I believe there are some scenery items (cranes, etc.) in the Oakland Harbor that need to be deactivated. As you were flying out of Hayward, which is close by, these were probably loading. Do a search in the forums and I believe you will find some posts on this subject.
Jim
I think these are the culprit files. I cannot find the post, but I have all these bgl files deactivated in my Orbx NCA05 scenery folder:
FTX_NCA_objects_CA_Oakland.BGL.OFF
FTX_NCA_objects_SRA_marinas_ships_docks_PLC.BGL.OFF
FTX_NCA_objects_windfarms_CA_PLC.BGL.OFF
FTX_NCA_objects_windfarms_CA_PLC_addtl_animated.BGL.OFF
FTX_NCA_objects_windfarms_CA_PLC_addtl_static1.BGL.OFF
FTX_NCA_objects_windfarms_CA_PLC_addtl_static2.BGL.OFF
Jim