Abstract: In a scraper, or the like, having as its purpose the cutting of a level swath in an earthen terrain, and receiving the earth cut from the terrain, in which the cutting blade is mounted, in a level attitude, to a scraper frame, which frame is itself mounted on wheels for movement along the terrain, means for adjusting the wheels relative to the frame so as to maintain the level attitude of the blade over uneven terrain, or under conditions of uneven loading of the earth removed from the swath.

Abstract: A portable vessel for containment of environmentally sensitive materials during transportation thereof, and during discharge thereof, comprising a sealable vessel having capability of holding a negative pressure, and including a filter system for drawing out gasses contained in said vessel, and a dual auger vessel discharge system to remove the material from the vessel without the necessity of human contact therewith.