The New Jersey Department of Environmental Protection (NJDEP) recently released the following announcements regarding Vapor Intrusion (VI) updates and training. Our summary of these updates follow at the bottom.
Updated Vapor Intrusion Screening Levels & Revised Technical Guidance Now Available on SRP’s Website
The NJDEP’s Site Remediation Program (SRP) has modified the VI website to include updated and new information. This includes updated VI screening level (VISL) tables which are based on the latest United States Environmental Protection Agency (USEPA) Regional Screening Levels and now include Rapid Action Levels (RALs) for all volatile organic compounds, not just those most commonly found at contaminated sites.
A VI Screening Level Implementation Strategy is provided to explain how and when the new VISLs will be applied, as well as a flow chart for ease of understanding.
Also just released on the VI website is the revised VI Technical (VIT) Guidance document, which incorporates all of the revisions to the Technical Rules and addresses technical deficiencies noted in the January 2012 edition. Finally, the web page also features Johnson and Ettinger (J&E) Model spreadsheets that were updated to reflect toxicity changes in the new VISL.
Please refer to the VI web page for more information, or use these direct links:
NJDEP Hot Topics – Implementation of ‘New’ Vapor Intrusion Screening Levels & Release of Revised Vapor Intrusion Technical Guidance
One session will be held on:
- Wednesday, January 30th from 1:00 – 3:00 PM in the NJDEP Public Hearing Room, Trenton (registration begins at 12:30 PM)
- This course is being submitted to Site Remediation Professionals Licensing Board (SRPLB) for ‘Regulatory’ Continuing Education Credits.
This session will provide Licensed Site Remediation Professionals (LSRPs) and other interested parties with an overview of the:
- Basis for new VISLs
- New VISL Implementation Plan
- Update on Revised VIT Guidance (January 2013)
- Typical case scenarios
- Question and Answer
- John Boyer – NJDEP
- Diane Groth – NJDEP
- Andrew Sites – NJDEP
Once registered, you will receive an email confirming your registration with information you need to join the Webinar.
The slides and resulting audio will be posted on the SRP website shortly after the presentation for future reference.
Summary of VI Updates
The revised VISL will be implemented starting January 16, 2013. Highlights of these updates are as follows:
- The list of residential indoor air Rapid Action Levels (RALs) has been expanded and the and non-residential indoor air RALs have been added. Residential RALs will be applicable for sensitive receptors such as schools and daycares.
- VISLs for 1,3-dichlorobenzene, 1,2-dichloroethene (cis), 1,2-dichloroethene (total), 2-chlorotoluene, and tertiary butyl alcohol (TBA) have been eliminated.
- The non-residential indoor air VISL for tetrachloroethene (PCE), commonly associated with dry-cleaning operations, has increased significantly. Cases currently classified as an Immediate Environmental Condition (IEC) or Vapor Concern (VC) may no longer meet these criteria.
- VISLs for 1,1-dichloroethane, ethylbenzene, and 1,2,4-trichlorobenzene have decreased by over an order of magnitude. As a result of these changes, additional remediation may be required on some sites such as gas stations.
- VISLs for naphthalene and 2-methylnaphthalene have been added, and consistent with the May 2012 Technical Rules, the analysis of VI samples for these compounds will be required under specific circumstances after July 16, 2013. This six month period is allowing time for the laboratory community to obtain certification for these two compounds using USEPA Method TO-17.
As highlighted in the VISL Implementation Strategy Flow Chart, the following actions apply to all cases:
- All new cases initiated after January 16, 2013 shall follow the applicable Technical Rules and regulatory and mandatory timeframes using the new VISL.
- Unrestricted use final remediation documents for ground water issued prior to January 16, 2013 require no further investigation for the vapor intrusion (VI) pathway.
- Restricted use final remediation documents for groundwater issued prior to January 16, 2013 require an evaluation of the VI pathway as part of the biennial certification. Review existing data for order of magnitude changes using the new VISL. Based on this information, implement additional remediation as required.
- Remedial Action Workplans for groundwater issued prior to January 16, 2013 require a review of existing data for order of magnitude changes using the new VISL. Based on this information, implement additional remediation as required.
- Provided none of the abovementioned scenarios exist, the investigator shall employ up to 90 days to evaluate all existing site conditions and data using the new VISL. The 90-day review period terminates on April 16, 2013.
- Upon completion of the review (or April 16, 2013, whichever is sooner), follow the applicable Technical Rules and regulatory and mandatory timeframes using the new VISL.
Still confused? Contact Us with questions or assistance on your projects with VI issues.