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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 12-04-02 <br />' of Northern California Reference Number 5290 Received 12-05-02 <br /> 837 Shaw Road Sample Description Water Extracted 12-10-02 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 12-10-02 <br /> Attn Tim Cuellar Lab Numbers 5290-11W, 12W, 13W, 14W, 15W Reported 12-23-02 <br />' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE 1D SAMPLE 1D SAMPLE ID <br /> MW 7A MW 7B MW 7C MW 7D MW 7E <br /> 12/04/02 12/04/02 12/04/02 12/04/02 12/04/02 <br />' <br /> (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 280 ND ND ND ND <br /> BENZENE 050 19000 40000 99 48 110 <br /> TOLUENE 050 9300 41000 59 25 82 <br /> • ETHYLBENZENE 050 550 2800 42 19 57 <br /> TOTAL XYLENES 050 2200 12000 17 76 19 <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 52000 170000 340 160 360 <br />' Report Limit Multiplication Factor 500 1000 25 2 5 <br /> Surrogate°/9 Recovery FD 196%1PID 196% no 101%IP1D lax Ftp 194%1PID 193% KID 994%1P1D 990% FID 199451PIp IW% <br /> Instrument ID VAR-GCi VAR-GCI VAR-GCi VAR-GC1 VAR-GC1 <br />' Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit=Reporting Lima x Report Limit Multiplication Factor <br /> 1 <br /> n 7 <br /> i L' 'Y/JANALYST APPROVED BY ' ;) <br /> Clan J Cone Ja s Phillips <br /> La oratory Director <br />