Spill Containment Berms

Portable secondary containment for drums, equipment, and vehicles

A spill berm is the simplest piece of secondary containment a facility can buy: a flexible-wall pool that holds back whatever leaks out of what's sitting inside it. Park a 55-gallon drum on one, stage a generator on one, run a fuel transfer over one — if something releases, the berm holds the volume until cleanup arrives. They are the EPA SPCC and OSHA baseline answer for "you stored a hazardous liquid outside a permanent diked area."

Our standard berms come in two wall styles. The duck-pond design folds flat for storage and pops up with integrated foam ribs that bend under foot traffic and rebound — the right pick when workers need to walk in and out as part of daily workflow. The foam-wall design uses rigid foam stiffeners that hold sidewalls vertical regardless of load, better for static drum storage and higher fluid volume per square foot.

All standard berms here are built from 22 oz/yd² PVC-coated polyester fabric in safety yellow — chemically resistant to petroleum products, hydraulic fluids, glycol coolants, mild acids and bases, and most common solvents. For drive-over applications where a vehicle must roll on and off, see our L-bracket spill berms in 30 oz/yd² PVC with reinforced corner construction.

Sizing

Pick footprint by what's going inside the berm:

•       2'×2' / 3'×3': Single drum, machine drip pan, small generator.

•       4'×4' / 5'×5' / 6'×6': Drum pallet, mid-size equipment, transfer staging.

•       4'×6' / 4'×8': Long footprints — generators, light vehicles, IBC totes.

•       8'×8' / 8'×10': Multiple drums, tanker offload, large equipment under maintenance.

Capacity calculation rule of thumb: length × width × wall height in inches × 0.62 = gallons. A 5'×5' berm with 6" walls holds about 75 gallons before overflow. For full IBC tote containment, step up to 8'×10' or use a dedicated 4-drum spill pallet with sumped containment.

Where berms fit in a spill plan

For permanent indoor drum storage, pair with spill containment pallets for code-required secondary containment under each drum. For temporary staging — a contractor on site, a fuel transfer event, a portable generator at a remote location — a berm gets you compliant in minutes without floor anchors or permits. For long perimeters or runway-style containment, see our modular spill berm barriers and Bend-N-Seal flexible spill barriers.

Call 888-774-5528 for bulk pricing or chemical compatibility on specific fluids. Same-day shipping on stocked sizes from our Ohio warehouse.

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Spill berm specifications, applications, and compliance

Material and chemical compatibility

22 oz/yd² PVC-coated polyester is the industry standard fabric for portable spill containment. It's chemically compatible with petroleum products (motor oil, hydraulic fluid, diesel, gasoline), most lubricants, glycol coolants, mild acids and bases, and water. It is not recommended for prolonged contact with aromatic solvents (toluene, xylene), ketones (acetone, MEK), or chlorinated solvents — those degrade PVC over time and require urethane or specialty-coated containment. If your application involves any of those chemistries, call before ordering with the SDS in hand.

Calculating required capacity

EPA SPCC under 40 CFR 112.7(c) requires secondary containment sized to hold the largest single container plus an allowance for precipitation in outdoor settings. The working rule for outdoor containment is:

Required capacity = largest container volume + 24-hour, 25-year storm rainfall accumulation.

For a 275-gallon IBC tote stored outdoors, that's roughly 275 gallons plus (footprint × expected rainfall in inches / 12 × 7.48). In most US regions, a 4'×6' berm with 6" walls (~110 gallon capacity) is undersized for a full IBC — step up to 8'×10' or use a covered IBC heating blanket setup on a pallet for indoor staging. For indoor drum storage the rainfall component drops out, and a 2'×2' berm is sufficient for a single 55-gallon drum.

Duck-pond vs. foam-wall: which to choose

Duck-pond berms have pop-up foam ribs that bend under traffic and rebound — ideal when workers walk in and out as part of the job. Foam-wall berms have continuous rigid foam sidewalls that stay vertical regardless of fluid load — better for permanent or semi-permanent stations. Most facilities buy both: duck-pond for high-traffic transfer areas, foam-wall for static drum staging. For applications where vehicles must drive into and out of the containment area, neither works; use L-bracket berms with reinforced 30 oz PVC and load-rated walls.

Drain options

Foam-wall berms in 4'×6' and larger ship with a drain option — typically a 3/4" or 1" ball valve in the corner — so accumulated rainwater can be released to a treatment system or vacuum truck without opening the berm. Specify drain side and size on your PO if site geometry matters.

When to use a berm vs. another containment product

•       Permanent indoor drum storage → spill containment pallet.

•       Temporary outdoor drum staging → spill berm with drum cover.

•       Vehicle drive-over containment → L-bracket spill berm.

•       Long perimeter spill control → Bend-N-Seal flexible barrier or modular berm kit.

•       Point-source equipment drip catch → drip tray for permanent, berm for portable.

Cleanup after deployment

When a spill happens inside a berm: stop the source if safe; pump out free liquid with a hand pump or vacuum truck before the wall sees prolonged exposure; absorb residual with universal pads or oil-only pads matched to the fluid; inspect the berm interior for chemical attack — flex the PVC, look for stiffness or discoloration; wash with mild detergent and water, dry fully, fold flat for storage. A berm that has held a serious solvent or strong acid release should be replaced regardless of visual condition, because small-molecule chemicals penetrate the coating and shorten future life.

Storage and lifespan

Stored flat, out of direct sunlight, with the interior clean and dry, a PVC berm has a 7–10 year service life. UV exposure is the primary aging factor for berms left deployed outdoors year-round. For permanent outdoor stations, rotate berms periodically or add a drum cover canopy over the storage area.

Bulk orders

Multi-berm orders — outfitting a fleet of contractor trucks, a chain of substations, or a corporate fleet rollout — qualify for volume pricing. Call 888-774-5528 or submit through the contact page with quantities, sizes, and any chemical compatibility constraints.

Spill Containment Berms — Frequently Asked Questions

What is a spill berm and when is it required?

A spill berm is a flexible-walled portable containment basin that captures a release from whatever's placed inside it — a drum, a generator, a fuel transfer setup. EPA SPCC (40 CFR 112.7(c)) requires secondary containment sized for the largest single container at facilities storing oil over threshold quantities, and most state and municipal fire codes layer on similar rules for flammable and combustible liquids. A berm is the simplest way to meet that requirement for portable or temporary storage.

What's the difference between duck-pond and foam-wall berms?

Duck-pond berms have pop-up foam ribs that bend when stepped on and rebound, so workers walk in and out freely. Foam-wall berms have continuous rigid foam sidewalls that stay vertical regardless of fluid load. Pick duck-pond for high-traffic transfer areas where the berm is part of daily workflow; pick foam-wall for static drum storage and applications where you want maximum usable wall height.

What chemicals are 22 oz PVC berms compatible with?

22 oz PVC-coated polyester is compatible with petroleum products (motor oil, hydraulic fluid, diesel, gasoline), most lubricants, glycol coolants, mild acids and bases, and water. It is NOT recommended for prolonged contact with aromatic solvents (toluene, xylene), ketones (acetone, MEK), or chlorinated solvents — those degrade PVC over time. For aggressive chemistries, call 888-774-5528 with the SDS in hand.

How do I calculate the right berm size?

For indoor drum storage: capacity must equal the largest single container (typically a 55-gallon drum, so a 2'x2'x6" berm works). For outdoor: largest container plus 24-hour, 25-year storm rainfall accumulation. Capacity rule of thumb is length × width × wall height in inches × 0.62 = gallons. A 5'x5'x6" holds about 75 gallons before overflow.

Can a vehicle drive over these berms?

Not these. Standard duck-pond and foam-wall berms are walked-into. For drive-over containment where a vehicle must enter and exit (truck wash, fueling pad, generator service), use our L-bracket spill berms with 30 oz reinforced PVC and load-rated corners.

Do the foam-wall berms have drains?

Yes — foam-wall berms in 4'x6' and larger ship with a corner drain option, typically a 3/4" or 1" ball valve. The drain lets you release accumulated rainwater to a treatment system or vacuum truck without breaking down the berm. Specify drain side on your PO if site geometry matters.

How long do PVC spill berms last?

Stored flat, indoors, with the interior clean and dry, 7–10 years. UV exposure shortens that significantly for berms left deployed outdoors year-round. For permanent outdoor stations, rotate berms periodically or add a drum cover/canopy. Berms that have held strong solvents or aggressive acids should be replaced regardless of visual condition.

Can I store an IBC tote in one of these berms?

Only the largest sizes work. A 275-gallon IBC needs at least 275 gallons of containment volume plus a rainfall allowance for outdoor placement. An 8'x10'x6" berm holds about 300 gallons, which works indoors. For outdoor IBC storage, use a larger berm with taller walls or pair the IBC with a dedicated IBC pallet plus canopy.

Do you offer bulk pricing on berm orders?

Yes. Multi-berm orders — outfitting a fleet, a chain of remote sites, or a project rollout — qualify for volume pricing. Call 888-774-5528 or use the contact page with sizes, quantities, and any chemical compatibility constraints.

How fast do orders ship?

Stocked sizes ship same-day from our Solon, Ohio warehouse on orders placed before the daily cutoff. Larger berms typically ship by ground freight; transit estimates are confirmed on order. See the shipping page for details.

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