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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Dave, Atwater, CA 95301 Phone (209) 384-2930 <br /> 1 Certificate #2079 Fax f209) 384 1507 <br /> Advanced Geo Environmental, Inc Client Project ID Pacific Car Wash Sampled 7 29-99 <br /> of Northern California Reference Number 2402 Received 7-30-99 <br /> 4005 North Wilson Way Sample Description Water Extracted 8-5-99 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 5030/8015, 8020 Analyzed 8-5 99 <br /> Attn Tim Cuellar Lab Numbers 2402-1 W, 2W, 3W, 4W, 5W Reported 8 10-99 <br />' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW-31 MW 2/ MW-1/ MW-7/ MW-61 <br /> 7-2999 7-2999 7-29-99 7-29-99 7-29-99 <br />' tug/L) (ug/L) (ug/L) (ug/L) (ug/U (uglL) <br /> MTBE 050 NO ND 370 66 NO <br />' BENZENE 0 50 750 ND 4800 0 89 2500 <br /> TOLUENE 050 2800 270 3400 NO 4100 <br /> ETHYL BENZENE 0 50 1800 1800 980 NO 1300 <br /> TOTAL XYLENES 050 5400 4500 5500 ND 5100 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 41000 65000 50000 ND 59000 <br /> IReport Limit Multiplication Factor 100 500 200 1 500 <br /> Surrogate % Recovery FID 113%1 PID 107% FID 104%IND 101% FID 106%1 PIZ)102% FID 94 9%1 PID 95 4% FID 103%1 PID 102% <br /> Instrument ID VAR-GCI VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> Y �1 <br /> ANALYST APPROVED BY <br /> Clary J Cone James C Phrl tps <br /> r <br /> `Environmental Lab Director <br /> i L <br /> r <br />