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County staff warn Regulation 31 could force landfill gas controls after monitoring shows methane rates above state off‑ramp
Summary
County landfill staff reported an unofficial monitoring run showing an average methane generation rate of about 35.7%, above the 30% off‑ramp in Colorado's Regulation 31, making a future gas collection/control system likely and prompting calls to budget for design and monitoring over the three‑year implementation window.
Deb Viscus, a county landfill official, and Bentley Henderson, consultant, briefed the Garfield County Board of County Commissioners on Colorado's new Regulation 31 on methane from landfills and what it means for the county landfill.
Viscus said the adopted regulation includes an important three‑year planning window but warned that an off‑ramp in the rule applies only when methane generation rates are below 30 percent. "Even if you average them all together to get, an overall landfill, we're still at 35.7," she said, summarizing sampling from passive vents at the site.
Henderson reviewed the rulemaking history, tracing the requirement to state climate legislation and subsequent CDPHE rulemaking. He said stakeholders secured…
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