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r <br /> f <br /> CONDOR EARTH TECHNOLOGIES INC <br /> 188 Frank West Circle Suite I <br /> y Stockton CA 95206 <br /> _ Phone 209.234.0518 <br /> FAX 209.234.0538 <br /> R www.condorearth.com <br /> CONDOR <br /> FIRST QUARTER GROUNDWATER MONITORING REPORT <br /> MARCH 2005 <br /> Condor Project No.3471E EDO <br /> March 31, 2005 Q <br /> APR <br /> Site Address: Eckert Cold Storage Co. <br /> 757 Moffat Blvd. <br /> Manteca, Californian <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 first quarter 2005 groundwater monitoring event conducted on March <br /> 9, 2005, at the above-referenced Site. Monitoring wells MW-1, MW-4, MW-5, and MW-8 were sampled <br /> as part of this monitoring event. Maps indicating the Site location, monitoring well locations and well- <br /> collar elevations (Site map), and groundwater gradient are included as Figures 1, 2, and 3, Attachment A, <br /> respectively. Also attached are Site background information, historic groundwater monitoring data, field <br /> forms, and laboratory analytical reports for the current monitoring event. This report has been submitted <br /> to the San Joaquin County Environmental Health Department (SJCEHD) and the California Regional <br /> Water Quality Control Board(CRWQCB), as referenced above. <br /> Summary of March 9,2005 Quarterly Groundwater Monitoring Event <br /> Field Activit <br /> Number of monitoring wells 8 Number of monitoring wells sampled A <br /> Number of monitoring wells measured for 8 Date monitored 319105 <br /> water level <br /> Site H drolo <br /> h to groundwater below 16.52 Increase(+)/decrease(—)in average depth to 2.25 <br /> Average dept <br /> monitorin well groundwater <br /> oinoundwater since last monitorin event <br /> p. roximate oundwater flow direction Northwest <br /> Groundwater Contamination <br /> Wells containin frce roduct 0 Wells withetroleum l► drocarbon odors noted 1 <br /> Nature of contamination: Gasoline Range in concentrations: <br /> Constituents Benzene(pg/L) <0.5—310 <br /> Toluene((nFL) <0.5—3.2 <br /> Ethyl Benzene(µglL) <0.5—30 <br /> Xylenes(µg/L) <1.0-20 <br /> TPH-G(mg/L) <0.05—0.75 <br /> MTBE(gg/L) 2.9-16 <br /> 1,2-DCA(Rg/L) <2.0—19 <br /> TBA(µg/L.) 17-190 <br />