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I <br /> tLABORATORY NARRATIVE <br /> TO-3 <br /> Ground Zero Analysis,Inc. <br /> Workorder#0205549 <br /> One 1 Liter Tedlar Bag sample was received on May 28, 2002 The laboratory performed analysis via moc fled <br /> I ' EPA Method TO-3 for Methyl tert-Butyl Ether (MTBE), Benzene, Toluene, Ethylbenzene, Xylenes and Total <br /> Petroleum Hydrocarbons (TPH) MTBE and BTEX were 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 /> ' There were no analytical discrepancies <br /> Definition of Data Quatifying 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 lurut <br /> J- Estimated value <br /> E- Exceeds instrument calibration range <br /> ' S - Saturated peak <br /> Q - Exceeds quality control hrnnts <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 I <br /> t <br /> ' Page 2 of 5 <br />