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i <br /> CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater CA 95301 (209}384-2930 <br /> Certificate 9 2480 (209)384-1507 <br /> Advanced Geo Environmental Inc Client Project ID Top Filling Station Sampled 10 12-04 <br /> of Northern California Reference Number 7454 Received 10-13-04 <br /> 837 Shaw Road Sample Description Air Analyzed 10-14-04 <br /> Stockton,CA 95215 Sample Prep/Analysis Method 5030/8015M 8020 Reported 10-20-04 <br /> Attn Tim Cuellar Lab Number 7454-1V <br /> Sample ID Influent <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE RANGE <br /> WITH BTEX DISTINCTION <br /> ANALYTE PQL* PQL' AMOUNT AMOUNT <br /> (ug/L) (ppmv) (ug1L) (ppmv) <br /> 1 MTBE 500 14 ND ND <br /> BENZENE 500 16 580 180 <br /> TOLUENE 500 13 4200 1100 <br /> ETHYL BENZENE 500 11 930 210 <br />' TOTAL XYLENES 500 11 3600 820 <br /> GASOLINE RANGE <br /> HYDROCARBONS 5000 970 43000 10000 <br />' Dilution Factor 100 <br /> 1 <br /> 1 <br />' Instrument ID VAR-GC1 <br /> 'PQL - Practical Quantitation Limit <br />' Analytes reported as ND not detect r below the Practical Quantitation Limit <br /> ANALYST RPPROVED BY -A4 <br /> Clan one Jame C rllips <br /> Laboratory Manage La ratory Director <br /> 1 <br />