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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone 1209) 384-2930 <br /> Certificate X12079 Fax (209) 384-1507 <br /> I Advanced GeoEnvironmental, Inc Client Project ID Top Filling Sampled 1013-99 <br /> of Northern California Reference Number 2535 Received 10-15-99 <br /> 4005 North Wilson Way Sample Description Water Extracted 10-20-99 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 5030/8015 8020 Analyzed 10-20-99 <br /> IAttn Tim Cuellar Lab Numbers 2535-1 W, 2W, 3W, 4W, 5W Reported 10-22-99 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 4 MW 3 MW 2 MW 1 MW 5 <br /> 10-139 10 1 3 9 10-139 10-13-9 10-13-9 <br /> fug/L1 (ug/La (ugIL1 (ug/L) (ug1L) (uglL) <br /> MTBE 050 NO 9 6 1 3 NO NO <br /> IBENZENE 050 ND 41 1 8 ND 300 <br /> TOLUENE 050 ND ND ND ND NO <br /> ETHYL BENZENE 050 ND 052 NO ND 280 <br />' TOTAL XYLENES 010 NO ND ND ND 82 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 NO NO ND NO 4800 <br />' Report Limit Multiplication Factor 1 1 1 1 1 <br /> I <br /> Surrogate % Recovery FID 100%l PID 103% FID 1D8%tPID 107% FID 101%!PID 99 9% nD 97 5%1 PID 98 3% FID 239%1 PID 174% <br /> Instrument ID VAR GC1 VAR GC1 VAR-GC1 VAR GCS 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 Conemes C Phr rps <br /> Environmental Lab Director <br /> I <br />