Are the any rules/regulations stating that you are not permitted to store items in the bottom of the flammable cabinet? (not on a bottom shelf, but the actual spill containment area bottom)
Good question, have not heard it asked before.
Plus I have never told anyone to not store there.
Will have to do some checking.
Depends on the cabinet??
And maybe designed for a specific gallon limit??
I am reading the bottom has to be liquid tight.
Some say up to two inches.
So I am also thinking the cabinet is not designed to contain all the liquid, if every container fails.
Hello. I agree that is a good question.
I am not aware of any regulations, unless it is perhaps an OSHA regulation. OSHA regulations may be the next best place to check.
Whatever is placed in the containment area would displace the spilled liquid and would decrease the amount of containment available. In lieu of codes, standards, or regulations; best practice would be to observe the largest container stored in the cabinet and make sure that amount of containment volume is available in the cabinet.
Basic containment principles prohibit materials that would minimize volume in containment basins. You can see this principle in all the secondary containment standards in NFPA, IFC, OSHA, etc. Cabinet manufacturers make a special shelf that will maintain the 2" basin (design requirement) and allow storage in the bottom of the cabinet. It is essentially a hollow shelve that fits in the bottom of the cabinet and keeps the storage above the rim of the 2" basin. See the following:
29 CFR 1910.106(b)(2)(vii)(c)(6)
NFPA 30, 188.8.131.52
Having a design requirement for a 2" basin and then not utilizing that 2" basin because it is used for storage would disqualify the UL/FM certification.
This is true. Per NFPA 30 22.2.8 Containment basins shall not hold materials that the basin was not designed to hold. Per NFPA 30, 184.108.40.206.1 the volume of tanks within diked areas shall be deducted from the containment capacity (during the sizing and design of the diked area).
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