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Sierra-Pacific Groundwater Consultants,Jnc.a _ <br /> Geologists, Engineers, and Compliance Specialists `' <br /> 1 <br /> .w •k. <br /> March 18, 1997. al <br /> Mr. Jack Holm, Superintendent <br /> Cargill, Inc. <br /> Port Road No. 8 <br /> Stockton, California 95203 <br /> i <br /> Subject. First-Quarter 1997 Monitoring Report, Cargill Feed Product Facility at Port Road No. 8, <br /> Stockton, California; Sierra-Pacific Project No. 95-128.05 <br /> Dear Mr. Holm: <br /> Three wells were measured and sampled on February 4, 1997. The First-Quarter 1997 Monitoring Report is <br /> enclosed for your review. Field observations and test results indicate the following: <br /> i <br /> • Ground water was flowing S 83' E with a gradient of 0.005 on February 4, 1997. Inflow of surface <br /> water from the nearby San Joaquin River apparently drives the flow of near-surface ground water to the <br /> southeast. <br /> • N-NO3 and TKN concentrations detected in ground water samples from the site were relatively low. <br /> Field evidence and chemical data suggest that anaerobic microbial denitrification is taking place beneath <br /> the site, and that feed products present in the subsurface have apparently enhanced the desired microbial <br /> activity. <br /> • Elevated cation concentrations and Specific Conductivity values at the Port of Stockton appear to be <br /> influenced by the intrusion of connate water into the shallow aquifers. <br /> Please call if you have questions or directives. <br /> i <br /> Sincerely, <br /> i <br /> SIERRA-PACIFIC GROUNDWATER CONSULTANTS, INC. <br /> Jo ephen Rapp, CEG-1133 <br /> Senior Engineering Geologist <br /> i <br /> JSR/PGD/jb <br /> Enclosure <br /> C. Gary Rimmey, Cargill <br /> Richard East, Cargill <br /> Wendy Wyels, RWQCB <br /> Michael Infurna, San Joaquin County <br /> Charlene Wall, Port of Stockton <br /> (916)933-1468 <br /> 4911 W indplay Drive,Suite 4 EI Dorado Hills.California 95762 (916)933-3197 FAX <br /> E <br />