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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services P O Box 1360, Winton, CA 95388 Phone (209) 384-2930 <br /> Certificate #2079 Fax (209) 384 1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Cal Fuels Sampled 12-19-96 <br /> of Northern California Reference Number 975 Received 12-24-96 <br /> 1803 West March Lane, Suite A Sample Description Sod Extracted 12-27-96 <br /> Stockton, CA 95207 Sample Prep/Analysis Method EPA 5030/8015M, 8020 Analyzed 12-30-96 <br /> Attn Tim Cuellar Lab Numbers 975-1 S, 2S, 3S, 4S, 5S Reported 1-7-97 <br /> TOTAL PETROLEUM HYDROCARBONS - GASOLINE RANGE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> B326 B330 B340 8430 8440 <br /> (mg/kg) (mglkg} (mg/kg) (mg/kg) (mg/kg) (mg/kg) <br /> MTBE 00050 NO NO NO NO ND <br /> BENZENE 00050 0 020 NO 1 0 NO NO <br /> TOLUENE 00050 0 042 0 051 21 NO ND <br /> ETHYL BENZENE 00050 0 033 012 0 30 0 018 ND <br />• TOTAL XYLENES 00050 016 089 1 6 NO NO <br /> GASOLINE RANGE <br /> HYDROCARBONS 1 0 70 54 17 5 7 NO <br /> Report Limit Multiplication Factor 1 10 2 1 1 <br /> Surrogate % Recovery FID 77 6%f PVD 69 2% NA NA FID 70 5%1 PID 66 0% FID 69 9%!PID 70 2% <br /> Instrument ID VAR GC1 VAR GC1 VAR-GC1 VAR-GCI VAR-GC1 <br /> Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> • ANALYST APPROVED BY <br /> Clan J Cone Je C Phitrips <br /> nvrronmental Lab Director <br />