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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 Nomellirn Sampled 10-20 99 <br /> of Northern California Reference Number 2550 Received 10-21-99 <br /> 4005 North Wilson Way Sample Description Water Extracted 10-23-99 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 10-23-99 <br />' Attn Tim Cuellar Lab Numbers 2550-6W, 7W, 8W, 9W Reported 11-10-99 <br />' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> EW 1 VW 4 VW 3 VW 6 <br />' (ug/L) (uglL) (uglL) (uglL) (uglL) <br /> MTBE 050 ND 120 ND ND <br />' BENZENE 050 1100 1900 2 2 31 <br /> TOLUENE 050 160 180 ND ND <br /> 10 ETHYL BENZENE 060 230 200 28 ND <br /> TOTAL XYLENES 050 390 400 47 ND <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 13000 7500 190 1600 <br />' Report Limit Multiplication Factor 50 50 1 5 <br /> 1 <br /> I <br /> Surrogate % Recovery Fi0117%1 Pit)713% Fit)112%1PID 109% Fl0117%1Pit)115% ;10119%1 PID 117% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR GC1 VAR GC1 <br /> Analytes reported as ND were not detected or below the Practical Ouarititation Limit <br /> Practical Quantitation Limit = Reporting Limit x Report Lunn Multiplication Factor <br />' ANALYST APPROVED BY / <br /> Clary J Cone es —Phrlllps <br /> 011 Environmental Lab Drrecfor <br />