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HomeMy WebLinkAbout06.a.2) (Handout)Whole Effluent Toxicity April 21, 2011 Margaret P. Orr, P.E. Central Contra Costa Sanitary District Overview • Issue *SWB member meetings • Feedback SWB • Issues by BACWA *Status per SWB members • Next steps Central Contra Costa Sanitary District I Issue • SWRCB has proposed to replace the current Whole Effluent Toxicity Test (WET) statistical analysis methods with a new Test of Significant Toxicity (TST) method Monday Meetings • SFPUC • San Jose • Central San • CASA • Chairman Hoppin • John Bishop, Deputy Director Water Quality • Tam Doduc, Member • Fran Spivey - Webber, Member 2 0 f Feedback from SWB • Goal - statewide policy • Agriculture • Storm water 1900, • Eliminate the potential to "game" the system • Continuously keep an issue "under study" • SWB "wants less work" SWB Proposed Fix • Test of Significant Toxicity (TST) • Guilty until proven innocent • False violations • Possible impairment receiving water, TMDL • Effluent violations / Enforceable action • Potential citizen lawsuits • Undermine public perception of recycled water • Numeric Limit • Violations • Easier for SWB to enforce (not really) 3 Issues Raised at Hearing (November 2010) • Agriculture and storm water • Do not include us • Do not use numeric limits BACWA Issues • Apply to everyone • Agriculture • Storm Water • Do not use TST / use point estimation • Numeric limits not reasonable for toxicity El j Status • Dropping • Agriculture • Storm water • Delayed until the end of the year • Some members "wedded to" numeric limits • Two open SWB member positions Next Steps • Engage SWB staff on effect of TST • Engage staff on benefit of current method • Alternative to numeric limits • BACWA provide resources 5