Updated publications Guidance: Wisconsin Vapor Quick Look-Up Table Indoor Air Vapor Action Levels and Vapor Risk Screening Levels (RR-0136) and Guidance: History of Changes to Vapor Action Levels (VAL), Vapor Risk Screening Levels (VRSL) and Attenuation Factors (AF) for Common Volatile Organic Compounds (VOC) in Wisconsin (RR-0137) are now posted and available online.

Guidance: Wisconsin Vapor Quick Look-Up Table Indoor Air Vapor Action Levels and Vapor Risk Screening Levels (RR-0136)
RR-0136 lists volatile organic compounds frequently encountered at cleanup sites. The update includes vapor action and screening levels for cis-1,2-dichloroethylene (cis-1,2-DCE) based on updates to the U.S. Environmental Protection Agency (EPA) Regional Screening Levels.

Action and screening levels for cis-1,2-DCE should now be added to summary vapor data tables and exceedances noted. Consultants should compare vapor data for open sites to the updated table for potential additional actions. Vapor data for chemicals not available on RR-0136 should accessed via the U.S. EPA’s Vapor Intrusion Screening Level (VISL) Calculator; instructions on using VISL are included in RR-0136.

Guidance: History of Changes to Vapor Action Levels (VAL), Vapor Risk Screening Levels (VRSL) and Attenuation Factors (AF) for Common Volatile Organic Compounds (VOC) in Wisconsin (RR-0137)
RR-0137 is a quick reference to historical VAL, VRSL and AF values for VOCs, with dates when changes occurred. This document is intended to help users understand the basis for past decisions at sites.

Site-specific questions regarding vapor intrusion in Wisconsin should be directed to the assigned DNR project manager. General questions can be directed to the contacts are listed on the DNR Vapor Intrusion Resources for Environmental Professionals webpage.

Additional documents and guidance from the Remediation and Redevelopment Program may be found using the search tools available on the DNR publications and forms webpage.