74:56:05:13Tier 3 assessments.
Section · Administrative Rules of South Dakota · View on sdlegislature.gov ↗
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.