March 7, 2013 - The Board, on March 7, 2013, proposed amendments to the Tiered Approach to Corrective Action Objectives (TACO) rules (35 Ill. Adm. Code 742) for second-notice review by the Joint Committee on Administrative Rules (JCAR) (5 ILCS 100/5-40(c) (2010)). The amendments include the addition of a new exposure route under TACO: the indoor inhalation exposure route. To protect building occupants, this exposure route addresses the potential for vapors to migrate into buildings from subsurface volatile chemical contamination, a process commonly known as “vapor intrusion” or “VI.”
Board Adopts Second-Notice Proposal Adding Indoor Inhalation Pathway to TACO
The Board, on March 7, 2013, proposed amendments to the Tiered Approach toCorrective Action Objectives (TACO) rules (35 Ill.
As proposed at first notice, the second-notice amendments also reflect the
addition of 13 chemicals to the TACO tables, update physical and chemical parameters,and revise toxicity values.
First, an
institutional control must be placed on the property whenever the indoor inhalationremediation objectives applied at the site rely upon the assumed presence of a buildingwith a full concrete slab-on-grade or a full concrete basement floor and walls.
The final amendments will provide t...
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