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I CASTLE ANALYTICAL LABORATORY <br />' Environmental Testing Services 2333 Shuttle Drive, Atwater CA 95301 Phone (209) 384 2930 <br /> Certificate #2079 Fax 1209) 384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Pacific Car Wash Sampled 10 12 99 <br />' of Northern California Reference Number 2534 Received 10-15-99 <br /> 4005 North Wilson Way Sample Description Water Extracted 1020-99 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 5030/8015 8020 Analyzed 10 20 99 <br /> Attn Tim Cuellar Lab Numbers 2534 1 W, 2W, 3W, 4W, 5W Reported 10-22-99 <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 MW 10A MW 10B MW MW <br /> 10 1299 10-12 99 10 1299 10 1299 10-12 99 <br />' (ug1L) (uglL) (ugIL) (uglL) (ug/L) (uglL) <br /> MTBE 050 ND ND ND 21 56 <br />' BENZENE 050 ND ND ND ND 68 <br /> TOLUENE 050 ND ND ND ND ND <br />' ETHYL BENZENE 050 ND ND ND ND 82 <br /> TOTAL XYLENES 050 ND ND ND ND 92 <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 ND ND ND ND 800 <br />' Report Limit Multiplication Factor 1 1 1 1 5 <br /> 1 <br />' <br /> Surrogate % Recovery FID 104%1 PID 103% RD 102%I PID 103% FID 142%1 PID 102% FID 103%1 PID 103% Fla 102%1 PID 97 3% <br />' Instrument ID VAR GC1 VAR GC1 VAR GC1 VAR-GC1 VAR GC1 <br /> Analytes reported as ND were not deterred or below the Practical Quantitation Limit <br /> 1 Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> s _ <br /> ANALYST APPROVED BY � <br /> Clan J Cone mes C Phr!lrps <br /> Envrronmenral Lab Drrector <br />