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V Leakage Defined Leakage is defined as the Quantity of water_to be auantit supplied into the newly laid pipe, or any v it, necessary to maintain the specified lea. after the pipe has been filled with water a. pellecl. Time for making test of cement .jointed pipe hydrostatic pressure. laps the last joint shall have bee Pipes jointed with A lapse ve been cement shall be subject to e of not less than 36 hrs. after n made unless the Engineers shall authorize a. lesser period and jointing aged at least two weeks before testing for leakage. test. The backfill material shall be thoroughly compacted / under and on each side of the pipe to provide solid backing L, against the external surface of the pipe. Backfill Procedure Aboye Pipe Zone ( Succeeding layer^ of backfill may contain coarser ^ Xmaterials, and shall be free from brush or any other perish- able or objectionable matter that would prevent proper conso- / / lids, t ion or that'might cause, subs ecu ent settlement, and shall /( be compacted, thoroughly .'by puddling with hose and long nozzle, ' or byr~f looting the trench, or by tamping if the material does not puddle readily. After hydrostatic test has been^made and trench is to be flooded the pipe shall be tapped at intervals as directed by the Engineer for the purpose of providing water for trench flooding. '"Contractor shall furnish labor, material and tools for this work. It is important that proper precautions be taken to prevent floating of the pipe when flooding the trench, and the Contractor shall be wholly responsible for neglect of these precautions. Any deficiency in Quantity of material for backfilling shall be supplied by Contractor at his expense. Bock and Boulder Exclusion BACKFILL CLEANING UP Backfill Procedure at Pipe Zones » UCLCV UCU urufti 111 Jiir XXV'W. viu x ( boulders shall be deposited in the trench simultaneously on ‘ both sides of the pipe for the full width of the trench and to an elevation of not less than 6 inches above the horizontal v center line of pipes with diameters 12 inches or larger, leaving the joints exposed for examina'tion during the pressure Selected backfill material free from rock or No rock or boulders shall be used in the backfill for at least one foot above the top of the pipe. 9