Section 742.310  Outdoor Inhalation Exposure Route

The outdoor inhalation exposure route may be excluded from consideration if:

a)         The requirements in subsection (a)(1) or (a)(2) are met:

1)         An approved engineered barrier is in place that meets the requirements of Subpart K; or

2)         The only contaminants of concern are benzene, toluene, ethylbenzene, and total xylenes, and a demonstration of active biodegradation has been made for benzene, toluene, ethylbenzene, and total xylenes such that no outdoor inhalation exposure will occur.  This demonstration shall be submitted to the Agency for review and approval;

b)         The requirements of Sections 742.300 and 742.305 are met;

            c)         Safety precautions for the construction worker are taken if the Tier 1 construction worker remediation objectives are exceeded; and

d)         An institutional control, in accordance with Subpart J, will be placed on the property.

(Source:  Amended at 37 Ill. Reg. 7506, effective May 15, 2013)