The federal and Massachusetts governments reached a $7.7 million settlement with Textron Systems Corp. to clean up the area around the Massachusetts Military Reservation (MMR) on Cape Cod. For three decades, Textron used portions of the MMR to test munitions, which is believed to have tainted the soil with perchlorate and other substances and contaminated the groundwater. Textron will pay $1.3 million to the state and federal natural resource trustees, $5.6 million to the Army, and $800,000 to the Environmental Protection Agency. Textron will also remove contaminated soil, structures and debris from the area.