Negotiations with SEIU representatives began Sunday morning in Oakland.
BART tells ABC7 News the two sides discussed supplemental issues and talks are planned for Monday with both unions involved to discuss the major issues.
On Saturday, representatives from the Amalgamated Transit Union met with BART officials at the Caltrans building in Oakland. One of the reps told ABC7 News there's nothing new to report.
The transit agency says the two sides remain $112 million apart.
Transportation officials are already planning ahead in case there is a strike. They released a $21 million strike plan this week. It includes free charter buses, extra carpool lanes, and limited transbay train service run by BART managers.
The 60-day cooling off period ends on Oct. 11, which is the earliest a strike could happen.