Place the safety cones from the kit around the storm drain, especially while you're placing the kit, to warn motorists to give you room.
Carefully pull up the grate to the drain and place the tub from the kit in the opening.
Use sandbags as necessary to divert the car-wash runoff into the storm drain where you placed the basin, to avoid the water going to another drain down the street.
Attach the hose from the kit to the pump and place that inside the tub.
Divert the exit end of the hose to a lawn, shrubs or trees. It can also be diverted to a sanitary sewer system through a toilet or sink. Fundraisers may be able to divert the water to grass and trees in a community park.