A conveyor system is provided, comprising an endless belt mounted in a longitudinal direction through the service line, the endless belt having an upper transport portion adapted to move a wheeled structure through a service line, and a lower return portion, a support deck positioned below the upper transport portion of the endless belt to support the endless belt, the support deck having a belt contact surface extending along a top of the support deck and in contact with the upper transport portion of the endless belt, the belt contact surface being constructed from a material that is at least partially thermoplastic, a belt rinsing system including a rinsing system conduit arrangement connectable to a source of rinsing system liquid, and at least one belt rinsing arrangement, wherein each of the at least one belt rinsing arrangement includes a rinsing system dirt pass-through aperture in the support deck.