A map to pipeline safety - EDITORIAL, San Francisco Chronicle
THE CONCUSSION that boomed through downtown Walnut Creek in the early afternoon of Nov. 9, 2004, continues to reverberate through the construction industry. And well it should.
At 1:22 p.m., a backhoe operator struck a high-pressure petroleum pipeline, spewing a stream of gasoline that was ignited by the welding torch of a crew building a new East Bay Municipal Utility District water main. Within minutes, a 60-foot-high fireball had engulfed the site, five workmen were killed, four more were severely burned, nearby Las Lomas High School was threatened and homes burned.