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QUARTERLY MONITORING REPORT April 1998 <br /> CANEPA CAR WASH <br /> 6230 Pacific Avenue,,Stockton,CA <br /> May 26 1998 <br /> I Page -5 <br /> limits In any of the samples analyzed No TPH-G, gasoline oxygenates/additives, or BTEX were <br /> detected at or above the laboratory reported detection limits in the groundwater samples collected from <br /> MW-5, MW-6, MW-7 or MW-8 Groundwater samples collected from MW-1, MW-2, MW-4, and SV-2 <br /> contained TPH-G or one or more BTEX components above the laboratory detection limits In addition, <br /> MTBE was detected in the groundwater samples collected from MW-1, MW-2, MW-3, and SV-2 <br /> 6 0 RECOMMENDATIONS <br />' Condor recommends that additional Investigation be conducted to further characterize the extent of <br /> contamination at the site in addition to the soil borings recently installed as described in the Site <br /> Background Further characterization should include the installation of additional monitor wells The <br /> existing monitor wells at the site have a screened interval well below the current water table and provide <br /> little information pertaming to the vadose zone/groundwater Interface We further recommend that <br /> MTBE be the only gasoline oxygenates/additive analyzed for This is the third consecutive monitoring <br /> event that no gasoline oxygenates/additives, other the MTBE, were detected at or above the laboratory <br /> reported detection limit in the samples from the monitor wells <br /> The next quarterly monitoring event is scheduled for July 1998 If you need additional information or <br /> have any questions, please contact us at(209) 234-0518 <br /> Respectfully submitted, <br /> CONDOR EARTH TECHNOLOGIES, INC <br /> D Gkp- <br /> ®� DONALD F KRESSE <br /> R David Meade NO 6430 nald F Kresse <br /> Project Geologist (P Q, alifornia Registered <br /> eologist#6430 <br /> FOF CE1L�F� <br /> I <br /> I <br /> l <br /> �� CONDOR <br />