. >> consider the case of roberta walker. >> hi. >> in the movie version, she was y had been devastated's just got to be different than what's in our water because ours is okay. the guys from pg&e told me. they sat right in the kitchen and told me it was fine. >> i know. >> as part of the settlement, pg&e bought her house and its contaminated well. with the money, she built a new house. four miles down the road. outside of the original contamination zone. >> i built a house. got my dream house. >> but late last year, a cruel twist. according to the water board, the so-called plume of contaminated groundwater was spreading. >> the plume had moved, it was heading my direction, and i couldn't believe it. >> this is the sort of the outline of the plume as it's been described. >> this is des bell, the pg&e executive in charge of the cleanup in hinkley. we sat down with him last week. so do you believe pg&e's actions have caused health problems for people in hinkley? >> no one in hinkley is drinking water that doesn't meet the state water quality standard, but we certainly have an environment