30 Tex. Admin. Code § 331.162
The operator and permittee shall assure for construction, operation, maintenance, monitoring, closure, and post-closure of a Class I salt cavern disposal well and associated cavern, the continuous attainment of a performance standard of no escape of waste from the salt cavern injection zone. The provisions of this chapter, as well as any permit or order issued by the commission, shall be construed as minimum operating requirements. To qualify for a permit or to otherwise operate a Class I salt cavern disposal well and associated cavern, permit applicants and facility operators must demonstrate that this performance standard will be satisfied even if it is necessary to go beyond the minimum operating requirements described in this chapter.
30 Tex. Admin. Code § 331.162