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CASTLE ANALYTICAL LABORATORY <br /> I Environmental Testing Services P.O. Box 1360, Winton, CA. 95388 Phone: (209) 384-2930 <br /> Certificate #2079 Fax: (209) 384-1507 <br /> Advanced Geo Environmental, Inc. Client Project 1D: Flag City Chevron Sampled: 7-16-96 <br /> of Northern California Reference Number: 811 Received: 7.17-96 <br /> 1803 West March Lane, Suite A Sample Description: Soil Extracted: 7-22-96 <br /> Stockton, CA 95207 Sample Prep/Analysis Method:.EPA 503018015M, 8020 Analyzed: 7-22-96 <br /> Attn: Tim Cuellar Lab Numbers: 811-IS, 2S, 3S Reported: 7-24-96 <br /> TOTAL PETROLEUM HYDROCARBONS - GASOLINE RANGE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW4@10 MW4@15 MW4@25 <br /> (mg/kgl (mg/kg) (mg/kg1 (mg/kg) <br /> I MTBE 0.0050 ND ND ND <br /> BENZENE 0.0050 ND ND ND <br /> I TOLUENE 0.0050 ND NO ND <br /> ETHYL BENZENE 0.0050 ND ND ND <br /> TOTAL XYLENES 0.0050 NO NO ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 1.0 ND NO ND <br />' Report Limit Multiplication Factor: 1 1 1 <br /> I <br /> I <br /> Surrogate % Recovery: FID:65.44%1?0:66.4% FID:76.2%(PID:79.0% FD:77.7%1 PID09.2% <br /> Instrument ID: VAR-GC1 VAR-GC1 VAR-GC1 <br /> I 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 /> YANALYST: APPROVED BY: <br /> Clari J. Cone mes C. Phillips <br /> Environmental Lab Director <br />