This requirement is for one (1) new hopper assembly and all associated components required for direct installation on a 2007 Schwarze Model A7000 Street Sweeper mounted on a Sterling chassis. All work... This requirement is for one (1) new hopper assembly and all associated components required for direct installation on a 2007 Schwarze Model A7000 Street Sweeper mounted on a Sterling chassis. All work and materials shall meet the requirements outlined in this Statement of Work (SOW).