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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 06-05-02 <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 Prep/Analysis Method EPA 5030/8015 8020 Analyzed 06-09.02 <br /> Attn Tim Cuellar Lab Numbers 4758-11 W, 12W, 13W, 14W, 15W Reported 06-17-02 <br /> r <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 79 MW 7C MW 7D MW 7E VW 18 <br /> 060502 060502 060502 060502 060502 <br />' (ug/L) (ug/L) (ug/L) (ug1L) (ug/L) (ug/L) <br /> MTBE 0 50 NO NO NO 6 3 ND <br /> BENZENE 050 45000 200 210 130 32000 <br />' TOLUENE 050 34000 120 100 54 57000 <br /> ETHYL BENZENE 050 2300 60 46 46 5800 <br />' TOTAL XYLENES 050 10000 22 17 15 27000 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 170000 590 550 340 310000 <br /> Report Limit Multiplication Factor 1000 5 5 5 2000 <br />' Report Limit Multiplication Factor for Benzene only 50 20 <br /> I <br /> I <br />' Surrogate%Recovery FID 971%JPID 100% FID 11MIPID 120% FID M%IP1D 115% FID 990%/PID 975% Fill 107%7P1D 111% <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 Rep Limit Multiplication Factor <br /> I <br /> ANALYST APPROVED <br /> Clan J Cone s Phillips <br /> ahoratory Director <br />