Wash. Rev. Code § 81.108.100
(1) A low-level waste disposal site operator is exempt as specified in RCW 81.108.030(2)(a), 81.108.040(6), 81.108.050(7), 81.108.060(3), and 81.108.070(3) unless a monopoly situation exists with respect to the site operated by such site operator. A monopoly situation exists if either of the following is present:
(b) Disposal rates at other sites are not reasonable alternatives for Northwest compact generators, considering: Disposal rates at other facilities; current disposal rates charged by the site operator; historic relationships between the site operator's rates and rates at other facilities; and changes in the operator's rates considering changes in waste volumes, taxes, and fees. A monopoly situation does not exist if either of the following facilities operates or is projected to operate after December 31, 1992:
[ 1991 c 272 s 11.]