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' LABORATORY NARRATIVE <br /> TO-3 <br /> Ground Zero Analysis, Inc. <br /> Workorder# 0205145 <br /> Two 1 Liter Tedlar Bag samples were received on May 07, 2002 The laboratory performed analysis via <br /> ' modified EPA Method TO-3 for Methyl tert-Butyl Ether, Benzene, Toluene, Ethylbenzene, Xylenes and <br /> 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 <br /> ' convert the TPH ppmv result to ug/L The method involves concentrating up to 200 mL of sample The <br /> concentrated aliquot is then dry purged to remove water vapor prior to entering the chromatographic <br /> system See the data sheets for the reporting limits for each compound <br /> ' Receivine Notes <br /> ' There were no receiving discrepancies <br /> Analytical Notes <br /> ' System peaks were subtracted from the TPH (C5+Hydrocarbons) results of sample KR Efflu <br /> There were no other analytical discrepancies <br /> ' Definition of Data Qualifling 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 /> ' 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 /> 1 <br /> Page 2 of 6 <br />