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. a <br /> A A 'ft <br /> GROUNDWATER 95 imm -q PM 1: 44 <br /> D11E] TECHNOLOGY ® Groundwater Technology,Inc <br /> 4057 Port Chicago Highway,Concord,CA 94520 IDSA <br /> December 22, 1994 Tel (510)671-2387 Fax (510)685-9148 <br /> Ms Linda Turkett <br /> San Joaquin County Public Health Services <br /> P 0 Box 2009 <br /> 445 N San Joaquin Street <br /> Stockton, CA 95201 / <br /> Subject Fourth Quarter 1994 Status Report <br /> Golden Grain Company, Manteca Bean Facility <br /> 229 Moffat Boulevard, Manteca, California <br /> GTI Project 042020102 <br /> Dear Ms Turkett <br /> On behalf of Golden Grain Company, Groundwater Technology, Inc has prepared this Fourth <br /> Quarter 1994 Status Report on groundwater and soil conditions at the Manteca Bean Facility in Manteca, <br /> California (attachment 1, figure 1), for the quarter ending December 9, 1994 The field work included <br /> weekly treatment system operation and maintenance along with quarterly groundwater monitoring and <br /> sampling <br /> The groundwater monitoring and sampling results enabled evaluation of the groundwater gradient and <br /> distribution of dissolved hydrocarbons in groundwater Groundwater monitoring data and results of <br /> laboratory analyses of groundwater samples collected on November 18, 1994, are included All work <br /> was performed as described in a monitoring and sampling plan submitted to, and approved by, <br /> San Joaquin County Public Health Services on February 27, 1992 <br /> In addition to quarterly monitoring and sampling activities,the soil and groundwater remediation system <br /> was operated and maintained during this quarter The treatment system operated as it has for the past <br /> two years until October 11, 1994, when system modifications were performed Two additional vapor <br /> wells were added to the soil vapor extraction system (SVES) and the existing lead scrubber was <br /> removed from the SVES vapor stream Details regarding the operation of the system through December <br /> 9, 1994, including the system modifications, efficiency, and future remediation plans for the site are <br /> discussed below <br /> MONITORING WELL GAUGING <br /> Before well purging and water sample collection on November 18, 1994, Groundwater Technology <br /> personnel gauged all of the site wells to measure the depth to water and the depth to separate-phase <br /> s <br /> 0102RO44 202 <br /> Offices throughout the U S,Canada and Overseas <br />