20.70.06.09

.09 Periodic Tests.

Each utility shall make periodic tests of meters and standards to assure their accuracy. These tests shall be scheduled within the calendar year, or earlier, when the interval is stated in years, or within the calendar month, or earlier, when the interval is stated in months. The basic periodic test interval may not be longer than provided for in the following schedule: (Note: Maintenance programs suggested by manufacturers of the following meters and devices should be carefully followed.)

A. Meters.

(1) 5/8 in. ----------------------------- 10 years

(2) 3/4 in. ------------------------------ 8 years

(3) 1-in. -------------------------------- 6 years

(4) 1-1/2 in. and 2-in. ------------------ 4 years

(5) 3-in. and 4-in. ---------------------- 2 years

(6) 6-in. and larger -------------------- 12 months

B. Working Standards.

(1) Volumetric tank ---------------------- 5 years

(2) Scales ------------------------------ 12 months