A Tier 3 assessment is a risk-based analysis to develop values for potential direct and indirect exposure pathways at the point or points of exposure based on site-specific conditions. As part of a Tier 3 assessment, the responsible person must define the vertical and horizontal extent of soil contamination exceeding Tier 1 action levels and groundwater exceeding South Dakota groundwater quality standards in chapter 74:54:01.

Source: 22 SDR 86, effective December 18, 1995; transferred from § 74:03:33:13, July 1, 1996.

General Authority: SDCL 34A-2-93 , 34A-2-99 , 34A-2-101 , 34A-12-7.

Law Implemented: SDCL 34A-2-99 , 34A-2-101 , 34A-12-10.