BEsT MANAGEMENT PRACTICEs HANDbooK - Tahoe BMP

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CHAPTER 4: BMP TOOLKIT4.1 HYDROLOGIC SOURCE CONTROLThe term hydrologic source control is used in this Handbook to refer to BestManagement Practices (BMPs) that limit or control the amount of stormwaterrunoff generated from a developed site by enhancing on-site infiltration andstorage. Hydrologic source control BMPs are intended to mitigate for the lossof vegetated cover and other natural storage areas during development.Reducing the amount of runoff generated by a developed site is one of the mosteffective BMPs for removing nutrients and fine sediments from runoff. TheseBMPs also tend to be the most cost effective BMP for removing thesepollutants when compared to stormwater treatment BMPs and in someinstallations also provide the added benefits of flood control and reducingimpacts to receiving streams.The primary reduction comes from the direct relationship of runoff volume topollutant loading (Pollutant Load = Runoff Volume x PollutantConcentration). This reduction is accomplished through the installation ofinfiltration BMPs which direct stormwater into the ground. Infiltration BMPsfor parcels in the Lake Tahoe Region are generally designed to accommodatethe volume of runoff generated by on-site impervious surfaces during a 20-yr/1-hr storm (about 1 inch in 1 hour). Capturing this design storm removes the“first flush” of pollutants and reduces the volume of stormwater that entersLake Tahoe and its tributaries. Sites that have high pollutant loading, such ascommercial or industrial sites or sites with ground or surface waters willrequire pretreatment BMPs prior to infiltration.These BMPs apply across all project scales and range in complexity frominfiltration trenches under eaves on a residential home, to large-scale subsurfaceinfiltration systems installed below pavement in a commercial parking lot, toinfiltration basins for jurisdictional public works projects.TRPA BMP HandbookCHAPTER 4: BMP Toolkit2012 Page 1
CHAPTER 4: BMP ToolkitTRPA BMP HandbookPage 2 2012
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PREFACEThe Tahoe Regional Planning
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TABLE OF CONTENTSPREFACE...........
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3.5.5 Stormwater Treatment ........
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6.3 Projects 1 to 5 Acres and all C
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8.10.5 Maintenance ................
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Table 8-4: Federal, State and Regio
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Figure 4.3-i: Vegetated Swale .....
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INTRODUCTIONPURPOSE AND USERS OF TH
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Lake Tahoe’s world renowned blue
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Urbanization in the Lake Tahoe wate
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50 percent of the light scattering
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Figure I-c: Impervious Cover versus
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Disconnected impervious areasdrain
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POLLUTANT EFFECT URBAN SOURCES ASSO
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BEST MANAGEMENT PRACTICESHistorical
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Table I-2: Differences in BMP Retro
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CHAPTER 1: URBAN HYDROLOGY1.1 PURPO
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Figure 1-a: Runoff ProcessesTRPA BM
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Although many urbanized areas face
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watersheds to make the necessary es
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Pollutant load estimates are typica
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differ from the following recommend
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Figure 1-b: Hydrologic Processes an
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1.3.3.2 NRCS BMP CALCULATION SPREAD
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1.3.3.3 RATIONAL METHODMODEL SUMMAR
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1.3.3.4 LOAD REDUCTION PLANNING TOO
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in HMS may be event-based or contin
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1.3.3.6 POLLUTANT LOAD REDUCTION MO
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AVAILABILITY AND SUPPORTING DOCUMEN
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TYPICAL LEVEL OF EFFORTHSPF and LSP
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few days to a week of time to revie
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USACE studies recommended use of th
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during the initial site visit, or c
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Figure 2-a: Soil Horizons• Depth
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Evidence of compacted and disturbed
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UNMAPPED ROCK OUTCROPS, STEEP SLOPE
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The primary pollutants of concern o
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On the map use an arrow to delineat
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2.2.3 ADDITIONAL DATA GATHERINGAfte
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and allowable uses. Baseline Land C
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topographic survey will be required
Page 89: Table 2-3: Basis of Capability Clas
Page 92 and 93: Keep your property lean, clean,and
Page 94 and 95: treatment. This will reduce the mai
Page 96 and 97: ponds, wetlands, lakes, manmade cha
Page 98 and 99: 2.3.3.2 SOILS HYDROLOGIC REPORTThe
Page 100 and 101: CHAPTER 3: PERMANENT BMP PLANNINGAN
Page 102 and 103: STORMWATER TREATMENTRepresents BMPs
Page 104 and 105: Table 3-1: Waste Management and Mat
Page 106 and 107: D. STABILIZE STEEP DISTURBED SLOPES
Page 108 and 109: This infiltration trench collects s
Page 110 and 111: 3.5 PROJECTS 1 TO 5 ACRES AND ALL C
Page 112 and 113: This Page Blank.TRPA BMP HandbookCH
Page 114 and 115: unnecessary turf areas and replace
Page 116 and 117: Table 3-5: Waste Management and Mat
Page 118 and 119: 3.5.2.3 SOIL STABILIZATIONA. RESTOR
Page 120 and 121: Left: Dripline erosion below a deck
Page 122 and 123: Pervious concrete parking pad locat
Page 124 and 125: 3.5.5 STORMWATER TREATMENT3.5.5.1 M
Page 126 and 127: 3.6.1.1 JURISDICTIONThese projects
Page 128 and 129: to perform required inspection and
Page 130 and 131: 3.8.2.4 SHARED ACCESS AND EASEMENTS
Page 132 and 133: 3.8.2.8 STREAM ENVIRONMENT ZONES (S
Page 134 and 135: Sediment versus erosion:Suspended s
Page 136 and 137: CONTENTSCHAPTER 4: BMP TOOLKIT ....
Page 140 and 141: 4.1.1.1 PERVIOUS PAVEMENTAlternativ
Page 142 and 143: • Tree canopy overhead can decrea
Page 144 and 145: ate determined at the time of insta
Page 146 and 147: Figure 4.1-a: Pervious ConcreteTRPA
Page 148 and 149: 4.1.1.2 INFILTRATION BASINAlternati
Page 150 and 151: groundwater, depths to restrictive
Page 152 and 153: Very few performance monitoring stu
Page 154 and 155: INSPECTION AND MAINTENANCE ACTIVITI
Page 156 and 157: 4.1.1.3 INFILTRATION TRENCHAlternat
Page 158 and 159: • Consult the NRCS Tahoe Basin So
Page 160 and 161: • Alternative Method: Excavate th
Page 162 and 163: Figure 4.1-c: Infiltration TrenchTR
Page 164 and 165: Figure 4.1-e: Roof Dripline Planter
Page 166 and 167: 4.1.1.4 SUBSURFACE INFILTRATION SYS
Page 168: percent void space compared to 40 p
Page 171 and 172: • Ensure the surrounding surface
Page 174 and 175: 4.1.1.5 RAIN BARREL AND CISTERNAlte
Page 176 and 177: • Position the rain barrel or cis
Page 178 and 179: 4.1.1.6 RAIN GARDENAlternative Name
Page 180 and 181: • To manage high flows, design a
Page 182 and 183: 4.1.1.7 FILTER STRIPAlternative Nam
Page 184 and 185: • The top of the vegetated filter
Page 186 and 187: INSPECTION AND MAINTENANCE ACTIVITI
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Figure 4.1-i: Vegetated Filter Stri
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LIST OF FIGURESFigure 4.2-a: Slope
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Chapter 4: BMP ToolkitTRPA BMP Hand
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• Obtain and use a road abrasive
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• Mechanical broom sweepers may a
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EFFECTIVENESS CONSIDERATIONSA signi
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for dry basins or infiltration basi
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• For unpaved snow storage areas
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Figure 4.2-a: Slope Stabilization A
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Disadvantages• Not always success
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• Bind together long live branch
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Brush Layering and MattingBrush lay
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Advantages• Reduces the erosion p
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Table 4.2-1: Terracing Inspection a
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Disadvantages• Can be complicated
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• Revegetate the backfilled bench
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Figure 4.2-d: Timber Retaining Wall
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Advantages• Versatile and applica
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Table 4.2-3: Riprap Inspection and
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educe the concentration of runoff,
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Figure 4.2-g: Slope Bottom BenchFig
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• Contour Furrows - relatively de
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APPLICABILITYAll roads, driveways,
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Stormwater runoff from a paved park
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Figure 4.2-k: Grading for Sheet Flo
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INORGANIC MULCH:• Areas where org
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• Stockpile and use existing orga
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The surface under the raised decksh
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Figure 4.2-l: Rock Armor - Elevated
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Clustered boulders used for parking
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• Helps to protect wildlife.• H
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EFFECTIVENESS CONSIDERATIONSA prope
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Improper storage of hazardous mater
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• Try to use the entire product b
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facilities must be equipped with ap
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• Dispose of it properly• Be a
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Disadvantages• Additional resourc
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• All hay, cubed hay, straw, mulc
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• Sanitary sewer regulations gene
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APPLICABILITYAll vehicles, includin
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• Do not perform other vehicle or
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LIST OF FIGURESFigure 4.3-a: Curb B
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APPLICABILITY• Culverts are appli
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deterioration. The inspection crew
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APPLICABILITY• Curb and gutters a
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INSTALLATION CONSIDERATIONS• Inst
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Figure 4.3-b: Rolled CurbChapter 4:
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Advantages• Prevents the discharg
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Table 4.3-2: Storm Drain Inspection
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Advantages• Prevents scour that m
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Figure 4.3-c: Outlet ProtectionChap
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• The structure can be designed t
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INSTALLATION CONSIDERATIONS• Disc
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Advantages• Assists in the contro
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Figure 4.3-e: Slotted Channel Drain
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Advantages• May be less expensive
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Table 4.3-5: A/C Swale Inspection a
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• Prevents property damage, slope
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Figure 4.3-g: Subsurface DrainChapt
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abrasives applied during the winter
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Table 4.3-7: Rock Lined and Vegetat
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Figure 4.3-i: Vegetated SwaleChapte
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Check dams installed in water sprea
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• Design check dams perpendicular
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CONTENTS4.4 Stormwater Treatment ..
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4.4 STORMWATER TREATMENTThe primary
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4.4.1.1 WET BASINAlternative Names:
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• Surcharge storage above the wet
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Table 4.4-1: Wet Basin Inspection a
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Figure 4.4-a: Wet Basin (Concept Dr
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4.4.1.2 BIOSWALEAlternative Names:
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• Consider incorporating trees or
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Figure 4.4-b: Bioswale (Linear Basi
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4.4.1.3 DRY BASINAlternative Names:
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• Drainage design standards for t
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INSPECTION AND MAINTENANCE ACTIVITI
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Figure 4.4-c: Detention BasinTRPA B
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4.4.2 FLOW THROUGH TREATMENTFlow-th
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4.4.2.1 DROP INLET INSERTAlternativ
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INSTALLATION CONSIDERATIONS• Refe
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4.4.2.2 TRASH RACKAlternate Names:
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4.4.2.3 BAFFLED VAULTAlternative Na
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• Ensure that site conditions all
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4.4.2.4 HYDRODYNAMIC SEPARATORAlter
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• Most units are designed to be c
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4.4.2.5 MEDIA FILTERAlternate Names
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Cartridge Filter• Cartridge filte
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• Vent the system as for undergro
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4.4.2.6 SEDIMENT TRAPAlternative Na
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INSPECTION AND MAINTENANCE• Regul
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Figure 4.4-e: Sediment TrapTRPA BMP
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CONTENTS4.5 Temporary BMPs for Cons
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4.5 TEMPORARY BMPS FOR CONSTRUCTION
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concrete washouts and stockpiles sh
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4.5.1.1 CONSTRUCTION PLANNING AND S
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• Measures to minimize the potent
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4.5.1.2 CONSTRUCTION BOUNDARY FENCI
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Figure 4.5-a: Construction Boundary
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4.5.1.3 DEWATERINGDESCRIPTIONDewate
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Figure 4.5-b: DewateringTRPA BMP Ha
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• Use this settled water to fill
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4.5.1.4 CLEAN WATER DIVERSIONAltern
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• Avoid disturbing aquatic specie
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• Pipe slope drain: A rigid pipe,
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Stream Isolation Techniques:• Tur
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Figure 4.5-f: Water DiversionTRPA B
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4.5.1.5 VEGETATION PROTECTIONAltern
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• Growing Space: Provide spacing
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Figure 4.5-g: Vegetation Protection
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4.5.1.6 TEMPORARY SANITATION FACILI
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4.5.1.7 DUST CONTROLAlternate Names
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• Blanket with geotextiles or veg
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4.5.1.8 VEHICLE INGRESS EGRESS MANA
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• If possible, re-use swept or va
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4.5.1.9 WINTERIZATIONDESCRIPTIONBet
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INSPECTION AND MAINTENANCEEnsure th
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4.5.1.10 CONSTRUCTION STAGINGAltern
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4.5.1.11 MATERIAL HANDLING STORAGE
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• Ensure that current Material Sa
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4.5.1.12 TOPSOIL SALVAGEAlternative
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• If topsoil will not be used for
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4.5.1.13 CONCRETE/BENTONITE MANAGEM
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Figure 4.5-i: Concrete Washout Stat
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4.5.1.14 STOCKPILE MANAGEMENTAltern
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Figure 4.5-j: Stockpile ManagementT
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4.5.2 EROSION AND SEDIMENT CONTROLR
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4.5.2.1 SWEEPINGDESCRIPTIONDuring c
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4.5.2.2 DRAIN INLET PROTECTIONAlter
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inches. Take care to ensure that no
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Figure 4.5-k: Drain Inlet Protectio
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4.5.2.3 FIBER ROLLAlternative Names
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• Adjust spacing of fiber rolls a
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Figure 4.5-l: Fiber RollsTRPA BMP H
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4.5.2.4 SILT FENCEAlternative Names
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• Turn the fabric uphill at the e
Page 494 and 495:
Figure 4.5-m: Silt FenceTRPA BMP Ha
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4.5.2.5 EROSION CONTROL BLANKET SYS
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structures mark the boundaries of t
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Figure 4.5-p: Anchoring Geotextiles
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4.5.2.6 HYDROMULCH, TACKIFIER, AND
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INSPECTION AND MAINTENANCE• Hydro
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5.2 SOILSoil is a complex living sy
Page 508 and 509:
Tilling green wood chips intothe so
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areas such as SEZs and in shorezone
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Large boulders provide permanent ve
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To address this TRPA’s Regional P
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to apply ½ inch of water. Water yo
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Pesticides can be degraded by sunli
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5.3.2.5 FIRE DEFENSIBLE SPACEFire d
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etween them. For example, shrubs wi
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5.4 PROJECT SCALE REQUIREMENTSSoil
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5.4.1.5 PROJECT INSTALLATIONA. CONT
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percent vegetative cover, soil surf
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TRPA Revegetation Plan TemplateSoil
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(c) GRADING AND SLOPE SHAPINGDescri
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TRPA Revegetation Plan ExampleSoil
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• All machinery must be clean bef
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Common NameScientific NameScotchbro
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during dry weather. All debris, roo
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substantially different that the pe
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TRPA BMP HandbookCHAPTER 5: Soil an
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Fertilizer Management PlanProject N
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IV. MONITORINGSurface and groundwat
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I. PROJECT AND SITE DESCRIPTIONGold
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Table 5-1: Description of Revegetat
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SITE TYPE RECOMMENDED SPECIES LISTS
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SITE TYPE RECOMMENDED SPECIES LISTW
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CHAPTER 5: Soil and Vegetation Mana
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TRPA APPROVED PLANT SPECIES ATTRIBU
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TRPA APPROVED PLANT SPECIES ATTRIBU
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CHAPTER 5: Soil and Vegetation Mana
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• Section 6.2 describes methods f
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equirements. At a minimum, training
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Vactor equipment removes sediment a
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Industrial Properties, Marinas, and
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• Rinse the rock with hose water
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EXAMPLE INSPECTION AND MAINTENANCE
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MONITORING PLAN TEMPLATE1. TITLE PA
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MONITORING, INSPECTION, ANDMAINTENA
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Sample Site123 Main StreetSouth Lak
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3. MONITORINGIn 2011, South Lake Ta
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ATTACHMENT BWATER QUALITY DATA
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ATTACHMENT DINSPECTION AND MAINTENC
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• Discharge of stormwater from in
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PAVING SINGLE FAMILY RESIDENTIAL PR
Page 598 and 599:
TRPA Shorezone permit (www.trpa.org
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CHAPTER 8: SHOREZONE PROTECTIVESTRU
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technical guidance on structural an
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Pope has developed a shorezone miti
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ADVANTAGES• Protect parcel develo
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Table 8-3: Categorical Classificati
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generate observable changes in the
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Table 8-5: The General Geomorphic C
Page 614 and 615:
8.1.8.2 TOLERANCE DISTRICT AND BACK
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Figure 8-e: Option 2—Backshore De
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Scenic Resources and project compli
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8.2 BULKHEADS AND LAKE WALLS8.2.1 O
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oth the beach immediately fronting
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Like all BMPs, bulkheads and lake w
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For a bulkhead located such that th
Page 628 and 629:
Figure 8-i: Typical Lake Wall (Grav
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Table 8-9: Advantages and Disadvant
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maintains its position under wave s
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8.3.4 INSTALLATIONAs with bulkheads
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Table 8-11: Advantages and Disadvan
Page 638 and 639:
V t ≥ 5R c2(Equation 4.1)Where:Vt
Page 640 and 641:
8.5 BEACH NOURISHMENT AND REPLENISH
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of not being able to protect the ba
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• The material must be washed to
Page 646 and 647:
nourishment will be determined by m
Page 648 and 649:
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8.7 BREAKWATERS8.7.1 OVERVIEWBreakw
Page 652 and 653:
The procedure for determining armor
Page 654 and 655:
8.8 SHOREZONE VEGETATION8.8.1 OVERV
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vegetation. Protecting a tree from
Page 658 and 659:
Overall, dredging can be either a p
Page 660 and 661:
The Pneuma pump is a piece of dredg
Page 662 and 663:
nature of the project and the poten
Page 664 and 665:
8.10 TURBIDITY CURTAINS8.10.1 OVERV
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weights or connected firmly to sand
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Figure 8-o: Turbidity Curtain Desig
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Aquatic invasive species (AIS) also
Page 672 and 673:
tanks into a sewage retention and/o
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• A common problem with recreatio
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8.12 BOAT RAMP CONSTRUCTION AND VEH
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amp at the change of grade. A V-gro
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Figure 8-p: Boat Ramp DesignTRPA BM
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Table 8-22: Overview of Geotechnica
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8.14 SHOREZONE PROTECTIVE STRUCTURE
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8.14.2 ADDITIONAL CONSIDERATIONS FO
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some designated boundary or sphere
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spawning grounds and juvenile nurse
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Marine Science, School of Geoscienc
Page 696 and 697:
Osborne, R.H., et. Al. (1985). Sedi
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8.16 APPENDICES8.16.1 DESIGN CALCUL
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Figure 8-r defines the primary wave
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8.16.1.2 WAVE RUN-UP FORMULA FOR BA
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• Use Equation 16.10 to calculate
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Figure 8-u: Design Wave CasesTRPA B
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Figure 8-v: Wave Setup and Run-Up f
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Alternative methods of wave calcula
Page 712 and 713:
GLOSSARYAccretionMay be either a na
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eaches have no berm, others have se
Page 716 and 717:
DensityMass (in kg) per unit of vol
Page 718 and 719:
Fire Defensible SpaceRefers to the
Page 720 and 721:
Common terms related to land covera
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PermeabilityThe property of a bulk
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ScourRemoval of underwater material
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SlopeThe degree of inclination to t
Page 728 and 729:
Technical Advisory Committee (TAC)C
Page 730 and 731:
ACRONYMSACES - Automated Coastal En
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NPS - Nonpoint SourceNRCS - Natural
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BEsT MANAGEMENT PRACTICEs HANDbooK - Tahoe BMP

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