Decanting

If you have received the polymer resin in drums, and you have a forklift onsite, your crew can transfer polymer to the water trailer with the aid of the proper standard pipe fitting and some rubber drain hose secured by a hose clamp.  Have the water in the trailer already, so polymer resin will disperse more readily.  Stir.

Be sure to use a pallet or cradle and DO NOT lift the drum directly with the forks, as it can destroy the drum. Strap the drum to the pallet as shown. 

If you have received the polymer resin in drums, and you do not have a forklift onsite, your crew can transfer polymer to the water trailer with the aid of 5-gal pails and the following process, which goes pretty well once you set it up.

Full instructions (PDF)