(a) An owner or operator subject to the requirements of §264.1057 may elect to have all valves within a hazardous waste management unit comply with an alternative standard that allows no greater than 2 percent of the valves to leak.

(b) The following requirements shall be met if an owner or operator decides to comply with the alternative standard of allowing 2 percent of valves to leak:

(1) A performance test as specified in paragraph (c) of this section shall be conducted initially upon designation, annually, and at other times requested by the Regional Administrator.

(2) If a valve leak is detected, it shall be repaired in accordance with §264.1057(d) and (e).

(c) Performance tests shall be conducted in the following manner:

(1) All valves subject to the requirements in §264.1057 within the hazardous waste management unit shall be monitored within 1 week by the methods specified in §264.1063(b).

(2) If an instrument reading of 10,000 ppm or greater is measured, a leak is detected.

(3) The leak percentage shall be determined by dividing the number of valves subject to the requirements in §264.1057 for which leaks are detected by the total number of valves subject to the requirements in §264.1057 within the hazardous waste management unit.

[55 FR 25501, June 21, 1990, as amended at 71 FR 16907, Apr. 4, 2006]