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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 Geo Environmental, Inc Client Project ID Cal Fuels Sampled See Below <br /> of Northern California Reference Number 975 Received 12-24 96 <br /> 1803 West March Lane, Suite A Sample Description Soil Extracted 12-27-96 <br /> Stockton, CA 95207 Sample Prep/Analysis Method EPA 5030/8015M, 8020 Analyzed 12-31-96 <br /> AM Tim Cuellar Lab Numbers 975-6S, 7S, 8S, 9S, 10S 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 0 <br /> B530 6540 B625 6630 6640 <br /> (mg/kg) (mg/kg) {mg/kg) (mg/kg) (mg/kg) {mg/kg) <br /> MTBE 00050 ND ND ND ND ND <br /> BENZENE 00050 ND ND ND ND 0 94 <br /> TOLUENE 00050 ND ND ND ND ND <br /> ETHYL BENZENE 00050 ND ND ND ND 010 <br /> TOTAL XYLENES 00050 ND ND ND ND Oil <br /> GASOLINE RANGE <br /> HYDROCARBONS 10 ND ND ND ND 50 <br /> Report Limit Multiplication Factor 1 1 1 1 1 <br /> Date Sampled 12 23-96 12 23-96 12 20-96 12-2096 12-2096 <br /> Surrogate % Recovery FID 79 2%!PID 79 2% FID 80 0%!PID 80 2% FID 54 7%1 PID 54 7% FID 73 2%!PID 73 6% FID 63 6%1 PID 57 8% <br /> Instrument 10 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 /> r <br />• ANALYST � APPROVED BY � <br /> Clan J Cone mes Chi llips <br /> Environmental Lab Director <br />