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Table 3 , continued Sample Date & Depth of TPH-D TPH-G B T E X TOG Sample ( ft ) (ppm) ( ppm) (ppm) (ppm) ----------------------------------------------------------- BT Center/3 ' N D N D N D N D N D N D N D BT Center/8 ' N D N . D N D N D N D N D N D. BT South/8 ' N D N D N D N . D N D N D 91 ----------------------------------------------------------- Method Detection 1 0 1 0 5 0 5 0 5 . 0 5 0 10 Limit ---------------------------------------------------------- Bldg Tr Building Trench TPH-D Total Petroleum Hydrocarbons as Diesel TPH-G . Total Petroleum Hydrocarbons as Gasoline BTEX .Benzene, toluene , ethylbenzene, total xylenes TOG Total Oil and Grease ppm . . Parts per million ppb Parts per billion ( 1 ppm = 1 , 000 ppb) No samples for certified analyses have been acquired from the soil to be remediated , although it appears that mean concentrations of TPH are less than 1 , 000 ppm With the approval of PHS/EHD , the sub3ect soil will be transported across Grant Line Road to 2360 East Street , placed atop bermed , 6-mil polyethylene sheeting, and treated using static pile aeration technology in accordance with the principles described in the enclosed bio- remediation overview The East Street site will remain fenced and the soil under remediation will be kept sufficiently moist to preclude dust blowing into the shopping center located ad3acent to the treatment area . If EPM is able to began treatment while the weather remains warm, we expect that the soil will be thoroughly remediated within 60 days As our goal is to reduce the levels of contamination to below laboratory detection limits , EPM requests permission to use the remediated soil as clean fill at 2360 East Street Work will begin within two weeks of EPM' s receipt of your authorization to proceed All work will be performed under 6.