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r <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 Flag City Chevron Sampled 10-03-02 <br /> of Northern California Reference Number 5125 Received 10-08-02 <br /> 837 Shaw Road Sample Description Water Extracted 10-14-02 <br /> Stockton, CA 95215 Sample Prep/Analysis Method EPA 503018015,8020 Analyzed 10-14-02 <br /> Attn Tim Cuellar Lab Numbers 5125-1 W,2W Reported 10-21-02 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID <br /> P37121 -25 P37/45-49 <br /> (ug/L) (ug/L) (ug/L) <br /> MTBE 050 ND ND <br /> BENZENE 050 ND ND <br /> TOLUENE 050 ND 063 <br /> ETHYLBENZENE 050 ND ND <br /> TOTAL XYLENES 050 ND 056 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 ND ND <br /> Report Limit Multiplication Factor 1 1 <br /> Surrogate%Recovery FID 102%1 PID 102% FID 114%IPID 114% <br /> Instrument ID 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 /> Cla J Cone J Phillips <br /> aboratory Director <br />