The maximum and minimum operating pressures of an underground storage facility shall be determined by an engineer or geologist in conjunction with the requirements specified in Rule 400-5-3-.01. The maximum allowable stabilized reservoir pressure (gauge) shall be no greater than seventy-five percent (75%) of the fracture pressure of the underground reservoir as determined by a step rate test or as calculated by a qualified engineer, by a method acceptable to the Board. The average storage reservoir pressure shall be no greater than ninety percent (90%) of the fracture pressure even for short periods of time.

Author: State Oil And Gas Board

Statutory Authority: Code of Ala. 1975, §§9-17-1 et seq.

History: New Rule: Filed April 11, 2000; effective May 16, 2000.