Volunteer Callout Updated Published Volunteers gather their trash bags after combing the sidewalks along Central Avenue. Giuliana Mayo/LAist Looking for a way to help beautify your community ahead of Earth Day next week? Caltrans is looking for volunteers to help remove some unsightly trash around freeway offramps in Arcadia, Norwalk, Azusa, and the City of Industry. During March and April the state transportation agency has been sending out maintenance crews every weekend in what they call "swarms," to do concrete repairs, landscaping and trash removal. Marc Bischoff with Caltrans District 7 says trash removal has become more of a challenge during the pandemic.