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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone (209)384-2930 <br /> Fax (209)384-1507 <br /> Certificate#2079 <br /> Advanced GeoEnwronmental,Inc Client Project 10 Three B's Truck Plaza Sampled 2-25-00 <br /> I of Northern California Reference Number 2854 Received 2-26-00 <br /> 4005 North Wilson Way Sample Description Water Extracted 2-26-00 <br /> Stockton,CA 95205 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 2-26-00 <br /> Attn Tim Cuellar Lab Numbers 2854-1W,2W 3W,4W, 5W Reported 3-9-00 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br />' WITH BTEX DISTINCTION <br /> I ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE M SAMPLE [D <br /> MW 1 MW 2 MW 3 MW 4 MW 5 <br /> 2-25-00 2-25-00 2-25-00 2-25-00 2-25-00 <br /> (ug1L) (ug/L) (ug/L) (ug/L) (u9/L) (ug/L) <br /> MTBE 050 ND ND ND 49 ND <br /> BENZENE 060 440 1600 8100 091 088 <br /> TOLUENE 050 33 450 1100 ND ND <br /> ETHYL BENZENE 050 50 130 1300 ND ND - <br /> TOTALXYLENES 050 <br /> 140 340 3500 064 ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 2600 8100 44000 ND ND <br /> IReport Limit Multiplication Factor 10 50 200 1 1 <br /> Report Limit Multiplication Factor MTBE only 5 <br /> I <br />' Surrogate%Recovery FID 107%1PID 705% FID 987%1PID 701% FID 102%1 PID 103% FID 102%1 PID 102% FID 903%1 PtD 101% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 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 /> C&�Zv' ANALYST APPROVED BY <br /> Clan J Cone -4AS111� hrllrps <br /> nvrronmental Lab Director <br /> f <br />