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Tele Analysis Soil and ground water samples were analyzed for the following constituents. • Total Petroleum Hydrocarbons (TPH) as Gasoline and Diesel ' (EPA Method 8015-Modified), and • Benzene, Toluene, Ethylbenzenes, and Xylenes (BTEX) (EPA ' Method 8020) For QA/QC purposes during the ground water sampling, trip blanks were collected and analyzed for TPH-Gasoline and BTEX. ' Investigation Findings The findings of the Phase I and Phase II Investigations at Site have provided information regarding the site geology and hydrogeology and have = ease a characterized the the isite. l and vertical A discussion xtent of of the the petroleum product ' investigation findings is provided below. The information obtained during the installation of monitoring wells and soil borings indicates that the site is underlain by clays, silts and sands. Figures 5-4 and 5-5 represent cross-sections of Former Tank Site #2, the locations of the cross-sections are provided in Figure 5-3 Fill was encountered in varying thicknesses in all of the borings. It ' occurred in the first 2-to-3 feet of MW-1A, MW-3A, MW-5A, B1-A, B2-A, and B4-A, and in the first 7 feet of MW-2A and MW-4A In general, semiconsolidated silty and clayey soils extend from beneath ' the fill to a depth of approximately 10-to-20 feet. Below the silts and clays, unconsolidated localized layers of silt and gravel are present. These sands contai During drilling, ground water was initially encountered at approximate depths ranging between 9.5 and 19 feet below the group surface. After the wells f 5 feet b s�Thereforeound erwas ground waterathe at an approximate dept g site appears to be confined. ' The potentiometric surface defined during the investigations and subsequent quarterly monitoring events suggests that the ground 5-12