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L <br /> STATE OF CALIFORNIA-RESOURCES AGENCY <br /> Y <br /> EDMUND G BROWN JR, GOVERNOR: <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD- <br /> CENTRAL VALLEY REGION " <br /> 3201 S STREET <br /> SACRAMENTO, CALIFORNIA 95916 <br /> PHONE: (916) 4454270 <br /> fe <br /> 8 July 1982 J <br /> U4 1 7�982 <br /> Mr. Jack Andrews, Works Engineer <br /> H�JTyp�T�;°T�1C <br /> Marley Cooling Tower Company <br /> 150 North Sinclair <br /> Stockton, CA 95205 <br /> MARLEY COOLING TOWER COMPANY, SAN JOAQUIN COUNTY <br /> We have reviewed the preliminary soil analysis for the retort pit and, as <br /> we have discussed, feel that additional samples are necessary to further <br /> define the lateral and vertical extent of contamination in this area. <br /> The attached map shows the locations where the additional soil borings <br /> should be placed. Samples should be obtained from depths of 3, 5, 7, and <br /> 10 feet .and should be analyzed for copper, arsenic, and both trivalent <br /> and hexavalent chromium. Physical properties of the samples such as pH, <br /> total organic and clay content, soil classification and permeability should <br /> also be obtained. <br /> We understand you plan to proceed with the drilling work very soon. We <br /> would appreciate it if you would give us a day or two advance notice of the <br /> sampling in order that we may be present and possibly collect some duplicate <br /> samples. <br /> In addition, we can also finalize plans for sampling the storm water pond <br /> and resample the water wells located on-site. <br /> If you have any questions <br /> please call me at (916) 322-9093, j <br /> �� ! <br /> BOB FUJII <br /> Area Engineer <br /> i <br /> REF:sb <br /> r <br /> Attachment <br /> i <br /> cc: Mr. Ron Heinzen, Kleinfelder & Associates, Stockton / <br /> Mr. Lee Hall , San Joaquin County Health Dept. , Stockton V i <br /> Mr. Jim Pappas, DOHS-HWMB, Sacramento <br /> k <br /> z. l <br />