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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 GeoEnvrronmental, Inc Client Project ID Rainwater Car Wash Sampled 10-18-02 <br /> of Northern California Reference Number 5165 Received 10-22-02 <br /> 837 Shaw Road Sample Description Water Extracted 10-25-02 <br /> Stockton, CA 95215 Sample Prep/Analysis Method EPA 503018015,8020 Analyzed 10-25-02 <br /> Attn Tim Cuellar Lab Numbers 5165-1W,2W, 3W Reported 10-31-02 <br /> ' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br /> Influent Effluent GAC-2 <br /> (uglL) (uglL) (uglL) (ug1L) <br /> ' MTBE 050 6900 ND 28 <br /> BENZENE 050 280 ND ND <br /> TOLUENE 050 980 ND ND <br /> ETHYL BENZENE 050 140 ND ND <br /> 10 <br /> TOTAL XYLENES 050 820 ND ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 8700 ND NO <br /> Report Limit Multiplication Factor 50 1 1 <br /> Report Limit Multiplication Factor for MTBE only 500 <br /> Surrogate%Recovery FID 976%1 PID 968% FID%0%1 Pit)976% Flo 92 8%1 AID 93 8% <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=Repotting Limit x R Limit Multiplication Factor <br /> ANALYST APPROVED BY <br /> ' Clan J 6Cane Ja es C Phillips <br /> boratory Director <br /> I� <br /> i li II F ii i i I !I l l i <br /> f <br />