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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 Top Filling Sampled 6-14-99 <br /> of Northern California Reference Number 2314 Received 6-16 99 <br /> 4005 North Wilson Way Sample Description Water Extracted 6-16 99 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 6-16 99 <br /> Attn Tim Cuellar Lab Numbers 2314-6W, 7W Reported 6-23-99 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID <br /> VW-21 VW-31 <br /> 6-14-99 6-1499 <br /> (ug/L) (ug/L) {ug&L <br /> MTBE 050 1 600 1 100 <br /> BENZENE 050 48000 22000 <br /> TOLUENE 050 24000 26000 <br /> ETHYL BENZENE 050 3300 2700 <br /> TOTAL XYLENES 050 14000 14000 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 180000 140000 <br /> Report Limit Multiplication Factor 1 000 2000 <br /> Surrogate % Recovery FID 109%1 PID 105% FID 109%1 PID 108% <br /> Instrument ID VAR GC1 VAR-GCI <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 /> AN APPROVED BY \ <br /> Clary J Cone ';JJanes_t7 Phillips <br /> Environmental Lab Director <br />