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I <br /> i 1 1 I <br /> LABORATORY NARRATIVE <br /> j 1 TO-3 <br /> Ground Zero Analysis,Inc <br /> ' Workorder#0204027 <br /> 1 Two 1 Liter Tedlar Bag samples were received on April 02, 2002 The laboratory performed analysis via <br /> modified EPA Method TO-3 for Methyl tert-Butyl Ether, Benzene, Toluene, Ethylbenzene, Xylenes and Total <br /> Petroleum Hydrocarbons (TPH) BTEX and MTBE 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 /> 1 the reporting limits for each compound <br /> Receiving Notes <br /> ' There were no receiving discrepancies <br /> 1 Analytical Notes <br /> System peaks were subtracted from the TPH(C5+Hydrocarbons)results of sample KR Efflu <br /> tThere were no analytical discrepancies <br /> 1 Definition of Data Oualifyin2 Flats <br /> Seven qualifiers may have been used on the data analysis sheets and indicate as follows <br /> 1 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 /> 1 M- Reported value may be biased due to apparent matrix interferences <br /> 1 <br /> 1 <br /> i <br /> 1 <br /> Page 2 of 6 <br /> 1 II <br />