iJiltIORONTO Michael Pacholok Purchasing and Materials Management Division Joanne Kehoe Director City Hall, 18th Floor, West Tower Manager 100 Queen Street West Protessional Services Toronto, Ontario M5H 2N2 J_J____II1I_J,_t I _U I I Posted via PDF (1$ pages + Attachments) ADDENDUM NO.12 REQUEST TO TENDER (RET) NO. 235-2017 CONTRACT NO. 17ECS-MI-O3AB FOR: EFFLUENT DISINFECTION SYSTEM ASHBRIDGES BAY TREATMENT PLANT CLOSING DATE: DECEMBER 12, 2017, 12:00 NOON (LOCAL TIME) Please refer to the above Tender Call document in your possession and be advised of the following: REVISIONS 1.1 NO REVISIONS 2 REVISIONS TO SPECIFICATIONS 2.1 Section 01010—Summary of Work: ADD Item 1.2.C. C. Section 01010—AppendixA. DELETE Item I .4.D. in its entirety and REPLACE WITH D. Construct the new UV Disinfection facility, upgrade the PWPS and SWSS, and install a new backup chemical disinfection system. In general, the Work consists of, but is not limited to, the following: DELETE Item I .4.D.9.(B) (previously issued in Addendum #6) in its entirety and REPLACE WITH (B) Moving approximately 225 concrete blocks (800 mm x 1500 mm x 900 mm) from the berm area to the area noted in Appendix A. DELETE Item 1.4.D.19.(D)(a) in its entirety and REPLACE WITH (a) Installation of new RPU and remote I/O panels for monitoring and control of Chemical Disinfection System including but not limited to, Backup Chlorination and Plant Water Chlorination Systems and associated ancillary equipment.
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iJiltIORONTOMichael Pacholok Purchasing and Materials Management Division Joanne KehoeDirector City Hall, 18th Floor, West Tower Manager
100 Queen Street West Protessional ServicesToronto, Ontario M5H 2N2
J_J____II1I_J,_t I _U I I
Posted via PDF (1$ pages + Attachments)
ADDENDUM NO.12REQUEST TO TENDER (RET) NO. 235-2017
CONTRACT NO. 17ECS-MI-O3ABFOR: EFFLUENT DISINFECTION SYSTEM ASHBRIDGES BAY TREATMENT PLANT
CLOSING DATE: DECEMBER 12, 2017, 12:00 NOON (LOCAL TIME)
Please refer to the above Tender Call document in your possession and be advised of the following:
REVISIONS
1.1 NO REVISIONS
2 REVISIONS TO SPECIFICATIONS
2.1 Section 01010—Summary of Work:
ADD Item 1.2.C.
C. Section 01010—AppendixA.
DELETE Item I .4.D. in its entirety and REPLACE WITH
D. Construct the new UV Disinfection facility, upgrade the PWPS and SWSS, and install anew backup chemical disinfection system. In general, the Work consists of, but is notlimited to, the following:
DELETE Item I .4.D.9.(B) (previously issued in Addendum #6) in its entirety and REPLACEWITH
(B) Moving approximately 225 concrete blocks (800 mm x 1500 mm x 900 mm) from theberm area to the area noted in Appendix A.
DELETE Item 1.4.D.19.(D)(a) in its entirety and REPLACE WITH
(a) Installation of new RPU and remote I/O panels for monitoring and control of ChemicalDisinfection System including but not limited to, Backup Chlorination and Plant WaterChlorination Systems and associated ancillary equipment.
ADD Section 01010— Appendix A —Proposed Location of Concrete Blocks attached herein.
2.2 Section 01050 — Suggested Sequence of Construction:
DELETE Section 01050 — Suggested Sequence of Construction in its entirety and replace with theversion attached herein.
2.3 Section 01060 — Regulatory Requirements:
ADD Item 1.3.A.5
5. Canadian National Railway Company (CN) for rail crossing. This includes, but notlimited to the following:
(A) Work Permit Application (as per attached, for reference). The contractor shallfollow instruction and Codes of Practice detailed within the Application Package
(B) The Contractor shall arrange and complete the necessary Contractor OrientationTraining at www.contractororientation.com prior to any constructions at the railspurs.
DELETE Item I .4.A. I in its entirety and REPLACE WITH
1. Contractor shall submit to the Consultant, the design calculations, specifications,drawings and construction sequence of the shoring system, all signed and sealed by aprofessional engineer licensed to practice in Ontario.
Contractor shall also submit these documents to the City’s Building Department forapproval before commencing work on site.
2.6 Section 11313 — Chemical Sump Pump:
DELETE Item 2.4.B. 1. in its entirety and REPLACE WITH
1. LOCAL/AUTO selector switch: In LOCAL mode: Operator can start/stop the pump atthe local control panel. Provide make before break switch for smooth change over fromLOCAL to AUTO and vice versa
DELETE Item 2.6.E.5. in its entirety and REPLACE WITH
5. Provide two (2) bases with base covers, two (2) flush mounted cranes. One for each in thesodium hypochlorite and sodium bisulfite storage area
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2.7 Section 11510— Automatic Sampler:
DELETE Item 1.1 .A. in its entirety and REPLACE WITH
A. This Section covers the Work (including design, fabrication of pre-assembled packages,factory testing, supply, installation, supervision of installation, on SiteLestiIlgI’LollllltissiuIIilIgI’tlaiIIiIIg alai a uutdiiiaced desigll iesputisi’uiihy) fui tiiiee (3)automatic samplers (Tag # TAB-DIS-SP-4001, TAB-DIS-SP-4002, and TAB-DISSP5001) to be provided under this Contract.
2.8 Section 15050 — Basic Mechanical Materials, Methods and Requirements:
DELETE Heading 2.12 in its entirety and REPLACE WITH
2.12. NON PENETRATING ROOFTOP CROSSOVERJRAMP
DELETE Heading 3.24 in its entirety and REPLACE WITH
2.12. INSTALLATION OF NON PENETRATING ROOFTOP CROSSOVER/RAMP
2.9 Section 15250— Valves and Operators:
DELETE Item 2.4.B.1.(A) in its entirety
DELETE Item 2.4.B.A.(A) in its entirety and REPLACE WITH
(A) Body — full port, single piece SS cast body and topworks having stainless steelbeams/stanchions with 4 stainless steel tie rods, stainless steel yoke with self-lubricatingPTFE and brass bearings. Valve shall seal/seat on the face of the gate.
2.10 Section 15720— Custom Made Air Handling Units
Delete Item 2.6.D. in its entirety and renumber subsequent items.
2.11 Section 15770— Air Conditioning Equipment:
ADD Section 15770 — Air Conditioning Equipment attached herein
3.3 Drawing 1001-2017-10-13 1 (Sheet 2A506), add note to Detail 31A“ALLOW FOR SHELF ANGLE TO SUPPORT THE GLAZING. USE HOT-DIP GALV.SHELF L152X152X9.5 ANCHORED TO THE CONCRETE WALL WITH 16mm 0 HILTIHIT HY 200 ADHESIVE ANCHOR SYSTEM @400 C/C (MIN EMBEDMENT 150mm).”
3.4 DELETE the following previously issued Drawings in their entirety and REPLACE WITH thefollowing revised Drawings attached herein:
DWG NO. DISCIPLINE SHEE DRAWING TITLETNO.
1001-2017-10-024 CIVIL 1C135 PARTIAL SERVICING, YARD PIPING ANDUTILITIES PLAN 4
1001-2017-10-029 CIVIL IC 143 PARTIAL GRADING PLAN 31001-2017-10-031 CIVIL 1 Cl 45 PARTIAL GRADING PLANS1001-2017-10-036 CIVIL 1C152 PARTIAL SURFACE WORKS PLAN1001-2017-10-042 CIVIL 1 C502 DETAILS1001-2017-10-043 CIVIL 1C503 CHEMICAL MANHOLE DETAILS1001-2017-10-085 ELECTRICAL 1E306 SEAWALL TUNNEL TO SOUTH
SUBSTATION - NEW
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1001-2017-10-086 ELECTRICAL 1E307 SECTION THROUGH SEAWALL TUNNELTO SOUTH SUBSTATION
1001-2017-10-238 STRUCTURAL 2S601 PILE NOTES, DETAILS AND SCHEDULE1001-2017-10-25 1 PROCESS 2P106 BUTTERFLY GATE CHAMBER PLANS
AND SECTIONS1001-2017-10-252 PROCESS 2P107 UNWATERING PUMPING STATION
PLANS AND SECTIONS1001-2017-10-254 PROCESS 2P1 11 UV INFLUENT AND EFFLUENT
CHANNELS_PLAN BELOW EL._7$.33$m1001-2017-10-259 PROCESS 2P121 UV INFLUENT AND EFFLUENT
CHANNELS PLAN ABOVE EL._78.338m1001-2017-10-280 PROCESS 2P504 PROCESS DETAILS 41001-2017-10-282 PROCESS 2P506 PROCESS DETAILS 61001-2017-10-284 PROCESS 2P50$ PROCESS DETAILS $1001-2017-10-292 MECHANICAL 2Mb LOWER TUNNEL FLOOR PLAN
1001-2017-10-296 MECHANICAL 2M1 1 PARTIAL GROUND FLOOR PLAN 2 OF 27
1001-2017-10-297 MECHANICAL 2M1 I SAMPLE BUILDING 1 & 2 PLANS3
1001-2017-10-298 MECHANICAL 2M12 PARTIAL SECOND FLOOR PLAN 1 OF 2
1001-2017-10-325 MECHANICAL 2M53 MISCELLANEOUS MECHANICAL2 SYSTEM P&ID, SEQUENCE OF
OPERATION1001-2017-10-330 MECHANICAL 2M60 MECHANICAL SCHEDULES I
PUMPS1001-2017-10-443 INSTRUMENTATION 21620 SODIUM BISULPHITE TANK SYSTEM
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4 QUESTIONS
4.1 Ouestion: Reference Drawing 1E306 - The electrical duct bank and associated Manhole isscheduled within the suggested sequence as a Phase 1 activity. None of the provided drawingsclearly indicate the suggested location of the new manhole and duct bank relative to the existingrail track for delivery of chlorine. Please provide a drawing combining the design intent andiocation of the raii track. Aiso, piease advise how the constructiou of this scope, as a phase iactivity, is referenced relative to the retention of the rail track until the TWAS contract eliminatesthe need for the track.
Response: Refer to Addendum 12 revised drawing lC135. The manhole has been moved north ofthe rail spur. Refer to revision to Addendum 12 revised Section 01050 for constraints and revisionto Section 01060 for permitting and notification requirements regarding work on the rail line.
4.2 Ouestion: Presently there is missing and un-sized refrigeration piping. Please provide the locationof the missing piping and pipe sizes for the refrigeration piping required.
Response: Split AC units have been de-scoped refer to Addendum 12 revised drawings. Only theMechanical Room ‘B’ systems have refrigerant piping connection.
Refer to schematic on the drawings 2M502 & 2M535: Refrigerant piping to be used tointerconnect Condensing unit CU-5600 with air-handling units AHU-5640, AHU-5650, AHU-5660& AHU-5670. Refer to the updated Mechanical Room ‘B’ layout (drawing 2M123) showing theintent of refrigerant piping routing.
The sizes of the piping shall be determined based on refrigeration equipment manufacturer writtenrecommendations, as specified in the Section 15184.
4.3 Question: Drawing 1C151 shows Bin Storage Area - what is the scope of work for this item?
Response: This is the proposed location for City of Toronto storage bins. This area is to beconstructed with 300mm thick granular ‘A’ covering an area of 7m x 85m. Refer to specificationsection 01050.3.1.E.
4.4 Question: Drawing 1L102 shows Existing Gravel Area West of the existing Aeration tanks; samearea on drawing 1L105 asks for seeding - are we required to remove existing gravel prior to seedthe whole area? If yes, please provide the detail composition of existing condition.
Response: Space west of the Aeration tanks is the contractor’s laydown area. It is to be seededupon the completion of the construction. Refer to 02911 specification for the preparation ofexisting grade and placement of topsoil.
4.5 Question: Addendum #6 item 2.1 .B - where is the mentioned berm located? Are those concreteblocks required disposal as well? Are they considered contaminated material? If yes, what type ofcontamination?
Response: The berm is the clean fill stockpile. The sampling report for which was included inAddendum 5, as an appendix to Section 02315. Relocation of the blocks is required. Refer toAddendum 12 revised specification section 01010 Appendix A. Note that Section 01620 refers toexcavated waste and materials and not to surface items. The blocks are not consideredcontaminated material under the definitions provided therein.
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4.6 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.
4.7 Question: In order to provide sufficient time to review the Contract Documents and provide auwpetitis1e ijid, out subLolltiat.tois atal uuiseives iespi.tfuiii Lequesc a wu (2) WeeK ëAtëIISiOlI tU
the tender closing date.
Response: The Tender Closing Date is December 12th, 2017 at 12:00 NOON (LOCAL TIME).
4.8 Question: Please indicate how the grating between gridline 1 and 2 and gridline D and Eare attached.
Follow Up Question: Ok, looking at it there is actually an incorrect gridilne reference in thatquestion. The grating is shown on drawing 25415 and is between gridline I & 2, E & F.
The beam sizes are not provided and is there an angle around the perimeter to support the grating?Size of angle?
There is a similar shaft with grating shown on 2S414 at approx. gridline G117. The perimeterangle is indicated and sized but the beam sizes are not provided.
Response: Please use W200x22 beams as shown on drawing 2S407. Please provide shelf angle102x102x7.9 around the perimeter. Shelf angle shall be anchored to concrete with 16mm diameterHilti- Hit- HY 200 adhesive anchors with minimum embedment of l5Omm,spaced at 300mm C/Cas shown on drawing 2S 409. This detail is applicable for both mechanical chase A & B shown onarchitectural drawings.
4.9 Question: We have been told by one of the potential receivers of the hazardous materials, that thematerial from the ash lagoons may present a free liquids and odour problem.
The moisture content is possibly >50% in some areas that were tested. Free liquids in ash mayhave to be stabilized or dried out before shipping. Hazardous waste if too wet will discharge waterduring transport and this is illegal in Ontario or Quebec. Even if carriers line the trailers, this maynot be sufficient if the moisture content is too high. If the ash is too odorous this may also pose ashipping problem. Please confirm that bidders can assume that the ash will be able to pass therequirements for water content and odour that will allow it to be shipped as solid waste underOntario regulations.
Response: Contractor to review groundwater levels noted in the geotechnical report included inAppendix A of specification section 02315. It is expected to encounter groundwater duringremoval of the last metre of ash material (elevation 74m to .-73m). This area will need to bedewatered during excavation activities similar to other areas for conduit, tunnel, building, etc.construction. Water is to be tested, pre-treated on site as required to meet City of Toronto Sanitaryand Combined Sewer By-Law and discharged to the plant south settled sewage conduit (drawing2S100). Experience with ash material dictates that it naturally has a high water content oftengreater than 50%, drains freely similar to sand and does not pose odour concerns.
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4.10 Question: The buried double-containment distribution piping shown on the civil drawings 1C134,1C136, 1C503 are of different size, pipe material & arrangement i.e.: (SBS hose inside)..., ascompared to the process partial piping drawings shown on 2P112, 2P113, 2P313, 21614 & 21624.Please clarify the correct sizing, material & piping arrangement. i.e.: (SBS Hose inside versusSBS PVC inside pipe).
4.11 Question: Section 03400 p4 l.7A.5. “apply coloring agent” is this correct, please provide details
Response: Refer to Addendum 11 revised specification 03400.
4.12 Question: Refer to 05810 Expansion Joint Covers. Please provide direction to whichexterior/interior expansion joints are to receive the specified 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 25551 anddetail 218 on drawing 2S552.
4.13 Question: Specification section 1062 asks for H & S.
Follow Up Question: Specification section 1062 item 1.$.A asks for 10 Pre-start Health and Safetyinspection, while specification section 1400 item 1 .2.A.9 suggest that it will be provided by City.Please confirm.
Response: The PSHS inspector will be retained by the Contactor. Section 1400 item I .2.A.9 hasbeen deleted. Refer to item 2.4 in addendum #12.
4.14 Question: Refer to clause F.1 of Specification Section 01620 which states density of contaminatedHazardous material at 2,000 Kg. /m3. BHs shows high moisture content. Since ash is known to belighter than soils and sediments, please clarify stated density includes materials added to dry andstabilize. Please provide type of stabilizing agents permitted and %age by weight allowed inmixing to dry.
Response: Stated density is an assumption. Excavated material to be disposed of off-site is to betested for density (01620.3.1.D.5) prior to being transported off-site. This density information willbe used to help confirm payment as material removed from site will be weighed (01620.3.1.E.6).Experience with ash material dictates that it drains freely similar to sand and no stabilizing agentsare expected to be required in order to handle this material.
4.15 Question: 2A3l3 Detail 11 - Please confirm that Glazing Guardrail (spec 05733) is not used onthis project or indicate the locations requiring this guardrail.
Response: This is used for the handrail/guardrail system in Stair A. Refer to Addendum 9 reviseddrawings 2A309 and 2A310.
4.16 Question: Please provide details of Railroad track crossing the new Electrical manhole and aspecification for Railroad work.
Response: Existing rail to be removed as noted on drawings 1C124 and IC 125. Refer toAddendum 12 revised drawing 1C135 for the location of the manhole. Permitting requirements forthe rail line have been added to Section 01060 (refer to item 2.3).
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4.17 Question: This section indicates two (2) automatic sampler units: TAB-DIS-SP-4001 & 4002. Onthe plan drawing 2Pl 14... .there is shown another automatic sampler. Called SP-5001. That’sthree (3) in total. Please indicate three (3) samplers for this project.
Response: Refer to Addendum 12 revision to Section 11510. Three auto samplers in total. TABDIS-SP-4001 & 4002 for final effluent. TAB-DIS-SP-5001 for secondary bypass.
4.18 Question: Regarding section 15250 under knife gates B-l(A) and B(2): Is it the City of Toronto’strue intention to remove a competitive bid possibility for this product, for this contract? Doubtingthis to be the intention, the question is therefore asked. Indicating that valves modified for bidirectional service (“Uni-Directional Valves modified with wedges for bidirectional service arenot acceptable”), and valves having a true bi-directional original design (perimeter seating) are notacceptable (“Perimeter seating is not acceptable”), effectively removes any competition in thissection allowing only the first named manufacturer to be carried with any level of confidence bythe contract bidders. Please re-confirm.
Response: Refer to Addendum 12 revised Section 15250.
4.19 Question: 03481 Please confirm that this specification does not apply to this project. WindowSills and Lintels, Door Sills or Splash Pads were not found in the tender documents.
Response: Refer to Addendum 12 deleted specification Section 03481.
4.20 Question: 2A30$ Detail 19 Please provide a specification for the 3ea 914mm x 1220mm fire ratedaccess panels.
Response: Use spec section 08110 for these access panels.
4.21 Question: Specification 03300, Section 2.4.B.3 calls out steel waterstop, but there is no denotationof steel waterstop per the drawings. Please confirm that steel waterstop is not used on this project.If it is applicable to the scope of work, please denote where said waterstop is detailed.
Response: Steel water-stop is not used on this project.
4.22 Question: Specification 03300, Section 2.4.B.5 calls out the use of Sika Duoflex sealant for theexpansion and isolation joints. However, Specification 07900, Sections 2.1 .C and 2.1 .D detail anumber of products to be used at concrete joints. Please confirm that Specification 03300 Section2.4.B.5 only applies to the expansion and isolation joints and that the materials in Specification07900 are applicable to all other concrete and precast construction and control joints.
Response: Specification 03300, section 2.4 B 5. Only applies to the expansion and Isolation joints.Specification 07900 is applicable to sealing work not specified in section 03300.
4.23 Ouestion: Specification 03300, Section 2.4.5.C denotes the use of a bond breaker for expansionand isolation joints. However, the drawings do not denote the use of a bond breaker for theexpansion joints. Please confirm that bond breaker is not needed for the expansion joints as shownin Detail STD-S-022
Response: Bond breaker is not needed for the expansion joint as shown in detail STD —S-022 ondrawing 1S003.
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4.24 Question: Drawing 1S002, Detail STD-S-014 denotes the need for a bonding agent between newand existing concrete. Please confirm that latex bonding agent is acceptable. If not, please providespecifications detailing which bonding agents should be utilized in this application.
Response: Latex bonding agent is applicable.
4.25 Question. Please teissue die diawiug ilideA as tue utawulig tIUIiIUetS ill Like illUeA UU 1101 tëHëCl tile
new drawing numbers provided in previous addendum revisions. For example, see Drawing21601, Addendum 5
Response: Issued for Tender index is correct. Drawings 21601, 21616 and 21217 issued forAddendum 5 have incorrect drawing numbers. Updated issued for construction drawing set will beprepared after tender.
4.26 Question: Specification 03410 3.4.C This specification calls to grout joints and caulk as shown onDrawings. The drawings do not call for grout or joint sealant at the hollow core key joints. Pleaseprovide a detail and specification of grout and caulking the hollow core key joints if required.
Response: The details for hollow Core slabs joints are shown on STD-S-041 on drawing 1S005.The details show grout. Please use Non-shrink hydraulic cement grout specified in clause 2.2 inSection 03600, for grouting these joints.
4.27 Question: Specification 03410 2.1.J This specification calls to grout per 03300. Specification03300 does not specify grout for precast hollow core. Please provide specification of groutrequired for precast hollow core detailed on Addendum #6 lSOO5 STD-S-041.
Response: Please use Non-shrink hydraulic cement grout specified in clause 2.2 in Section 03600,for grouting these joints.
4.2$ Question: 1S004 10.9 This note calls for 750 long vertical bars with 150 embedment to concrete.Please clarify if this note is intended to work in conjunction with 2A403 W7 walls on the secondfloor. This will require breaking the hollow core and grouting the 750mm long dowels.
Response: This note is not intended to work in conjunction with 2A403 W7 walls on the secondfloor. These walls shall be reinforced with horizontal block wall reinforcement as shown on STDS-035 on drawing lSOO4. W7 shall be extended and laterally supported at top as per section C /STD-S-032, on drawing 1S004.
4.29 Question: Specification Section 15720: Page 6, Item 2.6, C & D. Please confirm what kind ofwheel is applicable (required) for Plenum fan.
Response: All Plenum fan wheels shall be as indicated in the Paragraph C. Refer to Addendum 12revised specification section 15720.
4.30 Question: Please confirm all handrail/guardrail in Stair A is glazed decorative railing. Specificallythe East wall throughout the stairwell.
Response: Refer to Addendum 9 revised drawing 2A309 and 2A3 10.
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4.31 Question: Drawing 1 S005, DetaiL STD-S-041 Side Bearing on Steel Beam. Please confirm thatanchors are only needed at the outermost beams, where the coreslab panels end, and not at everyintermediate beam where panels continue past the beam.
Response: Correct. Anchors are needed only at outermost beams where the core-slab panels end.
4.32 Question: When will the railroad tracks be removed in the Phosphorous Removal UpgradesProject? This will ultimately cutoff the possibility of rail delivery for chemicals and could have animpact to the schedule for this project and its constraints.
Response: Refer to drawings 1C124 and 1C135 for the extent of rail spurs to be removed underthis contract. Constraints on chemical delivery by rail are outlined in the Addendum 12 revisedSection 01050, subsection 3.1.D. Modifications the railroad spurs under the PRU contract shouldnot have impact on the schedule for this project.
4.33 Question: Drawing 1C501 Note 38 and drawing 1L106 Note 1 both state that all disturbed areas tobe restored with seed on 150MM of topsoil, while the note in the middle of drawing 1L106 statesto restore newly graded areas with 100MM topsoil, please clarify the topsoil thickness for all theareas required to be restored.
Response: Disturbed areas to be restored with 150mm of topsoil and seedlsod as noted on thedrawings.
4.34 Question: Reference spec 11280: 1. Gates TAB-DIS-G-5 110, 5210 only have enough room totravel past the fully open position by 1”. To ensure access to the bottom seal for maintenance orrepairs, an additional 5” is required (mm. 6”) IN ADDITION TO PROVIDED POCKET. Is thispossible? (previous question already submitted, now with additional statement for clarification.
Response: Refer to Addendum 12 revised drawing 2P50$
4.35 Question: Reference spec 11281, 2.4.H.1 Bulkheads:1. Are storage racks to be 316 s.s. or 304 s.s.? Spec calls for 304 but schedule shows 316.2. Which of the 2 locations for storage racks will be used for which bulkheads? This will affect thesize of each rack.3. Where will Bulkheads type $ and 9 be stored? They are not located near the 2 storage racklocations on dwg. 2P121.
Response: 1. Material of construction for storage racks for bulkheads and stop logs to be 316Stainless Steel. Specification section 11281, part 2.4.H.1 to be amended to read 316 st.st.2. The bidder is to design each storage rack using process drawings and specifications. The storageracks may be refined during shop drawings review with no change to the quantity of material usedfor construction.3. A storage rack has been added. Refer to Addendum 12 revised drawing 2P106.
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4.36 Question: Questions related to Section 11313:2.3 A-Material add the following - or Fiberglass (FRP)VR-1 or yR-i BPO DMA2.3 E-On the drawings No flush water lines are shown for Pumps P470 1 and P4801. Advise if thisis correct2.7 A.3 Please remove the requirement for ShaftsWe are supplying corrosion resistant Shafts that when properly maintained do not corrode for anextended period of time. They are not even a recommended spare for 5 years operation. Due to thedesign of the Fybroc pump the shaft bearing wear areas can be changed if significant wear occursdue to poor maintenance of flush fluid failure. A Titanium and Alloy 20 Shafts represent asignificant expenditure for no reason
Response: Suggested changes to the specification are not accepted.
4.37 Question: Chemical Sump Data Sheet IShaft Material: 31655This Material is not corrosion resistant to 12% Sodium Hypochlorite so we request that it becorrected to Titanium which is corrosion resistantShaft Sleeve: PVCWe request that no Shaft sleeve be installedPedestal Base Material: Stainless SteelWe request since the pedestal is mounted above a corrosion resistant mounting plate that it beManufactures standard Cast Iron Epoxy CoatedMotor Horsepower.Due to Fybroc’s higher Efficiency we request the use of a motor based on a non-overloadingdesignThis wilt reduce electrical energy consumption by at least 50%
Response: Suggested changes to the specification are not accepted.
4.38 Question: Chemical Sump Data Sheet 2Shaft Material: 31 6SSThis Material is not corrosion resistant to 38% Sodium Hypochlorite so we request that it becorrected to Alloy 20 which is corrosion resistantShaft Sleeve: PVCWe request that no Shaft sleeve be installed since Alloy 20 is corrosion resistant to the SodiumBisulphite SolutionPedestal Base Material: Stainless SteelWe request since the pedestal is mounted above a corrosion resistant mounting plate that it beManufactures standard Cast Iron Epoxy CoatedMotor Horsepower.Due to Fybroc’s higher Efficiency we request the use of a motor based on a non-overloadingdesignThis will reduce electrical energy consumption by at least 50%
Response: Suggested changes to the specification are not accepted.
4.39 Question: Some of the drawings issued with Addendum 9 did not print clearly. It appears thingsare stretched (Ex. wall types on 2A001, area around clouded revision on 2A301, stairs andhandrails on 2A3 12), information missing (wall sections 2A305), details on 2A503 are wonky,etc. (see example below) Please reissue drawings.
Response: Drawings are as posted and will not be reissued.
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4.40 Question: Drawing 1C143 has a callout for 2 parking spots, please clarify if parking blocks andstriping is required. If so, please provide specifications and details.
Response: Contractor to provide pavement marking for parking areas as displayed on thedrawings. Marking to be solid yellow OPSS 1712 organic solvent based traffic paint.
4.41 Questiuti. Diawitig iCi4 has a caiiuui fiji new aspiiaii paikitig, atid tiieie is 5 spaces siiuwn,
please clarify if parking blocks and striping is required. If so, please provide specifications anddetails.
Response: Contractor to provide pavement marking for parking areas as displayed on thedrawings. Marking to be solid yellow OPSS 1712 organic solvent based traffic paint.
4.42 Question: In regards to drawing IC 135, please provide elevations for the firemains, forcemains,and plant water services.
Response: Exact elevations of existing buried piping are unknown. Contractor to follow minimumcover on buried piping as per note 2$ on drawing 1C501 unless otherwise noted on the drawingsor specifications.
4.43 Question: When will the rail spur be removed in the TWAS contract?
Response: The rail spurs will be removed under this contract (refer to drawing 1C124).Constraints on chemical delivery by tail are outlined in Section 01050.
4.44 Question: Please clarify the portions of the rail that must remain open for chemical deliveries, i.e.the entire length of track. The question is being asked because of the new services that have to beinstalled and existing services that have to be removed in Phase IA and lB on the phasingdrawings that are directly below the rail spurs. In order to install and remove these services the railspur must be removed.
Response: Refer to the Addendum 12 revised Section 01050. Prior to January 2019, all raildelivery is to be maintained, with the exception of 30 day interruptions to chlorine delivery.Following this date, only the spurs to the chlorination can be removed, as shown on drawing1C124 and 1C125.
4.45 Question: According to Section 3, the Schedule of Prices is to cover alterations, extras, anddeductions, if the contaminated non-hazardous materials and contaminated hazardous materialsunderrun the 105,000 m3 and 45,000 m3, will the unit price be applied to the underrun quantityand be deducted from the contract amount?
Response: Yes, it will.
4.46 Question: Please confirm that Section 3, Schedule of Prices Items 1 and 2 are only applicable toquantities that overrun the 105,000 m3 and 45,000 m3 and will not be applicable to underrunquantities. i.e., our takeoff indicates that the contaminated hazardous materials to be excavatedfrom the lagoon underrun the 45,000 m3 by about 9,000 m3.
Response: Items 1 and 2 in Schedule of Prices (Section 3) are applicable to both overrun andunderrun the quantities under the base scope of the Contract..
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4.47 Question: Due to the large number of outstanding questions not yet addressed by addendum, andallowing time for bidders to distribute answers subcontractors I suppliers and incorporate answersinto our bid, please extend the closing date by an additional 2 weeks.
Response: The Tender Closing Date is December 12, 2017 at 12:00 NOON (LOCAL TIME).
4.48 Ouesdoii. Diawitig ii shows Iwo tettipotaty bulkheads - do we iteed divets to iitsiithh thesebulkheads? Does the channel contain liquid?
Response: Since condition of the existing bulkhead slots in this area is unknown, as worst casescenario, please allow for 2 days of diving service. The liquid is secondary treated effluent.
4.49 Question: Please confirm which pipes are steel pipe cement mortar lined as mentioned inaddendum6-Q&A4.27.
Response: There are no steel pipe cement mortar lined pipes in this contract. Please refer to PipingSchedule and other applicable piping specifications in DIV 15.
4.50 Question: Please confirm the Electrical requirement for temporary truck scale and permanenttruck scale; as this information is missing from the drawings.
Response: A 30A 208V single phase connection is required. Provide permanent connection fromLP-2705A.
4.51 Question: Please provide specification for exit lights Type XI, X2, X3
Response: Refer to specification for “X-series” on the luminaire schedule, drawing 1E004.Otherwise Exit signs shall meet all requirements of CSA C22.2 NO. 141 and OBC requirements.
4.52 Question: Please provide specification rating and capacity for the DC battery cabinet BATT-6 102shown on the drawing 4E607
Response: DC battery cabinet shall be rated for 100A output and shall provide quantity of batteriessuitable for 24 hours standby operation of loads including:1. Standby for all equipment under normal operating conditions, and2. 100 trip/reset operations
4.53 Question: Please advise requirements for the cable tray (class and side rail height)?
Response: Cable tray side rail height shall be a minimum of 150mm. Cable tray class shall followthe requirements outlined in 16134 Section 2.3.
4.54 Question: With respect to the Pipe Pile Driving shoes specified on Drawing No. 1001-2017-10-23$, the designer has specified a driving shoe thickness that is equal to 25mm and a platethickness for the welded Cross (X) to be driven at the leading edge of the pile that is equal to12mm. Is the designer comfortable with this driving shoe given the Allowable Pile Capacities?
Response: Please use 20 mm thick plate instead of 12mm thick plate for the driving shoe shownon drawing 2S601, to allow for hard driving in shale and intact rock.
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4.55 Question: Knowing the fact that water density is around 1000 kg/m3; please confirm that 2000kglm3 provided in the tender documents is the blended average density of lagoon hazardousmaterial including water and solids.
Response: Yes, this density includes water and solids.
strictly utilized for characterizing stockpiled soil for the purposes of re-use and not hazard level.In our experience, the number of samples for TCLP (0. Reg 347) to determine hazardclassification is dependent on the requirements of the receiving facility, and is expected to be at amuch lower frequency than what is specified in Table A (i.e. I sample for each 5,000 or 10,000m3). It’s our opinion that the sampling of each stockpile for TCLP as per Table A is too onerousand subsequently will create unnecessary additional costs.
Response: Agreed. Purpose of sampling is to establish hazard classification to then determine adisposal location. Contractor to perform sufficient sampling to the satisfaction of the receivingfacility.
4.57 Question: Is it assumed that 45,000 m3 of soil is classified as hazardous because of asbestoscontent? If so, is asbestos sampling required for all excavated and stockpiled material?
Response: The 45,000m3 of ash material to be excavated and disposed of off-site is expected to behazardous. Excavated materials found to have leachate concentrations exceeding the LeachateQuality Criteria will be classified as hazardous (0l620.3.1.D.7).
4.58 Question: Is bulk analysis for the purposes of re-using potentially non-contaminated soil requiredfor this project or shall it be assumed that all soil is contaminated and the testing is only todetermine the hazard level of excavated material?
Response: Assume all soil is contaminated with exception of previously imported material fromthe R.C. Harris site. Testing by the contractor to determine contamination level and thereforedestination for disposal.
4.59 Question: Section 07520 item 2.5.K Roof walkway and Rooftop Walkway Section 15050 item2.12 are different material - is that the intent.
Response: Refer to Addendum 12 revised Section 15050, Items 2.12 and 3.24 have been renamedwith reference to a “NON-PENETRATING CROSSOVER] RAMP”. This refers to the itemsindicated on the drawing 4MPll 1 only. Roof walkway as noted in 07520 to be used for the roofwalkway slabs.
4.60 Question: Removal of Hazardous material from lagoons may require separating water from Ashbefore off-site disposal. Please confirm that the separated water volume is part of 45,000 m3 ofcontaminated hazardous material to be carried in the base bid.
Response: Water separated from ash to be pumped to the dewatering discharge point at the plantsouth settled sewage conduit (drawing 2S 100), similar to other dewatering activities for conduit,tunnel, building etc. construction. Water is to be tested and pre-treated on site as required to meetCity of Toronto Sanitary and Combined Sewer By-Law. 45,000m3 is only for excavated material tobe disposed of off-site. Contractor to include all costs associated with this work in the base bid.
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4.61 Ouestion: In response to Q & A 4.133 of addendum #9 please confirm that the all joints 640 m tobe removed and replaced will be paid under which specification section.
Response: Contract asks for the removal and replacement of the joint sealant and backer rod.General contractor to coordinate.
samplers (TAB—DIS—SP—400 1 & TAB—DIS—SP—4002) & Drawing 21624 indicates one sampler(TAB—DIS—SP—5001), and Specification Section 11510, Clause l.1.A indicates there are two (2)automatic samplers (Tag # TAB—DIS—SP—4001 and TAB—DIS—SP—4002). Please confirm thequantity of Automatic Samplers under this contract.
Response: Refer to Addendum 12 revision to Section 11510. Three auto samplers in total. TABDIS-SP-4001 & 4002 for final effluent. TAB-DIS-SP-5001 for secondary bypass.
4.63 Question: Section 11311, Clause 2.6.D.1 indicates “The Contractor shall provide two (2) portabledavit cranes” and Clause 2.6.E.5 states “Provide eight (8) bases with covers, two (2) flushmounted cranes bases for installation in the new Stage 1 and 2 Disinfection Facility and additionalsix (6) upright crane bases provided loose to the Region.” This is a significant amount of LiftingDavits and Bases for two (2) Chemical Sump Pumps. Are these items specified in the incorrectlocation? Should they be specified in Section 11314 or Division 14? Please advise.
Response: Refer to Addendum 12 revised specification Section 11313.
4.64 Question: Drawing 2P504 Level Probe General Arrangement — Does this detail apply to the levelfloats supplied under Section 11314?
Response: Level Probe general arrangement shown on 2P504 does not apply to level floats undersection 11314. The detail applies to LSHH-4003 and LSHH-4004. Refer to Addendum 12 reviseddrawing 2P504.
4.65 Ouestion: Air Conditioning Units (TAB—DIS—AC—5610, TAB—DIS—AC—5620 & TAB—DIS—AC—5630) and Air Condensing Units (TAB—DIS—CU—5610, TAB—DIS—CU—5620 & TAB—DIS—CU—5630) are shown on Drawing 2M601 and list Mitsubishi as the manufacturer, yet do not appear inDivision 15 of the specification. Please provide specification.
Response: Section 15770 (Air Conditioning Equipment) has been issued as part of the Addendum#11.
4.66 Question: One of the named manufacturers for Section 15720 — Custom Made Air Handling Unitshas proposed the following questions:a. Section 15720: Page 6 — 2.6 — Point C & Point D: Please confirm what kind of wheel isapplicable (required) for Plenum fan.b. Section 15720: For Vestibule Unit AHU—5520 & AHU—5530 — Please confirm if piping workfor coil inside the vestibule is to be provided by the AHU manufacturer. If yes, who will providethe control valve and actuator if any needed.
Response: a. All Plenum fan wheels shall be as indicated in the Paragraph C. Delete Paragraph Dfrom the Section.b. It is up to Contractor to make all necessary arrangements with subs and manufacturer to provideall piping connections to the air-handling units’ coils. In any situation, the piping system shall beprovided in accordance with the Sections 15181 (Glycol Solution Heating Piping System) and15080 (Mechanical Insulation), with control valves provided in accordance with the Sections
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15720-2.18 (Custom Made Air Handling Units) and 15900 (Automatic Controls). For pipingarrangement and all necessary accessories refer to the drawing 5M507.
4.67 Ouestion: Section 01050— Suggested Sequence of Construction Clause 3.1.E table indicates thatthe Installation and Connection of Vertical Turbine Plant Water Pumps and Completion of PWPSupgrades must occur within 25 months of order to commence. However, the timeline for Phase 01ol inc WOrK 15 Oib Lalenuar uays 94 Weeks). tiease uiiiirm wnicn timeiine is appiicaoie 10 tnePWPS Upgrades.
Response: Refer to the Addendum 12 revised Section 01050. Reference to 25 months has beenremoved.
4.68 Ouestion: Refer to Addendum 9, item 4.41: Reference to drawings 4E605 and 4E606 do not showthe CT’s for the transformer only the NGR and Switchgear. Can you please clarify the LV andHV CT’s (with quantities) for these Transformers (1OMVA, 4/5.3MVA & 2/2.67MVA).
Response: Refer to breaker/relay schematics in the 4E6xx series drawings for connectionsbetween transformer CT and relays.
4.69 Ouestion: Refer to Addendum 9, item 4.42: There are contradictions present on the drawings. Thetypical panel sections states the panel width as 1450* (there’s no reference to the * on drawing).
Floor plan dimensions show a specific number of panels per elevation, and when you calculate itout it gives the panel width as 1475.This calculation repeats across most elevations and should be the correct width. Should I assumethat value as the new standard panel width and qualify it on the letter? The concern is that youwere very specific in the addendum responses that the detail shown is to be the exact panel size.
Response: The detailed panel sizes are typical representation. * means these dimensions are
adjustable to suit the column grid layout.
4.70 Ouestion: Drawings 1001-2017-10-693 - 1001-2017-10-695 show a 3 door Hammond panel.Hammond does not make a panel the size that is showing on the drawings (1830mm H x 2845mmW x 611mm D). They do make a stock enclosure that is 2188mm H x 2845mm W x 511mm D,part # 1422MD320. Is the stock enclosure acceptable or do we need to get a custom enclosure forthe size showing on the drawings?
Response: Refer to the drawing 1001-2017-10-691 Note 5 for the acceptable enclosuremanufacturers. The contract drawing shows a typical panel layout and as per Note 1, the panelshall be sized to suit panel requirements as per the Contract documents.
4.71 Ouestion: Also, on this enclosure drawing as well as the rest of the RPU panel layouts, there areviewing windows shown on the drawings. These viewing windows are not on any of the bill ofmaterials, nor is a size shown. Can a part number or size be provided for these viewing windows?
Response: Viewing windows shall be sized and provided as per the Section 133 12.2.A EnclosureAccessories.
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4.72 Question: Looking into addendum #9, question/answer 4.16 (page 14) indicates: Refer toAddendum specifications 11280; however, revised specifications are for division 15 only(Document attached downloaded from the city website). Where can I find revised specification11280?
Response: The specification was not revised in its entirety. See the revision made in Section 2 ofAddendum ‘.
4.73 Question: In addendum 11 questions 4.34 through 4.40 the response was “Refer to addendum 10specification revision x”; however, in addendum 10 (see attached) it states there are no revisionsto specifications. The only item in Addendum 10 was the extension to closing date. Could youplease advise if there are missing items for addendum 10?
Response: “Refer to Addendum 10” should be replaced with “Refer to Addendum 11”
4.74 Question: It’s not a question about the project. It’s actually about a missing document (I think)that is mentioned in the addendum but is not in the City portal.
Specifications 11280 are not in the attachments... Are they someplace else??In addendum 11questions 4.34 through 4.40 the response was “Refer to addendum 10 specification revision x”;however, in addendum 10 (see attached) it states there are no revisions to specifications. The onlyitem in Addendum 10 was the extension to closing date. Could you please advise if there aremissing items for addendum 10?
Response: The specification was not revised in its entirely. See the revision made in Section 2 ofAddendum 9.
4.75 Question: Page 51506 MultiLink Panel item 11 UPS the born’s it says refer to section 13326—Iwent there and I don’t see a VA rating listed — do you know what it is?
Response: Refer to the enclosure layout on the 51506. The UPS box shows VA rating.
4.76 Question: drawing 51703 typical BOM for TAB-DIS-RPU-073 1 item 20 part# PW9 I 3-XXXXthen says size to spec. I don’t see a VA rating listed — do you know what it is?
Response: UPS for the RPU panel shall be sized according to the specification Section 13326.Refer to the requirements in Section 13326.1.2 for UPS sizing.
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.
