Proposition 65: No Significant Risk Level for 1,3-Dichloropropene (1,3-D)
The Office of Environmental Health Hazard Assessment (OEHHA) has adopted an NSRL of 3.7 micrograms per day for exposures to 1,3-dichloropropene by the oral and inhalation routes (adopted in Title 27, Cal. Code of Regs., Section 25705(b)). NSRLs provide guidance for determining when a warning is required for exposures to chemicals listed as causing cancer. For more information on NSRLs, visit the OEHHA NSRLs page.
Final Approval/OAL Action
The Office of Administrative Law (OAL) approved the rulemaking and filed it with the Secretary of State on June 13, 2022. The effective date for the regulation is October 1, 2022.
Proposed Rulemaking
On October 29, 2021, OEHHA issued a Notice of Proposed Rulemaking, proposing to adopt NSRLs for 1,3-dichloropropene by amending Title 27, California Code of Regulations, section 25705(b)(1). The public comment period for this proposed rulemaking was open October 29 to December 13, 2021.
External Peer Review Comments by Dr Dana Loomis
External Peer Review Comments by Dr Mariana Stern
Data Call-in
On March 12, 2021, OEHHA issued a request for scientific information relevant to the development of the NSRL for 1,3-dichloropropene. The data call-in period ended on May 26, 2021.
Notice of Acceptance of Petition and Data Call-in
Notice of Extension of Data call-in
Link to Public Comments and Data Call-in Submissions
Petition for Rulemaking
In April 2019, OEHHA received a Petition requesting that OEHHA adopt an NSRL for 1,3-dichloropropene. On March 12, 2021, OEHHA granted the petition.
Link to Public Comments
- Comment Period - Notice to Interested Parties Acceptance of Petition for Rulemaking and Request For Information Safe Harbor Level For 1,3-Dichloropropene
- Comment Period - Notice of Proposed Rulemaking Amendment to Section 25705 Specific Regulatory Levels Posing No Significant Risk: 1,3-Dichloropropene