Wash. Rev. Code § 79.150.030
(2) The department may authorize the sale of forest biomass in a contract for the sale of valuable materials under chapter 79.15 RCW provided that the department complies with the provisions of this chapter and:
(3) The department may:
(6) At the expiration of the contract term, the department may renew the contract for up to three additional five year periods on terms and conditions acceptable to the department, if the department finds:
[ 2010 c 126 s 3.]