Oregon Closure/Post-Closure Plans regulations & environmental compliance analysis

Oregon Closure/Post-Closure Plans: What you need to know

Governing Law and Regulations

Hazardous waste treatment, storage, and disposal facility (TSDF) closure and post-closure rules: Oregon Administrative Rules (OAR) 340-100-0002(1), OAR 340-104-0228, and OAR 340-104-0258

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Closure and post-closure fees: OAR 340-105-0110 and OAR 340-105-0113

Facility-specific rules:

Surface impoundment closure rules: 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's closure and post-closure rules for hazardous waste treatment, storage, and disposal facilities (TSDFs) include the federal requirements with several more state provisions that make the state's requirements more stringent than the federal rules.

In addition to complying with the general closure and post-closure standards, owners or operators of the various types of TSDFs have to meet closure and post-closure standards specific to their facility types. Oregon follows the federal rules specific to facilities using containers, hazardous waste storage tanks, hazardous waste landfills, and land treatment units, and has additional requirements for surface impoundments.

Administration and enforcement. DEQ's Land Quality Division administers and enforces the closure and post-closure rules in Oregon.

State Requirements


OAR 340-105-0110 and OAR 340-105-0113

Annual compliance determination fee. TSDFs pay DEQ a compliance determination fee for each year that the facility is in closure (OAR 340-105-0113(3)). Fees range from $18,750 to $150,000, depending on the type of facility ...

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