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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 Cueliar Lab Numbers 7172-1W, 2W, 3W 4W, 5W Reported 08-02-04 <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 />' 071904 071904 071904 071904 071904 <br /> (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 ND 190 ND ND 19 <br /> BENZENE 050 11000 7700 4700 720 ND <br /> TOLUENE 050 1700 110 140 ND ND <br /> ETHYL BENZENE 050 1100 650 140 110 ND <br /> TOTAL XYLENES 050 2300 250 450 32 ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 33000 17000 15000 4300 ND <br /> Report Limit Multiplication Factor 500 200 100 25 1 <br /> ISurrogate% Recovery FID 106%/PID 103,6 r16 107%rPID 101% FID 105%JP{D 102% FID 106%/PID 700% F0 105%)PID 105% <br /> IInstrument 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 Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> I <br /> APPROVED BYacAQAPPROVED BY J/-A <br /> Clary Cone Jame C r!rps <br /> Laboratory Manager Lab ratory Director <br />