frequently Asked Questions: • Keep a copy of the SWPPP at the effect? construction site for the entire duration of The Permit coverage stays in effect untilyou Does my construction site the project. submit a Notice of Termination (NOT) to the require coverage under the SWRCB. For the purpose of submitting a re q 9 • Calculate the anticipated stormwater run- NOT, all soil disturbing activities have to be Construction Activities General off. completed and one of the three following Permit? criteria has to be met: Yes, if construction activity results in the • Implement an effective combination of disturbance of five or more acres of total land erosion and sediment control on all soil 1. Change of ownership; area or is part of a common plan of disturbed areas. development that results in the disturbance of five or more acres. • Conduct site inspections prior to 2. A uniform vegetative cover with 70 anticipated storm events, every 24 -hours percent coverage has been established; How do I obtain coverage during extended storm events, and after or, actual storm event. under the Construction 3. Equivalent stabilization measures such Activities General Permit? • Perform repair and maintenance of BMPs as the use of reinforced channel liners, Obtain the permit package and submit the as soon as possible after storm events soil cement, fiber matrices, geotextiles, completed Notice of Intent (NOI) form to the depending upon worker safety. etc., have been employed. • 111 • • For lnformatlon: Pollution Do you know ... where the woter should go? LOCAL SEWERING AGENCIES _ _- ! . - - Riverside County has two drainage systems - sanitary ��/� IN RIVERSIDE COUNTY: Mat t Iat you should know for.,. �e ► sewers and storm drains. The storm drain system is designed to prevent flooding by carrying excess - City of Beaumont (909) 769 — � I i _' ' rainwater away from streets... it's not designed to be a Belair Homeowners Association (909) 277 1 _ , waste disposal system. Since the storm drain system City of Blythe (760) 922 -6161 � � ' OUTDOOR CLEANING City of Banning (909) 922 - 3130 d oes not provide for water treatment, it often serves City of Coachella (760) 391 - 5008 the unintended function of transporting pollutants Coachella Valley Water District (760) 398 -2651 ACTIVITIE$ directlytoour waterways. City of Corona (909) 736 -2259 Desert Center, CSA #51 (760) 227 -3203 NON-STORMWATER DISCHARGES '"'�� Eastern Municipal Water District (909) 928-3777 �� Unlike sanitary sewers, storm drains are not Elsinore Valley MWD (909) 674 - 3146 - �? 1 connected to a treatment plant they flow directly ■ Farm Mutual Water Company (909) 244-4198 c to our local streams, rivers and lakes. Idyllwild Water District (909) 659 - 2143 - Jurupa Community Services Dist. (909) 685 -7434 Non - stormwater discharges such as Lake Hemet MWD (909) 658 -3241 ,- �..,;. washwater generated from outdoor Lee Lake Water District (909) 277 - 1414 .' ' ' ' cleaning projects often transport harmful Soaps, degreasers, automotive fluids, litter, and a host March Air Force Base (909) 656 - 7000 of other materials washed off buildings, sidewalks, ( ) po into storm drains and our local Mission Springs Water District (760) 329 - 6448 1 plazas, parking areas, vehicles, and equipment can all // waterways. Polluted runoff contaminates City of Palm Springs (760) 323-8242 /, pollute our waterways. Rancho Caballero (909) 780 -9272 , ,1.., local waterways and poses a threat to Rancho California Water Dist. (909) 676 -4101 _ , '14 groundwater resources. `i 0 Ripley, CSA #62 (760) 922-4909 �� Rubidoux Community Services Dist. (909) 684-7580 ' 1� \i ` i :r — City of River (909) 782 -5341 ! A ' 1 • - - Silent Valley Club, Inc (909) 849 -4501 j - R _ Valley Sanitary District (760) 347-2356 . , . - The Cities and County of Riverside Western Municipal Water District (909) 780 -4170 ONO m ice• - mats ,.>,...././.1111,,, StormWater /CleanWater Protection Program vow Aft ini SPILL RESPONSE AGENCY: Since preventing pollution is much easier, and less costly than cleaning up "after the fact," the HAZ -MA r: (909) 358 -5055 Cities and County of Riverside StormWater /CleanWater Protection Program informs residents and HAZARDOUS WASTE DISPOSAL: (909) 358 -5055 GUIDELINES businesses of pollution prevention activities such as those described in this pamphlet. TO REPORT ILLEGAL DUMPING OR A CLOGGED STORM DRAIN: 1 -800- 506 -2555 The Cities and County of Riverside have adopted ordinances for stormwater management and f or disposal of washwater discharge control. In accordance with state and federal law, these local stormwater ordinances prohibit the discharge of wastes into the storm drain system or local surface waters. This includes f rom. non - stormwater discharges containing oil, grease, detergents, degreasers, trash, or other waste t St ormWater materials. - , - .) Sidewalk, plaza or parking lot cleaning W j n a er . Vehicle washing or detailing PROTECTION PROGRAM , Building exterior cleaning 4 1 —_ - _ r Waterproofing � L— — 1 4 tirA Riverside County gratefully acknowledges the Bay Area Equipment cleaning or degreasing ID Stormwater Management Agencies Association and PLEASE NOTE: The discharge of pollutants into the street, gutters, storm drain system, or waterways - the Cleaning Equipment Trade Association for without a Regional Water Quality Control Board permit or waiver is strictly prohibited by local ordinances information provided in this brochure and state and federal law. III li gip rotect ur Walerwaiis! Use These Guidelines For outdoor Cleaning Activities and Wastewater Disposal DO . . . Dispose of small amounts of washwater from cleaning Do . . . Understand that mobile auto detailers should divert OTHER TIPS TO HELP building exteriors, sidewalks, or plazas onto landscaped or unpaved washwater to landscaped or dirt areas. Note: Be aware that soapy surfaces provided you have the owner's permission and the discharge will washwater may adversely affect landscaping; consult with the property PROTECT OUR WATER . . . not c1' flooding or nuisance problems, or flow into a stone drain. owner. Residual washwater may remain on paved surfaces to evaporate; Do NOT ... Discharge large amounts of these types of washwater sweep up any remaining residue. If there is sufficient water volume to reach SCREENING WASH WATER onto landscaped areas or soil where water may run to a street or storm the storm drain, collect the runoff and obtain permission to pump it into the , c;initw ewer. Follow local sewering agency's requirements for disposal. A thorough dry cleanup before washing (without drain. Wastewater from exterior cleaning may be pumped to a sewer line soap) surfaces such as building exteriors and decks with specific permission from the local sewering agency. Do NOT ... Dispose of left over cleaning agents into the gutter, without loose paint, sidewalks, or plaza areas, should storm drain or sanitary sewer. be sufficient to protect storm drains. However if any DO . . . Check with your local sewering agency's policies and debris (solids) could enter storm drains or remain in requirements concerning waste water disposal. Water from many the gutter or street after cleaning, washwater should outdoor cleaning activities may be acceptable for disposal to the sewer first pass through a "20 mesh" or finer screen to catch ID system. See the list on the back of this flyer for phone numbers of the Regarding Cleaning Agents: the solid material, which should then be disposed of sewering agencies in your area. in the trash. Do NOT . . . Pour hazardous wastes or toxic materials into the If you must use soap, use biodegradable /phosphate free cleaners. Avoid use storm drain or sewer s stem . ro erl dispose of it instead. When in of petroleum based cleaning products. Although the use of nontoxic cleaning y p p y p products is strongly encouraged, do understand that these products can still DRAIN INLET PROTECTION/ doubt, contact the local sewering agency! The agency will tell you what types of liquid wastes can be accepted. degrade water quality and, therefore, the discharge of these products into CONTAINING & COLLECTING HYDRO- WASH WATER CL N • • Sand bags can be used to create a barrier around Do . . . Understand that water (without soap) used to remove dust 0 J _ ,_ storm drain inlets. from clean vehicles may be discharged to a street or storm drain. �, - �, -0 '� - - • Plugs or rubber mats can be used to temporarily Wastewater from sidewalk, plaza, and building surface cleaning may tg ': it r--- ! seal storm drain openings. 'Imitillii go into a street or storm drain if ALL of the following conditions are met: • A ` r "'� • You can also use vacuum booms, containment � v 1) The surface being washed is free of residual oil stains, debris and i * wow Nob _ pads, or temporary berms to keep wash water similar pollutants by using dry cleanup methods (sweeping, and __ away from the street, gutter, or storm drain. cleaning any oil or chemical spills with rags or other absorbent materials - �No.- , the street, gutters, storm drain before using water). system, or waterways is prohibited EQUIPMENT AND SUPPLIES 2) Washing is done with water only no soap or other cleaning materials. ? , - ; � ; by local ordinances and the State Special materials such as absorbents, storm drain • 3) You have not used the water to remove paint from surfaces during _. - tip.,_• 1 -• + _ Water Code. plugs and seals, small sump pumps, and vacuum cleaning. booms are available from many vendors. For more Do NOT ... Dispose of water containing soap or any other type of information check catalogs such as New Pig (800 - cleaning agent into a storm drain or water body. This is a direct violation of 468 - 4647). Lab Safety Supply (800 356 0783), C &H state and /or local regulations. Because wastewater from cleaning Note: When cleaning surfaces with a high pressure washer or steam (800 558 - 9966), and W.W. Grainger (800 994 - 9174); parking areas or roadways normally contains metallic brake pad dust, oil cleaning methods, additional precautions should be taken to prevent the or Call the Cleaning Equipment Trade Association 0 and other automotive fluids, it should never be discharged to a street, gutter, or storm drain, discharge of pollutants into the storm drain system. These two methods of g00 441 - 0111 or the Power Washers of North surface cleaning, as compared to the use of a low pressure hose, can (800 remove additional materials that can contaminate local waterways. America (800 393 - PWNA). Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Appendix E Soils Report • December 15, 2011 John R. ByErly 8 I N C O R P O R A T E D 3 • ti January 25, 2011 i i 1 Alpha Technologies Rpt. No.: 7791 3767 Alpha Way File No.: S -12984 • Bellingham, Washington 98226 d Attention: Ben Strunk, Construction Services Project Manager Subject: Proposed Time Warner Temecula Server Building, Veterans Park, East Side of La Serena Way, North of South General Kearney Drive, Temecula, California; Recommendations for Drywell Design Reference: Geotechnical Report, Proposed Time Warner Temecula Server Building, John R. Byerly, Inc., Rpt. No. 7504, October 15, 2010 Gentlemen: k The referenced report presents earthwork and foundation design recommendations for the p • . proposed building. In order to accommodate the preliminary stage of storm water flow on the site, drywells will he constructed to the west and south of the new building. It is anticipated that the drywells will have a depth of 20 feet and a diameter of 3 feet. Approximately 0.5 foot and 2.0 feet of fill will be required to achieve the finished grade elevations in the vicinity of Borings 1 and 2, respectively. The site configuration and proposed development are illustrated A on Enclosure 1. To determine the percolation characteristics of the on -site soils to assist in establishing the design rates for the drywells, an additional soils investigation was performed. This report has been prepared for the exclusive use of Alpha Technologies and their design i consultants for specific application to the project described herein. Should the project be modified, the conclusions and recommendations presented in this report should be reviewed by 3 the geotechnical engineer. Our professional services have been performed, our findings obtained, and our recommendations prepared in accordance with generally accepted engineering principles and practices. This warranty is in lieu of all other warranties, express or implied. : • GEOTECHNICAL ENGINEERS • TESTING AND INSPECTION 2257 South Lilac Ave Bloomington. CA 92316 -2907 Bloomington (909) 877 - 1324 Riverside 1909) 783 - 1910 Fax 1909) 577 - 5210 1 1 4 Alpha Technologies Rpt. No.. 7791 • January 25, 2011 File No.: S -12984 Page 2 1 1 PREVIOUS GEOTECHNICAL INVESTIGATION The subsurface exploration described in the referenced investigation report consisted of four test borings drilled with a track - mounted flight- auger. Boring 2 was drilled to a maximum depth of 51.5 feet. The approximate location of this exploration and the corresponding boring log are presented on Enclosures 1 and 2, respectively, of this report. Relatively undisturbed soil samples were recovered at various intervals in the borings with a California sampler. Artificial fill comprised of medium dense to dense silty sands with varying amounts of gravel was encountered at all the test boring locations. The depth of fill ranged from 3.0 feet to 15.0 feet, The relative compaction of the fill varied from 89 percent to 94 percent, with an average value of 91 percent. The natural soils encountered in our test borings generally consisted of medium dense to very dense sands to clayey sands with varying amounts of gravel. Neither I • bedrock nor ground water was encountered in our test borings. Earthwork and foundation • design recommendations were presented for a conventional shallow foundation system. SITE CONDITIONS The proposed Time Warner Server Building will be located within Veterans Park, located on the east side of La Serena Way and north of South General Kearney Drive in the city of Temecula. An Index Map showing the general vicinity of the site is presented on the following page. The coordinates of the site are latitude 33.5186° N and longitude 117.1212° W. utilizing the North American Datum (NAD) from 1983. The area of the park to be developed is currently occupied by vertical satellite dish supports and associated foundations, a wrought -iron fence, and a concrete drainage swale. The portion of the site that will accommodate the building and drywells is located on the side of a relatively low west - facing hill. A berm comprised of up to 15 feet of artificial fill surrounds the area where the building will be located. The area surrounded by the berm contains the majority of the satellite dishes. The berm has side slopes ranging from 1.9:1 (H:V) to i • 1 U INDEX MAP ul • I 'A • • -,---.- ' I - , ji -- , •• - . . 1 1 ....., _. ______ 1 I _. .:- - , : ,--, = 4;1 / - 7 - -, I= 4- "K' -.L..; I. . °I ' c '• - • -1/4 ---- ck 1 , - . i I i l . 11 ; . ■ - ..., ,-, .._ - ,;......- 1 ' 7.-I-- -- if4 " - ="I".. - - H - 4 , • ,,,,,i - .. ,_, r-r'Ci - . . - -:' \ : -.. :. . . ratle 4 ° . / - SI 1 E '-• ------ . ; , „ ,y , , I - 4 _,. I ' -” , -' .„. _ . 1 " I • - /t :5 - i '-' -- : •"- f --" • - . .,2 / 4-:--,:---.•-e- - .",_.:; \-1 .f ( - 1 '7'?' /---- -,---_, -- ,,--i -- L \J ' . 7 ' . .- r j . ...... 1 1 ' r '''H .' 24 ? 2r1 'CL r . . 4 .... . ,. .___. . . -- Y1 t=i j* ,, ---' - ,-, --- • :11,-`-;?••-' :,,,T7-1 _ , -- SOURCE: DOCL.IMPNT USGS BACHELOR MTN CALIF 1976 1 I ------- TOWNSHIP AND RANGE - TS RTJV SECTION 31 I 1 N 1 C A r 0 P A ! E 7 .' John R. Eitties:Ey ' OTUSITUDE 1" 1212' 1 -- -- 0 IruDE 31' 3 2a Rpt No . 7791 File No S-12984 4 4 Alpha Technologies Rpt. No,: 7791 •• January 25, 2011 File No., 5-12984 x. Page 3 ti w 2 i 5.3:1 (H:V). Trees up to 18 inches in diameter occupy the top of the berm. Portions of Veterans Park surround all sides of the site. Access to the property is by an unpaved access road off of Lii South General Kearney Drive to the south. The San Diego Aqueduct runs below or immediately adjacent to this road. The site slopes downward to the west at an average gradient of about n 1 7 perGC'rrt. The unpaved access road slopes downward to the south at an average gradient of about 6 percent. It FIELD INVESTIGATION For this current investigation, the soils underlying the site were explored by means of two test $ borings excavated with a track - mounted flight -auger to a depth of 20 feet below the existing 4 I) ground surface. The approximate locations of the field explorations are shown on Enclosure 1. The soils encountered were examined and visually classified by one of our field engineers. 0 A summary of the soil classifications appears as Enclosure 2. The test boring logs show subsurface conditions at the dates and locations indicated, and may not be representative of other M 1 locations and times. The stratification lines presented on the exploration logs represent the approximate boundaries between soil types._ and the transitions may be gradual. I A 3- inch- diameter perforated pipe was inserted inside the hollow -stem auger to the appropriate test depth. Subsequent to withdrawal of the auger, the soil cuttings were placed in the annular space between the pipe and boring sidewall. Clear water was introduced into the borings from a water - trailer to bring the water level to approximately 5 feet or 10 feet below the existing ground surface. At intervals, the level of water was measured and additional water added to the test ti holes to bring the water level up to a depth of about 5 feet in Boring 1 and 10 feet in Boring 2. rj In order to determine the relative percolation characteristics of the deeper natural soils, the holes were not recharged prior to the last two water level readings. A summary of the percolation test results is presented on Enclosure 3. Enclosure 4 presents the field test data. The percolation e • s; 4 r L 7 Alpha Technologies Rpt. No., 7791 • January 25. 2011 File No.: S -12984 Page 4 rates have been corrected for the presence of the annular soil backfill adjacent to the perforated pipe. The derivation of the correction factor is presented on Enclosure 5. SOIL CONDITIONS Engineered fill comprised of dense silty sands with a trace of gravel was encountered in Borings 1 and 2 to depths of 14 feet and 5 feet. respectively. The underlying natural soils 9 encountered at our exploration locations consisted of medium dense silty sands with a trace of gravel. Neither bedrock nor free ground water was encountered at our boring locations. CONCLUSIONS AND RECOMMENDATIONS Our field observations and test results indicate that the soils in the areas proposed for drywell • installation are relatively permeable. The percolation test result in Boring 1 was 4.9 gallons of clear water per square foot of sidewall area per day, and in Boring 2 a rate of 16.4 gallons of clear water per square foot of sidewall area per day was determined, Due to the potential for siltation, a safety factor of 5.0 should be used, so the drywells in the vicinity of Borings 1 and 2 should be designed for rates of 1.0 and 3.3 gallons per square foot of sidewall area per day, respectively. If the storm water will pass through a filter to remove suspended silt prior to entering the drywells, the factor of safety may be reduced. ci 3; • L itt 9 i • li r b Alpha Technologies Rpt. No.. 7791 • January 25, 2011 File No.: 5 -12984 Page 5 li y f f The conclusions and recommendations presented in this report are based upon the field investigation described herein and represent our best engineering judgment. Should conditions he encountered in the field that appear different from these described in this report, we should be contacted immediately in order that appropriate recommendations might be prepared. Y Respectfully submitted, 1 JOHN R. BYERLY, INC. ,t � FL C7 ---- � go. C�298 1 �'. L ` � � e¢.narersart * Glenn S. Fraser, Geotechnical Engineer Project Manager A rt 'I t , No. GE000179 Vi tsvi-70-------4 Byerly, Geotechnical Engineer Eat. Date 6-30-11 President 4 R JRB:GSF:jetopr Enclosures: (1) Plot Plan (2) Test Boring Logs (3) Summary of Percolation Test Results (4) Summary of Field Test Data (5) Soil Correction Factor Derivation Copies: (3) Client (.3) Brian Bloom, Architect i i tj e Boring 'I Se ./ <& „\- e , b dtt ifi <.‘ 0* Boring Date: 1/14/11 , ...„,e c .„,e• 0 wz..). 0 „.e. Acfr se c., o C Surface Elevation 12135 , N. 4. 7 ° cd r t'('' •Q 4 Q- Drilling Method Flight-auger 0 . ..-' i 1 . -. SM Brown silty fine to coarse sand With a trace of gravel, damp .. . I ti i...:.,:: and dense (FILL) I i •;.- -. • i ' • :::: I i 5 , -. • . , . , . . . . . 'a o 10 • : ..: et r.• .• : SM Brown silty fine to coarse sand with a trace of gravel. damp e t 15 and medium dense (ORIGINAL GROUND1 e . . p. L • : H .- . . . z2(3 1 . I I, Total Depth at 20 0 Feet d No Free Ground Water Encountered I — E! 'F i 1 1 I id I I 1 a ial I m g 1 . I LOG OF BORING fir Pr '5-- oposed Time Warner Enclosure 2, Page 1 1 .4 John R. ByerIy, Inc. Temecula Server Building , Report No.: 7791 i I File No.: S-12984 I i i �u ; I ; Boring 2 , � ' a � �� c ,o I � • � J , . s � ` o _ . .k�Q ., � oc we c ' a G0 ° . � � . . : . gc „ Q � � : �,��s . E?oring Date: 1114111 I . ��- ��'' Q`�� a b' O .: �S� ' c�° ,,e` " Surface Eleiat�nn: t2T2.0 - � e� �� *o .i , �s � a � . � � � tn`' . �P � � �. �y.Q . " ¢¢ "� �. . . Drrliing Method Ffcgh£-auger , ` j , ,. . � . I i ..... ...__ __._._. ._.. ,.. I � I � � SM i �� F3ra;��n silty frne to r.�ecli�.m sartd, damp znd dense (RLI_j� i � � � � �� I I ; I I I I � � � I ; I � " i , � .._ f: i � ; i _ � - . ._.. ... _._. . . ... I . _ � ' F �; SM f'rnv7 c�lt,� firP ie carse sai e! with a tsace of�grsv=f dan�p ... � I ,, ! . i i �. � j gnc' r,t.di:,rrf -I,��S. C7F11C INAL :�Rrit��lD)r � I I � I � E o� ,� , � , �� ; � � �. � � , �p_��_..�g I j I � ��'�� ry I i � � i � I � ��. ! ` I I Si� I ■ u o.. w g I I ■ ° 20 i _ — —. _. _ ., . _ _. *� ', � � Total Depth at 20.0 Feet � u � No Free Ground VJater�Encountered E I i � LL I' i o i I � � a 25 I I i f � x � I I � , y I 3 '- � I_.. gp ��'� � I � � � � ' �, � g4. i I i a � I � � ^� 35 1 I �- _ � __ � � __ I � i LOG OF BORING � __ _ . __ _ __ ___ _ _ __ _ _ __ _ : � ''�� Proposed Time Warner er,c�o5ure z Page 2 I � �'� Jahn R, B er! /nc, � I Repart No.: 7791 I y y� � Temecula Server Buildinq __.. ..__._ _._ ...._.. . . _._. ,---- ..__. .._ '.. Fiie No.: S-12884 _. ___.. ..__. ___._ ....._....__ ....; � •Ft r Boring 2 3 . *� 4' a04, f 4` \ c- C \`e. G • z ,+ ea t � r o d` � a� �a�w Boring Date. 10(1i1 >Lr >t� F Cc 3f e ry ° 0 y ¢,-,,' Surface Elevation: 1201.8 1 O 6 � , r t 0 4 9 �, S, Drilling M Flight -auger .. -_ .. • :! SM Brown. silty tine to medium sand with a trace of gravel damp 15 ` 120 47 91 F 'i F and dense (FILL) , j 12.6 118 5.1 90 T - ti : SM Brown silty fine to medium sand with a trace of gravel damp 11 9.1 113 4. ` 86 i and dense (ORIGINAL GROUND) - .becoming medium dense at 5.5 feet Iti : j :1 ''4 9.6 ...._ ry /:i� St, Brow ravey t ine to coarse sand: rnor.sl and dense 1" H 34 >. 1 22 1n, __.. Il ' SM Rea brawn clayey fine to coarse and with sand seams, nwist I /l S . I I : r Sr' and dense C IE 4 B _ • -- 20 _ 36 19. i 123 9.3 9 ` SP Brown fine to coarse sand with a trace or silt, moist and dense 3' 2 ' N e f 30 40 SM Brown silty fine ro coarse sand, moist and dense m i � I r Fl. :e 45 � SC Brown- orange clayey fine to coarse sand Moist and dense s • _ 40 $ 28 - (1: SM Brown silty fine to medium sand, moist and medium dense 43 Sp Brown fine to coarse sand with a trace of silt, moist and . dense _i ill t.„ - 50 56 ' i - becoming very dense at 50 0 feet j Total Depth at 51.5 Feet a • No Free Ground Water Encountered ' y b i L ... -. . B0 u 1 d • .. y _._ 70 Enclosure 2, Page 3 File No.: 7791 LOG OF BORING File No.: 5 -12984 •? 4 I Proposed Time Warner Enclosure 2. Page 2 John R. Byer /y, Inc. Temecula Server Building i Report No.: 7504 File No.: 5-12984 i, b • SUMMARY Or PERCOLATION RATES 7 Test Boring No. Depth (Ft.) Percolation Rate (Gals /Sq. Ft. /Day) 1 20 4, 9 2 20 184 t a I i T • Enclosure 3 Rpt. No 7791 2s File No.: S -12984 ve' kr“: rezla ti9teml k=: et= fd ..'°''17011 IS ION Way etiaall Ma PM= t*- ° :'h3&t MOM r I-7 .� 3ai JOHN R. � YERLY, INC. • PERCOLATION TEST DAW - SEEPAGE PITS - Q = 45 OR • File No.: 5- 12984 L Job: Proposed Time Warner Temecula Bldg Date: 01 -17 -11 By: IT Remarks: Correction factor of :5 .T.._ Bor. No. 1 Dia. (in.) 3"18" Bor. No. 2 Dia. (in.) 3 "l8" Bor. No. Dia. (in. I Time I 1 Q I � Time ID Q Time I Read. I Depth 2 Time Read. Depth Time Read. Depth Gal/ft : Read (ft) I intvl. (FT) Gallft Read (ft) Intvl. ( �� Gailft' Read (ft) lntvl. (FT) (hr) day (hr) day (hr) day 928 I 10.0' .50 20' 52.7 9:35 5.0' .50 20' 56.5 R I 9:58 16.1' I 26.3 10:05 14.6' I 28.2 [---- 111 10:00 10.0' .50 20' I 5Z7 10:07 5.0' .50 I 20' 45.7 I 1 I 10:30 16,1 j + I 26.3 10:37 13.4' I 23.3 T 10:32 10.0' .50 I 20' 1 51.5 10:39 5.0' 50 20' 41.5 11:02 16.0' 25.7 11:09 12.7' 20.7 11'04 10.0' .50 I 20' 46.7 11:11 5.0' .50 20' 39.3 11:34 15.6' I 23.3 11:41 12.4' 19.7 11:36 10.0' .50 20' 422 11:43 I 5.0' .50 20' 39.3 - 12:06 15.2' 21.1 12:13 12.4' 19.7 12:08 10.0' 50 20' 42.2 12;15 5.0' .50 20' I 37.2 12:38 15.2' 21,1 12:45 12.1 18.6 j I • 12:40 1 10.0' .50 20' I 41.1 12:47 5.0' .50 20' 37.2 1:10 I 15.1' ' 20.5 1:17 12.1' 18.6 1:12 10.0' .50 20' 41.1 1:19 5.0' .50 20' 36.5 MEM 1:42 I 15.1' 20.5 1:49 , 12.0' 18.3 1:44 10.0' .50 20' 40.0 1:51 5.0' .50 20' 36.5 2:14 15.0 20.0 2:21 12.0' 18.3 I • 2:16 10.0' 50 20' 40.0 2:23 5.0' .50 20' 36.5 Enclosure 4. Page 1 2:46 15.0' 1 20.0 2:53 i 12.0' 18.3 Rpt. No 7791 File No S -12984 Ems" 49 *Aar EM«- , y Waal r iura Wag DSOS a Masi ie MN CINOIN eiElenr talliaall IOM p. fl Kai icralae: "4.411 JOHN R. YERLY, INC. • PERCOLATION TEST DAV - SEEPAGE PITS - Q = 45 OR • File No.: S- 12984 L Job: Proposed Time Warner Temecula BLDG Date: 01 -17 -11 By: IT Remarks: Correction factor of .5 �____ Bor. No. 1 Dia. (in.) 3 "18" Bor. No. 2 Dia. (in.) 3 "18" Bor. No. Dia. (in.) Time Q Time Q Time Q Time I Read. Depth x Time Read. Depth I x Time I Read. Depth z Read (ft) I(hr} (FT) Gdaay Read (ft) l�hr)° (FT) I day Read (ft) i �h �' (FT) G aay 2:48 i 15.0' 50 20' 24.6 2:55 12.0' .50 20' 37A 3:18 16.7' 1 12.3 3.25 15.8' 18.7 3:20 16.7' 50 20' 9_8 3:27 I 15.8' 50 20' ( 32.7 I 3:50 17.2' I 4.9 3:57 17.6 16.4 4 i { i I i 1 i 1 I I [- I I I Enclosure 4, Page 2 Rpt. No.: 7791 File No.: S -12984 } y • } CORRECTION FACTOR CALCULATIONS Correction Factor = 'Volume Boring - Volume Pipet x % Voids of Gravel + Volume Pipe Volume Boring Diameter of Boring = 8.0 inches Diameter of Pipe = 3.0 inches Gravel Voids (Based on Laboratory Testing) = 0.42 Assume Unit Depth Correction Factor = [m(8/2) - n(3/2) ) + n(3/2) n(812) ; = 0.50 i Enclosure 5 Rpt. No.. 7791 File No : S -12984 0 • --- - - - - - - • ' - - - • ,..1 j i . 1 I 1 '• ' I , . , 1 , k, • n \ : . 1 • , , „.. .._ . --- - - -- - ,, .,. I . ' • , . - N. • ' .- . -- '''- - , . . , , ... .. - - - - - ' . - - ,.. - - --. ' - . _ _._ _ ... ..... ....... ... . ... - .. , , . - • . , . . . , . • . • . I ' 4.- ,'":„ .. I, i t ' .. . , , . • • . _ . _ . . _ ....... . , i • " K. '• • ,, „'s 0 . ,. . - ... ..- ... . , - - .. . . • .• .... _ . .... .... „... .- . . • . , \ , `--- / .. \ ., • . , , ......_ . . ., 1' .". ir ., „-- "- ___.- c ----- ( q--.; 40 11 , / 7,. „ ..,,,,:• ... .-- --' ------ ...--- e - ' ,. 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( 7,„ ‘ , / ‘ 1 • i ! / / / / INCORPORATED , • . . - ,, -. --...„_. __.............,......... --------.....,. -,...... : ..,..._ ...,,..._.. . .., . • .„ .-, .. \ - , ... ! ' ..., --k .. --- \ , ) NI ‘ 1 / I , 1 1 1 l I I i • - --_,. 0 _ -...... _...• . . ' ......_ +' , ' 1 -.. r , % . , , „ . . .,. .. , I i 1 ---- -,..1 .1 ' SOORC SO1,1, BRIAN R. BLOOM ARCHITECT, AUGUST 2010 Enclosure 1 Rot. No.: 7791 File No.: S-12984 Water Quality Management Plan (WQMP) Time Warner Cable Server Building • Appendix F Treatment Control BMP Sizing Calculations and Design Details December 15, 2011 Bio- retention Volume Calculations Worksheet 1 • DESIGN PROCEDURE FOR BMP DESIGN VOLUME 85'" percentile runoff event Designer: Joe Castaneda Company: JLC Engineering and Consulting, Inc. Date: 12/15/2011 Project: Time Warner Site - Bio- retention Volume Calculations Location: City of Temecula, County of Riverside 1. Create Unit Storage Volume Graph T7S, R1W a. Site location (Township, Range, and 19 (1) section) b. Slope value from Design Volume Slope = 1.2 (2) Curve in Appendix A. c. Plot this value on the Unit Storage Volume Graph shown on Figure 2. Is this graph Yes ® No d. Draw a straight line from this point to attached? the origin, to create the graph 2. Determine Runoff Coefficient ;• a. Determine total impervious area Almpervious = 0.020 acres (5) b. Determine total tributary area A,m = 0.123 acres (6) c. Determine Impervious fraction i = (5) / (6) i = 0.16 (7) d. Use (7) in Figure 1 to find Runoff OR C = .858i - .78i +.774i + .04 C = 0.147 (8) 3. Determine 85% Unit Storage Volume a. Use (8) in Figure 2 Draw a Vertical line from (8) to the in -acre graph, then a Horizontal line to the V, = 0.177 acre (9) desired V, value. 4. Determine Design Storage Volume a. VBMP = (9) x (6) [in- acres] Vamp = 0.022 in -acre (10) b. Vamp = (10) / 12 [ft- acres] VaMP = 0.002 ft -acre (11) C. Vamp = (11) x 43560 [ft3] Vamp = 78.968 ft (12) • • FIGURE 2: UNIT STORAGE VOLUME GRAPH 1 . 4 rah ` ` -� r ,.= st n R • rr 1 er lY _ � ,r v .x ' t § L "' pp tt .�. r : _ S ,v r ,D $ " Y - i ; ,� ( � " q t . . , r .. r: __r��+,,1F ,( .�. r 5 *fi 6 .N+ t 'sit r "t t r ' j ° -0' Jt " r L� y a � F a Y3t R R N f Y -A } S"'t K 'Y 'pi++ 6 Y 1.2 'rF ... e t r 3 ' s Y"b ,, ", �,' 'r_ k r r'p ( 3 r r n ..y 1. i 4s t ,' ri A' `.` rt s : , s x ; " a k �' ., r y $' §., x ., a t >r aa' x ,h 2 .e F ' t a +ew . ` , :}¢ 3 ,. , a y T, .: x. U ."N' a c,, ".:. { '� s x s ,t � fix r . ,� ^. `' U ";t w r y : v"4=t , ' t$ +� -.)-:/ . e ''- `h i g ,m 2 "S p , , <+i' r4 '- .. z r V to �,. " r ti.. al.`1r t . .. 9k r x� . r r ` r 9s° -Y3 a tffi i 4 d# 'E. xi &f,� T Ctrs 2 ^ r & * s t..xt * + ; v � ''. . r m t $ a ''" i, ,-, ,-" ,. - .. ` i , , "t ,{ "i,t � „. ' ' } , 7 x ` ■ y ' $m ° i t 1 'K . : ,3 4,d:-d-;..', . t!^' c ' r "" ' , - -r . r"a s' '; �'�' t^ O0 , .. W ' . r ' 'Y� ` fir ' 8 k $ �. r t m`,3 dd. i �*- ,e' S 'F� r - + �` +VOLUME(Vu)vs 4 * ''+ ' "' ? t � °'' f ,,y` � ` �, r' tVOLUME INDICATION LINE re O < "` r s " x� i $ !< r . "r5 . *, t '" Mtn .j ... r:,... '�&"T r 0 6 `" a" s � " i'j _ ", trsfi ' au„tr w' y; ,''� €+ r'` , * t t,: s. r , , - .A a j- . t , g ' t r 4 x - ,�'s s d w" •' , 4,2 sbs tH?i`, ::', 4e�'�dr�,:+''{> P * 'A,*`n,.0", -°' 'rS" ., v ". < ,, - " c t , x u-„t,t r ", z t rx a t p' -', r e,t fl ',`;1 k y t 4 ^ ,- c ac .? ~i`r p, -t "'' ; ' ag i . � r 7} ▪ 3� 1 x;- _ 'et t { fit x,r t. ' x < ` ak , 5, , 0.2 fi r .i o' k`, t t o `' � ` ,-% 4} t ▪ r `' xt ,-, nrf7 y i bt r M n✓'.> g 1 a ,:t F x k .- L K a .:* - .`,„ ' I '' {?.` -r -F 3n'Lr ` v .ar A: 0 :fri rU v .. ^,t *.fr r. fir. 0 0.2 0.4 0.6 0.8 1 1.2 RUNOFF COEFFICIENT (C) Subsurface Basin /Sand Filter Worksheet 1 • DESIGN PROCEDURE FOR BMP DESIGN VOLUME 85 percentile runoff event Designer: Joe Castaneda Company: JLC Engineering and Consulting, Inc. Date: 12/15/2011 Project: Time Warner Site - Subsurface Basin /Sand Filter Location: City of Temecula, County of Riverside 1. Create Unit Storage Volume Graph T7S, R1W a. Site location (Township, Range, and 19 (1) • section) b. Slope value from Design Volume Slope = 1.2 (2) Curve in Appendix A c. Plot this value on the Unit Storage Volume Graph shown on Figure 2. Is this graph Yes ® No d. Draw a straight line from this point to attached? the origin, to create the graph 2. Determine Runoff Coefficient a. Determine total impervious area A;mpervrous = 0.151 acres (5) • b. Determine total tributary area Af = 0.163 acres (6) c. Determine Impervious fraction i = (5) / (6) i = 0.93 (7) d. Use (7) in Figure 1 to find Runoff OR C = .858i - .781 +.774i + .04 C = 0.769 (8) 3. Determine 85% Unit Storage Volume a. Use (8) in Figure 2 Draw a Vertical line from (8) to the in -acre graph, then a Horizontal line to the V, = 0.923 acre (9) desired V value. 4. Determine Design Storage Volume a. VBMP = (9) x (6) [in- acres] VBMP = 0.150 in -acre (10) b. VBMP = (10) / 12 [ft- acres] VBMP = 0.013 ft -acre (11) C. VBMP = (11) x 43560 [ft3] VBMP = 546.128 ft (12) 0 • • • FIGURE 2: UNIT STORAGE VOLUME GRAPH 1-4 ',-. g X ," . ,e a " t „x. fi a Y f_ yF' Y' if a -St '; x' p c t t i E'F` 1 , X ' ' >'" � ° , 44ar Y i +r3 * •' ` 12 J- is fi- }r1' ,V c x w T r 's+wc rt ' v ' IV x r ai 3 `r t oi- --V - 3 ;ate �.. o > H� . . ra } i , � oI ,.T." s P4'S6' a L " $-"� ' 9 +zs r ss r " ^ s „.t y , ri - 43: t - y, 4 r •& , , r ,Y ` ' , '� Af' < t*-” k er r t i s a a > 't r "i ' Fs i " „';, ili4 '.' �t { 'i ! ,A s$ t - ' ' v fi N k : r N3 7 t ,s r , ?. %2: s'i biz., - tr ;"=x4$17'[r.+..miff., c`"�1 tu r ' w " d $ :; a°s ; ', ! "#M . r .'+.., A; s '-� �� sk s,3% �. 2 1' �.,t'X 4.. f 0 0 6 t z CF _ ie.:i , s e'Z" ,�. f r„,....xk :Zx`r:t �a' 'x t .�. d rs "s .i , a . a t i " h; t o w l ; { "vs),A " ,Lxn2,4.A,:,s xi., uzd°ci` 'Ti 'X,.{i } J w4' `SK Y y 4 & .Y w x r o- A l;, `t t�1 � VOLUME (Vu) vs. RUNOFF COEFF. (C) a r : r P y x r , �' .0) ' ' S er x ' ' a r 4,-74;:$,,--4 r � e X ^•,,. }+ + ,e' '?i Q tt k w ` " t + s ,. .. „' —a— VOLUME INDICATION LINE CC c rt s 4. a. k< % e v. ? r s h a`t' +� ' ;- n , i - P u,., 3 `` t'' ,—,-.4:1e.; 4: ,.r Y -V i < a, _ s :A h.Va>te.v 7 ' t ' r F O 6 a r A a s, a r' 10 _ 4 `s a 1 m w.r 2 W, l 2 Uw CO Yex a � `7 A� ,n 0 4 ? a x fi A ?ar . b kt. p , a} w"3= tz 7 's f 2t ] { r iz�.�f �i:c ';{rr' A2y�'�"¢. �� r $' �i z,, v.,fiX.`{" x asY,�. �'t��e' = rf- a � s } �� J ., � x h ;� U ^, a�P1 j " a zx v < Hirt f e2.? '' d t °Fk r zt' ¢x. { fi J ` 3 2 1 4, .Fa ^ k , n W k s 01 . G` Fa+( w` 0.2 c ;d s .r , _'G y i p "x -ro»r2 a 4 ` ' tk 2 ,„„ le t y "i S c ,�. i i f* ra �` ?,...„1.' ?f x +? , �i t '+, s t r 0 0.2 0.4 0.6 0.8 1 1.2 RUNOFF COEFFICIENT (C) Landscaped Filter Basin PRELIMINARY DRAFT - SUBJECT TO REVISION Legend: , , .s„ Required Entries Only Name JLC Engineering Date 12/16/2011 Designed by Joe Castaneda County /City Case No Time Warner Company Project Number/Name Time Warner Project Site Drainage Area Number/Name Enter the area tributary to this feature At 0.123 acres Enter VaMP from Volume Worksheet for the project watershed Vamp 79 ft Type of Landscaped Filter Basin Design OO Side slopes required (parallel to parking spaces or adjacent to walkways) 0 No side slopes required (perpendicular to parking space or Planter Boxes) Landscaped Filter Basin Surface Area Depth of Soil Filter Media Layer d = 1.5 ft Top Width of LFB, excluding curb w 17.0 ft Total Effective Depth, d • d 0.3d (0.7 /w +0.5 d 0' d = [(0.3) x d + 0.5 Minimum Surface Area, A 2 Vamp (ft AM , r F �, ft2 A (ft) � _a dE (ft) Proposed Surface Area A= 272 ft Landscaped Filter Basin Properties Side Slopes in LFB z = 4 :1 Diameter of Underdrain 12 inches Longitudinal Slope of Site (3% maximum) 0.005 % 6" Check Dam Spacing At!: feet Describe Vegetation: Natural Grasses Riverside County Best Management Practice Design Handbook MAY 2010 DRAFT PRELIMINARY DRAFT- SUBJECT TO REVISION BMP Subarea Required Entries DRAFT Sand Filter Basin (SFB) - Design Procedure No. 12 Legend: { iitedjta' alirty Name: JLC Engineering Date: 12/14/2011 tdc ed by: Joe Castaneda County /City Case No.: Time Warne Design Volume A) Tributary area (BMP subarea) ATRIB = 0.163 ft B) Enter Design Volume (VBMP) from Worksheet 1 VBMP 546 ft SFB Geometry A) Basin side slopes (no steeper than 4:1) Slope no steeper than 4:1 z = 0 :1 M : laFts;.iN y, v° 3 -Aj-F A' C : B) Proposed basin depth (see Figure 1) p A . .}.,et A-= i 2, 5'2 L. 44' d = 4 ft C) Minimum bottom surface area of basin (As = V BMP/dB) l► _ $ =17 te 44 D) Minimum total depth required (includes freeboard, filter media d = is >' ,-'" ft and subdrains) t,/ , S Forebay A) Forebay volume (minimum 0.5% V p) Volume = *1` ft *bay depth (height of berm/splashwall. 1 foot min.) Depth = 1 ft C) Forebay surface area (minimum) kit .. 4'ra %'it 1t" .i4- ; 3 7 2, Area = 5 '' ft2 01G- D) Rectangular weir (notch), W= Q /(v *d) Quantity N= 1 Width (W) 4Ut!* ft (assumes 5 minute drawdown time, v =6 fps Recommend one weir on or ? If iini. in and forebay depth from above.) each side of forebay Filter Media A A) Description of filter media i s i 4" dia. Pert Pipe X Sand (ASTM C -33) 3" 18* min. ASTM C 33 sand Geotextile fabric Other (Clarify in "Notes" below) (120 GPM /SF) 8" min. Gravel Layer 1 " B) Media depth, df= 17 inches { -1 Media depth must be at el st 18 inches Section A -A Subdrains Diameter of perforated underdrain 6 inches • Spacing of underdrains (maximum 20 feet on center) 10 ft OK PRELIMINARY DRAFT - SUBJECT TO REVISION (JANUARY 2010) Water Quality Management Plan (WQMP) Time Warner Cable Server Building '� 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 • • December 15, 2011 Water Quality Management Plan (WQMP) Time Warner Cable Server Building Appendix H PHASE 1 ENVIRONMENTAL SITE ASSESSMENT — SUMMARY OF SITE REMEDIATION CONDUCTED AND USE RESTRICTIONS NOT CONDUCTED FOR THIS PROJECT • • December 15, 2011