From Dublin:  Take 680 North.  Exit South Main Street.  Continue through first stop light.  Make a right into 1600.  We are in the building on the right, ground floor.  Parking is in rear of building.                   From Antioch: Take CA-24 West towards Oakland.  Merge onto CA-242 South towards Oakland/Concord.  Merge onto I-680 South towards Oakland/San Jose.   Exit South Main Street.  Make a left onto South Main Street.  Continue through first stop light.  Make a right into 1600.  We are in the building on the right, ground floor.  Parking is in rear of building.  From Martinez:  Take 680 South.  Exit South Main Street.  Continue through first stop light.  Make a right into 1600.  We are in the building on the right, ground floor.  Parking is in rear of building.  From Oakland:  Take CA-24 East towards Berkeley/Walnut Creek.  Merge onto I-680 South towards San Jose/Dublin.   Exit South Main Street. Make a left onto South Main Street.  Continue through first stop light.  Make a right into 1600.  We are in the building on the right, ground floor.  Parking is in rear of building.