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r w <br /> Condor Earth Technologies, Inc. <br /> 21663 Brian Lane Sonora CA 95370 (209)532-0361 <br /> 188 Frank West Circle Suite I Stockton CA 95206(209)234-0518 <br /> May 17,2002 Condor Project No 2038 <br /> SECOND QUARTER GROUNDWATERMONITORING REPORT <br /> APRIL 2002 <br /> Site Address Canepa's Car Wash <br /> 248 East Park Street MAY 3 12002 <br /> Stockton, California <br /> ENVIROWENT HEALTH <br /> Client Mr Remo Canepa PERMIT/SERVICES <br /> 1536 North Hunter Street <br /> Stockton, California <br /> Primary Agency Jeffrey C F Wong, San Joaquin County Public Health Servu,es, Environmental <br /> Health Division (PHS/EHD) <br /> Copy to. Marty Hartzel, California Regional Water Quality Control Board (CRWQCB) <br /> • This is a ieport of the results of the second quarter, 2002 groundwater monitoring event conducted on <br /> r April 9, 2002 at the above-referenced site Figures indicating the site location, groundwater elevation <br /> contours, groundwater elevation fluctuations, M'IBF,, and benzene iso-coricentration contours, benzene <br /> concentration with time in well MW-2, and MW-5, and MTBE koneentration with time in MVv 6 (Figures <br /> 1 through 8, respectively) are included as Attachment A Historical site information is mc.luded as <br /> Attachment B Field forms and laboratory analytical results are included as Attachments C and D, <br /> respectively This report has been submitted to the FHS/EHD and the CRWQCB <br /> Summary of April,2002 Quarterly Groundwater Monitoring Results <br /> Field Activity <br /> Number of monitor wells 7 Number of monitor wells sampled 7 <br /> Date(s)monitored T 4/9/2002 <br /> Site Hydrology <br /> Average depth to groundwater below 24 63 feet Average increase(-i)/decrease(—) in depths --0 19 feet <br /> monitor well measuring points(bgs) bgs to groundwater since last sampling Shallower — <br /> Approximate flow direction and Northeast The lowest(&epest)groundwater elevation <br /> groundwater gradient has consistently been measured at monitor <br /> well MW-2 <br /> Groundwater Contamination <br /> Wells containing tree produce I None Wells with detected odors -- 3 <br /> Number of wells with benzene 4 Number of wells with benzene 3 <br /> concentrations below the benzene MCI concentrations at or above benzo ne MCL <br /> Nature of contamination BTEX, Range in concentrations <br /> TPH-G Bencene l4gd) N 5- 10,040 <br /> M1 BE l III I-G(mg/I,) <0 05 -69 <br /> 40) N11 BL(µg/L) 1 5 - 't <br /> iw CONDOR <br />