Subject 391-3-12 UNDERGROUND GAS STORAGE
The underground storage of gas shall be limited to geologic structures reasonably capable of confining the gas to the storage area and permitting it to be withdrawn.
No gas shall be injected except for test purposes into strata less than 500' beneath the surface. No storage field shall have less than 500' of cover.
All casing and equipment in the well and facilities connected to it up to and including the Christmas tree shall comply with the applicable standards of the A.P.I.
All field and gathering piping shall comply with the applicable provisions of the American Standards Code for Pressure Piping, American Standards Association, B-31.8.
The applicable recommended practices of the American Petroleum Institute in drilling, casing, cementing, well testing and the like shall be followed where practicable. When drilling into a structure suspected of holding gas, blow out preventers shall be used.
The development and operation of any underground aquifer gas storage facility shall be under the general supervision of a professional geologist or engineer.