Thanks. But I'm wondering if the info there is out of date about which BART train to take, given what a lookup on the BART scheduler says......
Looking at the BART schedule (and the fact that the Amtrak bus from Martinez to Santa Rosa leaves at 3:30pm) maybe it might make more sense to travel to the Oakland Colliseum station and get the Amtrak there. The BART planner at
www.bart.gov shows that as a single train ride on the Dublin-Pleasanton line where the SFO-Richmond BART requires two transfers for a total of three trains.