DG Digest: USPS final rule revises ‘Pub 52,’ requiring mailers separate ‘hazmat’ into identifiable containers

June kicks off the summer vacation season for many people.  As HSE professionals it’s important for us to help our fellow employees deal with the “short staffing” that sometimes occurs as vacation times impact workplace operations. Let’s make sure that we remind our colleagues not to cut corners on safety and normal precautions to keep up with their work. A workplace injury due to short cutting a safety process will just make the situation worse, and could also result in a serious impact to the employee and their family members. Don’t let anyone ruin their summer that way! Safety, first and always. Here’s the week’s regulatory news:


In significant news, the Postal Service announced a direct final rule regarding separate tender of hazardous materials, and lithium battery changes.

USPS is revising Publication 52, Hazardous, Restricted, and Perishable Mail (Pub 52), to incorporate new requirements for mailers to separate, into identifiable containers, all hazardous material (HAZMAT) requiring hazardous marks or labels from other mail when tendering to the Postal Service. The Postal Service is also adopting related standard operating procedures for the Postal Service’s acceptance, dispatch, and mail processing personnel to maintain the integrity of HAZMAT separation.

Additionally, the Postal Service will now require pre-owned, damaged, or defective electronic devices containing or packed with lithium batteries to be mailed only via surface transportation and to bear specified markings. These changes are effective June 6, 2022. See full details here.


The agency announced that the National Advisory Committee on Occupational Safety and Health (NACOSH) will meet June 30, 2022.  The meeting will be virtual.  In conjunction with the committee meeting, the NACOSH Heat Injury and Illness Prevention Work Group will meet separately on June 30, 2022. NACOSH Work Group meeting: The NACOSH Heat Injury and Illness Prevention Work Group (Heat Work Group) will meet from 1:00 p.m. to 3:00 p.m., ET, Thursday, June 30, 2022. NACOSH meeting: NACOSH will meet from 3:30 p.m. to 5:30 p.m., ET, Thursday, June 30, 2022. See details on how to participate right here.

Transport Canada

A new edition of the following standard has been developed by the Canadian General Standards Board (CGSB) Technical Committee:

CAN/CGSB-43.123 “Aerosol Containers and Gas Cartridges for Transport of Dangerous Goods”.

Stakeholders must comply with the 2022 edition of CAN/CGSB 43.123, but in accordance with Section 1.3.2 of the Transportation of Dangerous Goods Regulations (TDGR), the previous version of the document (2017 edition) may be complied with during the transitional period of six (6) months ending on October 31, 2022.

Changes that appear in the new edition of this standard are summarized below:

  • Alignment with the 21st edition of the United Nations Recommendations on the Transport of Dangerous Goods – Model Regulations (Orange Book) and Title 49 of the Code of Federal Regulations of the United States (as amended from time to time);
  • Addition of specification requirements for the new TC-2P2 specification for gas cartridges intended to be used for liquified petroleum gases;
  • Addition of specification requirements for the new TC-2P1 and TC-2Q2 specifications intended to be used for foodstuffs and soaps;
  • Addition of reciprocity for DOT-2P1 and DOT-2Q2 specifications; and
  • Revision of requirements for the transport of aerosol containers and gas cartridges intended for disposal or recycling.

The standard may be obtained free of charge from:

Canadian General Standards Board (CGSB)
Sales Centre
Gatineau, Canada K1A 1G6

Telephone: 819-956-0425
Toll free: 1-800-665-2472
Fax: 819-956-5740

E-mail: ncr.ongc-cgsb@tpsgc-pwgsc.gc.ca
Website: Public Services and Procurement Canada

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