Storm Water Pollution Prevention Plan (SWPPP) - the City of Lompoc!

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EPA NPDES - Welcome to the Lower Erosivity Index Calculatorhttp://cfpub.epa.gov/npdes/stormwater/LEW/erosivity_index_result.cfmPage 1 of 17/6/2010National Pollutant Discharge Elimination System (NPDES)Recent Additions | Contact Us | Print Version Search NPDES:EPA Home > OW Home > OWM Home > NPDES Home >Basic InformationMunicipal MS4sConstruction ActivitiesIndustrial ActivitiesRoad-Related MS4sMenu of BMPsGreen InfrastructureUrban BMP ToolStormwater HomeNPDES Topics Alphabetical Index Glossary About NPDESRainfall Erosivity Factor Calculator for SmallConstruction SitesFacility InformationFacility Name: Lompoc Well #11Start Date: 09/07/2010End Date: 05/10/2011Latitude: 34.6431Longitutde: -120.4332Erosivity Index Calculator ResultsAN EROSIVITY INDEX VALUE OF 24.62 HAS BEEN DETERMINED FOR THE CONSTRUCTIONPERIOD OF 09/07/2010 - 05/10/2011.StormwaterInformationRecent AdditionsFAQsPublicationsRegulationsTraining & MeetingsLinksContactsA rainfall erosivity factor of 5.0 or greater has been calculated for your site and period ofconstruction. You do not qualify for a waiver from NPDES permitting requirements.Start OverThe documents on thissite are best viewedwith Acrobat 8.0Office of Water | Office of Wastewater Management | Disclaimer | Search EPAEPA Home | Privacy and Security Notice | Contact UsLast updated on August 07, 2009 3:37 PMURL:http://cfpub.epa.gov/npdes/stormwater/LEW/erosivity_index_result.cfm
12Sediment Risk Factor WorksheetA) R FactorA B CEntry345678Analyses of data indicated that when factors other than rainfall are held constant, soil loss is directly proportional to arainfall factor composed of total storm kinetic energy (E) times the maximum 30-min intensity (I30) (Wischmeier andSmith, 1958). The numerical value of R is the average annual sum of EI30 for storm events during a rainfall record ofat least 22 years. "Isoerodent" maps were developed based on R values calculated for more than 1000 locations in theWestern U.S. Refer to the link below to determine the R factor for the project site.http://cfpub.epa.gov/npdes/stormwater/LEW/lewCalculator.cfmB) K Factor (weighted average, by area, for all site soils)R Factor ValueThe soil-erodibility factor K represents: (1) susceptibility of soil or surface material to erosion, (2) transportability of thesediment, and (3) the amount and rate of runoff given a particular rainfall input, as measured under a standardcondition. Fine-textured soils that are high in clay have low K values (about 0.05 to 0.15) because the particles areresistant to detachment. Coarse-textured soils, such as sandy soils, also have low K values (about 0.05 to 0.2)because of high infiltration resulting in low runoff even though these particles are easily detached. Medium-texturedsoils, such as a silt loam, have moderate K values (about 0.25 to 0.45) because they are moderately susceptible toparticle detachment and they produce runoff at moderate rates. Soils having a high silt content are especiallysusceptible to erosion and have high K values, which can exceed 0.45 and can be as large as 0.65. Silt-size particlesare easily detached and tend to crust, producing high rates and large volumes of runoff. Use Site-specific data mustbe submitted.Site-specific K factor guidance24.629K Factor Value1101112C) LS Factor (weighted average, by area, for all slopes)The effect of topography on erosion is accounted for by the LS factor, which combines the effects of a hillslope-lengthfactor, L, and a hillslope-gradient factor, S. Generally speaking, as hillslope length and/or hillslope gradient increase,soil loss increases. As hillslope length increases, total soil loss and soil loss per unit area increase due to theprogressive accumulation of runoff in the downslope direction. As the hillslope gradient increases, the velocity anderosivity of runoff increases. Use the LS table located in separate tab of this spreadsheet to determine LS factors.Estimate the weighted LS for the site prior to construction.LS Table1314151617181920LS Factor ValueWatershed Erosion Estimate (=RxKxLS) in tons/acreSite Sediment Risk FactorLow Sediment Risk: < 15 tons/acreMedium Sediment Risk: >=15 and = 75 tons/acre24.62Medium0
Page 1 and 2: Storm Water Pollution Prevention Pl
Page 3 and 4: Section 1 Introduction1.1 Obtaining
Page 5 and 6: 1.7 Required Non-Compliance Reporti
Page 7 and 8: proposed drainage swale. Run-on als
Page 9 and 10: • Paint (for pavement markings)2.
Page 11 and 12: SE-10 Storm Drain Inlet ProtectionT
Page 13 and 14: Section 4 Construction Site Monitor
Page 15 and 16: Section 34.1 Visual Monitoring/ Ins
Page 17 and 18: Sampling personnel will collect sto
Page 19 and 20: • Discard sample bottles or sampl
Page 21 and 22: • A summary of all analytical res
Page 23 and 24: Section 6 Notice of TerminationWith
Page 25 and 26: Owner’s (or Authorized Representa
Page 27 and 28: Appendix BContractor Information
Page 29 and 30: Appendix CSite Map/Erosion and Sedi
Page 31 and 32: SILT FENCEINLET PROTECTIONAScale: N
Page 33: Risk Assessment DeterminationConstr
Page 37 and 38: Combined Risk Level MatrixReceiving
Page 39 and 40: ATTACHMENT A.1EATTACHMENT A.1LUP Pr
Page 41 and 42: Risk Level 2 Requirements from Atta
Page 43: Any sediment basins shall be design
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Construction Site Monitoring PlanDa
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Maintenance, Inspection, and Repair
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Maintenance, Inspection and Repair
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Quality Assurance and Quality Contr
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Date:Date Rain Predicted to Occur:0
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Rain Event Action Plan (REAP)Date o
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Appendix HPollutant Testing Guidanc
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Appendix HIPollutant Testing Guidan
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Appendix JOther Plans and Permits
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TABLE OF CONTENTSI. FINDINGS ......
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Order3. This General Permit regulat
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OrderB. Activities Covered Under th
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Order35. Discharges occurring in ba
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OrderG. Determining and Reducing Ri
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Order55. This General Permit establ
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Ordercause physical impacts on rece
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OrderIT IS HEREBY ORDERED that all
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OrderJuly 1, 2010. If an existing d
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Order3. The discharger shall contin
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OrderIII. DISCHARGE PROHIBITIONSA.
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OrderIV. SPECIAL PROVISIONSA. Duty
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Order2. Access and copy at reasonab
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Order2. There were no feasible alte
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Order2. The Porter-Cologne Water Qu
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Ordershall be within the ranges spe
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OrderVI. RECEIVING WATER LIMITATION
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OrderEffective two years after the
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OrderXIII. POST-CONSTRUCTION STANDA
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OrderXIV. SWPPP REQUIREMENTSA. The
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OrderXVI. ANNUAL REPORTING REQUIREM
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Storm Water Pollution Prevention Plan (SWPPP) - the City of Lompoc!

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