Wash. Rev. Code § 72.64.070
The department shall determine which prisoners shall be eligible for employment under RCW 72.64.060, and shall establish and modify lists of prisoners eligible for such employment, upon the requisition of an agency mentioned in RCW 72.64.060. The secretary may send to the place, and at the time designated, the number of prisoners requisitioned, or such number thereof as have been determined to be eligible for such employment and are available. No prisoner shall be eligible or shall be released for such employment until his or her eligibility therefor has been determined by the department.
The secretary may return to prison any prisoner transferred to camp pursuant to this section, when the need for such prisoner's labor has ceased or when the prisoner is guilty of any violation of the rules and regulations of the prison or camp.
RCW 72.64.070