Upload
truongcong
View
214
Download
0
Embed Size (px)
Citation preview
Scanned by CamScanner
Scanned by CamScanner
Name of work: - Rehabilitation and Up-gradation of Kondli: Phase I (45.5 MLD), Phase II (113.7 MLD) & Phase III (45.5MLD) Wastewater
Treatment Plants (WWTPs) with effluent standards of BOD -10 mg/l, TSS –10 mg/l or better under YAP (III) (Package K3)
Reply to Pre-bid Queries
Page 1 of 14
S.
No. Volume Page Clause
Subject / Particulars as per Bid
Document Bidder’s Queries Reply
Bidder 1
1) Volume 1 33 Cover Page
ITB 1.1 Bid Data
Sheet
Reference ID No.
BID-YAP-(III) (K3/2017/18)
Identification and number of the
lot(s) (contract(s)) comprising this
ICB are: BID-YAP (III) (K3/2016-
17)
Kindly clarify which is the correct
IFB number as bidders are required to
quote the same in various Forms
given in the tender document
Please read IFB no. as
“BID-YAP-(III)
(K3/2017/18)”
2) Volume 1 37 ITB 22.2 Bid Data
Sheet
The written confirmation of
authorization to sign on behalf of the
Bidder shall consist of: Original
Power of Attorney (legally valid) for
authorised signatory of the Bid.
As per our understanding of the
clause, Original Power of
Attorney(s), specific for the current
project, in favour of authorised
signatories of Joint Venture partners
and a Power of Attorney in favour of
Lead Partner is required against this
criteria. Kindly clarify ?
As per bid document
Bidder 2
3) Volume – 2, Section :
X, Part ‐ 9 List of
Approved makes
744 39 Approved makes of DAF thickener We, TRIVENI are one of the reputed
manufacturers of water treatment
equipments and we have
manufactured, supplied, Installed and
commissioned several DAF thickener
units. A partial list of DAF
installations is enclosed herewith for
your ready reference.
It is worthwhile to mention that our
name is already there for other
Process Equipments namely
As per bid document
Name of work: - Rehabilitation and Up-gradation of Kondli: Phase I (45.5 MLD), Phase II (113.7 MLD) & Phase III (45.5MLD) Wastewater
Treatment Plants (WWTPs) with effluent standards of BOD -10 mg/l, TSS –10 mg/l or better under YAP (III) (Package K3)
Reply to Pre-bid Queries
Page 2 of 14
S.
No. Volume Page Clause
Subject / Particulars as per Bid
Document Bidder’s Queries Reply
Clarifiers, Gravity Thickener, Gas
Mixing etc but it is not there for DAF
Thickener. Therefore, we request you
to incorporate our name in the
approved vendor list for DAF
thickener also.
4) Volume – 2, Section :
X, Part ‐ 9 List of
Approved makes
740 List of Approved Makes: Blowers
and Chlorinator
We wish to bring your attention to
the fact that only foreign makes are
listed against crucial major process
equipments for Chlorinator and
Aeration Turbo/Centrifugal Blowers.
We therefore request you to add the
names of some reputed Indian makes
as this is an era of “MAKE IN
INDIA”.
For air blowers, Indian makes like
SWAM, EVEREST can be added as
they also manufacture turbo air
blowers.
For Chlorinators, Indian makes like
Industrial devices, Perfect Chloro,
Capital Control may be considered.
As per bid document
5) Sl. No. 6 of C&A no.
2
2 S. No. 6 Technology Quote: “Though suggested process
details to achieve guaranteed effluent
parameters are mentioned in Part -2,
however process technology is open
and bidders can adopt any proven
ASP/modified ASP technology for
achieving the effluent parameters to
Bidder is free to make
changes in the existing
structure as per
requirement taking into
consideration of space
constraint and available
hydraulic levels from
Name of work: - Rehabilitation and Up-gradation of Kondli: Phase I (45.5 MLD), Phase II (113.7 MLD) & Phase III (45.5MLD) Wastewater
Treatment Plants (WWTPs) with effluent standards of BOD -10 mg/l, TSS –10 mg/l or better under YAP (III) (Package K3)
Reply to Pre-bid Queries
Page 3 of 14
S.
No. Volume Page Clause
Subject / Particulars as per Bid
Document Bidder’s Queries Reply
be guaranteed without any basic
changes in the structures available
for rehabilitation in present WWTPs
on economical life cycle cost basis.
Bidders to furnish the sufficient proof
of at least 60 MLD WWTP on such
proposed technology, running
successfully for minimum for last 5
year”.
Query: We understand/infer from the
phrase “without any basic changes
in the structures” that bidders
cannot offer to propose newly
constructed Aeration tanks for Phase
II and Phase III in order to increase
the effective HRT to achieve desired
parameters of BOD< and TSS< 10.
Please confirm.
Inlet to discharge point
6) Volume – 2, Section :
IV, Technical
Proposal
134 Quote: The information request for
in this Technical Schedules should be
filled with clear responses,
information like
‐ “DDE” (During Detailed
Engineering )
‐ , as per manufactures standard ,
‐ “later on detailing” or other similar
meaning works or phrases would
essentially be taken as a non
responsive bid.
As per bid document
Name of work: - Rehabilitation and Up-gradation of Kondli: Phase I (45.5 MLD), Phase II (113.7 MLD) & Phase III (45.5MLD) Wastewater
Treatment Plants (WWTPs) with effluent standards of BOD -10 mg/l, TSS –10 mg/l or better under YAP (III) (Package K3)
Reply to Pre-bid Queries
Page 4 of 14
S.
No. Volume Page Clause
Subject / Particulars as per Bid
Document Bidder’s Queries Reply
Query: We understand that this
stringent condition mentioned of non
responsive bid is applicable for the
Guarantee Schedules only and not for
the technical data sheets wherein a lot
of detailed engineering and
exhaustive information is sought.
You will appreciate that at the
bidding stage it is feasible to provide
only the basic technical details and
we understand that at the bidding
stage documents namely Proposed
Plant Layouts, Process Description,
List of Major Civil Structures, Major
Electro Mechanical Equipments and
Electrical Drive list are needed to be
submitted only.
Please confirm.
7) Volume – 2, Section :
X, Part 2
307 TSS removal Clariflocculator is recommended in
the referred clause for TSS removal.
However, we understand that the
bidder is free to propose any other
process for the TSS removal like
tertiary treatment/disc filter/cloth
filer/ /gravity filter etc. Please
Confirm
As per bid document
8) Volume – 2, Section :
X, Part 4
413 9 Diffuser Clean Water Performance
(SOTR) Testing
Quote: The Engineer shall have the
right to require the Contractor to
carry out Standard Oxygen
As per bid document
Name of work: - Rehabilitation and Up-gradation of Kondli: Phase I (45.5 MLD), Phase II (113.7 MLD) & Phase III (45.5MLD) Wastewater
Treatment Plants (WWTPs) with effluent standards of BOD -10 mg/l, TSS –10 mg/l or better under YAP (III) (Package K3)
Reply to Pre-bid Queries
Page 5 of 14
S.
No. Volume Page Clause
Subject / Particulars as per Bid
Document Bidder’s Queries Reply
Transfer Rate testing of all the
aeration zones. The water depth in
the tank for the tests shall be 6
meters. During the test the contractor
shall demonstrate the guaranteed
maximum and minimum oxygen
transfer rates (SOTR) at the
guaranteed airflows and pressures.
The contractor shall carry out tests
generally as set out in the American
Society for Civil Engineers “Standard
Measurement for Oxygen Transfer to
clean water” Latest Edition.
Query: The tests mentioned to
measure the oxygen tranfer rate to
water are asked to be as per the
American Socity of Civil Engineers.
This clause favours some particular
Diffuser manufacturers and thus
unnecessarily loading the project cost
loading.
We, therefore, request you to delete
the clause and allow manufacturer’s
certification and data from the
operational installations
9) Volume – 2, Section :
X, Part 2
293 &
294
2.10 Type of grit chamber Only Vortex Type Grit Chamber is
envisaged in the bidding documents
while CPHEEO and standard
references like Metcalf Eddy equally
As per bid document
Name of work: - Rehabilitation and Up-gradation of Kondli: Phase I (45.5 MLD), Phase II (113.7 MLD) & Phase III (45.5MLD) Wastewater
Treatment Plants (WWTPs) with effluent standards of BOD -10 mg/l, TSS –10 mg/l or better under YAP (III) (Package K3)
Reply to Pre-bid Queries
Page 6 of 14
S.
No. Volume Page Clause
Subject / Particulars as per Bid
Document Bidder’s Queries Reply
allow Detritor Type and Aerated
Type Grit Chambers also. Also a very
stringent grit removal efficiency of >
95 % for grit greater than150 microns
and > 85% for grit greater than 100
microns is specified in the bidding
documents which is very stringent.
We are enclosing Table 5.18 of
Metcalf Eddy which clearly indicates
a Typical Removal efficiency of
>65% for grit size of 150 microns.
Such stringent condition is favoring
only one foreign make equipment
supplier.
So, we request you to allow Aerated
Type and Detrittor Horizontal Flow
Type grit removal mechanisms in
addition to Vortex Type Grit
Chambers and at the same time relax
the Grit Removal efficiency in
accordance with the standard
reference as enclosed.
Our request should also be
ascertained by the fact that your
tender envisage OPEN
TECHNOLOGY and therefore
restricting grit removal to only
Vortex type would defeat your motto
of OPEN TECHNOLOGY.
10) Volume 2, 702 8.2.1 Sludge Disposal The sludge generated from the As per bid document
Name of work: - Rehabilitation and Up-gradation of Kondli: Phase I (45.5 MLD), Phase II (113.7 MLD) & Phase III (45.5MLD) Wastewater
Treatment Plants (WWTPs) with effluent standards of BOD -10 mg/l, TSS –10 mg/l or better under YAP (III) (Package K3)
Reply to Pre-bid Queries
Page 7 of 14
S.
No. Volume Page Clause
Subject / Particulars as per Bid
Document Bidder’s Queries Reply
Section X,
Part 8
WWTP shall
be disposed of by the contractor to a
proper
landfill site, or other sites as directed
by the
Employer.
Please confirm the following:-
1) Has the landfill site already
identified by DJB?
2) In that case please provide the
distance of Sludge Disposal site from
the STP plant.
This question was raised earlier
during the pre-bid meeting by several
prospective bidders, but was replied
“As per bid document”. This is a
critical issue.
Kindly give descriptive reply.
11) Corrigendum &
Addendum No. 11
4 & 6 S. No. 8 Phosphorus Removal As per your reply, Requirement &
provision of alum dosing is
necessary.
Since desired phosphorus effluent
guarantee can be achieved by BPR
(biological phosphorus removal),
therefore provision of chemical
dosing should not be mandatory for
Chemical dosing is not
compulsory. The bidder
may decide as per his
design
Name of work: - Rehabilitation and Up-gradation of Kondli: Phase I (45.5 MLD), Phase II (113.7 MLD) & Phase III (45.5MLD) Wastewater
Treatment Plants (WWTPs) with effluent standards of BOD -10 mg/l, TSS –10 mg/l or better under YAP (III) (Package K3)
Reply to Pre-bid Queries
Page 8 of 14
S.
No. Volume Page Clause
Subject / Particulars as per Bid
Document Bidder’s Queries Reply
the bidders proposing BPR. Please
confirm.
In the other case if DJB mandatorily
wants provision of alum dosing,
please specify minimum requirement
of alum dosing to bring all the
bidders at par.
12) Volume – 2, Section :
X, Part 2
307 Alum & Polymer Dosing and
Clariflocculator
“Alum and polymer dosing shall be
done before/ at the Secondary
Clarifier for Phosphorous and TSS
Removal. Adequate mixing and
flocculation time to be provided.
Clariflocculator is recommended for
mixing and floc formulation”.
Query :
We understand that tender envisage
open technology and bidders are free
to propose any process to achieve
guaranteed desired outlet parameters
and therefore Alum & Polymer
Dosing should not be binding and
mandatory for the bidders and they
can offer any other alternative
process unit instead of secondary
clariflocculator, provided they meet
the desired outlet standards as
stipulated in the tender. Please
confirm.
Further, we understand that the
Refer reply at S. N. 11
above
Name of work: - Rehabilitation and Up-gradation of Kondli: Phase I (45.5 MLD), Phase II (113.7 MLD) & Phase III (45.5MLD) Wastewater
Treatment Plants (WWTPs) with effluent standards of BOD -10 mg/l, TSS –10 mg/l or better under YAP (III) (Package K3)
Reply to Pre-bid Queries
Page 9 of 14
S.
No. Volume Page Clause
Subject / Particulars as per Bid
Document Bidder’s Queries Reply
design criteria specified for new
secondary clarifier in clause no.
2.18.1, page no. 308 is applicable for
conventional clarifiers only and the
design criteria adopted by bidders
may differ in case they offer high rate
/ advanced / HRSCC clarifiers. Please
confirm.
Bidder 3
13) Volume-1B, Section
III A
104 4.2(a) Eligibility & Qualification Criteria The specific experience requirement
is stated as
The Bidder should have successful
experience in the role of prime
contractor for Design, Construction,
Testing & Commissioning of the
conventional activated sludge process
In
At least 1 (One) Wastewater
Treatment Plant (WWTP) of 120
MLD (or)
At least 2 (Two) Waste Water
Treatment plant (WWTP) of 80 MLD
each (or)
At least 3 (Three) Waste Water
Treatment plant (WWTP) of 60 MLD
each
The above projects should have been
As per bid document
Name of work: - Rehabilitation and Up-gradation of Kondli: Phase I (45.5 MLD), Phase II (113.7 MLD) & Phase III (45.5MLD) Wastewater
Treatment Plants (WWTPs) with effluent standards of BOD -10 mg/l, TSS –10 mg/l or better under YAP (III) (Package K3)
Reply to Pre-bid Queries
Page 10 of 14
S.
No. Volume Page Clause
Subject / Particulars as per Bid
Document Bidder’s Queries Reply
commissioned in last Ten (10) years
as on date of submission of Bids
We would like to draw your kind
attention on qualification Criteria of
similar past tenders of DJB:-
1 STP of Maximum Capacity ranging
from 55% -60% OR
2 STPs of Maximum Capacity from
38% - 40% OR
3 STPs of 27%-30% of the proposed
capacity of the Plant.
As the scope of works include
Rehabilitation & Up-gradation of
Phase I (45.5 MLD), Phase II (113.7
MLD), Phase III (45.5 MLD) the
maximum capacity of a single plant is
113.7 MLD only.
Therefore request you to kindly
consider one plant of capacity 100
MLD
In JV Clause, each partner should at
least have an experience of 60 MLD
using conventional activated sludge
process :-
Name of work: - Rehabilitation and Up-gradation of Kondli: Phase I (45.5 MLD), Phase II (113.7 MLD) & Phase III (45.5MLD) Wastewater
Treatment Plants (WWTPs) with effluent standards of BOD -10 mg/l, TSS –10 mg/l or better under YAP (III) (Package K3)
Reply to Pre-bid Queries
Page 11 of 14
S.
No. Volume Page Clause
Subject / Particulars as per Bid
Document Bidder’s Queries Reply
As the project doesn’t specify any
particular technology, request you to
consider the bidder with PQ on any
aerobic growth process for “At least
one WWTP of 60 MLD” for each
partner in case of a JV
Based on these points, The requested
modifications are as follows,
The Bidder should have successful
experience in the role of prime
contractor for Design, Construction,
Testing & Commissioning of the
conventional activated sludge process
In
At least 1 (One) Wastewater
Treatment Plant (WWTP) of 100
MLD (or)
At least 2 (Two) Waste Water
Treatment plant (WWTP) of 80 MLD
each (or)
At least 3 (Three) Waste Water
Treatment plant (WWTP) of 60 MLD
each
The above projects should have been
Name of work: - Rehabilitation and Up-gradation of Kondli: Phase I (45.5 MLD), Phase II (113.7 MLD) & Phase III (45.5MLD) Wastewater
Treatment Plants (WWTPs) with effluent standards of BOD -10 mg/l, TSS –10 mg/l or better under YAP (III) (Package K3)
Reply to Pre-bid Queries
Page 12 of 14
S.
No. Volume Page Clause
Subject / Particulars as per Bid
Document Bidder’s Queries Reply
commissioned in last Ten (10) years
as on date of submission of Bids
14) Volume-1B, Section
III A
105 4.2(c) Eligibility & Qualification Criteria The specific experience requirement
is stated as
The Bidder should have experience in
the role of prime contractor for
Rehabilitation or Up-gradation of
clarifiers or aeration unit and
digesters or gas holders for at least
one Wastewater Treatment Plant
(WWTP) of 60 MLD or above
capacity.
The above projects should have been
commissioned in last Ten (10) years
as on date of submission of Bid.
Since the rehabilitation can have any
combination of process units, we
request you to consider any of these
components for PQ
Based on this, The requested
modifications are as follows,
The Bidder should have experience in
the role of prime contractor for
Rehabilitation or Up-gradation of
clarifiers or aeration unit or digesters
As per bid document
Name of work: - Rehabilitation and Up-gradation of Kondli: Phase I (45.5 MLD), Phase II (113.7 MLD) & Phase III (45.5MLD) Wastewater
Treatment Plants (WWTPs) with effluent standards of BOD -10 mg/l, TSS –10 mg/l or better under YAP (III) (Package K3)
Reply to Pre-bid Queries
Page 13 of 14
S.
No. Volume Page Clause
Subject / Particulars as per Bid
Document Bidder’s Queries Reply
or gas holders for at least one
Wastewater Treatment Plant
(WWTP) of 60 MLD or above
capacity.
The above projects should have been
commissioned in last Ten (10) years
as on date of submission of Bid.
15) Volume – 2, Section :
X, Part ‐ 2
298 &
299
2.16 Bio Reactor – Phase II and III As per NIT, for Phase II and III,
existing bioreactor has to be
rehabilitated with IFAS technology.
The sizes of existing bioreactor
provided as ;
Phase II – 90 m x 44 m x 3.5 m
(L.D) – 2 Nos
Phase III – 116 m x 16 m x 3.8 m
(LD) – 2 Nos.
Liquid depth of bioreactor in phase II
and III is 3.5 m and 3.8 m
respectively. Due to lesser liquid
depth, the oxygen transfer efficiency
will be lower and required larger
blower capacity.
Please clarify whether bidder can
demolish the existing bioreactor and
construct a new bioreactor with
increased depth.
Refer reply at S. N. 5
above
16) Volume – 2, Section : 292 2.9 Coarse or Medium and Fine screen As per NIT, for phase I separate As per bid document
Name of work: - Rehabilitation and Up-gradation of Kondli: Phase I (45.5 MLD), Phase II (113.7 MLD) & Phase III (45.5MLD) Wastewater
Treatment Plants (WWTPs) with effluent standards of BOD -10 mg/l, TSS –10 mg/l or better under YAP (III) (Package K3)
Reply to Pre-bid Queries
Page 14 of 14
S.
No. Volume Page Clause
Subject / Particulars as per Bid
Document Bidder’s Queries Reply
X, Part ‐ 2 channel Screens and Grit chamber to be
provided and combined screens and
grit for Phase II & III.
Please clarify, whether screen and
grit chamber can be combined for all
three phases.