PWA and GSA-MVD require a Contractor to remove discarded tires and recycle or dispose of them. Used tires are considered hazardous materials, and according to the California Tire Recycling Act, they need to be disposed of properly. For PWA, discarded tires are stored at two separate locations at the PWA Corporation Yard in Dublin: The Fleet Department at 6089 Madigan Rd, and The Road Maintenance Department at 4825 Gleason Dr. Contractor will be required to remove discarded passenger/light-duty vehicle tires, medium-duty and heavy-duty truck tires, off-road and construction equipment tires, passenger vehicle rims, truck and construction equipment rims (including medium-duty and heavy-duty truck rims), and other tires and/or rims smaller than passenger vehicle tires/rims from the PWA Corporation Yard on a regular and scheduled basis. PWA accumulates discarded tires that require removal and disposal. The Fleet Department replaces old, worn, and damaged tires on the equipment and vehicles they maintain. The Road Maintenance Department removes debris, including tires, from the County right of way. Tires are not easily disposed of at landfill sites and require removal from the PWA Corporation Yard by a third party.