cal fire today said the scu fire in santa lara, al meade that and contra costa counties contained by september 12th, the lnu fire should be contained by september 8th. containment for the czu fire burning in santa cruz and san mateo counties is not yet known. >>> meanwhile, in the wall bridge fire zone, work crews have a new tool for clearing out the unsafe burned trees. abc 7's wayne freedman watched this in action. he described it something like the terminator. >> reporter: even as the wallbridge fire still burns, they're cleaning up along mill creek road where sadly damaged trees must fall in order to make this area safe. traditionally downing trees means climbing them, banging away in buckets. it's intense and hazardous physical labor. so now something new, the toughest, meanest, most efficient tree felling machine. >> it beats manual labor every day of the week. >> reporter: marcus sperling works for atlas tree and landsca landscape. sonoma county hired that company to clear hundreds of hazardous trees and use these complex machines. the machines are new to this area. what would