D.C. Mun. Regs. tit. 15, § 2310
2310.1 The Commission, its staff, or agents, shall investigate and ascertain, periodically, the quality and quantity of natural gas supplied to consumers in the District of Columbia.
2310.2 The Commission, its staff, or agents periodically shall investigate the methods employed by natural gas corporations under its jurisdiction in manufacturing, distributing, supplying, and transmitting gas for light, heat, or power.
2310.3 Upon presentation of appropriate credentials, the Commission's staff, or duly appointed agents, shall be authorized to enter upon, inspect and examine, at reasonable times and in a reasonable manner, the records and properties of persons to the extent such records and properties are relevant to determining compliance with the provisions of this chapter.
2310.4 Inspections shall be conducted pursuant to one of the following:
(a) Routine scheduling;
(b) A complaint received from a member of the public;
(c) Information obtained from a previous inspection;
(d) Pipeline accident or incident; or
(e) Whenever deemed appropriate by the Commission.
2310.5 An inspection shall include a thorough review of the operator's records concerning inspection, operation, maintenance, and emergency procedures.
2310.6 Field inspection shall include operational checks of corrosion control provisions, overpressure and regulating equipment, odorization, repaired leaks, emergency valves and any other components of the facility.
2310.7 The Commission's Office of Engineer shall create and maintain the records of such inspections for a period of five (5) years.
SOURCE: Final Rulemaking published at 33 DCR 6625, 6628 (October 24, 1986).