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I CASTLE ANALYTICAL LABORATORY <br /> • Environmental Testing Seances 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 03-06-02 <br /> of Northern California Reference Number 4475 Received 03-07-02 <br /> a37 Shaw Road Sample Description Water Extracted 03-11-02 <br /> Stockton, CA 95215 Sample Prep/Analysis Method EPA 5030/8015, 8020 Analyzed 03-11-G2 <br /> Attn Tim Cuellar Lab Numbers 4475-6W,7W,8W,9W, 10W Reported 03-21-02 <br /> I <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 6A MW 613 MW 6C MW 6D MW 6E <br /> 030602 030602 030602 030602 030602 <br />' (ug/L) (ug/L) (ugJL) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 37000 530 ND 31 088 <br /> BENZENE 050 26000 18000 270 22 17 <br />' TOLUENE 050 22000 1600 340 23 14 <br />'• ETHYL BENZENE 150 1700 1200 170 34 26 <br /> TOTAL XYLENES 050 8000 3600 860 13 11 <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 130000 42000 5300 140 96 <br />' Report Limit Multiplication Factor 2000 500 20 1 1 <br /> 1 <br /> t <br /> Surrogate% Recovery FID 783%1FMO 751% FID 895%!PI0 976% FID ia¢x!P[b 969% FID 191%/PID 994% FID 961%!PID 973X <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GCI VAR-GC1 VAR-GC1 <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br />' Practical Quantitation Lima= Reporting Lima x Report Limit Multiplication Factor <br /> r <br />' ANALYST APPROVED BYC' <br /> Clan J Cone Jam Phillips <br /> �boratory <br /> Director <br /> 1 <br />