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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 Project ID Pacific Car Wash Sampled 2-18-98 <br />' of Northern California Reference Number 1465 Received 2-19-98 <br /> 4005 North Wilson Way Sample Description Water Extracted 2-20-98 <br /> Stockton CA 95205 Sample Prep/Analysis Method EPA 5030/8015, 8020 Analyzed 2-20-98 <br /> Attn Tim Cuellar Lab Numbers 1465-6W Reported 2-25-98 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID <br /> MW-6/ <br /> 2-1898 <br /> (ug/L) (ug/L) <br /> MTBE 050 32 <br />' BENZENE 0 50 210 <br /> TOLUENE 050 190 <br /> ETHYLBENZENE 050 54 <br /> TOTAL XYLENES 050 290 <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 4500 <br />' Report Limit Multiplication Factor 20 <br /> Surrogate % Recovery FID 1213%i PID 109% <br /> Instrument ID VAR-GCI <br /> Analytes reported as ND were not detected or below the Practical Quantrtation Limit <br /> Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> ti <br /> ANALYST APPROVED BY <br /> Clary J Cone mes C Phillips <br /> Environmental Lab Director <br />