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Ir!^ - r STATE OF CALIFORNIA--gwRoNmr M04CTION AGENCY R , PETE WILSON,Gawwrw CALIFORNIA REGIONAL ATER QUALITY CONTROL BOARD— CENTRAL VALLEY REGION 3443 ROUTIER ROAD,SUITE l SACRAMENTO,CA 95827-3098 PHONE_ (916)255-3000 FAX: (916)2555-3015 10 September 1996 At. Clark Taylor `Tice President and General Counsel Schaeffer Industries 141 South Western Coil Road Lindon, Utah 84042 PROPOSED SCHAEFFER INDUSTRIES FACILITY, SAN JOAQUIN COUNTY I have reviewed your Phase R environmental audit, and the copies of the case files you have ,p_rovided from.the San_7oaquin County Environmental Health Department and the Cal EPA's Department of Toxic Substanices Control. The property you proposed to develop is immediately adjacent to the former U. S. Chemical (USC) waste disposal surface impoundments. We provided j oversight of the closure of their impoundments and subsequent clean-up of the subsoils. The files you submitted to me for review represent a reasonable account of our involvement and documentation of the site clean-up and concentrations left on the site. In December 1994, we concluded that clean-up had been completed and no further regulatory action,other than the rescission of the USC waste discharge requirements,would be required. Your Phase 11 report provided by Kleinfelder, dated 3 September 1996, describes the installation of three borings later developed and converted to monitoring wells. Nineteen soil samples were analyzed from those three borings and water samples were collected and analyzed from each boring. The results of the soil analysis indicated the presence of low concentrations of ethylbenzene and TPH-Gasoline in boring 2 located closest to the ST&E Railroad line and on the northern end of your proposed property. Low level Zylenes were also present in soils at 61 feet below ground surface in boring 3 located at the southernmost end of your property. The results of the groundwater analysis indicated the presence of low concentrations of 1,1-Dichloroethylene and TPH -Unidentified Extractable Hydrocarbons (in the CIO to C24 carbon range)found in boring/ monitoring well 2. Sulfate was also analyzed and found to be present at low concentrations in all three on-site monitoring wells. The constituents and their respective concentrations found in the groundwater represent background conditions of the site and the board would not require any remediation action by the new site owner Schaeffer.I.ndustries. The concentration of constituents found in the on-site soils - - also would not result in a need for remediation. Based on the findings and conclusions of the Kleinfelder report the board would not recommend any further action. If you have any questions,please call me at'(916) 255-3142. GrVg V�gn . SeniorEngineer Land Disposal Section ere: VMr. Mike Infurna, San Joaquin County Environmental Health Department, Stockton Mr. Tony Martin, Kleinfelder, Inc., Stockton - j