;Contents: Guidelines for design: Preliminary project planning and engineering report; (environmental compatibility, regionalization, project feasibility, complete and operable treatment works, ultimate disposal of sludge and solids, treatment plant reliability, excessive infiltration, elimination of by-passing, industrial wastes, staffing and budget for a facility, design period, combined sewerage systems); Preparation of plans and specifications; (design summary, reliability, discharges to shellfish, potable or recreational waters, elimination of by-passes and overflows, treatment during construction, experimental processes or equipment, flexibility and ease of operation and maintenance, protection of effluent quality, safety features, interceptor sewers, general requirements); Guidelines for operation and maintenance; (federal and state inspections, personnel, records, reports, and laboratory control, process control).