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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 GeoEnvironmentat Inc Client Project 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 6789-11W, 12W, 13W, 14W, 15W Reported 04-06-04 <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 10 AW 1A AW 1B AW 2A AW 2B <br /> 031904 031904 031904 031904 031904 <br />' (ug/L) (ug1L) (ug1L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 ND NO ND ND ND <br /> BENZENE 050 NO 640 13 NO 083 <br />' TOLUENE 050 ND 1000 47 NO ND <br /> ETHYL BENZENE 0 50 ND 340 76 ND ND <br />' TOTAL XYLENES 050 ND 2600 120 41 30 <br /> GASOLINE, RANGE <br />' HYDROCARBONS 50 ND 13000 3300 NO 70 <br /> Report Limit Multiplication Factor 1 50 5 1 1 <br /> I <br /> 1 <br /> Surrogate% Recovery FID 101?61PID 103% FID 103%/PID 104% RD 130%rPID 10896 FID 102%/PID 103% FID 110%/PID 11W <br /> Instrument 1D 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 /> iANALYST APPROVED BY <br />' Clan J Cone Ja esPhrtllps <br /> aboratory Director <br /> 1 <br />