Karkar General Signal is a superfund site located at 1920-2190 Army St., San Francisco, CA 94124. The Environmental Protection Agency (EPA) identifies sites such as Karkar General Signal 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. Karkar General Signal is currently registered as an Archived superfund site by the EPA and does not require any clean up action or further investigation at this time.