Mid-Columbia Fire and Rescue crews spent four hours on Monday doing mop-up work on a fire that ignited Sunday south of Columbia Gorge Community College and Sorosis Park.  MCFR Chief Bob Palmer says they wanted to further mop up before temperatures heated up again.  The fire was reported Sunday morning at about 11:30, burning in grass, brush, and scrub oak.  Palmer says the fire burned six-point-two acres, with crews from Mid-Columbia Fire and Rescue, Dallesport, U.S. Forest Service, and the Oregon Department of Forestry involved in the effort.  Palmer noted a lack of road access complicated the firefighting work.  Cause of the fire is unknown.