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LABORATORY NARRATIVE <br /> Modified TO-3 <br /> Geological Technics <br /> Workorder#0206331 <br /> Two 1 Liter Tedlar Bag samples were received on June 19, 2002. The laboratory performed analysis via <br /> modified EPA Method TO-3 for Benzene, Toluene, Ethylbenzene, Xylenes, Methyl tert-Butyl Ether (MTBE), <br />{ and Total Petroleum Hydrocarbons (TPH). BTEX/MTBE was analyzed via GC/PID and TPH via GC/FID. <br /> The TPH results are calculated using the response of Gasoline. A molecular weight of 100 is used to convert the <br /> TPH ppmv result to ug/L. The method involves concentrating up to 200 mL of sample. The concentrated <br /> aliquot is then dry purged to remove water vapor prior to entering the chromatographic system: See the data <br /> sheets for the reporting limits for each compound. <br /> Receiving Notes <br /> There were no receiving discrepancies. <br /> Analytical Notes <br /> There were no analytical discrepancies. <br /> i <br /> Definition of Data Qualifying 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 /> r <br /> File extensions may have been used on the data analysis sheets and indicates <br /> 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 /> i <br /> i <br /> Page 2 of 7 <br />