Q. James owned real estate. He leased the building to two tenants. An insurance agent leased the first floor and a law industry leased the second floor. James sold the land to Mary, who used the entire building for her trade. She discovered which there were underground storage tanks buried in the land. She had to remove the tanks and then sued James and the former tenants for the cost of removing the tanks, even though none of them knew the tanks had been there.