Colorado Department of Agriculture
- Regarding treatment or disposal of livestock carcasses during any all-hazards event (2011)
Colorado Department of Transportation
- Regarding use of petroleum contaminated soils for CDOT road construction (1993)
Colorado Department of Natural Resources
- Regarding solid waste issues at mine sites (1992)
Colorado Department of Natural Resources - Oil and Gas Conservation Commission
- Regarding the disposal of eligible wastes at commercial Class II injection wells (2000)
Colorado Department of Public Health and Environment - Water Quality Control Division -
- Regarding implementation of SB 181 amendments to the Colorado Water Quality Control Act (2008)
Colorado Department of Labor and Employment - Division of Oil and Public Safety
- Regarding releases from hazardous substance underground storage tank systems (2000)
US Environmental Protection Agency (EPA)
- Voluntary Cleanup and Redevelopment Act