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i <br /> i CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater, CA 95301 Phone (209)384-2930 <br /> iCertificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmentai, Inc Client Project ID Cal Fuels Sampled 04-04-03 <br /> of Northern California Reference Number 5632 Received 04-08-03 <br /> 837 Shaw Road Sample Description Water Extracted 04-10-03 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018015,8020 Analyzed 04-10-03 <br /> Attn Tim Cuellar Lab Numbers 5632-11W 12W, 13W, 14W 15W Reported 04-18-03 <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 11 MW 12 MW 13A MW 13B MW 13C <br /> 040403 040403 040403 040403 040403 <br />' (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 ND ND ND ND ND <br /> BENZENE 050 ND ND 11 20 6 3 <br />' TOLUENE 050 ND ND 16 40 10 <br /> ie ETHYLBENZENE 0 50 ND ND 1 9 1 5 1 3 <br /> l <br /> TOTAL XYLENES 050 ND ND 42 19 48 <br /> GASOLINE RANGE <br />' HYDROCARBONS 50 ND ND 71 ND 65 <br /> Report Limit Multiplication Factor 1 1 1 1 1 <br /> Surrogate% Recovery FID 877%/PID 888% FID 873,1 f PID 877% FID 877%1 PID 885% FID 108%/PID 101% FID 108%fPID 105% <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 />' ANALYST APPROVED BY 0/^ <br /> Clary J Cone Ja s Ph1 1Ps <br /> L oratory Director <br />