Abstract: A contaminant mitigation system for a lift includes a set of vertical panels configured to be attached to a platform and guardrails of the lift to form a bottom enclosure and a set of vertical walls is arranged to slidingly correspond with the set of vertical panels. In this way, the set of vertical panels and the set of vertical walls cooperate to form a vertically-extendable enclosure. A controller is configured to extend and/or retract the vertically-extendable enclosure to engage a ceiling when the lift platform is positioned at the ceiling. An evacuator of the system is configured to maintain a negative pressure within the vertically-extendable enclosure when engaged with a ceiling.