Draft Phase II Small MS4 General Permit Water Quality Monitoring & Assessment Jonathan Bishop Chief Deputy Director Director State Water Resources Control Board

Overview of California Over 200 Traditional MS4s designated Over 1000 Non-traditional MS4s anticipated to be designated

North Bay Watershed Approximately 7 Phase II municipalities potentially affected in North Bay Watershed Anticipated that all municipalities will be brought under the MRP in the next permit cycle

Summary of Significant Changes Specific Permit Language Automatic designation for NTMS4s Automatic designation for Discharges to ASBS Urbanized area determined by the 2010 U.S. Decennial Census Program Management Section Industrial/Commercial Inspection Program Risk-Based approach to Post-Construction Storm Water Management/Hydromodification TMDLS Water Quality Monitoring and Assessment Program Effectiveness Assessment Standardized Annual Report Format

Concepts Influencing Proposed Monitoring Approach Data is needed to inform municipal actions for water quality protection/improvement Data may include information related to: receiving waters MS4 discharges Performance of BMPs Volumes, rates, and duration of storm water flow should be considered pollutants when developing a monitoring program

Monitoring must be relevant to the biological health of the receiving waters. Characterization of pollutants in urban storm water runoff is generally well established (e.g., types, loading, concentrations): There is limited need to conduct new characterization monitoring. Need to better understand the short- and long- term performance of emerging technologies especially those that are being increasingly utilized by municipalities (e.g., Low Impact Development). Concepts Influencing Proposed Monitoring Approach

AMBIENT CONDITIONS (RECEIVING WATERS) Limited parameters (habitat, selected chemical constituents, flow and/or biological health) Partnerships with other stakeholders are encouraged to leverage limited resources Incentives for Regional Monitoring Collaboratives SWAMP Proposed Approach

Tentative Timeline Early Spring 2011: Administrative Draft Late Spring 2011: Public Draft Early Summer 2011: Public workshops Winter 2011: Permit Adoption Six months or up to One Year from Permit Adoption: Revise SWMPs to conform to new permit requirements

Phase II Contact Information Christine Sotelo, Phase II Program Manager (916)

Construction General Permit Monitoring and Reporting Requirements

Project Risk Determination LOWMEDHIGH LOW Level 1Level 2 HIGH Level 2Level 3

Risk Level 1 Monitoring Requirements Visual Monitoring: Non Stormwater Discharge Non-Visible Pollutants Weekly visual inspections/Inspection Checklist Inspections every 24 hours during rain event

Risk Level 2 Monitoring Requirements Risk Level 1 Requirements, PLUS Effluent Monitoring: A minimum of 3 samples per day collected from discharges subsequent to a qualifying rain event (producing precipitation of ½ inch or more at the time of discharge). ATS effluent sampling if applicable (later slide) Preservation and handling in compliance with “Standard Methods for the Examination of Water and Wastewater” – American Public health Association & SWAMP Quality Assurance Program Plan (QAPrP) NAL exceedance reporting – samples submitted to RWQCB within 10 days, report upon request

Risk Level 2 Requirements

Risk Level 3 Monitoring Requirements Risk Level 2 Requirements, PLUS Numeric Effluent Limitations pH, Turbidity NEL violation reports to RWQCB within 24 hours, sampling results within 5 days after event Receiving Water Monitoring NEL exceedance and direct discharge to receiving waters (upstream and downstream) Bioassessment (limited cases) ‏ 30 acres or larger & direct discharge to receiving waters Requirements in Appendix 3 of the General Permit

5. Compliance Storm Event Permit Establishes a 5 year, 24 hour compliance storm event exception from NEL’s

6. Active Treatment Systems (ATS) ‏ Specific Requirements for ATS use in Attachment F of Permit NEL’s based on effective ATS performance: 10 NTU – Daily Flow Weighted Average 20 NTU – Single Sample Compliance Storm Event: 10 year 24 hour Proper Personnel Training

CGP Contact Information Program Management Greg Gearheart Implementation Annalisa Kihara E-reporting Patrick Otsuji