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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 Nomellini Sampled 07-19-04 <br /> of Northern California Reference Number 7172 Received 07-20-04 <br /> 837 Shaw Road Sample Description Water Extracted 07-23-04 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8015 8020 Analyzed 07-23-04 <br />' Attn Tim Cuellar Lab Numbers 7172-6W,7W 8W Reported 08-02-04 <br /> I TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 6 MW 7 MW 8 <br /> 071904 071904 071904 <br /> (uglL) (uglL) (uglL) (uglL) <br /> MTBE 050 ND ND ND <br /> BENZENE 050 ND 190 ND <br /> TOLUENE 050 ND ND ND <br /> ETHYL BENZENE 050 ND 83 ND <br /> TOTAL XYLENES 050 ND 50 ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 ND 4800 ND <br /> IReport Limit Multiplication f=actor 1 25 1 <br /> I <br /> 1 Surrogate% Recovery FID 109%/PID 109% FID 504%1PI❑966% FID 109%/PID 108% <br /> IInstrument ID VAR-GC1 VAR-GC1 VAR-GC1 <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit- porting Limit x Report Limit Multiplication Factor <br /> I <br /> • APPROVED BY APPROVED BY <br /> clan J Gone JamesIC Phillips <br /> Laboratory Manager Labo tory Director <br />