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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 Three B s Truck Plaza Sampled 3 29 99 <br />' of Northern California Reference Number 2167 Received 4-1 99 <br /> 4005 North Wilson Way Sample Description Soil Extracted 4-2 99 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 5030/8015M 8020 Analyzed See Below <br /> Attn Tim Cuellar Lab Numbers 2167-15, 2S 3S 4S, 5S Reported 4 14-99 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW1 30 MW1-35 MW2-15 MW2-20 MW2-25 <br />' (mg/kg) (mg/kg) (mg/kg) (mg/kg) {mg/kg) (mglkg) <br /> MTBE 0 010 ND ND ND ND ND <br /> BENZENE 00050 00055 ND 0 096 ND 00075 <br />' TOLUENE 00050 ND ND 0 017 ND ND <br /> ETHYL BENZENE 00050 ND ND 0 027 ND ND <br /> TOTAL XYLENES 00050 00067 ND 0 074 00064 ND <br /> GASOLINE RANGE 1 0 ND ND 9 7 ND ND <br /> HYDROCARBONS <br /> Report L'M" Multiplication Factor 1 1 2 1 1 <br /> Date Analyzed 4399 4-2-99 44-99 4 6-99 4-299 <br /> Surrogate % Recovery FiD 586%1 PiD 565% FID 59 6%1 Pit)621% NA FID 653%#PC 671% FID 65 2%1 ND 681% <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 Lima Multiplication Factor <br /> I ' <br /> ANALYST f� [ APPROVED BY <br /> Clary J ConeJ�rf es C Phillips <br /> laboratory Director <br />