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

More documents

Recommendations

Info

Source Control Measure Fact SheetWash AreasDesignFeatureRequirementVehicle and Large Equipment Wash AreasSize andLocation-PavingLocate the wash area such that access is from paved areas only (to prevent tracking of sediment).Size vehicle and equipment wash areas to extend at least 4 ft. in all directions around the largestpiece of equipment/vehicle to be washed. For vehicle wash areas where vehicle size is unknown, sizethe wash area to be at least 25 ft. long and 15 ft. wide.Pave the wash area with asphalt or concrete.Cover Cover the entire wash area with a roof or other type of approved permanent canopy. For covers 10feet high or less, extend at least 3 feet beyond the perimeter of the hydraulically isolated wash area.For covers higher than 10 feet, extend at least 5 feet beyond the wash area.For new development in infill areas, or for redevelopment projects where there is no space to add acovered wash area, or for airport facilities, a diversion valve is required (see the Grading/Drainagesection of this table). (Note: new facilities servicing oversize vehicles [bus, fire] can provide coveredbuilding or structure and redevelopment of such facilities should consider addition of diversion valve).Grading/Drainage –GeneralHydraulically isolate the wash area to contain the wash water and prevent runoff from leaving thearea and run-on from surrounding areas from entering the wash area. Use grade breaks, berms, orinterceptor drains (around the perimeter or in the entrance and exit zones) to accomplish this.Drainage – Connect the covered wash area to an appropriate pretreatment device (e.g., oil/water separator), thenCovered areas to the sanitary sewer. Alternatively, install a zero-discharge water recycling system. For any of theseoptions, first obtain approval from the applicable permitting agency.Drainage -Cover notfeasibleTrashReceptacleSignageWhen a cover is not feasible (see “cover” discussion earlier in this table), connect the hydraulicallyisolated area to the storm drain system and equip the drainage system with a diversion valve that cantemporarily redirect polluted wash water to the sanitary sewer when washing activities are takingplace. Various types of actuated valve configurations have been used in the Sacramento area fortruck washing areas and children’s water parks. Diversion valves could be triggered when the watersupply faucet is turned on or by a rain gage. Check with the local permitting agency early in theplanning process before proceeding with design of this type of system.Locate a covered garbage receptacle within or immediately adjacent to a vehicle wash area toprovide a convenient means for people to dispose of trash and keep the materials out of the stormdrain system.Post signs that clearly identify the facility’s intended use for employees and tenants.Post signs that prohibit:• the use of cleaning products that contain hazardous substances (hydrofluoric acid, muriatic acid,sodium hydroxide, bleach, etc.) and can turn wastewater into hazardous waste.• the use of specific cleaning products incompatible with any pre-treatment device (check with localpermitting agency)• dumping of vehicle fluids in wash areas• engine/car repair in the wash area• dumping in storm drainsOperation and MaintenanceThe design features required by this fact sheet need to be maintained and properly operated. In addition,actuated valve installations may be subject to inspections by the local sanitary sewer agency.Stormwater Quality Design Manual for the Sacramento and South Placer RegionsWA-2 May 2007
Source Control Measure Fact SheetWaste Management AreasPurposeThis fact sheet specifies how to design waste andrecycling storage areas so that they aren’t sources ofpollutants to the storm drainage system and receivingwaters. A properly designed waste/recycling storagearea keeps rain, runoff, and other site water fromleaching away pollutants; minimizes the chance ofspills and leaks; and prevents any spilled or leakedwastes from entering the storm drainage system.Potential pollutants from waste includefats/oils/greases (from food), particulates, organicmatter, toxic chemicals, and more.Photo: City of FolsomApplicabilityRefer to Table 4-1 regarding the project land use types that need to comply with this fact sheet. Thedesign requirements provided in this fact sheet are primarily intended for new development. If applied tosignificant redevelopment, the requirements would only apply in the case of complete redesign of theportion of the facility involving the waste management/trash enclosure area(s).Design RequirementsTo protect water quality, design waste and recycling storage areas as explained in Table WM-1. Designrequirements in this fact sheet are intended to supplement (not supercede) those in other codes (such asthe Building, Fire, and Zoning Codes and the hazardous waste requirements in Title 22, California Codeof Regulations, as applicable). Discuss any potential conflicts with the local permitting agency early inthe planning process before proceeding with design. In addition, check with the appropriate waste haulerregarding design or access requirements.Operation and MaintenanceThe design features required by this fact sheet need tobe maintained and properly operated. This includesregular maintenance of the grease interceptor andhandling and disposal of materials which accumulatein the interceptor, and maintenance of covers andsanitary sewer connections, if applicable.Covered Storage for Waste and Recycling Bins andCompactor, Pleasanton, CA. Photo: CKB Environmental.Stormwater Quality Design Manual for the Sacramento and South Placer RegionsMay 2007WM-1
Page 1 and 2: Stormwater Quality Design Manualfor
Page 3 and 4: Stormwater Quality Design Manual wa
Page 5 and 6: Table of contentsOutdoor Work Areas
Page 7 and 8: Table of contentsSF-1.SF-2.SF-3.SF-
Page 9 and 10: Other Development Community Reviewe
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
Page 41 and 42: Source Control Measure Fact SheetLo
Page 43 and 44: Source Control Measure Fact SheetOu
Page 45 and 46: Source Control Measure Fact SheetOu
Page 47: Source Control Measure Fact SheetWa
Page 51 and 52: 5 Runoff Reduction Control Measures
Page 53 and 54: Runoff Reduction Control MeasuresDe
Page 55 and 56: Runoff Reduction Control Measures
Page 57 and 58: Runoff Reduction Control Measure Fa
Page 71 and 72: Runoff Reduction Fact SheetDisconne
Page 99 and 100:
Runoff Reduction Control Measure Fa
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Chapter 6• What are pollutants of
Page 109 and 110:
Chapter 6For projects using any of
Page 111 and 112:
Runoff Treatment Control Measure Fa
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Design Data Summary SheetConstructe
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Technical RequirementsInfiltration
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Technical RequirementsSand FilterSa
Page 159 and 160:
Technical RequirementsSand FilterDe
Page 161 and 162:
Technical RequirementsSand FilterDe
Page 163 and 164:
Technical RequirementsSand FilterSt
Page 165 and 166:
Technical RequirementsSand FilterTa
Page 167 and 168:
Technical RequirementsSand FilterLo
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Technical RequirementsVegetated Swa
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190:
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 204 and 205:
Typically maintenance agreements an
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
Page 230 and 231:
These tables refer to runoff reduct
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
Page 238 and 239:
The designer must determine how man
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
Page 254 and 255:
1.201.000.80STORAGE (in)0.600.4024-
Page 256 and 257:
1.201.000.80STORAGE (in)0.600.4048
Page 258 and 259:
Subject: VEGETATED SWALE EXAMPLEPLA
Page 260:
PART II:Routing Excess Runoff throu
Page 263 and 264:
4. Design the OutletThe outlet shou
Page 265 and 266:
Exhibit 1Water Quality Orifice Outl
Page 267 and 268:
3. Calculate Planter Surface Area A
Page 269 and 270:
• Bottom slopes of 0.01 to 0.05%
Page 271:
Appendix HDrainage Design and Storm
show all

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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?