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1 <br /> 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 NomelLni 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 5030 8015 8020 Analyzed 10-23-99 <br />' Attn Tim Cuellar Lab Numbers 2550-1W, 2W, 3W, 4W, 5W Reported 11-1099 <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 7 MW 3 MW 2 MW 1 MW 4 <br />' (ug1L) (ug/L) (uglL) (u91L) (uglL) (ug1L) <br /> MTBE 050 ND ND 220 ND ND <br />' BENZENE 050 1600 14000 12000 1200 1900 <br /> TOLUENE 050 68 4700 280 260 ND <br />' ETHYL BENZENE 0 50 550 990 990 220 280 <br /> TOTAL XYLENES 0 50 380 3800 610 320 66 <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 10000 47000 24000 10000 8600 <br />' Report Limit Multiplication Factor 50 500 200 50 100 <br /> Report Limit Multiplication Factor Benzene Only 500 <br /> 1 <br />' Surrogate % Recovery Nn FID 102%1 PID 105% FID 105%1 PID 106% Flo 102%1 PID 107% NP 113%1PiD 106% <br /> Instrument ID VAR GC1 VAR GCI VAR-GC1 VAR-GCI 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 /> 1 Ak <br />' ANALYST APPROVED BY <br /> Clary J Cone es C Phillips <br /> Envuonmenral Lab Director <br />