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SECOR <br /> liNerurrliuual Aicoi/)uru(ccl <br /> April 25, 2000 i <br /> Mr. Marty Hartzell <br /> California RWQCB Central Valley Region <br /> 3443 Routier Road, Suite A <br /> Sacramento, CA 95827-3098 <br /> Subject: Revised Work Plan for Soil and Groundwater Assessment <br /> Ranch Market <br /> 23569 South Santa Fe Road <br /> Riverbank, California <br /> SECOR Project No. 077.42006 <br /> Dear Mr. Hartzell: <br /> SECOR International Incorporated (SECOR), working on behalf of Mr. Durhim Ali Jubari, <br /> submits this letter as a revised work plan for soil and groundwater assessment at the Ranch <br /> Market located at 23569 South Santa Fe Road in Riverbank, California(Figures 1 and 2 <br /> Attachment 1). The scope of work presented in this work plan supercedes SECOR's Work Plan <br /> for Soil and Groundwater Assessment dated March 30, 2000. <br /> REGULATORY REVIEW& DIRECTION <br /> This work scope will be conducted in response to two Regional Water Quality Control Board <br /> Central Valley Region(RWQCB) letters: the initial letter dated February 28 and a follow-up <br /> letter dated April 10, 2000 from Mr. Marty Hartzell (Attachment 2). Due to the presence of <br /> methyl-tert butyl ether(MtBE) in an active drinking water well,the RWQCB considers this Site <br /> investigation and cleanup a high priority. The RWQCB letters request the assessment include: <br /> • Definition of the lateral and vertical extent of soil and groundwater <br /> contamination on and off-site; <br /> • Vertical definition of soils utilizing a continuous coring method near the former <br /> underground storage tanks (USTs), and next to domestic well DW-2; <br /> • Onsite soil borings, located east, west, and north of the former tank pit. <br /> File. B-GmPrn a&Wellml.W <br /> 9912 Mismess Park/)rite. Sai/e /00. Sac morello. Lil 9 817 19161,3644880 19161,1644889 hill trtru•.secorcom <br />