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v..r Nmw' <br /> STATE OF CALIFORNIA — ENVIRONMENTAL PROTECTION AGENCY PETE WILSON, Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGION <br /> 3443 ROUTIER ROAD, SUITE A p <br /> SACRAMENTO, CA 95827-3098 <br /> PHONE: (916) 255-3000 O F"°UAI^'`� <br /> FAX: (916) 255-3015 <br /> 4 September 1996 <br /> Mr. Gary Rimmey SEP 13 1996 <br /> Cargill <br /> P.O. Box 9300; MS 48 ENVIRONMENTAL HEALTH <br /> Minneapolis, MN 55440-9300 PERMIT/SERVICES <br /> MONITORING WELL INSTALLATION; REQUEST FOR ADDITIONAL INFORMATION <br /> Thank you for submitting the Work Plan for Installation of Monitoring Wells at the Cargill Port <br /> Road No. 8 facility within the Port of Stockton. The workplan is approved with the following <br /> comments: <br /> . A minimum of 24-hours must elapse between well installation and well development. <br /> . The wells need to be sampled and surveyed within two weeks of development. A report <br /> concerning the well installation and monitoring will be due six weeks later. <br /> . A minimum of four quarters of monitoring will be required. In addition to collecting water <br /> samples, each monitoring event is to include a determination of the groundwater flow direction <br /> and gradient. <br /> Unless notified otherwise, we expect that Cargill will receive the necessary approvals from the <br /> Port of Stockton by the end of September. The wells should be installed in October, before the <br /> beginning of the rainy season. <br /> The Board's 2 July letter which requested the well installation workplan also requested that <br /> Cargill provide information regarding the planned removal of the top foot of soil at the site. <br /> This information has not yet been provided. Specifically, we need to when the excavation is <br /> scheduled, where and when the soil will be disposed of, when the excavation will be backfilled, <br /> and what material will be used for the backfill. Please provide this information as soon as <br /> possible. <br /> If you have any questions, I can be reached at (916) 255-3104. <br /> W VA� <br /> WENDY WYELS <br /> Ag Regulatory Unit <br /> cc: Mr. Jack Holm, Cargill, Stockton <br /> Ms. Charlene Wall, Stockton Port District, Stockton <br /> Mr. John Rapp, Sierra Pacific Groundwater Consultants, El Dorado Hills <br /> ,-Mr. Mike Infurna, San Joaquin County Environmental Health, Stockton <br />