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J <br /> Sierra-Pacific Groundwater Consultants, Inc. <br /> HYDROGEOLOGISTS& GEOLOGISTS <br /> Y - Y <br /> February 7, 1994 RECEIVED <br /> F E 8 1 1 1994 <br /> ENVIRONMENTAL HEALTH <br /> Ms. Catherine Whitworth PERMIT/SERVICES <br /> P.O. Box 280 <br /> Davis, California 95617 <br /> Subject. 2130 West Washington Street Environmental Work <br /> Ground Water Monitoring Program <br /> Sierra-Pacific Project No. 10-92-033 <br /> Dear Ms. Whitworth: <br /> Sierra-Pacific Groundwater Consultants, Inc. (Sierra-Pacific), under contract with Unocal <br /> Corporation (Unocal), has completed two phases of augering and soil sampling at the Cargill <br /> Molasses Division (Cargill),. formerly PM AG Products and PureGro Company, 2130 West <br /> Washington Street molasses facility at the Port of Stockton. Two existing monitoring wells at the <br /> site were decommissioned on 30 November 1993, and four new monitoring wells were installed on <br /> 21-22 December 1993. Water levels were measured four times in December, and one sampling <br /> event was completed. Initial test results indicate that nitrate concentrations are present in shallow <br /> ground water. <br /> Water level measurements from the four new monitoring wells at Washington Street indicate that <br /> ground-water was flowing northwest on 27 December 1993. By contrast, water level data from <br /> earlier investigations indicate that ground water tends to flow to the southeast in the west Port of <br /> Stockton area. Recent water level measurements taken at your 2040 West Washington Street <br /> property (California Farm Supply) are appear to be erratic. Insufficient data is available to explain <br /> sporadic water level measurements, and Sierra-Pacific is investigating several possible factors. <br /> Sierra-Pacific hereby requests permission to measure water levels and sample monitoring wells at <br /> the California Farm Supply site for nitrogen compounds. We would not test for petroleum <br /> hydrocarbon compounds or pesticides. We are trying to determine the nature ground water flow <br /> in the Washington Street area, and whether feed product concentrations are being transported in <br /> the ground water. <br /> Sierra-Pacific must have a signed Right-of--Entry agreement to sample any of our monitoring wells. <br /> An unsigned Right-of-Entry form (and a return envelop) is enclosed for your approval. <br /> (916)933.1468 <br /> 4911 Windplay Drive, Suite 4 El Dorado Hills, California 95762 <br /> (916)933-3197 FAX <br />