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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 GeoEnwronmental, 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 Description Water Extracted 05-15-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 5030/8015,8020 Analyzed 05-15-02 <br /> Attn Tim Cuellar Lab Numbers 4691-1W,2W, 3W,4W 5W Reported 05-28-02 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br />' WITH BTEX DISTINCTION <br /> I ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 1 MW 2 MW 3 MW 4 MW 5 <br /> 051402 051402 051402 051402 051402 <br />' (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 340 ND ND ND ND <br /> BENZENE 050 6700 270 740 ND ND <br /> TOLUENE G50 610 970 230 ND ND <br /> ETHYL BENZENE 050 510 2900 1500 ND ND <br /> TOTAL XYLENES 050 2400 16000 3700 ND ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 40000 100000 31000 ND ND <br /> Report Limit ARultiphcation Factor 200 250 100 1 1 <br /> Surrogate%Recovery FID 96 1%1 PID 913% FID 101%)PID 102% RD 109%f PID 105% FID 912%/PH)913% FID 921%7PID 960% <br /> Anafng, trnment fin_.---- - VnP_r=r,, ,_. .. `IPP-Grp VAR-GCi ,_.,.._.,'4R-JC' ,.... %rnR_rr' <br /> lytes reported as ND were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit=Reporting Limit x ort Limit Multiplication Factor <br /> ANALYST APPROVED BY <br /> Clan J Cone me C Phillips <br /> Laboratory Director <br />