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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 Project ID Cal Fuels Sampled 06-20-02 <br /> I of Northern California Reference Number 4805 Received 06-21-02 <br /> 837 Shaw Road Sample Description Water Extracted 06-25-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 5030/8015 8020 Analyzed 06-25-02 <br /> Attn Tim Cuellar Lab Numbers 4805-6W, 7W,8W,9W, 10W Reported 07-08-02 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br />' WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MWIS MW 7 MW 8 MW 9 MW 10 <br /> 062002 062002 062002 062002 062002 <br />' (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 ND ND ND ND NO <br /> BENZENE 050 ND ND ND ND ND <br /> ITOLUENE 050 ND ND ND ND ND <br /> ETHYL BENZENE 050 ND ND ND ND N❑ <br /> ITOTAL XYLENES 050 10 ND ND NO ND <br /> GASOLINE RANGE <br /> IHYDROCARBONS 50 690 ND ND ND ND <br /> Report Limit Multiplication Factor 1 1 1 1 1 <br /> I <br /> I <br /> Surrogate% Recovery RD 116%IPID 104% FID 950%1RD 960% FID 10MIFID 181% FID 183%1PID 103% FID 987%/PiD 986% <br />' Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit=Reporting Limit x Rep Limit Multiplication Factor <br /> I i <br /> ANALYST APPROVED BY <br /> Clan J Cone J s t7lPhYps <br /> Laboratory Director <br />