53.2. The provisions of this division do not apply to gaseous substances, except those contained in another residual material or produced by the treatment of such a material, mine tailings, or soils containing contaminants in quantities or concentrations exceeding those fixed by regulation under paragraph 1 of section 31.69.
1999, c. 75, s. 13; 2002, c. 11, s. 3; 2011, c. 14, s. 2.