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i <br /> I 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 PreplAnalysis Method EPA 5030/8015, 8020 Analyzed 4-7 99 <br /> Ann Tim Cuellar Lab Numbers 2173 6W, 7W Reported 4 16 99 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID <br /> MW 6/ DW 1 <br /> 4-299 4-2-99 <br /> I (ug/Ll (ug/U fug/0 <br /> MTBE 050 ND ND <br /> IBENZENE 050 590 ND <br /> TOLUENE 050 8 5 ND <br /> ETHYL BENZENE 050 11 ND <br /> TOTAL XYLENES 050 14 ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 3900 ND <br /> Report Limit Multiplication Factor 20 1 <br /> Surrogate % Recovery can 102%1 PID 97 1% FID 103%1 PID 96 9% <br /> Instrument ID VAR GC1 VAR GC1 <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> ANALYST APPROVED SEv,,,,m-P1t-1 <br /> ' ~ f <br /> Clary J Cone es hillips <br /> Lab Drrecror <br />