The unmentionable odor that wafts from Ocean Park from time to time is being confronted by the town of Oak Bluffs. Whatever it is that is seeping to the surface, the state Department of Environmental Protection is not amused. Recently, wastewater commission chairman Hans von Steiger was quoted in the Gazette as saying, “Remember we are dealing with below-ground here. We can guess, but we don’t know what’s down there.”