Industry
Data-center cooling: empty IBC totes
A data-center cooling plant is dosed with glycol, corrosion inhibitor and biocide, and the chemicals arrive in 275 and 330 gallon totes. When the tote is empty, the SDS says which of three next lives it can have.
- Usual last contents
- Glycol, corrosion inhibitor, biocide
- Usual grades
- Rinsed, reconditioned, recycle
- Where in the metro
- Loudoun and Fairfax
- Loudoun data centers
- About 233 buildings (March 2026)
What a cooling plant empties
Chillers and cooling towers reject the heat that servers make. The water in them is treated against scale, corrosion and microbial growth, and the chemical suppliers for that work list totes among their packaged options. Brenntag says it delivers fluids to North American data centers in bulk or packaged options, including drums and totes. Univar Solutions lists bulk, totes and drums packaged in-house among its data-center offerings.
| Last contents | What to check | Usual next life |
|---|---|---|
| Glycol or heat-transfer fluid | The SDS and any dilution | Rinsed or reconditioned for the same product, or recycle |
| Corrosion inhibitor | The SDS; acute hazard flags | Recycle, or reconditioned for the same product |
| Biocide | Hazard classification; triple-rinse need | Recycle only unless the SDS is clear |
| Unknown | Nothing yet | Recycle only |
Why biocide totes are a smaller stream
A Xylem case study of a hyperscale data center describes intermittent biocide dosing, every 13 weeks being typical, with continuous UV disinfection, using 75% less biocide. Fewer doses mean fewer totes, but each one carries a stricter label. A biocide that is classed as an acute hazardous waste needs a triple rinse before the tote counts as empty.
That is why the Empty Check asks about the last contents before it looks at the heel.
Where it happens
Loudoun County has about 233 data center buildings and more than 10 million square feet permitted in 2025. Ashburn and Herndon have the clusters. No pickup has been confirmed in Loudoun, and the area page says so.
The EHS questions
- Who is the generator: the owner, the tenant or the water-treatment contractor?
- Does the SDS name an acute hazardous waste?
- Is the heel an inch or less?
- Is the cage straight and the valve sealed?
The three rulebooks sets Virginia DEQ beside DOEE and MDE for companies with sites in more than one jurisdiction.
Three jobs, three kinds of tote
The chemistry of a cooling loop has three jobs. Corrosion inhibitors protect the pipework. Biocides keep microbes from growing in the water. Glycol, in closed loops, protects against freezing and carries heat. Each is bought in the most convenient package for the volume, and totes are among them.
| Job | Chemical | What to expect in the empty |
|---|---|---|
| Protect pipework | Corrosion inhibitor | SDS with hazard classes; often reconditioned for the same product |
| Control microbes | Biocide | Strict labels; triple rinse if acute |
| Move and protect heat transfer | Glycol blend | Often rinsed; the SDS names the additives |
The contractor question
Many chiller plants are maintained by a water-treatment contractor. The contractor delivers the totes, dosing equipment draws from them, and the empties sit in a service yard. Who is the generator then: the owner, the tenant or the contractor? The answer decides who signs the paperwork and who answers a request.
We read the request from whoever sends it and ask that question if it is not clear.
What a data-center yard needs
- A flat, covered area for staging empties.
- A forklift or a pallet jack, because a loading dock may not exist.
- A tally by product, so glycol and biocide are not mixed.
- The SDS for each product on file.
Questions people ask
Are glycol totes hazardous?
It depends on the product and its additives, and the SDS says. The generator makes the waste determination, not us.
Can a biocide tote be reused?
Rarely. Most are recycle only unless the SDS and dates allow reconditioning for the same product.
How many totes does a data center empty?
We have no figure and will not invent one. It varies with the plant’s size and dosing schedule.
Keep reading
- Chemical emptiesTotes that held glycol, biocides, reagents or coatings: what is needed before they can be reconditioned, rebottled or recycled.
- Loudoun County, VALoudoun County has about 233 data center buildings. This page describes the chiller-plant totes they empty; no pickup is confirmed in the county yet.
- Triple rinsingWhen a tote must be triple rinsed (acute hazardous waste), what solvent to use, and where the rinsate goes.
Sources
- Data center fluids (Brenntag)
- Data center offerings (Univar Solutions)
- Data center chemical dosing case study (Xylem)
- Data centers: the Loudoun story (Loudoun County)
- 40 CFR 261.7, Residues of hazardous waste in empty containers (Cornell LII)
Last reviewed . General guidance, not legal advice.