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ST. BARBARA CATHOLIC SCHOOL TASK 2 75-24272-01 <br />DIOCESE OF ORANGE SEPTEMBER 12TH, 2024 <br />SANTA ANA, CA BID & PERMIT SET <br /> <br />EARTHWORK 312000 - 8 <br />1. Excavations for Footings and Foundations: Do not disturb bottom of excavation. <br />Excavate by hand to final grade just before placing concrete reinforcement. Trim <br />bottoms to required lines and grades to leave solid base to receive other work. <br />2. Excavation for Underground Tanks, Basins, and Mechanical or Electrical Utility <br />Structures: Excavate to elevations and dimensions indicated within a tolerance of plus or <br />minus 0.10 foot. Do not disturb bottom of excavations intended as bearing surfaces. <br />B. Excavations at Edges of Tree- and Plant-Protection Zones: <br />1. Excavate by hand to indicated lines, cross sections, elevations, and subgrades. Use <br />narrow-tine spading forks to comb soil and expose roots. Do not break, tear, or chop <br />exposed roots. Do not use mechanical equipment that rips, tears, or pulls roots. <br />3.7 EXCAVATION FOR WALKS AND PAVEMENTS <br />A. Excavate surfaces under walks and pavements to indicated lines, cross sections, elevations, and <br />subgrades. <br />3.8 EXCAVATION FOR UTILITY TRENCHES <br />A. Excavation made with power-driven equipment is not permitted within two feet of any known <br />utility or subsurface construction. For work immediately adjacent to or for excavations <br />exposing a utility or other buried obstruction, use hand or light equipment excavation. Start <br />hand or light equipment excavation on each side of the indicated obstruction and continue until <br />the obstruction is uncovered or until clearance for the new grade is assured. Support uncovered <br />lines and other existing work affected by the excavation work of this Section until approval for <br />backfill is granted by the geotechnical engineer. Immediately report damage to utility lines or <br />subsurface construction to the Owner. <br />B. Where unidentified existing utilities are encountered, determine whether these are active or <br />abandoned. Remove interfering portions of abandoned utilities and cap or plug open ends of <br />pipe to remain. The cap or plug must seal the opening in such a manner that would permit <br />remaining portions of the utility to be reactivated. Notify Owner for instructions on utilities <br />which are determined to be active. Do not proceed without instructions, except to correct an <br />immediate hazard or emergency condition. Relocation work performed on an active utility <br />without obtaining prior approval from Owner shall be done at the Contractor's expense and <br />liability. <br />C. In areas where compacted backfill has been placed, additional consolidation may occur after <br />completion due to changes in moisture content and surcharge. Utility connections crossing this <br />backfill, and improvements adjoining the building at the backfill line shall be installed taking <br />into account this additional consolidation, or sufficient time shall be scheduled between <br />backfilling operations and such improvements to allow this consolidation to take place. <br />Damage to utilities or other improvements due to Contractor's negligence in regard to this <br />paragraph shall be repaired at the Contractor's expense