These regulations apply to solid wastes as that term is defined in WAC 173-304-100. These regulations shall not apply to the following solid wastes:

(1) Overburden from mining operations intended for return to the mine;

(2) Liquid wastes whose discharge or potential discharge is regulated under federal, state or local water pollution permits;

(3) Dangerous wastes as defined by chapter 70.105 RCW and chapter 173-303 WAC;

(4) Woodwaste used for ornamental, animal bedding, mulch and plant bedding, or roadbuilding purposes;

(5) Agricultural wastes, limited to manures and crop residues, returned to the soils at agronomic rates;

(6) Clean soils and clean dredge spoils as defined in WAC 173-304-100 or as otherwise regulated by section 404 of the Federal Clean Water Act (PL 95-217);

(7) Septage taken to a sewage treatment plant permitted under chapter 90.48 RCW;

(8) Radioactive wastes, defined by chapters 402-12 and 402-19 WAC; and

(9) Wood debris resulting from the harvesting of timber and whose disposal is permitted under chapter 76.04 RCW, the State Forest Practices Act.