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Geofogical2"echnics Znc. <br /> 27417(iv R=dr yrs C ! !i;'i 11 09 <br /> Mo&esw,Cafifxrnw 95351 - <br /> (209)538-6424/¢x{#538-5852 <br /> i <br /> May 15, 1997 <br /> Project No.: 336.2 <br /> Project Name: C&B (I I' Street) <br /> Mr. Jesus Genera 1 <br /> State Water Resources Control Board <br /> 2014 T Street, Suite 130 <br /> P.O. Box 944212 <br /> Sacramento, CA 94244-2120 <br /> RE: Cost Pre Approval for Additional Site Characterization <br /> C'& B Equipment, 7474 West 11th Street, Tracy, California <br /> LOP Site Code No.; 1564; USTCFP Claim No.: 008464 <br /> Dear Mr. Genera: <br /> In written requests dated June 4, 1996, Mr. Ronald Rowe, Senior REHS for San Joaquin County <br /> Environmental Health Division (SJCEHD) requested additional soil and groundwater <br /> characterization work and risk evaluation work to be performed at C & B Equipment, 7474 West E <br /> 11th Street, Tracy, California. <br /> On behalf of C & B Equipment, Geological Technics Inc. (GTI) has evaluated the existing soil <br /> and groundwater data and worked with Mr. Rowe to define an acceptable scope of work for this <br /> investigation-. <br /> I <br /> Summary of Work to Date <br /> • Previous to the June 4, 1996 directive letter from SJCEHD, GTI performed an initial phase of <br /> site characterization which was presented in a report dated November 13, 1995. <br /> • July 15, 1996 - GTI prepared a work plan for additional site characterization. <br /> • December 6, 1996 - Don Liglit performed a monitoring even--and Ray Kablanow of GTI and <br /> Ron Rowe SJCEHD met with Mr. Frank Coehlo of C&B to discuss the direction the next I <br /> phase of investigation should take. Mr. Rowe requested changes to GTI's work plan. On <br /> December 10, 1996 GTI prepared a follow-up letter reviewing the items discussed in our site <br /> meeting. <br /> • January 13, 1997 - GTI prepared a groundwater monitoring report. <br /> • April 7, 1997 - GTI prepared an addendum to the work plan addressing the need for further <br /> investigation. <br /> • April 24, 1997 - Mr. Rowe approved the April 7, 1997 work plan addendum with some k <br /> modifications. <br /> I <br />