Stormwater Quality Design Manual (May 2007) - City of Sacramento ...

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AcknowledgementsThis design manual was made possible by the combined efforts of manyprofessionals:Steering CommitteeSarah Amaya, City of FolsomDalia Fadl, Sacramento CountyBill Forrest, City of GaltSummer Christensen, Sacramento CountySherill Huun, City of SacramentoLeslie Nguyen-Pickett, City of Elk GroveChris Kraft, City of RosevilleKelye McKinney, City of RosevilleKerry Schmitz, Sacramento CountyTrung Trinh, City of GaltJoan Weber, City of RosevilleProject ConsultantsCarmel K. Brown, P.E. CKB Environmental Consulting, Inc. (Project Coordinator)Shannon Brown, ECORP Consulting (runoff reduction credit system and fact sheets)Robert Smith, P.E. and Mack Walker, P.E., Larry Walker Associates (selectedtreatment control fact sheets)Mark Kubik, P.E., West-Yost Associates (Technical Reviewer, Water QualityDetention Basin Fact Sheet and Sizing)Carlos Espana, P.E., G.E., Furgo West, Inc. (Geotechnical Engineering Review)N. Alison Tucker (technical writing and editing)Document Design and ProductionJoan Kodani, Sacramento CountyDarci Frank, City of Roseville (cover)Building Industry Association Stormwater CommitteeTom Gamette, Elliott HomesMike Sweeney, P.G., CPESC, CPSWQ, and John Youngdahl, P.E., YoungdahlConsulting GroupTim Crush, P.E. and Jennifer O’Neal, Wood Rodgers, Inc.Ardie Zahedani, North State Building Industry AssociationStormwater Quality Design Manual for the Sacramento and South Placer RegionsMay 2007v
Other Development Community Reviewers and ContributorsDevelopment Focus Group meetings were held in December 2006 and January 2007and comments were solicited on the December draft manual. Attendance lists fromthese meetings are available upon request. The public draft was published inFebruary 2007, followed by two public workshops in March 2007. A compilation ofall written comments received, and corresponding Steering Committee responses,can be found at: www.sacramentostormwater.org (new development).Agency Reviewers and ContributorsStaff from the various local and regional agencies reviewed and commented on theJuly 2006 Public Agency Review Draft Design Manual and various subsequentdrafts. In particular, the Design Manual Steering Committee would like toacknowledge the contributions of these agencies and individuals:Ken Menzer, Arborist, City of FolsomBob Rooker, Sacramento–Yolo Mosquito and Vector Control DistrictJim Edwards and Melenia Davis, County Sanitation District–1 (CSD–1)Stormwater Quality Design Manual for the Sacramento and South Placer Regionsvi May 2007
Page 1 and 2: Stormwater Quality Design Manualfor
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Page 5 and 6: Table of contentsOutdoor Work Areas
Page 7: Table of contentsSF-1.SF-2.SF-3.SF-
Page 11 and 12: 1 IntroductionPurposeThis Stormwate
Page 13 and 14: IntroductionIn July 2003, the permi
Page 15 and 16: IntroductionFor redevelopment proje
Page 17 and 18: Introduction• The Appendices prov
Page 19 and 20: 2 An Integrated Approach toEffectiv
Page 21 and 22: Integrated ApproachIt is also helpf
Page 23 and 24: Integrated ApproachPut landscaping
Page 25 and 26: Integrated Approachfactors will be
Page 27 and 28: Chapter 3Figure 3-1. Process for Ad
Page 29 and 30: Chapter 3runoff reduction first (ev
Page 31 and 32: Chapter 3As the name implies (and a
Page 33 and 34: Chapter 3Step 9: Establish Long Ter
Page 35 and 36: Chapter 4Source Control Fact Sheets
Page 37 and 38: Source Control Measure Fact SheetSt
Page 39 and 40: Source Control Measure Fact SheetFu
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Page 51 and 52: 5 Runoff Reduction Control Measures
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Page 55 and 56: Runoff Reduction Control Measures
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Runoff Reduction Control Measure Fa
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Runoff Reduction Fact SheetDisconne
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Chapter 6• What are pollutants of
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Chapter 6For projects using any of
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Runoff Treatment Control Measure Fa
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Design Data Summary SheetConstructe
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Technical RequirementsInfiltration
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Technical RequirementsSand FilterSa
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Technical RequirementsSand FilterDe
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Technical RequirementsSand FilterDe
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Technical RequirementsSand FilterSt
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Technical RequirementsSand FilterTa
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Technical RequirementsSand FilterLo
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Technical RequirementsVegetated Swa
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Glossaryexposure of construction ma
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GlossaryLow Impact Development (LID
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GlossaryRegional Stormwater Quality
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Appendix ASubmittal RequirementsThe
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Sacramento County Supplemental Appl
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Example Post Construction Stormwate
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Typically maintenance agreements an
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Example Maintenance Covenant(Sacram
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Device in accordance with the maint
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[attach]DECLARANT’S ACKNOWLEGEMEN
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Recorded at the request of:CITY OF
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9. The obligations herein undertake
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EXHIBIT B[Map/Illustration]
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City of FolsomThe City of Folsom ow
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Appendix D-1: Residential Sites: Ru
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Form D-1d: Alternative Driveway Des
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Form D-2a: Disconnected Pavement Wo
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Appendix D-3Runoff Reduction Credit
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These tables refer to runoff reduct
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Mature TreeShape Canopy (dia.) Heig
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Appendix D4LID Credits Background R
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unoff from the driveway by 60% whil
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The designer must determine how man
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Or the ASCE-WEF method (Sacramento)
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Table 3 - Multipliers Based on Rati
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Using the Effective Area Managed in
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SMRC, The Stormwater Manager’s Re
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Flow-based control measure design s
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4. Apply the Rational Formula to ca
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5. Enter the capture curve selected
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1.201.000.80STORAGE (in)0.600.4024-
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1.201.000.80STORAGE (in)0.600.4048
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Subject: VEGETATED SWALE EXAMPLEPLA
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PART II:Routing Excess Runoff throu
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4. Design the OutletThe outlet shou
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Exhibit 1Water Quality Orifice Outl
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3. Calculate Planter Surface Area A
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• Bottom slopes of 0.01 to 0.05%
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Appendix HDrainage Design and Storm
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