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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 Cal Fuels Sampled 4-29-99 <br /> of Northern California Reference Number 2250 Received 5-4-99 <br />' 4005 North Wilson Way Sample Description Water Extracted 5-6 99 <br /> Stockton, CA 95205 Sample PreplAnalysis Method EPA 503018015, 8020 Analyzed 5-6-99 <br /> Attn Tim Cuellar Lab Numbers 2250-1W, 2W, 3W, 4W, 5W Reported 5-18-99 <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-1/ MW-2/ MW-3/ MW-4/ MW-6/ <br /> 4-29-99 4-29-99 4-29-99 4-29-99 4-29-99 <br />' (ug/L) lug/0 (ug1L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 ND ND ND ND ND <br />' BENZENE 050 27 3500 16000 6900 59 <br /> TOLUENE 050 ND 5700 13000 110 51 <br />'• ETHYL BENZENE 050 13 1600 2600 780 46 <br /> TOTAL XYLENES 0 50 ND 6800 12000 3000 6 0 <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 1300 56000 99000 34000 3200 <br />' Report Limit Multiplication Factor 5 200 1000 200 10 <br /> Surrogate % Recovery FID 109%1 PIO 102% FID 109%1 PID 104% FID 98 8%1 PID 97 F% FID 88 3%1 PID 85 3% FID 131%!PID 110% <br /> Instrument ID VAR-GC1 VAR-GC1 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 ANALYST APPROVED SY % <br /> Clary J Cone J C Phillips <br /> Environmental Lab Director <br /> I <br />