Abstract: A portable containment (10) is illustrated for field use in containing pesticides and other toxic chemicals and the like. Containment (10) includes a floor (12) and integral side walls (16, 18, 20, 22). Resilient side braces (A), bracing straps (B), and compressible top braces (C), provide resiliency so that the upstanding walls deform to allow a wheeled vehicle or aircraft (13) to roll onto and off of the containment in the field. Elastic corners (D) allow the side walls and corners to be deformed outwardly or inwardly without tearing or damage of the corners or upstanding walls.