final construction stormwater general permit
DESCRIPTION
Final Construction Stormwater General Permit. Issued November 16, 2005. Jeff Killelea Department of Ecology. S1. Permit Coverage. Permit required for 1+ Acre Construction Activity Clearing, Grading, Excavation Not required for routine maintenance Permit does not cover - PowerPoint PPT PresentationTRANSCRIPT
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Final Final Construction Stormwater Construction Stormwater
General PermitGeneral PermitIssued November 16, 2005Issued November 16, 2005
Jeff Killelea Department of Ecology
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S1. Permit CoverageS1. Permit Coverage
Permit required for 1+ Acre Permit required for 1+ Acre Construction ActivityConstruction Activity– Clearing, Grading, ExcavationClearing, Grading, Excavation– Not required for routine maintenanceNot required for routine maintenance
Permit does not coverPermit does not cover– Federal/Tribal projectsFederal/Tribal projects– Post-Construction StormwaterPost-Construction Stormwater– Non-point silvicultural activity Non-point silvicultural activity
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S2. ApplicationS2. Application
Application Form (Notice of Intent)Application Form (Notice of Intent)– SEPASEPA– Public NoticePublic Notice– 30 day Public Comment period30 day Public Comment period
Erosivity WaiverErosivity Waiver
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S3. Compliance with StandardsS3. Compliance with Standards
Discharges must not violate Water Discharges must not violate Water Quality StandardsQuality Standards– Surface WaterSurface Water– Ground WaterGround Water– SedimentSediment
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S3. Compliance with StandardsS3. Compliance with Standards
Turbidity
pH
Phosphorus
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S4. MonitoringS4. Monitoring
2 Basic Components:2 Basic Components:
– Site InspectionsSite Inspections
– Discharge SamplingDischarge SamplingTurbidity/TransparencyTurbidity/TransparencypH pH
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S4. MonitoringS4. Monitoring
Site InspectionsSite Inspections– Who? Certified inspectorWho? Certified inspector– What? Disturbed areas, BMPs, outfallsWhat? Disturbed areas, BMPs, outfalls– When? Weekly and after stormsWhen? Weekly and after storms
Site Log BookSite Log Book– Inspection checklists/reportsInspection checklists/reports– Document BMP maintenanceDocument BMP maintenance– Document monitoringDocument monitoring
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S4. MonitoringS4. Monitoring
Sampling: Turbidity/TransparencySampling: Turbidity/Transparency– Weekly (If Discharging)Weekly (If Discharging)
Less than 5 acresLess than 5 acresTurbidity Meter Turbidity Meter oror Transparency Tube Transparency TubeDeferred until Oct 1, 2008Deferred until Oct 1, 2008
5 acres or More5 acres or MoreTurbidity MeterTurbidity MeterDeferred until Oct 1, 2006Deferred until Oct 1, 2006
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S4. MonitoringS4. Monitoring
Transparency Tube $34
Turbidity Meter $800
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S4. MonitoringS4. Monitoring
Sampling: Turbidity/TransparencySampling: Turbidity/Transparency
Turbidity Benchmark = 25 NTUTurbidity Benchmark = 25 NTUTransparency Benchmark = 31 cmTransparency Benchmark = 31 cm
If Discharge Exceeds Benchmark: If Discharge Exceeds Benchmark: Actions Required to Prevent PollutionActions Required to Prevent Pollution
Adaptive managementAdaptive management
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S4. MonitoringS4. Monitoring
If 25 NTU Benchmark Exceeded:If 25 NTU Benchmark Exceeded: Review SWPPP and make Review SWPPP and make
appropriate revisions within 7 daysappropriate revisions within 7 days Implement and maintain appropriate Implement and maintain appropriate
source control and/or treatment source control and/or treatment BMPs within 10 daysBMPs within 10 days
Document actions in the site log Document actions in the site log book. book.
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S4. MonitoringS4. Monitoring
If Benchmark [If Benchmark [REALLYREALLY] Exceeded] Exceeded
(Turbidity (Turbidity 250+ NTU250+ NTU):): Same steps as 25+ NTU, Same steps as 25+ NTU, ANDAND Call Ecology within 24 hrsCall Ecology within 24 hrs Continue to sample Continue to sample dailydaily until until
discharge is below 25 NTU or meets discharge is below 25 NTU or meets WQ Standards (or stops)WQ Standards (or stops)
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S4. MonitoringS4. Monitoring
Sampling: pHSampling: pHSignificant Concrete (1000 ydsSignificant Concrete (1000 yds33))
Engineered SoilsEngineered SoilsCement Kiln Dust (CKD)Cement Kiln Dust (CKD)Portland Cement Treated Base (CTB)Portland Cement Treated Base (CTB)Fly AshFly Ash
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S4. MonitoringS4. Monitoring
Sampling: pHSampling: pHIf pH over 8.5:If pH over 8.5:
Prevent dischargePrevent discharge Implement treatment (neutralize pH)Implement treatment (neutralize pH)
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S5. Reporting & RecordkeepingS5. Reporting & Recordkeeping
Discharge Monitoring ReportsDischarge Monitoring Reports– Monthly (beginning in Nov 06 or 08)Monthly (beginning in Nov 06 or 08)– Mail or Electronic SubmittalMail or Electronic Submittal
Phone ReportingPhone Reporting– If Turbidity is 250 NTU or greaterIf Turbidity is 250 NTU or greater– If Transparency is 6 cm or lessIf Transparency is 6 cm or less
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S5. Reporting & RecordkeepingS5. Reporting & Recordkeeping
Ecology Access to Stormwater PlansEcology Access to Stormwater Plans– Maintained on-site Maintained on-site – Made available upon requestMade available upon request– 14 days of written request14 days of written request
Public Access to Stormwater PlansPublic Access to Stormwater Plans– 14 days of written request14 days of written request– May provide to Ecology for public reviewMay provide to Ecology for public review
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S8. Impaired WaterbodiesS8. Impaired Waterbodies
Limits for polluted waterbodiesLimits for polluted waterbodies
– Impaired Waters on 303(d) listImpaired Waters on 303(d) list– Water Clean Up Plans (TMDLs)Water Clean Up Plans (TMDLs)
TurbidityTurbidityFine SedimentFine SedimentHigh pHHigh pHPhosphorusPhosphorus
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S8. Impaired WaterbodiesS8. Impaired Waterbodies
Monitoring/Discharge RequirementsMonitoring/Discharge Requirements
Turbidity/Fine Sediment ImpairmentTurbidity/Fine Sediment ImpairmentMonitor turbidityMonitor turbidity
Phosphorus ImpairmentPhosphorus ImpairmentMonitor turbidityMonitor turbidity
High pH ImpairmentHigh pH ImpairmentMonitor pH Monitor pH
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S9. Stormwater Pollution S9. Stormwater Pollution Prevention PlanPrevention Plan
General SWPPP RequirementsGeneral SWPPP Requirements– NarrativeNarrative– MapMap
BMPs selected from Ecology’s BMPs selected from Ecology’s Stormwater Manuals or EquivalentStormwater Manuals or Equivalent
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S9. Stormwater Pollution S9. Stormwater Pollution Prevention PlanPrevention Plan
SWPPP Contents SpecifiedSWPPP Contents Specified– 12 elements of SWPPP12 elements of SWPPP
SWPPP Modification SWPPP Modification – If inspections show SWPPP is ineffective: If inspections show SWPPP is ineffective:
additional or modified BMPsadditional or modified BMPs
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S10. Notice of TerminationS10. Notice of Termination Site Eligible:Site Eligible:
– All construction stormwater discharges All construction stormwater discharges eliminatedeliminated
– All Temporary BMPs removedAll Temporary BMPs removed– Site has undergone final stabilizationSite has undergone final stabilization
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Appeal TimelinesAppeal Timelines
General Permit: Within 30 General Permit: Within 30 days of issuance or receiptdays of issuance or receipt
Individual Site Coverage: Individual Site Coverage: Within 30 days of effective Within 30 days of effective date. date.
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QUESTIONS?QUESTIONS?
Jeff KilleleaJeff KilleleaDepartment of EcologyDepartment of Ecology
360-407-6127360-407-6127
[email protected]@ECY.WA.GOV