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' LABORATORY NARRATIVE <br /> • <br /> TO-3 <br /> Ground Zero Analysis,Inc. <br /> i <br /> ' Workorder#0203131 <br /> ' Two 1 Liter Tedlar Bag samples were received on March 07, 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 and BTEX were 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 convert the <br /> TPH ppmv result to ug/L The method involves concentrating up to 200 rnL 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 Oual fviniz Flag <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]unit <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 Iimit. <br /> M- Reported value may be biased due to apparent matrix interferences <br /> Page 2 of 7 <br />