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1 <br /> 3. Provide and maintain pumps, well points, sumps, suction and discharge <br /> lines, and other dewatering system components necessary to convey <br /> water away from excavations. <br /> G. Stockpile satisfactory excavated materials where directed, until required for <br /> backfill or fill. Place, grade and shape stockpiles for proper drainage. <br /> H. Excavation for Trenches: Dig trenches to the uniform width required for <br /> particular item to be installed, sufficiently wide to provide ample working room. <br /> Provide minimum 6 in. clearance on each side of pipe or conduit. <br /> 1. Excavate trenches to depth indicated or required for indicated flow lines <br /> 1 <br /> 2. and invert elevations. <br /> Where rock is encountered, carry excavation 6 in. below scheduled <br /> elevation and backfill with a 6 in. layer of crushed stone or gravel prior to <br /> installation of pipe. <br /> 3. For pipes or conduit 5 in. or less, excavate to indicated depths. Hand <br /> excavate bottom cut to accurate elevations and support pipe or conduit <br /> on undisturbed soil. <br /> 4. For pipes or conduit 6 in. or larger, tanks and other work indicated to <br /> receive subbase, excavate to subbase depth indicated, or, if not <br /> 1 otherwise indicated, to 6 in. below bottom of work to be supported. <br /> 5. Except as otherwise indicated, excavate for exterior water-bearing piping <br /> so top of piping is minimum 3'-6" below finished grade. <br /> ' 6. Grade bottoms of trenches as indicated, notching under pipe bells to <br /> provide solid bearing for entire body of pipe. <br /> Do not backfill trenches until tests and inspections have been made and <br /> backfilling authorized by Engineer. <br /> 3.02 COMPACTION <br /> A. Areas to be compacted shall be moistened and compacted by either rolling, <br /> tamping or any other approved method by the Engineer in order to obtain the <br /> desired density. The Contractor shall inspect all compacted areas prior to further <br /> construction operations to ensure that satisfactory compaction has been <br /> obtained. All backfill adjacent to structures and pipes, shall be compacted to a <br /> density of not less than 100 percent of the maximum density as determined by <br /> AASHTO T-99. Density tests are required, such tests shall be made as directed <br /> by the Engineer at the expense of the Contractor. The Contractor shall instruct <br /> the testing laboratory to forward copies of all test reports to the Engineer. <br /> B. Remove and replace, or scarify and air dry, soil material that is too wet to permit <br /> compaction to specified density. <br /> 1 <br /> 1 <br /> 05/08 02200-3 05-4893 <br />