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1.5 STATUS AND SUPPLY OF SOIL COVER <br /> The soil located within the boundary of the landfill consists <br /> of a fairly complete stratigraphic sequence of Cretaceous, <br /> Tertiary and Quaternary deposits. <br /> Geotechnical investigations performed at the Austin Road <br /> Landfill site have revealed the presence of an upper stratum <br /> of black to dark brown, highly plastic fat clays underlain by <br /> low plastic sandy clays to depths ranging from 8 to 12 feet <br /> below surface grade. <br /> The Austin Road Landfill site is characterized by rather flat <br /> topography, with less that six feet of fall from east to west <br /> over the 5000 foot dimension. <br /> Since commencing operation in 1957, the Austin Road Landfill <br /> has utilized on-site soil for daily and intermediate covers. <br /> Tentative expansion plan for this landfill requires three feet <br /> of soil cover over the existing 135 acre refuse filled area in <br /> addition to four feet of final cover. <br /> Due to this projected deficiency of on-site soil available for <br /> cover, the development and use of alternative sources of cover <br /> is being pursued. <br /> 1.6 PROTECTION AGAINST DUST, ODOR, AND LEACHATE GENERATION <br /> DUST <br /> The use of alternative cover will reduce problems with dust <br /> pollution, odors, and leachate generation. Less dust will <br /> formed by the use of the greenwaste alternative cover material <br /> because less native soil will be disturbed. Dust is currently <br /> controlled by use of a water truck which will continue to <br /> operate but will not be used over the active face on days when <br /> greenwaste cover is applied. <br /> ODOR <br /> Odors may not be controlled as effectively with the greenwaste <br /> cover as with the soil cover. The alternative cover will <br /> minimize the odor problems and with the soil cover on Fridays <br /> of each week will eliminate odor complaints. Odor is not <br /> expected to be a problem at the Austin Road Landfill because <br /> of the remote location. <br /> 6 <br />