Vapor intrusion

Vapor Mitigation Update: DNR To Present At DHS Wisconsin Radon Conference Sept. 28, 2022

DNR staff will present at the Wisconsin Department of Health Services (DHS) Wisconsin Radon Conference in Marshfield on Sept. 28, 2022. The DNR’s presentation will include information on the health risks from chemical vapor intrusion, including the similarities and differences between chemical vapor intrusion and naturally occurring radon.

Conference attendees will have an opportunity to refresh their knowledge base on indoor air quality and radon, gain understanding of current and emerging issues and network to improve statewide collaboration. This conference is intended for soil gas mitigators, state and local health departments, contractors, nonprofits and home inspectors.

Environmental consultants who hire soil gas mitigators for environmental cases are encouraged to share this continuing education opportunity with their contractors. There is overlap in both health risks and solutions to mitigate exposure from chemical vapor intrusion and naturally occurring radon.

The DNR values partnering with the DHS and local health departments regarding risks to human health from environmental contamination.

More information on the one-day conference and a pre-conference training opportunity is available here.

Now Available: Publication RR-0136, Guidance: Wisconsin Vapor Quick Look-Up Table

Updated publication RR-0136, Guidance: Wisconsin Vapor Quick Look-Up Table, is now posted and available online.

The document can be found on the Vapor Intrusion for Environmental Professionals webpage. Additional documents and guidance from the Remediation and Redevelopment Program may be found using the search tools available on the publications and forms webpage.

The document lists select volatile organic compounds frequently encountered at remediation sites; it is updated periodically based on updates to inhalation toxicity data. Consultants should compare vapor data for open sites to the updated table for potential additional actions and should routinely reference the webpage for the most recent version.

The basis for the U.S. EPA Regional Screening Levels were updated in May 2022; the update does not include revisions to action or screening levels.

Consultants should compare vapor data for chemicals not available on Wisconsin’s Vapor Quick Look-Up Table directly to the U.S. EPA’s Vapor Intrusion Screening Level Calculator; instructions are included on Wisconsin’s Vapor Quick Look-Up Table.

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 listed on the DNR’s Vapor Intrusion Resources for Environmental Professionals webpage.

Request for Statements of Qualifications

The Wisconsin Department of Natural Resources (DNR) is accepting Statements of Qualifications (SOQs) to provide professional services to the DNR for the following Requests for Qualifications (RFQs):

  • Federal Brownfields Assessment at Vapor Intrusion Priority Properties
  • Federal Brownfields Assessment at Wisconsin Assessment Monies (WAM) Properties
  • State Vapor Intrusion Zone Contract for Vapor Investigation and Mitigation Services

Interested consultants may choose to submit an SOQ to any or all of the RFQs.

Copies of the RFQs are available on the RR Program Public Notices webpage.

DHS Publishes “TCE in the Workplace” Fact Sheet

When environmental contamination presents potential human health risks, the Wisconsin Department of Natural resources (DNR) works closely with the Wisconsin Department of Health Services (DHS) and local health departments.

In February 2022, DHS published TCE in the Workplace, a fact sheet on health concerns associated with trichloroethylene (TCE) in various work environments. TCE in the Workplace helps workers understand the health risks where TCE is being used in a facility and may be helpful during vapor intrusion investigations. It is available in English, Spanish and Hmong.

The fact sheet includes suggestions to keep workers safe, as well as workplace guidelines for exposure limits by the National Institute for Occupational Safety and Health (NIOSH), the Occupational Safety and Health Association (OSHA), the American Conference of Governmental Industrial Hygienists (ACGIH) and the DNR.

The DHS fact sheet TCE in the Air is also available to assist with communicating the health risks of TCE in situations when contamination has the potential to cause vapor intrusion in nearby structures (e.g., residences, day cares). Since publication, the DNR, DHS and environmental consultants have been providing TCE in the Air to off-site property owners to educate them about the health risks associated with TCE while working to gain access, perform vapor intrusion investigations and install mitigation systems. TCE in the Air is available in English and Spanish.

Links to the fact sheets are available under the “Health” tabs on the DNR’s Vapor Intrusion Resources for Environmental Professionals and Vapor Intrusion webpages.

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 listed on the DNR’s Vapor Intrusion Resources for Environmental Professionals webpage.

Interstate Technology Regulatory Council Comprehensive Vapor Intrusion Mitigation Training June 2 and 14

The Interstate Technology Regulatory Council (ITRC) will offer online, comprehensive vapor intrusion training based on recent, technical guidance from the national group.

The upcoming live webinars will cover the purpose and use of the Dec. 2020 comprehensive web-based series of technical resources for Vapor Intrusion Mitigation.

Staff from the DNR’s Remediation and Redevelopment Program participated in the development of both the technical resources and training.

The training consists of a series of eight modules on the sections listed below and will be presented over two, two-hour sessions:

  • Thursday, June 2, 2022 (noon to 2 p.m. CST)
  • Tuesday, June 14, 2022 (noon to 2 p.m. CST)

Environmental professionals are encouraged to register and participate.

A link to the ITRC’s web-based document is posted on the DNR’s Vapor Intrusion Resources for Environmental Professionals website under the “Guidance and Forms” tab. This document includes an interactive directory that includes 10 fact sheets, 16 technology information sheets, and four checklists, covering the following topics specific to vapor intrusion mitigation:

  • Conceptual site model
  • Public outreach
  • Rapid response and ventilation (for acute risk)
  • Active mitigation
  • Passive mitigation
  • Remediation and institutional controls
  • Design considerations
  • Post installation considerations
  • Operation, maintenance and monitoring/exit strategy
  • Emerging technology

While the documents are designed to assist state regulators, they also serve to raise awareness with environmental consultants and other industry professionals.

The online sessions will be repeated on Nov. 3 and 15, 2022. If watching the training through on-demand video playback is preferred, you can find the same vapor intrusion trainings here.

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 listed on the DNR’s Vapor Intrusion Resources for Environmental Professionals website.

Wisconsin Vapor Quick Look-Up Table Updated

Updated publication RR-0136, Guidance: Wisconsin Vapor Quick Look-Up Table is now posted and available online.

The document can be found on the Vapor Intrusion for Environmental Professionals webpage. Additional documents and guidance from the Remediation and Redevelopment Program may be found using the search tools available on the publications and forms webpage.

The document lists select volatile organic compounds frequently encountered at remediation sites; it is updated periodically based on updates to inhalation toxicity data, generally semi-annually when the U.S. EPA updates its table (last updated in November 2021). Consultants should compare vapor data for open sites to the updated table for potential additional actions and should routinely reference the webpage for the most recent version.

The February 2022 version includes the removal of infrequently used chemicals:

  •  Methyl tert-Butyl Ether (MTBE),
  • 1,2,4-Trimethylbenzene (TMB),
  • 1,3,5-TMB, and
  • Xylene (m, o and p separately)

Consultants should compare vapor data for chemicals not available on Wisconsin’s Vapor Quick Look-Up Table directly to the U.S. EPA’s Vapor Intrusion Screening Level Calculator; instructions are included on Wisconsin’s Vapor Quick Look-Up Table.

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 listed on the DNR’s Vapor Intrusion Resources for Environmental Professionals webpage.

 

ITRC Vapor Intrusion Mitigation Training Jan. 13 & 27

The Interstate Technology Regulatory Council (ITRC) will offer online, comprehensive vapor intrusion training based on recent, technical guidance from the national group.

The upcoming live webinars will cover the purpose and use of ITRC’s comprehensive web-based series of technical resources for Vapor Intrusion Mitigation.

The training consists of a series of eight modules on the sections listed below and will be presented over two, two-hour sessions:

  • Jan. 13, 2022 (noon to 2 p.m. CST)
  • Jan. 27, 2022 (noon to 2 p.m. CST)

Registration is available on the ITRC’s training and events webpage.

A link to the ITRC’s Technical Resources for Vapor Intrusion Mitigation is also posted on the DNR’s Vapor Intrusion Resources for Environmental Professionals webpage under the “Guidance and Forms” tab near the bottom of the page. This comprehensive document includes an interactive directory that includes 10 fact sheets, 16 technology information sheets, and four checklists, covering the following topics specific to vapor intrusion mitigation:

  • Conceptual site model
  • Public outreach
  • Rapid response and ventilation (for acute risk)
  • Active mitigation
  • Passive mitigation
  • Remediation and institutional controls
  • Design considerations
  • Post installation considerations
  • Operation, maintenance and monitoring/exit strategy
  • Emerging technology

While the documents are designed to assist state regulators, they also serve to raise awareness with environmental consultants and other industry professionals.

The online sessions will be repeated on June 2 and June 14, 2022, and again on Nov. 3 and Nov. 15, 2022. The vapor intrusion trainings are also available on-demand.

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 listed on the DNR’s Vapor Intrusion Resources for Environmental Professionals webpage.

DNR’s RR Program Seeks Vapor Intrusion Expert In Southeast Region

The Wisconsin Department of Natural Resources (DNR)’s Remediation and Redevelopment (RR) Program is recruiting a Vapor Intrusion Specialist in the DNR’s Southeast Region.

This position will serve as the RR Program’s regional coordinator for assessment of vapor intrusion of volatile compounds, mitigation and development of statewide policy related to vapor intrusion. This person will develop and interpret administrative rules, guidance documents and technical documents related to the assessment, mitigation and remediation of vapor phase contamination.

This position reports to the Complex Projects and Technical Resources Section Chief and will be located in the DNR’s Milwaukee office. The deadline to apply for this position is Jan. 2, 2022.

A full position description, including necessary qualifications, is available online at the Wisc.jobs website (Job ID number 3921).

New Community Resource For Vapor Intrusion Evaluation

The Wisconsin Department of Natural Resources (DNR) is now offering an online resource tool for local governments, neighborhood associations and property owners to evaluate sources and minimize the risks of vapor intrusion from historical dry-cleaning operations in their communities.

For much of the 1900s, dry cleaning was a common business especially in Iarge cities where the service could be found on almost every commercial block. The disposal or spilling of cleaning solvents used by historical dry cleaners, long before current waste management laws were in effect, may have resulted in chemical vapors in the ground that can migrate into present-day buildings.

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Reminder: Issues & Trends Webinar Next Week: Vapor Intrusion – Revised Guidance, Recent Training and Rule Reminders

The Remediation and Redevelopment (RR) Program reminds you that the next webinar in the Issues & Trends series will take place next week, on November 16, 2021, from 12:00 p.m. to 1:00 p.m.

The scheduled presentation is: Vapor Intrusion – Revised Guidance, Recent Training and Rule Reminders.

Continue reading “Reminder: Issues & Trends Webinar Next Week: Vapor Intrusion – Revised Guidance, Recent Training and Rule Reminders”