35 Ill. Adm. Code 742.605
Land Use
Section 742
Section 742.605Â Land Use
a)Â Â Â Â Â Â Â Â Present and post-remediation land use is evaluated in a Tier 2
evaluation. Acceptable exposure factors for the Tier 2 evaluation for
residential, industrial/commercial, and construction worker populations are provided
in the far right column of Appendix C, Tables B, D, and M. Use of exposure
factors different from those in Appendix C, Tables B, D, and M must be approved
by the Agency as part of a Tier 3 evaluation.
b)Â Â Â Â Â Â Â Â If a Tier 2 evaluation is based on an industrial/commercial
property use, then:
1)Â Â Â Â Â Â Â Â Construction worker populations shall also be evaluated,
except for the indoor inhalation exposure route; and
2)Â Â Â Â Â Â Â Â Institutional controls are required in accordance with Subpart
J.
c)Â Â Â Â Â Â Â Â For the indoor inhalation exposure route, institutional
controls under Subpart J are required to develop remediation objectives
pursuant to Appendix C, Table L.