Here are the directions I take to get to Blue Coat. If you follow an online map program, sometimes they take you a "quicker" route, but the safety of their directions can be a little suspect.
exit El Camino Real
L on S. Mary
Blue Coat will be at 420 N. Mary shortly after you pass the train tracks.
The parking garage is around towards the rear of the complex...if you get this far you can't miss it.