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LABORATORY NARRATIVE <br /> Modified TO-3 <br /> Geological Technics <br /> Workorder#0210602 <br /> Two 1 Liter Tedlar Bag samples were received on October 26, 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/F1D. <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 *L. The method involves concentrating up to 200 mL of sample. The concentrated <br /> i 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 /> 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. s <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 /> 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 /> t <br /> Page 2 of 6 <br />