Closed-loop containment ash washer assembly and method

A closed-loop containment washer assembly for use with a pressure washer apparatus for washing an object containing a medium weight contaminant comprising:

• a support surface configured to support the object to be washed;
• a first collection basin configured and oriented to collect a portion of the run-off of a washing fluid after being flowed over the object to remove the medium weight contaminant;
• a second collection basin configured and oriented to collect substantially the remaining portion of the run-off of said washing fluid after being flowed over the object to remove the medium weight contaminant;
• a first filter assembly having an inlet side in fluid communication with the contaminated washing fluid collected in said first collection basin, and an outlet side for outlet flow of respective filtered washing fluid thereof;
• a second filter assembly having an inlet side in fluid communication with the contaminated washing fluid collected in said second collection basin, and an outlet side for outlet flow of respective filtered washing fluid thereof;
• and
• a clean wash fluid basin;
• wherein a minority portion of the respective outlet flow from the first filter assembly is diverted into said clean wash fluid basin, and a majority portion of the respective outlet flow is diverted into said first collection basin in an agitating, turbulent manner to cause the collected medium weight contaminants contained therein to be or remain suspended in the collected washing fluid to promote passage into the respective inlet side of the first filter assembly;
• and
• wherein a minority portion of the respective outlet flow from the second filter assembly is diverted into said clean wash fluid basin, and a majority portion of the respective outlet flow is diverted into said second collection basin in an agitating, turbulent manner to cause the collected medium weight contaminants contained therein to be or remain suspended in the collected washing fluid to promote passage into the respective inlet side of the second filter assembly.