Oregon Administrative Rules
Chapter 340 - DEPARTMENT OF ENVIRONMENTAL QUALITY
Division 150 - UNDERGROUND STORAGE TANK RULES
Section 340-150-0410 - Release Detection Requirements and Methods for Underground Piping
Current through Register Vol. 63, No. 3, March 1, 2024
(1) For underground piping that routinely contains a regulated substances, an owner and permittee of a petroleum UST system must provide release detection which meets the requirements of this rule.
(2) Pressurized piping. For underground piping that conveys regulated substances under pressure, an owner and permittee must insure that the piping is equipped with an automatic line leak detector that alerts an owner and permittee to the presence of a leak by restricting or shutting off the flow of regulated substances through underground piping or by triggering an audible or visual alarm. Interstitial monitoring sensor systems or stand alone "sump" sensors are not an acceptable alternative for a line leak detector. In addition,
(3) In addition to the requirements of section (2) of this rule, an owner and permittee with pressurized piping must conduct an annual line tightness test that can detect a 0.1 gallon per hour leak rate at one and one-half times the operating pressure. Interstitial monitoring sensors may replace the annual line tightness test if:
(4) Suction piping. For underground piping that conveys a regulated substance under suction (i.e., piping that operates at less than atmospheric pressure), an owner and permittee must check the piping for the presence of air in the pipeline in accordance with the National Fire Protection Association standard NFPA, 329"Recommended Practices for Handling Releases of Flammable and Combustible Liquids and Gases" Chapter 5, Release Detection of Tanks and Piping, subsection 5-2.3.2(b), if any of the following indicator conditions are observed by any person dispensing a regulated substance:
(5) In addition to the requirements of section (4) of this rule, an owner and permittee of suction piping must conduct a line tightness test at least once every three years in accordance with manufacturers requirements.
(6) Release detection is not required for suction piping that is designed and constructed to meet the following standards:
(7) In lieu of conducting line tightness tests on either pressurized or suction piping, an owner and permittee may conduct monthly monitoring by one of the applicable release detection methods described in OAR 340-150-0450 through 340-150-0470, if the method is designed to detect a release from any portion of the underground piping that routinely contains a regulated substance.
(8) An owner and permittee must retain at a minimum the last completed line test, line leak detector test or the most current 12 consecutive months of release detection records for piping.
(9) An owner and permittee must report to the department any leak test results or other observations or results indicating the possibility of a release within 24 hours as a suspected release (OAR 340-150-0500 ) and immediately begin investigation in accordance with 340-150-0510.
Publications: Publications referenced are available from the agency.
Stat. Auth.: ORS 466.706 - 466.835, 466.994 & 466.995
Stats. Implemented: ORS 466.746 & 466.765