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STATE PF CALIFORNIA -Environmental Protec Agency PETE WILSON, Governor <br /> `,CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> 3443 Routier Road, Suite A <br /> Sacramento, CA 95827-3098 <br /> PHONE: (916) 255-3000 <br /> FAX:(916) 255-3015 <br /> 29 December 1993 <br /> Mr. Nick Nickerson _ <br /> Unocal Corporate Environmental Remediation & Technology ; <br /> 2000 Crow Canyon Road, Suite 450 <br /> San Ramon, CA 94583 <br /> REVIEW OF SOIL INVESTIGATION-REPORT; REQ0jTST FOR FURTHER -- <br /> ASSESSMENT <br /> Thank you for submitting the report covering the results of the soil investigation at the feed <br /> products facility on West Washington Street, in the Port of Stockton. The report contains <br /> results from the two sampling events conducted by Sierra Pacific Groundwater Consultants <br /> during 1993. <br /> The lateral and vertical extent of nitrate, TKN, and various feed products has been defined in <br /> four of the zones of contamination (the urea tank area, acid containment area, 10-34-0 tank <br /> area, and south driveway area). However, the data indicates that contamination extends <br /> within the office area and west tank farm area, and that the lateral and vertical extent of this <br /> contamination has not yet been delineated. <br /> Therefore, this letter serves as a request for a further assessment of the extent of soil <br /> contamination at the remainder of the feed facility. We share your consultant's confidence in <br /> the results received to date, and expect that the further assessment would be completed in a <br /> similar manner. Please submit a short workplan covering the above by 31 January 1994. <br /> Thank you for your cooperation in this investigation. If you have any questions, I can be <br /> reached at,(916)-255-31-04. - <br /> ti� . <br /> WENDY WYELS <br /> Ag Regulatory Unit <br /> cc: Mr. John Rapp, Sierra Pacific Groundwater Consultants, El Dorado Hills <br /> Mr. Mike Infurna, San Joaquin County Environmental Health, Stockton <br /> Ms. Charlene Wall, Port of Stockton, Stockton <br /> Mr. Dale Matthews, PM Ag Products, Stockton <br /> Mr. Jack Holm, Cargill Molasses, Stockton <br />