Patent ID: 8080111

Claim:
A method of washing a piece of construction equipment comprising the steps of: washing a portion of the piece of construction equipment with water; collecting waste materials washed from the construction equipment in a bin; allowing liquid collected in the bin to drain into a receptacle having a sloped bottom for conveying the liquid to a sump; filtering particulate matter from the liquid pumped from the sump to recover clean water, comprising: pumping the liquid from the sump to a first settlement tank and on to a second settlement tank though a fluid path, the fluid path including an upwardly extending baffle providing a partial wall between the first and second settlement tanks and a downwardly extending baffle spaced from the upwardly extending baffle and extending into the second settlement tank such that liquid cascades over the upwardly extending baffle and downwardly through a space between the upwardly extending baffle and the downwardly extending baffle such that the particulate matter is left behind in the first and second settlement tanks; and storing the recovered clean water for recycling in a cleaning water tank.