Section 612 — Sanitary Sewer Systems

Description

612.01This work consists of constructing or reconstructing sanitary sewer systems.

Material

612.02Conform to the following Subsections: Acrylonitrile -butadiene- styrene (ABS) pipe 708.08 Cast iron soil pipe and fittings 707.15 Detectable warning tape 725.11 Gaskets for plastic pipe 708.09 Precast concrete water and wastewater structures 725.09(e) Smooth wall polyvinyl chloride (PVC) pipe 708.06(b) Soil and soil- aggregate materials 704.01

Construction Requirements

612.03General. Conform to the standards of APWA, AWWA, International Building Code and local agency plumbing and safety codes. Obtain permits, arrange for inspections, and pay fees necessary to obtain sewerage service. Excavate according to Section 209. Place bedding for pipes according to Subsection 209.08. Coordinate service interruptions with the user or owner of the sewer line. Provide temporary sewer lines to ensure a sewer supply is maintained. Connection work may be required during times other than normal working hours. Do not stop work on a connection until it is completed. Dispose of disinfectant for sewer lines according to Subsection 107.01. Do not allow disinfectant to enter a body of water. 612.04 Laying Sewer Lines. Inspect each joint and clean the pipe and bell before placing in the trench. Lay the sewer line from the lower end with the spigot ends pointing in the direction of flow. Fully support each length between joints and check for line and grade before placing the next length. Check the gasket for proper positioning and shove sewer pipe into proper position where premolded watertight gaskets are used. Position the pipe and fill the joint completely with joint sealer if poured joints are used. Allow the sealer to cool completely before removing the runner.

612.05Backfilling. Backfill according to Subsection 209.09. P lace backfill to a depth of 12 inches above the top of the pipe using a method that does not damage the pipe. Install continuous underground detectable warning tape during backfilling of trench for underground sewer -distribution piping. Locate below finish ed grade, directly over piping. Flush the lines with water to ensure they are unobstructed after backfilling. Provide acid- and alkali -resistant, polyethylene film warning tape manufactured for marking and identifying underground utilities, at least 6 inches wide and 4 mils thick, continuously inscribed with a description of the utility, with metallic core encased in a protective jacket for corrosion protection, detectable by metal detector if tape is buried up to 30 inches deep; colored to comply with loca l practice or requirements of authorities having jurisdiction.

612.06Acceptance. Material for sanitary sewer systems will be evaluated under Subsections 106.02 and 106.03. Installation of sanitary sewer systems will be evaluated under Subsections 106.02 and 106.04. Excavation and backfill will be evaluated under Section 209.

Measurement

612.07Measure the Section 612 pay items listed in the bid schedule according to Subsection 109.02 and the following as applicable: When measuring sewer lines by the linear foot, measure along the flow line including the length through valves, ells, tees, valve boxes, reducers, manholes, or other fixtures. Where two different sizes enter or exit a manhole, measure each size to the center of th e manhole.

Payment

612.08The accepted quantities will be paid at the contract price per unit of measurement for the Section 612 pay items listed in the bid schedule. Payment will be full compensation for the work prescrib ed in this Section. See Subsection 109.05 . Progress payments for lump sum pay items will be prorated based on the price breakdown and total work completed under this Section .