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i <br /> CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone (209) 384 2930 <br /> Certificate 312079 Fax (209) 384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Three B's Truck Plaza Sampled See Below <br /> I of Northern California Reference Number 2167 Received 4-1-99 <br /> 4005 North Wilson Way Sample Description Sod Extracted 4-2-99 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 5030801 5M, 8020 Analyzed See Below <br /> Attn Tim Cuellar Lab Numbers 2167-6S, 8S, 9S, 105, 11 S Reported 4-14-99 <br /> I Amended 5-14-99 <br /> JL_ <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW3 10 MW3 30 MW4-10 MW4-25 MW5-10 <br /> (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) <br /> MTBE 0 010 ND ND ND ND ND <br /> BENZENE 00050 52 0 061 ND ND ND <br /> ITOLUENE 00050 46 0 030 ND ND ND <br /> ETHYL BENZENE 00050 88 0 030 ND ND ND <br /> TOTAL XYLENES 00050 40 014 ND ND ND <br /> I GASOLINE RANGE 1 0 920 1 2 ND ND ND <br /> HYDROCARBONS <br /> Report Limit Multiplication Factor 100 1 1 1 1 <br /> Date Sampled 3-29 99 3-29-99 330-99 3 30-99 3-30-99 <br /> IDate Analyzed 4499 4 2-99 44-99 4-4-99 4-4-99 <br /> Surrogate % Recovery r A FID 71 3%1 P@ 72 9% FID 65 B%1 PID 66 2% FID 49 7%f PVD 49 6% FFlp 60 49A 1 PiD 60 3% <br /> IInstrument ID VAR GC1 VAR GC1 VAR GCI 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 /> I <br /> ANALYST tic �t�`"y APPROVED BY <br /> L <br /> Clary J Cone �mes C Phillips <br /> Laboratory Director <br />