3-03. WATER AND SHORING: a. Water shall be removed from excavations as soon as it accumulates. Ground surfaces néar excavations shall be sloped to drain away when possible, b. Shoring, bracing and like devices shall be pro- vided as required for support of adjoining materials to remain in place and shall be removed when no longer required. 3-04, BACKFILL: @e Backfill material shall be sound excavated material or equal borrowed materials as approved by Enginee. and shall be free of debris and organic matter, and rock or concrete fragments over 6 inches in diameter. Material shall be thoroughly divided and properly dampened to optimum moisture content. b. Backfill shell be placed only after all formwork. shoring, debris, cave-in or other loose material has been removed, after waterproofing, if called for, has been ap-= plied; and after work on which or against which backfill is to be placed has been inspected and approved by the Engineer. Ce . Placing of backfill shall be in layers of 6-inch maximum thickness, Compaction shall be by hand tools or mechanical equipment approved by the Engineer. Puddling with water shall be done only when approved by the Engineer 3-05, FILL: &e Material for fill and manner of placing shall be as hereinbefore specified for backfill, except where otherwise provided. be Areas to receive fill shall be stripped and cleared and soil scarified and loosened to a depth of 3 inches before fill is placed. 3-06, EARTH UNDER CONCRETE SLABS: & Earth to receive concrete slabs shall be brought to required grades, dampened to optimum moisture content and compacted to 90% of maximum density. be On natural or cut grades, the areas shall be scarified and loosened to a depth of 3 inches before compaction, 3-2