Section 742.915  Formal Risk Assessments

A comprehensive site-specific risk assessment shall demonstrate that contaminants of concern at a site do not pose a significant risk to any human receptor.  All site-specific risk assessments shall be submitted to the Agency for review and approval. A submittal under this Section shall address the following factors:

a)         Whether the risk assessment procedure used is nationally recognized and accepted including, but not limited to, those procedures incorporated by reference in Section 742.210;

b)         Whether the site-specific data reflect actual site conditions;

c)         The adequacy of the investigation of present and post-remediation exposure routes and risks to receptors identified at the site;

d)         The appropriateness of the sampling and analysis;

e)         The adequacy and appropriateness of toxicity information;

f)         The extent of contamination;

g)         Whether the calculations were accurately performed;

h)         Similar-acting chemicals shall be specifically addressed.  At a minimum, the chemicals subject to this requirement are identified in Appendix A, Tables E and F; and

i)          Proposals seeking to modify the target risk consistent with Section 742.900(d) shall address the following factors:

1)         the presence of sensitive populations;

2)         the number of receptors potentially impacted;

3)         the duration of risk at the differing target levels; and

4)         the characteristic of the chemicals of concern.

(Source:  Amended at 21 Ill. Reg. 16391, effective December 8, 1997)