11 Miss. Code. R. 3-2.2.1 - General
A. Introduction
(1) The Mississippi Brownfields Voluntary
Cleanup and Redevelopment Program (Brownfields Program) utilizes risk-based
criteria for Site evaluation and remediation. The risk-based procedures and
rationale for evaluating environmental contamination on or under a Site are
presented in this Subchapter II. This evaluation is necessary to develop
remediation requirements that are protective of human health and the
environment. All remediation and/or corrective actions must be approved by
MDEQ.
(2) In considering the
risk-based evaluation of conditions on or under a Site, the following must be
addressed:
(a) complete the Site Conceptual
Exposure Model (SCEM) to evaluate site-specific risk and exposure conditions
before and after remediation;
(b)
conduct a Site Characterization to delineate the nature and extent (vertically
and horizontally) of contamination found on or under the Site;
(c) complete the Site Ecological Checklist to
determine whether an ecological risk assessment is necessary; and
(d) conduct a Risk-Based Evaluation of the
Site utilizing the Brownfields Program three-tiered approach.
(3) The cornerstone of the
Brownfields Program is a three-tiered risk-based process for evaluating human
health and environmental risks. These tiers are referred to as Tier 1, Tier 2,
and Tier 3. These tiers are designed to allow the Applicant to evaluate and
determine appropriate remedial options for site specific conditions. A
description of each tier is discussed below.
(a) A Tier 1 Evaluation is the comparison of
site-specific data to a "look-up" table of chemical-specific target remediation
goals (TRGs). Specific TRG concentrations have been determined to be protective
of human health and the environment for restricted use and unrestricted use of
a Site. The Tier 1 TRG Table is presented in Appendix A.
(b) A Tier 2 Evaluation provides the
Applicant the option of performing a more in-depth evaluation of site-specific
conditions to develop site-specific Remediation Goals (RG) and/or to better
define site-specific data to be used for a Tier 1 Evaluation.
(c) A Tier 3 Evaluation is a site-specific
risk assessment to evaluate the potential human health and ecological risks at
the Site that will result in the development of site-specific Remediation Goals
(RGs).
(4) Land use plays
an integral role in the three-tiered approach and in the development of the
SCEM. Land-use restrictions may reduce or eliminate the potential for exposure
to contaminants and risk.
(5)
Specific criteria for evaluating Sites impacted with petroleum hydrocarbons is
contained in Rule
2.2.7 of this
Subchapter.
Notes
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