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52 <br /> Additional Geologic Information <br /> The proposed site Lies along the border between two different geologic <br /> and hydrologic areas. The "breaks" lie immediately south of the South Platte <br /> Valley Fill Aquifer. A geologic profile of that area is shown. That area is <br /> essentially a valley-filled alluvium which has been deposited in a channel <br /> eroded into the underlying bedrock. The alluvium is comprised of an <br /> unconfined aquifer hydraulically connected to the South Platte River. The <br /> primary composition is of Holocene and Pleistocene layers. <br /> The site also lies along the very northern edge of the northern high <br /> plains or Ogallala Aquifer. This formation consists of semi-consolidated <br /> sand, gravel, silt, clay, and caliche. This formation, in the "breaks" area, <br /> lies on the clays and silts of the White River formation. The saturated <br /> thickness of the Ogallala formation varies all the way from 50 feet in the <br /> area of our site down to 400 feet. A geologic profile of this area is also <br /> shown. <br /> There are no known geologic hazards at this site that might affect the <br /> operation of a landfill. <br /> Tb obtain a more careful analysis of the soils underneath the site, soil <br /> testing was completed. A full copy of that report and the tests results, as <br /> provided by Empire Laboratories, Inc. , are attached and rade a part of this <br /> report. The three borings were taken in the area where the landfill will be <br /> opened and where a majority of the landfilling will occur. The original <br /> purpose of the tests was to confirm whether or not the same typical clay <br /> layers experienced in the road borrow pit operations would be present at this <br /> site. <br /> All three of the boring sites within the landfill area (Borings 1A, 2A <br /> and 3A) all provide evidence that weathered claystone/sandstone does exist <br /> and should be of a great enough thickness to provide adequate protection for <br /> the underground water supply which is significantly below the bottom of any <br /> - - landfill trenches. <br /> The proposed site does NOT lie within a geologic area considered to be <br /> unstable. <br />