SIMI VALLEY (CBSLA.com) — Once a cutting edge research and development center, the Santa Susana Field Laboratory in the hills above Simi Valley long ago became a contaminated, radioactive source of great concern.

But cleanup of the site by Boeing Co., under the supervision of the California Department of Toxic Substances Control (DTSC), has now become the target of a lawsuit by the Consumer Watchdog group, which alleges that radioactive debris from the site is being deposited into landfills and recycling facilities that are neither licensed nor equipped to handle such material.