Incidents That Define Process Safety: Page 58, Page 314

On page 58, in describing the catastrophic incident in Mexico City, Incidents that Define Process Safety states that the largest explosion was measured at .5 on the Richter Scale  by a seismometers that was 20 km away. Since publication, it has been pointed out that some references give 0.5 as the Richter scale value while others give 5.

On page 314, the date next to the title Exxon Valdez, Alaska is July 10, 1976. It should read March 24, 1989.