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

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Typically maintenance agreements and covenants are recorded with the deed for the property andfollow property ownership. The agreements generally include provisions for the permittingagency to recover costs for maintenance in the event that the property owner fails to fulfill theirobligations. Check with the local permitting agency about the timing for execution of theagreement.Recommended Inspection and Maintenance ProceduresA stand-alone table listing recommended inspection and maintenance procedures is provided atthe end of the fact sheet for each of the above control measures. The intent is for the applicabletable(s) to be incorporated into the maintenance agreement for the project with amendments asneeded by the project designer and property owner to pertain to the unique project conditions. Itis the responsibility of the project designer to inform the permitting agency of the complete set ofnecessary inspection and maintenance requirements that will provide long-term continuedperformance and sustainability of the measures.Reconstruction or Replacement of Failed FacilitiesIn addition to inspecting and performing maintenance on the stormwater quality controlmeasure(s), the property owner will be required by the maintenance agreement or permit toreconstruct or replace the measure when it ceases to function properly. For informationalpurposes, the table on the next page summarizes projected life span information for the variousstormwater quality control measures, based on available literature.Example Maintenance AgreementsEach agency will likely use a different format for the maintenance verification. For examplepurposes, two standard maintenance covenants/agreements are provided at the end of thisappendix, for the County of Sacramento and City of Sacramento, respectively. The contents ofeach form are basically the same.Resources for Additional GuidanceMaintaining Your Stormwater Management Facility: Homeowner Handbook, City of Portland,OR. http://www.portlandonline.com/shared/cfm/image.cfm?id=65926Stormwater Quality Design Manual for the Sacramento and South Placer RegionsMay 2007 B–2
Expected Life for Selected Stormwater Quality Control Measures (Based onPublished Literature)Control MeasureAverageLifeExpectancy 1Runoff Reduction (Chapter 5)Source/Reference20 years Maintaining Your Stormwater Management Facility:Porous Pavement 2 Homeowner Handbook, City of Portland, OR.http://www.portlandonline.com/shared/cfm/image.cfm?id=6592630 years http://www.seattle.gov/dpd/static/GF_RainGardens_1_37427_DPDP_019875.pdfGreen Roof10–40 years http://www.ecoroofsystems.com/cost_files/c_cost.htmlTreatment Control (Chapter 6)Constructed WetlandDetention BasinWater QualityDetention Basin20 years http://www.epa.gov/superfund/programs/aml/tech/cuwetlands.pdf25 years andmorehttp://www.abe.msstate.edu/csd/p-dm/all-chapters/chapter4/chapter4/det-basin.pdfInfiltration Basin NA Information to be provided in a future updateInfiltration Trench30 years http://www.portlandonline.com/shared/cfm/image.cfm?id=659265–15 years http://www.epa.gov/owmitnet/mtb/infltrenc.pdfSand Filter 5 - 20 years http://www.fhwa.dot.gov/environment/ultraurb/3fs7.htmStormwater Planter NA Information to be provided in a future updateVegetated Filter StripVegetated SwaleNA: Not available50 years http://www.portlandonline.com/shared/cfm/image.cfm?id=6592620 years http://www.highwaybmp.dfwinfo.com/FHWA_PDF/Grassed%20Swale.pdfno known http://www.epa.gov/nrmrl/pubs/600r04121/600r04121asect6.pdflimit1 Information is based on cited references/sources and assuming proper design, installation & long termmaintenance. Life expectancy may vary depending on the design. The studies cited in this table may nothave used the same design criteria as specified in this design manual.2 Expected life estimated to increase with increased pavement depth.Stormwater Quality Design Manual for the Sacramento and South Placer RegionsMay 2007 B–3
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Stormwater Quality Design Manualfor
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Stormwater Quality Design Manual wa
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Table of contentsOutdoor Work Areas
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Table of contentsSF-1.SF-2.SF-3.SF-
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Other Development Community Reviewe
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1 IntroductionPurposeThis Stormwate
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IntroductionIn July 2003, the permi
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IntroductionFor redevelopment proje
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Introduction• The Appendices prov
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2 An Integrated Approach toEffectiv
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Integrated ApproachIt is also helpf
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Integrated ApproachPut landscaping
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Integrated Approachfactors will be
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Chapter 3Figure 3-1. Process for Ad
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Chapter 3runoff reduction first (ev
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Chapter 3As the name implies (and a
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Chapter 3Step 9: Establish Long Ter
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Chapter 4Source Control Fact Sheets
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Source Control Measure Fact SheetSt
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Source Control Measure Fact SheetFu
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Source Control Measure Fact SheetLo
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Source Control Measure Fact SheetOu
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Source Control Measure Fact SheetOu
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Source Control Measure Fact SheetWa
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Source Control Measure Fact SheetWa
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5 Runoff Reduction Control Measures
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Runoff Reduction Control MeasuresDe
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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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Page 153 and 154: Runoff Treatment Control Measure Fa
Page 157 and 158: Technical RequirementsSand FilterSa
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Page 165 and 166: Technical RequirementsSand FilterTa
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Page 177 and 178: Technical RequirementsVegetated Swa
Page 191 and 192: Glossaryexposure of construction ma
Page 193 and 194: GlossaryLow Impact Development (LID
Page 195 and 196: GlossaryRegional Stormwater Quality
Page 197 and 198: Appendix ASubmittal RequirementsThe
Page 199 and 200: Sacramento County Supplemental Appl
Page 201: Example Post Construction Stormwate
Page 206 and 207: Example Maintenance Covenant(Sacram
Page 208 and 209: Device in accordance with the maint
Page 210 and 211: [attach]DECLARANT’S ACKNOWLEGEMEN
Page 212 and 213: Recorded at the request of:CITY OF
Page 214 and 215: 9. The obligations herein undertake
Page 216 and 217: EXHIBIT B[Map/Illustration]
Page 218 and 219: City of FolsomThe City of Folsom ow
Page 220 and 221: Appendix D-1: Residential Sites: Ru
Page 222: Form D-1d: Alternative Driveway Des
Page 225 and 226: Form D-2a: Disconnected Pavement Wo
Page 228 and 229: Appendix D-3Runoff Reduction Credit
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Page 232 and 233: Mature TreeShape Canopy (dia.) Heig
Page 234 and 235: Appendix D4LID Credits Background R
Page 236 and 237: unoff from the driveway by 60% whil
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Page 240 and 241: Or the ASCE-WEF method (Sacramento)
Page 242 and 243: Table 3 - Multipliers Based on Rati
Page 244 and 245: Using the Effective Area Managed in
Page 246 and 247: SMRC, The Stormwater Manager’s Re
Page 248 and 249: Flow-based control measure design s
Page 250 and 251: 4. Apply the Rational Formula to ca
Page 252 and 253: 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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