Excerpt from Hydrogeologic Data From Four Landfills in Northeastern IllinoisThe landfill is on a flat area adjacent to the Skokie River. Several feet of soil and fill and 5 to 11 feet of sandy clay and silt alluvium form the surficial deposits. The drift is about 110 feet thick and consists mostly of silty clay tills that become more sandy and stony with depth. Sand and silt stringers 6 inches to 2 feet thick and of small lateral extent are interbedded with the till at the base of the drift. Tye bedrock consists of fractured dolomite of Silurian age.Filling was begun at the Elgin site in 1948, and the site was Operated as an Open, burning dump until 1964, when sanitary landfilling was commenced, it is continuing. Probably no appreciable quantities of refuse have been deposited below the top of the zone of saturation, and there is little if any ponding on the fill surface.The site is adjacent to the Fox River on the site of a former gravel pit operation. Two to 3 feet of clayey silt to sandy silt topsoil may cover the drift. The drift is about 60 feet thick and consists of 20 feet of sand and gravel (10 feet have been removed by gravel operation), nearly 40 feet of sandy silt tills, and 2 to 5 feet of basal sand and gravel. A thin layer of fractured dolomite of Silurian age forms the bedrock. Dolomite and shale of the Maquoketa Group lie beneath the Silurian dolomite and crop out immediately west of the site.Filling at the Woodstock site was begun in 1940, and the site was operated as an Open, burning dump until 1965. At that time sanitary landfill ing was commenced and is continuing. In the early stages of filling, refuse was deposited below the top of the zone of saturation. Ponding occurs on the fill surface in wet weather.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.