Accumulation Time: What you need to know

Governing Law and Regulations

Resource Conservation and Recovery Act (RCRA), 42 USC 6922 and 42 USC 6924

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Transfer facility accumulation period: 40 CFR 263.12

Large quantity generators (LQGs):

90-day accumulation time rule for LQGs: 40 CFR 262.34(a) and 40 CFR 262.34(b)

Accumulation time rule for LQGs accumulating F006: 40 CFR 262.34(g) to (i)

Small quantity generators (SQGs):

180-day accumulation time rule for SQGs: 40 CFR 262.34(d)

270-day accumulation time rule for SQGs: 40 CFR 262.34(e)

LQGs and SQGs:

Satellite accumulation: 40 CFR 262.34(c)

Returned shipments: 40 CFR 262.34(m)

Accumulation time rule for conditionally exempt small quantity generators (CESQGs): 40 CFR 261.5

Extensions and exceptions:

Extensions beyond 90 days for LQGs: 40 CFR 262.34(b) and 40 CFR 262.34(i)

Extensions beyond 180 days (or 270 days) for SQGs: 40 CFR 262.34(f)

Regulatory Agency

U.S. Environmental Protection Agency (EPA) Office of Solid Waste and Emergency Response (OSWER)

See ADDRESSES & CONTACTS for addresses and telephone numbers.


A generator of hazardous waste may accumulate (store) hazardous waste on-site without a storage permit, provided the generator complies with the "accumulation rule" for generators set forth at 40 CFR 262.34. The accumulation rule consists of requirements applicable to LQGs (persons generating 1,000 kilograms (kg) or more of hazardous waste or more than 1 kg of acutely hazardous waste per month) and SQGs (persons generating more than 100 kg but less than 1,000 kg of hazardous waste and up to 1 kg of acutely hazardous waste per month). Although not subject to accumulation time limitations, CESQGs are subject to quantity limitations under the accumulation rule. The rule's requirements address:

  • The quantity of ...

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More on this topic:

Governing Law and Regulations
Regulatory Agency
LQG Time and Quantity Limitations
SQG Time and Quantity Limitations
LQGs and SQGs
Extensions and Exceptions
Additional Guidance

State Requirements

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Accumulation Time Resources

Accumulation Time Products

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This special report will explain the federal container management rules applicable to both TSDF owners and operators storing hazardous waste in containers and to generators accumulating hazardous waste on-site in containers. The report will address how to determine if a container is empty, the applicability of the air emissions control standards, and satellite accumulation by generators. "
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