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0 �® GROUNDWATER <br /> ❑❑❑ TECHNOLOGY, INC. 4057 Port Chicago Highway,Concord CA 94520(415)6712387 <br /> FAX (415)685-9148 <br /> February 9, 1993 <br /> Projec Number 023201466 t <br /> Site Cod r <br /> 2155 �� l <br /> L 5 <br /> Ms Linda Turkett F E B 12 1993 <br /> San Joaquin County Public Health Services <br /> P 0 Box 2009 ENVIRONMENTAL HEALTH <br /> 445 N San Joaquin Street PERMIT/SERVICES <br /> Stockton, CA 95201 <br /> RE FOURTH QUARTER 1992 REPORT <br /> MANTECA BEAN FACILITY <br /> 229 MOFFAT BOULEVARD <br /> MANTECA, CALIFORNIA <br /> Dear Ms Turkett <br /> This letter has been prepared by Groundwater Technology, Inc on behalf of Golden Grain Company <br /> as a quarterly report on groundwater and sod conditions at the Manteca Sean Facility in Manteca, <br /> California, for the quarter ending December 1992 The purpose of the field work was to determine <br /> groundwater gradient and the distribution of dissolved hydrocarbons in groundwater Groundwater <br /> monitoring data and results of laboratory analyses of groundwater samples collected on November <br /> 18, 1992, are included All work was performed as described in a monitoring and sampling plan <br /> submitted to, and approved by San Joaquin County Public Health Services on February 27, 1992 <br /> In addition to quarterly monitoring and sampling activities, the sod and groundwater remediation <br /> system continued to operate during this quarter Details regarding the operation of the system <br /> including the efficiency of the system and the continued remediation plans for the site are discussed <br /> below <br /> MONITORING WELL GAUGING <br /> Prior to well purging and water sample collection on November 18, 1992, Groundwater Technology <br /> personnel gauged 13 of the 15 site-related wells to determine the depth to water and the depth to <br /> separate-phase petroleum (SP), if present The well gauging was conducted in accordance with the <br /> Leaking Under round Fuel Tank Field Manual (LUFT) published by the State of California Leaking <br /> Underground Fuel Tank Task Force dated October 1989 Groundwater monitoring data are <br /> . ' summarized in Table 1 The water table elevations for November 18,x;1992, were used to prepared <br /> I0466al cd/nk <br /> r� <br /> Offices throughout the U 5 Canada and Overseas <br />