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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 Geo Environmental, Inc Client Project ID Top Filling Sampled 3-31-00 <br />' of Northern California Reference Number 2943 Received 4-4-00 <br /> 4005 North Wilson Way Sample Description Water Extracted 4-5-00 <br /> Stockton CA 95205 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 4-5-00 <br />' Attn Tim Cuellar Lab Numbers 2943-6W 7W, 8W Reported 4-I1-00 <br />' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE 1D <br /> VW 1 C VW 2 A VW 3 A <br /> 3-31-00 3-31-00 3-31-00 <br /> (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 ND 990 2300 <br /> BENZENE 050 38000 35000 10000 <br /> TOLUENE 050 45000 14000 13000 <br /> ETHYL BENZENE 050 3900 3100 2100 <br /> TOTAL XYLENES 050 19000 14000 12000 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 250000 150000 96000 <br /> Report Limit Multiplication Factor 2000 1000 500 <br /> Surrogate%Recovery FID 102X1 PID 926A FID 10AY.1PID 874/. FID 103%/PID 979% <br /> Instrument ID VAR-GC1 VAR-GCI 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 J APPROVED BY ` - <br /> Clan J Cone Jam s C Phillips <br /> En ironmental Lab Director <br /> I <br />