Chevron spokesman Gareth Johnstone said an evacuation zone was being maintained as a precaution while work continued on the impacted pipelines. Meanwhile, the fire continued to shrink and a nearby pipeline was being depressurized and its residual liquefied natural gas flared, he said.
Jim Barnum, general manager of operations for the Chevron Pipeline Co., apologized Friday on behalf of the company.
"The No. 1 goal for all involved is the protection of life," he said.
The company is monitoring a nearby 14-inch LPG pipeline and was working to empty the line and depressurize it.
Barnum said tests have determined that the air quality in the area is "normal."