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e ` • • <br /> California Regional Water Quality Control Board , <br /> ` Central Valley Region <br /> �ti.. <br /> Katherine Hart, Chair <br /> 11020 Sun Center Drive,4200,Rancho Cordova,California 95670-6114 <br /> Matthew Rodriquez (916)464-3291 •FAX(916)464-4645 Edmund G.Brown Jr. <br /> Secretary for hrtp://www.waterboards.ca.gov/centralvalley Governor <br /> Environmental Protection <br /> RE CE- tv <br /> 24 January 2012 JAN 2 6 20!� <br /> OWIRONMENTAL HI LTjj <br /> Mr. Curt M. Richards PERMIPSERACeq <br /> Corporate Vice President <br /> Environmental, Health & Safety <br /> Olin Corporation <br /> 3855 North Ocoee Street, Suite 200 <br /> Cleveland, Tennessee 37312 <br /> GROUNDWATER MONITORING AND REPORTING PROGRAM R5-2008-0819 <br /> OLIN CHLOR ALKALI TRACY SITE, 26700 SOUTH BANTA ROAD, TRACY, SAN JOAQIN <br /> California Regional Water Quality Control Board, Central Valley Region (Central Valley Water <br /> Board) staff has reviewed the Request for Revision of Monitoring and Reporting Program <br /> No. R5-2008-0819 (MRP Request), dated 26 September 2011. Stantec Consulting <br /> Corporation prepared the MRP Request on behalf of the Olin Corporation (Olin) for its <br /> chemical manufacturing facility (Site) in Tracy, California. I have attached a Draft MRP for <br /> your review. <br /> Background <br /> On 22 September 2011, you and Eva Hey of Stantec Consulting Corporation met with James <br /> Brownell of the Central Valley Water Board staff in our Rancho Cordova office to discuss the <br /> status of monitoring and cleanup at the Site. During that meeting, you proposed revisions to <br /> the MRP which you have included in the 26 September 2011 MRP Request. <br /> Comments <br /> The following comments briefly discuss your requests and the Central Valley Water Board <br /> staff responses incorporated into the attached Draft MRP: <br /> 1. Central Valley Water Board staff has deleted references in the Draft MRP to Olin's <br /> industrial water supply wells AP-1 and AP-2. The MRP Request states that Olin <br /> destroyed these wells in April 2010 and includes the well destruction reports in <br /> Appendix A. Olin had been utilizing AP-2 as a lower horizon monitoring well, but <br /> replaced it with new monitoring well MW-16 in November 2008. <br /> 2. Olin has collected groundwater samples from lower horizon monitoring well MW-16 <br /> during ten consecutive quarterly events. Laboratory chemical analyses have not <br /> detected volatile organic compounds. The Draft MRP requires semi-annual monitoring <br /> and sampling of this well. <br /> 3. Olin is no longer required to sample its industrial supply wells Banta #1, Banta #2, and <br /> Banta #3. Site monitoring wells will act as a guard wells for the detection of site <br /> constituents of concern (COCs) including carbon tetrachloride and chloroform. <br /> California Environmental Protection A ency <br /> o�Rec_rclerl/'aper <br />