>> hello, my name is marilyn waterman and i'm a group of concerned neighbors in bruenel heights, regarding assessing the safety of a building around major gas transmission pipelines in san francisco. so i want to thank you for providing this forum. if we learn anything from this explosion, it's that these accidents are serious, they are potentially catastrophic and they need to be prevented via a high degree of caution and rigorous safety measures. these types of hearings are most welcome by our neighborhood and we look forward to your findings and thank you for uridyl jens. -- your diligence. those are my prepared remarks. i have a couple comments, i'm quite impressed by the response of the responders. it sounds like the emergency response at the bottom of the cliff was very well-orchestrated. i continue to be alarmed by what constitutes safety in the eyes of pg&e. and i think some of that was heard tonight. and i think within this culture of safety, i mean, pg&e could look at something and say look, we've got it covered. this is absolutely fine. but when we have pipeline safety experts l