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California "egional Water Quality Cor of Board <br /> Central Valley Region <br /> Linda S. Adams Arnold <br /> Secrrku7 lur Sacramento Main Office Schwarzenegger <br /> /:nrtromnentu/ 11020 Sun Center Drive#200.Rancho Cordova.California 95 670-6 1 1 4 Governor <br /> Protection Phone(916)464-3291 •FAX(916)464-4645 ff�� <br /> http://+++vw.waterboards.ca.gov/centralvalleyIN <br /> 28 November 2006 NOV 2 9 2.006 <br /> ENVIROMVIENT HEALTH <br /> Mr. Frank Barone PERMIT/SERVICES <br /> Miller Springs Remediation Management, Inc. <br /> 2480 Fortune Dr., Ste. 300 <br /> Lexington, Kentucky 40509 <br /> EXTENSION FOR WORKPLANS, OCCIDENTAL CHEMICAL CORPORATION, 16777 <br /> HOWLAND ROAD, LATHROP, SAN JOAQUIN COUNTY <br /> The California Regional Water Quality Control Board, Central Valley Region (Regional Water <br /> Board) staff has received and reviewed the letter dated 22 November 2006, prepared by <br /> Conestoga-Rovers & Associates on behalf of Occidental Chemical Corporation. The letter <br /> requests an extension to the 15 December 2006 due date for a workplan to assess the <br /> potential fumigant and sulfolane source area around PW18 and a supplemental treatment work <br /> plan that proposes the use of a supplemental treatment technology for the existing groundwater <br /> treatment system. The letter requests that these two workplans be combined and submitted by <br /> 30 March 2007. The Regional Water Board staff concurs with combining the two workplans <br /> and requires that the two workplans be submitted to this office by 30 March 2007. <br /> The Regional Water Board staff acknowledges that the 2006 Annual report and 2007 Semi — <br /> Annual report due dates have been extended to 15 February 2007 and 15 August 2007, <br /> respectively. Regional Water Board staff verbally granted these extensions during the 2005 <br /> Annual meeting event. <br /> If you have any questions or concerns regarding this correspondence please feel free to <br /> contact me by telephone at (916) 464-4678 or by email at smeeksCaD-waterboards.ca.gov. <br /> Steven W. Meeks, E. <br /> Water Resource Control Engineer <br /> cc: Ms. Debbie Schecter, SFD72 Site Cleanup Branch, USEPA Region No. 9, <br /> San Francisco, CA <br /> Ms. Margaret Lagorio, San Joaquin County Environmental Health Department, Stockton, <br /> CA <br /> Mr. Ken Price, Miller Springs Holdings, Inc., Lexington, KY <br /> Mr. Alan L. Prouty, J.R. Simplot Company, Boise, ID <br /> Ms. Donna Murphy, JR Simplot Company, Lathrop, CA <br /> Mr. Thomas Prevost, Conestoga-Rovers & Associates, Stockton, CA <br /> Mr. Paul Horton, The Source Group, Inc., Walnut Creek, CA <br /> California Environmental Protection Agency <br />