30 Tex. Admin. Code § 334.488
Authorization for Class C and Class D facilities is issued by the agency when the leaking petroleum storage tank (LPST) site is subject to a corrective action plan involving storage and treatment activities pursuant to § 334.81 of this title (relating to Corrective Action Plan). Agency approval of the corrective action plan for the storage or treatment activities shall constitute authorization for the Class C or Class D facility. A Class C or Class D storage or treatment facility shall remain in operation only as long as is necessary to store or treat the soil from that one LPST site and it shall not accept soil from any other site at any time. The underground or aboveground storage tank owner or operator shall ensure that the approved storage and treatment activities comply with the following applicable provisions: §§334.482, 334.483, 334.490, 334.494, 334.496 - 334.503, and 334.505 - 334.507 of this title (relating to General Prohibitions; Disposal by Generator; Notification and Mobilization Requirements for Class B Facilities; Closure and Facility Expansion; Shipping Procedures Applicable to Generators of Petroleum-Substance Waste; Recordkeeping and Reporting Procedures Applicable to Generators; Shipping Requirements Applicable to Transporters of Petroleum-Substance Waste; Shipping Requirements Applicable to Owners or Operators of Storage, Treatment, or Disposal Facilities; Recordkeeping Requirements Applicable to Owners or Operators of Storage, Treatment, or Disposal Facilities; Additional Reports; Design and Operating Requirements of Stockpiles and Land Surface Treatment Units; Reuse of Petroleum-Substance Waste; Security; Contingency Plan; and Emergency Procedures).
30 Tex. Admin. Code § 334.488