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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 GeoEnvlronmental Inc Client Project ID top Filling Sampled 12-04-02 <br /> I of Northern California Reference Number 5290 Received 12-05-02 <br /> 837 Shaw Road Sample Description Water Extracted 12-10-02 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8015, 8020 Analyzed 12-10-02 <br /> Attn Tim Cuellar Lab Numbers 5290-1W,2W,3W,4W, 5W Reported 12-23-02 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> IANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 1 MW 2 MW 3 MW 4 MW 5 <br /> 12/04/02 12/04/02 12/04/02 12104102 12/04/02 <br /> I (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 NO 093 230 NO NO <br /> BENZENE 050 ND 98 5100 NO 23 <br /> TOLUENE 050 NO 071 550 NO ND <br /> ETHYLBENZENE 050 NO 31 430 ND 230 <br /> TOTAL XYLENES 050 ND 74 780 ND 230 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 ND 270 13000 ND 2800 <br /> Report Limit Multiplication Factor 1 1 200 1 5 <br /> Report Limit Multiplication Factor for Benzene only 2 <br /> Surrogate%Recovery FID 10D%/PI0 1t2% K10 113%!PIP 109% FID 103%IPID 100% FID 110%/PID 115% FID 214%1PID 152% <br /> Instrument ID VAR-GCI VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 <br /> Analytes reported as NO were not detected or below the Practical Ouantitatton Limit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> ANALYSTlilt APPROVED BY <br /> Clan J Cone J m s 0 Ph1111ps <br /> I 7 aboratory Director <br />