PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

21.29 Chemical house service water.
The contractor shall arrange for pressure water supply to chemical house, by
tapping the wash water line, that conveys pressure water for back wash filters from
the elevated service reservoir in the same campus. This wash water line is to be
supplied by the contractor and is included in the filtration works. Pipe work fittings
etc. shall be provided by the contractor to ensure that adequate supplies are
available for the works and the any two stock tanks can be filled with water within
20 minutes.
21.30 High pressure water.
The contractor shall provided services pumps on the clear water channel and supply
pressurized water to the chemical house and throughout the works at appropriate
points to enable all external tanks, chambers chemical areas etc., to be hosed down
and to enable all chemical dosing lines to be flushed when required.
21.31 Waste disposal.
The contractor shall arrange the works and shall made provision for the removal of
all waste products, from the site to the mud well situated in the same campus and
functioning to collect by gravity' and dispose off by pumping all the waste products
from the existing treatment plant to a surface stream. Waste shall be removed from
site in an open or closed conduit. Waste disposal shall be by gravity. Particular
attention shall be paid to facilitate cleaning of alum tanks, channels etc. However, if
levels do not permit, only then pumping may be adopted.
21.32 Inter connecting pipe work and drains.
The contractor shall provide the interconnecting pipe work required in the works to
provide a complete operation. He shall include in his offer the waste water
discharge main connected with all the branches provided to collect and dispose the
waste products from the works to the Nala. Tendering contractors shall specify the
rates of flow, diameters and levels of all drains leading from any part of the works
arranged by them in order to suit their own design. These details together with
complete calculations shall be included in the tender submission. The contractor
shall indicate at the time of tendering the location and required capacity of all
drainage points which he required for the satisfactory operation of the works. The
complete drainage requirement shall be finalized by the contractor with in 4 months
of the date of acceptance of the tender. Contractor can choose the piping material as
per requirement.
DTS : Detailed Tender Specification. Page 256