Health-based Recommendations to Address Potential Cancer Risks to Occupational Bystanders from the use of 1,3-D

Nov 14, 2024

Under the authority of California Food and Agricultural Code Section 12980 and 12981, OEHHA has prepared health-based recommendations for the Department of Pesticide Regulation (DPR) to address potential cancer risks to occupational bystanders from the use of the fumigant 1,3-dichloropropene (1,3-D). OEHHA has submitted a memo as well as an attachment that includes the preliminary analyses and further assumptions underlying the risk calculations. OEHHA also submitted a supplemental document that supports the memorandum. OEHHA requested external scientific peer review of the scientific basis of the memo and its associated documents, per the requirements of California Health and Safety Code section 57004.

On November 14, 2024, the California Department Pesticide Regulation (DPR) has proposed new regulations, developed jointly and mutually with the Office of Environmental Health Hazard Assessment (OEHHA), to mitigate the cancer risk from 1,3-Dichloropropene (1,3-D) to occupational bystanders. Public comments can be submitted to DPR until January 24, 2025. Public hearings on the proposed regulations will be held in various locations early next year. The proposed regulations, and more information about public comments and hearings, can be viewed on DPR’s webpage. A joint press release is available on both DPR and OEHHA’s websites.

For more information on the proposed amendment pertaining to the restricted use of 1,3-Dichloropropene (1,3-D) to mitigate the potential 40-year working lifetime cancer risk to occupational bystanders go to DPR’s webpage on 1,3-D.