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i <br /> CONDOR EARTH TECHNOLOGIES INC <br /> y <br /> Stockton CA 95206 <br /> 188 Frank West Circle Suite I <br /> Phone 209.234.0518 <br /> CONDOR <br /> www.co doFAX g a th com <br /> Sli,[F PC[E� <br /> FIRST QUARTER GROUNDWATER MONITORING REPORT :290YED <br /> MARCH 2004 APR 2 1 2004 <br /> Condor Project No. 3471E ENG'fROiWENT 1-1EgLTN <br /> April 8, 2004 PER MJ'T/SERV10E5 <br /> Site Address: Eckert Cold Storage Co. <br /> 757 Moffat Blvd. <br /> Manteca, California <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 first quarter 2004 groundwater monitoring event conducted on March <br /> 17, 2004 at the above-referenced site. Monitoring wells MW-4 and MW-8, and the sites 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 March 17, 2004 Quarterly Groundwater Monitoring Event <br /> Field Activit <br /> Number of monitoring wells 8 Number of rn nitoring wells sampled 2 <br /> Number of domestic wells l Number of domestic wells sampled 1 <br /> Date monitored and sampled 3117/04 <br /> Site Hydrology <br /> Average depth to groundwater below 19.80 ft Average increase(+)/decrease(—) in depths to F 1.i 1 feet <br /> monitorin well measuring points groundwater since last sampling shallower <br /> A roximate oundwater flow direction North-northwest <br /> Groundwater Contamination <br /> Wells containing free product None Wells with petroleum hydrocarbon odors <br /> noted <br /> Nature of contamination: Gasoline Range in corccntratiors: <br /> Constituents Benzene(pg/L) <0.5— 140 <br /> Ethyl Benzene(lµg/L) <0.5—67 <br /> TPH-G(mg/L) <0.05—0.72 <br /> MTBE(pg/L) X0.5—5.5 <br /> 1,2-DCA(pg/L) <0.5— 14 <br /> TSA( L) 1 <5.0— 13 <br /> i <br />