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1 <br />' 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 Top Filling Sampled 06-05-02 <br />' of Northern California Reference Number 4758 Received 06-07-02 <br /> 837 Shaw Road Sample Description Water Extracted 06-09-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 06-09-02 <br /> Attn Tim Cuellar Lab Numbers 4758-1W,2W,3W,4W 5W Reported 06-17-02 <br /> TOTAL,PETROLEUM HYDROCARBONS -GASOLINE <br />' WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 1 MW 2 MW 3 MW 4 MW 5 <br /> 060502 060502 060502 060502 060502 <br />' (uglL) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 0 50 NO 3 8' 130 ND ND <br /> BENZENE 050 ND 97 890 NO 130 <br />' TOLUENE 050 NO 098 11 060 27 <br /> ETHYL BENZENE 050 NO ND 25 ND 180 <br /> TOTAL XYLENES 050 ND 16 50 ND 81 <br /> GASOLINE RANGE <br />' HYDROCARBONS 50 ND 98 1500 ND 2800 <br /> Report Limit Multiplication Factor 1 1 5 1 5 <br />' Report Limit Multiplication Factor for Benzene only 20 <br /> I `Interferent peak present, see 8260 MTBE result <br /> Surrogate%Recovery FID 102%lPID 10696 FID 967%1 PID 104% FID 133%l PIE)124% FID 100%1PID 106% Flo 211%/PID 159% <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 Quantitabon Limit=Reporting Limit x Report Limit Multiplication Factor <br /> ANALYST APPROVED BY <br /> Clan J Cone Jeff hdh1 s <br /> oratory Director <br />