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' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone (209) 384-2930 <br /> Certificate #2079 Fax (209) 384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Three B's Truck Plaza Sampled 4 2-99 <br /> of Northern California Reference Number 2173 Received 4-6-99 <br /> 4005 North Wilson Way Sample Description Water Extracted 4-7-99 <br /> Stockton CA 95205 Sample Prep/Analysis Method EPA 5030/8015, 8020 Analyzed 4-7 99 <br /> Am Tim Cuellar Lab Numbers 2173-1 W, 2W, 3W, 4W, 5W Reported 4-16-99 <br /> L_ Amended 5-14-99 <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 11 MW-2/ MW-3/ MW-41 MW-51 <br /> 4-299 42 99 42-99 4-2 99 4-2-99 <br /> (ug/L) (ug/L) (uglU (ug1L) fug/L) (ug/L) <br /> MTBE 050 NO NO ND 18 ND <br /> BENZENE 0 50 1300 2200 3400 3 7 11 <br /> TOLUENE 050 83 120 690 1 5 ND <br /> ETHYL BENZENE 050 68 140 510 1 4 ND <br /> TOTAL XYLENES 050 520 170 2100 71 NO <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 8000 8200 24000 67 970 <br /> IReport Limit Multiplication Factor 50 50 100 1 5 <br /> I <br /> I <br /> Surrogate % Recovery -ID 103%1 PID 99 7% FID 106%1 PID 101% FID 107%1 PID 103% FID 104%1 PID 103% ftp 99 3%I RD 98 0% <br /> Instrument ID VAR GC1 VAR GCI VAR GC1 VAR GC1 VAR GCI <br /> I 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 - `s <br /> Clary J Cone Jam C Phillips <br /> Environmental Lab Director <br /> I <br />