WAC 173-160-301
WAC 173-160-301. What are the requirements for temporary capping?
(1) All wells which are not in use, or are temporarily out of service, must be securely capped so that no contamination can enter the well.
(2) Capping must be affixed by solid welds or equal seal to prevent unauthorized access to the well.
(3) Temporary capping alone will not satisfy the decommissioning requirements of this chapter.