(a) Licensing of Contractor. Before a contractor can commence water line construction within the Village, he must first obtain a license as required under Section 1020.03
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(b) Preparation of Trenches. Except in rock, water-bearing earth or where granular fill or concrete is to be used, mechanical excavation of trenches shall be stopped above the final invert grade elevation so that the pipe may be laid on a firm, undisturbed earth bed. The bottom portion of the trench shall then be hand excavated to conform to the shape of the pipe barrel, and bell holes dug so that after placement only the barrel of the pipe bears on the trench bottom. If over- digging occurs, all loose dirt must be removed and the trench brought to grade with granular material.
A four-inch minimum foundation of granular material must be used in trenches where rock or water-bearing earth is encountered and may also be placed under the pipe in lieu of hand excavating for the pipe barrel and bell holes at the contractor's option. Trenches shall be dry when the trench bottom is prepared.
The width of trenches shall be such as to provide adequate space for workmen to place and joint the pipe properly, but in every case the trench shall be kept to a minimum width.
The contractor shall be responsible for installing all necessary sheeting and bracing to support the walls of the trench and existing structures.
(c) Pipe Laying. Pipe shall be protected during handling against impact, shocks and free fall, and shall be kept clean at all times. Block or brick shall not be used under the pipe except as temporary blocking. Before any pipe and fittings are placed in the trench, they shall be checked for defects by the Sewer and Plumbing Inspector.
All pipe shall be installed with a minimum cover of four feet.
Hydrants shall be set on a concrete or concrete block base and braced on the side opposite the branch opening by concrete or a concrete bearing block extending to solid earth. Approximately one-half yard of coarse gravel shall be placed under and around the base of the hydrant to allow for escape of the drain water.
(d) Blocking. At all changes in direction of the pipe, a concrete block shall be poured or placed between the pipe and the undisturbed wall of the trench to prevent lateral deflection of the pipe.
(e) Backfilling. No backfilling over completed structures shall be done without permission of the Inspector. All joints shall be left exposed until the pipe has been tested.
Materials for backfilling shall be reasonably free from rubbish, muck, stones exceeding one cubic foot in volume, and other unsuitable materials, and the contractor shall provide satisfactory filling materials.
For a height of eighteen inches above the top of the pipe, the backfill shall be composed of fine material free from stones and an excess of water, and shall be placed completely under the pipe haunches and thoroughly tamped with satisfactory tamping equipment. All trenches which lie in roadways or driveways shall be compacted in eight-inch layers (loose depth) or filled with suitable granular material for the full depth of the trench, as required. Puddling of trenches shall not be allowed without permission of the Sewer and Plumbing Inspector.
(f) Disinfection. Water lines shall be disinfected according to the "Procedure for Disinfecting Water Mains" prepared by the A.W.W.A.
(g) Testing. A hydrostatic test, in accordance with the recommendations of the Cast- Iron Pipe Research Association and outlined in their Handbook of Cast-Iron Pipe, shall be made on all completed water lines. The test pressure shall equal the pressure under which the line will operate, plus fifty percent. Allowable leakage shall not exceed the amount specified in the A.W.W.A. specification for installation of cast-iron water mains (C-600-49T). All labor, material and equipment necessary to properly conduct the test shall be furnished by the contractor. (Ord. 871. Passed 2-3-64.)