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i <br /> LABORATORY NARRATIVE <br /> ( Modified TO-3 <br /> �✓ Geological Technics <br /> Workorder#0211354 <br /> Two 1 Litef Tedlar Bag samples were received on November 15, 2002. The laboratory performed analysis via <br /> modified EPA Method TO-3 for Methyl tert-Butyl Ether (MTBE), Benzene, Toluene, Ethylbenzene, Xylenes <br /> and Total Petroleum Hydrocarbons (TPH). MTBE/BTEX was analyzed via GC/PID and TPH via GC/FID. The <br /> 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 aliquot <br /> is then dry purged to remove water vapor prior to entering the chromatographic system. See the data sheets for <br /> the reporting limits for each compound. <br /> Receiving Notes <br /> There were no receiving discrepancies. <br /> Analytical Notes <br /> I There were no analytical discrepancies. <br />{ Definition of Data Qualifying Flags <br /> Seven qualifiers may have been used on the data analysis sheets and indicate as follows: <br /> i 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 /> i <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 /> as follows: <br /> I 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 />; <br /> I <br /> ji • <br /> I <br /> i <br /> i <br /> 1. <br /> j - <br /> Page 2 of 7 <br />