summary presentation updaterev20

KINGDOM OF SAUDI ARABIAROYAL COMMISSION FOR JUBAIL & YANBU

ROYAL COMMISSION IN JUBAIL

CONTRACT NO : 641-C46REHABILITATION OF RC

HOSPITALSITE INFRASTRUCTURE

GMTA PRESENTATION

AUGUST 2014

AGENDA1. INTRODUCTION2. POTENTIAL REHABILITATION3. CONDITION SURVEY

1. MECHANICAL2. ELECTRICAL 3. STRUCTURAL

4. PIPING DISTRIBUTION OPTIONS1. OPTION 1 – TUNNEL OPTIMIZATION2. OPTION 2A – OVERHEAD BRIDGE3. OPTION 2B – TUNNEL & OVERHEAD4. OPTION 3 – COMBINE ESSENTIAL & NONESSENTIAL CHW

5. SUMMARY

2

3

PIPE RISER FROM TUNNE

L TO EQUIPMENT

ROOM-1

POWER

PLANT

AREA OXYGEN STORAGE TANKS

WATER

RESERVIO

R AND

PUMP ROO

M

FUEL TANKS

TRANSFOR

MER ARE

A

CHILLER COMPOUND

TRANSFORMER AREA

UNDERGROUND UTILITY TUNNEL

HIG

HW

AY 4

HIG

HW

AY 4

AL LULU ROAD

MAIN ENTRANCE

AL LULU ROAD

EMERGENCY ENTRANCE

INTRODUCTIONThe Scope of the project is to rehabilitate and update the existing RC Hospital site infrastructure to bring the existing facilities to current code requirements.

OVERALL SITE LAYOUT

PIPE RISER FROM TUNNE

L TO EQUIPMENT

ROOM-1

POWER

PLANT

AREA OXYGEN STORAGE TANKS

WATER

RESERVIO

R AND

PUMP ROO

M

FUEL TANKS

TRANSFOR

MER ARE

A

CHILLER COMPOUND

CHILLED WATER

PUMPS & SWITCH

GEAR

ROOM

UNDERGROUND

UTILITY

TUNNEL

HIG

HW

AY 4

HIG

HW

AY 4

AL LULU ROAD

MAIN ENTRANCE

AL LULU ROAD

EMERGENCY ENTRANCE

OVERALL SITE LAYOUTTHE SCOPE OF WORK INCLUDE:

STUDY AND INSPECTION OF EXISTING SITE UTILITIES

RENEWAL / REHABILITATION OF EXISTING UTILITY

SYSTEMS

BRING EXISTING FACILITIES TO CURRENT CODE

REQUIREMENTS

REPLACEMENT / REHABILITATION OF CONTROL

SYSTEMS ASSOCIATED WITH MECHANICAL SYSTEMS

CHANGING MEDIUM VOLTAGE TO LOW VOLTAGE FOR

THE CHILLERS

POTENTIAL REHABILITATION INCLUDES:

CHILLED WATER SYSTEM

STEAM SUPPLY SYSTEM

HOT AND COLD WATER SYSTEMS

DISTRIBUTION PIPING SYSTEMS

EMERGENCY POWER

MEDICAL GAS SYSTEMS

ELECTRICAL SUPPLY

TELECOMMUNICATION SYSTEM

FIRE HYDRANTS

ME- 4

5

POTENTIAL REHABILITATION


STEAM SUPPLY SYSTEM

HOT AND COLD WATER SYSTEMS

DISTRIBUTION PIPING SYSTEMS

EMERGENCY POWER

MEDICAL GAS SYSTEMS

ELECTRICAL SUPPLY

THE SCOPE OF REHABILITATION INCLUDES:

CONDITION SURVEY

CONDITION SURVEY-CHILLER COMPOUND

CHILLER COMPOUND LAYOUT

KEY PLAN

MAIN PIPES GOES THRU TUNNEL THEN UNDER RAMP

MAIN PIPE HEADER WITH SUPPORTS

NE.CH-7

PROPOSED REPLACE CHILLERS: OPTION 1 – 8 CHILLERS FOR N+2 VERSUS OPTION 2 – 11 CHILLERS FOR 100% REDUNDANCY

PIPING HEADERS REPLACED BACK TO PUMP HOUSE MOVE NEW CHILLERS TO MEET CHILLER MANUFACTURER CLEARANCE RECOMMENDATION

ADD SUPERVISORY CONTROLS AND METERING

OPTION-1

OPTI

ON-2

EXISTING CONDITION FOURTEEN (14) TRANE AIR-COOLED CHILLERS

ELEVEN (11) TRANE AIR-COOLED CHILLERS INSTALLED IN 1980s

286 TON CENTRIFUGAL CHILLERS (OBSOLETE)

4160V MACHINES

FIVE (5) ARE IN WORKING CONDITION, REMAINING CHILLERS ARE OUT OF

SERVICE

THREE (3) TRANE AIR-COOLED CHILLERS INSTALLED IN 2008

400 TON SCREW CHILLERS

480V MACHINES

THE CHILLED WATER PIPING FROM CHILLER COMPOUND TO CHILLED WATER PUMP ROOM DOES NOT

SHOW VISUAL SIGNS OF LEAKAGE EXCEPT AT SPECIFIC TIE IN POINTS TO THE CHILLERS. ME- 7

8



KEY PLAN


THREE SCREW TYPE CHILLERS-2010400 TON480V MACHINES

EXISTING CONDITION:ELEVEN CENTRIFUGAL CHILLERS(OBSELETE)-1986

300 TON4160V MACHINESFIVE (5) ARE IN WORKING CONDITION, REMAINING

CHILLERS ARE OUT OF SERVICE


NE.CH-7

9



KEY PLAN



NE.CH-7

RECOMMENDATIONS:

REPLACE CHILLERS:OPTION 1 – 8 CHILLERS FOR N+2 VERSUSOPTION 2 – 11 CHILLERS FOR 100% REDUNDANCY

PIPING HEADERS REPLACED BACK TO PUMP HOUSE


OPTION-1

OPTION-2

CONDITION SURVEY-CHILLED WATER PUMP ROOM

CHILLED WATER PUMP ROOM LAYOUT

KEY PLAN

NE.CHWP-1&2

UTILITY TUNNEL ACCESS

PROPOSED REPLACE 3 CHILLED WATER PUMPS

REPLACE PIPING WHEN PUMPS ARE REPLACED

EXPAND OPD PUMP ROOM TO PROVIDE ACCESS TO PUMPS


NEW OPD PUMP ROOM WITH 2 NE.CHW.PUMPS

EXISTING CONDITION SIX (6) CHILLED WATER PUMPS SERVING ESSENTIAL AND NON-ESSENTIAL

TWO (2) HORIZONTAL SPLIT CASE PUMPS

SERVING OPD CHILLED WATER CIRCUIT


SERVING NON-ESSENTIAL CHILLED WATER CIRCUIT

ONE PUMP IS NOT IN SERVICE


SERVING ESSENTIAL CHILLED WATER CIRCUIT

THE CHILLED WATER PIPING HEADERS SHOW MINOR SIGNS OF LEAKAGE

ME- 10

EXPANSION

OF OPD PUMP ROOM

11



KEY PLAN

NE.CHWP-1&2

UTILITY TUNNEL ACCESS

NEW OPD PUMP ROOM WITH 2 NE.CHW.PUMPS

EXISTING CONDITION:


SERVING OPD CHILLED WATER CIRCUIT


SERVING NON-ESSENTIAL CHILLED WATER CIRCUIT

ONE PUMP IS NOT IN SERVICE


SERVING ESSENTIAL CHILLED WATER CIRCUIT

12



KEY PLAN

NE.CHWP-1&2

UTILITY TUNNEL ACCESSRECOMMENDATIONS:REPLACE 3 CHILLED WATER PUMPS

REPLACE PIPING WHEN PUMPS ARE REPLACED

EXPAND OPD PUMP ROOM TO PROVIDE ACCESS TO PUMPS

ADD SUPERVISORY CONTROLS AND METERINGNEW OPD PUMP ROOM WITH 2 NE.CHW.PUMPS

13

S.NO. ROOM NAME CODE REQUIREMENTCOMPLIANCE WITH

CODERECOMMENDATION

1 Chiller Compound

Mechanical utilities shall have proper access, clearance and

location and must be as per RC engineering requirements. Refer to RC Engineering

Manual, Chapter 6 section 6.16(C, D, E).

YesInstall new chillers per manufacturer required

clearance

2Chilled Water Pump

Room (Old)Yes

Piping replacement and relocation will improve tunnel

access.

3Chilled Water Pump

Room (New)No

The new chilled water pump room is recommended for

expansion so as to gain space for both the existing pumps.

CODE COMPLIANCE SUMMARY

CONDITION SURVEY-POWER PLANT

KEY PLAN

POWER PLANT LAYOUT

CALORIFIERS

STEAM HEADER

BOILER PIPES AND FLUE STACK

PROPOSED REPLACE BOILER 1, BLOW DOWN TANK , 2 CALORIFIERS

RENOVATE ONE BOILER

REPLACE PIPING IN PLANT


EXISTING CONDITIONSTEAM PRODUCED WITH 2 FIRE-TUBE BOILERS

COCHRAN 1254 kW FIRE-TUBE BOILERS INSTALLED IN 2001 AND 2010 REPORTED TUBE LEAKS, ISSUES WITH CHEMICAL TREATMENT MANUAL BLOWDOWN VALVE

CONDENSATE RETURN TANK AND DEAREATOR REPLACED IN 2010 BLOW DOWN TANK INSTALLED IN 1980s FOUR (4) FUEL OIL PUMPS INSTALLED IN 1980s WATER TREATMENT REPLACED IN 2010

HOT WATER PRODUCED WITH 6 CALORIFIERS

FOUR (4) SERVE DOMESTIC HW (N+2) TWO (2) INSTALLED IN 2010 TWO CURRENTLY NOT IN SERVICE

TWO (2) SERVE LAUNDRY, INSTALLED IN 2010

STEAM PIPES AND VALVES SHOW VISIBLE SIGNS OF LEAKAGE AND TEMPORARY REPAIRS ME- 14

15


KEY PLAN

POWER PLANT LAYOUT

2.CALORIFIERS

1.STEAM HEADER


TWO FIRE TUBE STEAM BOILERS BOILER-1 INSTALLED IN 2012 BOILER-2 INSTALLED IN 2001 REPORTED TUBE LEAKS, ISSUES WITH CHEMICAL TREATMENT SYSTEMSIX CALORIFIERS, FOUR NEW AND TWO OLD(NOT IN SERVICE)

NEW CONDENSATE RECEIVER TANK AND DEAREATORSTEAM PIPING AND VALVES SHOW VISIBLE SIGNS OF LEAKAGE

16


KEY PLAN

POWER PLANT LAYOUT

2.CALORIFIERS

1.STEAM HEADER


RECOMMENDATIONS:

REPLACE BOILER-2, BLOW DOWN TANK, 2 CALORIFIERS

RENOVATE BOILER-1

REPLACE PIPING IN PLANT


17

S.NO. ROOM NAME CODE REQUIREMENTCOMPLIANCE WITH

CODE RECOMMENDATION

4 Power Plant

Mechanical utilities shall have proper access, clearance and

location and must be as per RC engineering requirements. Refer to RC Engineering

Manual, Chapter 6 section 6.16(C, D, E).

Yes Piping replacements will result in improved tunnel access.

5 Utility Tunnel NoThe work inside the tunnel must be as per approved mechanical

option.

6Water Reservoir and

Pump roomYes

Water reservoir and pump room are currently being upgraded.

Proper ventilation must be provided as per code

requirements.

CODE COMPLAINCE SUMMARY

18

CONDITION SURVEY-FUEL STORAGE TANKS

REPLACE FILL STATION

PROVIDE CONTAINMENT PAD AT FILL STATION


FUEL STORAGE TANK LAYOUT

2 FUEL TANKS

FILL STATION

FUEL PIPING IN TRENCH

19

CONDITION SURVEY-MEDICAL GAS SYSTEM

OXYGEN STORAGE TANK LAYOUT

REPLACE 1 COMPLETE TANK ASSEMBLY

REPLACE PIPING TO MANIFOLD ROOM


ADD BOLLARDS AROUND OXYGEN STORAGE TANK AREA

2 OXYGEN TANKS

OLD OXYGEN TANK

20

CONDITION SURVEY-UTILITY TUNNEL

HOSPITALSHAFT

POWERPLANT

MECHANICALROOM

MANY PIPE LEAKS AND PATCHES

PIPING EXPANSION PROBLEMS LEAD TO STEAM LEAK

LIMITED MEANS OF EGRESS AND LIMITED SPACE FOR REMOVAL, REPLACEMENT, MAINTENANCE

PUMPHOUSE

21

LIFE SAFETY REQUIREMENTS

UTILITY TUNNEL SATISFIES SAFETY RECOMMENDATIONS

NFPA 101 40.2.1.2 – NORMALLY UNOCCUPIED UTILITY CHASES THAT ARE SECURED FROM UNAUTHORIZED ACCESS AND ARE USED EXCLUSIVELY FOR ROUTING OF ELECTRICAL, MECHANICAL, OR PLUMBING EQUIPMENT SHALL NOT BE REQUIRED TO COMPLY WITH THE PROVISIONS OF CHAPTER 7 (MEANS OF EGRESS)

STANDARD INDUSTRY PRACTICE RECOMMENDS MEANS OF EGRESS EVERY 100 METERS (TUNNEL MAXIMUM 80 M)

OSHA 1926.1023 LADDERS (TUNNEL OK)

ACCESS TO

TUNNEL FRO

M POWER

PLANT

ROOM

ACCESS TO

TUNNEL FRO

M CHILLE

D WATER

PUMP

ROOM PO

WER

PLANT

CHILLED WATER PUMP

ROOM

UTILITY TUNNEL

PIPES RISING IN MECHANICAL ROOM FROM

TUNNEL

22

Switchgear & chilled water pump house building

Current MV Normal Switchgear

Proposed location for LV Switchgear

KEY PLAN

EXISTING CONDITION:

THE MV-SWITCHGEAR AND CHILLER CONTROL PANELS ARE OLD AND OBSOLETE.

Existing MV Switchgear Room

Current MV Essential Switchgear

CONDITION SURVEY-ELECTRICAL SYSTEM

23

Switchgear & chilled water pump house building

Existing MV Switchgear Room

KEY PLAN

Current MV Normal Switchgear

Proposed location for LV Switchgear

Current MV Essential Switchgear

RECOMMENDATION:

THE MEDIUM VOLTAGE SWITCHGEAR PANEL, CHILLER CONTROL PANELS, POWER AND LIGHTING PANELS, SHALL BE REPLACED DUE TO THE CHANGE IN THE NOMINAL VOLTAGE.

SWITCHING FROM MEDIUM VOLTAGE TO LOW VOLTAGE REQUIRES ADDITIONAL CHANGES IN POWER.

ADD NEW GENERATOR TO FULFILL THE INCREASED LOAD REQUIREMENTS AND SEPARATING CHILLER BACKUP POWER.

CONDITION SURVEY-ELECTRICAL SYSTEM

Structural Constraintsfor

Widening of the Existing Tunnel

24

Existing service Tunnel (yellow) shown on Pile layout plan

Tunnel Section InsideBuilding Edge

Tunnel Section OutsideBuilding Edge

A A

Section A-A

B B

Section B-B

Existing Tunnel

Outside Building Edge

Outside Building Edge

Concrete Piles

PIPING DISTRIBUTION OPTIONS

27

EXISTING PIPING NETWORK

NE CHWE CHWSTM & COND

NE

CH

WE

CH

WS

TM &

CO

ND

PUMPHOUSE

NE CHWSE CHWS

NE CHWRE CHWR

POWERPLANT

HOSPITALSHAFT

MECHANICALROOM

CWHW

CWHW

CW

HW

A

C

B

D

HOSPITALSHAFT

POWERPLANT

MECHANICALROOM

PUMPHOUSE

CHILLERYARD

CHILLERYARD

MUE CHW

E CHWRNE CHWR

STM & COND

28

APPROACH: CREATE ROOM IN TUNNEL BY RELOCATING COLD WATER, HOT WATER AND NON-ESSENTIAL CHILLED WATER PIPING

REPLACE REMAINING PIPING IN PHASES, CREATING DUPLICATE PATHWAYS, THEN DEMOLISH EXISTING PIPE

MAINTENANCE SPACE CREATED FOR STEAM PIPING

OPTION 1 – TUNNEL OPTIMIZATION

Option 1

EXISTING TUNNEL

29

OPTION 1 – Phasing

A

C

B

D

HOSPITALSHAFT

POWERPLANT

MECHANICALROOM

PUMPHOUSE

CHILLERYARD

NEW BOX TRENCH:6 COLD AND HOT WATER PIPES

NEW BOX TRENCH:2 CHILLED WATER PIPES

EXISTING TUNNEL:4 TO 6 CHILLED WATER AND STEAM PIPES

Step 1 – create dual path for cold and hot water(Box trench)

Step 2 – connect new piping and demo old

Step 3 – create dual path for chilled water(Box trench)


Step 5 – create dual path for STEAM(Tunnel A,B,C&D)


Step 7 – create dual path for E CHW (Tunnel A)


Step 9 – create dual path for NE CHW (Tunnels D&C). Steps 9 & 10 must be completed one pipe at a time (supply, then return)


Step 11 – create dual path for E CHW (Tunnels B, C, D). Steps 11 & 12 must be completed one pipe at a time (supply, then return)


30

OPTION 1 – STEP 12 Connect new pipe & demo

A

C

B

D

HOSPITALSHAFT

POWERPLANT

MECHANICALROOM

PUMPHOUSE

CHILLERYARD

E CHW

E C

HW

PUMPHOUSE

POWERPLANT

HOSPITALSHAFT

MECHANICALROOM

CHILLERYARD

CW

HW

NE

CH

W STM & COND

STM

& C

ON

D

MU

STM & CONDE CHWE CHWR

E CHWSE CHWR

NE CHW

NE CHWR

NE CHWS

NEW BOX TRENCH:6 COLD AND HOT WATER PIPES

NEW BOX TRENCH:2 CHILLED WATER PIPES

EXISTING TUNNEL:4 TO 6 CHILLED WATER AND STEAM PIPES

31

ADVANTAGES:

Results in adequate maintenance space for steam and condensate piping

DISADVANTAGES:

Multiple times when contractor will be coordinating temporary interruptions for switching utilities with phased approach

Difficult working conditions will increase time for demolition and replacement

Additional piping routed through mechanical room

Contractor will be working in tunnel with live steam leak

OPTION 1 – TUNNEL OPTIMIZATION SUMMARY

32

OPTION 2A – OVERHEAD BRIDGE

CREATE DUAL PATHWAY FROM PUMP HOUSE AND POWER PLANT TO MECHANICAL ROOM AND HOSPITAL SHAFT

REMOVE EXISTING PIPING IN TUNNEL LEAVING ELECTRICAL TRAY OR ABANDON COMPLETELY EXISTING TUNNEL MOVING ELECTRICAL TRAY TO NEW BRIDGE.

PROPOSED WALK OVER UTILITY BRIDGE

POWER PLANT

CHILLER COMPOUND

RC HOSPITAL LEVEL-2 ROOF


CHILLED WATER PUMP ROOM & SWITCH GEAR ROOM

POWER PLANT

PROPOSED HOSPITAL SHAFT

33

OPTION 2A – OVERHEAD BRIDGE

SECTION A SHOWING PIPE ARRANGEMENT ON THE BRIDGE

1500 mm

A

34

OPTION 2A – OVERHEAD BRIDGE SUMMARYADVANTAGES:

Overhead bridge will be constructed before demolishing any of the existing pipes

Mechanical system will remain in service until new utilities are replaced

Results in adequate space for ease of maintenance

DISADVANTAGES:

Some architectural modifications are required within hospital building to accommodate new mechanical shafts

35

OPTION 2B – TUNNEL & OVERHEAD BRIDGE

CREATE DUAL PATHWAY FROM PUMP HOUSE AND POWER PLANT TO MECHANICAL ROOM AND HOSPITAL SHAFT

REMOVE EXISTING PIPING IN TUNNEL LEAVING ELECTRICAL TRAY OR ABANDON THE EXISTING TUNNEL COMPLETELY MOVING ELECTRICAL TRAY TO NEW TUNNEL.

PROPOSED TUNNEL-2PROPOSED

TUNNEL-1


RC HOSPITAL LEVEL-5

ROOF

PROPOSED SHAFT IN MECHANICAL ROOM

PROPOSED HOSPITAL SHAFT

POWER PLANT

CHILLED WATER PUMP ROOM & SWITCH GEAR ROOM

CHILLER COMPOUND

36

OPTION 2B – TUNNEL AND OVERHEAD BRIDGE

SECTION A SHOWING PIPE ARRANGEMENT IN THE NEW TUNNEL

1500 mm

A

37

ADVANTAGES:

Tunnel and overhead bridge will be constructed before demolishing anyof the existing pipes

Mechanical system will remain in service until new utilities are replaced

Results in adequate space for ease of maintenance

DISADVANTAGES:

Higher initial cost

Some architectural modifications are required within hospital building to accommodate new mechanical shaft

Requires construction above hospital ceiling space for cold and hot water piping

OPTION 2B – TUNNEL AND OVERHEAD BRIDGE

38

CREATE ROOM IN TUNNEL BY RELOCATING COLD WATER, HOT WATER AND NON-ESSENTIAL CHILLED WATER PIPING

REPLACE REMAINING PIPING IN PHASES, COMBINING NON-ESSENTIAL AND ESSENTIAL PIPING TO CREATE MORE AVAILABLE SPACE

ADD NECESSARY VALVING AND CONTROLS TO ISOLATE ESSENTIAL PIPING

OPTION 3 – COMBINE NE & E CHW PIPING

EXISTING TUNNEL

39

ADVANTAGES:

Results in fewer pipes to maintain/creates additional space

DISADVANTAGES:

Multiple switch over required with phased approach

Temporary piping will run through hallway during (Section D) demolition and replacement

Difficult working conditions will increase time for demolition and replacement

Requires use of ceiling space for cold and hot water piping

Contractor working in tunnel with live steam

Requires window welds to install pipe

Due to risk associated with constructability of Option 3, we do not recommend moving forward with Option 3

OPTION 3 – COMBINE NE & E CHW PIPING SUMMARY

40

EQUIPMENT

NO INTERRUPTIONS OF SERVICE TO HOSPITAL(ALL EQUIPMENTS WITH REDUNDANCY)

SEQUENCING AND SERVICE INTERRUPTIONS

41

THE EXISTING REDUNDANCY OF THE SYSTEMS WILL ALLOW A PHASED REPLACEMENT OF EQUIPMENT WITHOUT INTERUPTION TO THE HOSPITAL OPERATIONS

CHILLERSCHILLED WATER PUMPSBOILERSCALORIFIERSOXYGEN TANK SYSTEM

OPTIONS 1 OR 2 WILL ALLOW A REDUNDANT STEAM, CONDENSATE, CHILLED WATER, AND HOT & COLD WATER PATHWAY TO BE CREATED BEFORE THE EXISTING PIPING SYSTEMS ARE REMOVED

PROVIDE NEW GENERATOR BEFORE DISCONNECTING POWER TO CHILLERS

SEQUENCING AND SERVICE INTERRUPTIONS

42

GIVEN THE RISKS ASSOCIATED WITH THE CONSTRUCTABILITY OF OPTIONS 1 & 3, THE RISKS OF HAVING CONTRACTORS WORKING NEAR LIVE STEAM LEAKS, AND THE RISKS TO HOSPITAL OPERATIONS BY CONDUCTING MULTIPLE SWITCH OVERS (FROM OLD TO NEW PIPING), WE RECOMMEND MOVING FORWARD WITH OPTION 2.

THE DIFFERENCE IN COST BETWEEN 2A AND 2B IS WITHIN THE UNCERTAINTY OF THE COST ESTIMATES.

OPTION 2A IS EASIER TO ROUTE PIPE TO THE EXISTING CONNECTION LOCATIONS AND WILL BE MORE MAINTAINABLE DUE TO BETTER ACCESS TO PIPES.

THE THREE OPTIONS HAVE BEEN PRESENTED TO END USER DURING WORKSHOPS, AND THEY FAVORED OPTION 2A – OVERHEAD DISTRIBUTION.

PIPING DISTRIBUTION RECOMMENDATION

43

RECOMMEND MOVING FORWARD WITH:


REPLACING 11 CHILLERS

REPLACING 3 CHILLED WATER PUMPS

REPLACING ALL CHILLED WATER PIPING

HOT WATER SYSTEM

REPLACING BOILER 1, RENOVATING BOILER 2

REPLACING IDENTIFIED ANCILLARY EQUIPMENT

REPLACING TWO CALORIFIERS

FUEL OIL SYSTEM

REPLACE FILL STATION

ADD CONTAINMENT PAD

RECOMMENDATION

44

RECOMMEND MOVING FORWARD WITH (CONTINUED):

MEDICAL GAS SYSTEM

REPLACE ONE OXYGEN TANK SYSTEM

REPLACE PIPING FROM TANKS TO MANIFOLD

ADD ISOLATION BOLLARDS

DISTRIBUTION PIPING

REPLACE ALL PIPING AND FITTINGS

ROUTE PIPE IN NEW OVERHEAD BRIDGE (OPTION 2A)

RECOMMENDATION

45

RECOMMEND MOVING FORWARD WITH (CONTINUED):

ELECTRICAL SYSTEM

CONSTRUCT NEW LV - SWITCHGEAR ROOM

REPLACE SWITCHGEAR PANEL, CHILLER CONTROL PANELS CWSA, CWSG AND CWH1, POWER AND LIGHTING PANELS CWA, CWB AND CWB

REPLACE MOTOR CONTROL CENTRES

INSTALL NEW GENERATOR 1750 KVA

UPGRADE FIRE ALARM SYSTEM FOR SWITCHGEAR AND CHILLED WATER PUMP HOUSE.

RECOMMENDATION

46

SUMMARY

OPTION 1 OPTION 2A OPTION 2B OPTION 3

TUNNEL OPTIMIZATION

OVERHEAD BRIDGE TUNNEL AND OVERHEAD

COMBINE NE & E CHW

COST 59,111,000 55,658,000 57,640,000

NOTRECOMMENDED

PHASING Complex phasing Simple phasing Simple phasing

COMPLEXITYDifficult working conditions andlimited access

Not complex and easy installation

Not complex and easy installation

summary presentation updaterev20

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