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� I <br /> I <br /> LABORATORY NARRATIVE <br /> ' Modified TO-3 <br /> Ground Zero Analysis,Inc. <br /> Workorder#0206300 <br /> One 1 Liter Tedlar Bag sample was received on June 17, 2002 The laboratory performed analysis via.modified <br /> EPA Method TO-3 for Benzene, Toluene, Ethylbenzene, Xylenes, Methyl tert-Butyl Ether (MTBE), and Total <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 hnuts for each compound <br /> Receiving Notes <br /> There were no receiving discrepancies <br /> Analytical Notes <br /> ' Dilution was performed on sample KR Influ due to the presence of high level target species <br /> ' Definition of Data OualifyinLy Fla s <br /> 0 Seven qualifiers may have been used on the data analysis sheets and indicate as follows <br /> B - Compound present m 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 /> 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 5 <br />