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Californi*tegional Water Quality Cc 'rol Board ' , <br /> Central Valley Region <br /> �e <br /> o <br /> Karl E.Longley,ScD,P.E.,Chair �`a;,�..u�" <br /> Linda S.Adams Arnold <br /> Secragfeta�yfor Sacramento Main Office Schwarzenegger <br /> Se <br /> Environmental ral 11020 Sun Center Drive#200,Rancho Cordova,California 95670-6114 Governor <br /> Phone www. acerb a •FAX(9 16)464-4645 - ^ rv, j, —` <br /> Protection {Ifu'1f ((�" {IJ1\`\/// U <br /> http://www.waterboards.ca.gov/centralvalley <br /> 9 May 2008 MAY 12 2008 <br /> ENVIRONMEN7' HEALTH <br /> Mr. Tim Van Domelen PERMIT,/SERVICES <br /> Manager, Environmental Health, Safety, and Security <br /> J. R. Simplot Company <br /> 16777 Howland Road <br /> Lathrop, CA 95333-0198 <br /> ADDENDUM TO COMBINED WORK PLAN— SOURCE AREA INVESTIGATION, POND <br /> DISCHARGE PUMP AREA AND PIPING INTEGRITY, AND SURFACE RELEASES, J.R. <br /> SIMPLOT COMPANY, 16777 HOWLAND ROAD, LATHROP, SAN JOAQUIN COUNTY <br /> The Central Valley Regional Water Quality Control Board (Regional Water Board) staff have <br /> received the Addendum to Combined Work Plan (Addendum), dated 18 April 2008, submitted <br /> on behalf of J. R. Simplot by Geomatrix. The Addendum was prepared following the annual <br /> meeting, site tour, and Combined Work Plan comment resolution discussion held at the facility <br /> on 26 March 2008. <br /> This letter serves to document Regional Water Board staff's understanding of the issues in the <br /> Combined Work Plan that were agreed upon on 26 March 2008, those presented in the <br /> Addendum, and those that are still not addressed or not clear. The source area investigation <br /> can go forward incorporating the clarifications and changes discussed in this letter. Except <br /> where noted, all comments have been addressed satisfactorily. <br /> My memo dated 21 March 2008 provided numbered comments. My summary of the comment <br /> resolutions uses the numbered comments as a reference. <br /> Comment Source Resolution <br /> Number <br /> 1 Addendum J.R. Simplot will coordinate sampling and monitoring events with <br /> P. 1 Oxychem in order to confirm whether downward migration is <br /> occurring. <br /> 2 Annual We agreed that environmental samples will be submitted to a <br /> meeting California-certified analytical laboratory. <br /> 3 Addendum We agreed that reports, well data, and analytical data will be <br /> p. 3 and electronically uploaded to GeoTracker. Geomatrix is developing <br /> Annual a database for groundwater results from both Simplot and <br /> Meeting Oxychem wells. Geomatrix will provide the groundwater data in <br /> a Progress Report due 21 July 2008. <br /> 4 Addendum Site background soils will be collected from locations EB-AZ, <br /> California Environmental Protection Agency <br /> �IS Recycled Paper <br />