Michigan county adds wells to closed landfill

The wells will divert methane to flares on-site.

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September 12, 2017
Waste Today Staff
Landfills Legislation and regulations
Crews have recently began drilling additional methane wells at closed Kentwood Landfill in Kentwood, Michigan, to mitigate emissions at the site, a report by mlive.com says. The decision to add the wells came after methane was detected migrating outside the perimeter of the facility last year.

Six wells will be drilled in the portion of the landfill near Kentwood public works complex, while another 12 will be drilled in the northwest corner of the site near the Kentwood Justice Center and Kent District Library’s Kentwood branch, the report says. The holes will be drilled in pairs—one around 20 feet deep and the other around 90 feet deep—which will draw the gas from both deep and shallow underground areas. Seven gas monitoring probes will also be added.

The new wells, along with the nine that already exist, will divert the methane to two flares—one that already exists near the Kentwood library and another that will be installed next to it in fall 2017.

Originally, installation of the wells and probes was set to begin in March but Kent County was seeking input and approval from the Michigan Department of Environmental Quality (DEQ) and the U.S. Environmental Protection Agency (EPA), which took longer than expected. Another contributor to the delay was figuring out the best process to capture the methane, issuing and accepting bids and seeking approval from the board of public works.

Kentwood Landfill opened in the 1940s and was closed in 1976. It is considered one of the 65 Superfund sites in Michigan and is now managed by the Kent County Department of Public Works and is monitored by the EPA and DEQ.