It is the intent that the proceeds of the solid waste disposal tax imposed by Article 5G of Chapter 105 of the N.C. Gen. Stat. credited to the Inactive Hazardous Sites Cleanup Fund pursuant to N.C. Gen. Stat. § 105-187.63(1) shall be used by the Department of Environmental Quality to fund the assessment and remediation of pre-1983 landfills, except up to nineteen percent (19%) of the funds credited under this subdivision may be used to fund administrative expenses related to hazardous and solid waste management. (2007-550, s. 14(b); 2009-451, s. 13.3E; 2010-31, s. 13.9(a); 2014-100, s. 14.24(a); 2015-241, s. 14.30(u).)