Colorado

Under Colorado regulations, fly ash, bottom ash, slag, and flue gas emission control waste generated primarily from the combustion of coal or other fossil fuels are exempt from regulation as a hazardous waste. Reuse of CCBs is not specifically authorized under Colorado law, however, fly ash may be blended with portland cement for grouting wells.

Contact Information:
Glenn Mallory
Colorado Department of Public Health and Environment
4300 Cherry Creek Drive South, Denver, CO 80246-1530
Phone:  (303) 692-3099
Email: glenn.mallory@state.co.us
Website: www.state.co.us

Detailed Review of CCB Regulations:
Under Colorado regulations, fly ash, bottom ash, slag and flue gas emission control waste generated primarily from the combustion of coal or other fossil fuels are exempt from regulation as hazardous waste. 6 COLO. CODE REGS. §1007-3.261.4(b)(4). The use of CCPs may be regulated as solid waste under Colorado statutes and regulations, 30-20-100.5 et seq., 6 COLO. CODE REGS. 1007-2-1.2(c).

Currently, reuse of CCPs is not specifically authorized under Colorado law or regulations, however, fly ash may be blended with portland cement for grouting wells. 2 COLO. CODE REGS. §402-2. Rule 23.