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I <br /> 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 09-04-02 <br /> of Northern California Reference Number 5034 Received 09-05-02 <br /> 837 Shaw Road Sample Description Water Extracted 09-05-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 5030/8015 8020 Analyzed 09-05-02 <br /> Attn Tim Cuellar Lab Numbers 5034-11W 12W 13W, 14W, 15W Reported 09-12-02 <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 7B MW 7C MW 7D MW 7E VW 113 <br /> 09-04-02 09-04-02 09-04-02 09-04-02 09-04-02 <br /> I (ug/L) (ug1L) (ug/L) (ug/L) (ug/L) (ug1L) <br /> MTBE 050 NO ND NO NO NO <br /> BENZENE 050 50000 79 20 25 31000 <br /> TOLUENE 050 45000 22 55 17 51000 <br /> • ETHYL BENZENE 050 3100 12 NO 20 4200 <br /> TOTAL XYLENES 050 14000 38 15 52 19000 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 190000 150 NO 95 200000 <br /> IReport Limit Multiplication Factor 1000 2 1 1 2000 <br /> I <br /> Surrogate g Recovery FIC)962Af PID 849% FID 88567 PID 8959E FID 106%l plD 104% HD 926%/PID 413% FID 9631AlP14 959% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GCI 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 /> ANALYST APPROVED BY <br /> Clan J Cone dam Ph!!lips <br /> to Oratory Director <br />