Final Construction Stormwater General Permit Issued November 16, 2005 Jeff Killelea Department of Ecology.

Final Final Construction Stormwater Construction Stormwater

General PermitGeneral PermitIssued November 16, 2005Issued November 16, 2005

Jeff Killelea Department of Ecology

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

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

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

S3. Compliance with StandardsS3. Compliance with Standards

Turbidity

pH

Phosphorus

S4. MonitoringS4. Monitoring

2 Basic Components:2 Basic Components:

– Site InspectionsSite Inspections

– Discharge SamplingDischarge SamplingTurbidity/TransparencyTurbidity/TransparencypH pH

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

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

S4. MonitoringS4. Monitoring

Transparency Tube $34

Turbidity Meter $800

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

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.

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)

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

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)

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

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

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

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

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

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

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

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.

QUESTIONS?QUESTIONS?

Jeff KilleleaJeff KilleleaDepartment of EcologyDepartment of Ecology

360-407-6127360-407-6127

JKIL461@ECY.WA.GOVJKIL461@ECY.WA.GOV