OAR 340-150-0420
Release Detection Requirements for Hazardous Substance UST Systems

(1)

An owner and permittee of an UST system containing a hazardous substance other than petroleum must provide release detection that meets the requirements of this rule.

(2)

Secondary containment systems. An owner and permittee may use the provisions of 40 CFR § 265.193, “Containment and Detection of Releases” to comply with this section of the rule. Secondary containment systems must be designed, constructed and installed to:

(a)

Contain regulated substances released from the UST system until they are detected and removed; and

(b)

Prevent the release of regulated substances to the environment at any time during the operational life of the UST system.

(3)

Multiwalled USTs must be designed, constructed and installed to:

(a)

Contain a release from any portion of the inner tank within the outer wall; and

(b)

Detect the failure of the inner wall.

(4)

External liners (including vaults) must be designed, constructed and installed to:

(a)

Contain 100 percent of the capacity of the largest tank within its boundary;

(b)

Prevent the interference of precipitation or groundwater intrusion with the ability to contain or detect a release of regulated substances; and

(c)

Surround the tank completely (i.e., it is capable of preventing lateral as well as vertical migration of regulated substances).

(5)

Underground piping must be equipped with secondary containment that satisfies the requirements of section (2) of this rule (e.g., trench liners, jacketing of double walled pipe). In addition, underground piping that conveys regulated substances under pressure must be equipped with an automatic line leak detector in accordance with OAR 340-150-0410 (Release Detection Requirements and Methods for Underground Piping)(2).

(6)

An owner and permittee must monitor the UST system for releases every 30 days and record the results for each month.

(7)

An owner and permittee must retain at a minimum the most current 12 consecutive months of release detection records.

(8)

An owner and permittee must report to the department any release detection failure indicating the possibility of a release within 24 hours as a suspected release (OAR 340-150-0500 (Reporting Suspected Releases)) and immediately begin investigation in accordance with 340-150-0510 (Suspected Release Investigation and Confirmation Steps).

(9)

An owner and permittee may use an alternative method of release detection if the proposed method is approved by the department in writing before installation of the UST system or addition of the release detection method. To obtain approval from the department, an owner and permittee must submit the following information for review:

(a)

Technical, scientific data and reports that demonstrate that the proposed alternate method can detect a release of the stored hazardous substance as effectively as any of the methods allowed in OAR 340-150-0450 (Automatic Tank Gauging Release Detection Method) through 340-150-0470 (Other Methods of Release Detection) can detect a release of petroleum; and

(b)

Information on the effective corrective action technologies, health and environmental risks and chemical and physical properties of the stored substance and the geologic characteristics of the UST facility.
[Publications: Publications referenced are available from the agency.]

Source: Rule 340-150-0420 — Release Detection Requirements for Hazardous Substance UST Systems, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=340-150-0420.

340‑150‑0001
Purpose and Scope 340‑150‑0006
Applicability and General Requirements 340‑150‑0008
Exemptions and Deferrals 340‑150‑0010
Definitions 340‑150‑0020
UST General Permit Registration Certificate Required 340‑150‑0021
Termination of Temporary Permits 340‑150‑0052
Modification of Registration Certificates For Changes in Ownership and Permittee 340‑150‑0080
Denial, Suspension or Revocation of General Permit Registration Certificates 340‑150‑0102
Termination of General Permit Registration Certificates for Installation, Operation and Temporary Closure 340‑150‑0110
UST General Permit Registration, Annual Compliance and Other Fees 340‑150‑0135
General Requirements for Owners and Permittees 340‑150‑0137
UST Systems with Field-Constructed Tanks and Airport Hydrant Fuel Distribution Systems 340‑150‑0140
Requirements for Sellers of USTs 340‑150‑0150
Depositing Regulated Substances in USTs 340‑150‑0152
Requirements for Distributors of Regulated Substances for Deposit into USTs 340‑150‑0156
Performance of UST Services by Owners or Permittees 340‑150‑0160
General Permit Requirements for Installing an UST System 340‑150‑0163
General Permit Requirements for Operating an UST System 340‑150‑0167
General Permit Requirements for Temporary Closure of an UST System 340‑150‑0168
General Permit Requirements for Decommissioning an UST System by Permanent Closure or Change-in-Service 340‑150‑0180
Site Assessment Requirements 340‑150‑0200
Training Requirements for UST System Operators and Emergency Response Information 340‑150‑0210
Training Requirements for UST Operators 340‑150‑0250
Expedited Enforcement Process 340‑150‑0302
Installation of Used USTs 340‑150‑0310
Spill and Overfill Prevention Equipment and Testing Requirements 340‑150‑0315
Periodic operation and maintenance walkthrough inspections 340‑150‑0320
Corrosion Protection Performance Standards for USTs and Piping 340‑150‑0325
Operation and Maintenance of Corrosion Protection 340‑150‑0350
UST System Repairs 340‑150‑0352
UST System Modifications and Additions 340‑150‑0354
UST System Replacements 340‑150‑0360
Requirements for Internally Lined USTs 340‑150‑0400
General Release Detection Requirements for Petroleum UST Systems 340‑150‑0410
Release Detection Requirements and Methods for Underground Piping 340‑150‑0420
Release Detection Requirements for Hazardous Substance UST Systems 340‑150‑0430
Inventory Control Method of Release Detection 340‑150‑0435
Statistical Inventory Reconciliation Method of Release Detection 340‑150‑0440
Manual Tank Gauging Release Detection Method 340‑150‑0445
Tank Tightness Testing for Release Detection and Investigation 340‑150‑0450
Automatic Tank Gauging Release Detection Method 340‑150‑0465
Interstitial Monitoring Release Detection Method 340‑150‑0470
Other Methods of Release Detection 340‑150‑0500
Reporting Suspected Releases 340‑150‑0510
Suspected Release Investigation and Confirmation Steps 340‑150‑0520
Investigation Due to Off Site Impacts 340‑150‑0540
Applicability to Previously Closed UST Systems 340‑150‑0550
Definitions for OAR 340-150-0555 and 340-150-0560 340‑150‑0555
Compliance Dates for USTs and Piping 340‑150‑0560
Upgrading Requirements for Existing UST Systems 340‑150‑0600
Delegation of Program Administration 340‑150‑0620
Approval of More Stringent Performance Standards
Last Updated

Jun. 8, 2021

Rule 340-150-0420’s source at or​.us