Or. Admin. R. 340-150-0470 - Other Methods of Release Detection

(1) An owner and permittee may use a release detection method for an UST or underground piping not otherwise specified in OAR 340-150-0410 through 340-150-0465 if:

(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 substance;

(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.

(4) An owner and permittee must:

(a) 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 340-150-0500 ) and immediately begin investigation in accordance with 340-150-0510; and

(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 data.

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

Notes

Or. Admin. R. 340-150-0470

DEQ 6-2003, f. & cert. ef. 2-14-03; DEQ 3-2008, f. 2-29-08, cert. ef. 3-10-08

Stat. Auth.: ORS 466.706 - 466.835, 466.994 & 466.995

Stats. Implemented: ORS 466.746 & 466.765