The Georgia-based peanut butter producer linked to a nationwide salmonella outbreak has been repeatedly cited for violating sanitation and cleanliness standards, the New York Times reports. According to reports from 2006, 2007 and 2008, the Peanut Corporation of America-owned plant failed to properly sanitize food-contact surfaces and failed to make sure that equipment was cleanable and properly designed. The salmonella outbreak has been blamed for at least 500 illnesses and seven deaths.