SECTION 3 EARTHWORK FOR STRUCTURES 3-01, GENERAL REQUIREMENTS: a. This division of the work includes furnishing all labor and equipment required to complete earthwork for structures and appurtenances as shown on the plans and herein specified. db. Earthwork for utility lines outside structures is specified in Section 4 of the specifications, and for roads and airfield is specified in Section 2, 3-02, EXCAVATION: &@ All debris, including roots, weeds, sod or other organic matter, shall be removed from earth over which buildings or other structures are to be placed. be Excavations shall be to depths, lengths and breadths indicated and/or required for the proper installation of all work to be placed on or in earth, with ample allowance for proper installation and removal of form work, for placing of waterproofing, and for inspection, Ce Excavations to depths shown for foundations shall reach suitable supporting material, When suitable supporting material is not reached at depths shown on drawings, the Engineer's instructions shall be obtained and followed. de When foundation excavations are erroneously mad: deeper than required, the extra depth’ shall be filled with concrete as specified for foundations, @. All trimming shall be by hand. Excavations for footings may be made to net sizes only if approved by Engineer. sloped. Changes in footing grades shall be stepped, not f. Bottoms of trenches shall be trimmed to true level, all loose materials removed, and bottoms moistened and tamped firm before concrete is placed, g.- The Engineer shall inspect and approve all eart work before earth fill and/or concrete is placed thereon, Xn -1