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CASTLE ANALYTICAL LABORATORY <br />' Environmental Testing Services P O Box 1360, Winton, CA 95388 Phone 1209) 384-2930 <br /> Certificate #2079 Fax (209) 384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Top Filling Station Sampled 7-18-96 <br />' of Northern California Reference Number 815 Received 7-19-96 <br /> 1803 West March Lane, Suite A Sample Description Water Extracted 7-24-96 <br /> Stockton, CA 95207 Sample Prep/Analysis Method 8015M, 8020 Analyzed 7-24-96 <br /> Attn Tim Cuellar Lab Numbers 815-1 W, 2W, 3W, 4W, 5W Reported 7-29-96 <br />' TOTAL PETROLEUM HYDROCARBONS - GASOLINE RANGE <br /> WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE 1D <br /> MW-1 MW-2 MW-3 MW-4 MW-5 <br />' (ug/L) (ug/L) (ug/L) lug/L) (ug/L) (ug/L) <br /> MTBE 050 ND 1 9 15 ND ND <br />' BENZENE 0 50 ND 1 4 190 ND 1600 <br /> TOLUENE 050 NO ND 19 ND 64 <br /> ETHYL BENZENE 050 ND 0 69 47 ND 760 <br /> TOTAL XYLENES 050 NO 22 37 080 520 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 ND ND 740 ND 12000 <br />' Report Limit Multiplication Factor 10 ; i 5 1 50 <br /> " <br /> Unknown component extinguishes FID flame at multiplication factor 1 <br /> /p <br /> Surrogate Recovery FID 101%1 PIP 101% FID 103%fP10102% FID-111%I PIQ104% NA FID121%/PI0111% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR GC1 VAR-GCI VAR-GC1 <br /> Practical Quantitat,on Limit = Reporting Limit x Report Limit Multiplication Factor <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> t <br /> ANALYSTY11-1APPROVED BY <br /> Clary J Cone ames C Phillips <br /> Environmental Lab Director <br />