340-150-0400 General Release Detection Requirements for Petroleum UST Systems (1) An owner and permittee of petroleum UST systems must provide a method of release detection that: (a) Can detect a release from any portion of the UST and the underground piping that routinely contains a regulated substance; (b) Is an approved leak detection method or equipment as listed by a national organization (e.g., the National Work Group on Leak Detection); (c) Is installed, calibrated, operated and maintained in accordance with the manufacturer's instructions and third party evaluation for the leak detection method, including routine maintenance and service checks for operability or running condition; (d) Is capable of detecting the leak rate or quantity specified for that method in OAR 340-150-0450 through 340-150-0470 or 340-150-0410 for piping, with a probability of detection of at least 95 percent and a probability of false alarm of no more than 5 percent. (2) Beginning on October 1, 2020, an owner and permittee must test the electronic and mechanical components of the release detection system on an annual basis in accordance with either the manufacturer’s instructions; a code of practice developed by a nationally recognized association or independent testing laboratory; or requirements determined by DEQ to be no less protective of human health and the environment than the two options listed above. The annual test must, at a minimum (as applicable to the UST facility): (a) Automatic tank gauge and other controllers: test alarm; verify system configuration; test battery backup; and (b) Probes and sensors: inspect for residual buildup; ensure floats move freely; ensure shaft is not damaged; ensure cables are free of kinks and breaks; test alarm operability and communication with controller. (3) An owner and permittee must select an appropriate primary release detection method for the UST system (OAR 340-150-0420 through 340-150-0470). More than one method may be in use at an UST facility, but only one can be the primary method. The primary method must be reported to DEQ when an UST is installed or during an inspection by DEQ. The primary release detection method may not be switched from month to month depending on which method passes daily or monthly monitoring requirements. The primary method of release detection may be changed to another method as necessary as part of a repair or modification. (4) When a release detection method indicates a release may have occurred, an owner and permittee must notify DEQ of a suspected release in accordance with OAR 340-150-0500. (5) An owner and permittee must maintain records demonstrating compliance with this rule and retain the following records for as long as the release detection equipment is in use: (a) All written performance claims pertaining to any release detection system used and the third party evaluation and approval; (b) The results of any sampling, equipment testing or monitoring; and (c) Written documentation of all calibration, maintenance and repair of release detection equipment permanently located on site, including any schedules of required calibration and maintenance provided by the release detection equipment manufacturer. (6) An owner and permittee must keep release detection records either: (a) At the UST facility and immediately available for inspection by DEQ; or (b) At a readily available alternative site and provide the records for inspection by DEQ upon request. (7) An owner and permittee may use the codes and standards listed in Appendix I of this division to comply with this rule. [Note: View a PDF of Appendix I by clicking on the “Tables” link below.] [ED. NOTE: To view attachments referenced in rule text, click here to view rule.] Statutory/Other Authority: ORS 466.706 - 466.835, 466.994 & 466.995 Statutes/Other Implemented: ORS 466.746 & 466.765 History: DEQ 188-2018, amend filed 05/14/2018, effective 06/01/2018 DEQ 6-2003, f. & cert. ef. 2-14-03