MCO 3440.8B — Installation Chemical, Biological, Radiological, Nuclear And High-yield...

MCO 3440.8B governs installation CBRNE preparedness standards, including planning, training, assessment, and capabilities.

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  • Publication number: MCO 3440.8B
  • Title: INSTALLATION CHEMICAL, BIOLOGICAL, RADIOLOGICAL, NUCLEAR AND HIGH-YIELD...
  • Date: 10 Apr 2026
  • Proponent: 03000 Operations & Readiness
  • Status: Current

View MCO 3440.8B on armypubs.army.mil


MCO 3440.8B establishes policy and procedures for installation CBRNE preparedness, response, mitigation, and recovery. It addresses program assessments, hazardous mail training, protection capabilities, corrective actions, and personnel categories.

Applies to: This Order applies to all Marine Corps installations and locations (including Service-Level Training Installation(s) (SLTI)), excluding government-owned facilities and facilities operated by contractors.

Topics covered

  • CBRNE preparedness standards
  • Program assessments
  • Hazardous mail training
  • CBRNE protection capabilities
  • Personnel categories
  • Installation CBRNE protection officer training
  • Corrective actions

Questions and answers

How often must Marine Corps installations conduct local risk assessments?

Local RAs shall be conducted by all regions and installations annually, or more frequently if threats or mission requirements dictate. (paragraph 4)

How often must post office personnel coordinate hazardous mail handler training?

Post office personnel will coordinate with local HAZMAT personnel, LE, and fire department officials, and medical personnel to ensure training of all mail handlers is accomplished annually. (paragraph 1)

What CBRNE capability must every installation have?

All installations shall have a CBRNE capability, whether organic or provided through agreements with external or internal partners; however, CBRNE capabilities on an installation will vary based on priority, objective level of response capability, and the hazards, threats, and vulnerabilities identified during RM assessments. (paragraph 2)

Which personnel categories receive priority protection resources?

Commanders will focus their resources on protecting Category 1 through 4 personnel and providing preparedness, response, mitigation, and recovery capabilities to Category 5 personnel. (paragraph 3)

What subjects must hazardous mail training cover?

Training at a minimum will be focused on the detection of mail bombs, isolation of packages, evacuation procedures, and identification of biologically or chemically hazardous mail. (paragraph 1)

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