. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. INDOOR RADON EXPOSURE I I Insufficient Data I Low 0 to â Medium to I High and above Figure 3. Median levels of indoor radon in Illinois plotted by zip codes with levels of 15 pCilL, and areas with fewer measurements, using the ISGS Indoor Radon Data Base shown in Table 68. Please note that these images are extracted from scanned page images that may have been digitally enhance
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. INDOOR RADON EXPOSURE I I Insufficient Data I Low 0 to â Medium to I High and above Figure 3. Median levels of indoor radon in Illinois plotted by zip codes with levels of 15 pCilL, and areas with fewer measurements, using the ISGS Indoor Radon Data Base shown in Table 68. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Dept. of Energy and Natural Resources; Critical Trends Assessment Project. Springfield, Ill. : Ill. Dept. of Energy and Natural Resources
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