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NV./ <br /> Response to Written Comments -27- 24 April 2007 <br /> City of Tracy WWTP <br /> San Joaquin County <br /> CENTRAL VALLEY CLEAN WATER ASSOCIATION (CVCWA) COMMENTS <br /> CVCWA — NPDES COMMENT #1: CVCWA urges the Regional Board to not adopt <br /> final effluent limitations for EC in permits where it is impossible to comply without <br /> building reverse osmosis facilities. The costs associated with reverse osmosis and <br /> issues related to power costs and brine disposal, outweigh the limited environmental <br /> benefit to be gained by forcing POTWs down such a path, particularily where, as in <br /> Tracy's situation, the POTW is demonstrated to be a very small contributor to the local <br /> salinity. The Regional Board has already rightfully determined that the issue of salinity <br /> is a valley-wide problem that must be subject to a long-term solution. <br /> RESPONSE: The Staff Report provides a detailed analysis of the compliance <br /> and permitting issues with respect to salinity. The Regional Water Board has <br /> several options to consider. <br /> Regional Water Quality Control Board, Central Valley Region <br /> Board Meeting — 3/4 May 2007 <br /> Item#17 <br />