Hi Anthony,
In our enclosed trucks we have drain lines piped through the floor. We can drain our main and surge water tanks this way. One of our pumps has water lubricated packing (leaks all the time). We put a stainless pan under the pump to gather the water and have the pan piped right through the floor.
We rinse the floors in our trucks after doing really dirty places (coal mine). We just leave the doors open (we store the trucks inside) to air dry.
Before we installed the equipment we sealed the floors and walls.
Dave Olson
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Tidy Powerwash Service, Inc. P.O. Box 781, Catlin, Illinois 61817 Phone 217-427-5557, Fax 217-427-2632 We are a commercial cleaning contractor serving East-Central Illinois and West Central Indiana since 1984.
http://www.tps-inc.com/preswash.htm