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CASTLE ANALYTICAL LABORATORY <br /> I 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 14-26-02 <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 5269-6W,7W,8W 9W 10W Reported 12-06-02 <br /> I <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 MW7 MW8 MW9 MW10A <br /> 112502 142502 112502 112502 112502 <br /> (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (uglL) <br /> MTBE 050 1100 17 ND 42 500 <br /> BENZENE 050 700 14 NO 270 ND <br /> TOLUENE 05G 4300 ND ND 16 NO <br /> ETHYLBENZENE 050 3000 NO NO 260 NO <br /> TOTAL XYLENES 050 24000 ND ND 110 ND <br /> I GASOLINE RANGE <br /> HYDROCARBONS 50 96000 270 ND 4000 190 <br /> I Report Limit Multiplication Factor 200 1 1 5 1 <br /> Report Limit Multiplication Factor MTBE only 20 <br /> I <br /> I Surrogate%Recovery FID 117%IPID 113% FID 104%/PID 100% FID 993%/PID gam FID 296%IPID 177% FID 994%l PID 996% <br /> Instrument ID VAR-GC1 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 /> ANALYST APPROVED BY ( / <br /> Can Cone Ja a t1TtpS <br /> Iboratory Director <br />