RCW 70A.15.3570: Residential solid fuel burning devices—Opacity levels—Enforcement and public education.

(1) The department shall establish, by rule under chapter 34.05 RCW, (a) a statewide opacity level of twenty percent for residential solid fuel burning devices for the purpose of enforcement on a complaint basis and (b) a statewide opacity of ten percent for purposes of public education.

(2) Notwithstanding any other provision of this chapter which may allow an authority to adopt a more stringent opacity level, no authority shall adopt or enforce an opacity level for solid fuel burning devices other than established in this section.

(3) Actions of the department and local air pollution control authorities under this section shall preempt actions of other state agencies and local governments for the purposes of controlling air pollution from solid fuel burning devices, except where authorized by chapter 199, Laws of 1991.