Oregon Surface Impoundments regulations & environmental compliance analysis

Oregon Surface Impoundments: What you need to know

Governing Law and Regulations

Hazardous waste surface impoundment requirements: Oregon Administrative Rules (OAR) 340-100-0002(1) (permitted and interim-status facilities)

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Operating standards:

Disposal prohibition: OAR 340-104-0220

Closure: OAR 340-104-0228

Regulatory Agency

Oregon Department of Environmental Quality (DEQ) Land Quality Division Hazardous Waste Program

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Oregon has incorporated by reference the federal surface impoundment requirements, including the organic air emissions standards. Oregon does not allow the disposal of hazardous waste in surface impoundments and has additional rules in connection with closure, permit application requirements, and fees.

Administration and enforcement. DEQ's Land Quality Division administers and enforces the rules for surface impoundments in Oregon.

State Requirements


Oregon's permit requirements for surface impoundments include the federal standards plus the state's additional rules in connection with the permit application process, permit conditions, permit modifications, and fees. See the state section TSDF PERMITS to review the permit application process and the various state fees.


Disposal Prohibition

OAR 340-104-0220

Unlike the federal rules, the Oregon hazardous waste regulations do not allow the disposal of hazardous waste in its surface impoundments.

Closure and Post-Closure Plans

OAR 340-104-0228

Oregon follows the federal closure and post-closure rules for hazardous waste surface impoundments, with additional state requirements for closure of the management ...

Read more about Surface Impoundments