(1) A generator operating at an electric generating project with an installed generator capacity of at least seven hundred fifty kilowatts but not exceeding one thousand kilowatts, that is in operation on June 7, 2012, and began operating after 2008, and that is located on agricultural lands of long-term commercial significance pursuant to chapter 36.70A RCW, is granted an extended compliance period for permit provisions related to the emissions limit for sulfur established by the department or a local air authority until December 31, 2016, if it is fueled by biogas that is produced by an anaerobic digester that qualifies for the solid waste permitting exemption specified in RCW 70A.205.290.

(2) A generator that meets the requirements in subsection (1) of this section may not be located in a federally designated nonattainment or maintenance area.

(3) Upon request, the department or a local air authority must provide technical assistance to a generator meeting the requirements in subsection (1) of this section to assist the generator in reducing its emissions in order to meet the requirements in this chapter.

(4) The definitions in this subsection apply throughout this section unless the context clearly requires otherwise.

(a) "Anaerobic digester" means a vessel that processes organic material into biogas and digestate using microorganisms in a decomposition process within a closed, oxygen-free container.

(b) "Generator" means an internal combustion engine that converts biogas into electricity, and includes any backup combustion device to burn biogas when an engine is idled for maintenance.