(1) The minimum periodic test interval for gas meters, other than orifice meters, is as follows:
(a) Meters with capacity up to three thousand cubic feet per hour - Every ten years;
(b) Meters with capacity three thousand cubic feet per hour and over - Every five years.
(2) The minimum periodic test interval for orifice meters is as follows:
(a) Differential gauges - At least once each three months;
(b) Orifice plate - At least once each year.
(3) A meter sampling program may be implemented by the utility in lieu of the basic periodic test interval as provided for under WAC 480-90-343
, Statement of meter test procedures.
[Statutory Authority: RCW 80.01.040 and 80.04.160. 01-11-003 (Docket No. UG-990294, General Order No. R-484), § 480-90-348, filed 5/3/01, effective 6/3/01.]