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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(Pacific) Sampled 03-08-02 <br /> of Northern California Reference Number 4487 Received 03-12-02 <br /> 837 Shaw Road Sample Description Water Extracted 03-14-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 503018015,8020 Analyzed 03-14-02 <br /> Attn Tim Cuellar Lab Numbers 4487-16W, 17W Reported 03-2242 <br /> TOTAL.PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> I ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID <br /> AW 2A AW 2B <br /> 030802 030802 <br /> (ug/L) (ug/L) (ug/L) <br /> MTBE 050 ND ND <br /> BENZENE 050 14000 4000 <br /> TOLUENE 050 45000 5800 <br /> ETHYL BENZENE 050 4900 1200 <br /> • TOTAL XYLENES 050 25000 6700 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 190000 41000 <br /> Report Limit Multiplication Factor 1000 500 <br /> 1 <br /> Surrogate%Recovery FID 981%1 PID 995% Flo 104SlPIO 106% <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 R Limit Multiplication Factor <br /> ANALYST' APPROVED BY Clan J Cone me r Irps <br /> Laboratory Director <br />