Two projects in the southern part of the Bay Area could serve as the new baseline for environmentally sustainable buildings. In Mountain View, AP+I Design employees might feel a little tipsy as they relax in the lounge of their new digs on Easy Street. That’s because they’ll be sitting on a bench curving its way around a rotund wall constructed out of wine-barrel staves. Specifically, the side of the staves that made the barrel interior was used, so the wall retains the deep, dark red stain left by volumes of wine.