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2 .06 FOUNDATION ROCK <br /> A sieve analysis of the limerock shall conform to the following limits : <br /> Passing 1 " - 100% <br /> Passing 3/4" - 90 - 100% <br /> Passing 3/8 " - 20 - 55% <br /> Passing #4 - 0 - 10% <br /> Passing #8 - 0 - 5% <br /> PART 3 - INSTALLATION <br /> 3 . 01 GENERAL REQUIREMENTS <br /> A. All work shall be proved to be in first class condition and constructed properly in <br /> accordance with the Drawings and Specifications. All defects and leaks disclosed by <br /> required testing shall be remedied. All tests shall be performed by the Contractor and <br /> observed by the Engineer. <br /> B . All pipe and structures shall be installed on dry, firm bedding. The free water surface <br /> shall be shall be lowered to at least 12 inches below the bedding surface prior to placing <br /> pipe or structures and shall be maintained at that depth throughout bedding, haunching, <br /> and initial backfilling of the work. During subsequent backfilling, the water level shall <br /> be kept sufficiently below the working surface to allow compaction of backfill to the <br /> required density, and until required density tests have been performed. <br /> C . Temporary supports shall be installed for adequate protection and maintenance of all <br /> underground and surface structures, water lines, drains, and other obstructions <br /> encountered in the progress of the work. Any structure which may have been disturbed <br /> shall be restored upon completion of the work. <br /> D. Blasting shall not be permitted except by written approval of the Engineer. <br /> E. Trenching and subsequent backfilling within the general construction site shall be <br /> accomplished as expeditiously as possible in order to prevent trench decay and <br /> maintain a clear operational area. <br /> F . Prior to any excavation or trenching outside the designated limits of the work site, the <br /> Contractor shall secure the necessary permits and/or authorization from the applicable <br /> Owner, or confirm that such has been previously obtained. The stipulations of said permit <br /> or authorization shall be completely followed and, prior to construction operations, <br /> notice shall be provided to the appropriate Owner and Engineer. <br /> 3 .02 HANDLING MATERIALS <br /> A. Pipe, fittings, and accessories shall be loaded and unloaded by hand or skidding so as to <br /> avoid shock or damage. Under no circumstances shall such materials be dropped. Pipe <br /> handled on skidways shall not be skidded or rolled against pipe already on the ground. <br /> B . In distributing the material at the site of the work, each piece shall be unloaded opposite or <br /> near the place where it is to be laid in the trench. <br /> 02530 — Gravity Sanitary Sewer Piping <br /> 02530- 3 <br />