I1JilIIORONIO 1 REVISIONS

I1JilIIORONIOMichael PacholokDirector

Purchasing and Materials Management DivisionCity Hall, 18th Floor, West Tower100 Queen Street WestToronto, Ontario M5H 2N2

Joanne KehoeManagerProfessional Services

November 29, 2017

Posted via PDF (39 pages + Attachments)

ADDENDUM NO.9REQUEST TO TENIER (RET) NO. 235-2017

CONTRACT NO. 17ECS-MI-O3ABFOR: EFFLUENT DISINFECTION SYSTEM ASHERIDGES BAY TREATMENT PLANT

CLOSING DATE: DECEMBER 07, 2017, 12:00 NOON (LOCAL TIME)

Please refer to the above Tender Call document in your possession and be advised of the following:

1 REVISIONS

1.1 No revisions.

2 REVISIONS TO SPECIFICATIONS

2.1 Section 01040— Suggested Sequence of Construction

DELETE Item 1 .8.A. in its entirety and REPLACE WITH

A. No stockpiLing of excavated materials is permitted. Temporary stockpiling is allowed fortesting purposes only and must be in accordance with the approved Materials HandlingPlan. Temporary stockpiling area must be within the contractor’s work area, subject toCity review and acceptance. Maximum permitted duration of the temporary stockpilingshall be 2 weeks (10 working days).

2.2 Section 01050 — Suggested Sequence of Construction

DELETE Item 1.5.C. in its entirety and REPLACE WITH

C. Contractor shall coordinate with other contracts concurrently taking place on site and allother contracts that might impose restrictions on this contract. These contracts are listed asfollows, but not limited to:

Contract Estimated Timeframe*TWAS Contract Tentative Construction Start: QI 2019

Tentative Completion: Q4 2022Outfall Contract Tentative Constrtiction Stan: Q3 201$

Tentative Completion: 2023Phosphorus Removal Contract Ongoing

Tentative Completion: Q3 2019The approximate extent of these contract limits are identified on sheet no. 1G1O1 for reference.

*The dates identified are estimated on current construction projections and given for informationpurposes only.

DELETE Item 3.1.B.8 (D) in its entirety and REPLACE WITH

(D) All weather dependent shutdowns shall be addressed, provide clearly defined proceduresfor back out at any stage in case of weather. If the plant service shutdown depends on weatherconditions, based on weather forecast, the Contractor Administrator shall provide the Contractorwith a written confirmation one (1) day prior to commencing work on or related to the isolatedstructure. Notification and review period requirements for weather dependent shutdowns shallmeet the requirements of Section 01040.

DELETE Item 3.1 .D in its entirety and REPLACE WITH

D. Schedule tie-ins to other existing structures, pipelines and services based upon thefollowing limitations for service interruptions at the ABTP (Note: wherever listed notificationperiods differ from those stated in Section 01040, the more stringent provisions shall apply):

Plant Services Interruption Maximum Allowable Shutdown for Major Tie-ins

Total shutdown of plant 0 hours (no interruption to service)

Total shutdown of Plant Water Pumping 0 hours (no interruption to service) One inlet channel train must beStation operational at all times.

Seawall Substation 0 hours (no interruption to service) One service feeder to be active atall times. Primary dual feeders shall not be inactive for more than 8hours on dry days. Wet weather days (>1 mm precipitation) shall notallow deactivation of dual feeders. Contractor must fully plan and

coordinate scheduLe with plant operations 30 days prior to anyinterruption or reduction of feeds.

South Substation 0 hours (no interruption to service) One service feeder to be active atall times. Primary dual feeders shall not be inactive for more than 8hours on dry days. Wet weather days (>1 mm precipitation) shall notallow deactivation of duaL feeders. Contractor must fully plan andcoordinate schedule with plant operations 30 days prior to anyinterruption or reduction of feeds.

Fire Hydrant and Fire Protection System 4 hours. Contractor shall notify plant operations 1 day prior to shutdown.

Existing SCADA system 2 hours. Connect the cables where termination is close to other live

parts.

South Service Road 0 hours prior to implementation of the South Service Road detour(i.e. completion of temporary road).

7 months after the implementation of the detour. Contractor mustnotify plant operations 14 days prior to shut down.

2


Plant Potable (City) water 0 hours. (No shutdown)

distribution system

Entire Plant Water System 0 hours for shutdown of the entire system. If West Plant WaterHeader is shut down and isolated, East Plant Water Header mustremain operational and vice versa.

0 hours for all other plant water branches tie-ins.

Contractor must notify plant operations 7 days prior to any shutdown.

Plant Water Discharge Header in “M” 4 hours for the 1000 mm plant water discharge header isolation,Tunnel cleanout and tapping sleeve installation.


400mm Plant Water Header to the 0 hour. Accessed via the East Upper Tunnel.Disinfection Building


450mm Plant Water Header along First 2 hours. One time shut down for the final connection to the new 450Avenue (to Pelletizers) mm header in the Seawall Tunnel. Must occur within a planned

pelletizer maintenance window. Contractor must notify plantoperations 14 days prior to shut down.

Plant Water Branches to Critical Users 0 hours. (No shutdown)

Primary Plant Hot Water Heating System 0 hours (no interruption to service). System shall remain incontinuous operation. The New Connection to the Primary Plant HotWater Heating loop shall be done by hot (live) tapping as prescribedin Section 15050 — Basic Mechanical Materials, Methods AndRequirements.

Sanitary Drain Discharge Header in the 2 hours. Contractor must notify plant operations 7 days prior to anySeawall Tunnel shut down.

Instrument Air Suppiy Header in the 0 hours. (No shutdown)Seawall TunneL

Telephone or paging systems 2 hours. Contractor shall coordinate this task in a way that these twosystems are not shutdown at the same time. Contractor must notifyplant operations 7 days prior to shut down. (no interruption to

3


service between 5:00 a.m.- 10:00 p.m. Monday to Friday)

Coordination with Bell for relocation of main line is required.(Contact Person — Jason Daniel, Tel: (416) 296-6706)

Plant Fire Alarm System 1 hour (no interruption to service between 4:00 p.m.- 8:00 a.m.Monday to Friday; weekends and long weekends). Fire watch to beimplemented during this time.

Hazardous Gas Alarms 0 hours (No shutdown)

Emergency Lighting Systems 0 hours (No shutdown)

Existing Plant Heating and Ventilation 4 hours. Contractor shall notify plant operations 7 days prior to shutSystems down. No winter shutdown.

Flow or Water Level Measurement 0 hours. Contractor must plan for construction such that all effluentflow and levels in the existing bypass and effluent conduitsconnecting to the plant outfall can be measured by existing andlornew flow meters at any given time during construction.

Staging work for Demolition of existing Maximum 2 hours for shutdown of any PCS eqLtipment or anyPCS network equipment controlled from the new PCS network; Demolish

indicated existing RPUs, SCADA Workstations, Access Closets,Termination Panels and other PCS hardware and softwarecomponents.

Seawall Gates 12-24 hours per gate per shutdown. Refurbishment to be performedin sequential manner (1 gate at a time). Work must be performedduring dry weather conditions where no precipitation or snow melt isin the immediate forecast. Contractor must notify plant operations 7days prior to each gate shut down.

South Service Road South Plant Access 0 hours. One lane must be operational at all times during theGate construction.

South Service Road Truck Weigh Scale 0 hours. Temporary weigh scale must be operational prior todecommissioning of the current weigh scale.

Seawall Tunnel Ventilation 0 hours

Chemical Delivery (Rail) Prior to January 2019: 0 hours. No interruptions to rail delivery ofchlorine or ferrous chloride.

Following January 2019: 30 calendar days.

4

DELETE Item 3.1 .E in its entirety and REPLACE WITH

E. Contractor’s Specific Constraints

Process Plant Services Contractor’s Constraints and Responsibility

Reroute plant services Contractor must reroute all utilities and plant services in the location of, or affected by,construction prior to start of construction.

Installation of new Contractor must install new ductbank, cable pathways, associated manhole and overheadelectrical ductbank cable tray prior to pulling new cables between south substation and seawall. All activeacross south service cables between Seawall Tunnel and South Substation shall be relocated to new pathwayroad prior to installation of new secondary effluent conduit.Installation of 4.16 kV Contractor install new 4.16 kV switchgear in Seawall Substation prior to activing theswitchgear in Seawall Standby Switchboard. Contractor must install and commission components for theSubstation generators and standby power system to allow the plant water pumping station standby

electrical equipment to be active prior to decommissioning of site water tower.THES Feeder The plant will be down to 4 THES feeders around the time of this scope. As such, anyrequirements work in the Seawall substation that involves a feeder isolationlre-energization must be

limited to 12 hours during dry weather (0mm of forecasted rain). 3 THES feeders mustremain in service at all times.

Seawall Substation The Contractor must provide temporary portable heating and ventilation systems toMechanical Services maintain the space between 15°C and 35°C, water damage protection and temporary

drainage system.Request for Isolation of The Contractor shall provide a written shutdown request to the City and ContractConduits administrator in accordance with procedures outlined in Section 01040.

(Only if conduit shutdown is weather related, provide a written request to the City at least2 days prior to commencing work.)

Evacuation of Upon receiving an evacuation alarm, the Contractor shall evacuate all personnel from sitePersonnel to designated area immediately.

Isolation of PWPS Contractor must construct and install two temporary bulkheads in the existing InletInlet Channels Distribution Channel using existing bulkhead slots to provide for a safe work area and

allow for construction of permanent concrete enclosure of the existing openings toprevent effluent leakage into the construction area and into the new void space.

Installation and Minimum of one existing vertical turbine pump must be kept operational at the east flowConnection of Vertical path until new vertical turbine pumps and strainers, associated with the west pump wetTurbine Plant Water well (header), are installed, started up, tested and commissioned. Four (4) new pumps arePumps to be installed and placed in service at the west flow path. One (1) of which will be

moved to the second header when the remaining two (2) vertical turbine pumps areinstalled on the second (east) header. Completion of PWPS upgrades must occur within25 months of order to commence.

Demolition of New chemical dosing system in the Chemical Room of the Disinfection Building must beHypochlorite Storage completed and commissioned prior to demolition of the chemical storage system at theand Dosing system at PWPS and the temporary sodium hypochlorite tank.the PWPSClosure of South New detour road must be completed prior to extended closure of South Service rd.Service RdArea East of New Final The eastern portion of the former ash lagoons must be excavated, backfilled and madeEffluent Conduits available as a laydown area for the contractor under the TWAS contract within 12 months

(timing subject to change). Coordination between contractors will be required.Relocation of Buried All new buried plant services must be constructed and tested prior to connecting toPlant Services existing live plant services.

Modification of Refurbish one (1) sluice gate only at the time.Seawall Gates

Installation of The Contractor must obtain approvals from the City in written at least 7 days prior toBulkheads installation of any bulkhead into the process.

5

Process Plant Services Contractor’s Constraints and Responsibility

Access road to the The access road to the temporary truck weigh scale must be complete and free oftemporary truck weigh contractor’s equipment prior to starting demolition of the existing weigh scale.scale

Chemical Delivery The plant must remain accessible by road and by rail for the duration of construction fordelivery of chemical required for operation. Rail delivery of chlorine must be maintaineduntil January 2019. Rail delivery of phosphorus removal chemical must be maintaineduntil truck delivery connection is completed under the Phosphorus Removal Upgradescontract. Interruptions will be limited to durations as listed in subsection 0.

Construction of new Completion of the Phosphorus Removal Upgrades contract is a prerequisite forWest Bypass commencement of construction on the southern portion of the new West Bypass.

Coordination between contractors will be required.

Construction of new Ensure no service interruption to plant services at any time during UV DisinfectionUV Disinfection Conduit construction.ConduitsConnection of new 1W Final connection of new Bypass Conduit existing structures shall be done during dryDisinfection Conduits weather periods only.

Chemical Treatment of Chemical properties of the Disinfection Hot Water Heating Loop shall be compatibleHot Water Loop with and match those of the existing primary plant hot water heating system.

Storage Bins Contractor to maintain access to approximately 20 storage bins located in south-west areaof property. Contractor to move bins as required to suit construction activities and mustmaintain access to bins at all times. Bins must be located south of South Service Road.Final_bin_storage_location_noted_on Contract_Drawings.

2.3 Section 03300 — Cast-in-Place Concrete

REVISE Heading 1.11 from “TESTING OF CONCRETE” to “INDEPENDENT TESTING OFCONCRETE ON SITE”

REVISE Heading 1.11 .B. from “To facilitate testing services;” to “Contractor to provide the

following to facilitate independent testing of concrete on site;”

DELETE ITEM 1.11 .F in its entirety and REPLACE WITH:

F. Pay costs associated with testing required because of any procedures or activities that

may have adversely affected the concrete structure.

2.4 Section 03400 — Plant Precast Architectural Concrete

DELETE Item 2.1 in its entirety and REPLACE WITH

2.1 FINISH

A. Type 1 — CPCI 103 Calcite, white sand, white cement, heavy sandblast - Ribbed. Refer to

drawing 2A604.

B. Type 2 — CPCI 103 Calcite, white sand, white cement, heavy sandblast — Unribbed. Referto drawing 2A604.

6

2.5 Section 07424 — Composite Aluminum Panels

ADD Item 2.4.1.

I. PVC Thermal Break: As recommended by panel manufacturer to meet performancerequirement.

2.6 Section 08800 — Glass and Glazing

DELETE Items 2.1.D., 2.2.H., 2.2.1., 2.2.1., 2.2.K., in its entirety


2.4 INSULATING GLASS UNITS (NOTED I.T.G. ON DRAWINGS)

A. Unit Composition (full extent of Insulating Glass Units):

1. Exterior Lite: Tinted tempered glass. Basis of Design Product: Graylite II Glass by PPGindustries. Bird friendly film as described in specification section 08753 on #1 surface.

2. Air Space: 13mm dehydrated air space filled with 90% argon gas

3. Interior Lite: Clear tempered glass having Low E coating on #3 surface. Basis of DesignProduct: Solarban 60 by PPG Industries


2.5 SPANDREL INSULATING GLASS UNITS (NOTED S.P. I.T.G. ON DRAWINGS)

A. In accordance with CAN/CGSB-12.9 and as follows:

B. Unit Composition (full extent of Spandrel Insulating Glass Units):

1. Exterior Lite: Tinted tempered glass with applied silicon elastomeric coating, minimumthickness 0.4mm. Basis of Design Product for glass: Graylite II Glass by PPG industries. Basis ofDesign Product for coating: Opaci-Coat 300. Bird friendly film as described in specificationsection 08753 on #1 surface..

2. Insulation: Rigid glass fibre insulation held in place with manufacturer’s standard fixingsystem to back face of back pan.

3. Back Pan — Concealed: Galvanized metal sheet,l .6mm thickness, formed into a panshape to fit into glazing throat with back of pan flush with inside face of back section. If back panis exposed to view, attach aluminum sheet to galvanized metal back pan by adhesive, finished tomatch mullions.

2.7 Section 08900 — Glazed Aluminum Curtain Wall

Delete Item 2.6.A in its entirety and REPLACE WITH

A. Clear Anodizing for all Interior Curtainwall Frames (Class I):

7

1. All aluminum surfaces exposed in the finished work shall have integral clear anodiccoating. Basis of Design: Kawneer Clear anodized# 17. Minimum 0.7 mils thickness, andconforms to Aluminum Finish Designation AA-M1OC2YA41/AA-M45C22A41, ArchitecturalClass I.

2. Protect finish with strippable protective film.

ADD Item 2.6.D

D. Black Anodized for all Exterior Curtainwall Frames (Class I):

1. All aluminum surfaces exposed in the finished work shall have integral black anodiccoating. Basis of Design: Kawneer Black anodized# 29. Minimum 0.7 mils thickness, andconforms to Aluminum Finish Designation AA-M10C21A44, Architectural Class I.

2. Protect finish with strippabte protective film.

2.8 Section 10720 — Exterior Wall Louvres

DELETE Item 2.3.A in its entirety and REPLACE WITH

A. Storm resistant louvres, construct louvre blades and frames from minimum 2 mm thickAA6063-T5 aluminium extrusions to sizes and shapes indicated, prefinished and complete withnecessary accessories, reinforcing, flashings, fixing devices and integral wind-driven rain baffle onblades. Design basis: RS-5300 Class A by C/S.


A. Bird/linsect Screens: Crimped or intercrimped aluminium wire cloth of 6 mm (1/4”)mesh consisting of 1.6 mm (0.060”) diameter aluminium wire secured to 2.2 mm thick extrudedaluminium frame mitred at corners and secured with corner locks. Screen shall be replaceablewithin frame.

ADD Item 2.5.C

C. All aluminum parts are to be coated with corrosion resistant coating to withstand SodiumHypochlorite and Sodium Bisulfite.

DELETE Item 3.1 .E in its entirety and REPLACE WITH

E. Birdllnsect Screens: Attach screens to inside face of louvre.

2.9 Section 11240— Chemical Metering Pumps

DELETE Item 2.2.G.3 in its entirety and REPLACE WITH

3. VFD shall be calibrated and configured to display pump speed.


4. The VFD shall be equipped with a programmable function for electronic interlocking ofthe keypad by access code to prevent unauthorized adjustments to the pump parameters.

8


5. The VFD shall accept an analog signal such that pump speed is proportional to 4-2OmAor 20-4mA.

DELETE Item 2.2.G.6 in its entirety and renumber subsequent items accordingly.

DELETE Item 2.2.G.6 (formerly 2.2.G.7) in its entirety and REPLACE WITH

6. The VFD panel shall provide isolated discrete and analog signals as shown on the P &IDand Electrical Schematic Drawings.

2.10 Section 11280 — Heavy Duty Sluice and Weir Gates

DELETE Item 2.5.H.7 in its entirety and REPLACE WITH

7. RPU shall be powered from the respective breaker panel as shown on the contractdrawing.

2.11 Section 15150— Drain and Vent Piping Systems

DELETE Item 3.1.B.3 in its entirety and REPLACE WITH

3. For pipe inside the building and above ground in sizes to and including 65 mm (2½”) dia.Type DWV Type 316 Schedule 40 or lOS.

2.12 Section 15200-00 — Process Piping Systems

DELETE Section 15200-00 — Process Piping Systems in its entirety and REPLACE WITH 15200-00 — Process Piping Systems attached herein.

2.13 Section 15250— Valves and Operators

DELETE Item 2. b.C. 1. in its entirety and REPLACE WITH

1. Stainless steel body, tapered hypalon seat, stainless steel convex disc and retaining ring,flanged stainless steel frame, stainless steel acme thread non-rising type stem, stainless steelextension stem 50 mm square operating nut for floor box operation or st.st. handwheel with orwithout pedestal as indicated on the drawings, stainless steel floor box with position indicator andlid, stainless steel pedestal and stainless steel stem guides for maximum unsupported stem lengthof 1.5 metres. All fasteners and anchors shall be in 316 stainless steel.

2.14 Section 15720 — Custom Made Air Handling Units

DELETE Item 2.1 8.A.6 in its entirety and REPLACE WITH

6. Mount all safety shut downs e.g. freezestats and provide wiring to a common terminalstrip for wiring back to the Safety Alarm Panel provided by General Contractor in accordance withSection 15900.

9

2.15 Section 15810— Ductwork and Accessories

ADD Item 2.18.F and 2.18.G.

F. The thermal conductance of the overall assembly shall be less than 0.28 W/sq.m./K at 10°C mean temperature (0.05 BTU/hr/sq.ft./°F at 50 °F mean temperature). Thicker wall assembly tobe used in lieu of indicated in this Section, as necessary to meet the thermal conductance value.

G. Fire-Performance Characteristics: removable panel assemblies, including acoustic mediafill, film liner, sealants, and acoustical spacer, shall have flame-spread index not exceeding 25 andsmoke-developed index not exceeding 50 when tested according to ASTM E 84, NFPA 255 or UL723.


A. Unless otherwise specified, construct, install and seal ductwork in accordance withSMACNA HVAC Duct Construction Standards Metal and Flexible to suit the duct pressure classdesignation of 1500 pa (6” wg) positive and negative as applicable. Construct ductwork so themanufacturers gauge markings are external. Provide any additional structural steel channels,angles, inserts, beam champs and similar accessories required for hanging or supporting ductwork.Unless otherwise shown or specified, hang or support ductwork from the structure only. Minimumduct gauge is to be 26 ga. (0.55 mm). Where the ductwork is insulated, supports and hangers are tobe of sufficient length to allow the insulation and covering to pass between the hangers unbroken.

2.16 Section 16134— Raceways

ADD Item 1.7

1.7 DESIGN REQUWEMENTS

A. Cable Tray Support Systems

1. The Contractor shall select and design within the specified spans and componentrequirements.

2. Generally, cable tray supports specified to be designed, supplied and installed by theContractor are not shown on the Contract Drawings. The absence of cable tray supports and detailson the Contract Drawings shall not relieve the Contractor of responsibility for sizing and providingsupports.

3. The Contractor shall design, size, and space support anchoring devices, including lateralsupports, anchor bolts, inserts, and other devices used to anchor the support, to withstand the shearand pullout loads imposed by loading and spacing on each particular support.”

4. Cable tray design, sealed and stamped by an engineer licensed in Ontario is a requiredsubmittal under 1.5 in Section 16134.

10

3 REVISIONS TO DRAWINGS

3.1 DELETE the following previously issued Drawings in their entirety and REPLACE WITH thefollowing revised Drawings attached herein:

DWG NO. DISCIPLINE SHEET DRAWING TITLENO.

1001-2017-10-055 STRUCTURAL 1S003 TYPICAL DETAILS (SHEET 2 OF 5)1001-2017-10-098 ARCHITECTURAL 2A001 SYMBOLS, LEGENDS, WALL & ROOF

TYPES1001-2017-10-107 ARCHITECTURAL 2A201 EXTERIOR ELEVATIONS 11001-2017-10-109 ARCHITECTURAL 2A301 BUILDING SECTIONS 11001-2017-10-113 ARCHITECTURAL 2A305 WALL SECTIONS 21001-2017-10-114 ARCHITECTURAL 2A306 WALL SECTIONS 31001-2017-10-117 ARCHITECTURAL 2A309 STAR ‘A’ PLANS1001-2017-10-118 ARCHITECTURAL 2A3 10 STAR ‘A’ PLANS AND SECTION1001-2017-10-119 ARCHITECTURAL 2A3 11 STAR ‘B’ PLANS1001-2017-10-120 ARCHITECTURAL 2A3 12 STAR ‘B’ SECTIONS1001-2017-10-121 ARCHITECTURAL 2A3 13 STAIR DETAILS1001-2017-10-123 ARCHITECTURAL 2A402 ENLARGED PLANS OF GROUND FLOOR

PLAN1001-2017-10-124 ARCHITECTURAL 2A403 ENLARGED PLANS OF SECOND FLOOR

PLAN1001-2017-10-125 ARCHITECTURAL 2A404 ENLARGED PLANS OF THIRD FLOOR

PLAN1001-2017-10-128 ARCHITECTURAL 2A503 SECTION DETAILS 31001-2017-10-129 ARCHITECTURAL 2A504 SECTION DETAILS 41001-2017-10-130 ARCHITECTURAL 2A505 SECTION DETAILS 51001-2017-10-131 ARCHITECTURAL 2A506 SECTION DETAILS 61001-2017-10-133 ARCHITECTURAL 2A601 PLAN DETAILS 11001-2017-10-134 ARCHITECTURAL 2A602 PLAN DETAILS 21001-2017-10-142 ARCHITECTURAL 2A801 DOOR, LOUVRE AND ROOM FINISH

SCHEDULES1001-2017-10-23 1 STRUCTURAL 2S556 STEEL DETAILS (SHEET 6 OF 10)1001-2017-10-246 PRCOESS 2P101 EAST UPPER TUNNEL PLAN, SECTIONS

__________ AND 3D VIEWS1001-2017-10-276 PRCOESS 2P314 SAMPLING BUILDING 2 SECTION P1, QI

&S11001-2017-10-292 MECHANICAL 2M101 LOWER TUNNEL FLOOR PLAN1001-2017-10-297 MECHANICAL 2M1 13 SAMPLE BUILDING 1 & 2 PLANS1001-2017-10-298 MECHANICAL 2M121 PARTIAL SECOND FLOOR PLAN 1 OF 21001-2017-10-299 MECHANICAL 2M122 PARTIAL SECOND FLOOR PLAN 2 OF 21001-2017-10-300 MECHANICAL 2M123 MECHANICAL ROOM ‘B’ EQUIPMENT

AND PIPING PLANS1001-2017-10-304 MECHANICAL 2M501 HVAC VENTILATION SCHEMATIC1001-2017-10-325 MECHANICAL 2M532 MISCELLANSOUS MECHANICAL

SYSTEMS P&ID, SEQUENCE OFOPERATION

1001-2017-10-331 MECHANICAL 2M602 MECHANICAL SCHEDULES 21001-2017-10-417 ELECTRICAL 2E62 1 MISCELLANEOUS SCHEDULES

11

1001-2017-10-496 PROCESS 3P301 SECTION A&B1001-2017-10-479 PROCESS 3PD104 DEMOLiTION PLAN BELOW ELEV

78.8001001-2017-10-569 ARCHITECTURAL 4A201 ELEVATIONS 11001-2017-10-570 ARCHITECTURAL 4A301 DOOR SCHEDULE AND DETAILS

4 QUESTIONS

4.1 Question: Do you need FRP gate to access the tank from walkway or you need steel safety chain?

Response: The response from Addendum 6 has been revisedfrom Refcr to Addendum #6 reviseddrawing 2A403. to A safety chain and/or FRP gate is not required. Refer to Addendum 9 reviseddrawing 2A403.

4.2 Question: Specification 03300, Section 3.31.D Please confirm if precast concrete floor toppingrequires an emery shake finish.

Response: The response from Addendum 6 has been revisedfrom Yes. The precast concrete floortopping requires emery shake finish, to Precast conc floor topping will not require emery shakefinish.

4.3 Question: With regards to the “Permit to Take Water”, we have the following questions: A) Hasthe application for the Permit to Take Water been submitted? B) Will the Permit to Take water bein place at Project Commencement? C) What is the daily discharge limit being applied for?

Response: The application for the EASR (instead of the PTTW) has not yet been submitted, butwill be in place at the time of project commencement. Maximum pumping rates are outlined inSection 02140. Estimated dewatering rates are shown in Section 02140 Appendix A(Hydrogeotogy Study for EASR Submittal).

4.4 Question: Per section 1060, item 1.3.B.2; Please provide the PTTW application submitted forapproval.

Response: The application for the EASR (instead of the PTTW) has not yet been submitted, butwill be in place at the time of project commencement. Maximum pumping rates are outlined inSection 02140. Estimated dewatering rates are shown in Section 02140 Appendix A(Hydrogeology Study for EASR Submittal).

4.5 Ouestion: 11280 - Can section 2.4.D.3 be removed from the specification? This is impossible insome cases such as the weir gate (TAB-DIS-G-5 110, 5210) or will require a much larger frame.

Response: The requested change to the specifications is not acceptable. Vendors are to preparetheir quotes based on the provided design specifications.

4.6 Question: This question is in response to Addendum #5, Question 4.34. Please provide directionfor Division 13 monitoring and control requirements. We have reviewed drawings 21616 and21617 included as part of Addendum #5 response, no Ethernet Monitoring or Control requirementsare shown on the revised drawings. What is the intended function of the monitoring and controlrequirements.

Response: Card shall be for future use, all hardwired connections to be completed as perinstrumentation drawings.

12

4.7 Question: This question is regarding Section 16620, item 2.3.E. The High temperature alarm isnot shown on the P&ID drawing. Is this alarm point required?

Response: High temperature alarm to be integrated with general VFD fault signal to SCADA.

4.8 Question: Chemical Metering Pump 11240 2.2.G.3 10 Process Programming shall allow pump tobe calibrated (...) Lines 3 to 7 of pump controls section refer to a pump with an integral motorcontrol on pump like a diaphragm pump. Gear pumps are supplied with a motor only. All controlsare done in VFD. All features required will have to come from VFD (display, analog signal, faultconditions, etc.) not from the pump itself.

Response: Refer to Addendum 9 revised specification section 11240.

4.9 Question: Chemical Metering Pump 11240 2.2.G.4 10 Process Pump shall be equipped with (...)interlocking keepad. Lines 3 to 7 of pump controls section refer to a pump with an integral motorcontroL on pump like a diaphragm pump. Gear pumps are supplied with a motor only. All controlsare done in VFD. VFD will have an interlocking keepad feature.


4.10 Question: Chemical Metering Pump 11240 2.2.G.5 10 Process Pump shall accept an analog signalsuch that pump speed is proportional to 4-20 mA (...) Lines 3 to 7 of pump controls section referto a pump with an integral motor control on pump like a diaphragm pump. Gear pumps aresupplied with a motor only. All controls are done in VFD. The VFD will accept an analog signaland control the pump motor speed. Programming will have to be done in VFD. (See line 32.2.G.8)


4.11 Question: Chemical Metering Pump 11240 2.2.G.6 10 Process Pump shall be equipped with aprogrammable function for auxiliary frequency control (...) Lines 3 to 7 of pump controls sectionrefer to a pump with an integral motor control on pump like a diaphragm pump. Gear pumps aresupplied with a motor only. All controls are done in VFD. All features required will have to comefrom VFD. VFD should have some features as required.


4.12 Question: Chemical Metering Pump 11240 2.2.G.7 10 Process The metering pump have integralrelays to allow remote annunciation of fault. Lines 3 to 7 of pump controls section refer to a pumpwith an integral motor control on pump like a diaphragm pump. Gear pumps are supplied with amotor only. Annunciation of fault will come from the VFD or from the pressure switch on skid orfrom the flow meter. No fault can come from the gear pump itself.


‘3

4.13 Question: Drawing 2MPh 1 shows a floor drain system running between each UV channel. Thepiping for these drains appears to run in a void beneath the trenches and adjacent to the UVchannels. There does not appear to be any way to access these voids after the top has been poured.The piping will have to be installed before the top is on. This will make supporting the pipechallenging. Once the pipe is in place, it will be difficult to shore and form the top slab of thevoid. And of course, once the top deck is poured, the shoring and forming will not be able to beremoved from the void. Please clarify if this approach is correct.

Response: Please refer to drawings 2S504 and 21vW111 for the design intent. The followingapproach is accepted as an alternative solution to the concerns raised up in the Question: thedrainage piping system may be supported from the side walls before constructing the 500mm thicktop concrete slab. In lieu of the shoring system, this slab may be constructed with Canam steeldeck profile P3606 Type 16, nominal thickness 1.52mm, or equivalent steel deck as the formsupported by the side walls and concrete poured. The deck without any props is required to supportthe self-weight of concrete and construction loads only. Successful bidder may suggest anothersolution to Engineer’s review and acceptance during the shop drawings submittal time.Notwithstanding the chosen solution, Contractor shall carry in his/her price fees associated withanticipated challenges during pipe system installation and forming of top slab. No extra claimswill be accepted due to omitting this challenging condition.

4.14 Ouestion: Please clarify responsibility for concrete testing. Addendum 5 - Revision 2.4 andresponses to questions 4.16, 4.17 and 4.19 says verification by an independent testing agency willbe managed by the Contract Administrator. Who pays for the independent testing agency? Iscontractor only responsible for installing sensors, taking and recording readings and turning overto an independent testing agency arranged and paid for by the City?

Response: The contractor need not to pay the independent testing agency. Contractor shall beresponsible for installing the sensors, taking and recording readings and turnover to anindependent testing agency. Refer to Addendum 9 revised specification section 03300.

4.15 Question: Further to Question 9.4, 03300 1.11 .C still reads that routine testing of materials andresulting concrete will be paid by the City. Does this refer to the costs of all material testing aswell as concrete cylinder testing?

Response: Section 03300 refers to concreting. Routine testing for resulting concrete forcompliance with the technical requirements of the specifications will be paid by the city. Refer toAddendum 9 revised specification section 03300.

4.16 Question: Division 11, section 11280 page 12 of 15 item 2.5.H.7. indicates 3ph power shall beconnected directly to the actuator and the RPU should be connected through the actuator. Couldyou please clarify if this means that the RPU should not be powered by three-phases voltage andinstead powered from the actuator by 120 Vac? If the RPU is powered from the actuator in 120V/lph, this will reduce significantly the cost of the cable in this part of the project.

Response: Refer to Addendum 9 revised specification 11280.

14

4.17 Question: Regarding section 07424 Composite Aluminum Panels on Ashbridges Bay TreatmentPlant. I am trying to determine how the back system is fixed to the structure. See attached andrefer to 2.4 System Back Up Materials in the spec. Can you confirm if the gits are fixed directly tothe structure? Or is there a thermally broken clip fixed to the structure, and the girt is fastened tothe clip?

Response: Double girts are to be installed perpendicular to each other with PVC thermal break inbetween. Inner girts are to be installed directly to the structure. Refer to Addendum 9 revisedspecification section 07424.

4.1$ Question: Drawing lSOO2, Detail STD-S-017 Lays out that a minimum spacing of 2000mm fromthe corners or intersections of waits needs to be maintained for construction joint spacing.However, there are some wall sections where adherence to this detail is impossible (see the sumppit walls on Drawings 2S401 & 2S402). Please confirm that joints are either not needed or can bespaced closer than 2000mm in cases where the total length of wall from corner to corner is lessthan 4000mm.

Response: Standard detail STD -S-0 17 is applicable for long walls. Joints are not needed wherethe total length of wall from corner to comer is less than 4000mm.

4.19 Question: On DWG. #1L105, #lLlO6 & #1L107 could you please clarify area for Seed Mix Type— A & Seed Mix Type — B?

Response: Seed mix type A is to be applied to all newly graded areas other than the ditches(including both ditch slopes), and other than the low area with the gentle swale leading to the southculvert (surrounded with 78 contours).

4.20 Question: Spec Section 10720, item 2.3.A refers to a RS Series by C/S. There are a number ofdifferent models in the RS Series, various configurations and sizes, please clarify which modelnumber is required.


4.21 Ouestion: Spec Section 10720, item 2.3.A refers to a RS Series by C/S. The RS Series of louvrehas a chevron shaped blade. Detail 17 on 2A503 shows a conventional down-sloping louvre blade(non-wind driven rain resistant louvre), please clarify the shape of the blade required.

Response: Details 512A305, 7/2A305, 9/2A306, 11 /2A306, 1 2/2A306, 1 7/2A503, 1 9/2A504,25/2A505 are revised to show chevron shaped louvre blades (storm resistant). Refer to Addendum9 revised drawings.

4.22 Question: Reference Addendum 5, item 2.4.A, states that the “testing shall be provided, monitoredand recorded by the contractor”. Section 03300, clause 1.11 .C, “routine testing of materials, andresulting concrete for compliance with technical requirements of the specification, will be paid forby the City”. Also, refer to section 01400, clause 1.2.A.2. Please confirm who will pay for allconcrete testing, including trial mix test, shrinkage tests, maturity test, etc.

Response: Please refer to section 03300, Clauses 1.8 and 1.9. The concrete design mix / trial mixand corresponding test results are submitted by the contractor prior to the start of on-site concreteconstruction. This is the responsibility of the contractor and cost will not be paid by the City. TheCity will be responsible for paying for intendent testing of concrete on site per Clause 1.11. Referto Addendum 9 revised specification section 03300.

15

4.23 Question: Reference Addendum 5 Question 4.43 - As per Section 01050 Page 12 of 22, theexisting rail line to supply chlorine to the chlorine building cannot be removed ‘until thetemporary sodium hypochlorite storage is provided under the TWAS Upgrades contract.” Whenwill the temporary sodium hypochlorite storage be provided?

Response: Refer to Addendum 9 revised specification section 01050. The temporary hypochloritesystem will be installed under a separate contract. Rail delivery must be maintained for bothchemicals until January 2019. After this date, interruptions are limited to 30 calendar days.

4.24 Question: Drawing 1C134 calls for a new wall mounted Slide Gate within Manhole MH1. Pleaseprovide additional details: Slide gate sizing, mounting details, full specification includingapproved manufacturers.

Response: No further detailed drawing or specifications are required. Manhole structure invertsincluded on drawing 1C501. Slide gate to be mounted on otitlet of 4.6m-250mm0 pipe withinmanhole. Valve operator location shown on drawing IC 134.

4.25 Ouestion: Please provide the average daily flows, low flows and maximum flows at the existinglive channels for new influent channel tie-ins.

Response: Maximum flow at the existing secondary effluent conduits is 2,000 MLD. Averagedaily flows vary from 200 MLD to 81$ MLD, and flows beLow 200 MLD can be considered low atthese conduits.

4.26 Question: Please confirm if the bulkhead design for said tie-in work is up to the Contractor’s owndesigns and if a Professional Engineer seal is required.

Response: The buLkheads for tie-in work shall be designed by the Contractor and the design besealed by a Professional Engineer licensed in the Province of Ontario retained by the Contractor.

4.27 Question: Can the City provide additional chemical analysis information on the variability of thecontaminated material inside the existing ash lagoons? The degree of variability of contaminationwill have a large cost implication on disposal.

Response: Borehole information for boreholes NL-BH3, NL-BH4, SL-BHY and SL-BH2 (withinlagoons) are included in specification section 02315, Appendix A and chemical analysis inspecification section 01620, Appendix A.

4.2$ Question: When is the scheduled completion date of the Phosphorous Removal Upgrades projectadjacent to the Disinfection Building?

Response: The tentative completion date of the Phosphorus Removal Upgrades contract is Q32019. Work on the Chemical Building envelope will be completed by Q4 201$. Tunnel work willbe complete in Q3 2019. Coordination will be required as described in Section 01050, subsection1.5.C. Service interruption constraints are outlined in Section 01050, subsection 3.l.D.

4.29 Question: Drawing I C3 11 plan view shows the stormwater piping material as PVC between MH4and STC4000, however it is listed as concrete pipe on the road profile. Please clarify whichmaterial is to be used.

Response: 600mmØ storm sewer between MH4 and STC4000 to be concrete.

16

4.30 Ouestion: With reference to section 07424 composite aluminum panels. Can you confirm if theback-up z-girts are fixed directly to the structure or is there a thermally broken clip fixed to thestructure, and the girts fastened to the clip.


4.31 Question: We are one of the prequalified contractors for this tender (Ashbridges Bay EffluentDisinfection System) and Are most interested in tendering on this project. We are requesting atwo (2) week extension to the closing date in order to allow adequate time to prepare our bid.Please confirm if this request can be accommodated.

Response: The Tender Closing Date is December 7th, 2017 at 12:00 NOON (LOCAL TIME).

4.32 Question: Drawing 2S471, Section 73, and other sections that show the chamfer at the base of thechannel wall, show the use of 1 5M couplers where the wall and the slab meet. From a placingstandpoint, the detail as provided is very difficult if not impossible to connect a positional couplerto a diagonal bar as well as maintain concrete cover at these areas. Please provide a constructionsequence for these locations and comment as to the acceptability of eliminating this chamfersection or moving the construction joint so that the base slab and the chamfer section/wall base areplaced at the same time, eliminating the need for couplers in this area.

Response: The construction of chamfer is required as shown on section 73 on the drawing 2S471and cannot be eliminated. The contractor may move the construction joint up with the water-stop,so that the base slab, and the chamfer section / waLl base are placed at the same time, eliminatingthe couplers in this area. This is the best solution and will require special form work at thisinterface.

4.33 Ouestion: The precast panels on Gridline D from Gridline 17-22 do not match the panels shownon 2A201 North elevation. One example is the elevation shows a unribbed panel near gridline 22on the north side, yet the plan view doesn’t. Please confirm that the elevation panel layout iscorrect.

Response: North elevation and east elevation on 2A201 is revised to show the smooth panellocations. Refer to Addendum 9 revised drawings.

4.34 Question: Please provide a specification for the Security Kiosk and Traffic Control Arms shownon Drawing 1C143

Response: See drawings 2A702 and 2A703 and specification section 13127.

4.35 Question: The bid form allows the contractor to insert their own overall duration (Phase 3).However there is no place to provide durations of each interim phase if the contractor feels thatthe durations for Phase 1 or 2 are insufficient. Since there are significant Liquidated Damagesattached to aLl 3 phases, please amend the bid form to allow bidders to define the durations byphase.

Response: The bidders are allowed to insert their own duration for the overall Contract Time only.Durations for Phase 1 and 2 are set firmly by the City and are not allowed to be changed by thebidders in any circumstances.

17

4.36 Question: Please provide specifications and or details for the liners that are to be removed at the 2lagoons as indicated on the civil drawings. Are the liners considered to be hazardous and/orcontaminated materials, please clarify.

Response: It is unknown if a liner exists in the lagoons. Contactor to assume a liner exists fortendering purposes. Contractor to field test materials in accordance with specification section01061.

4.37 Question: Drawing 15003, STD-S-02$ provided in addendum #6, and other sections have beenreviewed by several specialty concrete reinforcing subcontractors who believe the detail is notconstructible The chamfer at the base of the channel wall shows the use of 15M couplers(A). The positional couplers (A) within the wall pour cannot be placed with enough accuracy toallow threading the diagonal bar (B) as well as maintain concrete cover at these areas whileavoiding the slab bar (D) in bent up or final position. The l5M slab bar (D) will not be able to bebent into final position with the accuracy required. Please make one of the following changes tothe detail & sequencing. 1) eliminate the chamfer and associated work from the detail. 2)Replace the 15M stab bar (D), coupler (A) & wall bar (B) with 1OM bar & couplers at a revisedspacing. Allow wall bar (B) to be straight for threading and bent to final location after the wall isplaced. Keep the slab bar (D) as being bent to final location. 3) Move the construction joint of theslab and starter wall above the chamfer, allowing the base slab, chamfer and starter wall to beptaced in the same pour, eliminating the need for couplers or bending rebar.

Response: The construction of chamfer is required as shown on section 73 on the drawing 25471and cannot be eliminated. The contractor may move the construction joint up with the water-stop,so that the base slab, and the chamfer section / wall base are placed at the same time, eliminatingthe couplers in this area. This is the best solution and will require special form work at thisinterface.

4.3$ Question: Do the transformers require HV/LV full height Air Terminal Chambers or will astandard box with bottom access plate be accepted?

Response: Full height is not required. Box shall be sized to cable/bus requirements and may not bestandard.

4.39 Question: Can you confirm which transformers require an NGR as the SLD and the written speccontradict each other.

Response: The following transformers require NGR: TR- 1512/1511 (4E605) and TR-5 115/5216(4E606). NGR not required for transformers: TR-5214/5 114 (2E601)

4.40 Question: Do the NGR’s require a 316 Stainless Steel cover or will a 304 Stainless Steel cover beaccepted?

Response: 316 Stainless is the acceptable cover.

4.41 Question: Can you please confirm the CT’s (Current Transformer’s) required for the transformersin Section 16320.

Response: Refer to drawing 4E605 and 4E606.

18

4.42 Question: The current scope of the Ashbridges Bay for Pre-cast Cladding is based on themanufacturing (width of beds) capabilities of select Pre-casters, limiting other producers toparticipate in fair and open competitive pricing. Due to this, would an alternative be accepted asan equivalent to the tender design, meeting project specifications? The alternative would simplybe a change in width of each panel to suit our manufacturing process to provide a better dollarvalue. Furthermore there are several value enhanced proposals that entail thinner panels, lowercost, and have high R-value capabilities than current design. How would the bidding GeneralContractors go about utilizing these proposals.

Response: The panels sizes are as indicated on the architectural drawings. No alternate sizes willbe entertained.

4.43 Question: In reference to the Mud Valves (Type MV 1), please advise if the stainless steel floorboxes require a valve position indicator, similar to the attached cut sheet, to allow the operator toknow valve position when opening and closing the mud valves. These have been provided in thepast to City of Toronto projects at various plants (RL Clark for example).

Response: Section 15250-2.10.C.1 has been updated to include requirement for valve positionindicator. Refer to Addendum 9 revised specification section 15250.

4.44 Question: Please confirm that stainless steel stem extensions for all valves shall be guided everyl.5m, as indicated in the MV1 specification.

Response: Confirmed. As indicated in the specification, the maximum unsupported length of theextension stem is 1 .5m. For stems exceeding this length, guides shall be placed at no greater thanthe unsupported distance.

4.45 Question: Drawing 2M101 — FN-5692 in Storage Rm E — is a grille required in the 150 x 150 ductdischarge?

Response: The duct discharge to be terminated with Type B register of 150x 150 size. Refer to theupdated drawing 2M 101.

4.46 Question: Drawing 2M101 — FN-5502 @ Col 1$-B/C — is a grille required in the 500 x 500 ductdischarge?

Response: The duct discharge to be terminated with mesh screen, as noted in the Note #10.

4.47 Question: Drawing 2M1 11 — Notes 4 and 5 — Where do they apply on the drawing?

Response: The Notes apply to the Electrical Room ‘B’ (103) ductwork risers, connectingductwork to the air-handling units on the floor above. Refer to the notes #7 & #8 on the drawing2M 121.

4.4$ Question: Drawing 2M122 — Can you please confirm that the following duct systems areconstructed from FRP: FN-5690, AHU-5630 EIA, S/A, and 0/A, AHU-5620 E/A, S/A, and 0/A,FN-56$1, FN-5682, FN-5683, FN-5684

Response: Refer to the description of the Section 158 10-3.4. All the noted in the Question systemsshall be built of FRP ductwork. Correction: Fan FN-5690 noted in the Question shall be referred toFN-5693. Correct fan tag is FN-5693, as listed on the Schedule (drawing 2M601).

19

4.49 Question: Specification section 15810— 3.4.A — Can you confirm which Room #s are defined asChemical Rooms?

Response: Chemical rooms are defined as: Sodium Hypochiorite and Sodium Bisulfite rooms.

4.50 Ouestion: Specification section 15810—2.1 Ductwork states that the minimum gauge is 26, whilesection 3.1 3.4.A Ductwork states that the minimum gauge is 24; which is correct?

Response: Description of the Section 2.1 (26 gauge) shall prevail. Refer to Addendum 9 revisedspecification section 15810.

4.51 Question: Specification section 15810— FRP Ductwork; 2.1 .J.2.A 3.4.A — is a Single WallStandard while 2.1.J.2.A 3.4.H is a Double Wall Standard — which standard applies to thisproject?

Response: Double-wall insuLated FRP ductwork is an acceptable solution for all FRP ductsrequired to be insulated. Refer to the Section 15080, Paragraph 3.7 (Ductwork InsulationRequirements — Inorganic Fibre Glass), listing ductwork sections required to be insulated.

4.52 Question: Specification section 15810—2.18 Acoustic Panels — where does this section apply onthis project?

Response: Items 2.18 & 3.17 of the Section 15810 refer to Thermal/Acoustic Removable Panelsseparating Mechanical rooms from the outdoor air intake plenums. Refer to Addendum 9specification section 15810.

4.53 Question: Specification section 15810—2.26 Filter Box — does this section apply to the filterassociated with the 1500 x 1500 Motorized Damper note 6, on drawing 2Ml23?

Response: Filter boxes are applicable to this opening, as weLl as air intake openings to theMechanical rooms A’ and ‘B’, Fire Pump Room and Sample Building 2. Refer to updateddrawings 2Mb!, 2M113, 2M122, airflow schematic 2M501 and filter box schedule on thedrawing 2M602. AdditionaL filter status 110 point was added, refer to Addendum 9 revised drawing2M532.

4.54 Question: Drawing 2M501 — CU-5600 — Does the exhaust duct connect to the exhaust air plenum(as shown on the HVAC schematic) along column 1?

Response: Correct. Refer to 3D view on the drawing 2M902 and Navisworks Model.

4.55 Question: Drawing 2M121 Plenum — The drawing notation is for a Thermal Insulated RemovablePanel, while the notation K2 on drawing 2A403 says Acoustic Panel — which is correct?

Response: The notes on Architectural drawing 2A403 and Mechanical drawings 2M121 & 2M122refer to the same Acoustic/Thermal Removable Panels. Items 2.18 & 3.17 of the Section 15810refer to Thermal/Acoustic Removable Panels separating Mechanical rooms from the outdoor airintake plenums. Refer to Addendum 9 specification section 15810.

20

4.56 Question: Drawing 2M121 — AHU-5640 return duct, 1400 x 400 to corridor — is a grille requiredon the duct inlet?

Response: No grille is required. The duct shall terminate with mesh screen. Refer to the note #26on the Addendum 9 revised drawing 2M 121.

4.57 Question: Drawing 2M122 — Note 15—fan shown in this plenum is tagged as FN-5690 — should itbe tagged as FN-5693 (Solar Wall Booster Fan)?

Response: Correct fan tag is FN-5693, as listed on the Schedule (drawing 2M601).

4.58 Question: Drawing 2M122 — FN-5693 (Solar Wall Booster Fan 750 x 350 ducts @ col 21, and750 x 750 ducts @ col. H — do these ducts terminate with an open end or do they connect to aplenum?

Response: All noted solar wall outlets shall connect to the common duct plenum terminating at thefan FN-5693. Refer to Solar Wall Ductwork 3D sections on the drawing 2M122 and Navisworksmodel.

4.59 Question: Drawing 2M501- FN-5690 (Washroom Exhaust Fan) schematic shows two manualbaLancing dampers and inlets, while the plan view on 2M122 only shows one inlet in WR A —

which is correct?

Response: Each washroom to be equipped with 150x 150 sized Type C exhaust air registercomplete with manual balancing dampers. Refer to the Addendum 9 revised drawing 2M121.

4.60 Question: Drawing 2M501- FN-5690 (Washroom Exhaust Fan) schematic shows a Fire Damperin the exhaust duct, but not on the 2M121 plan — is a Fire Damper required?

Response: Fire Damper is not required. Refer to the Addendum 9 revised drawing 2M501.

4.61 Question: Drawing 2M501- FN-5692 (PCS Room) Exhaust Fan is shown on the schematic. Thefan schedule lists FN-5692 as the Storage Rm. LTO2 Exhaust, as shown on 2M101 — which iscorrect?

Response: Schedule & 2M101 drawings are correct. Refer to the Addendum 9 revised drawing2M501.

4.62 Question: Drawing 2M501- A Fire Damper is shown on the schematic for the Electrical Room C —

205 Transfer Air Duct, but not on the plan — what is the duct size, and is a Fire Damper required?

Response: Fire rated transfer grille to be located above the Electrical room door. Refer to theupdated drawing 2M121 and schedule 2M602.

4.63 Ouestion: Dwg. 2MP 101 - Please advise where the above grade sanitary lines are going into?

Response: Sump pits. Refer to 3D view on the drawing 2MP901 for clarity.

21

4.64 Question: Dwg. 2MP 101 (Lower tunnel floor plan 1 of 2, Grid lines 5/6 & lines 14/15) - Are thesump pit new or existing? If new, please provide sump pump specs and details?

Response: Sump pits are new and built under this contract. Refer to Process drawings, schedulesand specifications for sump pumps technical info.

4.65 Question: Dwg. 2MP 121 (Grid 2/3 & I/K) - Please advise as to what the NPW line is feeding. Isthe a fixture or an equipment?

Response: Refer to schematic 2MP502 & scheduLe 21VW601 showing & listing all devices andequipment fed by NPW lines.

4.66 Question: Drawing 2MPI 11 — Layout Note 13 indicates that the standpipe mains require PipeExpansion Compensator and Guides as per Detail #3/5M503. This detail is titled ‘HotWater/Glycol Expansion Joint Detail”. Is this detail required for the standpipe mains?

Response: The detail is applicable to standpipe mains if the flanged or welded piping system isused. Use manufacturer recommended grooved flexible and rigid joints for grooved standpipesystem.

4.67 Question: Drawing 2MP501 — The fire protection schematic does not indicate a sprinkler zone forthe tunnel (LTIO1). Are sprinklers required in LT1OI?

Response: All Tunnels are not required to be sprinklered.

4.68 Question: Division 15- section 15200-00- Shop welding in accordance with ASME B31.3. UsingB3 1.3 would require categorizing each service. Please identify which category each service isdesignated as?

Response: Fluid service can be determined based on flow stream identification as noted onP&lDs. The category will be determined based on the typical contents of the pipe. The majoritywill be Normal Service or Category D Fluids. Concentrated chemical will be considered asCategory M.

4.69 Question: Full immersion passivation after fabrication required per spec 15200-3.7.B.10. Is weldjoint passivation acceptable to not damage cast carbon steel vanstones, rolled angles andgalvanized backing flanges?

Response: See Section 15200-08 for other methods of joining stainless pipes. As per thespecification, full immersion passivation is required for shop welded steel pipe. Carbon steel VanStones will not be used in conjunction with any shop welded pipe.

4.70 Ouestion: Drawing 2P101 - 400-WPS-SS connects to ex. 900 CPP- for details see process dwg?Which drawing shows that detail?

Response: Refer to Addendum 9 revised drawings 2P101 and 3PD301.

4.71 Question: Drawing 2P105- how does the 200 DRN piping from the ex. Settled sewage channelconnect to the HDPE?

Response: Refer to 2P105 Section D2. Only the spool piece penetrating slab is to be SS.

22

4.72 Question: Drawing 3P301- there are two laterals labelled as 500X250X500 but show 500 allaround. Please confirm correct sizing?

Response: The size of the two noted laterals (500x250x500) is labelled correctly. Refer toAddendum 9 revised drawing 3P301.

4.73 Question: Architectural& Structural on Effluent Disinfection Structure call for an expansion jointat gridline 16. Please define what material should be used for this expansion joint between cast inplace concrete and CMU.

Response: Please provide 32mm diameter backer rod and 12mm deep two component polysulphide sealant at this expansion joint.. This applies to detail 205, 205A on drawing 2S551 anddetail 218 on drawing 2S552.

4.74 Question: 2A601 detail 1 and 2A602 detail 2 call for backer rod and sealant at the expansion jointlocated at gridline 16 on the Effluent Disinfection Structure. Please confirm that the backer rodand sealant is only required where the storefront meets gridline F and G at openings biD, 207A,301C.

Response: Refer to Addendum 9 revised drawings 1/2A601 AND 2/A602.

4.75 Question: Caulking/backer rod and expansion joint covers have not been detailed above theground floor of the Effluent Disinfection Structure at gridline 16. Please confirm caulking/backerrod and expansion joint covers are not required at the exterior enclosure, roof, ceiling, or flooring.

Response: Please provide 32mm diameter backer rod and 12mm deep two component polysulphide sealant at this expansion joint. This applies to detail 205, 205A on drawing 2S551 anddetail 218 on drawing 2S552.

4.76 Question: 05810 Please confirm that this specification is not required due to expansion joint coverassemblies are not shown on the drawings. if required please provide details as well as locationsof expansion joint covers.

Response: Please provide 32mm diameter backer rod and 12mm deep two component polysulphide sealant at this expansion joint.. This applies to detail 205, 205A on drawing 2S55 1 anddetail 218 on drawing 2S552.

4.77 Question: 2S552 detail 218 please confirm that expansion joint, expansion joint covers, andsealantlbacker rod are not required where precast hollow core slab/topping meet a cast in placeconcrete wall at gridline 16.

Response: Please provide 32mm diameter backer rod and 12mm deep two component polysulphide sealant at this expansion joint.. This applies to detail 205, 205A on drawing 2S551 anddetail 218 on drawing 25552.

4.78 Question: Drawing 1S022, Detail STD-2-022 and STD-2-024: Please clarify the areas (forexample, water bearing, non-water bearing, exposed, backfilled etc.) where sealant is required forconstruction joints and expansion joints.

Response: All underground structures and liquid conveying / retaining structures require sealant inboth faces of walls and top face of base slab as shown on detail STD-S- 022 and STD-S-024.

23

e

4.79 Question: Per Addendum #6, 4.6, the precast concrete floor topping requires emery shakefinish. There is concern that a 2” topping would not have enough bleed water in the concrete tosaturate the hardener. Please consider using a 10mm traprock aggregate in the concrete mix ratherthan shake on emery hardener.

Response: Precast conc floor topping witl not require emery shake finish.

4.80 Question: Spec 15200-00, ci. 1.4.A: “All piping, pipe fittings, flanges, valves, hydropneumatictank, specialty items and other piping components must be registered in accordance with theOntario Regulation22o/01 Boiler Pressure Vessels and CSA standard B51-Code of Constructionand Inspection of Boiler and Pressure Vessels.” And Spec 15200-00, ci. l.4.C: “Including but notLimited to the fol1owing

This requirements applies only to systems which are subject to the Ontario Regulations 220/01;Since all but the Compressed Air system do not meet the requirement of the Act, please clarifyCRN requirements of clause 1.4 only refers to systems that are subject to Ontario Regulation220/01.


4.81 Question: Spec 15200-00, ci. 1.5.A “Product Traceability”; “All products provided under thissection are to be identified with an inspection number This requirements typically appliesonly to systems which are subject to the Ontario Regulations 220/0 1 (See s. 2. (2) of theAct). Please clarify product traceability only applies to systems which are subject to the OntarioRegulation 220/01, as well as standard industry practice for traceability, is acceptable (typically,not all products are identified with an inspection number).

Response: Inspection numbers shall be attached to all piping products for field verification.

4.82 Question: Spec 15200-00, ci. 3.3.A - PLease cLarify which ASME codes applies for each pipingsystem.

Response: Only ASME B3 1.3 applies to process piping, and is applicable to this specificationSection.

4.83 Question: Spec 15200-00, ci. 3.3.A.3 Sub-items described in this clause do not exist. Pleaseclarify.

Response: Refer to process piping schedule for list of process piping systems.

4.84 Question: Spec 15200-00, ci. 3.4.W.1: Piping Flexibility Provisions: Sub-items described in thisclause do not exist. Please clarify.


24

4.85 Question: Spec 15200-00, ci. 3.29.D: Required Weld Examinations

- Please provide code standards applicable to each system.

- B3 1.3 requires all systems to have fluids categorized. These fluid categories are designated bythe owner/consultant. Provide Fluid Service category for each system.

Response: Fluid service can be determined based on flow stream identification as noted onP&ms. The category will be determined based on the typical contents of the pipe. The majoritywill be Normal Service or Category D Fluids. Concentrated chemical will be considered asCategory M.

4.86 Question: 2A507 detail 41 indicates an angle at eievation 80.66 at the sluice gate platform tosecure the alum. Guardrail safety mesh. 2S556 detail 253 does not indicate an angle. PLeaseprovide sizing and connection detail for this angle if required.

Response: Refer to Addendum 9 revised drawing 253/25553.

4.87 Question: 2A309, 2A3 10 do not indicate what type of handrail system should be used. Pleaseindicate what handrail shown 2A3 13 is required for stair A.

Response: Refer to Addendum 9 revised drawing 2A309 and 2A3 10. Note: For all handrails andguardrails for Stair A, refer to detail 1 1/2A3 13 and specification section 05733 glazed decorativemetal railings.

4.88 Question: 2A3 11 indicates guardrail (typ.), please indicate what handrail/guardrail shown on2A3 13 is required for stair B.

Response: Refer to Addendum 9 revised drawings 2A311 and 2A312. For all handrails for Stair B,refer to Detail 1/2A3 13 & 3/2A3 13. For all guardrails for Stair B, refer to Detail 7/2A3 13.

4.89 Question: 05733 Glazed decorative metal railings is not called out on the drawings. Pleaseconfirm this specification is not required.

Response: This is used for the handrail/guardrail system in Stair A. Refer to Addendum 9 reviseddrawing 2A309 and 2A310.

4.90 Question: Drawing 2A131 in the area between D-H and 18-21 shows 3 ‘Removable FRP RoofHatches’. Please provide location in the Specifications, or a new specification, which addresses allinformation needed (e.g. sizing, supports, design, quality, etc.) for the hatches.

Response: Details 30/2A506 and 32/2A506 refers to the FRP removable roof cover assembly.

4.91 Question: The existing stockpile from RC Harris to be used to fill the lagoons after excavating, thesoils report for these soils done by Associated Engineering June 17 2014 states the excavatedlayers are mainly topsoil and fill and contain construction debris, in case these soils do not achieverequired compaction, what then?

Response: AECOM is not aware of a report prepared by Associated Engineering dated June 17,2014. Material is currently exposed and is visibly a sand-silt-gravel type material. Material wasbrought to the Ashbridges Bay site from R.C. Harris in the mid-2000’s. A geotechnical report ofthis material was completed for the R.C. Harris Residue Management Facility project by Geo

25

Canada dated January 2004. This report notes that the majority of the soil is “sand with a trace tosome silt, grading to sandy siLt”.

4.92 Question: Regarding the use of native excavated soils from this site for backfill; Section 02316item 3.3.A states:” Outside Influence areas . . . .place earth fill as follow...” The response toquestion 4.49 of addendum#6 reads: “aLl excavated soils not deemed for reuse shall be disposed ofoffsite to a registered landfill”. Will the use of any excavated materials be allowed as site fill or isall excavated material to be tested and disposed off site, in accordance with the designated

Response: It is expected that excavated material from conduits, tunnels, building, etc. constructionwill be contaminated and saturated and therefore not suitable for reuse. Excavated material fromthe stockpile located in the south-west portion of the site is expected to be suitable for reuseprimarily for partial backfilling of the lagoons and other area grading south of South Service Road.Refer to Added Specification Section 02315 — Appendix B, issued with Addendum 5.

4.93 Question: Please clarify the type of glass and specification for Seawall Substation curtain wall ‘Cl’and door glazing shown on dwg#4A201 & 4A301.

Response: Refer to Addendum 9 revised drawings 4A201 and 4A301.

4.94 Question: Reference Section 01620 3.1 .A.2 says 45000 m3 of material may be classified ascontaminated hazardous material. Are we to allow for disposal of 45000 m3 contaminatedhazardous in our base bid price, or wiLL the disposal of all material that is found to becontaminated hazardous be paid from the unit rate established in the unit rate schedule of the bidform?

Response: Estimated voltimes of excavated materiaLs for removal in specification section01620.3.1.A are intended to help the contractor in estimating contract base pricing. These volumesare to be included in the base bid price. Items listed in Section 3, Schedule of Prices is to coveralterations, extras and deductions.

4.95 Question: Reference Section 01620 3.1.A.2: Is the 45000 m3 included in the 105000 m3 stated inSection 01620 3.1.A.1?

Response: These are two separate volumes.

4.96 Question: For clarification please confirm the areas of the project where the estimated volumes of105,000 m3 of contaminated non-hazardous materials is located within the project limits,and confirm the areas of the project where the estimated volumes of 45,000 m3 of contaminatedhazardous materials is located within the project limits.

Response: 105,000m3 is from excavation for conduits, tunnels, building, etc. across the projectsite. 45,000m3 is for ash material in the lagoons.

4.97 Question: Please cLarify if the foLlowing items are to be painted: PVC piping? Insulated pipingwrapped with PVC cover? FRP ductwork? FRP stairs & railings? Hot dipped galvanized steel?Conduits at unfinished surfaces?

Response: Plastic piping shall be of colour estabLished by manufacturer, to correspond the systemit serves, as per Section 15150 (Drain and Vent Piping Systems), Item 2.2. Jacketing systemscovering mechanical systems (piping, ductwork), shall be of finish specified in the Section 15080(Mechanical Insulation), Items 2.8 & 3.9. Exposed metal & FRP ductwork, louvres and louvre

26

blank-off panels, hoods, etc. shall be of finishes listed in the Section 15810 (Ductwork andAccessories). FRP stair and railings colours are pigmented in the resin, safety yellow. Hot dippedgalvanized piping does not require painting. Conduits at unfinished surfaces does not requirepainting. Conduits at finished walls and ceilings to be painted to match the corresponding colour.

4.98 Question: Drawing 25410 - Near the transformer pad there is a call out for gatv. Steel pipe. Pleaseprovide detail of the embedment and connection to these pipes. Please confirm these are soilembedded.

Response: These posts are soil embedded as noted on drawing 25410. The design & connection ofcable tray / bus supports to these posts are the responsibility of the contractor. The layout of cabletrays / bus are shown on electrical drawings. Please refer to Addendum 9 revised specification16134.

4.99 Question: Drawing YSOO1 Note 7.1 — Please confirm that steel members are designed, steelconnections are the responsibility of the contractor.

Response: Steel member sizes are shown on the drawings except where drawings explicitly statesthat the members to be designed by the contractor. Please refer to Section 5100 Structural Steel,Clause 1.4. All structural steel connections shall be designed by the contractor.

4.100 Question: Drawing 2S4 15 Note 4 — Please provide detail of end plate connection.

Response: Please use 225mmx375mm xl6mm thick end plates welded to beam W360x79 withfour M20 bolts for this end plate connection.

4.101 Question: Spec section 15200-00, page 16 (W), it says “under sub-item 1.2.1.1.1”. Where exactlyis this sub-item located?


4.102 Question: Section 113 14.2.7 F Sway Control Rings —Please confirm how many sway controlrings are required as each sump pit will have 4 floats. Standard practice is to supply one (1) swaycontrol ring per float. Please advise if this is acceptable.

Response: Since the depth of each sump pit varies greatly for this project, there will be a differentnumber of sway rings required for each sump. The part 2.7.F was amended as follows: Swaycontrol ring — Provide one stainless steel sway control ring for each float every 2.0 m of sumpheight to reduce movement of the float switches in the sump pit.

4.103 Question: Can you please confirm if the HV and LV boxes are required to be full height tamperresistant air terminals chambers or if a standard box with just a bottom access plate is acceptable.

Response: Full height is not required. Box shall be sized to cable/bus requirements and may not bestandard.

4.104 Question: Can you confirm the NGR’s for this RFQ ... is it only required on the 10 MVA as perSection 16320 or is it required on the 1OMVA and 4/5.33MVA as per single line drawings?

Response: The following transformers require NGR: TR- 1512/1511 (4E605) and TR-5 115/5216(4E606). NGR not required for transformers: TR-5214/5 114 (2E601)

27

4.105 Question: The 13.8kV Seawall Substation Switchgear single-line shows the Toronto HydroMetering to be downstream of the Main Breakers. See drawing 4E605. Also, please see theattached Toronto Hydro Design and Construction requirements of Customer Owned High VoltageSubstations. On page 63, Toronto Hydro calls for the Metering to be upstream of the MainBreaker. Please confirm if we are to follow the Toronto Hydro standards as shown in their designrequirements. Please advise if drawing 4E605 will be re-issued to reflect this.

Response: Single line has been reconfigured to match sketch 1 (1-1) on page 66 of this THESdocument. Refer to Addendum 8 revised drawings 4E605, 4E606 and 4E607.

4.106 Question: Please provide the locations to apply intumescent fireproofing per Specification Section05100 item 2.2.D.3.

Response: Specification section 07840 fire-stopping and smoke seat parts 2.lj and 2.1k only callsfor Intumescent Pads and Intumescent Composite Sheets. Intumescent fireproofing paint is notrequired for this project.

4.107 Question: Spec section 15720 item 2.18(A)(6) references spec section 15901, this section is notprovided.


4.10$ Question: Drawing 2S421 shows item 1.2 Remove existing channel -1) Please provide the extentof removal of this channel. 2) Please confirm if this channel is a live (carrying water)? 3) if yes,then please clarify how are we handling the flow.

Response: Please see drawing 2S421 revised for Addendum 6.This channel does not carry water.This channel is a utility trench and will be redundant after the Phosphorous Removal Upgradescontract (by others). Refer to specification section 01050 for constraint details.

4.109 Question: Section 07424, we are trying to determine how the back system is fixed to the structure.Refer to item 2.4 System Back Up Materials in the spec. Can you confirm if the gits are fixeddirectly to the structure? Or is there a thermally broken clip fixed to the structure, and the girt isfastened to the clip?


4.110 Ouestion: Please provide the detail on existing condition/material of the Plant water, City water,and Fire main required to be re-routed as requested on Sequencing drawings. Please provide thedetail on Civil drawings with profile.

Response: No detailed records are available for these pipes.

4.111 Question: Drawing 1C122 - there appears a note suggesting “Fence to be removed by others” -

please confirm that is the intent and confirm the extent of it.

Response: Fence is delineating a contractors construction area. This contractor will remove thisfence prior to Effluent Disinfection System construction start in this area.

28

4.112 Question: Per section 1060, item 1 .3.B.2; Please provide the PTTW application submitted forapproval. As per our Engineers calculation - there is a significant amount of water required to bedewatered.

Response: The application for the EASR (which replaces the PTTW) has not yet been submitted,but will be in place at the time of project commencement. Maximum pumping rates are outlined inSection 02140. Estimated dewatering rates are shown in Section 02140 Appendix A(Hydrogeology Study for EASR Submittal).

4.113 Ouestion: Refer to 09675 Chemical Resistant Coatings. Please specify scope. Disinfection Bldg.Room finish schedule (2A801) indicates only epoxy flooring and floor hardener.

Response: Chemical resistant coating to be applied to the floor and side walls of containmentareas including both sumps upto ground floor level in Sodium Hypochlorite Room and SodiumBisulfite Room. Chemical resistant coating to be applied to the floor and entire height of walls inboth Chemical Fill Stations.

4.114 Question: Please provide details of the existing roof composition for the seawati substation andexisting plant water pumping station. Would as built drawings be available for these buildings?We would like to know the type of material used for disposal purpose.

Response: Refer to Attachment I — DWG — Plant Water Pumping Station and Seawalt SubstationExisting Drawings included with the Tender Documents.

4.115 Question: Please clarify if cooper cable connecting 2 contacts from new FACP to Blower buildingshown on drawing 2E70 1 should be 2-hour fire rated

Response: Cable to FACP is not required to be fire rated.

4.116 Question: Please provide type and model for traffic lighting poles shown on the drawing 1E310

Response: Square, galvanized steel pole minimum 3m height.

4.117 Question: All VFD’s shown on the drawings 2E602/2E603/4E607 as per note #2 which is “allwiring and devices within the equipment to be provided by the equipment provider” Does thismean the VFD’s are supplied by the equipment provider and not Division l3or Division 16. Asper drawing 3E607 125HP VFD’s (Qty-6) does not have the same note above. Does it mean theVFD’s are supplied by Division 13? To avoid duplicate can we ctarify which VFD’s are suppliedtogether with the equipment manufacturer and which VFD’s are supplied by Division 13 orDivision 16.

Response: All VFDs associated with the equipment shall be provided as per the contractdocuments by the General Contractor in accordance with Specifications. General contractor is tocoordinate with vendors and subcontractors to ensure VFDs are supplied as part of a package orseparately, based on the requirements of the specification (in Division 11, 15, or 16).”).

4.11$ Question: Please provide panel schedule for the panels PDP-6722/6723 & LP-2702A12701Ashown on the single line diagram 3E607.

Response: Refer to Addendum 8 revised electrical drawings.

29

4.119 Question: Please confirm that electrical contractor is responsible for supply and installation of15kV and 5kV high voltage cable run (Feed #A1/A21B19) shown on the single line diagram4E605 and South substation floor plan 1E3 1.

Response: Feeders Al, A2, B 19 shall be provided by the contractor.

4.120 Ouestion: Please provide panel schedule, number of breakers, ampacity for the following panels:A. LP-2701A B. LP-2702A C. PDP-6723 D. PDP-6722 E. LP-2754B

Response: Refer to Addendum 8 revised electrical drawings. Refer to drawing 2E606 for LP2754B.

4.121 Ouestion: Please refer to drawing 2E900 and specification section 16010 2.3 A and B andspecification section 16065 2.1 A and 3.1 AA. Can we adjust the number of down-conductors/ground rods/inspection pits to meet the coderequirements (11) and as per spec. 16010 2.3 A vs the quantity that is shown on 2E900 (24)?B. The perimeter ground loop shows 34 ground rods and 6 inspection pits which are in addition tothe ground rods shown for the LPS down-conductors. These are not required to meet the LPScodes specified. Why are they required?C. Specification 16065 2.1 A and G refer to a #22 cable. What cable is this? Can we substitutecables which meet the code specifications for cable for this Class of Installation? Spec section16065 3.1A and grounding note #1 on drawing 2E900 instruct that the installation to be to theCSA B72 Canadian LPS code. Spec section 16010 2.3B references the American NFPA code. Asthese codes are not the same, which code should be used for this project

Response: A. Number of down conductors and ground rods to be as per CAN/CSA-B72.B. Those ground rods are for building grounding. LPS ground rods are to be separate from thebuilding ground rods. Each LPS down conductor requires a separate ground rod.C. Please use latest revision of CAN/CSA-B72.

4.122 Ouestion: Drawing 4E608 shown connection to existing TAB-EL3-PDP—5 113. Please clarifyscope for electrical contractor. If electrical contractor should provide a new breaker please providetype and make of existing board

Response: Terminate feeders in existing PDP-5 113. Existing breaker shall be used.

4.123 Question: Please provide Gas control building location (existing TAB-EL3-PDP—51 13 drawing4E608)

Response: Refer to IE1O1 for location on existing digester gas control building.

4.124 Question: There appears to be inconsistencies on the required short circuit rating for the 13.8kVand 5kV Switchgear. Drawing 4E605 shows the 13.8kV switchgear to be rated for lOOkA, and the5kV Switchgear to be rated for 5OkA. The data sheets in specification 16340 show the 13.8kvswitchgear to be rated for 5OkA, and the 5kV switchgear to be 25kA. Please confirm the requiredshort circuit rating of both switchgear lineups. Please note that lOOkA is not available, and theTHES standard conditions of service for 13.8kv is 2lkA.

Response: Refer to Addendum 8 revised electrical drawings.

30

4.125 Question: There are notes on drawing 4E605 for the New Seawall Substation 5kV Switchgear thatreference this switchgear to be 13.8kv. Should it be 4.16kv? Also, the secondary of the powertransformers TR- 1512 and TR-15 11 are shown to be 13.8kV. Should this not be 4.16kV as well?

Response: Refer to Addendum 3 Question/Response 4.14.

4.126 Question: Drawing 4E607 shows the two Power Factor Correction Capacitors to be sized for600kVAR each. Drawing 3E606 shows the two Power Factor Correction Capacitors to be sizedfor 36OkVAR each. Specification 16450 article 2.1.B calLs for all 4 units to be sized for300kVAR. Please confirm the required sizing.

Response: Refer to Addendum $ revised electrical drawings.

4.127 Question: Our suppliers ask for 36OkVAR and 600kVAR capacitor banks specifications (seedrawing 3E606 and 4E607)

Response: Provide as specified, clarified in Addendum 8.

4.128 Question: Please confirm, if the alternate pile design is acceptable than what is shown on thedrawings.

Response: Alternate pile design is not acceptable than what is shown on the drawings.

4.129 Question: Q & A 4.58 addendum #6 - please provide drawings with location of plant water headerpipe, to be able to understand access for cleaning these pipes.

Response: The existing plant water header pipes are shown on the 3P and 3PD series drawings.Refer to Attachment I — DWG — Plant Water Pumping Station and Seawall Substation ExistingDrawings included with the Tender Documents.

4.130 Question: Refer to 09675 Chemical Resistant Coatings. Please specify scope. Disinfection Bldg.Room finish schedule (2A$01) indicates only epoxy flooring and floor hardener.

Response: Chemical resistant coating to be applied to the floor and side walls of containmentareas including both sumps upto ground floor level in Sodium Hypochlorite Room and SodiumBisulfite Room. Chemical resistant coating to be applied to the floor and entire height of walls inboth Chemical Fill Stations.

4.131 Question: Drawing 1ED303 has a hatch covering the existing trestle implying it is to be removedyet the notes imply it is to be re-used, thus not removed. Please clarify.

Response: Hatch indicates removal of existing cable. Trestle is to be reused as noted.

4.132 Question: 3ED314: at grid 3F ... is this a new wall?

Response: Wall is existing.

31

4.133 Question: Item D6 of demo notes on 4A001 instructs the contractor to “... for the entire building,repair any chips in precast panels ... +1- 640 linear meter ...“. Fig. 04 on 4AD 101 shows whatlooks like a mitre joint. Please provide a detail and specification outlining the procedure for therepair.

Response: Procedure to follow the CPCI Standards.

4.134 Question: Please confirm the available volume of stockpiled material (Appendix B RC HarrisStockpile) for to be used.

Response: Material from R.C. Harris has been placed on site and existing contours shown ondrawings 1C123 and 1C104 represent this placed soil.

4.135 Question: Please confirm that (Appendix B RC Harris Stockpile) all material is good for reuse onsite and does not need to dispose off site as contaminated hazardous OR non-hazardous. As thereis a separate hatched area shown as contaminated stockpile material.

Response: Yes, this material has been tested. Chemical testing in AECOM Soil Sampling ResultsLetter dated October 11, 2017 included in Addendum 5.

4.136 Question: It appears that Drawing 2A403 has been revised but not included as part of addendum 6,please provide. Addendum 6 Q & A 4.1

Response: Refer to Addendum 9 revised drawing 2A403.

4.137 Question: We are unable to find Ash lagoon chemical report as mentioned in addendum 6 Q & A4.26. is it possible to reissue that particular portion?

Response: Chemical analysis can be found on in specification section 02315, Appendix A,Appendix 3 — Tables, Groundwater Chemistry Analysis and specification section 01620, AppendixA — Soil and Groundwater Sampling Analytical Tables, Appendix 2. Boreholes NL-BH3, NL-BH4,SL-BHY and SL-BH2 are within the lagoons.

4.138 Question: Drawing 1M003 General Note #16 - asking for flush, clean, and camera inspection ofall existing drainage system - please provide the location and extent of all the pipes required to beperformed this operation.

Response: Refer to the drawing 4MD 101 indicating the piping system in the scope of work.

4.139 Question: Please provide specification for the Load Bank Connection boxes.

Response: Load bank connection box shall consist of a CSA type 4X enclosure with bus for eachphase and lugs to match cable terminations. Provide minimum of 3 times lugs for incomingtermination for future field terminations of load bank.

4.140 Question: Please provide panel schedule and ampere rating for LP-2732 panel,

Response: See drawing 3E610 for LP-2732 schedule.

32

4.141 Question: Please provide paneL schedule and ampere rating for LP-2701A, LP-2701B, LP-3752panels

Response: Refer to Addendum 8 revised electrical drawings for LP-2701A12701B. Circuits wereassigned to LP-3752A (site lighting panel) on drawing 1E202.

4.142 Question: PF Capacitor shown as 360KVAR & 600KVAR against the 300KVAR stated on thespecs. Please clarify.

Response: Refer to Addendum $ revised electrical drawings.

4.143 Question: Please clarify electrical contractor scope who supplies THES Feeder #Al (A27BN)shown on the drawing 1E313. We want to know if cable supply and install, termination is byelectrical contractor or Hydro.

Response: The feeder Al is to be suppLied, installed, and terminated by the contractor. Al feederto be spliced to THES feeder outside this scope of work within the South Substation. Coordinatewith splicing contractor regarding timing and THES coordination.

4.144 Question: Refer to spec 0922 Hydraulic seeding and drawings 1L105 and IL 106 landscape Legendregarding seeding. Two types of seed are requested: Naturepro Lowgro Native seed -Type A andWetland mix—lowland areas -Type B. It is very difficult to interpret where exactly Type BWetland Mix is to be placed from the drawings based on the description. Are the Wetland SeedMix Type B areas only for the swales? Please provide direction. Alternatively, can a quantity beprovided?

Response: Correct — Mix B is to be used within the ditches (including both ditch slopes), as wellas the low area with the gentle swale leading to the south culvert (surrounded with 78 contours).

4.145 Question: Drawing 1L106 denotes ‘Restore newly graded area with 100mm topsoil and seed ‘inthe center of the drawing. Is this reference to only the areas hashed as seeding from the legend?

Response: All newly graded areas are to be restored with topsoil and seed, not only hatched.

4.146 Question: Refer to specification 11400 Truck Weigh Scale. Please provide clarification if a steelor concrete deck is required at the permanent location, the tender states a concrete truck scalewhere as the model stated in the spec section; model VTS23 1 is a steel deck model

Response: A steel deck model is required for the permanent installation.

4.147 Question: Please provide the details for the foundation required for temporary scale far south ofthe site.

Response: The temporary weigh scale is to be a rented type or other and does not necessarilyrequire a foundation. Contractor to propose a temporary truck weigh scale solution.

4.148 Question: Drawing 1C143 refers to a new full road width automated sliding security gate. Couldyou please provide a detail for this security gate?

Response: Drawing to be read in conjunction with drawing 1E112. Gate to be 2.4m high, barbwiretop galvanized chain link fencing material, similar to new west property limit fence.

33

4.149 Question: Refer to drawing 2S521 regarding the 150mm thk void foam below the truck weighscale. Please provide product information as nothing has been provided in the specifications.

Response: Please use Geo-void 150mm deep, manufactured by Plasti-Fab Expanded Polystyrene(EPS) Product solutions or approved equal as void foam to mitigate swelling of soils below thebase slab supported by piles. Void Form shall have a minimum compression resistance of 2OkPaand accommodates a soil swell of 50mm.

4.150 Question: Refer to specification 11400. The spec states aluminum side rails, the norm is tubularsteel. Please advise if this is acceptable.

Response: Please provide aluminum side rails as specified.

4.15 1 Question: Please provide a specification for gas tight doors referred to on door schedule 2A$01.

Response: Refer to specification section 08700 finish hardware. Doors are hollow metal doors asspecified.

4.152 Question: Please add MCON as a supplier of concrete pipes, as they are currently supplying onAshbridges Bay Treatment Plant.

Response: Non named alternative equipment will not be considered prior to the Order toCommence Work. Refer to Section 5A, Clause 23 and Section 01630 of the Specifications.

4.153 Question: What kind of EPDM is requiring in 2A703?

Response: Refer to specification section 13127.

4.154 Question: Could you provide Removable FRP Roof hatch membrane info?

Response: Details 30/2A506 and 32/2A506 refers to the FRP removable roof cover assembly.

4.155 Question: What roof assemblies for 2A705 (Sampling Building #1, 2)

Response: Refer to specification section 03453.

4.156 Question: What’s patio stone materials?

Response: Refer to specification section 07520 Part 2.5.1., revised in Addendum 6.

4.157 Question: Does the excavated lagoon sediment require stockpiling and O.Reg. 347 testing or shallthe contractor assume that this material is considered hazardous for disposal purposes?

Response: Contractor to test this material prior to disposal. See geotechnical and boreholeinformation for boreholes NL-BH3, NL-BH4, SL-BH1 and SL-BH2. See specification section02315, Appendix A and specification section 01620, Appendix A.

4.158 Question: Has the south-west area stockpile been chemically and geotechnically tested (Section01010 1.4D 14-G)?

Response: Yes, this material has been tested. Chemical testing in AECOM Soil Sampling ResultsLetter dated October 11, 2017 included in Addendum 5. Geotechnical report by Geo-Canada dated

34

January 2004. This material has been moved from the R.C. Harris plant to the Ashbridges BayPlant.

4.159 Ouestion: What is the purpose of ASTM D4254 on the stockpiled material (Section 01620 3.1D-5)? Is this required for both excavated soil and lagoon sediment, or just the sediment?

Response: The purpose of this testing is to confirm excavated material and lagoon sedimentdensity for payment purposes. A unit weight of 2000kg/m3 for excavated material has beenassumed as per 01620.3.1.E.1. This information will be used to help confirm payment as materialremoved from site will be weighed (01620.3.1.E.6).

4.160 Otiestion: There is no analytical soil chemistry data contained within the Geotechnical report.Reference is made to another report entitled “Soil Management Report 124-B- 0015901-1-00-EN-R-0003-00” Is this report available for review?

Response: Chemical testing is included in specification section 01620, Appendix A.

4.161 Question: Section 01040 (1. 8A) states that no stockpiling of excavated materials is permittedwhereas Section 01620 specifies that stockpiling is permitted. Can this be clarified?

Response: Stockpiling is required for regulatory testing — no long term stockpiling is allowed.Refer to Addendum 9 revised specification section 01040.

4.162 Question: Spec section 08753 1.2A requires visible markers to be applied to all exterior glazedsurfaces, however the following coatings and films are also required as per 08800• 2.2 H Safety Decals• 2.2 I Protective coating• 2.2 J Glazing films• 2.2 K exterior finish as reflective black.Please clarify what surface requires what finish


4.163 Question: Please confirm which discipline is responsible for the supply of the Local ControlPanels for the electric actuators associated with the equipment and valves specified in Division 11and Division 15. Are these Local Control Panels to be supplied by the actuator manufacturer?

Response: All Local Control Panels for the electric actuators associated with the equipment,dampers, valves, etc. shall be provided as per the contract document by the General Contractor inaccordance with Specifications, corresponding to the system each particular panel serves, e.g.Division 11, 13, 15 or 16.

4.164 Question: Who is responsible for the supply of the Sodium Hypochlorite and Sodium BisulfiteChemical Unloading Control Panels (TAB—DIS—CP—4501 & TAB—DIS—CP-4801)?

Response: General contractor to coordinate.

35

4.165 Question: For the Vertical Turbine Pump Temporary Piping (installing the fourth pump on theWest Side of the Plant Water Pumping Station), are we to utilize the discharge valves from theEast Side, to be relocated to their permanent location in accordance with the ConstructionSequencing?

Response: Yes

4.166 Question: Section 11313 details the material requirements for the sodium hypochlorite chemicalsump pump. The shaft material for this pump is listed as 3 I6SS with a PVC sleeve. Shaft sleevesare not used in one of the specified manufacturer’s pump design; 316 stainless steel has a poorchemical compatibility rating; Hastalloy C 276 has an acceptable rating. Please advise whichmaterial should be used if a shaft sleeve is not incorporated in the pump design.

Response: The requested change to the specifications is not acceptable. Vendors are to preparetheir quotes based on the provided design specifications.

4.167 Question: Section 15200, Clause 3.7.N.lO stipulates full immersion passivation after fabrication isrequired, which is extremely expensive and will add significant costs to this tender. a. Is weld jointpassivation sufficient? b. Note that the Piping Data Sheet 15200—08 calls for Cast Carbon SteelVanstones (i.e. rolled angles and galvanized backing flanges) — these cannot be immersed in apickling solution without destroying them.

Response: See Section 15200-08 for other methods of joining stainless pipes. As per thespecification, full immersion passivation is required for shop welded stainless steel pipe. Carbonsteel Van Stones will not be used in conjunction with any shop welded stainless steel pipe.

4.16$ Question: Drawing 2P101: the 400—WPS—SS connects to the existing 900 Concrete Pressure Pipe— for details refer to Drawing ***** (no drawing indicated). Please confirm reference drawing.

Response: Refer to Addendum 9 revised drawings 2P101 and 3PD301.

4.169 Question: Drawing 2P103: where are the dimensions through the existing tunnel, from WestTunnel to where the existing tunnels turns north?

Response: Refer to the contract drawings 2A003 and 2P020. Approximate length of the northsouth tunnel is 180 m. The full set of PRU drawings will be forwarded to the successful bidderafter the tender.

4.170 Question: Drawing 2P105: Where does the 200 Drain Piping from the Existing Settled SewageChannel connect to the HDPE? There is no section view of this connection.

Response: Refer to 2P105 Section D2. Only the spool piece penetrating slab is to be SS.

4.171 Question: Drawing 3P30l: There are two (2) laterals labelled as 500 x 250 x 500, but it shows 500all around. Please confirm sizing.

Response: The size of the two noted laterals (500x250x500) is labelled correctly. Refer toAddendum 9 revised drawing 3P301.

36

4.172 Question: Section 15150 — Drains Vent Piping System:a. Item 2.2— G lists Stainless Steel as Type 316 Schedule lOS, factory or site roll grooved withgrooved end fittings.b. Item 3.1.3 — B.3 states “For pipe inside the building and above ground in sizes to and including65mm (2—½”) diameter DWV Type 316 Schedule 40. Please clarify what material is required forstainless steel drainage piping.

Response: Schedule lOS is acceptable. Refer to Addendum 9 revised specification section 15150.

4.173 Question: Piping Data Sheet 15200—17 indicates Polyethylene Flexible Hoses with RigidContainment Piping and refers to 1PEX Double Containment Piping System. Does WEX have aDouble Containment Piping System with Polyethylene Flexible Hoses as the carrier pipe and PVCSchedule 80 containment pipe? Or is this system simply Polyethytene Flexible Hoses installedwithin PVC Schedule $0 Piping utilized as containment (not a fabricated system). Are there anycasing spacers or clips required to support the hose within the piping?

Response: As shown in the contract drawings, there are two types of chemicaL piping installationin this contract: fabricated double containment piping system (e.g. PEX) and polyethyleneflexible hose in PVC pipe. Where the flexible hose is required, it is to be installed within PVCSCH8O pipe as containment and no casing spacers or clips are required within the piping.

4.174 Question: Per Section 3 - Tender Submission Package, page 3-15 “If the Bidder’s assessmentindicates that the reasonable range set out above is insufficient to complete the Work, the Biddermust notify the City no later than the deadline for questions set out in Section 2 - Information ofBidders”. Our bid schedule indicates that the completion of Phase 2 will take 210 weeks and theoverall Contract time will be 220 weeks. Please alter the Contract Time range accordingly.

Response: The City estimated Contract Time remains unchanged.

4.175 Question: Our company is looking to supply the metal storage shelving for this project and wehave run into some difficulty understanding wHyhat is required for storage room B, room 102.

The spec describes stationary shelving units, yet the layout drawings show them placed so closelytogether that they would appear to require mobile tracks for high density mobile storage.

Could you please confirm what is required for this particular room, or direct me to someone whomay be able to answer my question.

Response: These are stationary shelving units stacked in front of each other to provide enoughshelf depth to accommodate the UV bulb storage.

4.176 Question: In regards, to sizing electric actuators, please confirm that all actuators are to be sizedbased on torques for the full pressure rating of the valve. For example, actuators VF1 ButterflyValves are to be sized for Class 150B hi-directional shutoff. Confirmation of this will ensure thatactuators not undersized for this project.

Response: Confirmed.

37

4.177 Ouestion: Section 11240 1.I.B.4 — This section states there is to be one (1) control panel per pumpsystem or per skid. All the pumps on one skid are to share a control panel. However, on severalof the 2P drawings (for example 2P122) they should one control panel per pump. Which iscorrect?

Response: Refer to P&ffls 21616 to 21619 and 21621 to 21623 for designation of control panels totheir correspondent groups of chemical dosing pumps.

4.17$ Question: Section 11240 2.3.B.3.F, 2.3.C.4.F — These sections state that there is to be one (1)control panel per pump system or per skid. All the pumps on one skid are to share a control panel.However, on several of the 2P drawings (for example 2P122) they show one control panel perpump. Which is correct?

Response: Refer to P&IDs 21616 to 21619 and 21621 to 21623 for designation of control panels totheir correspondent groups of chemical dosing pumps.

4.179 Question: My purpose in writing to you today is to request permission to have IKO considered asan Approved Equal for your upcoming Ashbridges Bay treatment plant project for air/vapourbarrier systems + Through —wall flashing. Please see the attached IKO documents outlining ourequivalent air/vapour barrier + Through-wall-flashing for your consideration. The tested resultsfor our materials are located on the bottom part of the attached PDF documents. In regards toSection# 07273 in the above named project—Self Adhered Air and Vapour Barriers + accessories:1) SBS modified bitumen reinforced membrane: IKO Aquabarrier AVB- LT—(LowTemperature)2) Through Wall Flashing Membrane 40 mils: LKO Aquabarrier TWF3) Primer/adhesive: IKO S.A.M Adhesive4) Sealant —Air Barrier: 11(0 Aquabarrier Mastic


4.180 Question: Regarding: Section 11240 Chemical Feed Pumps SPD Sales Limited meets thequalifications set out in 11240 2.3 A. 1. and we will be bidding on the pump skids. The authorizedrepresentative for the single sourced “Pulsafeeder Eclipse” pumps are also a pump skid supplier.We have confirmation that they will not be offering pricing for the pumps oniy. We request thecity insist that fair market pricing for the Pulsafeeder Eclipse pumps are provided in a timelymanner to all the skid manufacturers that are interested in bidding the project.


4.1$ 1 Question: Demilec noticed that you have spray foam on the Ashbridge Bay Treatment Plant—Effluent Disinfection System. We would like to be accepted as an equal to BASF Walltite andIcynene MD-C200. We have attached our technical information and comparisons which show ourphysical properties will meet your specification requirements. If you have any questions pleasegive me a call at 1-866-437-0240 or email [email protected]. We look forwardto your favourable response.


3$

5 CLARIFICATIONS:

REVISE Add. #5, Item 2.4 - Section 03300 — Cast-in-Place Concrete

DELETE Item 1.11 .A in its entirety and REPLACE WflH:

A. Testing shall be provided, monitored and recorded by the contractor. Verification by anindependent testing agency will be managed by the contract administrator.

And REPLACE WIlEH:

Item 1.11 A: Testing will be performed by a testing agency arranged by the ContractAdministrator.

Should you have any questions regarding this Addendum, please contact Aimee Yang, Senior CorporateBuyer at 416-397-4803 or by email at [email protected].

Please attach this addendum to your RFT document and be governed accordingly. Bidders mustacknowledge receipt of all addenda on the space provided on the Tender Call Cover Page as per theProcess Terms and Conditions, Section 1, Item 9 — Addenda, of the Tender Call document. All otheraspects of the Tender remain the same.

Yours truly,

Joanne KehoeManagerPurchasing and Materials Management

39

I1JilIIORONIO 1 REVISIONS

Documents

Transcript of I1JilIIORONIO 1 REVISIONS