Abstract: A mounting device for securing a firearm to a support structure such as a motor vehicle includes: a base plate defining a generally planar mounting surface; a locking pin, a guide pin, and a plurality of mounting posts extending away from the mounting surface in orthogonal relation thereto. The mounting posts primarily support the firearm and are arranged on the base plate to receive the firearm in a direction orthogonal to the mounting surface and to retain the predetermined firearm against removal from the mounting surface in directions parallel thereto. A cover plate includes an opening through which the locking pin extends and a slot through which the guide pin extends for support of the cover plate in spaced, generally parallel and overlapping relation to the mounting surface.

Abstract: A reactor vessel for use in treating slurries containing minerals, soils or sludges contaminated with toxic organic substances is disclosed. The vessel includes a tank, having a sealed cover, a mixer arrangement, an air supply arrangement and an exhaust gas recycling system. The air supply arrangement includes one or more porous, flexible membrane diffusers adapted for introducing gas, in the form of fine bubbles, into a tank-contained slurry.

Abstract: A transportable apparatus for biological treatment of a slurry of contaminated materials, including a series of square reactor cells having substantially parabolic lower portions, set at the same elevation and communicating in series. Gas diffusers are placed in each cell for aerating and mixing the slurry, and an airlift slurry transport system is employed for recirculating the slurry. The apparatus also has applicability to the treatment of water and waste water.