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I <br /> I3.06 EXCAVATION: <br /> I A. Layout: All work shall be surveyed and staked by the Contractor as required to complete <br /> earthwork. Maintain all benchmarks, control monuments and stakes, whether newly <br /> established or previously existing. Protect from damage and dislocation. If necessary to <br /> I disturb existing benchmarks, re-establish in a safe place. Notify Engineer a minimum of <br /> 3 days prior to excavation of work areas. Engineer shall inspect staking and layout of <br /> work. <br /> IB. Excavation for Trenches: Provide neat trenches to the depth, slope (where appropriate) <br /> and width as indicated in the Contract Drawings. Allow for import of surfacing materials <br /> Iand bedding. Provide clean, smooth trench walls and trench floors. <br /> 3.07 Excavation Safety Systems: Provide all trench excavation in excess of 4 feet in depth with a <br /> safety system conforming to the referenced requirements. <br /> I <br /> 3.08 COMPACTION: <br /> I A. General: Control soil compaction during construction providing minimum percentage of <br /> density specified for area classification. Do not allow equipment traffic to overly <br /> compact areas beyond specified percentages. Remediate over-compaction as directed by <br /> I the Engineer including ripping, re-grading and re-compaction or over-excavation and in- <br /> kind replacement per plan. <br /> I B. Percentage of Maximum Density Requirements: Compact soil to not less than the <br /> following percentages for maximum density for soils which exhibit a well-defined <br /> moisture density relationship (cohesive soils) determined in accordance with ASTM <br /> I D698; and not less than the following percentages of relative density; determined in <br /> accordance with ASTM 4253, for soils which will not exhibit a well defined moisture <br /> density relationship(cohesionless soils). <br /> 1 1. Backfill: <br /> a. Solid Piped Drainage Bedding under pipe-95% <br /> b. Solid Piped Drainage Bedding over pipe -75% <br /> 1 <br /> c. Solid Piped Drainage Backfill-95% <br /> d. Perforated Piped Drainage Bedding and Top Lift,water settle, 75%. <br /> e. Irrigation Pipe Bedding below pipe -95% <br /> f. Irrigation Pipe Bedding over pipe -hand tamp to 75% <br /> g. Irrigation Pipe Backfill -85% <br /> h. Over excavation Backfill of Existing Sub-grade to remain-95% <br /> I 2. Sub-grades: <br /> a. Sub-grade soils in lawn areas(outside Playfield) -75% <br /> b. Sub-grade soils on Playfield-90% <br /> Ic. <br /> d. Base Sand on Playfield-95% <br /> Sub-grade soils in landscape planting areas-70% <br /> e. Import aggregate base material in paving areas -95%. <br /> 3. Surface Fills: <br /> a. Playfield Soils-85% <br /> b. Planting Soils -70% <br /> c. Structural Soils -90% <br /> Id. Fills on slopes exceeding 3:1,to prevent erosion-90% <br /> Legion Golf Course Stormwater Detention Project December 1,2017 <br /> IWO#UP3620 310000-7 <br />