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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 /> I Advanced GeoEnvironmental, Inc Client Project ID Pacific Car Wash Sampled 7-30-96 <br /> of Northern California Reference Number 828 Received 8 2 96 <br /> 1803 West March Lane, Suite A Sample Description Soil Extracted 8-2-96 <br /> Stockton, CA 95207 Sample Prep/Analysis Method EPA 5030/8015M, 8020 Analyzed 8-2-96 <br /> Attn Tim Cuellar Lab Numbers 828 3S, 4S, 5S, 6S, 7S Reported 8-9 96 <br /> TOTAL PETROLEUM HYDROCARBONS - GASOLINE RANGE <br /> IWITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> P1 20 P1-30 P1-40 P2-20 P2-35 <br /> (mg/kg) (mg/kg) (mglkg) (mg/kg) {mg/kg► (mglkg) <br /> MTBE 00050 ND 00052 00069 ND ND <br /> BENZENE 00050 ND 0 055 0 019 13 1 3 <br /> TOLUENE 00050 ND 0 010 ND 330 33 <br /> ETHYL BENZENE 00050 ND 0 018 00077 90 14 <br /> TOTAL XYLENES 00050 ND 0 074 ND 530 86 <br /> GASOLINE RANGE <br />' HYDROCARBONS 1 0 ND ND ND 6400 1100 <br /> Report Limit Multiplication Factor 1 1 1 1000 200 <br /> I <br /> Surrogate % Recovery FID 85 9%1 PID 87 7% FID 83 5%!PID 83 0% FID 74 1%1 PID 73 9% NA NA <br /> Instrument ID VAR-GC1 VAR GC1 VAR-GC1 VAR-GC1 VAR-GC1 <br /> I <br />' Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> r <br />' ANALYST APPROVED BY <br /> Clan J Cone J es C Phillips <br /> nvrronmental Lab Director <br />