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1 <br />' CASTLE ANALYTICAL C L LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone (209) 364-2930 <br /> Certificate 112079 Fax (209) 384-1507 <br /> Advanced Geo Enviro n mental, Inc Client Project ID Top Filling Sampled 9-9-98 <br />' of Northern California Reference Number 1760 Received 9-11-98 <br /> 4005 North Wilson Way Sample Description Water Extracted 9-12-98 <br /> Stockton CA 95205 Sample Prep/Analysis Method EPA 5030/8015, 8020 Analyzed 9-12-98 <br /> Attn Tim Cuellar Lab Numbers 1760-6W, 7W, BW Reported 9 21-98 <br /> I <br />' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br /> VW-1 Cl VW-2/ VW-3/ <br /> 9-9-98 9-9-98 9-9-98 <br />' (ug/L) (ug/L) (uglL) (ug/L) <br /> MTBE 060 ND 1100 9300 <br />' BENZENE 050 51000 40000 27000 <br /> TOLUENE 050 49000 18000 24000 <br /> ETHYL BENZENE 0 50 4100 3000 4400 <br /> TOTAL XYLENES 050 18000 12000 22000 <br /> IGASOLINE RANGE <br /> HYDROCARBONS 50 230000 130000 210000 <br /> Report Limit Multiplication Factor 2000 1000 2000 <br /> ISurrogate % Recovery FID 101%1 PID 103% FID 101%I PID 183% FID 99 5%1 PID 99 5% <br /> Instrument ID 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 /> ANALYST APPROVED BY <br /> Clary J Cone es C P51111ps <br /> Environmental Lab,Director <br /> I <br />