Work included in this ITB includes, but is not limited to: 1) Wastewater collection pipeline and lift station cleaning using high velocity hydro-cleaning and vacuum removal equipment 2) Sewer lines to be cleaned are VCP, DIP, and PVC and range in sizes from 6 to 30 inches in diameter. 3) The designated sewer manhole sections shall be cleaned using hydraulically propelled, highvelocity jet, or mechanically powered equipment approved by the CRRUA. Cleaning shall consist of normal hydraulic jet cleaning to facilitate internal inspection if needed. 4) If the pipe condition is such that cleaning may cause a potential collapse, then the pipe shall be televised without attempting to clean it pending approval by CRRUA. 5) Types of cleaning of sanitary sewers: a) Light cleaning of sewers consists of a maximum of 1 pass of the jet nozzle. Light cleaning of laterals will consist of flushing water into a cleanout. b) Medium cleaning of sewers consists of 2 to 4 passes of the jet nozzle. Medium cleaning of laterals will consist of 1 to 4 passes with a jet nozzle. c) Heavy cleaning consists of 5 or more passes of the jet nozzle such as removing heavy grease, debris, and roots. d) Descaling of Ductile Iron pipe: Multiple passes with mechanical equipment to remove scale build up to restore pipe to original inside diameter. 6) Lift Station cleaning will consist of vacuuming debris (grease, rags and other inorganic material) off liquid surface and with the assistance of CRRUA staff the lift station will be pumped empty to remove any items that have settled to the bottom of lift station. Selection of the equipment used shall be based on the conditions of lines at the time the Work commences. The equipment and methods selected shall be satisfactory to CRRUA. The equipment shall be capable of removing dirt, grease, rocks, sand, debris, other materials, and obstructions from the sewer lines, laterals, and manholes. TV Inspection -- Contractor shall inspect at the gravity sewer using closed circuit television (CCTV) at locations within the System as directed by CRRUA. All data obtained from the performance of such Project services shall be compiled and transmitted in digital format to the CRRUA.
