Technical Guidance: Soil Vapour Intrusion Assessment

ERO number
011-2912
Notice type
Policy
Posted by
Ministry of the Environment, Conservation and Parks
Notice stage
Decision
Decision posted
Comment period
September 25, 2013 - November 24, 2013 (60 days) Closed
Last updated

This consultation was open from:
September 25, 2013
to November 24, 2013

Decision summary

We have completed our public consultation originally posted in 2013 and we used the comments we received to further revise the guidance document.

Given the length of time since the previous posting and updates made to the document, we are once again seeking comments (019-2557) to ensure that the updated guidance reflects the need of stakeholders

Decision details

Between September 15 to November 14, 2013, we sought public comments on the draft technical guidance on soil vapour intrusion assessment.

In general, various constructive comments were received, leading to further revision of this guidance document. A new proposal has been published for an additional period of public consultation (019-2557).

Comments received

Through the registry

5

By email

7

By mail

0
View comments submitted through the registry

Effects of consultation

During the 60 day consultation period, we received a total of 243 comments from 12 submissions. We reviewed and considered all comments received on this proposal in the development of the new proposal (019-2557). In general, a number of comments suggested the need to update the document to reflect the current state of the science (especially in relation to petroleum vapour intrusion) and to provide clearer guidance on the vapour intrusion assessment process. To address these comments, some key changes have been made to the document (019-2557), including:

  • revisions to reflect advances in the science of vapour intrusion and assessment techniques, which include additional guidance on biodegradation of petroleum hydrocarbons (PHCs) and screening approaches to evaluate the potential vapour intrusion risk associated with these chemicals.
  • clarifications and further guidance on the proposed assessment process, including the use of different lines of evidence to allow for flexibility in assessing the vapour intrusion pathway.
  • revisions to provide more concise and clearer recommendations on sampling design and assessment methods for addressing the vapour intrusion pathway.

Supporting materials

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Important notice: Due to the ongoing COVID-19 pandemic, viewing supporting materials in person is not available at this time.

Please reach out to the Contact listed in this notice to see if alternate arrangements can be made.

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Contact

Paul Welsh

Phone number
Email address
Office
Technical Assessment and Standards Development Branch
Address

40 St. Clair Avenue West
7th floor
Toronto, ON
M4V 1M2
Canada

Office phone number

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Original proposal

ERO number
011-2912
Notice type
Policy
Posted by
Ministry of the Environment, Conservation and Parks
Proposal posted

Comment period

September 25, 2013 - November 24, 2013 (60 days)

Proposal details

Description of policy

The Ministry of the Environment is posting a draft of the Technical Guidance: Soil Vapour Intrusion Assessment for comment. This guidance document considers soil vapour behavior, assessment and monitoring. It is intended to provide the user with a basic understanding of soil vapour intrusion and the tools required to identify and evaluate sites for vapour intrusion fate and transport associated with subsurface contamination.

The guidance document outlines a standard course of action when assessing soil vapour intrusion at any site in Ontario. These best practices are clear, concise and will result in increased integrity and quality of soil vapour assessment submissions; thereby resulting in improved environmental protection.

This guidance document reflects a three year development period, in which key experts and stakeholders contributed to the document. The process of developing this document was an iterative process in which the Ministry of the Environment sought comments and input from experts in the field of soil vapour intrusion. Before finalizing this Technical Guidance document, the ministry is once again seeking comments.

Purpose of policy

This document will support the ministry's mandate to protect the environment, by assisting proponents in the characterization and monitoring of volatile compounds present in the subsurface. It will also assist qualified professionals conducting risk assessments to identify sites, or contaminant levels for which contaminant exposures through vapour inhalation may cause adverse health effects.

Other information

The Technical Guidance: Soil Vapour Intrusion Assessment reflects the current state of knowledge on vapour intrusion given the developing field of science in this area. The principles identified within this guidance document are based on the best-available science and were developed in conjunction with technical experts currently conducting soil vapour intrusion assessments and monitoring.

Other public consultation opportunities

The draft Guidance was previously reviewed by a stakeholder advisory group comprised of Ministry of the Environment staff, consultants, developers, private laboratories and municipalities. A consultation meeting with this advisory group was held on February 12, 2009. Further consultation was conducted among a large group of brownfield stakeholders on January 27th, 2011. The comments received from these consultations were taken in consideration in the development of the current revised draft version of the guidance document. This draft of the guidance document is a result of the Ministry’s continuous engagement of stakeholders in the industry. Previous versions of the guidance document have been circulated to stakeholders for comment to ensure they reflect the needs of stakeholders.

Supporting materials

View materials in person

Important notice: Due to the ongoing COVID-19 pandemic, viewing supporting materials in person is not available at this time.

Please reach out to the Contact listed in this notice to see if alternate arrangements can be made.

Comment

Commenting is now closed.

This consultation was open from September 25, 2013
to November 24, 2013

Connect with us

Contact

Adam Leus

Phone number
Office
Environmental Sciences and Standards Division - Standards Development Branch
Address

40 St. Clair Avenue West
Floor 7
Toronto, ON
M4V 1M2
Canada

Office phone number