Wisconsin Administrative Code › Department of Natural Resources › NR 700-799 - Environmental Protection - Investigation and Remediation of Environmental Contamination › Chapter NR 722 - Standards for selecting remedial actions › Section NR 722.07 - Identification and evaluation of remedial action options

Current through June 24, 2024
(1) GENERAL. Unless
				otherwise directed by the department, responsible parties shall identify and
				evaluate an appropriate range of remedial action options in accordance with the
				requirements of this section.
(2)IDENTIFICATION OF LIKELY REMEDIAL ACTION
				OPTIONS. An initial screening of remedial technologies shall be conducted to
				identify remedial action options for further evaluation which are reasonably
				likely to be feasible for a site or facility, based on the hazardous substances
				present, media contaminated and site characteristics, and to comply with the
				requirements of s.
				NR
				722.09.
(3)EVALUATION OF REMEDIAL ACTION OPTIONS.
(a) Except as provided in par. (b),
				responsible parties shall use all of the criteria in sub. (4) to further
				evaluate appropriate remedial action options that have been identified for
				further evaluation under sub. (2), for each contaminated medium or migration or
				exposure pathway. This evaluation process shall be used to determine which
				remedial action option constitutes the most appropriate technology or
				combination of technologies to restore the environment, to the extent
				practicable, within a reasonable period of time and to minimize the harmful
				effects of the contamination to the air, land, or waters of the state, to
				address the exposure pathways of concern, and effectively and efficiently
				address the source of the contamination.
Note:
The purpose of the technical and economic
				  feasibility evaluation is to evaluate a range of remedial action options
				  suitable for a particular site or facility to determine the practicability of
				  implementing those options. If a particular option is not suitable for a
				  particular site or facility, such as in situ air sparging in dense clay soils,
				  it should not be evaluated. Emphasis should be placed on remedial action
				  options suitable for a particular site or facility. Any remedy selected should
				  attempt to limit secondary impacts including air and water discharges,
				  destruction of ecosystems, and excessive use of energy.
Note:
For cases involving a discharge and
				  migration of organic contaminants that do not readily degrade in soil or
				  groundwater, an active remedial action that will reduce the contaminant mass
				  and concentration will typically be necessary. Natural attenuation, covers, and
				  barriers do not actively reduce contaminant mass and concentrations.
				  Chlorinated compounds are the most common contaminants that fall under this
				  provision. Some organic contaminants, such as PCBs and PAHs may not readily
				  migrate, depending on site characteristics.
(am) Responsible parties shall document their
				evaluation of a remedial option or combination of options which would use
				recycling or treatment technologies that destroy or detoxify contaminants,
				rather than transfer the contaminants to other media.
(b) A detailed evaluation based on the
				criteria in sub. (4) is not required in those cases where a remedial action
				option identified during the initial screening results in the reuse, recycling,
				destruction, detoxification, treatment, or any combination thereof of the
				hazardous substances present at the site and this proposed option meets all of
				the following requirements:
1m. Is proven to
				be effective in remediating the types of hazardous substances present at the
				site, based on experience gained at other sites with similar site
				characteristics and conditions;
2m.
				Can be implemented in a manner that will not pose a significant risk of harm to
				human health, safety, or welfare or the environment; and
3. Is likely to result in the reduction or
				control, or both, of the hazardous substances present at the site to a degree
				and in a manner that is in compliance with the requirements of s.
				NR 722.09(2) to
				(4).
Note:
Section NR 722.07(3) (b) is intended to
				  provide a streamlined evaluation process for certain remedial actions that are
				  presumed to meet the evaluation and selection criteria in ss. NR 722.07 and
				  722.09.