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k4 KLEINFELDER <br /> 5 LABORATORY RESULTS <br /> A total of four groundwater samples collected from monitonng wells MW-1 through MW-4 were <br /> submitted for the following analysis during the Fourth 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 26 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 0 87 mg/l Ethylbenzene and total xylene were detected in groundwater <br /> collected from MW-1 at 1 3 µg/1 and 0 57 µg/l, respectively Benzene and toluene were not <br /> detected in the groundwater sample collected from MW-1 None of the requested petroleum <br /> analytes were detected in groundwater samples collected from perimeter monitoring wells MW- <br /> 2, MW-3 or MW-4 The laboratory analytical results are included in Appendix C <br /> 1 <br /> 28209 T03/ST05R277/DH Iv Page 8 of i I <br /> U 2005, Klcinfcldci, Inc March 10,2005 <br />