1999-338A - Laserfiche WebLink

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4& r 4 1 1. SCOPE A. The Contractor shall furnish all of the material, equipment, plant, labor, transportation and supervision necessary so as to complete the Work as + shown on the Plans and specified herein. 2. GENERAL A- Where structures or unsuitable material have been removed suitable backfill or fill material shall be provided, placed and compacted to elevate the site to the finish grade as shown on the grading plans. Pre -fill compaction shall j be accomplished prior to this operation, as specified herein. 3. MATERIAL A. fmigmLEM - All humus, peat, spongy material, roots, stumps, muck, paving materials, and other objectionable materials shall be unsuitable for backfill. Suitable material for backfill shall consist of sandy -loam, clayey - sand, sand, gravel, soft shale, or crushed stone. The Engineer shall be the N sole judge of what constitutes suitable and unsuitable material for backfill other than those materials listed above. B. Select F,jjj - Shall consist of uniform, clean, free draining sand, containing less than 4% fates passing a No. 200 sieve. Laboratory test results of this fill shall be submitted to the Engineer for his approval. C, F;1trr MalCZWl - Shall consist of a washed sand containing less than 2% fines passing a No. 200 sieve and must have a uniformity coefficient of 1.5 or greater but not more than 4.0. Effective grain size shall be between 0.20 and 0.55 millimeters diameter. l 4. SORROW A If there is not sufficient excavated material of a suitable quality to complete the work, the Contractor shall provide and deliver the necessary suitable additional material to the job site. 5. UNsiJTFABLE MATERIAL REPLACEMENT A. Fill material shall be placed and spread evenly in layers not to exceed eight inches before compaction. All fill material shall be free from vegetable matter, wood, and other deleterious substances, and shall not contain rocks or clods having a diameter of more than three inches. B. If soil cement paving is proposed, local yellow sand or hard pan shall not be used for the subgrade nor in the base. 6. pRE-FILL COMPACT -ION A. Should the pre -fill surface elevation be below that required for the base of proposed building foundations or paving subgrade, the areas within road rights -of -ways, under parking areas, and the areas under and within five feet of proposed buildings shall be precompacted. This precompaction shall be performed equally on existing. ground and on surfaces which have been excavated to remove unsuitable material. The top one foot of said areas shall be compacted to a minimum density of 95% of maximum as determined by AASHTO T-180. The maximum spacing between density zc-t k