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CASTLE ANALYTICAL 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 05-14-02 <br />' of Northern California Reference Number 4691 Received 05-15-02 <br /> 837 Shaw Road Sample Descnption Water Extracted 05-15-02 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 05-15-02 <br /> Attn Tim Cuellar Lab Numbers 4691-6W,7W,8W,9W 10W Reported 05-28-02 <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 6 MW 7 MW 8 MW 9 MW 10A <br /> 051402 051402 051402 051402 051402 <br />' (uglL) (ug/L) (ug/L) (uglL) (ug1L) (ug/L) <br /> MTBE 050 2900 120 12 68 380 <br /> BENZENE 050 910 17 NO 074 11 <br /> iTOLUENE 050 3500 055 NO NO NO <br /> ETHYL BENZENE 050 3000 NO NO NO NO <br /> TOTAL XYLENES 050 20000 NO NO NO NO <br /> i GASOLINE RANGE <br /> HYDROCARBONS 50 100000 380 NO 260 480 <br /> Report Limit Multiplication Factor 500 1 1 1 1 <br /> Report Limit Multiplication Factor for MTBE only 5 20 <br /> i <br /> i <br /> Surrogate%Recovery FID 107%/PID 107% FID 974%1 PID 998% FID 908%I PID 942% FID 97 0%1 PID 858% FID 104%IPID 888% <br /> InStnlment ID VAR-GC' %JAR-GC4 1.1AP-GC1 VAR GCII VAR nr l <br /> Y -UV 1 V 1\-VV I <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 /> f <br /> ANALYST APPROVED BY <br /> Clan J Cone Jame C Willips <br /> L story Director <br />