A Tier 2 assessment is a risk-based analysis applying the direct exposure values established under a Tier 1 assessment at the point or points of exposure developed for a specific site and development of values for potential indirect exposure pathways at the point or points of exposure based on site-specific conditions. As part of a Tier 2 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.

Cross-References: Tier 1 action levels -- Criteria for calculation, § 74:56:05:07; Groundwater quality standards, ch 74:54:01.

Source: 22 SDR 86, effective December 18, 1995; transferred from § 74:03:33:10, 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.