More than just the people who are responsible for picking up your trash and recycling each week, members of the Castro Valley Sanitary District also conduct year-round environmental education programs for youth; offer grants to schools that support the Four Rs (Reduce, Reuse, Recycle, Rot); and provide on-site volunteer opportunities for individuals and groups, including high school students. Board meetings are held on the first Tuesday of each month at 6:30 p.m. at the district office located at 21040 Marshall St.