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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 Geo Environmental, Inc Client Project ID Flag City Chevron Sampled 2-25 99 <br /> of Northern California Reference Number 2090 Received 3-2-99 <br /> 4005 North Wilson Way Sample Description Water Extracted 3-3-99 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 3-3 99 <br /> Attn Tim Cuellar Lab Numbers 2090-6W, 7W, 8W Reported 3-10 99 <br /> __J <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW-6B/ MW-7/ DW-11 <br /> 2-25-99 2-25-99 2-25-99 <br /> (ug/L) (ug/L) (ug/L) (ug/L) <br /> IMTBE 050 41 38 76 <br /> BENZENE 050 ND ND NO <br /> TOLUENE 050 NO ND ND <br /> ETHYL BENZENE 050 NO ND NO <br /> TOTAL XYLENES 050 ND ND ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 NO ND ND <br /> Report Limit Multiplication Factor 1 1 1 <br /> E <br /> i <br /> ISurrogate % Recovery FID 106%(No 101% FID 110%1 PID 103% FID 101%!MID 101% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> ANALYST APPROVED BY <br /> Clan J Cone J e Ph lbps <br /> Environmental Lab Director <br />