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CONDOR EARTH TECHNOLOGIES INC <br /> 14�0 <br /> 188 Frank West Circle Suite I <br /> Stockton CA 95206 <br /> Phone 209.234.0518 <br /> FAX 209.234.0538 <br /> CONDOR www.condorearth.com <br /> SECOND QUARTER GROUNDWATER MONITORING REPCE��}/J <br /> FOD <br /> JUNE 2004 �V% <br /> Condor Project No. 3471E AUG 2 5 2004 <br /> July 26,2004 INVIRONMENT <br /> HEALTH <br /> PERMIT/SERVICES <br /> Site Address: Eckert Cold Storage Co. <br /> 757 Moffat Blvd. <br /> Manteca, California <br /> Client: Mr. Pete Thompson <br /> 19901 McHenry 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 second quarter 2004 groundwater monitoring event conducted on June <br /> P q gT g <br /> 23, 2004 at the above-referenced site. Monitoring wells MW-4 and MW-8, and the facility domestic well <br /> DW-1, were sampled as part of this quarterly monitoring event. Maps indicating the site location, <br /> monitoring well locations and well-collar elevations (site map), and groundwater gradient are included as <br /> Figures 1, 2, and 3, Attachment A, respectively. Also attached are site background information, historic <br /> groundwater monitoring data, field forms, and laboratory analytical reports for the current monitoring <br /> event. This report has been submitted to the San Joaquin County Environmental Health Department <br /> (SJCEHD) and the California Regional Water Quality Control Board (CRWQCB), as referenced above. <br /> Summary of June 23, 2004 Quarterly Groundwater Monitoring Event <br /> Field Activit <br /> Number of monitoring wells 8 Number of monitorin wells sampled 2 <br /> Number of domestic wells I i Number of domestic wells sampled 1 <br /> Date monitored and sampled 1 6/23/04 <br /> Site Hydrology <br /> Average depth to groundwater below 21.81 ft Average increase(+)/decrease(—) in depths to +2.01 feet <br /> monitoring well measuring points ruundwater since last sampling( (deeper) <br /> Aeproximate Eoundwater flow direction Northwest <br /> Groundwater Contamination <br /> Wells containing free product one Wells with petroleum hydrocarbon odors 2 <br /> noted <br /> Nature of contamination: Gasoline Range ;-concentrations: <br /> Constituents Benzene(µg/L) <0.5—39 <br /> Toluene((pg/L) <0.5—0.9 <br /> Ethyl Benzene(}ig/L) <0.5—4.7 <br /> TPH-G(mg/L) <0.05—0.41 <br /> MTBE(pg/L) <0.5— 13 <br /> 1,2-DCA(gg/L) <0.5—7.6 <br /> TBA L <5.0—33 <br />