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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 Top Filling Sampled 03-06-02 <br />' of Northern California Reference Number 4475 Received 03-07-02 <br /> 837 Shaw Road Sample Description Water Extracted 03-11-02 <br /> Stockton, CA 95215 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 03-11-02 <br /> Attn Tim Cuellar Lab Numbers 4475-16W, 17W 18W, 19W Reported 03-21-02 <br /> I <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br />' WITH BTEX DISTINCTION <br /> I ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE 1D SAMPLE ID <br /> VW-113 VW 1C VW 2A VW 3A <br /> 030602 030602 030602 030602 <br />' (ug/L) (ug/L) (ug/L) (ug/L) (ugIL) <br /> MTBE 0 50 ND ND 1700 870 <br /> BENZENE 060 28000 33000 42000 2100 <br />' TOLUENE 050 57000 55000 21000 830 <br /> ETHYL BENZENE 050 5000 4700 4300 840 <br />' TOTAL XYLENES 050 24000 22000 18000 3000 <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 230000 230000 170000 29000 <br />' Report Limit Multiplication Factor 2000 2000 1000 50 <br />' Surrogate% Recovery <br /> FID 859!67 PID 98 B% FID 884%lPID 98898 FIE)9l<5961 PID 987% FID 777%lPIb 102% <br /> Instrument ID VAR-GC1 VAR-GCI VAR-GC1 VAR-GCI <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 /> Clan J ConeJ e Phillips <br /> aboratory Director <br /> r <br />