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' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone (209)384-2930 <br />' Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Protect ID Cal Fuels Sampled 03-19-04 <br />' of Northern California Reference Number 6789 Received 03-23-04 <br /> 837 Shaw Road Sample Description Water Extracted 03-29-04 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 03-29-04 <br /> Attn Tim Cuellar Lab Numbers 6789-16W, 17W, 18W, 19W Reported 04-06-04 <br /> r <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br />' WITH STEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 13A MW 13B MW 13C MW 2 <br /> 031904 031904 031904 031904 <br />' (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 0 50 ND ND ND ND <br /> BENZENE 050 32 26 300 75 <br /> rTOLUENE 050 110 77 780 NO <br /> ETHYL BENZENE 050 12 91 69 23 <br /> r� TOTAL XYLENES 050 47 34 280 34 <br /> GASOLINE RANGE <br /> rHYDROCARBONS 50 420 300 2900 530 <br /> Report Limit Multiplication Factor 5 5 20 1 <br /> r <br /> r <br /> r <br /> Surrogate%Recovery FID 102%IPID 107% FID 1WAMD 105% FI0 101%1PID tut% Fib 110%lPID 106% <br /> Instrument ID VAR-GCI 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 <br /> Clan J Cone Ja es C Phillips <br /> boratory Director <br />