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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 CAL Fuels Sampled See Below <br /> of Northern California Reference Number 1662 Received 7-7-98 <br /> 4005 North Wilson Way Sample Description Soil Extracted 7-7-98 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 503018015M, 8020 Analyzed 7-9-98 <br /> Attn Tim Cuellar Lab Numbers 1662-11S. 2S, 3S, 4S, 55 Reported 7-16-98 <br /> TOTAL PETROLEUM HYDROCARBONS - GASOLINE RANGE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> B10-90 B10 95 MW10-25 MW10-40 MW11-25 <br /> (mg/kg) (mg/kg) (mg/kg) (mglkg) {mg/kg) (mg/kg) <br /> MTBE 0 010 ND ND ND ND ND <br /> BENZENE 00050 ND ND ND ND ND <br /> TOLUENE 00050 ND ND ND ND ND <br /> ETHYL BENZENE 00050 ND ND ND ND ND <br /> TOTAL XYLENES 00050 ND ND ND ND ND <br />' GASOLINE RANGE <br /> HYDROCARBONS 10 ND ND ND ND ND <br /> Report Limit Multiplication Factor 1 1 1 1 1 <br /> Date Sampled 7-1 98 7-1 98 7-2-98 7-2-98 7-2-98 <br /> Surrogate % Recovery FID 72 1%/Pip 73 1% FID 69 9%1 PID 68 1% FiD 76 7%1 Pio 74 A% FID 62 0%1 PID 60 9% FID 59 8%1 PID 66 6% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 <br /> Q <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 /> IL�zu <br /> ANALYST APPROVED B <br /> Clary J Cone 5nwron <br /> Phillips { <br /> menial Lab Drrecior <br />