Evidence of Buried Oil Tank

[Caitlyn Fitzgerald]

This photo was taken during the inspection and is said to be evidence of a possible buried oil tank. The owners say they have no knowledge of a buried tank (they've owned the house since 2009) and the town has no records of a tank. We know neither of these necessarily prove there is no tank, the house was built in 1966 so it is very possible. We would like to avoid paying $1000-$1500 especially since no one knows if there even is a tank! any pictures I've seen of lines coming through the foundation show two lines. this looks like a hose to me? Has anyone seen anything similar?