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1 <br /> 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 Project ID Pacific Car Wash Sampled 11-21-97 <br /> of Northern California Reference Number 1346 Received 11-25-97 <br /> 4005 N Wilson Way Sample Description Soil Extracted See Below <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 5030/8015M, 8020 Analyzed See Below <br />' Attn Tim Cuellar Lab Numbers 1346-16S, 17S, 185, 19S Reported 12-8-97 <br /> TOTAL PETROLEUM HYDROCARBONS - GASOLINE RANGE <br />' WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW6-25 MW6-30 MW6-35 MW6-45 <br /> {mg/kg} (mg/kg) (mg/kg) (mg/kg) (mg/kg) <br />' MTBE 0 010 ND ND ND ND <br /> BENZENE 00050 ND ND 0 080 ND <br />' TOLUENE 00050 ND ND 0 59 0 010 <br /> ETHYL BENZENE 00050 ND 0 026 0 16 ND <br /> TOTAL XYLENES 00050 ND 099 1 3 0 01 5 <br /> GASOLINE RANGE <br />' HYDROCARBONS 10 ND 125 13 ND <br /> Report Limit Multiplication Factor 1 20 2 1 <br />' Date Extracted 12-4-97 11-26-97 11-26-97 11-26-97 <br /> Date Analyzed 12-4-97 12-1-97 12-1-97 12-1-97 <br /> 1 <br />' Surrogate % Recovery FID 86 a%/PID 66 6% NA NA FID 79 1%r PID 77 6% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 VAR-GCI <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br />' Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> ANALYST APPROVED BY ,y, 7Z <br /> Clan J Cone s illrps <br /> Environmental Lab Director <br />