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Mercury-Containing Device Handling - CFL, Thermostat, Switch

SOP Compliance Updated Jun 19, 2026 ยท Junk Removal

Why this matters

Mercury is regulated under RCRA as a hazardous waste, but most mercury-containing devices a junk-removal operator encounters fall under the Universal Waste rule at 40 CFR Part 273. Universal Waste status reduces paperwork and shipping burden compared to full hazardous waste, but it is not "throw it in the truck." Crushing a CFL in the back of a packer truck releases elemental mercury vapor into the cab and triggers a RCRA spill response. Tossing residential mercury thermostats in the landfill load violates the disposal ban that 22+ states have adopted.

This SOP covers identification, containment, and routing for the four mercury-device categories crews see most often.

The four categories on a typical estate cleanout

  1. Compact fluorescent lamps (CFLs) and linear fluorescent tubes - mercury vapor in glass envelope (typically 1 to 5 mg per CFL)
  2. Wall thermostats with a mercury switch bulb - older round and rectangular thermostats from before about 2006; mercury bead is in a sealed glass ampoule (typically about 3 g per thermostat, far more than a CFL)
  3. Mercury switches in older appliances - chest freezers, gas range safety valves, washing machine lid switches
  4. Mercury thermometers and barometers - estate and basement finds

A single mercury thermostat contains hundreds of times more mercury than a single CFL. Train crews to prioritize thermostats first when sorting.

Identification cues

  • CFL or fluorescent tube: any spiral or straight glass tube with a base. Assume mercury content unless labeled LED.
  • Mercury thermostat: round dial Honeywell T87 or similar, or rectangular Honeywell T8775. Remove the cover plate; if you see a small silver-filled glass tube on a tilting platform, that is the mercury switch. Bimetal-coil-and-mercury-bulb design was standard until manufacturers phased it out.
  • Mercury switch in appliance: a small glass capsule (often gold or silver in color) wired into a control circuit. Visible only with the back panel off.
  • Mercury thermometer: silver fluid in the column. Red or blue fluid is alcohol, not regulated.

Containment protocol

CFLs and tubes:

  1. Do not break. Place upright in original cardboard sleeve if available, or in a cardboard tube container.
  2. Transport in a covered, rigid container on the truck (not loose in the bed).
  3. Route to a lamp-recycling drop-off (most home-improvement retailers participate) or to a Universal Waste handler if quantity justifies.

Mercury thermostats:

  1. Remove the entire thermostat from the wall; do not extract the mercury switch from the housing.
  2. Bag the whole thermostat in a sealed plastic bag, label "mercury thermostat - universal waste - ".
  3. Route to the Thermostat Recycling Corporation (TRC) collection program, which has free drop-off sites in most states for HVAC contractors and licensed haulers. Customer-direct take-back is also offered.

Mercury switches in appliances:

  1. Tag the appliance for separate handling.
  2. Remove the switch with the surrounding wire harness intact; do not cut the capsule.
  3. Bag and route with thermostats.

Mercury thermometers and barometers:

  1. Wrap intact in absorbent material (paper towel) inside a screw-top jar or rigid plastic container.
  2. Route to household hazardous waste (HHW) collection or a Universal Waste handler.

A broken CFL in an occupied space requires a specific cleanup procedure published by EPA: ventilate for 5 to 10 minutes, do not vacuum (it spreads vapor), pick up fragments with stiff paper and sticky tape, seal in a glass jar with a metal lid. A broken mercury thermostat or thermometer (significantly more mercury) is a hazmat call, not a sweep-up.

Universal Waste handler thresholds

40 CFR Part 273 defines two handler tiers based on the total quantity of universal waste accumulated on site at one time:

  • Small Quantity Handler of Universal Waste (SQHUW): less than 5,000 kg total
  • Large Quantity Handler of Universal Waste (LQHUW): 5,000 kg or more

A junk-removal operator's yard, if it holds devices pending transfer, must register as a handler at the appropriate tier with the state environmental agency. Holding for more than one year on site moves the device out of Universal Waste status and into full hazardous waste. Default operating rule: weekly or biweekly transfer to a permitted recycler; never accumulate.

Disposal-ban states

22+ states ban mercury thermostats from the municipal waste stream. Even where not banned, the federal Universal Waste rule still applies. Operate to the universal standard regardless of state, because mixed-state route work is common.

Crew checklist on every cleanout

Before the truck pulls out:

  1. Did anyone find a thermostat? Where is it now?
  2. Was a basement or attic with old fluorescent fixtures included in the haul? Are any tubes loose in the load?
  3. Did any appliance with a back-panel removed reveal a switch capsule?
  4. Are all mercury devices in the dedicated rigid container, not loose in the bed?

Document mercury-device count per job in the customer file with a photo of the rigid container before transfer.

References

  • Resource Conservation and Recovery Act (RCRA), 40 CFR Subchapter I
  • 40 CFR Part 273 (Universal Waste rule, including mercury-containing equipment)
  • 40 CFR 273.13 and 273.33 (SQHUW vs LQHUW accumulation limits)
  • EPA cleanup guidance for broken CFLs (search "EPA CFL broken bulb cleanup")

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