Pallet Rack Spill Containment: 4 Questions That Decide It (With EPA Rules and Real Prices)
Pallet rack spill containment comes in two forms, and the drums decide which one you need. An in-rack sump sits on the beams under the pallet and is the right buy when the rack level itself has to hold a spill: the UltraTech Ultra-Rack Sump holds 66 gallons, which covers four 55-gallon drums under the EPA's 40 CFR 264.175 math. An under-rack containment tray slides beneath the bottom shelf and is the right buy when the job is catching drips and small leaks from pails and cans, not holding a drum's worth of liquid. On Warehouse Gear Hub the Rack Sump is $520.00 without a drain and $561.00 with one, the steel model is $6,234.00, and the Rack Containment Trays run $74.00 to $266.00. The four questions below take you from the rack bay to the part number, with the EPA rule quoted from eCFR, the OSHA storage rules quoted from osha.gov, and every dimension and capacity from UltraTech's spec pages.
- What does the EPA require for drums stored on a pallet rack?
- Question 1: Does the rack level have to be the containment, or do you need a drip catcher under it?
- Question 2: Will the beams and the bay take the sump?
- Question 3: Is the liquid flammable, and how much of it is on the rack?
- Question 4: How will you empty it, and who checks it?
- Which pallet rack spill containment should you buy?
- Frequently asked questions
What does the EPA require for drums stored on a pallet rack?
The rule containment makers size to is 40 CFR 264.175. It is written for hazardous waste container storage areas, and its math carries over to any drum of liquid you would rather not see on the floor. Paragraph (b)(1) calls for a base under the containers that is free of cracks or gaps and "sufficiently impervious to contain leaks, spills, and accumulated precipitation" until the material is detected and removed. Under (b)(2), the base must slope or drain, unless the containers are raised off it or otherwise protected from contact with the liquid. The sizing line is (b)(3): the system must hold 10 percent of the volume of all the containers or the volume of the largest container, whichever is greater, and containers that hold no free liquids do not count toward the total.
Run that for one rack level. One 55-gallon drum needs 55 gallons of containment. Four drums total 220 gallons, 10 percent of that is 22, and the largest container is still 55, so the level needs 55 gallons. The 66-gallon Ultra-Rack Sump clears it with 11 gallons to spare. The 24-gallon three-tray Rack Containment Tray does not, and UltraTech's own page says the tray "may not address any specific regulations." Paragraph (b)(5) adds the operating rule: spilled material must be removed from the sump "in as timely a manner as is necessary to prevent overflow," which is Question 4 below.
Oil has its own rule. Under 40 CFR 112.8(c)(2), a facility with an SPCC plan needs "a secondary means of containment for the entire capacity of the largest single container," and for mobile or portable containers, 112.8(c)(11) calls for containment "sufficient to contain the capacity of the largest single compartment or container." The plan itself is triggered above 1,320 U.S. gallons of aggregate aboveground oil storage, counting only containers of 55 gallons or more. Twenty-four drums of hydraulic oil on a rack is exactly 1,320 gallons; the twenty-fifth drum puts the facility over the line. Our containment berm sizing guide covers the SPCC side in full.
Question 1: Does the rack level have to be the containment, or do you need a drip catcher under it?
This question decides most purchases on its own. If a drum of liquid sits on a rack level, the containment has to be under that drum, on that level. A tray on the floor two shelves down catches what makes it past the pallets above, not the 55 gallons that come out when a drum splits. That is the in-rack sump's job. Per UltraTech's spec page, the Ultra-Rack Sump is a 51.5 x 51.5 x 12 inch polyethylene basin, 49 x 49 inches inside, that is "designed to fit on any standard industrial racking," holds up to four 55-gallon drums on a standard 40 x 48 or 48 x 48 wooden pallet, and stays positioned on the rack when the pallet and drums are lifted out, so the forklift has direct access to the pallet. The walls are translucent yellow, so a walk past the bay shows whether anything has collected.
The under-rack tray is a different tool. Per UltraTech's Rack Containment Tray page, the trays are 2.8 inches tall and "slide easily under pallet racking and shelving," below the bottom shelf, to capture small leaks, drips, and spills from the palletized contents stored above. The single tray holds 8 gallons, the two-tray system 16, the three-tray system 24, and the 2373 connector lays across two trays so a spill cannot run between them. That is the right buy for a bottom shelf of 5-gallon pails, quart cans, and jugs of cleaner, where the tray's job is to keep the aisle dry. 29 CFR 1910.176(c) is the rule behind that job: storage areas "shall be kept free from accumulation of materials that constitute hazards from tripping, fire, explosion, or pest harborage." UltraTech does not claim a regulation for the trays, so treat them as housekeeping, not as the 264.175 answer for a drum.
| Model we stock | Where it goes | Outside size, per UltraTech | Sump capacity | What it covers | Price as listed |
|---|---|---|---|---|---|
| UltraTech 2395 Rack Sump, no drain | On the beams, under the pallet | 51.5 x 51.5 x 12 in, 50 lb | 66 gal | Up to four 55 gal drums on a 40 x 48 or 48 x 48 pallet | $520.00 |
| UltraTech 2396 Rack Sump, with drain and ball valve | On the beams, under the pallet | 51.5 x 51.5 x 12 in, 50 lb | 66 gal | Same four drums, drains through a 3/4 in hose on the rack | $561.00 |
| UltraTech 2397 Rack Sump, steel | On the beams, spans a 96 in bay | 96 x 50 in, 200 lb, 12-gauge galvanized | 90 gal | 55 gal drums and smaller containers, not IBC totes | $6,234.00 |
| UltraTech 2370 Rack Containment Tray, single | Under the bottom shelf | 44 x 23.5 x 2.8 in, 6.5 lb | 8 gal | Drips and small leaks from pails and cans above | $74.00 |
| UltraTech 2371 Rack Containment Tray, two-tray system | Under the bottom shelf | 48 x 44 x 2.8 in, 17 lb | 16 gal | Two trays and one connector for a wider shelf | $172.00 |
| UltraTech 2372 Rack Containment Tray, three-tray system | Under the bottom shelf | 72 x 44 x 2.8 in, 27 lb | 24 gal | Three trays across a 72 in run | $266.00 |
Read the capacity column against the largest container on the level. A 55-gallon drum needs 55 gallons under it, and only the two sumps have that. A row of 5-gallon pails needs 5, and any of the trays has that, provided the shelf above lets a leak reach it.
66 gallon sump, 51.5 x 51.5 x 12 in outside, 49 x 49 in inside, holds four 55-gallon drums on a 40 x 48 or 48 x 48 pallet, bottom-mounted ball valve takes a standard 3/4 in hose, translucent yellow polyethylene, 50 lb, five-year warranty.
Question 2: Will the beams and the bay take the sump?
A pallet rack is rated by its beams, and the number on the load plaque is the number that governs. A poly Ultra-Rack Sump weighs 50 pounds empty; the steel model weighs 200. A spill does not add weight to the level, it moves it: liquid that was in a drum is now in the sump. What the beam pair has to carry is the full pallet plus the sump. Four 55-gallon drums of a water-weight liquid hold 220 gallons, and at the 8.34 pounds per gallon USGS uses for water, that is about 1,835 pounds of liquid before you count the drums, the pallet, and the sump. If the plaque on the upright reads lower than that, the level is not a drum level, sump or no sump. 29 CFR 1910.176(b) is the OSHA line: "Storage of material shall not create a hazard," and containers stored in tiers "shall be stacked, blocked, interlocked and limited in height so that they are stable and secure against sliding or collapse."
Then measure the bay. The poly sump is 51.5 inches square, so a 96-inch beam fits one sump with room beside it, and two sumps need 103 inches, which means a 108-inch beam or longer. The sump is 12 inches tall, so add 12 inches to the clear height that level needs for the pallet and drums. The steel 2397 is 96 x 50 inches and spans a 96-inch bay on its own; per UltraTech, a forklift can load it at levels 6 feet or lower, and higher levels need chains or straps, which are not included. Measure the clear opening between uprights and the beam-to-beam height before you order, and call us with the numbers if the bay is not a standard size.
Question 3: Is the liquid flammable, and how much of it is on the rack?
Flammables change the material and the quantity. UltraTech builds the steel 2397 for this case: per its spec page, 12-gauge galvanized steel that "will not melt or deform from extreme heat or fire," two removable grates for cleanup, and a 90-gallon sump that meets 40 CFR 264.175 for 55-gallon drums and smaller containers. The same page says it "will NOT meet the regulations for an intermediate bulk container (IBC)," and there is no drain option. The poly sumps and trays are the pick for acids, caustics, and water-based chemicals, where corrosion is the enemy and fire is not.
Quantity is OSHA's side of it. In an industrial plant, 29 CFR 1910.106(e)(2)(ii)(b) caps the liquid that sits outside an inside storage room or storage cabinet in any one fire area at 25 gallons of Category 1 flammable liquids in containers and 120 gallons of Category 2, 3, or 4 flammable liquids in containers. Two 55-gallon drums of a Category 3 liquid on a rack sump is 110 gallons; a third drum puts that fire area over the limit and into a storage room. A dedicated flammable liquid warehouse works under 1910.106(d)(5)(vi) and Table H-14 instead, where the total in the building is not restricted, each pile of unprotected Category 1 is capped at 660 gallons (12 drums), containers in piles are separated by pallets or dunnage where needed for stability, no container sits more than 12 feet from an aisle, and no pile is closer than 3 feet to the nearest beam, chord, girder, or other obstruction. The sump does not change any of those numbers. It keeps a leak on the level where it started instead of on the floor under the whole bay.
Question 4: How will you empty it, and who checks it?
40 CFR 264.175(b)(5) requires spilled material to be removed from the sump "in as timely a manner as is necessary to prevent overflow." On a rack, that means getting liquid out of a basin that can sit well above the floor with a pallet of drums standing in it. UltraTech builds two answers. The 2396 has a bottom-mounted ball valve: connect a standard 3/4-inch hose, route the other end into an approved container, and open the valve. The 2395 has no valve, so draining it means a pump, or lifting the pallet out and the sump down. The $41.00 difference between them buys the valve, and on any level a forklift has to reach, that is the better buy.
The weekly check is a walk past the bay. The translucent yellow walls show liquid from the floor, so nobody climbs to look. The under-rack trays are the opposite case: at 2.8 inches tall and 6.5 to 27 pounds, they slide out, get emptied into a drum, and slide back, and nothing comes off the rack. Put the sump check on the same sheet as the forklift's daily inspection and the eyewash station's weekly test so it happens on schedule.
Same 66 gallon basin as the 2396 with a sealed bottom: 51.5 x 51.5 x 12 in, four 55-gallon drums on a 40 x 48 or 48 x 48 pallet, translucent yellow polyethylene, 50 lb, nests for shipping, five-year warranty. Drained by pump.
Two 8 gallon trays and one 2373 connector, 48 x 44 x 2.8 in assembled, 16 gallons total, black LLDPE, 17 lb, slides under the bottom shelf of pallet racking or shelving to catch drips from pails and small containers.
Which pallet rack spill containment should you buy?
Match the rack level to the line that describes it.
- Four 55-gallon drums of oil, coolant, or a water-based chemical on one level, and you want to drain it in place: UltraTech 2396 Rack Sump with drain ($561.00). 66 gallons, 51.5 inches square, 12 inches tall, 3/4 inch hose connection.
- Same level, with a pump on site or a level low enough to bring down: UltraTech 2395 Rack Sump, no drain ($520.00). Same basin, sealed bottom.
- Flammable liquids in drums on a 96-inch bay: UltraTech 2397 steel Rack Sump ($6,234.00). 90 gallons, 12-gauge galvanized steel, two removable grates, no drain, forklift-loaded at 6 feet or lower.
- Pails, cans, and jugs on the bottom shelf, and the aisle has to stay dry: UltraTech 2370 single tray ($74.00) for a 44 x 23.5 inch footprint, 2371 two-tray system ($172.00) for 48 x 44, 2372 three-tray system ($266.00) for 72 x 44, and a 2373 connector ($31.00) between any two trays you add.
- Drums that come off the rack to be used or dispensed: UltraTech 1000 Spill Pallet P4 ($467.00) on the floor. 66 gallons, four drums, fork pockets. Our spill pallet sizing guide runs the 264.175 math for one to four drums, and the spill deck vs spill pallet guide covers the low-profile option.
- IBC totes: not on a rack sump. UltraTech states the steel model will not meet the regulations for an IBC, and the poly sump is sized for drums on a 40 x 48 or 48 x 48 pallet. Our IBC spill pallet guide has the tote math.
Every unit above is in the Rack Sump and Rack Containment collections, and the floor units are in Spill Pallets and Decks. Warehouse Gear Hub is an authorized UltraTech dealer, we match prices, and a multi-bay order gets a volume quote. If the bay lands between two lines, call 1-800-794-1049, 8 AM to 4 PM Central, with the beam length, the beam-to-beam height, the plaque rating, and what is in the drums. We will size it in one call and send a written quote for approval.
66 gallon sealed sump for up to four 55-gallon drums on the floor, removable slip-resistant grating, 2-way fork pockets for empty relocation, polyethylene with UV inhibitors. The pick when the drums leave the rack to be dispensed.
Frequently Asked Questions
Do drums stored on pallet racks need secondary containment?
If the drum holds a hazardous waste, 40 CFR 264.175 requires a containment system under the containers with a base free of cracks or gaps, sized to 10 percent of the total container volume or the volume of the largest container, whichever is greater. If it holds oil at a facility with an SPCC plan, 40 CFR 112.8(c)(2) and (c)(11) require containment for the entire capacity of the largest single container. In both cases the containment belongs under the drum on its own level. A tray under the bottom shelf is a drip catcher for the shelf above it, not a base under a drum three levels up.
How much containment does a rack level with four 55-gallon drums need?
55 gallons. Four drums total 220 gallons, 10 percent of that is 22 gallons, the largest container is 55 gallons, and 264.175(b)(3) takes the greater number. The 66-gallon poly Ultra-Rack Sump and the 90-gallon steel model both clear it. The same 55 gallons applies to one, two, or three drums, because the largest container stays 55.
Can a rack containment tray replace a spill pallet?
Not for drums. The UltraTech trays hold 8, 16, or 24 gallons, sit under the bottom shelf at 2.8 inches tall, and UltraTech states they "may not address any specific regulations." They are for drips and small leaks from pails and cans. A 55-gallon drum on the floor goes on a spill pallet with at least 55 gallons of sump, and a drum on a rack level goes on a rack sump.
How much weight does a rack sump add to a pallet rack beam?
50 pounds for the poly Ultra-Rack Sump and 200 pounds for the steel model, per UltraTech. A spill moves weight from the drum to the sump rather than adding it. The load the beam pair has to be rated for is the full pallet plus the sump: four 55-gallon drums of a water-weight liquid hold about 1,835 pounds of liquid at USGS's 8.34 pounds per gallon, before the drums and the pallet. Check the plaque on the upright before any drum goes on a level.
Can you put an IBC tote on a rack sump?
No. UltraTech states the steel 2397 "will NOT meet the regulations for an intermediate bulk container (IBC)," and the poly sump is sized for four 55-gallon drums on a 40 x 48 or 48 x 48 pallet. A tote needs containment sized to its own volume under the largest-container rule. Our IBC spill pallet guide has the math for one to five totes.
How much does pallet rack spill containment cost?
On Warehouse Gear Hub as of this writing, the UltraTech 2395 Rack Sump without a drain is $520.00, the 2396 with drain and ball valve is $561.00, and the 2397 steel Rack Sump is $6,234.00. The Rack Containment Trays are $74.00 for a single tray, $172.00 for the two-tray system, $266.00 for the three-tray system, and $31.00 for a 2373 connector. A floor spill pallet for four drums, the UltraTech 1000, is $467.00.
Measure the bay, run the math, buy once
In-rack sumps in polyethylene and steel, under-rack containment trays, and floor spill pallets from UltraTech, with sump capacity and dimensions on every product page.
Shop rack sumps →Questions on bay fit, beam ratings, or a multi-bay quote: call 1-800-794-1049 (8 AM to 4 PM Central) or email info@warehousegearhub.com.