DPR 24-001 – Health Risk Mitigation for 1,3-Dichloropropene

DPR 24-001 Health Risk Mitigation for 1,3-Dichloropropene (Notice 11/15/24; Comment period closed 1/24/25; “15-day” comment period 6/5/25-6/20/25)

DPR proposes to adopt Title 3, California Code of Regulations (3 CCR) section 6448.5 and amend sections 6000, 6448, 6448.2, 6448.4, 6624, and 6626. In summary, the proposed action restricts the use of 1,3-dichloropropene (1,3-D) to mitigate the potential 40-year working lifetime cancer risk to occupational bystanders. The proposed action establishes buffer zone distances (distances from the edge of a treated area where certain activities are restricted) and requires DPR to include an evaluation in the 1,3-D Annual Report of whether the 1,3-D air concentration in any township exceeds the acceptable level of 0.21 part per billion and to develop appropriate measures to reduce exposures if target air concentration levels are exceeded. DPR also proposes to repeal the document “1,3-Dichloropropene Field Fumigation Requirements, Est January 1, 2024,” and adopt the document “1,3-Dichloropropene Field Fumigation Requirements, Rev. January 1, 2026,” which is incorporated by reference in existing sections 6448, 6448.2, 6624, and 6626. A copy of this document is posted below.

The three in-person public hearings were held on January 8, 16, and 21, and one virtual public hearing was held on January 10 to receive oral and/or written comments regarding the proposed action.

On June 5, 2025, DPR issued a Notice of Modifications to Text of Proposed Action and Notice of Addition of Documents to the Rulemaking File. DPR will accept written comments relevant to the modifications and additional documents between June 5, 2025, and June 20, 2025.

Date Noticed: 11/15/2024
Status: Proposed
Section 100: No
Adopted: No
Status & Notes:
Hearings:
01/08/2025
01/10/2025
01/16/2025
01/21/2025
Comment Period:
  • 11/15/2024 - 01/24/2025
  • “15-day” comment period: 06/05/2025 - 06/20/2025

Attachments

Hearings

01/16/2025 - 1,3-D Regulatory Hearing
January 16, 2025
6:00 pm - 8:00 pm
01/10/2025 - 1,3-D Regulatory Hearing
January 10, 2025
10:00 am - 12:00 pm
01/08/2025 - 1,3-D Regulatory Hearing
January 8, 2025
6:00 pm - 8:00 pm
01/21/2025 - 1,3-D Regulatory Hearing
January 21, 2025
6:00 pm - 8:00 pm