HAZWOPER Drum Handling & Sampling: Bulging Drums, Remote Opening, and Shock-Sensitive Waste

29 CFR 1910.120(j) · HAZWOPER Drum Handling

Keywords: HAZWOPER drum handling, bulging drum, remote drum opening, shock-sensitive waste, hazardous waste sampling, drum overpacking, headspace sampling

Bulging / Damaged Drum Protocol

• A bulging drum indicates internal pressure buildup — treat as potentially explosive or reactive.
• Do not attempt to move a severely bulged drum by hand without assessment.
• Establish exclusion zone; approach from upwind and uphill if movement is necessary.
• Use remote opening devices (pneumatic tools, remote bung openers) to relieve pressure from a safe distance.
• Never strike, drop, or use percussion on a drum of unknown contents.

Shock-Sensitive & Reactive Waste Red Flags

• Crystalline material around drum lids or bungs (may indicate shock-sensitive peroxides).
• Drums labeled or suspected to contain picric acid, organic peroxides, or azides.
• Any drum that has been heat-damaged, fire-scorched, or sat in the sun for extended periods.
• Unknown white/yellow crystalline residue — assume reactive until tested.
• Consult a chemist/industrial hygienist before sampling shock-sensitive drums.

Drum Sampling Sequence

1. Visual survey: Check for bulging, corrosion, leakage, labels, color coding, and physical condition before approaching.
2. Headspace sampling: Use a photoionization detector (PID) or flame ionization detector (FID) at the bung vent before opening.
3. Remote opening: Use an air-operated bung opener or similar remote tool; approach from upwind.
4. Liquid/solid sampling: Use Coliwasa (Composite Liquid Waste Sampler) for liquids; weighted bottle sampler or thief for solids and sludges.
5. Document and label: Photograph, assign sample ID, document field observations (color, odor, viscosity, approximate pH) on chain-of-custody form.

Exam Traps — Drum Handling

• Opening an unknown drum without headspace monitoring first is a major safety violation.
• Coliwasa is for liquids and slurries — it does not work properly on thick sludge or solids.
• An overpack drum must completely enclose the leaking drum; partial containment is not acceptable.
• Drums of unknown contents must be approached as if they contain the most hazardous material plausible given the site.
• Heat guns or flame-based devices must never be used around unknown or potentially flammable drums.

Drum Condition → Action Matrix