Take I680 South to Hwy 4 East.
On Hwy 4, exit Solano Way (1st exit).
Curve right off ramp so you are heading back the way you came.
Turn right at 1st traffic light (Solano Way).
Go under the freeway to next light (Imhoff Dr.) and turn left on Imhoff.
Where the center divider ends, turn left into Concord Business Park.
We are in the building on right. #5650, unit H.