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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 Protect ID Top Filling Sampled 05-05-02 <br /> of Northern California Reference Number 4758 Received 06-07-02 <br /> 837 Shaw Road Sample Description Water Extracted 06-09-02 <br /> Stockton CA 95215 Sample PreplAnalysis Method EPA 503018015, 8020 Analyzed 06-09-02 <br /> Attn Tim Cuellar Lab Numbers 4758-6W,7W,8W,9W, 10W Reported 06-17-02 <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 6B MW 6C MW 60 MW 6E <br /> 060502 060502 060502 060502 060502 <br /> (ug/L) (uglL) (uglL) (uglL) (uglL) (uglL) <br /> MTBE 050 19000 500 14 61 55 <br /> BENZENE 050 20000 9100 310 130 130 <br /> TOLUENE 050 10000 1000 220 110 150 <br /> ETHYL BENZENE 050 440 490 110 66 13 <br />' TOTAL XYLENES 050 1900 1700 530 33 52 <br /> GASOLINE RANGE <br />' HYDROCARBONS 50 65000 21000 3200 440 580 <br /> Report Limit Multiplication Factor 500 200 20 5 5 <br /> I <br /> I <br />' Surrogate% Recovery FID 863%1 PID 862% FID 107%1PID 109% FID 113%/PID 1726 FID 127%IPIo 171% FID 107%/PID 109% <br />' Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> I <br />' ANALYST APPROVED BY <br /> Clary J Corse Ja a Phillips <br /> boratory Director <br /> I <br />