LunaseeStudios / Shutterstock.com Milk & Juice Cartons Curbside Trash Curbside Recycling LunaseeStudios / Shutterstock.com Depending on the city you live in, please reference the requirement below: For the City of El Cerrito, you may place this type of material in your curbside recycling; however, please rinse and dry. Food traces contaminate the recycling process. For the other Cities (Richmond, San Pablo, Hercules, Pinole and unincorprated West Contra Costa County), you may place this type of material in your curbside trash. Screw-On Caps Are OK It’s OK to leave the screw-on cap on the container when you’re recycling it.