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NWWI Soil and groundwater beneath the northwest t side of the former U Ts were impacted by petroleum hydrocarbons. The soil sample analytical results are summarized in Table 3, and the groundwater analytical results are summarized in Table 4, 1,2.3 onitorinell Installations n January 9, 2003, .arnage Environmental published Monitoring Well Installation Report,art, which documented the installation, survey, and initial sampling of three groundwater table monitoring wells MW-1, MW-2 and MW-3), The well locations are shown on Figaro 2. Soils to the total drilling depth of 55 feet mostly consisted of massive clay and silt soils, and relatively thin and discontinuous sand intervals less than five feet thick. During ring drilling, saturated soil was first observed at approximately 55 to 57 feet bg , and the static depth to the groundwater table, ranged from 45.28 to 45.72 feet bgs, As such, groundwater appeared to be present ander semi-confined conditions. The groundwater poter tiometric surface appeared as a regular plane dipping to the north. In seam, 3 of the 15 samples analyzed contained concentrations of petroleum hydrocarbons above laboratory reporting limits, The highest concentrations were observed between 45 and 55 feet within the capillary fringe and zone of groundwater fluctuation: Laterally, the extent of impacted soil appeared to be limited to beneath the former fool faun. Vertically, the extent of impacted soil appeared to be defined: The soil sample analytical results are summarized in Table 3. The groundwater samples collected from all three monitoring cells contained concentrations of petroleum hydrocarbons above laboratory reporting limits. The highest concentrations were detected at`MW-1, which contained 840 micrograms per liter (jig/1) of Total Petroleum roleu Hydrocarbons tTPH -as-,het fuel, 7,700 pgll of TPH-as-gasoline, 1,30 1Agtl of benzene, 450 ggll of toluene, 490 pg/1 of ethylbenzene, and 570 lrgfl of xylenes. The lateral extent of impacted groundwater was not defined.' The groundwater analytical results are summarized in Table 4. 1.2.4 A ditional bite Irvest's anon Can August 3, 2007, Damage Environmental published Additional Site Investigation Deport, which documented the installation of five additional groundwater table monitoring wells (MW-4, MPJ-5, MW-6, MW-7 and 1.3), arra depth-discrete soil arra groundwater sampling from below the groundwater table at one cone penetration test (CPT) location CPT-1). The monitoring well and CPT locations are shown on Figure 2. 5