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STATE OF CALIFORNIA-Environmental ction Agency <br /> PETE WILSON Governor <br /> CALIFORNIA REGIONAL WATE ALITY CONTROL BOARD <br /> CENTRAL VAt-i..EY REGION <br /> 3443 Rou'ber Road,Suite A — <br /> Sacramento, CA 95827-3098 <br /> PHONE:)916) 255-3000 <br /> FAX: (916)255-3015 <br /> ED <br /> 5 November 1996 NOV 0 6 1996 <br /> --JVIRONMENTAL. HEALTH <br /> Mr. Gary Rimmey <br /> PERMIT/SERVICES <br /> Cargill, Inc. <br /> P.O. Box 9300, M.S. 48 <br /> Minneapolis, MN 55440 <br /> DEMOLITION AND SOIL EXCAVATION. PORT ROAD NO. 8 FACILITY <br /> Thank you for submitting the Facility ,demolition and Soil Excavation, Workplan for the Cargill Feed <br /> Product facility at Port Road No. 8, Port of Stockton. During the demolition, every effort should <br /> be made to minimize or reduce environmental impacts. As listed in the workplan, this includes <br /> locating and closing all stormwater and wastewater drains, cleaning all product lines, using spill <br /> control equipment as appropriate, and collecting all feed product residues and decontamination <br /> washwater. <br /> Once the demolition is completed, I understand that Sierra-Pacific will conduct a site inspection to <br /> visually identify areas of soil staining. Please inform me of this date, as I would like to accompany <br /> your consultants. <br /> A separate soil excavation workplan should be submitted after the inspection. Please note that the <br /> proposed excavation depth of 48" below ground surface (bgs) does not appear adequate. The May <br /> 1996 Results of Soil Investigation report documented excessive soil nitrogen concentrations at 6.5' <br /> bgs; however, the extent of vertical contamination was not determined. Confirmation samples must <br /> be collected from the sidewalls and bottom of the excavation at a rate of one sample per 400 ft' of <br /> excavation. <br /> I look forward to receiving the report of results for the groundwater monitoring well installation and <br /> sampling. This report should be submitted by 15 December, so that I will have a.chance to revie«r <br /> it before the January quarterly monitoring event. <br /> Please contact me to schedule the site inspection. I can be reached at (916) 255-3104. <br /> O �k� <br /> WENDY WYELS <br /> Agricultural Unit <br /> cc: Mr. Patrick Durham, Sierra Pacific Groundwater Consultants, El Dorado Hills <br /> Mr. Jack Holm, Cargill, Stockton <br /> Ms. Charlene Wall, Port of Stockton, Stockton <br /> Mr. Mike Infurna, San Joaquin County Public Health Service, Stockton <br />