The department may grant exemptions in writing from any of the requirements of chs. NR 500 to 538 for municipal solid waste combustors and any other solid waste facilities which manage the residue from municipal solid waste combustors. The department also may issue an approval for solid waste which has been processed into a fuel for a municipal solid waste combustor which exempts the combustor and any facility which manages the combustor residue from regulation under chs. NR 500 to 538. Such exemptions may be granted under this section. The department shall consider the following criteria in determining whether an exemption shall be granted under this section:
Wis. Admin. Code Department of Natural Resources NR 500.10