LA CROSSE, Wis. (WKBT) -

A natural gas leak scare in La Crosse Friday turned out to be a harmless gas.

A contractor working with Xcel Energy to clean up contaminated soil at the Oktoberfest Grounds hit an old Mercaptan Tank at about 10 a.m.

Mercapatan is a harmless gas that smells like sulfur or rotten eggs and is usually is added to odorless natural gas so people can smell it.

Reports of the odor went as far north as Menard's in La Crosse.