Casqa2012 igp gtg
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The presentation summarizes changes between the 2011 and 2012 drafts of California's Industrial General Permit. Key changes include revising numeric action levels and removing numeric effluent limitations, modifying sampling frequency requirements, and adding anti-backsliding justifications and compliance demonstration options to provide more flexibility for permittees exceeding action levels. The presentation aims to explain the state's performance-based regulatory approach focusing on best management practices to protect water quality.
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Casqa2012 igp gtg
- 1. INDUSTRIAL GENERAL PERM IT UPDATE 2012 CASQA ANNUAL CONFERENCE GREG GEARHEART, PE ICDU/DWQ/SWRCB/CALEPA
- 2. PRESENTATION OUTLINE Summary of Changes History of Permit Reissuance Technical highlight on regulatory standards and the overall approach for this and future permit reissuances
- 3. GOALS Performance Based Model Improved Data Quality Incentives and Flexibility
- 4. 2011 Draft (previous draft) 2012 Draft (current draft) Electronic Filing Requirements No Change Numeric Action Levels (NALs) & Numeric Effluent Limitations (NELs) Revised NALs and Removed NELs Corrective Actions Exceedance Response Actions Certification and Training Requirements (QSD/QSP) QISP I, II, III & Licensees Exempt Qualified Storm Event Modified SUMMARY OF CHANGES
- 5. 2011 Draft (previous draft) 2012 Draft (current draft) Sampling Frequency Requirements Modified Daily Average/ Exceedances Modified Qualified Combined Samples Modified Compliance Storm Event Modified Inspection/VO Frequency Reduced Significantly Requirements for Facilities with Significant Land Disturbances Removed SUMMARY (CONT.)
- 6. 2011 Draft (previous draft) 2012 Draft (current draft) Conditional Exclusion – No Exposure Certification Updated Conditional Exclusion – No Discharge Certification Removed Conditional Exclusion – Green Storm Water Impact Reduction Technology (G-SIRT) Removed TMDL Requirements Revised SUMMARY (CONT.)
- 7. New Requirement Status ASBS Requirements New Addition Compliance Groups Absent in the 2011 draft, a revised approach has been added NEW ADDITIONS TO THE 2012 DRAFT
- 8. RECENT PERMIT REISSUANCE HISTORY January 2011 – 2011 Draft Permit released containing NALs and NELs October 2011 - Senate Select Committee on California Job Creation and Retention Hearing on Storm Water Permits focused on Economic Considerations
- 9. COST ANALYSIS IGP Cost Analysis led by WB staff and reviewed by WB economist Estimates Discharger’s cost to comply with the permit Full report, spreadsheet, and executive summary released with 2012 Draft
- 10. TECHNICAL HIGHLIGHT OF REGULATORY STANDARDS IN IGP The 2012 Draft IGP fundamentally requires identical performance / compliance standards as previous IGP(s) Some challenges remain before NELs in general storm water permits of this type Uses NALs to attempt to bridge over to next generation of permit(s)
- 11. WQS, BMPS AND NELS Strict compliance with Water Quality Standards (WQS) is achieved though Best Management Practices (BMPs) or Numeric Effluent Limitations (NELs) (CWA §§ 301(b), 402; 40 C.F.R. §§ 122.26, 122.28, 125.3.) BMPs are required to control or abate the discharge of pollutants when NELs are infeasible (40 C.F.R. section 122.44(k)(4)) It is infeasible to require compliance with NELs at this time.
- 12. INFEASIBLE TO REQUIRE COMPLIANCE WITH NELS Significant Gaps in Following: Regulatory Context for Numerics Daily average vs. instantaneous, etc. Wet weather vs. dry weather Variability and dilution / mixing zone Derivation of Numeric(s) Must match the context, cost info, etc. Characterization of Effluent and/or Receiving Water Guidance on how to evaluate compliance
- 14. Humboldt Bay BUs: • REC1 • REC2 • NAV • WILD • EST • MAR • MIGR • SPWM • SHELL Hypothetical Example Storm Water (SW) Discharges from an industrial facility to Humboldt Bay SW Effluent Limitations Technology-based BMPs: • Covering waste piles • Sweeping/cleaning of open areas • Treatment (basins) of solids • Etc. Receiving Water Limitations Numbers – TSS < 100 mg/L Narrative – “no toxics in toxic amounts” (1) Enforce ELs (2) Enforce RWLs
- 15. BAT/BCT AUTHORITY Industrial Storm Water Dischargers must meet the technology- based standards of: Best Available Technology Economically Achievable (BAT) for toxic and nonconventional pollutants; and Best Conventional Pollutant Control Technology (BCT) for conventional pollutants Can be met through technology-based effluent limits (TBELs) or implementation of BMPs (Narrative).
- 16. BAT/BCT EFFLUENT LIMITATIONS When developing TBELS, the permit writer must apply criteria outlined in 40 CFR 125.3(d) BAT/BCT Technical Criteria -Age of equipment and facilities involved -Process(es) employed -Engineering aspects of the application of various types of control techniques -Process changes -Non-water quality environmental impact including energy requirements
- 17. NALS & BAT/BCT NALs in Permit are not linked to BAT/BCT Most of the NALs are used as guides to determine BMP effectiveness and aim towards BAT/BCT Given NALs are not NELs, permit needs to allow Dischargers options to chasing NALs (otherwise, defacto NELs) Level 2 Demonstration Technical Reports provide offramps to “chasing NALs” route: BAT/BCT Natural Background; and Non-Industrial Source
- 18. NUMERIC ACTION LEVELS (NALS) Annual NAL exceedance The average of all the analytical results for a parameter from samples taken within a reporting year exceeds an annual NAL value for that parameter Instantaneous maximum NAL exceedance Two or more analytical results for TSS, O&G, or pH from samples taken within a reporting year exceed the instantaneous maximum NAL value (or is outside the NAL pH range).
- 19. NALS, CONT. NALs exceedances do not apply first year (until July 1, 2014, as drafted currently) Annual NAL exceedance values are based 100% on US EPA benchmarks Instantaneous maximum NAL exceedance values only for pH, TSS or O&G are based on a percentile approach
- 20. EXCEEDANCE RESPONSE ACTIONS (ERA) PROCESS
- 21. BASELINE STATUS Narrative Effluent Standards Numeric Action Levels Minimum BMPs Inspection, Maintenance & Repair Visual Monitoring Sample 1 qualified storm event per quarter
- 22. Trigger NAL EXCEEDANCES Annual Average exceeds the annual NAL values (within a reporting year) Any two or more samples for a single parameter exceed the NAL values in a reporting year (TSS, O&G, or pH )
- 23. Level 2 Status 1 QSE per quarter 1 QSE per quarter Sampling NAL Sampling Triggers NAL Level 1 Status Baseline Status Sampling Triggers NAL QSE QSE QSE Exceedance Response Actions Review SWPPP & implement operational BMPs (Level 1 Report) All Dischargers with NOI Coverage begin here Structural source control and/or treatment BMPs (Level 2 Technical Report or Demonstration) 1 QSE per quarter Technical Report Submittal
- 24. ERA REPORTING Level 1 ERA Report (QISP I or II prepared) Level 2 ERA Technical Report (QISP III prepared) ERA Level 2 Demonstrations
- 25. ERA LEVEL 2 DEMONSTRATIONS At any time in Level 2 status the Discharger’s QISP III may evaluate pollutant sources and submit one of the following: BAT/BCT Compliance Demonstration Technical Report (Receiving Water Limitations stilly apply) Non-Industrial Source Pollutant Demonstration Technical Report (BAT/BCT and Receiving Water Limitations still apply) Natural Background Demonstration Technical Report
- 26. BAT/BCT DEMONSTRATION Discharger believes they are already meeting BAT/BCT at their site. Only relieves Discharger from meeting Permit NAL and lets Discharger propose a new NAL. Does not definitively define BAT/BCT for the site, still responsible for the narrative standard of BAT/BCT and Receiving Water Limitations. Demonstration can be rejected at anytime by State or Regional Water Board
- 27. NATURAL BACKGROUND DEMONSTRATION Discharger believes pollutant occurs naturally and is not part of the industrial operations Only relieves Discharger from meeting Permit NAL for that pollutant Still responsible for the narrative standard of BAT/BCT and Receiving Water Limitations for all other pollutants Demonstration can be rejected at anytime by State or Regional Water Board
- 28. NON-INDUSTRIAL SOURCE DEMONSTRATION Discharger believes pollutant is from another source besides their industrial operations. Only relieves Discharger from meeting Permit NAL for that pollutant. Still responsible for the narrative standard of BAT/BCT and Receiving Water Limitations for all other pollutants. Demonstration can be rejected at anytime by State or Regional Water Board
- 29. CONTACTS Greg Gearheart- Industrial / Construction Discharges Unit Supervisor [email protected] 916-341-5892 Leo Cosentini – Industrial Permit Lead [email protected] 916-341-5524 Laurel Warddrip – Industrial Permit Staff [email protected] 916-341-5531 Regan Morey – Industrial Permit Staff [email protected] 916-323-8268
Editor's Notes
- #16: Conventional pollutants are biochemical oxygen demand (BOD5), total suspended solids, fecal coliform, pH, and any additional pollutants defined by the Administrator as conventional. The Administrator designated oil and grease as an additional conventional pollutant on July 30, 1979 (see 44 FR 44501).