In the tragic 1989 accident of the Exxon ship Valdez that dumped 240,000 barrels of oil into Prince William Sound, the National Safety Board determined that blood tests of Capt. Joseph Hazelwood showed a blood-alcohol content of 0.06%. 1 This testing did not take place until nine hours after the accident. Blood alcohol is eliminated from the system at a rate of about 0.015 percentage points per hour. If the permissible level of alcohol is 0.10%, should the Board determine that the captain could be liable? (We assume that he did not have a drink after the accident.)