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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 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 5030/8015 8020 Analyzed 4-5-00 <br /> Attn Tim Cuellar Lab Numbers 2943-1W,2W 3W 4W, 5W Reported 4-11-00 <br /> 1 <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 MW2 MW3 MW MW <br /> 3-31-00 3-31-00 3-31-00 3-31-00 3-31-00 <br />' (ug/L) (ug1L) (ug/L) (uglL) (ug/L) (uglL) <br /> MTBE 050 ND ND 20 ND ND <br /> IBENZENE 050 ND 34 53 ND 210 <br /> TOLUENE 050 ND ND 38 ND ND <br /> ETHYL BENZENE 050 ND ND 38 ND 250 <br /> TOTAL XYLENES 050 ND 066 65 ND 110 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 ND ND 160 ND 4600 <br /> Report Limit Multiplication Factor 1 1 1 1 10 <br /> I <br /> Surrogate% Recovery FID 98 3%1 PID 946% RD 993%1PID 916% FiD 102%rPID 99 a% NO 95 9%1 PID 951/ FO 194/61PID 130% <br /> Instrument ID VAR-GC1 VAR-GCI 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 /> I <br /> ANALYST APPROVED BY <br /> (;::" <br /> Clan J Cane mes C Phillips <br /> rn ironmenfal Lab Director <br />