Excavation and backfill shall conform to the requirements for
subsurface structure excavation. The contractor shall provide adequate
equipment and so operate it as to maintain an essentially dry excavation,
stable trench bottoms, suitable working conditions and protection
from water damage throughout and until the completion of the work.
All fittings and valves shall be set accurately true to and
square with pipelines. Valve stems shall be accurately plumb. Fittings
and valves shall be supported by approved blocking so as to ensure
their remaining accurately in position during jointing and in such
manner that their weight will not place undue strain on connecting
pipe. Joint valves boxes shall be set plumb, accurately centered with
respect to the valve stem, well supported by solidly tamped earth
and with their tops flush with the finished surface grade of the roadway
or surface of the ground where set. Pipelines shall be rodded or thrust-blocked
at all bends greater than 10° and at all tees, plugs, valves and
fire hydrants so as to prevent movement of the lines under pressure.
A means of backflow prevention shall be provided on all water mains
for fire service or where water backflow may occur.
Existing water service shall not be interrupted unless necessary
for the completion of the work and then only in accordance with the
requirements of the Edgewater Park Township Water Department.