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CONDOR EARTH TECHNOLOGIES INC <br /> y 188 Frank West Circle Suite I <br /> Stockton CA 95208 <br /> Phone 209.234.0518 <br /> FAX 209.234.0538 <br /> CONDOR www.condorearth.com <br /> THIRD QUARTER GROUNDWATER MONITORING REPORT <br /> SEPTEMBER 2003 <br /> Condor Project No. 3471D <br /> October 14, 2003 R DD E ll 1J E D <br /> Site Address: Eckert Cold Storage Co. NOV 1 0 2003 <br /> 757 Moffat Blvd. ENVIRONMENT HEALTH <br /> Manteca, California PERMIT/SERVICES <br /> Client: Mr. Pete Thompson <br /> 19901 Mc Henry Avenue <br /> Escalon, California <br /> Primary Agency: Harlin Knoll, San Joaquin County Environmental Health Department (SJCEHD) <br /> Copy to: James Barton, California Regional Water Quality Control Board, Central Valley <br /> Region (CRWQCB) <br /> This is a report of the results of the third quarter 2003 groundwater monitoring event conducted on <br /> September 2 and 3, 2003 at the above-referenced site. Maps indicating the site location, monitor well <br /> locations and well-collar elevations (site map), groundwater elevation contours, and groundwater gradient <br /> are included as Figures 1, 2, 3, and 4, Attachment A, respectively. Also attached are site background <br /> information, historical groundwater monitoring data, field forms, and laboratory analytical reports for the <br /> current monitoring event. This report has been submitted to the San Joaquin County Environmental <br /> Health Department (SJCEHD) and the California Regional Water Quality Control Board (CRWQCB), as <br /> referenced above. <br /> Summary of September 2 and 3, 2003 Quarterly Groundwater Monitoring Event <br /> Field Activit <br /> Number of monitor wells 8 Number of monitor wells sampled 2 <br /> Number of domestic wells I Number of domestic wells sam led 1 <br /> Date monitored and sampled 912103,913103 <br /> Site Hydrology <br /> Average depth to groundwater below 20.81 ft Average increase(+)/decrease(—) in depths to +2.37 feet <br /> monitor well measuring points groundwater since last sampling (deeper) <br /> Approximate groundwater flow direction Northwest <br /> Groundwater Contamination <br /> Wells containing free product None Wells with petroleum hydrocarbon odors 1 <br /> noted <br /> Nature of contamination: Gasoline Range in concentrations: <br /> Constituents Benzcnc 6, IL) <0.5—330 <br /> Toluene(µg/L) <0.5—5.3 <br /> Ethyl Benzene(pg/L) <0.5— 120 <br /> Total Xylenes(}rg/L) <1.0—51 <br /> TPH-G(mg/L) <0.05—4.0 <br /> MTBE(}ig/L) <0.5—21 <br /> 1,2-DCA(µg/L) <0.5—4.l <br /> TBA( L) <5.0—96 <br />