Proposed Re-evaluation Decision PRVD2017-01, Chloropicrin

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Pest Management Regulatory Agency
30 May 2017
ISSN: 1925-0967 (PDF version)
Catalogue number: H113-27/2017-1E-PDF (PDF version)

This page is a summary of the consultation document. If you would like to comment, please request the full consultation document.

To obtain a full copy of Proposed Re-evaluation Decision PRVD2017-01, Chloropicrin please contact our publications office.

Should you require further information please contact the Pest Management Information Service.

Summary

Table of Contents

What Is the Proposed Re-evaluation Decision?

After a re-evaluation of chloropicrin, Health Canada’s Pest Management Regulatory Agency (PMRA), under the authority of the Pest Control Products Act and Regulations, is proposing continued registration of products containing chloropicrin for sale and use in Canada.

An evaluation of available scientific information found that products containing chloropicrin do not present unacceptable risks to human health or the environment when used according to label directions. As a result of the re-evaluation, the PMRA is proposing label amendments to meet the current labelling standards. No additional risk reduction measures are proposed.

This Proposed Re-evaluation Decision PRVD2017-01, Chloropicrin follows risk reduction measures implemented in 2012 for chloropicrin to limit user exposure and to further protect the environment (Re-evaluation Notes REV2012-07, Chloropicrin, Dazomet, Metam Sodium and Metam Potassium Label Improvements for Antimicrobial Products, REV2012-08, Chloropicrin, Dazomet, Metam Sodium and Metam Potassium Label Improvements for Soil Fumigant Products and REV2012-09, Label Amendments for Soil Fumigant Products Containing Chloropicrin). The measures which were implemented in 2012 and came into force in 2014 were consistent with measures adopted by the United States Environmental Protection Agency (USEPA).

Proposed Re-evaluation Decision PRVD2017-01, Chloropicrin is a consultation document that summarizes the science evaluation for chloropicrin and presents the reasons for the proposed re-evaluation decision. PRVD2017-01, Chloropicrin is presented in two parts. The Overview describes the regulatory process and key points of the evaluation, while the Science Evaluation provides detailed technical information on the assessment of chloropicrin.
This proposed decision affects all end-use products containing chloropicrin registered in Canada.

The PMRA will accept written comments on Proposed Re-evaluation Decision PRVD2017-01, Chloropicrin up to 90 days from the date of publication of PRVD2017-01. Please forward all comments to Publications.

What Does Health Canada Consider When Making a Re-evaluation Decision?

The PMRA’s pesticide re-evaluation program considers potential risks, as well as value, of pesticide products to ensure they meet modern standards established to protect human health and the environment.

Chloropicrin has been re-evaluated under Re-evaluation Program 1 as per Regulatory Directive DIR2001-03, Pest Management Regulatory Agency Re-evaluation Program. This program relies as much as possible on foreign reviews, typically USEPA Reregistration Eligibility Decision (RED) documents. As such, the re-evaluation was based primarily on the USEPA RED (2008), the amended RED (2009), and the revised Human Health Risk Assessment for Chloropicrin (2011).

In this proposed decision (PRVD2017-01), the PMRA takes into account the Canadian use pattern and issues (for example, the federal Toxic Substances Management Policy). The PMRA compared the American and Canadian use patterns and found the USEPA assessments described in the RED documents were relevant to the Canadian situation. Additional risk assessments were conducted by the PMRA where deemed necessary.

The PMRA is aware that the USEPA opened their Registration Review docket for chloropicrin in 2013, and that the USEPA assessment of chloropicrin is ongoing.

What Is Chloropicrin?

In Canada, chloropicrin is a non-selective pre-plant soil fumigant used to control pathogens including insects, nematodes, bacteria, fungi and weeds in soil. In addition, chloropicrin is used as a remedial wood preservative to treat structural timber (such as poles).

Health Considerations

Can Approved Uses of Chloropicrin Affect Human Health?

Products containing chloropicrin are unlikely to affect human health when used according to label directions.

Potential exposure to chloropicrin may occur through diet (food and water), through bystander exposure, while working as a mixer/loader/applicator or by entering treated sites.
Extensive risk reduction measures have been implemented in Canada in 2012 to minimize exposure to workers and bystanders. These measures are expected to mitigate risks of concern for workers and bystanders. Risk from dietary exposure to chloropicrin is not of concern under current conditions of use.

Currently registered labels include the risk reduction measures required to minimize potential exposure to humans. No further risk reduction measures beyond those currently on the product labels are proposed.

Environmental Considerations

What Happens When Chloropicrin Is Introduced into the Environment?

When used according to label directions, chloropicrin is not expected to pose risks of concern to the environment.

Chloropicrin enters the environment when applied as a soil fumigant and for remedial wood treatment. When applied as a fumigant, chloropicrin is injected into the soil and the soil is sealed to prevent its release. When applied for wood treatment, the environmental releases are expected to be minimal.

Once in the environment, chloropicrin will evaporate into the air and is easily broken down. Although chloropicrin has a potential to move through soil, available monitoring information shows that the levels in groundwater are minimal. Chloropicrin will not accumulate in the tissues of animals.

Chloropicrin does not present a risk of concern to wild mammals, birds, bees, invertebrates, freshwater or marine invertebrates, fish and amphibians. Currently registered labels include the risk reduction measures required to minimize potential exposure to non-target organisms and to protect aquatic environments from the potential effects from run-off. No further risk reduction measures beyond those currently on the product labels are proposed. Minor label amendments are proposed to meet current labelling standards.

Proposed Measures to Minimize Risk

Labels of registered pesticide products include specific instructions for use. Directions include risk-reduction measures to protect human health and the environment. As a result of the re-evaluation of chloropicrin, the PMRA is proposing label amendments to meet current labelling standards (See Appendix III). No additional risk reduction measure is proposed.

What Additional Scientific Information Is Required?

There is no additional data requirement proposed under section 12 of the Pest Control Products Act.

Next Steps

Before making a final re-evaluation decision on chloropicrin, the PMRA will consider any comments received from the public in response to PRVD2017-01, Chloropicrin. The PMRA will then publish a Re-evaluation Decision that will include the decision, the reasons for it, a summary of comments received on the proposed decision and the PMRA’s response to these comments.

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