Chevron Corp.’s $1 billion proposal to modernize portions of its Richmond refinery would include safety upgrades to piping systems, allowing it to
Chevron Corp.'s $1 billion proposal to modernize portions of its Richmond refinery would include safety upgrades to piping systems, allowing it to process crude oil with higher sulfur content, but not increase the 257,000-barrel-per-day facility's maximum output or its air pollution, according to a draft environmental report the city released this week. (Laura A. Oda/Bay Area News Group Archives)