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t <br />' 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 GeoEnvironmental, Inc Client Project ID Cal Fuels Sampled 03-19-04 <br />' of Northern California Reference Number 6789 Received 03-23-04 <br /> 837 Shaw Road Sample Description Water Extracted 03-29-04 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8015,8020 Analyzed 03-29-04 <br /> Attn Tim Cuellar Lab Numbers 6789-IW 2W 3W 4W, 5W Reported 04-06-04 <br /> I <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> IWITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 8 MW 3 MW 1 MW 6 MW 12 <br /> 031904 031904 031904 031904 031904 <br /> (ug/L) (ug/L) (ug/L) (ug/L) (uglL) (ug/L) <br /> MTBE 050 NO ND NO NO NO <br /> BENZENE 0 50 ND NO NO NO ND <br /> TOLUENE 050 NO NO NO NO NO <br /> ETHYL BENZENE 050 NO NO ND NO NO <br /> lie TOTAL XYLENES 050 NO NO NO NO NO <br /> GASOLINE RANGE <br /> IHYDROCARBONS 50 NO NO 88 100 NO <br /> Report Limit Multiplication Factor 1 1 1 1 1 <br /> I <br /> I <br /> Surrogate%Recovery NO 98 4%1 PID 101% FED 101%)PID 103% FID 1o7%1PID 1119 FID 105%IPID 192°1 FIR 906%lPID 101% <br /> Instrument Ill VAR-GC1 VAR-GCI VAR-GC1 VAR-GC1 VAR-GC1 <br /> Analytes reported as NO were not detectea or below the Practical Quantitation Limit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> APPROVED BY APPROVED BY <br /> Clare J Cone Ja es Phillips <br /> Laboratory Ma ager aboratory Director <br /> I <br />