A multi-agency drill simulating a major oil spill off the coast of San Diego is scheduled to be held Wednesday and Thursday at the San Diego Convention Center. The two-day exercise will involve dozens of participating agencies from around the southern area. The drill is designed to test the response capabilities of the agencies and create a decision-making environment for participants. The joint-agency efforts will be monitored and evaluated in order to identify any areas in need of improvement. Some of the organizations involved are Chevron Corporation, Coast Guard Sector , U.S. Navy Region Southwest, San Diego County Office of Emergency Services and the California Department of Fish and Game's Office of Spill Prevention and Response.