raw water treatment plant, dm water, …

REPLIES TO PRE BID QUERIES -LOT 3 Date 12.01.2021

NIT No. PNMM/PC-150/E/4004/NCB Dated 16.10.2020

RAW WATER TREATMENT PLANT, DM WATER, CONDENSATE POLISHING UNIT, EFFLUENT TREATMENT PLANT WITH ZLD & SEWAGE TREATMENT

PLANT AT TALCHER, ODISHA (INDIA) FOR TALCHER FERTILIZERS LTD. (TFL) AT TALCHER, ODISHA

Sl. No.

Reference of Tender Document Bidder’s Query Owner /PDIL Reply

SEC NO. Page No.

Clause No. Subject/ Requirement

1. PC150/E/4004/SEC-VI-3.0 (PART-A)-5.4 PC150/E/4004/PVIB/ SEC-11

SHEET 7 of 102 86 & 87 of 92

1.0 Vendor List -DCS

OPTION 1 DCS based control system for Control & ESD function also with applicable redundancy as specified in this tender. This control system will accommodate all control/trip and monitoring signal/ functions. One redundant controller with I/O cards (redundant cards to be considered only for closed loops signals) for control & monitoring application and one separate redundant controller with redundant I/O cards for trip/shutdown functions. Scan time of the controllers shall not be more than 250 msec. Control system for WTP/DM plant shall be placed in CR. (Detail specification of DCS shall be share with the bidder on later stage.

Bidder proposes in-house manufactured Valmet DNA DCS based control system meeting specification requirements for control of various equipments in bid package. This system is manufactured by BHEL at Electronics Division, Bangalore under collaboration with Valmet Automation, Finland. It is a proven system being supplied in power plants up to 800 MW and implemented as part of OEM proprietary standard.

Kindly follow Tender requirement. As per NIT

2.

PC150/E/4004/SecVI-5.3

(PART-A)/ Technical Specification UPS

system

Sheet 3 of 11

4.3 The UPS shall have Redundant Scheme with Bypass. Under normal operating conditions, both inverter units should run in parallel sharing 50% load in synchronism with by-pass power and supply uninterrupted A.C. power to load.

Bidder understands that two separate redundant UPS with 1X100% configuration is required. Clarification only.

The UPS shall have Redundant Scheme with Bypass. Each UPS shall be of 1 x 100% configuration.

3. PC150/E/4004/SecVI-5.3

(PART-A) / High Voltage Frequency

Drive

14 of 15 6 Variable Frequency Drive INSPECTION, TESTING AND ACCEPTANCE All Routine & Type Tests shall be conducted as per the NIT for HV variable frequency drive 6-81-1050 as per IEC 61800-2. However, combined test for VFD and motor at vendor's works shall be carried out if specified in the datasheet.

Combined testing of VFD & motor at Motor Vendor's work not envisaged. Clarification only.

Combined testing of VFD & motor at Motor Vendor's work shall be considered.

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4. PC150/E/4004/SEC-VI-

3.0 (PART-A)-5.4

SHEET 93 of 102

Annexure ‐ 3

SYSTEM CONFIGURATION

Printers 1 Nos A3 Heavy duty Colour HP make Laser printer 1 Nos A4 Black and White HP make Laser printer (All printers shall have wireless facility) Required furniture of GODREJ make shall be considered in the offer.

All sub vendor items like Printers & furniture shall be sourced from BHEL approved vendors. Clarification only.

Kindly follow Vendor list as per Tender requirement. Vendor list as per NIT.

5. GENERAL Codes & standards Codes and standards for valmet DNA based control system, shall be as per product standard. For Instrumentation sub-systems and other equipments/sub-systems shall be as per approved Vendor Standard. Details will be furnished during detailed engineering as required basis / as applicable.

Refer Instrumentation codes and practises mentioned in the Tender.

6. GENERAL Inspection & Testing For BHEL make Plant DCS, FAT shall be carried out on basis of BHEL’s well established FAT procedures. The same shall be discussed during detailed engineering. However, any special Tests / Type tests are NOT envisaged.

ReferPC150/E/4004/SEC-VI-3.0 (PART-A)-5.417.0 FAT/SAT .The same to be followed a minimum.

7. GENERAL Interface with existing plant PLC/DCS

These interfaces will be on OPC Protocol as per BHEL EDN standard practice. Any modification in customer's existing plant PLC/proprietary and off-site control system or existing hardwired or softlink communication shall be in customer's scope.

Foreign device interface shall be dual redundant.Bidder to provide necessary interfacing cards in the CR and CCR. All the hardware & software required for the same shall be in bidder scope.

8. GENERAL CONTROL CONSOLES / CABINETS / ENCLOSURES

Valmet DNA panels shall be manufactured in-house, in line with our well established factory procedures. No separate marshalling panels are envisaged and field termination is at TBs at rear of each system cabinet. This is also in line with the Valmet DNA system supplied for all other similar application projects. Panel dimensions shall be as per BHEL standard. Panel internal components, material, wiring, termination, earthing, fasteners/bolts, Panel dimension etc shall be as per BHEL well established standard. Panels painting process shall be in line with factory standards enclosed (ED 049 00 91 Rev 09). Paint color shall be as per specification.

Kindly follow Tender requirement regarding consoles, cabinets etc.

9. GENERAL Sub-Vendor List All sub vendor items like cables, HMI etc. shall be sourced from BHEL approved vendors, in line with the process requirements. The same

Kindly follow Vendor list as per Tender requirement.

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shall be further discussed & submitted during detailed engineering for Owner's approval.

10. GENERAL MAINTENANCE TOOLS AND TACKLES

Maintenance Tools and tackles are not applicable for the offered VlametDNA based system and hence not envisaged/included in the offer.

Control system to be provided as per Tender condition.

11. GENERAL Vendor List for C & I Equipment Required C & I Equipment will be procurred from the BHEL - EDN Approved Vendors.

Kindly follow Vendor list as per Tender requirement.

12. GENERAL Instrumentation Cables Instrumentation cable for signal connection shall be as per our standard (due to low voltage applications) i.e., 0.8 mm dia, 0.5 sqmm/ 600 Volt grade 70 deg.C rating with stranded copper conductor (7/0.3, 0.5 sqmm), PVC insulated, overall shielded, PVC FRLS outer sheath, un-armoured.

Kindly follow Tender requirement regarding Instrumentation cables.

13. GENERAL Wiring, Termination and Ferruling

Panel internal wiring/termination/ ferruling shall be as per BHEL standard.

Kindly follow Tender requirement regarding wiring, termination& feruling.

14. GENERAL SOE and annunciation system Both SOE and Alarm system are realised integral to ValmetDNA system. SOE/Alarm summary displays shall be available on operator CRTs. Conventional Hardwired window facia for alarms and PBs for silence/ acknowledgement/reset and lamp test are not envisaged.

Kindly follow Tender requirement regarding SOE & annunciation system.

15. GENERAL Power supply concept At the ValmetDNA panels level, 24 V DC shall be derived using power supply converter modules in 1:1 redundant configuration. MI CRTs shall operate on 230/110 V AC single supply derived from UPS source.

Kindly follow Tender requirement As per NIT

16. GENERAL Data bus cable media All network cabling shall be Ethernet UTP cables/FO cables. Cablesupto 1 km ,UTP cable shall be used and above this FO cable shall be considered.


17. GENERAL Inspection and Tests FAT Any special Tests / Type tests are NOT envisaged. FAT shall be carried out on basis of BHEL’s well established FAT procedures.


18. GENERAL Lab Equipment Supply of Lab equipment not envisaged as no list has been provided along with tender documents.

Please refer Section-VI-1-3.1.6 of Part-A of this tender, page 6 of 7.

19. PC150/E/4004/SEC VI-5.5 (PART A & B)

6/202 1.1 Soil Investigation Please furnish the Topo survey, soil investigation report and foundation recommendations.

Topographical report shall be provided. Geo-technical report shall also be provided.

20. PC150/E/4004/SEC VI-5.5 (PART A & B)

7/202 1.2.1 Site Conditions Customer to provide the details of underground obstructions and any relocations in the project area.

As per the information available, no underground obstruction should be encountered. However, if found in future, then provisions of NIT shall be followed.

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21. PC150/E/4004/SEC VI-5.5 (PART A & B)

7/202 1.3 Grading Kindly furnish the topography survey showing contour level & FGL of proposed area. Only micro grading of ± 300mm is in bidders scope.

OK. Shall be provided.

22. PC150/E/4004/SEC VI-5.5 (PART A & B)

7/202 1.4 Disposal of surplus earth Surplus earth is assumed to be disposed off within a maximum of 1km from site. Customer to furnish observations on aforementioned assumptions.

Bidder to visit the site and gather such information before bidding.

23. PC150/E/4004/SEC VI-5.5 (PART A & B)

8/202 1.10 Roads , Paving , drains , sewerage and other facilities.

Bidders scope is limited only up to Battery Limit only Customer to confirm the same.

OK. Confirmed.

24. PC150/E/4004/SEC VI-5.5 (PART A & B)

12/202 3.0 CONSTRUCTION of Rain water harvesting

Customer to provide the specification of Rain water harvesting, layout and total pits required.

This shall be in LSTK contractor’s scope- as per standard practice through recharge pits.

25. PC150/E/4004/SEC VI-5.5 (PART A & B)

25/202 2.2.5 Site Planning & Landscaping Customer to confirm the requirement of landscaping. If it is applicable the specification and total area requirement. Incorporated in landscape treatment. Necessary water supply / sprinklers shall also be provided. Detailed specification shall be provided.

General landscaping shall be provided as mentioned in NIT. For Control room and substation buildings, paving shall be done upto 3 m all around the buildings. After that, landscaping with water sprinklers can be provided. Also RCC approach road to be provided by the bidders. This shall be clarified in Amendment.

26. PC150/E/4004/SEC VI-5.5 (PART A & B)

Finished Floor Level (Plinth FFL)

Top level of approach road + 450 mm from surrounding ground level.

Ok.

27. PC150/E/4004/SEC VI-5.5 (PART A & B)

37/202 4.0 ARCHITECTURAL TRADES Customer to finalize the finishes before the submission of price only. Any changes in the finishes in the later stage may have the commercial implications.

All finishing items have been clearly mentioned in NIT and Vendor list. However, Revised Vendor list with some modifications shall be provided through amendment.

28. PC150/E/4004/SEC VI-5.5 (PART A & B)

63/202 2.14 2.14 REMOVAL / REROUTING OF OBSTRUCTIONS

Please furnish the details and drawings of facilities to be dismantled, rerouted, relocated etc.

Almost all the dismantling and demolition work has already been done by the Owner. So far, no underground structures are foreseen. However, if any underground obstruction is found in future, then NIT provisions shall be followed.

29. General

GROUND TOPOGRAPHY

Filling and Grading in the proposed areas shall be carried out using locally available soil. Customer may pl. confirm the same

Yes, Filling and Grading in the proposed areas may be carried out using locally available good earth. However, graded land shall be provided to the bidders. Only micro grading is in bidder’s scope.

30. General Standard civil drawings Customer to arrange the Standard civil drawings and standard specification for the all architectural finishes and for this project.

Standard civil drgs shall be submitted by the successful bidder at the time of detail engg. for approval. For the all architectural finishes, kindly refer vendor list.

31. General Site Levels Please furnish the Finished ground level, Finished floor level and road levels to be followed in the project.

OK. Land development drg shall be provided.

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32. General Boundary Wall & Fencing As per the drawing PC009-0000-0001 there is no requirement of Boundary and fencing wall. Customer to confirm the same .If is required Customer to provide the provide the details of the boundary wall in the layout drawing.

No boundary wall or fencing is required. Only ETP tank shall be provided with steel hand railing/steel barrier.

33. General Ground Improvement Customer to confirm the requirement of ground improvement for the structures to be done. Please provide the necessary details of the same.

Bidder to visit the site, survey and conduct soil investigation and find out themselves.

34. Battery limit We are assuming that the Battery limit for the scope mentioned is for example Raw water storage is 280M x270M and similarly for other areas also the mention dimensions in the drawing PC009-0000-0001 shall be considered. Bidder shall be providing the Roads, Paving, drains, sewerage and other facilities are limited to these Battery limit only. Customer to Confirm the same.

Confirmed

35. Levelled land Customer to provided levelled land without any obstruction like trees , roots, vegetation and other any existing facilities inside the project area.

Graded and levelled land shall be provided to the bidder. Tree cutting has already been done by the Owner. Only Micro grading, as required, shall be done by the Contractor.

36. PC150/E/4004/SecVI-5.3 (PART-A)

7/83 1.2.2 Public Address System for Plant and Interface & Seamless Integration of same with Owner’s Public Address System.

Customer to furnish the details make, model and schematic and confirm regarding availability of IO cards for interfacing of New system with existing system.

The details make, model and schematic and confirm regarding availability of IO cards for interfacing of New system with existing system shall be provided during detail engineering.

37. PC150/E/4004/SecVI-5.3 (PART-A)

7/83 1.2.2 Fire Detection & Alarm System for Plant and Interface & Seamless Integration same with Centralised Fire Detection & Alarm System.

Customer to furnish the details make , model and schematic.

Details make, model and schematic shall be provided during detail engineering.

38. PC150/E/4004/SecVI-5.3 (PART-A)

8/83 1.4 Additional feeders in 3.3 kV Switchboard / 415 V Switchboards / UPS Distribution Board of Raw Water Treatment Plant Substation for Owner’s use

We have considered the Feeders only. Cables for the same is not considered. Please confirm.

Noted

39. PC150/E/4004/SecVI-5.3 (PART-A)

9/83 1.6 Normal power supply shall be tapped from 2 Nos. 11KV feeders at Owner’s Offsite & Utilities Substation and further distribution shall be in LSTK Contractor’s scope.

Customer to furnish Route length. Owner offsite & utility substation is marked in layout. Bidder shall consider maximum route length.

40. PC150/E/4004/SecVI-5.3 (PART-A)

9/83 1.6 Emergency power supply shall be tapped from 1 Nos. 11KV feeders (Emergency Bus) at

Customer to furnish Route length. Owner offsite & utility substation is marked in layout. Bidder shall consider maximum route length.

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Owner’s Offsite & Utilities Substation and further distribution shall be in LSTK Contractor’s scope.

41. PC150/E/4004/SecVI-5.3 (PART-A)

11/83 3.0 Protection for outgoing feeder of 11 kV Switchboard at Offsite & Utilities Substation to LSTK Contractor Switchboard (Inter tripping, Cable Protection etc.)

Customer to furnish the details make, model and schematic.

Details make, model and schematic shall be provided during detail engineering.

42. PC150/E/4004/SecVI-5.3 (PART-A)

22/83 5.1.2 2 Nos. Separate substation shall be provided for Raw Water Treatment Plant and DM Water Plant & CPU Plant. Tapping of power among these substations shall be in scope of LSTK Contractor.

Customer to clarify the following. 1. One no substation for Raw Water

Treatment Plant. 2. One no substation for DM &CPU plant.

Bidder understanding is correct.

43. PC150/E/4004/SecVI-5.3 (PART-B)

21/83 5.1.1 2 Nos. 11 kV Feeders and 1 No. 11 kV Feeders (Emergency Bus) shall be made available in 11 kV Switchboard at Offsite & Utilities Substation. Tapping of power supply from 11 kV Switchboard at Offsite & Utilities Substation

Customer to provide clarity. Customer is providing separate Feeders for ETP and STP plant. Please confirm.

2 Nos. 11 kV Feeders and 1 No. 11 kV Feeders (Emergency Bus) shall be made available in 11 kV Switchboard at Offsite & Utilities Substation for ETP and STP plant shall be provided. Necessary Further distribution to be done by Bidder.

44. PC150/E/4004/SecVI-5.3 (PART-B)

21/83 5.1.2 Substation shall be provided for ETP & STP.

Customer to clarify the following. One no. substation for ETP and STP Plant


45. PC150/E/4004/SecVI-5.3 (PART-B)

21/83 5.1.3 Emergency power supply shall be tapped from 2 numbers of feeders (of required voltage level) at Owner’s Offsite & Utilities Substation and further distribution shall be in LSTK Contractors scope.

i.) Please furnish the details and Route length and Voltage level.

ii.) Also, Customer to clarify that In Part A of tender ,2 Nos. 11KV feeders and 1 Nos. 11KV feeders (Emergency Bus) is being provided by customer.

iii.) For Part B of the tender 2 Nos. 11 kV Feeders and 1 No. 11 kV Feeders (Emergency Bus) is being provided by customer.

iv.) Also,, Emergency power supply shall be tapped from 2 numbers of feeders (of required voltage level) at Owner’s Offsite & Utilities Substation. Please clarify.

i) Emergency power shall be provided at 11kV voltage level. Location of the substation marked in the plot plan. Bidder to finalise the route and length.

ii) Noted

iii) Noted

iv) Noted

46. PC150-TS-0805 PC150/E/4004/SecVI-5.3 (PART-A)

pg no 4 of 17 pg no 44 of 83

cl no 5.2 Cl no9.4.6

The Switchboards shall be in fixed/draw out, single front execution

Other than Incoming ,Buscopuler other outgoing feeders We are proposing LT switchgears (PMCC,MCC, ACDB , DCDB) with double front consturction as it will reduce the size of the panel. Kindly review.

As per NIT Double Front construction may be accepted to reduce the size of panel. Amendment to be issued.

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47. PC150-TS-0805 PC150/E/4004/SecVI-5.3 (PART-A)

pg no 4 of 17

cl no 5.1.2 The complete assembly shall be dust, damp and vermin proof having minimum degree of protection equivalent to IP-52 as per IS/IEC:60947.

Degree of protection shall be IP 52 for ≤1600A and IP 42 >1600A.

As per NIT

48. PC150/E/4004/SecVI-5.3 (PART-A)(Design Philosophy -Electrical)

pg no 43 of 83

Cl no 9.4.4.13 Motor feeders 75 KW & above, shall be ACB controlled with combined motor protection relay.

We are proposing motor feeders 110 KW and above shall be ACB controlled . Kindly review.

As per NIT


pg no 43 of 83

Cl no9.4.4.13 more than 400A, ACB shall be provided

We are proposing outgoing feeder with ACB for 630A and above rating . Kindly review.

As per NIT


pg no 44 of 83

Cl no9.4.4.27 Electronic Digital Motor Protection Relay with built-in Earth Fault, Overload, Stalling, Single phase protection, etc. Thermal Overload Relay are not acceptable

In design Philosophy it is mentioned Electronic Motor Protection relay to be considered, Thermal OLR not acceptable . Whereas in MV switchgear spec It is mentioned Thermal OLR . Kindly clarify the requirement

Design philosophy shall be followed.

51. PC150-TS-0805 pg no 11 of 17

cl no 6.6 The contactor shall be provided with three pole bimetal thermal overload relays, unless other-wise specified

Bidder query is missing

52. PC150-TS-0805 pg no 7 of 17

cl no 5.7 A continuous earth bus of electrolytic grade copper, running along the entire length of the lower part of the switchboard shall be provided

We shall be proposing earth bus with GI/AL having minimum 50X6 sq mm cross section. Kindly accept

As per NIT

53. PC150/E/4004/SEC-VI-11A

pg no 27 of 89

VENDOR LIST for 415 V SWITCH BOARD(PCC/MCC/PMCC)

In addition to vendors indicated in tender specification, kindly accept BHEL –EPD for LV Switchgears Boards.

As per NIT

54. PC150/E/4004/SecVI-5.3 (PART-A) Rev 00

pg no 43 of 83

Cl no9.4.4.25 All low voltage switchboards shall be provided with 20% spare outgoing feeders or minimum one of each rating (fully wired) and with all the components

20% or min 1 no. spare feeders for outgoing feeders as below: 1. No spare feeders shall be provided for Incomers/Bus coupler/Bus & Line PT/ CST modules for all PMCC/MCC/ACDB /DCDB. 2. Breaker (ACB) controlled Motor Feeder & O/Gs Feeder to other MCC/ACDB shall be provided 20% or min 1 no. spare feeders (Except DG TIE feeder). 3. Supply feeders shall be provided based on SFU, MCCB, MPCB rating 20% or min 1 no. spare feeders. 4. Bidirectional

As per NIT

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motor feeder: Spare feeders based on physical size of the module 20% or min 1 no. spare feeders. 5. Unidirectional motor feeder: Spare feeders based on Type & rating of the module 20% or min 1 no. spare feeders.

55. PC150/E/4004/SecVI-5.3 (PART-A),rev 00(Design Philosophy)

pg no41 of 83

Cl no 9.4.1.58 All 11kV, 3.3. kV and 415 V Switchboards shall preferably be of same make for ease of operation & maintenance

Make of Switchboards may be different on different voltage level due to manufacture constraint in the market. Please review the same. 415V Switchboards shall be BHEL- EPD Make

As per NIT

56. PC150/E/4004/SEC-VI-3.0 (PART-A)-5.4

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1.00

Common DCS/PLC has been considered for WTP package and bidder to ensure segregation of individual plant level signals at AI/AO/DI/DO card level so as to ensure the reliability of the system.

Bidder's understanding is that DCS/PLC shall be common for RWTP, DMWP & CPU and segregation of IOs shall be

It is to be clarified again that control system will accommodate all control/trip and monitoring signal/functions for Raw water pre-treatment plant (RWPT), DM plan, Condensate polishing unit and drinking water. And Separate redundant controller of the same PLC make & model as offered in the part A of tender, cabinets, consoles, I/O and HMI shall be considered for the ETP plant

57. PC150/E/4004/SEC-VI-3.0 (PART-A)-5.4

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1.00

The control room shall have console area, engineering room, equipment/rack room, 2 nos. Manager room, 1 no. supervisor room, UPS, battery, meeting room, pantry room, ladies and gents toilet as minimum.

Location of Control room is not identified in the "Plot plan of proposed integrated coal based fertilizer and chemicals complex (Dwg. No. PC009-0000-01)". Please confirm the location of Control room.

Single control room is envisaged for DM_ETP_RWTP_STP unit. The locations to be proposed by Bidder as per overall plot plan in DM plant area .The same to be finalised after Owner’s approval.

58. PC150/E/4004/SEC-VI-3.0 (PART-A)-5.4

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1.00 CCR operator room

Location of Control room is not identified in the "Plot plan of proposed integrated coal based fertilizer and chemicals complex(Dwg. No. PC009-0000-01)". Please confirm the location of CCR Operator room.

Single control room is envisaged for DM_ETP_RWTP_STP unit. The location to be proposed by Bidder as per overall plot plan in DM plant area .The same to be finalised after Owner’s approval.

59. PC150/E/4004/SEC-VI-3.0 (PART-A)-5.4

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2.00

DOCUMENTATION 1.List of Instruments (tag wise) indicating type of Instrument, make, model no., quantity etc. 3.Instrument layout drawings. 4.Catalogue of Instruments & System 5.List of spares (item wise and quantity) for Commissioning and 2 years of operation. 6.Specification of Instruments

All the documents listed shall be submitted after order placement. Customer to confirm.

Noted.

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8.P and I Diagram 9.I/O list 11.Logic Diagram for interlock & safety (if any) 15.Vendor to indicate power requirement (if any) for the control system 16.Other documents necessary to have a clear understanding of the system. 17.List of alarms 18.Schematic drawings for controls 19.Control Room Layout 20.Field Operator Room layout. 21.System Architecture 22.Instrument Air Consumption Requirement 23.UPS power & Heat Load Requirement. 24.Bill of Material.

60. PC150/E/4004/SEC-VI-3.0 (PART-A)-5.4

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2.00 Field operator room.

Location of Field operator room is not identified in the "Plot plan of proposed integrated coal based fertilizer and chemicals complex (Dwg. No. PC009-0000-01)". Please confirm the location of Field operator room.

The same to be finalised during detail engineering

61. PC150/E/4004/SEC-VI-3.0 (PART-A)-5.4

380 of 3554 387 of 3554

3.34 7.1

Analyzer

As per CL. 3.34, all Analysers shall be Ex.proof irrespective of area of installation. And as per CL.7.1 all liquid analysers shall be of intrinsic safe design suitable for execution class specified for the area. Customer may please confirm the whetheranalyzers shall be of Ex.proof or intrinsic safe.

Liquid analysers shall be of Intrinsic safe design.

62.

SECTION – VI 12.0 (PART-A) INFORMATION REQUIRED IN TECHNICAL PROPOSAL

2012 of 3554

11.0

Details of Instrumentation System including the proposed models etc. as also details of the proposed control systems (DCS) Safety Interlock and Trip system shall be enclosed. A list of all control valves with purchase specifications, material of construction, codes/standards used shall be enclosed. Instrumentation Control Philosophy, Logic Diagrams & Safety valve Specifications shall also be enclosed.

All the mentioned details shall be submitted after order placement. Customer to confirm.

Noted.

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63.

SECTION – VI 1.0 (PART-A) PC0150/E/4004/SEC-VI-1.0A

Page 324 of 3544

3.0

PLANT CAPACITY & CONFIGURATION

Please provide Water balance diagram for the total plant.

Bidder to use information provided in NIT.

64.

SECTION – VI 1.0 (PART-A) Annexure II PC150-7318-024 REV 0

Page 333 of 3544

Annexure II

Polished water storage tank Polished water after Mixed Bed Exchanger is stored in a Polished water tank. Please confirm it is the same DM tank used in DM Plant. And the location of this tank is in DM plant area. Also, please indicate the proposed location of CPU plant.

Confirmed. Bidder to optimize & proposed CPU plant location within allotted 170 m x 80 m plot for DM water plant.

65.

SECTION – VI 2.0 (PART-A) PC150/E/4004/SEC-VI- 2.0A

Page 339 of 3544

2.0 2.1

Drinking water Quality The filtered water after Dual Media filters shall be fed to Filtered water storage tank. A part of filtered water shall flow directly from outlet of DMF to Drinking water storage tank. However, Quality required in clause 2.0 for filtered water and clause 2.1 are different. Since there is no treatment envisaged separately other than chlorination. Both these quality parameters should have been same.

Drinking water quality shall meet latest BIS relevant standards or as per table 2.1 given in Document PC150/E/4004/SEC-VI- 2.0A whichever is more stringent.

66.


Page 339 of 3544

2.0 2.1

Drinking water Quality Please confirm if Drinking water quality shall confirm as per BIS 105000 or as per table 2.1 given in Document PC150/E/4004/SEC-VI- 2.0A.

Drinking water quality shall meet latest BIS relevant standards.

67.


Page 490 of 3544

2.1 Design Basis Space for processing approx. 600 m3/hr of raw water to be provided in the layout considering future provision. Please indicate the required area.

Bidder to optimize & indicate future provision within allotted 190 m x 100 m plot for Water Treatment Plant.

68.

SECTION – VI 2.0 (PART-A) PC150/E/4004/SEC-VI- 2.0B

Page 2043 of 3544

1.1 Feed Effluent Quality 1. Please indicate the resultant feed effluent quality (in equalisation tank) to be treated further.

2. Indicate the capacity of ZLD plant.

1. To be calculated by bidder and submit with bid. 2. As per NIT

69. PC150/E-4004 VI-11.0 VENDOR LIST BHEL approved Vendor list and BHEL make

Equipment / items to be accepted by customer As per NIT.

70. PC150/E/4004/SEC-VI-3.0 (PART-A,B)

Documentation All the documents listed shall be submitted after order placement. Customer to confirm.

Bidder to submit all necessary documents along with bid for better understanding. As per NIT.

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REPLIES TO PRE BID QUERIES -LOT 3 date 12.01.2021 NIT No. PNMM/PC-150/E/4004/NCB Dated 16.10.2020 RAW WATER TREATMENT PLANT, DM WATER, CONDENSATE POLISHING UNIT, EFFLUENT TREATMENT PLANT WITH ZLD & SEWAGE TREATMENT PLANT AT TALCHER, ODISHA (INDIA) FOR TALCHER FERTILIZERS LTD. (TFL) AT TALCHER, ODISHA

Sr No

Sec No Page No

Clause No

Subject Bidder’s query Owner's reply

1 PC150/E/4004/SEC-VI- 3.0A

4 of 10 1.0 General

f) Three (3) (2W+1S) nos. Mixed Bed exchanger along with 2 nos. blowers with all accessories.

1) Please clarify the quantity of MB air blower, 3 nos or 2 nos. 2) Please clarify the whether Air blower are common for MB exchanger-DM and N-pit or not.

Air Blower For Neutralization Pit: 2(1W+1S) Separate Air Blower to be considered for Neutralization Pit: (1W+ 1S) Amendment will be issued

PC150/E/4004/SEC -VI-4.0A

21 of 31

Sr No. 12 of clasue no. 3.2

Air Blower For Neutralization Pit/MB: 2(1W+1S)

Schematic flow diagram Chemical dosing for DM & CPU

PFD shows separate air blower for MB and N-pit.

2 PC150/E/4004/SEC-VI- 3.0A

4 of 10 1.0 General

o) One (1) no. of brine preparation tank with injection Pumps complete with all accessories

Please clarify whether Brine preparation tank shall be

provided or not. Please provide data sheet of the same, if

required.

Bidder to decide requirement of Brine preparation tank.

Schematic flow diagram Chemical dosing for DM & CPU

PFD does not show Brine preparation tank.

PC150/E/4004/SEC -VI-4.0A

18 of 31

3.2 In datasheet of DM plant, brine preparation tank are not envisaged.

3 PC150/E/4004/SEC-VI- 2.0A

2 of 8 1.1 Raw water

Total Cations are 159.5 ppm as CaCO3 whereas Total Anions are 125 ppm as CaCO3

In raw water analysis, cation and anion are imbalance. Kindly provide balance analysis for

designing the DM plant.

Treated Raw water will be used for DM plant feed.

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4 PC150/E/4004/SEC -VI-4.0A

27 of 31

4.1 1. Turbidity analyser & pH analyzer at the out let of each dual media filters.

Please reconfirm the requirement of Turbidity analyser & pH analyzer at the out let of each dual media filters or at common outlet main header.

As per NIT

1. PC150/E/4004/SecVI/2.0B

11 of 11

4 Cooling Water Temperature - Design Value Missing.

Request you to confirm cooling water Supply temperature

As per NIT Sec-VI/2.0B table 4.0

2. PC150/E/4004/SecVI/4.0B

18 of 28

43 Evaporator Feed Pump - NW+2S

Since the evaporator system is 1 No.So the feed pump shall also be 1No. So, please confirm if 1 No. standby is acceptable.

Refer Sno. 44, SHEET 18 of 28,

PC150/E/4004/ SEC-VI Part-4.0B

Thermal Evaporator:

Number (Nos of Thermal evaporator

to be decided by bidder with minimum

2 working of same capacities)

Nos. N working (N) with 20%

overdesign on capacity.

No standby envisaged for Thermal

evaporator.

Accordingly Feed pumps shall be NW+1S (minimum 2W+1S) in-line with Thermal evaporator. Amendment will be issued

3. PC150/E/4004/SecVI/4.0B

18 of 28

44 Scope of Cooling Tower

Please confirm whether Cooling water shall be supplied by customer for Thermal Evaporator or Vendor to consider cooling tower in scope of supply.

Cooling water shall be supply/return by customer at one point of battery limit.

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4. PC150/E/4004/SecVI/4.0B

18 of 28

44 Evaporator shall be designed for Continuous operation of 7 Days with Maximum down time of 4 hrs/week.

Please note that given the size of the system, a typical cleaning like Hot water boil out, shall need approx 18 - 24 Hours downtime. We request customer to give vendor the choice of duration of cleaning while vendor to maintain the rated capacity, i.e. vendor to consider excess operating capacity to ensure there is no production loss due to planned shutdown between the cleaning cycles.

As per NIT

5. PC150/E/4004/SecVI/4.0B

19 of 28

45 MOC of Settling Tank/ Crystallizer

Crystallizer shall be handling the highest TDS brine. Suitable MOC shall be SDSS (Super Duplex Stainless steel or Higher such as 6% Moly). We request you to kindly revise the spec considering the requirement.

Crystallizer comprises of Settling tank, Pusher centrifuge, centrate tank and centrate pump. Concetrate from Thermal evaporator will be collected in settling tank (requirement to be decided by vendor), centrate from pusher centrifuge will be collected into centrate tank, which will sent back through centrate pump to Thermal evaporator. CRYSTALLIZER: Number Nos. (NW + 1S) with 20 % overdesign, (Nos of crystallizers to be decided by bidder with minimum 2 working) Settling tank (as required), One (1) No. MOC: SS-316, capacity: as per system requirement Pusher Centrifuge, capacity: as per system requirement with minimum 2

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working, (NW + 1S), MOC: SDSS Mother Liquor tank/Centrate Tank, capacity: as per system requirement, MOC: FRP Mother Liquor tank/Centrate Pump capacity & head: as per system requirement, MOC: SDSS Crystallizer sludge storage shed sufficient for 1 Month storage shall be provided by bidder. Salt from crystallizer shall be Free flowing. Amendment in this regards will be issued.

6. PC150/E/4004/SecVI/4.0B

19 of 28

45 MOC of Pusher Centrifuge

Crystallizer shall be handling the highest TDS brine. Suitable MOC shall be SDSS (Super Duplex Stainless steel or Higher). We request you to kindly revise the spec considering the requirement.

Refer above

7. PC150/E/4004/SecVI/4.0B

19 of 28

45 Metallurgy of Critical Components of ZLD System: 1. Recirculation Ducts 2. Vapor Ducts 3. Recirculation Pumps 4. Vapor/ Surface Condensor 5. Centrate & Centrfiuge Feed Pump

We request you to kindly include the metallurgy of the following important components of Thermal Evaporator 1. Recirculation Ducts: SDSS/6% Moly 2. Vapor Ducts: SS316 3. Recirculation Pumps: CD4MCuN 4. Vapor/ Surface Condensor: SS316 5. Centrate & Centrifuge Feed Pump: CD4MCuN This shall impact the life of the Thermal evaporator system.

As per NIT.

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8. PC150/E/4004/SEC -VI/2.0B

7-8 of 11

1.1h Waste water composition from Gasification Plant, Gasification stream number 5, 19440m3 duration of 10 days,

.The composition provided is majorly of organic load, hence will need prior biological treatment. Client to confirm, whether this average of 81m3/hr for 10 days is to be treated in MBR system. If yes, client to confirm wheather the capacity of the MBR system is to be inclusive of this additional load. Currently as per tender MBR capacity is 155m3/hr, with 3 stream effluents only (process eff. gasification-76m3/hr,process eff. purification-19m3/hr of coal gasification plant and process eff.-60m3/hr of NH3-urea plant.) Also, kindly provide TDS break up of this stream is need for downstream treatment design.

“Waste water composition from Gasification Plant, Gasification stream number 5, 19440m3 duration of 10 day” is intermittent. Regarding quality, data available is already provided in NIT.

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9. PC150/E/4004/SEC -VI/2.0B

8 of 11 1.1h Waste water composition from Gasification Plant, Boilar system & oxygen chemical flush and waste water from Urea unit during start up.

.The composition provided is majorly of organic load , hence will need prior biological treatment. Client to confirm, whether this average of 1.4 m3/hr for 12 days and 36m3/hr for 8 hours is to be treated in MBR system. If yes, client to confirm wheather the capacity of the MBR system is to be inclusive of this additional load. Currently as per tender MBR capacity is 155m3/hr, with 3 stream effluents only(process eff. gasification-76m3/hr, process eff. purification-19m3/hr of coal gasification plant and process eff.-60m3/hr of NH3-urea plant.) Also, kindly provide TDS break up of this stream is need for downstream treatment design.

“Waste water composition from Gasification Plant, Boiler system & oxygen chemical flush and waste water from Urea unit during start up” is intermittent. Regarding quality, data available is already provided in NIT.

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REFERENCE OF TENDER DOCUMENT BIDDER'S QUERY OWNER'S REPLY

SEC.NO.. Page No.

CLAUSE NO. Subject

1 PC-150/E-4004/P-

I/S-IV 64 of 77 57.0

Geotechnical Investigation report

As per the tender the bidder has to carry out the soil investigation, which may take 45 days of time. Request you to kindly carryout the pretender soil investigation and provide the same to all the bidders, which would ensure that all the bidders would be at par.

Soil investigation report of nearby unit shall be provided to be the bidders. However, successful bidder shall conduct his own soil investigation afresh.

2

PC150/E/4004/SEC

VI-5.5 (PART A & B)

6 of 202 1.2 Topographic / Contour survey

As per the referred Clause, it states that Topographical Survey Report is attached and the same is missing in the Tender documents. Kindly, provide the survey report.

Topographical Survey Report provided to be the bidders through amendment.

3

PC150/E/4004/SEC

VI-5.5 (PART A & B)

61 of 202

2.10.1 Storage tank foundation Settlement

Kindly provide the allowable settlement for storage tank with RCC ring wall or with sand pad foundations

The allowable settlement for storage tank with RCC ring wall or with sand pad foundations shall be within permissible settlement limits as determined by soil investigation report, under operating and hydro-test conditions.

4

PC150/E/4004/SEC

VI-5.5 (PART A & B)

48 of 202

2.1.3 Finished Ground level (FGL)

Please furnish the FGL to be maintained inside the proposed treatment plant premises.

Land development drg shall be provided to the bidders.

5

PC150/E/4004/SEC

VI-5.5 (PART A & B)

91 of 202

5.2.1 Design methodology of Liquid retaining structures

As per the referred clause the liquid retaining structures shall be designed as Uncracked section in working stress method as per IS 3370. However IS 3370: 2009 allows for Limit state design of liquid retaining structures with which we can further optimize on the civil quantities. Kindly allow us to adopt the same.

Confirmed.

6

PC150/E/4004/SEC

VI-5.5 (PART A & B)

107 of 202

8.1.7 Wind forces on the pipe rack

As per the referred clause, wind forces on the pipe rack to be increased by 1.25 to 2 times or more based on the width of rack from the actual load as specified in code. Requesting you to allow us to adopt the wind loads as per the codal stipulations alone, so that considerable optimization in the quantities could be achieved. Kindly allow us to adopt the same.

NIT shall be followed.

7

PC150/E/4004/SECVIB- 5.2.1 &

PC150/E/4004/SEC-VI-5.2.3 (PART-

B)

4 of 23 &

38 of 44

1.7 & 6.3

Seismic Zone

The referred clauses falls under the Sections, Static equipment & Piping and it states that “Seismic analysis shall be performed by considering seismic Zone-IV”. We presume that the above condition applies only for the components related to that particular section only and not for the civil supporting structure nor any of the civil / structural designs. We shall be adopting the seismic Zone - III as per IS 1893 for all the civil / structural design of structures, please confirm

ok. Confirmed.

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SEC.NO.. Page No.

CLAUSE NO. Subject

8

PC150/E/4004/SEC

VI-5.5 (PART A & B)

81 of 202

3.8.1 Additional contingency load on floor slab & beams

As per the referred clause, an additional contingency load of 10 kN concentrated load has to be considered for the design of floor slabs & beam. Requesting you to allow us to adopt only the live loads as specified in the same section of tender document page 75 of 202, Cl. 3.3 and also as per IS 875 in case not covered in the section which itself is already on a conservative side. Kindly accept the same to enable us to provide an optimum quote.

Contingency loads are to be applied in the absence of actual loads from vendor data of boiler/ other equipments. For walkways/ operating platforms/ slabs, such loadings shall be considered as per the established engg. Practices. Design shall be according to IS codes. Amendments shall be made.

9

PC150/E/4004/SEC

VI-5.5 (PART A & B)

81 of 202

3.8.1 Load distribution on floor slabs

As a general practice, the dead and live loads on the floor slabs are considered as distributed over 1m x 1m area. But as per the referred clause, the loads has to be considered as distributed over 0.75m x 0.75m area. For example, Live load on operating area 5 kN/m2. Generally it is considered as 5 / (1m x 1m) = 5 kN/m2, but as per the clause it is 5 / (0.75m x 0.75m) = 8.89 kN/m2. Hence it is about 1.78 times higher than the normal loading. Requesting you to kindly allow us to consider as per general engineering practice (1m x 1m area) in order to provide an optimum quote.

OK

10

PC150/E/4004/SEC

VI-5.5 (PART A & B)

86 of 202

4.3.8 Ground water table As per the referred clause, we presume that ground water level shall be considered as per the geotechnical investigation report data. Please confirm.

OK

11

PC150/E/4004/SEC

VI-5.5 (PART A & B)

93 of 202

5.4 Reinforcement bars

As per the referred clause, we presume that corrosion resistant bars are to be used only for the footings and not for the underground parts of column, Walls & base slab of liquid retaining structures etc. Please confirm.

Corrosion resistant bars are to be used for the footings and also for the underground parts of column, Walls & base slab of liquid retaining structures etc. And also for all underground structures. Amendment shall be made.

12 SECTION – VI 1.0

(PART-A) 326 3.1.5 Interconnecting Piping

As per referred clause, “All interconnecting piping, up to Battery Limit shall be provided by the bidder.”

Please confirm the Battery limit list with coordinates, Pipe sizes, Service, Design Parameter such as flow, pressure, temperature for all inlet /outlet lines.

During detail engineering

13 SECTION - VI 1.0

(PART-A) 328 3.1.5) ii

Construction Water Supply facilities

As per referred clause, “Construction water shall be supplied at one point at plant location, bidder to make arrangement for construction water supply from given plant location to bidder plant battery limit on chargeable basis”. Please confirm the Battery limit location with coordinate, pipe size and MOC of construction water.

MOC of pipe shall be IS-1239. Pipe size as per engineering practice. Location of Construction water intake will be shown in Plot plan.

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CLAUSE NO. Subject

14 SECTION - VI 1.0

(PART-B) 2036 3.1.3 Piping termination points

As per referred clause, “All inlet /outlet lines interfacing with client shall be terminated at ETP plant BL by owner. Bidder shall provide double block and bleed valves at BL for all inlet/ outlet lines along with necessary instruments and further piping up to the process units. All effluent lines shall be provided with sample points. Provision for Hook-ups to be provided for future expansion”. Kindly clarify the below points:

1. Please confirm the Battery limit location with coordinate for all inlet /outlet lines.

2. Isolation Ball valve with 1” tapping shall be provided for Sample points for all effluent lines. Please confirm.

3. Confirm the services for which future provision is required and also whether isolation valves are required for the same.

1. Tentative location will be marked in plot plan.

2. Confirmed

3. Future Provision for same type of Effluent. Isolation valves to be provided for the same.

15 SECTION - VI 1.0

(PART-A) 326 3.1.6 Chemical Laboratory

As per referred clause, “In addition to DM Plant and Raw Water Treatment Plant, this comprehensive lab should cater the tests pertaining to following units also…….” We presume that the piping along with pipe supports to chemical laboratory from Steam Generation Plant, water cooling system and any other plant other than RWTP, DM & CPU, and ETP& STP is not in Bidder‟s scope. Please confirm.

No piping from Steam generation plant to chemical laboratory has been envisaged. Lab testing facility for WPT, DM & CPU & ETP will be used for lab testing requirement of Steam generation plant.

16 SECTION - VI 1.0

(PART-B) 2036 3.1.4 Chemical Laboratory

As per referred clause, “A common laboratory for RWTP, DM, CPU, ETP, STP and Steam Generation Plant shall be provided by the Bidder. For details refer Section-VI-1-3.1.6 of Part-A of this tender”.

1. Please confirm whether chemical piping and supports outside the battery limit of RWTP, DM, CPU, ETP, STP is not in bidder‟s scope.

2. We presume that the chemical piping along with supports for Steam Generation Plant is not in Bidder‟s scope. Please confirm.

1. No piping from Steam generation plant to chemical laboratory has been envisaged. 2. No piping from Steam generation plant to chemical laboratory has been envisaged.


(PART-A) 346 1.0/ l Auto Valves

As per referred clause, “All auto valves above 150NB shall be pneumatic operated butterfly valves (Leakage Class IV) except for drain valves on vessels” Please confirm whether the above clause is applicable for RWTP, ETP with ZLD & STP also.

Confirmed

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SEC.NO.. Page No.

CLAUSE NO. Subject


(Part A) 515 7.0 Utility System

Please confirm whether the utilities lines: Nitrogen, Instrument air, LP steam, cooling water, Plant air will be provided at the battery limits of RWTP, DM&CPU Plant, and ETP separately.

Confirmed. All utilities shall be provided in single point at battery limit.


(Part A) 330

Drg.No: PC150-7318-021

Battery Limits at RWTP

As per referred drawing, battery limit demarcation is shown for following lines:

Drinking water line to Plant distribution

Drinking water line Township

Service water for distribution

Cooling tower makeup water for distribution 1) Kindly provide the battery limit coordinate, Pipe sizes, Pipe

MOC, Design Parameter such as flow, pressure for the above services.

2) Battery limit for Raw water from reservoir is not specified in the above clause. However as per SECTION VI -4.0 (PART-A), Clause 2.1, Page no.487 “The Raw water from raw water storage shall be received at RWTP battery limit through a dedicated pipe line @ 2.0 kg/cm2g.” Please confirm that the raw water pipe will be provided to the bidder at RWTP battery limit. Also confirm the battery limit coordinate, pipe size, Pipe MOC.

1. As per NIT, Pipe size will be communicated / finalized during detail engineering Pipe size as per engineering practice.2. Confirmed, Pipe size as per engineering practice.


(Part A) 330

Drg.No: PC150-7318-021

Battery Limits at RWTP

As per referred drawing, battery limit demarcation is not shown for following lines:

DM plant feed pipe from RWTP to DM plant

RO treated water from ETP to Filter water storage tank in RWTP

Chemical dosing lines to DM & CPU Plant, ETP. Kindly confirm whether the interconnecting piping to respective units is in the scope of bidder. If yes, please confirm whether the above lines can be routed underground, except for chemical lines. If pipe routing need to done above ground only, kindly provide the availability and details of OSBL pipe rack / sleeper for us to route the pipes. If the interconnecting piping is not in the bidder‟s scope, kindly provide the battery limit coordinates for termination.

All Effluents, condensates Utilities & Water will be terminated at Battery limit of bidder. However interconnecting piping within different units of WPT, DM CPU & ETP Plant will be under bidder scope.


(Part A) 332

Drg.No: PC150-7318-023

Battery Limits at DM CPU

As per referred drawing, battery limit demarcation is shown for DM / Polished water to coal gas / SGP / Ammonia urea plant. Kindly provide the battery limit coordinate, Pipe size, Pipe MOC, Design Parameter such as flow, pressure for this line. Further, battery limit demarcation is not shown for following lines:

Off-spec Process Condensate to ETP

Effluent line from N-pit to ETP


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SEC.NO.. Page No.

CLAUSE NO. Subject

Service water Kindly confirm whether the interconnecting piping to respective units is in the scope of bidder. If yes, please confirm whether the above lines can be routed underground. If pipe routing need to done above ground only, kindly provide the availability and details of OSBL pipe rack / sleeper for us to route the pipes. If the interconnecting piping is not in the bidder‟s scope, kindly provide the battery limit coordinates for termination.

22 SECTION - VI 1.0

(PART-B) 2040

Drg.No: PC150-7318-046

Battery Limits at ETP with ZLD.

As per referred drawing, battery limit demarcation is shown for all inlet lines to ETP & STP. Kindly provide the battery limit coordinate, Pipe size, Pipe MOC, Design Parameter such as flow, pressure for these lines. Further, battery limit demarcation is not shown for DM/CPU regen waste water. Kindly confirm whether the interconnecting piping to respective units is in the scope of bidder. If yes, please confirm this line can be routed underground. Also please confirm the piping MOC.

Refer above reply.


(Part A) 329

Drg.No: PC009-0000-0001

Pipe rack

We presume that the interconnecting pipe rack near RWTP & DM water plant is not in the scope of bidder. Also please confirm whether the interconnecting piping in bidder‟s scope can be routed in the OSBL pipe rack.



(PART-A) 349 1.0/ xxi.

Treated Sewage Water distribution

As per referred Clause “Piping network to distribute the treated sewage water in the green belt area around the plant area as shown in overall plot plan attached with NIT. Piping material of distribution piping shall be of CPVC.” Please confirm whether CPVC pipe can be used for underground piping network for treated sewage water.

Treated sewage shall be terminated at battery limit by bidder.

25 SECTION – VI 5.2.3 (PART-B)

2185 5.2.5 Steam Trap & Draining Philosophy

As per referred clause “Steam traps discharging to atmosphere shall be connected to storm water drain/storm sewer, in case of open system. In case of condensate recovery, traps shall discharge into condensate header.” Please confirm the type of Steam trap to be used. We propose to drain the steam trap discharge to storm water drain, please confirm.

As per engineering practice.Confirmed.

26 SECTION –VI 4.0:

(PART-B) 2124 5.1 Critical Piping SDSS PMS is not available in the tender, kindly provide the same.

Bidder shall provide SDSS material spec as per engineering standard for Owner/PMC approval after award of Job.

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CLAUSE NO. Subject


(Part A) 512 5.2 PMS for Air Grid Piping Kindly confirm MOC for Air grid piping in N-Pit.

As per NIT

28 Part-VI: Technical

Section 5.1 523 5.0 Corrosion Allowance

As per the referred clause, “the corrosion allowance for Storage Tanks is mentioned as 1.5 mm” and as per clause no- 1.8, page no- 531, SECTION – VI 5.2.1 (PART-A) “the corrosion allowance for carbon steel and low alloy steel pressure parts is 3 mm”. We presume that, Corrosion Allowance for Roof, Shell, Bottom and Annular plates shall be 1.5 mm only. Please Confirm.

As per NIT


(PART-A) 463 -

General Description of scope

As per the referred page, “The material of construction for Foundation of Storage Tanks is RCC” and as per Clause no- 13.1, page no- 773, SECTION – VI 5.3 (PART-A) “The tank bottom shall be provided with impressed current type cathodic protection system” We presume that, Impressed current type cathodic protection system is not required for Tanks with RCC foundation type of structure. Please Confirm.

If the material of construction of storage tank is RCC, then cathodic protection is not applicable. However, for DM water tank and other type of tanks, it may be applicable as mentioned in the NIT.

30

SECTION VI 3.3 (PART-A)

&

(PART-B)

360

&

2067

1.1 GENERAL PIPING SCOPE OF WORK

As per referred clause“The detail scope of work includes such as but not limited to complete management, Design, Detailed Engineering, 3D modelling….”

Please clarify on Scope of 3D modelling & furnish details related to 3D modeling Software along with corresponding 3D modelling specifications

3D modelling software i.e. PDMS or SP3D to be used.

31 SECTION VI 5.3 731 6.0 Air conditioning system

As per the referred clause, Kindly provide the type of air conditioning system to be provided, Working and Standby requirement, and temperature to be maintained for Substation, control room, and other premises. Also provide the detailed technical specification.

Bidder to refer Clause 3.5 at pg 561 Clause 6.21 at pg 732. Bidder to select suitable HVAC system based upon their previous similar executed system in compliance with ASHRAE/ISHRAE latest standards.

32 - - - Firefighting system

Kindly clarify the following:

Scope of Fire water sump & pump house. If the same is in bidder‟s scope, please provide the details like sump location, volume, pump type, etc

If fire water line is provided by client at battery limit, then provide the pipe size, MOC, pressure & battery limit coordinates for RWTP, DM&CPU, ETP, STP.

Type of fire protection system for cable cellar

Not in bidders scope.

A fire hydrant is not under scope of bidder.

Fire protection system for cable cellar is not under vendor scope.

33 SECTION – VI 5.2.3 (PART-A)

576 5.2.6.3 Firefighting system As per Referred clause, we presume that fire water pipes can be directly buried to soil with Wrapping & Coating.

Not in bidder scope

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34 - - - Firefighting system Kindly clarify whether Central Hose Station is also required or Hose Box dedicated for each Hydrant is sufficient.

Not in bidder scope

35 - - - Firefighting system Please confirm whether Single headed Hydrant can be considered for Fire Fighting or providing Double headed Hydrant is mandatory.

Not in bidder scope

36 - - - Firefighting system Kindly Clarify whether separate isolation valve is required for each Hydrant.

Not in bidder scope

37 - - - Firefighting system Kindly provide Fire Fighting Specification covering PMS/VMS for Fire Water, Hoses, Nozzle, Foam System, Spray System etc.

Not in bidder scope

38 - - - Transformer HVWS Protection

Kindly Clarify whether HVWS protection is required for Transformers. If required, please clarify above what Transformer capacity HVWS Protection of Transformer to be considered.

Not in bidder scope

39 - - - Clean agent System requirement for Control Room

Kindly clarify whether any Clean agent System is required for Control Room.

To be provide under bidder scope.

40 - - - HVAC

Kindly provide the HVAC Specification including the temperature to be maintained in Substation and Control Building premises, the type of AC to be selected based of Tonnage requirement etc. including Working and Standby requirement.

Bidder to refer Clause 3.5 at pg 561 Clause 6.21 at pg 732. Bidder to select suitable HVAC system based upon their previous similar executed system in compliance with ASHRAE/ISHRAE latest standards.

41 - - - Ventilation Please clarify how much air changes per hour to be considered for Ventilation fan selection.

Design & selection of complete Ventilation system is in the bidder scope. The ventilation system shall be decided by the bidder as per their offered system. Also, bidder to submit all calculations during detail engineering stage.

42 PC150/E/4004/SE

C – VI – 4.0A 8 of 31 3.1

Technical Specification - Raw water treatment plant

The chemical dosed water from flash mixer shall be directly routed to HRSCC where we are providing sufficient detention time. Hence there is no requirement of Flocculator in the scheme. Kindly confirm.

As per NIT

43 PC150/E/4004/SE

C – VI – 4.0A 8 of 31 2.1 / 3.1

Technical Specification – Process Scheme

There is a mismatch between the process description and technical specification for the requirement of sludge treatment in RWTP. Kindly confirm whether dedicated sludge treatment shall be provided for RWTP or sludge has to transfer to ETP for further treatment.

Dedicated sludge treatment shall be provided for RWTP as per NIT.

44 PC150/E/4004/SE

C – VI – 4.0A 8 of 31 3.1

Technical Specification - Raw water treatment plant

As per specification “Hydraulic Loading Margin in civil work – 20%”. We understand from referred clause that Hydraulic Loading of 20% to be considered for RCC structure of conduits & launders alone not for equipment. Kindly confirm.

Confirmed

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CLAUSE NO. Subject

45 PC150/E/4004/SE

C – VI – 2.0A 2 of 8 1.1 Raw Water Characteristics

There is no mention of faecal coliforms and total coliforms in the “Raw Water Quality”. The same is mentioned in the treated water and drinking water quality. Kindly provide the details.

As per NIT Bidder to satisfy himself regarding raw water quality before bidding to formulate the scheme and meeting the guaranteed parameters.

46 PC150/E/4004/SE

C – VI – 1.0A 5 of 7 3.1.5 Interconnecting piping

Kindly provide size, BOP, MOC & pressure details for all incoming line at battery limit.

As per NIT

47 PC150/E/4004/SE

C – VI – 1.0A 5 of 7 3.1.6 Tie – Up point

Please provide details of Tie-up points with co-ordinate for a) RWTP, DM plant & CPU system b) ETP & STP. c) Utilities (Nitrogen, Instrument air, LP steam, Cooling water,

Plant air)

All Effluents, condensates Utilities & Water will be terminated at Battery limit of bidder. However interconnecting piping within different units of WPT, DM CPU & ETP Plant will be under bidder scope. Battery limit Terminal points will be shown in plot plan.

48 PC150/E/4004/SE

C – VI – 1.0A 2 of 8 1.1

Design TSS – Raw water quality

Plant is designed for raw water TSS of 130 ppm. Kindly confirm. . As per NIT. Bidder to design Clarifier along with Flocculator considering at least 500 NTU.

49 Drg. No. PC009 –

0000-0001

Plot Plan of Proposed

Integrated Coal based Fertilizer

& Chemical Complex

Location of DM Water Plant (170 x 80 M)

Kindly confirm in the overall plot plan – Facilities / unit No. 9 –is the location for proposed DM Water Plant & CPU, since as per legend it‟s not under the proposed area.

Facilities / unit No. 9 is location for proposed DM Water & CPU plant.

50 Drg. No. PC009 –

0000-0001 Soft copy Kindly provide soft copy of plot plan drg. for our use. Shall be provided during detail engg.

51 General Contour drawing To assess existing ground level (EGL), kindly provide contour drawing for Integrated Coal based Fertilizer & Chemical Complex.

Ok shall be provided.

52 PC150/E/4004/SE

C – VI – 3.0A 3 of 10 1.0

DM Plant - Manual operation

Kindly clarify, if the plant is to have a provision for manual operation, the drives to be operated, annunciation etc., May please furnish the list of minimum hard wired back up items.

As per NIT

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53 PC150/E/4004/SE

C – VI – 4.0A 18 of 31 3.2

MOC of Degasser air blowers

MOC for Air blower is specified as CI for both Impeller and Casing. These Blowers are vertical centrifugal Fan type which are fabricated from CS sheet (Both Casing & Impeller).

As per NIT

54 PC150/E/4004/SE

C – VI – 4.0A 21 of 31 3.2

Acid/Alkali Measuring tank for regeneration

We understand that as per reference clause of storage tank specification, individual Acid/Alkali Measuring tank for DM & CPU Plant are not required and common Acid/Alkali Measuring tank for regeneration is accepted and capacity of tank should be addition of all the acid /alkali requirement for all units. Please confirm.

As per NIT

55 PC150/E/4004/SE

C – VI – 4.0A 21 of 31 3.2

Operating cycle time (hours) for resin exchangers (DM Plant & CPU)

OBR for MB - DM is 6 days once and 3 days once for MB – CPU which seems to be very high. Kindly reconfirm.

As per NIT

56 PC150/E/4004/SE

C – VI – 2.0A 3 of 8 1.0

CPU - Capacity

As per Turbine condensate and Process / steam condensate quantity received from coal gasification, Ammonia &Urea at battery limit is around 833 m3/hr. (569+45+135+84). Design capacity is 270 m3/hr. (1W+2S). Kindly clarify the train capacity of the CPU to be design.

CPU plant Design capacity is 270 m3/hr. (1W+2S) as per NIT.

57 PC150/E/4004/SE

C – VI – 4.0A 7 of 31 2.3 CPU – Cation Exchanger

Kindly let us know the purpose of cation exchanger in CPU & its design feed / product parameter.

As per NIT

58 PC150/E/4004/SE

C – VI – 8.0A 2 of 13 1.1.2

RWTP – Capacity - Cooling water pump

There is a mismatch between technical specification and performance guarantees parameter on cooling water pump capacity. Kindly confirm the capacity of cooling water pump 1950 m3/hr. or 925 m3/hr. (2W+1S).

Capacity of cooling water pumps (2W+1S) is 925

m3/hr each.

59 PC150/E/4004/SE

C – VI – 4.0A 18 of 31 3.2

Regeneration Level

Kindly confirm that the regeneration level for cation/Anion resin shall be decided by bidder on vendor recommendation.

Confirmed

60 PC150/E/4004/SE

C – VI – 3.0A 9 of 10 1

Operation period

We understand that there is a six-month period for only operation supervision for all plants. Kindly confirm.

Confirmed

61 PC150/E/4004/SE

C – VI – 3.0A 7 of 10 1.0 (xvi)

Supply of chemicals for 6 months operation after commissioning

We presume during the six-month operation supervision period supply of chemicals & consumables, etc., is not in bidder scope. Please confirm.

Consumables, lubricants and chemicals to besupplied in phased manner and shall be mutually agreed between OWNER andCONTRACTOR considering the consumption and storage capacity.

62 - - General Equipment Selection

We do not envisage any hazardous area within the battery limit of our scope for the proposed RWTP, DM Plant & CPU area and the equipment shall be selected for Non-Hazardous / Non-flameproof application. Please confirm.

Confirmed

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63 - - General Tender drawings Please provide P & I Diagram of Plant A, B &C of Talcher unit.

Please refer information provided in NIT.

64 - - General Bulk chemical storage sheds

We presume that there are no covered sheds required for Bulk chemical storage tanks and it' s ancillary requirements. Request your confirmation.

Confirmed

65 VI 2.0B 2 1.1 Inlet Effluent & outlet characteristics and other details

As per specification mentioned in the table only flow details are mentioned, request to provide the min/max/average flow, inlet pressure and temperature at the battery limit for all the effluent incoming lines. Please provide the effluent temperature to be considered for the design. Also kindly provide the location (incoming battery limit) in plot plan with elevation level (BOP), pipe diameter, and MOC.

As per NIT

Location will be marked in plot plan. Further details shall be provided during detail engg.

66 VI 2.0B 2 1.1 Contour plot plan (FGL and FFL requirement)

Kindly share the contour plot plan for our Hydraulics working, along with FGL and FFL for ETP plant.

Civil to reply

67 VI 2.0B 2 1.1 Effluent Characteristics for Steam Generation Plant (SGP)

Kindly share the complete effluent characteristics coming from Steam generation plant (SGP).

Boiler Blow Down (Boiler CBD): pH 9.0-11.0 Silica as SiO2, ppm < 0.5 Conductivity, S/cm < 50 Phosphate, ppm 2-5 Oily water from SGP: Oil & Grease 10 mg/l (Max.) pH 6-9 Cyanide as N Nil Suspended Solids Max. 100 mg/l Amendment will be issued.

68 VI 4.0B 6 4.1 Quantity of UF & RO System

As per the table for technical specification UF & RO system defined as 2 X 50 %, there is no standby requirement mentioned for both UF & RO, please confirm.

Confirmed

69 VI 4.0B 13 4.1, Sr. No. 25,

40 MWCO for UF System

MWCO mentioned in the table for technical specification, is 10,000 Dalton, the same shall be minimum less than 150K Dalton. Kindly confirm.

For RWTP, DM, CPU Plant, MWCO for UF System - 10KDalton For ETP & STP Plant, MWCO for UF System - 100KDalton Amendment will be issued.

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70 VI 4.0B 13 4.1, Sr. No. 25,

40 Flux for UF & RO system

Kindly allow bidder to design UF & RO system, including recovery, operating flux, backwash system (UF) as per Membrane manufacturer recommendation with respect to feed water qualities.

As per NIT.

71 Annexure II Sheet 1

of 3 PC150-7318-046-REV 0

Settling Tank requirement before DMF III

We suggest settling tank before DMF – III, because TSS load is 100 PPM in the feed which is high for removal by the DMF. Please Confirm.

As per NIT


of 3 PC150-7318-046-REV 0

UF Feed Tank instead of DMF Backwash Sump

We suggest UF feed tank after DMF- I & II with UF feed Pumps. Backwash water for DMF I, II, & III shall be taken from UF feed tank by dedicated pumps. Please Confirm.

As per NIT


of 3 PC150-7318-046-REV 0

Hypo for Cyanide Treatment

For Cyanide oxidation, kindly clarify whether hypo from CIO2 generator has to be considered.

As per NIT

74 VI 4.0B 8 4.1, Sr. No. 11 Chemical Storage requirement

As per the specification it is mentioned 60 days storage for chemical in chemical house, since the plot area available for ETP plant is less, Please confirm whether this can be reduced, if yes kindly indicate the new requirement.

As per NIT

75 VI 4.0B 10 4.1, Sr. No. 19 Quantities of DMF‟s Considering higher flow and predefined velocity in the specification, can bidder change the quantities of DMF‟s based on suitable diameter of DMF as per industrial practice.

As per NIT

76 VI 4.0B 5 3.2 Sludge Handling System

It is mentioned under the subjected clause that “Supernatant from Thickener and Centrifuge shall be recycled back to HRSCC”, but in PFD (PC150-7318-046-REV 0), it is shown as recycled to Equalization tank. Since there is a mismatch, kindly confirm the recycle point.

As per NIT

77 VI 1.0B 2034 3.1.1 Minimum Evaporator capacity

As per the respective clause, RO stages shall be finalized to achieve the minimum capacity of thermal evaporators. Kindly confirm the minimum capacity requirement for thermal evaporator?

As per NIT

78 VI 2.0B 3 Sr. No. 4,& 1.1a Effluent Characteristics for RO design

With reference to subjective clause for stringent water quality, we are assuming the wastewater characteristics from cooling tower blow down and SSF backwash mentioned in the table under clause number 1.1a, page no. 3 of 11 for RO design. Also please confirm the design temperature of effluent for RO design.

"Maxmium temperature - 50 degreeC Normal/min temperature - AMB."

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79 - - General Query Selection of RO membranes

There is no specification for RO membrane is mentioned, hence kindly confirm if low fouling membranes need to be considered for RO design.

Low Fouling RO membrane to be considered.

80 - - General Query MBR System requirement

Please confirm whether the MBR system mentioned in the PFD is “Membrane bio reactor”. Since there is no specification provided for membrane bio reactor system design, kindly provide the HRT needed for anoxic & aerobic reactors and flux details. Also please indicate the number of working & standby trains of MBR needed. Please confirm if bidder is allowed to propose alternative treatment process ASP / SBR for biological treatment.

Bidder to decide among MBR or SBR for biological treatment.

81 VI 1.0B 5 3.1.4 Location of Laboratory Location of common laboratory for RWTP, DM, CPU, ETP, STP and Steam Generation Plant is not mentioned in the specification hence the same shall be located in the WTP area. Kindly confirm.

Confirmed.

82 VI 3.0B 3 1.0, Sr. no. IX Scope of CRW pit and transfer pump

Kindly clarify the scope of pit for Contaminated rainwater collection in ETP plant area and transfer pump to ETP.

CRW pit and transfer pump has to be provided by the bidder

83 VI 4.0B 7 Sr. No. 5 HRSCC Feed Pump

Effluent transfer Pump (2W+1S) mentioned in the PFD (PC150-7318-046-REV 0) and HRSCC feed pump (1W+1S) mentioned in the specification of subjective clause are the same and shall be provided in equalization tank also the quantity shall be 1W + 1S. Kindly confirm.

Refer Effluent treatment plant, Sno. 5, SHEET 7 of 28, PC150/E/4004/ SEC-VI Part-4.0B

84 VI 1.0B 5 3.1.1 Sludge Storage & Disposal Kindly clarify and provide the detail for the scope of sludge storage and disposal centrifuge and ZLD along with the location.

Storage as per NIT. Disposal is under owner's scope as per NIT.

85 VI 1.0B 5 3.1.1 Salt Storage & Disposal There is no specification provided for transportation or storage of salt after crystallization. Kindly confirm the specification along with scope for the same.

Storage as per NIT. Disposal is under owner's scope as per NIT.

86 VI 3.7 Part B 8 4 O&M Period

We presume the O&M requirement mentioned in the subjective clause is applicable for the period of “startup, pre commissioning, commissioning, trial runs and performance guarantee test” of ETP & STP. Kindly Confirm.

Six months operation supervision after PGTR of all plants is in vendor‟s scope.

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87 VI 5.1 7 5 Flash Mixer We suggest distribution chamber with flash mixer instead of stilling chamber for chemical dosage & mixing before HRSCC. Please Confirm.

As per NIT

88 Plot Plan 1 PC009-0000-0001_Rev 6

Area for ETP Plant

We understood that plot plant layout given for ETP is less considering all the treatment units in it with approach, therefor we request to confirm if the area available as green field around can be utilized for ETP. Also, STP Plant is not located in the plant, request you to provide the location of STP plant.

STP Plant is located inside ETP Layout.

89 - - General Query Specification for Drain system safety equipment requirement

Kindly provide the specification for drain system for all the units and safety equipment to be considered within the plant.

As per detail Engineering by bidder depending on the service fluid of drain system within bidder‟s

package battery limits.

90 VI 3.0B 4 Sr. No. XXII Distribution Piping for treated sewage water

In subjective clause mentioned for distribution of treated sewage water in green belt area around the plant area in overall plot plan, kindly confirm the scope of distribution piping in overall plant.

Treated Sewage will be terminated at battery limit.

91 - - General Query P&ID for ETP, STP and ZLD

Kindly provide the tentative P&ID‟s for ETP, STP and ZLD. As per NIT

92 - - General Query ClO2 Generation system Please clarify and confirm whether ClO2 Generation system for ETP & RWTP will be dedicated or common.

Dedicated for ETP & RWTP. As per NIT

93 PC150/E/4004

/SEC-VI-3.0B 6 of 7 1 Operation Period

We understand that there is a six-month period for only operation supervision for ETP & STP Plants. Kindly Confirm.

Operation & Maintenance is not under vendor‟s scope however Six months operation supervision after PGTR of all plants is in vendor‟s scope.

94 PC150/E/4004

/SEC-VI-3.0B 4 of 7 1.0 (XVIII)

Supply of chemicals for 6 months operation after commissioning

We presume during the six-month operation supervision period, supply of chemicals & consumables, etc., along with unloading and storage is not in the contractor‟s scope. Please Confirm.

Consumables, lubricants and chemicals to besupplied in phased manner and shall be mutually agreed between OWNER andCONTRACTOR considering the consumption and storage capacity

95 VI 9.0B 22 General Query hazardous area classification drawing

We presume there is no hazardous area within the battery limit of our scope for the proposed ETP &STP, hence we do not envisage the selection of equipment for hazardous / flameproof application. Kindly confirm.

As per NIT

96 VI 1.0 (PART – B) 2034 of

3544 Cl.3.1 Plant Capacity

As per the clause 3.1, plant capacity is mentioned as 10 m3/hr. Bidder understood that mentioned capacity is final and includes only sanitary sewage and no industrial waste intrudes into STP. Please confirm

Confirmed As per NIT.

97 VI 1.0 (PART – B) 2034 of

3544 Cl.3.1.2 Treated effluent

As per the clause 3.1.2, “Treated effluent may be pumped to green belt area of the plant for horticulture purpose OR/AND to an equalization pond”. Please provide the location of equalization pond.

Equalization tank within ETP plant battery limit is equalization pond.

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98 VI 1.0 (PART – B) 2034 of

3544 Cl 3.1.2 Sludge Thickener

As per clause. 3.1.2,”Provision for STP sludge to ETP sludge thickening system shall also be kept”. Bidder understood that, sludge treatment system is common for both ETP and STP. Please confirm the bidder understanding.

Refer STP Package (tentative equipment List), SHEET 22 of 28, PC150/E/4004/ SEC-VI Part-

4.0B

99 Peak flow Please clarify whether peak flow to be considered for the design of STP units.

As per design philosophy, latest Code & Indian standards

100 VI 4.0 (PART – B) 2121 of

3544 Cl 4.0 STP Package units

As per the equipment list of STP package, total number of grit chambers mentioned as ONE. But one standby unit is required for uninterrupted operation and also during maintenance. Please let the bidder choose two units with one working and one standby.


4.0B.

101 FGL Please provide the FGL at STP site Land development drg showing FGL of various

units shall be provided to the bidders.

102 VI 4.0 (PART – B) 2039 of

3544 Annexure - II STP feed effluent

As per the schematic process flow diagram, sewage effluent is shown at the bar screen chamber. Please clarify the source and type of sewage effluent and whether this flow includes in the mentioned capacity (10 m3/hr) of STP.

STP Scheme is shown in PFD.

103 2038 of

3544 STP layout

As per plot plan, there is no separate area dedicated for STP. Bidder understood that STP would be within the area allocated for the ETP i.e, 110 m x 70 m. Please confirm.

Confirmed

104 VI 1.0 (PART – B) 2036 of

3544 Cl 3.1.2 STP Package

STP package includes pretreatment, biological treatment and disinfection. However, pretreatment required for SBR was done with screening and grit chamber, so additional pretreatment is not required in STP package. Please allow bidder to modify the treatment process as per the requirement.


4.0B.

105 Operating Hours Please provide the plant operating hours for design consideration. Continuous run. As per NIT

106 VI 2.0 (PART – B) 2051 of

3544 Cl. 3.0

Influent and effluent parameters

Please provide the phosphorous and nitrogen concentrations in influent and effluent of STP.

As per CPHEEO Manuals

107

PC150/E/4004/SEC VI-8.0B

4 of 11 6 Thermal evaporator Please do specify the required mositure content of salt produced after evaporator/crystallizer. as Evaporator sludge shall be further treated through Centrifuge. The moisture content at the outlet of ZLD Centrifuge shall be 20%. It shall be difucult to handle Salt having lower moisture content.

As per NIT. Salt from crystallizer shall be Free flowing

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108

PC150/E/4004/SEC-VI-1.0B

5 of 7 3.1.1 2x50%(1+1) Thermal Evaporator

Please confirm whether Thermal Evaporator is required 2 x50% capacity or 3 x100% as mentioned in the tender. Based on our operating experience of ZLD systems for more than 40 years, thermal evaporators, doesn't require standby, if it's designed well without compromising Material of construction and designs. Also the cost of evaporators are high. Considering standby evapotors will increase the project cost. Kindly confirm. Considering this is large capacity Evaporator/ crystallizer and the RO reject quality, it is recommended to have Mechanical Vapor Recompressor (power driven) systems, which will have less equipment to operate and maintain. Kindly confirm whether we can also consider power driven ZLD system (evaporator/crystallizer).

Refer Sno. 44, SHEET 18 of 28, PC150/E/4004/ SEC-VI Part-4.0B Thermal Evaporator: Number (Nos of Thermalevaporator to be decided bybidder with minimum 2 working of same capacities) Nos. N working (N) with 20 %overdesign on capacity. No standby envisaged for Thermal evaporator. Amendment will be issued.

109

PC150/E/4004/SEC

-VI/4.0B

18 of 28 45 Crystallizer NW+2S As per specs, we have to supply 3x100% capacity of Crystallizer units. Based on our experience of well designed crystallizers, standby crystallizers are not required if selection of material of constructions are not compromised. Also the cost of crystallizers are very high. We do not recommend standby. We recommend 1 x 100% or 2 x 50%, no standby is required. Kindly confirm. Crystallizer unit with 20% overdesign on capacity. Can Crystalliser be power driven

Crystallizer comprises of Settling tank, Pusher centrifuge, centrate tank and centrate pump. Concetrate from Thermal evaporator will be collected in settling tank (requirement to be decided by vendor), centrate from pusher centrifuge will be collected into centrate tank, which will sent back through centrate pump to Thermal evaporator. CRYSTALLIZER: Number Nos. (NW + 1S) with 20 % overdesign, (Nos of crystallizers to be decided by bidder with minimum 2 working) Settling tank (if required), One (1) No. MOC: SS-316, capacity: as per system requirement, MOC: FRP Pusher Centrifuge, capacity: as per system requirement with minimum 2 working, (NW + 1S), MOC: SDSS Mother Liquor tank/Centrate Tank, capacity: as per system requirement, MOC: FRP Mother Liquor tank/Centrate Pump capacity & head: as per system requirement, MOC: SDSS Crystallizer sludge storage shed sufficient for 1 Month storage shall be provided by bidder. Salt from cystallizer shall be Free flowing. Amendment in this regards will be issued.

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110

PC150/E/4004/SEC

-VI/4.0B

18 of 28 44 No of Thermal Evaporator/Crystallizer

Do we require to consider N Working + 20% overdesign on capacity.Please do confirm the number of Evaporator and Crystallizer streams to be considered.

Refer above

111

PLOT PLAN OF PROPOSED

INTEGRATED COAL BASED

FERTILIZER AND CHEMICAL COMPLEX

- PC009-0000-

0001, Rev.6_OP

Substation We presume that, block no. 33” substation” is not relevant to our package. Kindly Confirm.

Revised plot plan indicating tentative location of Offsite & Utilities Substation will be issued.

112

PLOT PLAN OF PROPOSED

INTEGRATED COAL BASED

FERTILIZER AND CHEMICAL COMPLEX

- PC009-0000-

0001, Rev.6_OP

Usage of Existing Cable Rack

From the plot plant layout, we understand that cable rack is considered from Electrical distribution system & EDG building to various packages of the plant. We presume that sufficient space in the cable trays shall be provided by customer for laying our incoming cables. Kindly Confirm.

Space shall be made available in Owner‟ Pipe rack. However, Cable trays shall be in Bidder‟s

scope.

Other than Owner‟ s pipe rack, if cable trays are required, then structural support for Cable Trays

and cable trays shall be in Bidder‟s scope.

113

SECTION – VI 5.3

DESIGN PHILOSOPHY –

ELECTRICAL

- - Incoming Power Supply We presume that, 2 Nos. of normal supply and 1 No of emergency supply of 11kV shall be provided for three substations individually at Offsite & Utilities substation. Kindly confirm.

2 Nos. of normal supply and 1 No of emergency supply of 11kV (for part A) and 2 Nos. of normal supply and 1 No of emergency supply of 11kV (for part B)shall be provided at Offsite & Utilities substation,

114

SECTION – VI 5.3 DESIGN

PHILOSOPHY – ELECTRICAL

Sheet 8 of 83

(Part-A) Sheet 8

of 83 (Part-B)

PC/150/E/4004/SEC-VI 5.3

(PART-A&B), 1.4

Battery limit for Owners load

From the Stated clause, we observed that "LSTK Contractor to provide required provision in their transformers, Switchboards and other associated equipment's for feeding owners loads". We presume that, only feeder provision shall be made available in the Switchgear panel to feed the power supply to owner‟s load. Further distribution from the switchgear panel to owner‟s loads shall be in customer scope. Kindly Confirm.



DESIGN PHILOSSOPHY

Sheet 9 of 83

(Part-A) Sheet 8

of 83 (Part-B)

PC/150/E/4004/SEC-VI 5.3

(PART-A&B), 1.6

Power Source Tapping point

Kindly note that, Power source is mentioned as Offsite & Utilities substation in the specification. However, we are unable to locate the same in the plot plan. We presume that block no.17 “Electrical distribution system & EDG” shall be read as Offsite & utilities substation. Kindly confirm.

Revised plot plant is attached indicating the tentative location of Offsite & Utilities Substation.

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Sheet 23 of

83(Part-A)

Sheet 22 of 83 (Part-B)

PC/150/E/4004/SEC-VI 5.3

(PART-A&B), 5.1.15

Feeder Pillar Box Quantity

From the stated clause we observed that "Location of Feeder pillar box shall be decided during detail engineering". We presume that one no. of feeder pillar box shall be considered inside each substation location in the proposed plant. Kindly Confirm.

Indoor type feeder pillar, which shall be located in a separate room other than substation Building. No of Feeder Pillars : RWTP: 1 No. DM & CPU: 1 No. ETP & STP: 1 No. Location of feeder pillar shall be decided during detailed engineering.

117



Sheet 23 of

83(Part-A)


PC/150/E/4004/SEC-VI 5.3

(PART-A&B), 5.1.12

HV Emergency power supply

From the stated clause we observed that "HV emergency board shall also have 1 Normal and 1 Normal / Emergency incomer". However, in the same specification, PC/150/E/4004/SEC-VI 5.3 (PART-A & B), Cl.no. 1.6, Sheet. 09 of 83(Part-A) Sheet. 08 of 83(Part-B), it is mentioned as " Normal power supply shall be tapped from 2 Nos. 11KV feeders and Emergency power supply shall be tapped from 1 Nos. 11KV feeders (Emergency Bus) at Owner‟s Offsite & Utilities Substation". We presume that 2 Nos. of normal supply and 1 No. of emergency supply shall be considered for the 11kV Switchgear panel. Further distribution of Emergency supply at 3.3kV & 415V Switchgear panels are not envisaged. Since the same system shall feed the emergency loads during failure of normal supply. Otherwise separate set of Emergency transformers will be applicable. Kindly clarify the requirement.

2 Nos. of normal supply and 1 No of emergency supply of 11kV (for part A) and 2 Nos. of normal supply and 1 No of emergency supply of 11kV (for part B)shall be provided at Offsite & Utilities substation. Further distribution of Normal and Emergency supply at 11kV, 3.3kV & 415V Switchgear panels in bidder‟s scope. Emergency Switch board shall be separate from Normal switchboard.

118



Sheet 23 of

83(Part-A)


PC/150/E/4004/SEC-VI 5.3

(PART-A&B), 5.2.4

Emergency AC lighting requirement

From the stated clause it is mentioned as "Separate 240VAC UPS System shall be provided to feed MCC control supply, Control Room (to meet 250 lux in case of UPS Supply only) ) & Substation lights (30% of total light) , LMS Equipment, Fire Detection & Alarm System etc". However, in the same specification PC/150/E/4004/SEC-VI 5.3 (PART-A&B), Cl.no. 5.3.1, Sheet. 24 of 83, it is mentioned as "33 % of total light of plant excluding Substation & Control Room shall be fed from Emergency Power (DG Power) & 10% of light or required Number of lights for safe evacuation at strategic locations, whichever is higher, shall be used as panic light (110V DC)".

While calculating the above, we understand that 30% of the lighting shall be fed from UPS, 33% of the lighting fed from emergency supply and 10% of the lighting fed from DC supply. Only 27% of the lighting is fed from normal supply. Kindly confirm the same.

Control Room & Substation 30% lights shall be UPS only. 33 % of total light of plant and 10% of light or required Number of lights for safe evacuation at strategic locations excluding Substation & Control Room shall be fed from Emergency Power (DG Power), in case of failure of Normal Power.

119 SECTION – VI 5.3 DESIGN

Sheet 23 of

PC/150/E/4004/SEC-VI 5.3

(PART-A&B),

Emergency lighting supply requirement

From the stated clause it is mentioned as "One third lighting load shall be connected to the emergency power (DG Source) to provide emergency light during failure of normal power". However, in the

DG is not in bidders scope. 1 No of emergency supply of 11kV (for part A)

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5.3.1 specification PC/150/E/4004/SEC-VI 5.3 (PART-A&B), Cl.no. 5.1.13, Sheet. 23 of 83, it is mentioned as "Auxiliary Services Power Board (ASPB) having essential bus (to be fed from Emergency Bus of EPMCC) and nonessential bus (to be fed from Normal Bus of EPMCC) shall be provided in the plant for supplying power to welding switch sockets, lighting load, EOT crane and other auxiliary loads". We presume that DG is not in the scope of supply and emergency power supply shall be fed from Auxiliary Services Power Board. Kindly Confirm.

and 1 No of emergency supply of 11kV (for part B) shall be provided at Offsite & Utilities substation. Further Distribution of Emergency power supply at 11kV, 3.3kV & 415V Switchgear panels shall be in bidder‟s scope.Bidder shall indicate the details of Normal Loads and Emergency Loads in the bid for Owner‟s DG sizing.

120



Sheet 26 of

83(Part-A)

Sheet

25 of 83 (Part-B)

PC/150/E/4004/SEC-VI 5.3

(PART-A&B), 6.20

Panel Clearances inside Electrical Building

Panel clearances seems to be higher side which may lead to increase in substation sizes. In case of acceptance of the following clearances, we may optimize the building sizes. Kindly confirm.

1. 11kV/3.3kV panels, front clearance shall be 2.5m and rear clearance shall be 1m.

2. 415V Panel front clearance shall be 1.5m and rear clearance shall be 1.5m for double front and 1m for single front.

3. Clear space of 2.5m for HT panel and 2m for LT panels between the two boards facing each other.

4. Clear space of 1.5m on either side at entrance / exit. 5. Clear space of 1m between two boards in same line after

future panel space of switchboard.

As per NIT.

121



Sheet 53 of

83(Part-A)


PC/150/E/4004/SEC-VI 5.3

(PART-A&B), 9.15.1

Space provision for the LMS System

From the stated clause we observed that, "Data concentrator Panel and other LMS System Equipment's including PC console, chairs, furniture etc. for Raw Water Treatment Plant - DM Water - Condensate Polishing Unit – ETP & STP - shall be in EDS LSTK Contractor„s scope. However, LSTK contractor has to consider space for same in separate room in Substations. Kindly provide us the room size requirement for our consideration.

Same shall be provided during detailed engineering based upon Load Details of Raw Water Treatment Plant - DM Water - Condensate Polishing Unit – ETP & STP

122



Sheet 59 of

83(Part-A)


PC/150/E/4004/SEC-VI 5.3

(PART-A&B), 11.0

Illumination system We presume that, Lighting shall be considered within the boundary of RWTP, DM, CPU, ETP and STP. Lighting outside the boundary of our scope of plant is not covered in LSTK scope. Kindly confirm.

Lighting shall be considered within the battery limit of RWTP, DM, CPU, ETP and STP

123 SECTION - VI 1.0

(PART-B) 2038 ANNEXURE-I

Plot plan of proposed Integrated Coal based Fertilizers & Chemical complex

Kindly indicate WTP Control Room (CR) and Central Control Room (CCR) location in the plot plan.

Bidder to propose suitable location and the same shall be finalized subject to TFL‟ s approval.

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SEC.NO.. Page No.

CLAUSE NO. Subject


(PART-B) 2038 ANNEXURE-I

Kindly indicate the distance between Control Room (CR) and Central Control Room (CCR) with tentative routing.

Refer Overall plot Plan Dwg NO- PC009-0000-0001-REV 6_ of Tender Document. Bidder to propose the routing and the same shall be finalized subject to TFL‟S approval.


(PART-B) 2039-2041

ANNEXURE-II Schematic flow diagram of ETP with ZLD & STP

Kindly provide P&ID‟s for RWTP, DM, CPU, ETP with ZLD, STP to quantify Field Instruments.

Same shall be in Bidders scope.


(PART-B) 2077 Nil

Contractor Scope of Work (Instrumentation)

Kindly provide DCS System Configuration diagram for each of the following systems

1. RWTP, DMW & CPU 2. ETP with ZLD & STP

System configuration to be proposed by Bidder. The same shall be finalized subject to TFL‟s approval.

127 SECTION – VI 3.4 (PART-A & PART-

B) 366 (S)

Plant Communication system

We presume that Plant communication system is same as Public address system envisaged for this package. Please confirm.

Confirmed.


B) 366 (U)

Public Address System for Plant

Kindly provide technical details & interface options of existing Owner‟s Public Address System.

Same shall be provided during detailed engineering.


B) 366 (V)

Fire Detection & Alarm System for Plant

Kindly provide technical details & interface options of existing Owner‟s Fire Detection & Alarm System.

Same shall be provided during detailed engineering.


(PART-B) 2077 Nil


Kindly provide integration philosophy of CCTV, EPBAX & LAN for CR with CCR.

The same shall be decided during detail engineering.


(PART-B) 2077 Nil


We propose to have a common DCS system for both RWTP, DM, CPU and ETP with ZLD, STP for single point control & monitoring. Kindly confirm.

Not acceptable. Kindly follow Tender requirement.


(PART-A) 380 3.24

Control Philosophy (General)

We propose Current indication for motors above 30kW in CR. Please confirm.

Kindly follow tender requirement. Current Indication (All motor > 5KW)


(PART-A) 380 3.25

Control Philosophy (General)

We presume “auto start” through 1oo2 philosophy is for critical pumps. Please confirm.

Bidder understanding is correct


(PART-A) 386 6.0 Electrical Supply

We request you to allow bidder to use single cable for DI/DO as the interrogation voltage is 24VDC. Please confirm.

Tender condition shall prevail.


(PART-A) 386 6.0 Electrical Supply

Please furnish feeder rating of redundant UPS to be provided by Client.

Feeder rating of redundant UPS shall be same as of main UPS. UPS to be supplied by bidder.

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CLAUSE NO. Subject


(PART-A) 422 8.2 PLC requirements

Digital output module channel density was mentioned as “16 channels”. Kindly permit us to consider 32 channels DO cards.

Kindly follow Tender requirement.


(PART-A) 422/124

4 1.0

Instruments and Control philosophy / Sequence of Events (SOE)

From both referred clauses in the specification, SOE system requirement is contradicting each other. Please confirm which clause to be confirmed.

Separate SOE work station is not required. ES cum SOE shall be required.

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REPLIES TO PRE BID QUERIES -LOT 3 Date 12.01.2021 NIT No. PNMM/PC-150/E/4004/NCB Dated 16.10.2020 RAW WATER TREATMENT PLANT, DM WATER, CONDENSATE POLISHING UNIT, EFFLUENT TREATMENT PLANT WITH ZLD & SEWAGE TREATMENT PLANT AT TALCHER, ODISHA (INDIA) FOR TALCHER FERTILIZERS LTD. (TFL) AT TALCHER, ODISHA

Sl. No.

REFERENCE OF TENDER DOCUMENT

BIDDERS QUERY OWNER’S

REPLY SEC. NO PAGE .NO

CLAUSE. NO SUBJECT

1. SECTION – VI 4.0 (Part A)

SHEET 26 of 31

3.5 Resins for Cation, Anion & Mixed Bed

Uniformity co-efficient of resins

Bidder proposes to have Uniformity Coefficient of resin <1.2. Kindly Confirm the same.

Confirmed as per NIT


SHEET 26 of 31


Self Neutralizing Effluent

As per tender. “Regeneration effluent generated from cation and anion exchangers and also acidic and alkaline effluents from mixed bed shall be self neutralizing.” Kindly confirm that the chemical consumption to be submitted accordingly.

Confirmed as per NIT


SHEET 26 of 31


Resin Type

Bidder understand that the offered resin for Cation, anion and Mixed bed exchanger can be either Microporous Polystyrene or gel type. Kindly confirm the bidder understanding is correct.

As per NIT


SHEET 18,19 of 31

3.1 Technical Specification RWTP Sr. No 21

Cycle time-DM Bidder understand that the cycle time mentioned for Cation, Anion and Mixed Bed exchanger for DM plant & CPU Plant is minimum and can be increased to suit the outlet quality.

As per NIT


SHEET 24, 25 of 31

3.1 Technical Specification RWTP Sr. No 21

Cycle Time-CPU

As per NIT

6. General To optimize the space availability, bidder can propose underground RCC tanks. Kindly confirm.

As per NIT

7.

SECTION VI – 5.3

DESIGN PHILOSOPHY- ELECTRICAL

749 / 3544

9.4.4.24 control supply from 240VAC, 50Hz UPS

Control supply for motor feeders (MCCB & contactor controlled) & power feeders (MCCB controlled) are to fed by 240V UPS. This is not a standard generally followed. We request you to change this as NON UPS power supply.

As per NIT.

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CLAUSE. NO SUBJECT

8.

SECTION VI – 5.3

DESIGN PHILOSOPHY- ELECTRICAL

715 / 3544

1.6

11 kv incoming cable (normal & emergency power supply)

Please confirm the location of utility substation in the plot plan provided in tender and clarify the below for the Main 11 kv incomer cable routing from utilities substation to DM plant & ETP.

Route length

Route methodology (confirm either buried or overhead pipe/cable rack)

Cable tray supports scope

Route clearance ( any hindrance to routing the incoming cable)

Revised plot plan indicating tentative location of Offsite &

Utilities Substation is attached.

Space shall be made available in Owner’ Pipe rack. However,

Cable trays shall be in Bidder’s scope.

Other than Owner’ s pipe rack, structural

support for Cable Trays and cable trays

shall be in Bidder’s scope.

Cables shall be laid in overhead cable trays

only.

9. SECTION I

ITB

32 /

3544 12.5

Price Adjustment

Request you to provide price adjustment clause due to escalation of prices

Not acceptable

10. SECTION I

GCC

188 / 3544

5.6 BOCWS

Request you to confirm the percentage BOCWS cess to be included in the Basic Price.

This being LSTK NIT, bidder has to quote

BOCW as applicable.

11. SECTION I

SCC

287/ 3544

14.2 Mobilization Advance

Under GST Law, advance received for execution of Works Contract is liable to pay GST (Goods and Service Tax) by the recipient.

Shall be as per NIT. Refer Clause 13.9 of

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CLAUSE. NO SUBJECT

In view of this, request the employer to ensure pay GST as applicable along with the payment of mobilization advance.

Instruction to bidder.

12. SECTION I

ITB

35 /

3544 16

Earnest Money Deposit

To support the Construction & Infrastructure sector, Our Finance Minister announced relaxation on Earnest Deposit Money on Government Tenders under AatmaNirbhar Bharat 3.0 (on 12th Nov 2020), hence EMD will not be required for tenders and will be replaced by Bid Security Declaration by bidder.

Kindly confirm

Under review

13. SECTION I

ITB

3 / 8

3544 38

Contract Performance Security

To support the Construction & Infrastructure sector, Our Finance Minister announced relaxation on Performance Security on contracts in the construction/infrastructure sector will be reduced to 3 per cent vs 5% -10% on all Government Tenders under AatmaNirbhar Bharat 3.0 (on 12th Nov 2020), hence request to consider performance security of 3%instead of 10%

Kindly confirm

Under review

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raw water treatment plant, dm water, …

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