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PART 3 -EXECUTION <br /> 3.1 PREPARATION <br /> A. Precautions: Close equipment shutoff valves before turning off gas to the premises or <br /> section of piping. Perform leakage test as specified in "Field Quality Control" Article to <br /> determine that all equipment is turned off in the piping section to be affected. <br /> B. Comply with NFPA 54"Prevention of Accidental Ignition." <br /> 3.2 EXCAVATION <br /> A. Excavation,trenching;and backfilling is specified in Division 2 Section "Earthwork." <br /> 3.3 PREPARATION OF FOUNDATION FOR BURIED PIPING <br /> A. Grade trench bottom to provide smooth,firm, stable,and rock-free foundation throughout <br /> length of piping. <br /> B. Remove unstable,soft,and unsuitable materials at surface on which piping is to be laid, <br /> and backfill with clean sand or pea gravel to indicated level. <br /> C. Shape bottom of trench to fit bottom of piping. Fill unevenness with tamped-sand <br /> backfill. Dig bell holes at each pipe joint to relieve bells of loads and to ensure <br /> continuous bearing of pipe barrel on foundation. <br /> 3.4 SERVICE ENTRANCE PIPING <br /> A. Extend natural gas piping and connect to gas distribution system(gas service)piping in <br /> location and size indicated for gas service entrance to building. <br /> 1. Gas distribution system piping,service gas pressure regulator, and gas meter will be <br /> ' provided by gas utility. <br /> 2. Include gas distribution system piping to point indicated. <br /> 3. Include gas distribution system piping to point indicated,gas service pressure <br /> regulator,and gas meter. Install in piping and specialty arrangement indicated. <br /> B. Install buried gas distribution system piping with 2 feet minimum cover. <br /> C. Install shutoff valve,downstream of gas meter,outside building at gas service entrance. <br /> ADDENDUM#2 <br /> 1607.001 -ORONO ICE ARENA(CP-2) Page 15488 - 8 <br />