The separation requirements of Section 8-4-3 do not apply to the following:
(a) Occupants of single family and two (2) to four (4) unit residences, multiple-family dwellings and non-residential facilities and properties that send their postconsumer waste to a processing facility licensed by the Wisconsin Department of Natural Resources that recovers the materials specified in Section 8-4-3 from solid waste in as pure a form as is technically feasible.
(b) Solid waste which is burned as a supplemental fuel at a facility if less than thirty percent (30%) of the heat input to the facility is derived from the solid waste burned as supplemental fuel.
(c) A recyclable material specified in Section 8-4-3 for which a variance has been granted by the Wisconsin Department of Natural Resources under Sec. 159.l 1(2m), Wis. Stats., or NR 544.14, Wis. Adm. Code.