03-12-1984 Council Packet - Laserfiche WebLink

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r" 02220. EXCAVATION, BACKFILLING AND GRADING Specific S General Requirements 02220. DESCRIPTION OF WORK: It is the intention of these specifications that the General Contractor will do the general site grading. The General Contractor shall be responsible for all footing and foundation excavation, any excavation that is directly connected with the ramp construction, all backfill and fine grading and cleaning, in all directions, as shown on the plan. 02220.1. GENERAL: All work shall be carried out in a workmanlike manner using the proper equipment, labor and methods appropriate for the project. The Engineer shall be notified when the excavation is ready for backfill and no backfill shall be placed until the excavation is inspected. The grading shall provide for drainage away from and around the structure as indicated on the plan. It is the intention of this spe:_*fication that all work in this section will be completed as part of the lump sum bid. 02220.2. EXCAVATION: All building excavation, including excavation for footings and foundations, shall be large enough to allow construction of footings. Footings shall be placed on solid, undisturbed earth. If excavations are made too deep, the contractor shall start the footings at the extra depth without extra charge. Excess material shall be disposed of on the site. The contractor shall be required to compact the top six inches of soil to 100% standard Proctor density beneath the footings by means of a mechanical tamper prior to pouring any concrete. The Engineer shall be notified of the completion of said tamping to insure inspection prior to pouring concrete footings. 02220.3. BACKFILL: Footing excavation shall be backfilled with suitable material from the site. All backfill shall be compacted to 100% Standard Proctor Density. The Contractor shall place a minimum 6" thick layer of clean Class 4, granular material, under the concrete ramp slab and shall compact this material to 100% Standard Proctor Density prior to pouring the concrete slab. ` All backfill shall be compacted into place utilizing vibratory compaction equipment of appropriate size and weight. Compaction .ests will be taken by an independent testing laboratory designated by the City. Initial tests will be paid for by tb^ City. Any retesting re- quired because of failure to meet the specified dr•ns,'ty will be paid for by ... the Contractor. Density retests will be taken until the compaction meets the specifications. a0-9693b Dil