Vulcan Materials This vendor handles: Asphalt (Asphalt with Petromat accepted) Bricks: Broken Cinder Blocks – Recycle Concrete Concrete With Rebar (Rebar must be less than 6 inches) Dirt / Clean Fill (No contaminants or organic material) Rock / Gravel: Clean Website: www.co.contra-costa.ca.us/depart/cd/recycle/options/v5373.htmPhone: 925 485-1279Mailing Address:501 El Charro RoadPleasanton, CADate Updated: 8/9/2014