Res 1990-111 - Laserfiche WebLink

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192 RAMON ~UCIO, RIO VISTA, RIO VISTA ANNEX, AND BICENTENNIAL PARKS RECREATION DEVELOPMENT TECHNICAL SPECIFICATION 13 POTABLE WATER SYSTEM with angle points on line, shall be approved by Engineer and the City of San Marcos Building Inspector prior to Contractor proceeding with the trenching. (2) Trenching shall be open cut with vertical sides from the bottom of the bedding to a point 1 foot above the pipe and a minimum trench width of 12" (pipe zone). The excavation above the pipe zone may be stepped and/or the sides laid back to a stable slope (see Paragraph 12-03 herein above). ( 3) No pipe shall be installed in trench until excavation has been completed, the bottom of the trench graded and the trench completed. Piping shall be installed in a continuous envelope of sand extending at a minimum 4 inches below, 4 inches to the sides, and 4 inches above the outer parts of the pipe, fittings and accessories. (4) Excess spoil will be disposed of by the Contractor, off site, at the Contractor's expense. b. Trench backfill shall not contain any rocks larger than 1/2" in its largest dimension. c. Trench backfill shall be tamped in 6" lifts (compacted) and shall be compacted to the requirements of 2-07. Contractor shall mound excess fill on top 0-£ fillec:1 trench. Contractor will be required to fill any low spots on trenches that develop after backfill. d. All work shall be performed using the best practice of the trades involved. 13-06 CLEANUP: a. The Contractor shall make final cleanup of all parts of the work before final acceptance. This cleanup shall include removal of pieces O-f concrete and other construction materials, backfilling, grading to drain, finish grading, and in general preparing the site in a neat and finished appearance. 13-3