1. Stormwater Regulations NC Division Of Water Quality DPPEA Technical Sharing Session May 25, 2004

2. Increased ImperviousnessIncreased Imperviousness Increased RunoffIncreased Runoff Increased PollutantsIncreased Pollutants Impacts to StreambanksImpacts to Streambanks Erosion/SedimentationErosion/Sedimentation Why Be Concerned About Stormwater

3. Why be Concerned about Stormwater? Declining water quality Declining water quality Increasing demand for clean water Increasing demand for clean water Urbanization: Urbanization: Population doubling every 50 years Population doubling every 50 years 88% increase in urban area from 1982-1997 (USDA-NRCS) 88% increase in urban area from 1982-1997 (USDA-NRCS)

4. State Stormwater Programs State Stormwater Management Program State Stormwater Management Program Water Supply Watershed Protection Program Water Supply Watershed Protection Program 401 Water Quality Certification Program 401 Water Quality Certification Program Nutrient Sensitive Waters Programs Nutrient Sensitive Waters Programs

5. General Management Strategy State Stormwater New Development / Redevelopment New Development / Redevelopment Minimize Impervious Cover-12% to 30% BUA Minimize Impervious Cover-12% to 30% BUA Use Passive Stormwater Management Use Passive Stormwater Management Engineered Controls Where Necessary, to remove 85% TSS Engineered Controls Where Necessary, to remove 85% TSS Approvals From State or Local Gov. Approvals From State or Local Gov.

7. NPDES Stormwater nPhase I  Industrial Activities  Construction Sites  5 acres  Large and Medium MS4s Phase II Phase II  Small MS4s  Construction Sites  1 acre  Industrial No-Exposure Certification

8. NPDES Industrial Coverage nManufacturing/Process Type Activities nPrivate and Public Entities nComprehensive Stormwater Pollution Prevention Plans nRegular Review and Assessment

9. Construction NPDES Coverage Required In Addition to E&SC Plan Required In Addition to E&SC Plan Point Source Discharges of Stormwater Point Source Discharges of Stormwater Projects Greater Than One Acre Projects Greater Than One Acre

10. Permit Conditions Limitations & Controls Submit and Receive Approved E & S Plan Submit and Receive Approved E & S Plan Comply With Approved E & S Plan Comply With Approved E & S Plan Materials Handling - fuel, oil, waste, etc. Materials Handling - fuel, oil, waste, etc. Chemical Application - fertilizers, etc. Chemical Application - fertilizers, etc. Operation and Maintenance Operation and Maintenance

11. Municipal NPDES Coverage Automatically Designated - Urbanized Areas Automatically Designated - Urbanized Areas State Designated Public Entities State Designated Public Entities Petitioned Entities That Are State Designated Petitioned Entities That Are State Designated

12. 2000 USA Census Urbanized Areas Automatic designation by USEPA of municipal separate storm sewer systems (MS4s) Automatic designation by USEPA of municipal separate storm sewer systems (MS4s)

15. North Carolina - NPDES Stormwater Program North Carolina NPDES Stormwater Program Automatic Coverage

16. North Carolina - NPDES Stormwater Program North Carolina NPDES Stormwater Program Automatic & Possible State Designation

17. Minimum Control Elements Public Education and Outreach Public Education and Outreach Public Involvement/Participation Public Involvement/Participation Illicit Discharge Detection & Elimination Illicit Discharge Detection & Elimination Construction Site Runoff Control Construction Site Runoff Control Post-construction Stormwater Management Post-construction Stormwater Management Pollution Prevention/Good Housekeeping Pollution Prevention/Good Housekeeping

18. Post Construction Runoff Control New development and redevelopment New development and redevelopment 1-year / 24-hour storm control 1-year / 24-hour storm control 85% average annual TSS removal 85% average annual TSS removal Operation & maintenance of BMPs Operation & maintenance of BMPs Specific requirements for Class SA, Tr, NSW Specific requirements for Class SA, Tr, NSW

19. Penalties for Noncompliance Penalty not to exceed $25,000 per day per violation. Penalty not to exceed $25,000 per day per violation.

20. Information Sources Division of Water Quality Stormwater and General Permits Unit http://h2o.enr.state.nc.us/su/stormwater.html Environmental Protection Agency http://cfpub.epa.gov/npdes/ http://cfpub.epa.gov/npdes/

24. GROUTED RIP RAP ENERGY DISSIPATOR

25. Grouted rip rap replaced with “wet meadow” and sediment forebay