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Di Salvo-Lathrop MW I Report <br /> June 28, 1995 <br /> Page-7- <br /> respectively. Laboratory analyses of the groundwater sample collected from MW I detected diesel at a <br /> concentration of 0.40 mg/l. BTEX constituents were not detected at or above the reported laboratory detection <br /> limits. <br /> y Based on the analytical results of the soil sample collected from MWI and previous soil samples <br /> collected from the site, the lateral extent of soil contamination has been evaluated at the site. Laboratory <br /> analyses of the groundwater sample indicated that the shallow water table at the site has been impacted by <br /> diesel. SJCPHS,EHD indicated the groundwater gradient at the Sharpe Army Depot, located immediately <br /> north of the Di Salvo site, is consistently toward the northwest. Condor recommends that because of the very <br /> low concentration of diesel in the groundwater sample collected from MW1, that MWi be purged of several <br /> hundred gallons of water in an attempt to evaluate the magnitude of groundwater contamination at the site. <br /> The removal of several hundred gallons of groundwater from MW 1 could potentially remove the full extent of <br /> groundwater contamination from the site. Likewise, the removal of several hundred gallons of groundwater <br /> from MW1 has the potential of drawing higher concentrations of groundwater contamination into the well, <br /> thereby indicating that additional investigation may be necessary. The selected coarse of action to investigate <br /> the potential extent of groundwater contamination at the site should be presented to SJCPHS,EHD for <br /> comment and approval. if you have any questions or need additional information, please contact Condor at <br /> (209) 668-9234. <br /> Respectfully submitted, <br /> p r.-. <br /> T CIVIC_ e�/ <br /> Marti R. Crum Robert J. Job, P. f OF CW <br /> Gedlogist California Registered�� <br /> Professional Engineer, Civil <br /> 451592 <br /> D1 SALV0414MMWI.RPT <br /> �� CONDOR <br />