. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. Landfill locations are raprasantad by a ona mila buttered area. TTils is consistent wltt^ USEPA area-of-potantlal ttsK esttmatas and location accuracy studies for landfills in Illinois. Figure title D Risk Model of 1988), and the USEPA joint study on landfill location proximity to wetlands (Lambou et al. 1988) all provided support for repre- senting each landfill in the database as a one square
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. Landfill locations are raprasantad by a ona mila buttered area. TTils is consistent wltt^ USEPA area-of-potantlal ttsK esttmatas and location accuracy studies for landfills in Illinois. Figure title D Risk Model of 1988), and the USEPA joint study on landfill location proximity to wetlands (Lambou et al. 1988) all provided support for repre- senting each landfill in the database as a one square mile area. This one mile region was applied to deter- mine proximity of landfills to environmentally critical areas. Potential for Contamination The ISGS mapped the relative potential for contamination for aquifers statewide (Figure ) by rating sequences of geologic materials for the sus- ceptibility of its water-yielding materials to contamination from waste-disposal practices. The vertical sequences were rated by assessing the relative capacities of the earth materials to accept, transmit, restrict, or remove contaminants from waste effluents (Berg et al. 1984). It is impossible to assess the accuracy of this interpretive map, which is used prin- cipally to assist in regional, not site specific, assessments. It was used in this analysis to give an indication of how many existing landfills may be located in areas with high potential for shallow aqui- fer contamination. Figure represents an estimate of the proportion of known Illinois landfill sites that faU into four categories of contamination potential. These four categories were summarized from classifications found in Berg et al. (1984). Distribution of Illinois Landfills by Potential for Contamination â Highest Potential G O DLowest Potential Source: HV/RIC Inventory ofLandbased Disposal Sites, 1989; ISGS Aquifer Recharge Mapping Figure Public and Private Well Locations The ISGS and
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