DEIONIZATION IS THE METHOD OF WATER TREATMENT FOR THE WIRE EDM INDUSTRY. IT IS IMPORTANT THAT THE PROPER MIX AND TYPE OF RESIN IS USED. IN ADDITION, EXHAUSTED RESIN MUST BE TREATED PROPERLY. THIS PAPER WILL HELP YOU CHOOSE THE CORRECT RESIN SYSTEM AND EDUCATE YOU ON THE FEDERAL REGULATIONS SET FOR HANDLING THE EXHAUSTED EDM RESIN.