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

The contractor shall assume full responsibility to make the project complete
perfectly keeping the intent and requirement of the project in mind.
The Bidder shall furnish with the technical offer, the detail of civil component,
plant & machineries. The Bidders’ in their technical offer shall clearly mention the
‘Make’ of the equipments they shall offer for the job which shall strictly be selected
from the annexed vendor list of equipments. Detail technical information, brochure,
literature and specifications shall also be submitted with the offer. Since the tender
is a complete package of Civil and Electro-mechanical works and the Bidders may
not be essentially the reputed manufacturer of these equipments or manufacturer of
well repute for other major electro-mechanical components, control and
instrumentation panel etc. The Bidders along with the technical offer, shall have to
furnish a back to back guarantee from the respective manufacturers of major
components as per annexure/line of confirmation to this effect.
However the guarantee from the manufacturers’ will not relieve the contractor from
their responsibility of executing the job successfully as per intent, terms and
conditions of the tender. The drive and the driven unit shall be considered as one
composite item and the performance of the whole composite item should be
guaranteed for.
21.5 The different units of the plant as envisages under the scope of the
tender are:
Inlet works:
The inlet works shall comprise of stilling chamber and measuring channel. The
existing inlet works of the 34.05 MLD water treatment plant shall be extended and
shall have a common stilling chamber where still water shall flow to both inlet of
34.05 MLD WTP and to inlet of 8 MLD WTP.
Chemical house and dosing systems:
Chemical house of adequate size for storage of chemicals and for preparation of
chemical solution required for treatment is proposed for construction. Alum with a
solution strength of 5 to 10% is proposed to be used as coagulant. For preparation of
alum solution, 2 alum mills are proposed to be installed each alum solution tank
shall have a capacity to hold 8 hrs. requirement at the maximum demand of
chemical at the designed flow. The solution shall gravitate to a constant head dosing
tank placed over the raw water channel and the solution shall flow directly from the
dosing tank into raw water channel through a taper needle valve at a preset dosage
which shall adjust itself automatically to any change in flow rate of raw water. For
DTS : Detailed Tender Specification. Page 239