EXHIBIT 99.1 PURCHASE AGREEMENT This Agreement is entered into as of April 30, 2002 by Stericycle, Inc., a Delaware corporation ("Stericycle"), and James H. Shepherd ("Jim"), James Michael Shepherd ("Mike") and Richard T. McElhannon ("Richard"),...Purchase Agreement • May 9th, 2002 • Stericycle Inc • Hazardous waste management • Illinois
