In January 2001 under a written agreement with 17 US states,[26] Aventis initiated a program called the StarLink Enhanced Stewardship (SES) program, under which StarLink corn, buffer corn, and any corn stored in grain elevators that had become mixed with StarLink, would be bought by Aventis and directed to animal feed and non-food industrial use (e.g. ethanol production); the program included free kits to test for StarLink, and covered costs of cleaning equipment, transport, and storage facilities, as well as increased transportation costs.[27]: 193–95 Aventis estimated the cost would be between $100 million to $1 billion.[28][29][30]