bid clarification #1 bc3_steam_an… · please confirm that cathodic protection is required for the...

BID CLARIFICATION #3

April 16, 2010

DUE DATE: April 22, 2010

TIME: 2:00 p.m.

PROJECT: Steam and Condensate Distribution System Improvements

PROJECT NO: 901421

LOCATION: University of Connecticut

Capital Projects & Contract Administration

31 LeDoyt Road

Storrs, CT

Attn: Walt Dalia

Please note the following information must be incorporated into your bid for the Steam and Condensate

Distribution System Improvements, Project #901421:

1) Attached is the RFI Response Log dated 4/15/10. (3 Pages) 2) Attached is Addenda #1 from Fuss O’Neil. (2 Pages) 3) The Boring Report, Appendix A is being replaced in its entirety. ( 5 Pages) 4) Spec Section 33 41 00 & 33 63 00 (2 Pages) 5) Attached are the following Sketches: SK-MP507.1/SK-MP507.2/SK-MP403.8/SK-3/SK-

4/SK-5/SK-6A/SK-6B (8 Pages)

The University of Connecticut Bid Submission Requirements:

All bidders must submit their Form of Proposal along with all required forms and any associated bid clarifications as your firm’s bid proposal. All required forms must be

completed.

All bidders must initial the bottom of each page within their bid proposal and associated Bid Clarifications attesting to the fact that you have reviewed, read, understood, and accepted the

information and terms and conditions within, without exception.

YOUR BID PROPOSAL MAY BE CONSIDERED NON-RESPONSIVE AND MAY NOT BE REVIEWED FOR FAILURE TO SUBMIT ALL OF THE ABOVE DOCUMENTATION

(ALONG WITH ANY OTHER DOCUMENTATION DETAILED IN THE BID

DOCUMENTS AND SPECIFICATIONS)

All bid awards must be approved by the University of Connecticut. After review of all factors, terms and conditions, including price, the University of Connecticut reserves the

right to reject any and all proposal, or any part thereof, or waive defects in same, or

accept any proposal deemed to be in the best interest of the University of Connecticut

University of Connecticut Walt Dalia, Purchasing Agent I

Steam and Condensate4/15/2010 16:01

Project #901421

RFI No. Question Response

1Form of Proposal: For Unit Price #1, are we to carry the quantity of 1,100 CY Rock Excavation in our Base Bid?

No rock excavation shall be included in the base bid. If rock is encountered it will be paid for with the unit price provided.

2Form of Proposal: For Unit Price #2, what type of contaminated material are we to price for disposal?

See Appendix B for FOSB-101 for the type of contaminated material to price for disposal.

3 What are the dimensions of the concrete vaults that are to be demolished?

See Bid Clarification #12 for sketches relating to the dimensions of the concrete vaults to be demolished.

4 What is the depth of the existing pipe to be removed?

See Bid Clarification #13 for profiles and existing drawings relating to the existing pipe to be removed.

5MP-507: What are the dimensions of the Dedicated Steam Tunnel Ventilation Intake Manhole?

See Bid Clarification #10 for SK-MP-507-1

6MP-507: What are the dimensions of the Dedicated Steam Tunnel Ventilation Relief Manhole?

See Bid Clarification #11 for SK-MP-507-2

7Appendix A: The boring logs supplied are for South Campus. Is there a boring log for this leg of the work?

See Bid Clarification #8 for a revised Appendix A. The borings in the bid package are not for this project.

8

MD-101: Several runs of pipe have notes attached that state "pipe insulation may contain asbestos". Do these runs contain asbestos? Should we be including monies in our bid for work that may not be there?

The exact scope of asbestos cannot be determined until demolition is in progress. Assume all existing steam and condensate pipes, (except within vaults) are insulated with material containing asbestos.

9

Specification Section 015000:For the temporary boilers, what are the required loads for Storrs Hall and the Wilbur Cross Building?

The Infirmary and Wilbur Cross Hall presently have electrical hot water heaters and do not require temporary boilers during the construction project, (assuming steam is reactivated prior the onset of heating season on October 15th).

10 SS-301: Please provide structural details for Vault D5.Vault D5 is a precast vault. See specification section 034100 - Precast Structural Concrete.

11Specification Section 336300: Would you entertain "or equals" for the triple offset butterfly valves and ball joints?

No "or equals" for triple offset butterfly valves and ball joints will be entertained for this project.

12

Appendix C:Will UCONN have a permit to backfill with soil classified as polluted? If not, all excavated soil will have to be removed and replaced. Does UCONN have a site to dispose of polluted or contaminated

Since the soil tested meets RSR criteria and it will be placed back in the same location a permit is not required. The Contractor is responsible for disposing of contaminated soil. The University does not have a site.

13 MD 101: What are the depths of the existing steam and condensate conduits?

See Bid Clarification #13 for profiles and existing drawings relating to the existing pipe to be removed.

14

If we choose to abandon and encapsulate in place the existing asbestos insulated 8" steam and 4" condensate lines from the CUP to Vault A5A, will it considered an alternate as it is shown in Spec 012300?

The steam and condensate lines from the CUP to Vault A5A cannot be abandoned and encapsulated. It must be removed. The base bid is to include removal of this section of pipe.

15

Please specify the class and configuration (MJ, Flanged, Push joint, etc) of the 6" cement lined DI Drain pipe shown on the drawings.

See Bid Clarification #10 & #15 for class and configuration fo the 6" cement lined ductile iron drainage pipe.

16 Does the Contractor apply the sprayed insulation to vertical pipe risers?

Exposed pipes in A5 & D5 shall receive spray applied insulation, including the vertical steam and condensate headers in these vaults.

17 Does the proposed ductile iron pipe require insulation? Insulation is not required on ductile iron pipe.

18Plan Sheet MP101 specifies that Vault D-5 be removed and replaced. Please provide structural plans and details for this vault.

Vault D5 is a precast vault. See specification section 034100 - Precast Structural Concrete.

19

Please confirm that all steam pipe 8" and smaller is schedule 80 pipe and all steam pipe 10" and larger is proposed as extra heavy pipe.

Yes, this is correct.

20

Please refer to plan sheet FP-502, Vault A5 detail. The plan specifies dielectric flanges. Please supply a specification for the dielectric flanges.

See Bid Clarification #9 for a specification for the dielectric flanges.

21

Does the contractor include in his price to remove all excavated material to a specified stockpile area for "contaminated fill" testing

F & O'N ill' d ti ?

Yes, the Contractor is to include in his price to remove all excavated material to a specified stockpile area for "contaminated fill" testing.per Fuss & O'Neill's recommendations? stoc p e a ea o co ta ated test g

22

Is the University responsible for obtaining and paying fees for independent testing consultant/firm for testing fill for contamination?

The Contractor is responsible for paying fees for independent testing for the contamination

23

Has the University apply the recommended fertilizer t the existing Slippery Elm per the arborist recommendations (after ground has thawed)?

The University has not applied the recommend fertilizer. The Contractor will be responsible for applying the fertilizer.

24

Per project specification, the contractor is required to assign four key personnel to this project. Can the Contractor assign more than one position to one person? (i.e. one person is assigned as the superintendent

The project superintendent shall be full time and shall be on site during any and all construction activities. Other positions may be part time. During construction activities within 25 feet of the high pressure gas line or the Ammonia tank the contractor shall provide a full time on site

25

Plan sheet CP-101 specifies different details on site access plans. Area #2, third line down specifies that the road can only be closed during the hours of 5 p.m. and 7 a.m. Monday thru Friday. However the plan view

The plan is proivded to show how the road can be closed under a temporary condition. The Contractor is responsible for removing the road closure by 7 am each day. The Contrator may alter this concept as long as it meets the requriements set forth by the University

26

Please confirm that the Contractor has no proposed work in Vaults M10, G12, F12, D12. Refer to plan sheet MP-507 steam trap detail, this schedule listed the above vaults.

Yes, the Contractor has no proposed work in vaults M10, G12, F12, & D12.

27

Please confirm that the University is obtaining and paying for an independent testing firm for the required radiograph pipe weld testing.

The Contractor is responsible for obtaining and paying for an independent testing firm for the required radiograph pipe weld testing.

28Please confirm that cathodic protection is required for the proposed underground pipe system on this project.

Cathodic protection is not required for the steam and condensate piping for this project. Anode bags are required on direct burried ductile iron pipe between D5 and A5 vaults per MP-501.

29 Who is responsible for providing an paying for the fuel for the temporary boilers?

The university provides electrical power at no cost to the contractor if in accordance with requirements of project manual section: 01 50 00 - 3.2

30Can the loads be provided for the two buildings that require the temporary boilers?

The Infirmary and Wilbur Cross Hall presently have electrical hot water heaters and do not require temporary boilers during the construction project, (assuming steam is reactivated prior the onset of heating season on October 15th).

31

Div.1, Sec 4.1 & Div. 2 Sec..02-82-33: Is the asbestos coated pipe between the CUP & Vault A5A to be removed or abandoned & encapsulated in place?

The steam and condensate lines from the CUP to Vault A5A cannot be abandoned and encapsulated. It must be removed. The base bid is to include removal of this section of pipe.

G:\P2008\0872\C10\20100412_bid_clarifiation-alternates.doc

April 14, 2010

Steam Distribution Systems Modification, Expansion and RepairUniversity of Connecticut, Storrs Campus

Project Number: 901421

Bid Clarification:

Specifications:

1. The contractor shall submit, with their bid, a narrative describing their methodology forprotecting the ‘Slippery Elm’ tree, (hereafter referred to as the tree) indicated on drawing MP101 to the northwest of Storrs Hall. The contractor shall submit, with their bid, the nameand credentials of the licensed arborist they propose to subcontract with to certify andsupervise the tree protection and related tree maintenance procedures. The contractor shallprovide shoring on both sides of the trench within the drip line of the tree to minimize thetrench width. The contractor shall hand excavate below all roots crossing the trench andtemporarily support and protect exposed roots until the trench is backfilled and the site isrestored. The contractor shall install temporary fencing around the perimeter of the treebeyond the drip line – anchored in the ground. The contractor shall install temporaryfencing on either side of the trench within the drip line of the tree on platforms orstanchions, not anchored in the ground; this fenced area shall not be wider than five feet.The contractor shall refer to project manual section 01 56 39 and appendix B for additionalrequirements. If there are any discrepancies in the contract documents or between thecontract documents and this bid clarification the contractor shall adhere to the morestringent requirements for tree protection. The contractor shall submit a breakout price intheir bid for the arborist’s fees and for all tree protection measures including additionaltrench excavation and shoring costs.

2. Specification 01 11 00 Summary of Work –a. 1.3 A – Remove the 2nd paragraph in bold.b. 1.3 A - Remove Alternate #1. The isolation valves are being installed by the

University.c. 1.6 C – the work day shall be 7 am to 5:30 pm, except road closure work which must

be done between 5 pm and 7 am.d. 1.7 B – Delete section. Block and bleed valves shall be installed on steam and

condensate piping in basement of the Central Utilities during normal constructionhours and not during the shut down.

e. 1.7 C -1. Wilbur Cross Building will not require a temporary boiler for hot water. 2.Storrs Hall will require an electric hot water heater.

f. 1.7 D - Replace the word “Abate” with “Remove” in the first sentence.g. Revise 1.4 A.1 – steam must be activated by October 15th, site restoration must be

complete by November 19th.

3. Specification 01 23 00 Alternates - Remove Alternate #1. The isolation valves are beinginstalled by the University.

G:\P2008\0872\C10\20100412_bid_clarifiation-alternates.doc

4. Specification 01 31 13 – 5.1 Delete A.

5. Specification 01 56 39 Temporary Tree and Plant Protection –a. Replace “Engineer” with “Certified Arborist”b. Part 3 – Execution 3.2 C – Remove #1.

6. Specification 33 63 00 Steam Distribution, Part 2 – Manufactures #1 –a. Add b. Tricon Piping Systems, Inc. and c. Insul-Tek.

7. Table of Contents – The Arborist Report is Appendix B and the Boring Report is AppendixA.

8. The Boring Report, Appendix A, is being replaced in its entirety.

9. Specification 33 63 00 – Add 2.18 (see attached)

10. Specification 33 41 00 – Add 3.12 (see attached)

Drawings:

11. MP-507a. Attached is SK-MP507.1. This sketch provides the dimensions of the dedicated

steam tunnel ventilation intake manhole.b. MP-507 – Attached is SK-MP507.2. This sketch provides the dimensions of the

dedicated steam tunnel ventilation relief manhole.

12. Attached are Details SK-3, SK-4, & SK-5 which provide the dimensions of the vaults thatare to be demolished.

13. Attached are Details SK-6A and SK-6B which provide the depth of the existing pipe to beremoved.

14. MP-101 – Revise the reference to Appendix A for the Arborist Report to Appendix B.

15. MP-403 – See attached detail MP-403.8 for the configuration of cement lined ductile ironpipe.

Steam Distribution System Modifications,Expansion and RepairStorrs, CTProject #901421 STEAM DISTRIBUTION 33 63 00

2. 18 Dielectric Isolation Flange Kits

The materials for flange isolation kits on pipes containing steam or condensate to 353 degreesF, (~125 psig saturated steam). shall consist of the following components:

Isolating and Sealing GasketOne full faced isolating and sealing gasket, LineBacker® Sealing Gasket Type “F”, 1/8” thick, G-3 High-Temp Phenolic glass retainer containing a precision tapered groove to accommodate thecontrolled compression of a Teflon quad-ring sealing element. Sealing element placement shallaccommodate either flat, raised or RTJ face flanges. The quad-ring seal shall be pressureenergized. The G-3 High Temp phenolic retainer shall have a 550 volts/mil dielectric strengthand a minimum 50,000 psi compressive strength. The full faced flange isolating gasket shall be1/8” less in I.D. than the I.D. of the flange in which it is installed.

Full Length Bolt Isolating SleevesOne full length Nomex sleeve (extending half way into both steel washers) for each flange bolt.The Nomex shall be a 1/32 inch thick tube with a 400 volts/mil dielectric.

WashersTwo, 1/8 inch thick, G-3 High Temp Phenolic glass isolating washers for each bolt. Theircompressive strength shall be 50,000 psi, dielectric strength 400 volts/mil. Two, 1/8 inch thicksteel washers for each bolt. The I.D. of all washers shall fit over the isolating sleeve and thesteel and isolating washers shall have the same I.D. and O.D.

QualityFlange Isolation Kits shall be manufactured at a facility that has a registered ISO 9001:2000Quality Management System. Submittals shall include a copy of current, valid registration.

InstallationFollow manufacturer’s installation instructions. Fill annular gap between flange faces withdielectric caulk to prevent foreign materials from accumulating in the gap and potentially causingan unwanted electrical connection between the flanges.

Manufacturer & Availability

Kits shall be manufactured by Pipeline Seal and Insulator, Inc., Houston, Texas, U.S.A.,Telephone: 713-747-6948, Fax 713-747-6029, www.pipelineseal.com, email: [email protected]

Available from: Stuart Steel Protection Corporation, PO Box 476, So. Bound Brook, NJ 08880,Phone 732-469-5544, Fax 732-469-9270, www.stuartsteel.com, email [email protected]

http://www.pipelineseal.com/mailto:[email protected]://www.stuartsteel.com/mailto:[email protected]

Steam Distribution System Modifications,Expansion and RepairStorrs, CTProject #901421 STORM DRAINAGE 33 41 00

3.12 Ductile Iron Pipe

Ductile Iron Pipe for steam vault drains shall be Cement Lined (no seal coat), Class 52Ductile Iron Pipe with EPDM (Ethylene Propylene Diene Monomer) gaskets. Joints shall becapable of 5 degrees deflection from center (10 degrees total), and ½” of pullout. Pipe shallbe U.S. Pipe TR Flex or equal approved by owner and engineer.

When the installation of the piping system is complete (and before the steam system isenergized) the joints shall be left in the extended position. (The joints can be extended eithermechanically or by pressurization the piping system as done during a leak test.)

Use short lengths of TR Flex by Flange fittings to make for rigid elbows or joints in locationswhere required by design or installation.

In the tunnel, there shall be at least one support per length of pipe.

Modify the supports for ductile iron pipe as follows:

DI drain pipe in fuel oil gallery to be supported on rollers at a minimum of once per length orat manufacturer’s recommended support spacing. Supports shall be located immediatelyafter “bell” to maximize joint support.

At location approximately 1’-8” west of station 60+88.15 (at elbow) on MP-401:Add spring hanger sized per weight.

At location approximately 6 feet west of station 60+88.15 on MP-401:Add guide support on DI drain pipe (to existing support structure).

At station 61+22.15 on MP-403:Replace roller support with guide support on DI drain pipe.

In dedicated steam tunnel vertical riser:Add (2) spring hangers and modify piping as shown on sketch SK-MP403.8

At support approximately 6 feet west of station 61+41.28 on MP-403:Replace roller support with guide support on DI drain pipe.

At station 61+96.28 on MP-501:Replace roller support with anchor support on DI drain pipe.

In replacement vault A5A on MP-501:Change roller supports on DI drain pipe to slide supports at similar slide supportlocations as on steam & condensate pipe.



End

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UNIVERSITY OF CONNECTICUTMECHANICAL PIPING DETAILS

STEAM DISTRIBUTION SYSTEMMODIFICATION, EXPANSION AND REPAIR -

PRV LINE #6 (INFIRMARY)PROJECT #901421STORRS CONNECTICUT

20080872 A30APRIL 12, 20101/2" = 1'-0"

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UNIVERSITY OF CONNECTICUTMECHANICAL PIPING DETAILS



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UNIVERSITY OF CONNECTICUTEXISTING VAULT A5A DIMENSIONS



20080872 A30APRIL 12, 2010

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UNIVERSITY OF CONNECTICUTEXISTING VAULT A5 DIMENSIONS



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UNIVERSITY OF CONNECTICUTEXISTING VAULT D5 DIMENSIONS



20080872 A30APRIL 12, 2010

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UNIVERSITY OF CONNECTICUTEXISTING STEAM & CONDENSATE ELEVATIONS



20080872 A30APRIL 12, 2010

SK-6A

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UNIVERSITY OF CONNECTICUTEXISTING STEAM & CONDENSATE ELEVATIONS



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UNIVERSITY OF CONNECTICUT

TUNNEL RISER PAN & ELEVATIONSTEAM DISTRIBUTION SYSTEM

MODIFICATION, EXPANSION AND REPAIR -PRV LINE #6 (INFIRMARY)

PROJECT #901421STORRS CONNECTICUT

20080872.A30APRIL 12, 20101/8" = 1'-0"

RFI Response Log Steam and Condensate.pdfSheet1

20100414_Specs.pdf20100414_DielectricIsolationFlange_spec_33630020100414_DI_pipe_ spec-RFI

20100414_Sketches.pdf20080872A30_DET08_PIPE_INFIRM20080872A30_SKETCHES_3-6B20080872A30_DET03_STMTUNNEL_INFIRM

bid clarification #1 bc3_steam_an… · please confirm that cathodic protection is required for the...

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