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' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttfe Drive, Atwater, CA 95301 Phone (209) 384-2930 <br /> yCertificate #2079 Fax (209) 384-1507 <br /> Advanced GeoEnvironmental Inc Client Project ID Pacific Car Wash Sampled 10-9-98 <br /> of Northern California Reference Number 1798 Received 10-14-98 <br /> 4005 North Wilson Way Sample Description Soil Extracted 10-14-98 <br />' Stockton, CA 95205 Sample Prep/Analysis Method EPA 5030/8015M, 8020 Analyzed 10-16-98 <br /> Attn Tim Cuellar Lab Numbers 1798-1S, 2S, 3S,4S, 5S Reported 10-22-98 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW7-30 MW7 35 MW7-40 MW8 30 MW8-40 <br />' (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mglkg) (mg/kg) <br /> MTBE 0 010 ND ND ND ND ND <br />' BENZENE 00050 ND 0 010 0 011 ND ND <br /> TOLUENE= 00050 ND ND ND ND ND <br /> ETHYL BENZENE 00050 ND 0 017 ND ND ND <br /> TOTAL XYLENES 00050 ND 0 052 0 024 ND ND <br /> GASOLINE RANGE 1 0 ND ND ND ND ND <br /> HYDROCARBONS <br />' Report Limit Multiplication Factor 1 1 1 1 1 <br /> Surrogate % Recovery FID-56 2%/PID 56 7% FID-63 8%1 PID-63 6% FID-56 8%I RD-57 2% F1D 56 6%1 PIP 57 D% F1a61 3%!PID-62 e% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 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 /> I � <br /> A <br /> ANALYST (Wi"tza (.•I APPROVED BY <br /> F1a_n J one Joertes C Phillips <br /> Laboratory Director <br /> RE �R77E.D <br /> Nov U 5 1998 <br />