1. (a) All new or replacement underground pressurized piping must be installed as follows:

   1. (1) Nonmetallic;
   2. (2) Double-walled;
   3. (3) A tracer locator wire must be installed in all piping trenches; and
   4. (4) Tank, dispenser, and transition sumps must be installed and monitored per 165:25-3-6.29.

2. (b) All new or replacement suction product piping must meet the requirements of 165:25-3-6.29 as follows:

   1. (1) Nonmetallic;
   2. (2) Double-walled;
   3. (3) A tracer locator wire must be installed in all piping trenches; and
   4. (4) Tank, dispenser, and transition sumps must be installed and monitored per 165:25-3-6.29.
3. (c) Existing facilities that are replacing the lesser of twenty feet (20') or fifty percent (50%) of underground piping must upgrade pursuant to (a) or (b) of this Section. If a metallic line fails due to structural failure or corrosion, all metallic product lines at the facility must be immediately removed, and cannot be repaired.
4. (d) Existing facilities that are making any alteration to a fuel island when concrete removal is required must install dispenser sumps and monitor as pursuant 165:25-3-6.29. Repairs to the island that in no way change the island from its original design is not considered making alterations.
5. (e) Existing facilities that are installing new dispensers must install under dispenser containment (UDC) sumps and monitor as pursuant to 165:25-3-6.29. Dispensers will be considered new when both the dispenser and equipment needed to connect the dispenser to a UST system is installed. Check valves, shear valves, unburied risers or flexible connectors and other transitional components are considered equipment that connects a dispenser to a UST system.
6. (f) Existing facilities that are replacing underground storage tanks or making repairs at a submersible pump that require excavation of dirt or concrete removal must install tank sumps and they must be monitored pursuant 165:25-3-6.29.
7. (g) Existing facilities that are replacing underground storage tanks must replace all single walled piping per (a) or (b) of this section.
8. (h) Piping installed as a siphon or to manifold tanks may be single wall non-metallic pipe.
9. (i) Ball valves must be installed on new safe suction lines to isolate lines for testing purposes.

Amended and renumbered from 165:25-2-54 at 23 Ok Reg 2261, eff 7-1-06

Amended at 26 Ok Reg 1826, eff 7-1-09

Amended at 31 Ok Reg 1007, eff 9-12-14

Amended at 32 Ok Reg 780, eff 8-27-15

Amended at 34 Ok Reg 935, eff 9-11-17

Amended at 36 Ok Reg 551, eff 8-1-19

Amended at 39 Ok Reg 955, eff 10-1-22