If possible, do not locate the pad in an area where mixing and loading has been done in the past. Constructing a pad in such an area might seal soil that is contaminated. Locate pumps and piping aboveground and within the rinse-pad area. Construct the pad from watertight concrete. Make sure the pad is large enough to hold your largest application vehicle.
Sumps collect spills and rinse water, and they transfer liquid to aboveground tanks.
Make sure there is a level area for storage tanks at the back of the pad. 35E. Store the various rinsates of incompatible chemicals in separate containers. Label rinsate storage tanks carefully so you don't mix incompatible chemicals. Be sure rinsate tanks are small enough to encourage the rapid reuse of rinsate material. Mount rinsate tanks at least 3 to 5 inches above the concrete floor.