2023 Indiana Code › Title 13. Environment › Article 25. Hazardous Substances › Chapter 5. Voluntary Remediation of Hazardous Substances and Petroleum › 13-25-5-8.5. Voluntary Remediation Work Plan Objectives; Additional Action to Protect Human Health and the Environment Not Necessary Under Certain Circumstances; Risk Based Remediation Objectives and Proposals

Sec. 8.5. (a) A voluntary remediation work plan must specify the remediation objectives for the site. Subsections (b) through (e) apply to a site regardless of whether the site was entered into the voluntary remediation program before July 1, 2009, or after June 30, 2009.
(b) The remediation objectives for each hazardous substance and any petroleum on the site shall be based on:
(1) background levels of hazardous substances and petroleum that occur naturally on the site; or
(2) an assessment of the risks pursuant to subsection (d) posed by the hazardous substance or petroleum presently found on the site taking into consideration the following:
(A) Expected future use of the site.
(B) Measurable risks to human health, natural resources, or the environment based on the:
(i) activities that take place; and
(ii) environmental impact;
on the site.
(c) If the:
(1) nature and extent of the hazardous substance or petroleum is adequately characterized under the voluntary remediation work plan, considering the remediation objectives developed under this section; and
(2) the level of the hazardous substance or petroleum is demonstrated to be below:
(A) background levels of the hazardous substances and petroleum that occur naturally on the site; or
(B) the risk based levels developed under subsection (d);
additional action is not necessary to protect human health or the environment.
(d) Risk based remediation objectives shall be based on one (1) of the following:
(1) Levels of hazardous substances and petroleum calculated by the department using standard equations and default values for particular hazardous substances or petroleum.
(2) Levels of hazardous substances and petroleum calculated using site specific data for the default values in the department's standard equations.
(3) Levels of hazardous substances and petroleum developed based on site specific risk assessments that take into account site specific factors, including remedial measures, restrictive covenants, and environmental restrictive ordinances that:
(A) manage risk; and
(B) control completed or potential exposure pathways.
(e) The department shall consider and give effect to restrictive covenants and environmental restrictive ordinances in evaluating risk based remediation proposals.
(f) The department, or a person authorized under subsection (g), shall give written notice to a municipal corporation that the department is relying on an environmental restrictive ordinance adopted by the municipal corporation as part of a risk based remediation proposal:
(1) approved by the department; and
(2) conducted under IC 13-22, IC 13-23, IC 13-24, IC 13-25-4, or IC 13-25-5.
(g) The department may delegate authority to give the written notice referred to in subsection (f) to the person who proposed the risk based remediation.
As added by P.L.59-1997, SEC.20. Amended by P.L.78-2009, SEC.18; P.L.159-2011, SEC.40.