Based on the provided sources, core drilling immediately adjacent to an active or closing sanitary landfill—such as the site proposed for the Pocahontas County transfer station—presents several severe environmental and engineering hazards:
- Puncturing Existing Liners: There is a significant risk that the core drill could accidentally pierce the landfill's protective liners. Puncturing a liner compromises the facility's containment system, which could allow toxic leachate to escape into the surrounding soil and groundwater.
- Hitting Methane Pockets: Landfills generate explosive gases as waste decomposes. Core drilling near active or legacy cells carries the hazard of accidentally puncturing a trapped methane pocket.
- Interfering with Environmental Infrastructure: Drilling operations risk damaging or interfering with the strict groundwater monitoring systems and infrastructure mandated by the West Virginia Department of Environmental Protection (WV DEP).
- Encountering "Legacy Fill": Because the drilling is happening right next to the current landfill shop, engineers must be cautious of drilling into "legacy fill"—uncompacted trash or loose soil from decades-old landfill operations. If a heavy industrial facility, such as a transfer station with a massive concrete tipping floor, is built on this unstable fill, it is a recipe for structural collapse.
Due to these severe hazards, state environmental regulators like the WV DEP may require strict oversight during any core drilling operations near an active landfill to ensure these disasters are prevented.
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