Residual contamination

Reminder: Issues & Trends Webinar on June 15, 2021: 1,4-Dioxane – A Contaminant of Emerging Concern

The Remediation and Redevelopment (RR) Program reminds you that the next webinar in the Issues & Trends series will take place on Tuesday, June 15, 2021, from 12:00 p.m. to 1:00 p.m.

The scheduled presentation is: 1,4-Dioxane – A Contaminant of Emerging Concern.

This presentation will provide an overview of 1,4-dioxane. RR Program engineer Angela Carey will review considerations for site investigation scoping, sampling and analysis and selection of remedial options. In addition, information regarding proposed updates to 1,4-dioxane groundwater quality standards in NR 140 will be provided.

A Zoom web conferencing registration link, along with a schedule of future Issues & Trends presentations, may be found on the RR Program’s Conferences and Training webpage.

Recordings of previous Issues & Trends webinars can be found in the RR Program’s Training Library.


Public Input Opportunity Ends Soon for Publication RR-606, Guidance on the Case Closure Process and Continuing Obligations: Wis. Admin. Code chs. NR 725 to727

The public comment period ends next week (March 24, 2021) for publication RR-606, Guidance on the Case Closure Process and Continuing Obligations: Wis. Admin. Code chs. NR 725 to 727.

The document can be found at the RR Program’s Public Notices & Guidance web page under the “Program Guidance” tab. Comments may be submitted through March 24, 2021 to Jane Lemcke at or

The purpose of the guidance is to guide users in preparing for a case closure request, particularly at sites where contamination remains after response actions are complete and continuing obligations are needed to address exposure pathways. This guidance document is intended for use by responsible parties, consultants or other interested parties, the Wisconsin Department of Natural Resources staff and Wisconsin Department of Agriculture, Trade and Consumer Protection staff.

New Fillable PDF Form for Materials Management Plan

A new, fillable PDF form has replaced RR-072. The new form is 4400-315: Recommended Template for Request to Manage Materials under Wis. Admin. Code § NR 718.12 or NR 718.15

The purpose of this form is to provide an optional template format for consultants and responsible parties to demonstrate the proposed management of solid waste material qualifies for a Wis. Admin. Code § NR 718.12 or NR 718.15 exemption and to request written approval of the request.

Continue reading “New Fillable PDF Form for Materials Management Plan”

Soil RCL Calculator Updates – June 2018

The Wisconsin DNR’s Remediation and Redevelopment Program recently updated the numerical soil standards in its spreadsheet of residual contaminant levels (RCLs). The RCLs were determined using the U.S. EPA regional screening level web-calculator.

A summary of the changes to the RCLs is in a new document, titled “RR Program’s Soil RCL Spreadsheet Update,” publication number RR-052g.

For more information and to access the RCL spreadsheet (macro and non-macro versions), visit the Wisconsin DNR’s Resources for Environmental Professionals web page and click on the “Soil RCLs” tab.