Michigan In Situ Remediation Guidance Document - 2016

Hydrogeology, Geology, & Environmental Issues

Date posted: 05/04/16

The purpose of this document is to provide general direction and requirements for the selection, design, implementation, and evaluation of in situ remedial technologies and discharges. This document provides information that is necessary to support the selection of an in situ remedy. It is intended to foster the development of viable strategies that are consistent with the applicable requirements of ... Part 201, Environmental Remediation (Part 201), of the Natural Resources and Environmental Protection Act (NREPA), 1994 PA 451, as amended, Administrative Rules, Part 213, Leaking Underground Storage Tanks (Part 213), of the NREPA, and the Part 22 Groundwater Administrative Rules (Part 22 Rules) promulgated pursuant to Part 31, Water Resources Protection (Part 31) of the NREPA. This document also describes the applicability of the Part 22 Rules to in situ remedial discharges and general requirements for obtaining a permit exemption. The direct or indirect introduction of any substances into groundwater that meets the definition of a discharge is subject to the standards of the Part 22 Rules. As such, the standards of the Part 22 Rules apply to all in situ remedial discharges. This document provides acceptable approaches and ranges of appropriate assumptions that are intended to support consistent exercise of professional judgment in a manner that produces satisfactory outcomes. Alternative approaches may be used if the person proposing the alternative demonstrates that the approach meets all the requirements of the statute and rules. With the variety of established and developing in situ remedial technologies and a myriad of facility-specific applications, each with its own unique combination of circumstances and nuances, it is impossible to cover every scenario. However, commonly encountered scenarios are provided as examples to illustrate conceptual approaches where appropriate. Nevertheless, this document is not intended to be comprehensive.