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CASTLE ANALYTICAL LABORATORY <br />' Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone (209) 384-2930 <br /> Certificate #2079 Fax (209) 384-1507 <br />' Advanced GeoEnvironmental, Inc Client Prosect 10 Cal Fuels Sampled 6-18-97 <br /> of Northern California Reference Number 1151 Received 6-19 97 <br /> 1803 West March Lane, Suite A Sample Description Soil Extracted 6-21-97 <br /> Stockton, CA 95207 Sample Prep/Analysis Method EPA 5030/8015M, 8020 Analyzed 6-21-97 <br />' Attn Tim Cuellar Lab Numbers 1151-16S, 17S, 18S Reported 6-24-97 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br />' WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW9 @ 25 MW9 @ 35 MW9 @ 45 <br /> (mg/kg) (mg/kg) (mg/kg) (mg/kg) <br /> MTBE 0 010 NO ND NO <br /> BENZENE 00050 ND 00063 ND <br /> TOLUENE 00050 NO ND ND <br /> ETHYL BENZENE 00050 NO ND ND <br /> TOTAL XYLENES 00050 NO NO NO <br /> GASOLINE RANGE <br /> HYDROCARBONS 10 NO NO ND <br /> Report Limit Multiplication Factor 1 1 1 <br /> Surrogate % Recovery FID 102%1 NO 103% FID 887%l PID 890% FID 79 7%1 K)799% <br /> Instrument ID VAR GC1 VAR-GC1 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 Jam C Phdlrps <br /> E nmental Lab Director <br />