Vapor intrusion

ITRC Vapor Intrusion Mitigation Training Series On Feb. 14 And Feb. 21

Posted on by Jodie Thistle

The Interstate Technology Regulatory Council (ITRC) will offer online vapor intrusion training over two sessions on Feb. 14 and Feb. 21, 2023.

The Vapor Intrusion Mitigation training series provides an overview of vapor intrusion mitigation and presents information on how to utilize the ITRC’s Vapor Intrusion Mitigation Interactive Directory. The interactive directory includes up-to-date fact sheets, technology information sheets and checklists. DNR staff participated in the development of both the technical resources and training.

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

Session 1 – Feb. 14, 2023, noon-2:00 p.m. CST
Topics Include:

  • Introduction and overview of vapor intrusion mitigation training team
  • Conceptual site models for vapor intrusion mitigation
  • Public outreach during vapor intrusion mitigation
  • Rapid response and ventilation for vapor intrusion mitigation
  • Remediation and institutional controls

Session 2 – Feb. 21, 2023, noon-2 p.m. CST
Topics Include:

  • Active mitigation approaches
  • Passive mitigation approaches
  • System verification, OM&M and exit strategies

Environmental professionals are encouraged to register at the CLU-IN Vapor Intrusion Mitigation webpage.

The online sessions will repeat in June 2023. This training is also available on-demand at the CLU-IN Vapor Intrusion Mitigation archive.

Now Available– Guidance: Wisconsin Vapor Quick Look-up Table (RR-0136) and Guidance: History of Changes to Vapor Action Levels, Vapor Risk Screening Levels and Attenuation Factors for Common Volatile Organic Compounds in Wisconsin (RR-0137)

Posted on by Jodie Thistle

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.

 

RR Program Seeks Vapor Intrusion Expert

Posted on by Jodie Thistle

The Remediation and Redevelopment (RR) Program is recruiting a Vapor Intrusion Expert.

This position will be stationed out of a DNR office within the state based on the applicant preference and space availability. The deadline to apply is Sept. 7, 2022.

This is a Project position that will be expected to end on July 31, 2026. Project positions are eligible for benefits including health insurance, but the incumbent does not attain civil service status.

The Vapor Intrusion Expert provides geologic and hydrogeologic expertise and oversight for inventory, assessment and remediation of dry cleaner and vapor contamination sites. The position focuses on vapor intrusion risk assessment and reduction of volatile compound contamination statewide. The Vapor Intrusion Expert serves as a RR Program technical resource for agency staff and external parties on assessment of vapor intrusion, evaluation of mitigation plans, approval, notification and tracking methods, and long-term stewardship for locations with mitigation systems installed or other protective measures in place.

A full position description, including necessary qualifications, is available online at the Wisc.jobs website (Job ID number 7424).

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

Posted on by Jodie Thistle

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

Posted on by Jodie Thistle

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

Posted on by Jodie Thistle

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

Posted on by Jodie Thistle

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

Posted on by Jodie Thistle

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

Posted on by Jodie Thistle

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

Posted on by Jessica

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.