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1 <br /> CASTLE ANALYTICAL LABORAT RY o <br />' Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone (209)384-2930 <br /> Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvFronmental Inc Client Project lD Cal Fuels Sampled 09-23-03 <br />' of Northern California Reference Number 6143 Received 09-25-03 <br /> 837 Shaw Road Sample Description Water Extracted 09-30-03 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 09-30-03 <br /> Attn Tim Cuellar Lab Numbers 6143-16W 17W, 18W 19W Reported 10-08-03 <br /> 1 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br />' WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> AW 1A AW 1B AW 2A AW 2B <br /> 092303 092303 092303 092303 <br />' (ug/L) (uglL) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 ND ND ND ND <br /> BENZENE 050 ND 67 1200 2300 <br /> ITOLUENE 050 ND 37 9000 3600 <br /> ETHYLBENZENE 050 ND 230 1900 1500 <br /> TOTAL XYLENES 050 054 800 16000 6500 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 110 6400 73000 41000 <br /> Report Limit Multiplication Factor 1 20 500 100 <br /> I <br /> Surrogate% Recovery Fib 984%l PID 9a 9% FID 116%/Pli) 104% FID 962%%PID 973% FID 108%1 PID 991% <br /> Instrument ID 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 /> IANALYST APPROVED BY 91/ ::& <br /> Clan J Cone Ja s lrps <br /> oratory Director <br /> /14' <br />