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� <br /> ISECTION 02221 ISSUE A <br /> TRENCHING, BACKFILLING AND COMPACTING 25 JUNE 84 <br /> 1 DRT I <br /> I PARTI - GENERAL <br /> ( I.01 DESCRIPTION <br /> I <br /> A. RELATE� WORK SPECIFIED ELSEWHERE: <br /> i I. Storm Drainage, Section 02400 <br /> 2. Water Distribution, Section 02713 <br /> 3. Sanitary Sewerage System, Section 02722 <br /> I B. DESCRIPTION OF WORK <br /> I This work shall consist of The necessary excavoTing for storm drains, <br /> sanitary ;ewers, water lines and underground power in conformance with The <br /> drawings and specifications; und ihe backfilling of completed culverts, poipe <br /> � drains, sanitary sewers and other structures and ihe disposol of all exco- <br /> I vated materi,il. <br /> � 1.02 �UALITY ASSURANCE <br /> A. STANDARDS <br /> i The "STandard Specification for �'vlunicipal Public Works Construction," <br /> published by the Washington State Chapter, American Public Works Associa- <br /> tion (AF'WA), 1977 Edition, shall apply unless modified herein. <br /> i <br /> PART 2 - MATERIALS <br /> I 2.01 BEDDING <br /> See API�YA Section 61-3.05C5 for beddinq material. <br /> � <br /> PART 3 - EXECUTION <br /> I 3.01 BEDDING <br /> A. When bedding material is used, the irench shall be excavated 4 inches below <br /> ihe bottom of ihe pipe and filled up to pipe grode with gronular bedding <br /> moterial. <br /> � B. Where rock, hardpan, or other unyieldi�g material is encountered, it shall be <br /> removed below ihe bedding grade for a depth of at least f 2 inches. The <br /> widih of ihe excavation shall be one foot greater ihan ihe horizontal outside <br /> diameter of the pipe. The excavation shall be back",' �d with bedding <br /> material as described in 2.01. <br /> 02221-I <br /> 8301 � <br />