The department said the sediment would only consist of wet or dry dirt or mud without rocks, debris or vegetation, and inspectors would refuse any truckload containing unpermitted materials.
The number of missing has fluctuated but stands at seven.
Evacuation orders and warning have been listed for many residents in Santa Barbara County.
The dead were identified - all from Montecito, ranging in age from 3 to 89 years old.
"In disaster circumstances, there have been many miraculous stories of people lasting many days".
Yesterday, 87-year-old Joseph Bleckel was found dead in his Montecito home, Santa Barbara County Sheriff Bill Brown said.
"My sister was such a good person, she only thought of others to the point that she would cry with you when you were hurt or sick", said Ramos' sister, Jennifer Ramos.
The cause of death for most of the victims will be listed as multiple traumatic injuries resulting from flash floods with mudslides, the Santa Barbara Sheriff's office said Thursday.
"It is not a safe or convenient place to be right now", he said.
He said the zone, which includes areas formerly under voluntary evacuation advisories, would be in effect for one week but that residents should plan for two.
Downed power lines wrapped around trees at one property, while elsewhere the lines dropped nearly to the ground. He and his parents put belongings in three cars in case they made a decision to leave before the storm.
The fires burned most vegetation, leaving ideal conditions for the latest disaster to unfold. "... We didn't take it serious (ly) enough".
Brown said a 19th victim had been found and named her as Morgan Corey, 25.
"Where do you go when you're a family of four and you don't have a second house?"
"We've got a window that's closing, but we're still very optimistic".
The storm hit hard between 3 and 6 a.m. Tuesday.
The Thomas Fire - the largest wildfire in California's recorded history - burned more than 281,000 acres in Santa Barbara and Ventura counties from early December into this month.
The, was declared fully contained Friday.
Geologists and forecasters warned that intense rain could trigger deadly mudslides from the scorched areas.
"We have a yard to redo and hopefully our insurance will help out with that, but the people across from me, newer homes, gone", said Garrett Speirs, a 54-year-old artist who has been living in Montecito for 20 years.
"(But) no storm brings down everything that is susceptible.
Before the news conference had ended, Brown returned to the microphone, and with a happy tone said a phone call had just come in about Keating.
What can be done? With most utilities out of commission or about to be cut off, staying behind was not an option for many.