New Storm Water Regulations

1. New Storm Water Regulations Project Clean Water Stakeholder Meeting May 2013

2. Source of Regulations • State Water Resources Control Board’s NPDES Municipal General Permit • Central Coast Regional Water Quality Control Board’s Post Construction Requirements for Development Projects

3. NPDES Municipal General Permit • National Pollutant Discharge Elimination System • Program enacted under the Clean Water Act • Requires a permit for point-source discharges into waters of the U.S. • Cities and Counties discharge stormwaterthrough our storm water drainage systems • NPDES Permit program is delegated to the State Water Resources Control Board • State issues Municipal General Permit for smaller urban areas

4. NPDES Municipal General Permit • Sets minimum standards for all jurisdictions with separate storm drain systems • First five-year Municipal General Permit was issued in 2003 • Reissued in February 2013 – following extensive public review and comment • Local review of permit programs through Central Coast Regional Water Quality Control Board, one of 9 regional boards of SWRCB

5. Federal Clean Water Act State NPDES Municipal General Permit Water Quality Regulations Regional Water Quality Control Board Storm Water Program Oversight

6. 2003 Minimum Control Measures • Public Education and Outreach • Public Involvement and Participation • Illicit Discharge Detection and Elimination • Construction Site Storm Water Runoff Control • Pollution Prevention / Good Housekeeping Practices in Municipal Operations • Post-construction Storm Water Management in New Development

7. Public Outreach & Education www.sbprojectcleanwater.org

8. Public Involvement & Participation

9. Illicit Discharge Detection & Elimination

10. Pollution Prevention and Good Housekeeping

11. ConstructionActivities

12. New and Redevelopment

13. 2013 Minimum Control Measures • Public Education and Outreach • Public Involvement and Participation • Illicit Discharge Detection and Elimination • Construction Site Storm Water Runoff Control • Pollution Prevention / Good Housekeeping Practices in Municipal Operations • Post-construction Storm Water Management in New Development • Program Management • Water Quality Monitoring • Program Effectiveness Assessment • Total Maximum Daily Load Compliance • Annual Reporting Program

14. What’s Changed for Santa Barbara CountyAdministrative/Program Management Changes • Guidance Document replaces Storm Water Management Program • CEO is now legally responsible person and needs to certify that the County has adequate legal authority to implement and enforce permit • Revised Storm Water Ordinance – organized car washes, mobile cleaning, incidental runoff from landscape now prohibited • Annual Online Reporting

15. What’s Changed for Santa Barbara CountyOperations/Implementation Changes • Water Quality Monitoring • Water Quality Sampling • Storm Drain Maintenance • Road Maintenance Best Management Practices • Flood Control Facilities – Water Quality Features • Post Construction Requirements – Central Coast Regional Board overrides state requirements

16. Post-Construction Requirements

18. Site Design (small projects) • Limit disturbance creeks • Minimize compaction soils • Limit clearing native vegetation • Minimize impervious surfaces • Minimize runoff by one or more: • Roof to cistern • Roof to veget areas • Sidewalks to veget • Driveways to veget • Use permeable surfaces

19. Water Quality Treatment • In order of preference: • Use LID treatment systems (not defined) • Biofiltration w underdrain (defined) • Non-retention based systems • Stormwater Control Plans • Statement of Compliance

20. Specific bioretention requirements similar to state permit: Surface loading rate 5”/hr 85th percentile 24-hr rainfall event Surface reservoir min depth 6” Planting depth min 24” Subsurface storage depth min 12” Underdrain at top of subsurface storage No liners or barriers unless needed Source: LIDI

21. Runoff Retention • Depending on WMZ, retain runoff from all events up to and including the 85th or 95th percentile • Compliance via: • Infiltration, or • Store and use, evapotransporate, infiltrate • Additional Site Design Measures

22. Watershed Management Zones Carpinteria Goleta

23. Watershed Management Zones Buellton Santa Maria

25. 95th Percentile Identify location of your project. Isohyetals online: www.waterboards.ca.gov

26. Additional Site Design Measures All measures for 2,500 sf Define and identify development envelope and protected areas Conserve natural areas Limit overall imperv Streets, sidewalks min width Set-back development from creeks, etc. Conform layout along landforms Avoid excessive grading

27. Retention Submittals – Storm Water Control Plan • Site Assessment identifying opportunities and constraints to implement LID • Delineation of Drainage Management Areas • First, maximize retention in undisturbed and natural landscape areas, then • SCMs per Attachment D, or • Offsite Retention

29. Reductions for Retention • Technical Infeasibility • Redevelopment • Redevelopment in an Urban Sustainability Area • 10% EISA • 0.5 x Imperv Area • Match pre-project runoff volume retained

30. Special Circumstances

31. Offsite Compliance If: You may retain offsite: Within same watershed, AND Have mitigation project completed within four years, AND Have funding transferred to Municipality’s escrow account or bonding • Don’t retain Retention Volume onsite AND Demonstrate technical infeasibility AND don’t meet 10% EISA, or • New development in Urban Sustainability Area, OR • Approved Watershed Regional Plan

32. Long-term • O&M Plan (part of project approval) • Maintenance Agreement and Transfer of Responsibility • Database all SCMs • Annual reporting

33. Pre-existing programs • Lompoc • Santa Barbara • Santa Cruz

34. Prop 84 Grant $347,000 • Technical Guide • Education & Training • Workshops (July 30, 31) • Example projects • Coordination with Water Board staff • Update Development Review procedures • Focused technical studies • Offsite compliance • Field verification and maintenance program