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LABORATORY NARRATIVE <br /> Modified TO-3 <br /> Geological Technics <br /> Workorder#0207410 <br /> Two 1 Liter Tedlar Bag samples were received on July 19, 2002. The laboratory performed analysis via <br /> modified EPA Method TO-3 for Benzene, Toluene, Ethylbenzene, Xylenes, Methyl tert-Butyl Ether and Total <br /> F <br /> Petroleum Hydrocarbons (TPH). BTEX/MTBE was analyzed via GC/PID and TPH via GC/FID. The TPH <br /> results are calculated using the response of Gasoline. A molecular weight of 100 is used to convert the TPH <br /> ppmv result to ug/L. The method involves concentrating up to 200 mL of sample. The concentrated aliquot is <br />{ then dry purged to remove water vapor prior to entering the chromatographic system. See the,data sheets for the <br /> reporting limits for each compound. <br /> Receiving Notes <br /> There were no receiving discrepancies. <br /> Analytical Notes <br /> There were no analytical discrepancies. <br /> Yt P <br /> Definition of Data Oualifvin2 Flags <br /> Seven qualifiers may have been used on the data analysis sheets and indicate as follows: <br /> B - Compound present in laboratory blank greater than reporting limit. <br /> �• J- Estimated value. <br /> E- Exceeds instrument calibration range. <br /> S - Saturated peak. <br /> Q- Exceeds quality control limits. <br /> U- Compound analyzed for but not detected above the detection limit. <br /> M- Reported value may be biased due to apparent matrix interferences. <br /> File extensions may have been used on the data analysis sheets and indicates <br /> C; as follows: <br /> a-File was requantified <br /> b-File was quantified by a second column and detector <br />' rl-File was.requantified for the purpose of reissue <br /> 1 <br /> Page 2 of 6 <br />