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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 112079 Fax {209) 384-1507 <br /> IAdvanced GeoEnvironmental, Inc Client Project ID Top Filling Sampled 6-12 98 <br /> of Northern California Reference Number 1630 Received 6-16-98 <br /> 4005 North Wilson Way Sample Description Water Extracted 6-19-98 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 5030/8015, 8020 Analyzed 6-19-98 <br /> Ann Tim Cuellar Lab Numbers 1630-6W, 7W, 8W Reported 6-23-98 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br />{ VW-1C VW-2 VW-3 <br /> 1{ 6-12-98 6-12-98 6-12-98 <br /> (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 0 50 ND 1100 1400 <br /> BENZENE 050 48000 46000 38000 <br /> TOLUENE 050 47000 28000 46000 <br /> ETHYL BENZENE 050 4200 3600 3800 <br /> TOTAL XYLENES 050 19000 15000 19000 <br /> GASOLINE RANGE <br /> IHYDROCARBONS 50 250000 200000 240000 <br /> Report Limit Multiplication Factor 2000 1000 2000 <br /> I <br /> Surrogate % Recovery FID 100%r PID 99 4% FID 105%1 PID 104% FID 96 2%1 PID 96 01% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> EPractical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> ANALYST APPROVED BY <br /> Clad J Cone J s Phi Irps <br /> Environmental Lab Director <br /> I <br />