Usn Naval Research Lab Ches Bay Detach is a superfund site located at Md Rd 261, Chesapeake Beach, MD 20732. The Environmental Protection Agency (EPA) identifies sites such as Usn Naval Research Lab Ches Bay Detach because they pose or had once posed a potential risk to human health and/or the environment due to contamination by one or more hazardous wastes. Usn Naval Research Lab Ches Bay Detach is currently registered as an Active superfund site by the EPA. However, it is not on the NPL (National Priorities List), which means the EPA does not consider it one of the nation's most hazardous waste sites.