Using one arm? Yes and one hand with five naturally flowing movements needed to complete the emptying action. 1) Lift off the waste water tank while having the machine in its locked upright position. (With machine's handle in its locked, upright position, the waste water tank requires the pressing down of the red tab by pinching the tab and the carrying indentation below the red tab using the thumb and 4 fingers). 2) moving the container by fingers inserted in the lift bar of the indented area below the red tab. 3) setting the container in a sink (or on a flat surface next to a water receptacle) and opening the c-clamp of the container which secures its top to the tank of dirty water within. 4) lifting off the container's lid and placing it nearby. 5) tilting the waste water tank to empty it after having separated its lid from the container. After emptying, the tank should be 6) rinsed and the filter screen cleared of any debris by letting clean water run into the container, 7) replacing the top and attaching the c-clamp, 8) lifting the tank again using the indented finger-grip area that is below the red tab, and placing it into the upright, locked machine by first placing the bottom of the container in front of the red accessory door (where the accessory hose is attached) and with the bottom of the tank at a 30- to 45-degree angle with the upright machine and lifting upwards on the now emptied tank, once again pinching the red tab downwards as the tank is lifted upwards to where it is secured,