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CASTLE ANALYTICAL NAL CAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater, CA 95301 Phone (209)384-2930 <br /> Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnviron mental Inc Client Project ID Pacific Car Wash Sampled 11-25-02 <br />' of Northern California Reference Number 5269 Received 11-26-02 <br /> 837 Shaw Road Sample Description Water Extracted 11-27-02 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 11-27-02 <br /> Attn Tim Cuellar Lab Numbers 5269-11 W, 12W, 13W Reported 12-06-02 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 10B MW 11 MW 12 <br /> 112502 112502 112502 <br /> (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 62 18 ND <br /> BENZENE 050 NO NO NO <br /> TOLUENE 050 NO NO NO <br /> ETHYLSENZENE 050 NO NO NO <br /> TOTAL XYLENES 050 ND NO NO <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 ND NO NO <br /> Report Limit Multiplication Factor 1 1 1 <br /> Report Limit Multiplication Factor MTBE only 2 <br /> Surrogate %Recovery FID 996%1PID 815% FSD 101%1PID 100% FID 975%/PID 969% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit= Reporting Limit x art Fm it Multiplication Factor <br /> I(A <br /> ANALYST APPROVED BY <br /> Clary J Cone JaPhillips <br /> oratory Director <br />