An owner and permittee may use a release
detection method for an UST or underground piping not otherwise specified in
(a) The device is able to detect a 0.2
gallon per hour leak rate with a probability of detection of at least 95
percent and a probability of false alarm of no more than 5 percent for all
portions of the UST or underground piping that routinely contains a regulated
(b) The method is an
approved leak detection method or equipment as listed by a national
organization (e.g., the National Work Group on Leak Detection).
(2) An owner and permittee must
monitor the UST and underground suction piping for a release at least every 30
days and record the results for each month.
(3) An owner and permittee must monitor
pressurized underground piping for a release daily and record the results daily
for each month.
An owner and
Report to the department
any release detection test results indicating the possibility of a release
(i.e., test failure or alarm) within 24 hours as a suspected release (OAR
) and immediately begin investigation in accordance with
(b) Immediately investigate all
larger-than-normal or reoccurring variations in monitoring results and, if the
variation cannot be accounted for, report such variations to the department as
a suspected release without waiting to obtain a second confirmation of
(5) An owner and
permittee must retain at a minimum the most current 12 consecutive months of
release detection records.
Or. Admin. R.
DEQ 6-2003, f. & cert.
ef. 2-14-03; DEQ 3-2008, f. 2-29-08, cert. ef.
Stat. Auth.: ORS 466.706 - 466.835, 466.994 &
Stats. Implemented: ORS 466.746 &