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1 <br /> CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services P O Bax 1360, Winton, CA 95388 Phone (209) 384 2930 <br />' Certificate #2079 Fax (209) 384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Cal Fuels Sampled 4-9-97 <br />' of Northern California Reference Number 1078 Received 4-10 97 <br /> 1803 West March Lane, Suite A Sample Description Water Extracted 4-16-97 <br /> Stockton, CA 95207 Sample Prep/Analysis Method 8015M, 8020 Analyzed 4-16 97 <br /> Attn Tim Cuellar Lab Numbers 1078 1W, 2W, 3W, 4W Reported 4 21-97 <br /> I <br /> TOTAL PETROLEUM HYDROCARBONS - GASOLINE RANGE <br />' WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW-1 MW 2 MW-3 MW 4 <br /> (ug/L) (ug/L) (ugIL) (ugIL) (ug/L) <br /> MTBE 0 50 ND ND ND 56 <br /> BENZENE 050 4900 4900 17000 5000 <br /> TOLUENE 050 280 730 13000 1100 <br /> ETHYL BENZENE 0 50 760 650 3700 1200 <br /> TOTAL XYLENES 050 1400 2800 16000 2400 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 27000 35000 140000 32000 <br /> IReport Limit Multiplication Factor 100 100 500 100 <br /> I <br /> Surrogate % Recovery FID 122%IND 115% FID 110%1 PID 104% FID 103%1 PIi}100% FID-122%1 PI0-112% <br /> instrument ID VAR-GC1 VAR GC1 VAR-GCI VAR-GCI <br /> Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> ANALYST a" APPROVED BY <br /> C art J Cone J es C PhlAp <br /> Environmental Lab Director <br />