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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 11-20-97 <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 1346-65, 7S, 8S, 34S Reported 12-3-97 <br />' TOTAL PETROLEUM HYDROCARBONS - GASOLINE RANGE <br /> WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW3 35 MW3-50 MW3-55 MW3-60 <br /> (mg/kg) fmglkg) (mg/kg) (mglkg) (mg/kg) <br />' MTBE 0 010 ND ND ND ND <br /> BENZENE 00050 1 7 023 0 036 0 020 <br />' TOLUENE 00050 21 055 0 082 0 051 <br /> ETHYL BENZENE 00050 17 017 0 033 0017 <br /> TOTAL XYLENES 00050 97 068 012 0 085 <br /> GASOLINE RANGE <br /> HYDROCARBONS 1 0 1100 93 1 6 ND <br />' Report Limit Multiplication Factor 200 2 1 1 <br /> Date Extracted 11-26-97 11-26-97 11-26-97 12-3-97 <br />' Date Analyzed 11-29-97 11-29-97 11-29-97 12-397 <br />' Surrogate % Recovery NA NA Flo 81 2%1 P10885% FIG 73 8%IND 73 1% <br /> Instrument ID VAR-GCI VAR-GC1 VAR-GC1 VAR-GC1 <br /> t 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 /> A <br /> ANALYST APPROVED BYi <br /> 1Z 4 ��/ .-- <br /> Clan J Cone mes C Ph1!ps <br /> Envrronmanta!Lab Director <br />