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i <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 10-15-98 <br /> of Northern California Reference Number 1807 Received 10 20 98 <br /> 4005 North Wilson Way Sample Description Soil Extracted 10-20-98 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 503018015M, 8020 Analyzed 10-20-98 <br /> Attn Tim Cuellar Lab Numbers 1807 IS, 2S, 3S Reported 10-2798 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> I <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW10 30 MW10-50 MW10-55 <br /> (mglkg) (mg/kg) (mg/kg) (mg/kg) <br /> MTBE 0 010 ND ND ND <br />' BENZENE 00050 ND ND ND <br /> TOLUENE 00050 NO NO ND <br /> ETHYL BENZENE 00050 ND ND ND <br /> TOTAL XYLENES 00050 ND ND ND <br /> GASOLINE RANGE 1 0 ND ND ND <br /> HYDROCARBONS <br /> Report Limit Multiplication Factor 1 1 1 <br /> Surrogate % Recovery FID-52 9%1 FID-62 7 FID 77 D%!PID 76 8% GID 88 3%!PID-68 9% <br /> Instrument ID VAR GC1 VAR-GCI VAR-GC1 <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 _ ( C(�C_- APPROVED BY <br /> Clam Cone 411 J s C Phil-lips <br /> Laboratory Director <br />