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kn KLEINFELDER <br /> 5. LABORATORY RESULTS <br />' A total of four groundwater samples collected from monitoring wells MW-1 through MW-4 were <br /> submitted for the following analysis during the Third Quarter 2004 sampling event <br /> • Benzene, Toluene, Ethylbenzene, Total Xylenes by EPA Method 8260 (BTEX), <br />' + Total Extractable Petroleum Hydrocarbons as referenced to Diesel (TPH-D) by EPA <br /> Method 8015B, and <br />' • Total Purgeable Petroleum Hydrocarbons as referenced to Gasoline (TPH-G) by EPA <br /> Method 8015B <br /> ' For a summary of these findings, and previous groundwater sampling results, refer to Table 2 <br /> included in the Appendix of this report In summary, TPH-D was detected from the groundwater <br /> sample collected from MW-1 at a concentration of 24 mg/l The laboratory noted that the TPH- <br /> D concentration also included lighter-end hydrocarbons TPH-G was also detected in this <br /> groundwater sample at 1 1 mg/l Ethylbenzene was detected in groundwater collected from MW- <br /> 1 at 0 79 µg/l Benzene, toluene, and total xylenes were not detected in the groundwater sample <br /> collected from MW-1 None of the requested petroleum analytes were detected in groundwater <br /> samples collected from perimeter monitoring wells MW-2, MW-3 or MW-4 A complete <br /> summary of our laboratory analytical results is included as Appendix C <br /> 1 <br /> 1 <br /> 1 <br /> 28209 T03/ST04R1402/DH Iv Page 8 of 1 I <br /> 0 2004,Kleinfelder,Inc October 20,2004 <br />