Storage apparatus having tank with tapered bottom and axle assembly

A portable tank assembly that is movable between an operating position and a transport position, the portable tank assembly comprising:

• a tank assembly that includes a holding tank having an upper section that includes an upper wall and a lower section that includes a lower wall that tapers inwardly from the upper wall to form an orifice, wherein the holding tank defines a center axis,
• a transport assembly that includes a base portion and an axle assembly, wherein the base portion is affixed to the upper section of the holding tank, wherein the base portion includes at least first and second base portion rail members that extend generally parallel to the center axis of the holding tank, wherein the axle assembly includes a frame that rotationally supports an axle that includes wheels on opposite ends thereof for transporting the holding tank along a surface, and wherein the axle assembly includes at least first and second axle assembly rail members that extend generally parallel to the center axis of the holding tank, wherein the transport assembly includes first and second seat members each having first and second opposite ends, wherein the first end of the first seat member is directly connected to the first base portion rail member and the second end of the first seat member is directly connected to the first axle assembly rail member, wherein the first end of the second seat member is directly connected to the second base portion rail member and the second end of the second seat member is directly connected to the second axle assembly rail member, and wherein in both the transport position and the operation position, at least a portion of the lower section of the holding tank is seated on the first and second seat members, and
• a skid assembly that includes a skid plate configured to rest on a horizontal surface when the portable tank assembly is in the operating position and a plurality of legs connecting the skid plate to the holding tank.