Back to the resource library Noise Letter (T.Dahl) September 7, 2006 Download Letter to the Colorado Oil and Gas Conservation Commission, asking that they limit the night-time noise level to 45 decibels. See All Related Resources Earthworks 2023 Annual Report Comments on Texas’s implementation of EPA’s Emissions Guidelines, 40 CFR Part 60, Subpart OOOOc, for existing crude oil and natural gas facilities Comments to Colorado’s Energy and Carbon Management Commission on Produced Water Human Rights Violations, Abuses, and Incidents Registered During the Protests Against the Mining Contract in Panamá