Details for U.S. Environmental Protection Agency - Ad from 2021-11-20

The U.S. Environmental Protection Agency, Region 8 Announces the Fourth Five-Year Review for the Gilt Edge Mine Superfund Site in Lawrence County, South Dakota The U.S. Environmental Protection Agency (EPA) is conducting the fourth Five-Year Review of the Gilt Edge Mine Superfund site (Site) in Lawrence County, South Dakota. Five-Year Reviews provide an opportunity to evaluate the implementation and performance of a remedy to determine whether it remains protective of human health and the environment. The fourth Five-Year Review will be completed in 2022. The Site is in a rural area of the Black Hills, about 6 miles southsoutheast of the towns of Lead and Deadwood. The Site consists of remnants from past mining activities. Mining activities and wastes contaminated the area with heavy metals and acidic water. The EPA added the Site to the Superfund program’s National Priorities List (NPL) in 2000. To manage the cleanup, the EPA divided the Site into three operable units (OUs). OU1 addresses surface contamination. The long-term remedy, selected in 2008 and modified in 2014, includes the removal, consolidation and containment of contaminant sources. Construction on OU1 began in 2017 and will be conducted in phases as federal funding is obtained. OU2 addresses management and treatment of the acid rock drainage that threatens surface water in the area. Water treatment and water quality monitoring are ongoing. After finishing the OU1 remedy, the EPA will evaluate the resulting new site conditions and develop a final cleanup plan for OU2. Agnico Eagle Mines, LLC, a Bonafide Perspective Lessee at the Site, has performed investigation work that provided additional characterization information for OU2. OU3 addresses the Ruby Waste Rock Repository. The interim remedy included construction of a cap, vegetative cover, and drainage structures. The final remedy for OU3 will be developed in the future. We want to hear from you! Community members are encouraged to share information that may be helpful in the Five-Year Review process. Community members who have questions or who would like to participate in a community interview, are asked to contact Ryan or Joy by January 15, 2022: Ryan Kloberdanz EPA Community Involvement Coordinator Phone: 303-312-6078 Email: kloberdanz.ryan@epa.gov Joy Jenkins EPA Remedial Project Manager Phone: 303-312-6873 Email: jenkins.joy@epa.gov The most current site information is available online, at: www.epa.gov/superfund/gilt-edge.