140R8121R0008_0004_0004.pdf

(x)

140R8121R0008 x x

1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted ; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT TO BE

RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR

OFFER. If by virtue of this amendment you desire to change an offer already submitted , such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

x

Denver CO 80225

MS 84-27810

R81

Building 67 - Denver Federal Center Acquisition Operations Branch Denver Office Bureau of Reclamation

08/30/20210004

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

12. ACCOUNTING AND APPROPRIATION DATA (If required) is not extended.is extended, Items 8 and 15, and returning

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended , by one of the following methods: (a) By completing

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

FACILITY CODE CODE

10B. DATED (SEE ITEM 13)

10A. MODIFICATION OF CONTRACT/ORDER NO.

9B. DATED (SEE ITEM 11)

9A. AMENDMENT OF SOLICITATION NO.

CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

7. ADMINISTERED BY (If other than Item 6)CODE 6. ISSUED BY

PAGE OF PAGES

4. REQUISITION/PURCHASE REQ. NO.3. EFFECTIVE DATE2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO. (If applicable)

1. CONTRACT ID CODE

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

07/27/2021

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority) appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

E. IMPORTANT: Contractor is not is required to sign this document and return __________________ copies to the issuing office.

ORDER NO. IN ITEM 10A.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

A. Project Title: Environmental Chambers Retrofit, Denver, Colorado

Period of Performance: 09/20/2021 to 03/20/2023

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)15A. NAME AND TITLE OF SIGNER (Type or print)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 15B. CONTRACTOR/OFFEROR 16C. DATE SIGNED

(Signature of person authorized to sign) (Signature of Contracting Officer)

Amanda Somerville

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

Previous edition unusable

Except as provided herein, all terms and conditions of the document referenced in Item 9 A or 10A, as heretofore changed, remains unchanged and in full force and effect .

Solicitation No. 140R8121R0008 Amendment 0004

A. Project Title: Environmental Chambers Retrofit, Denver, Colorado

B. Receipt of Offers: The hour and date for receipt of proposals is 3:00pm (MDT) on September 2, 2021. Times listed in SAM.gov may differ listed in the Contract Opportunities;

however the hour and date for receipt of proposals is 3:00pm (MDT) on September 2, 2021.

C. Description of Changes: The following changes are made to the solicitation:

1) The language in Section C, Statement of Work, paragraph 2.44.1.13 is hereby deleted in its entirety.

2) The language for Section C, Statement of Work, paragraph 2.44.1.13 is hereby replaced with: “Provide manufacturer’s published failure frequencies for the equipment selected.”

3) Section C, Statement of Work, paragraph 2, Scope is hereby incorporated:

a. 2.50 Range of Coefficients Heat transfer coefficients typically encountered for concrete tested in USBR Environmental Chambers

Concrete Property Range of Typical Values (per A.M. Neville Properties of Concrete 4th Edition, 1995)

Thermal Conductivity, K 1.4 to 3.6 J/m2s ℃/m (0.8 to 2.1 Btu/ft2 ºF/ft) Thermal Diffusivity, δ 0.002 to .006 m2/h (0.02 to 0.06 ft2/h) Specific Heat, c 840 to 1170 J/kg per ℃ (0.20 o 0.28 Btu/lb per ºF) Density, ρ 2200 to 2600 kg/m3 (140 to 160 lb/ft3)

4) Attachment J.3 – Bid Bond has been incorporated into the solicitation for completion by offerors.

5) A listing of questions and answers is also provided for information purposes only.

Environmental Chambers Retrofit Pre-bid Questions and Answers

Question 1: 2.0 SCOPE, p. 16, C-1. “Given the age of the equipment and maintenance/repairs, the heating, refrigeration, monitoring, and control technology require renovation to re-establish a reliable, current state of the practice for the environmentally controlled chambers to fulfill current testing program needs and to be adaptable for future unforeseen testing needs.”

- How soon will unforeseen testing needs be implemented and expected of our design?

- What would be tested?

- Can this statement specifying future unforeseen testing needs be removed from the Statement of Work?

Response 1: For current and future testing please refer to paragraphs 2.4, 2.22, 2.23, and 2.29 in the statement of work.

Question 2: 2.0 SCOPE, p. 16, C-1 “This current system needs to be renovated because they have failed to perform reliably from time of original installation. The new retrofitted configuration should not rely on the previous designs or components of the heating and cooling, control system, or data acquisitions from the existing configuration.

- Does this statement take precedence over all design suggestions stated in statement of work that are based on previous equipment designs?

Response 2: Paragraph 10.0 Background Information and Attachments in the Statement of Work is for the existing system and provided for information only and are not design suggestions.

Question 3: 2.0 S.O.W, p. 17, C-2 “It is desired that the retrofitted configuration will retain at least five of the six existing insulated chambers (walk-ins) in their existing locations and encompass the same general boundary conditions. Chamber(s) not retrofitted may remain in place; or may be removed by the contractor if more space for the new configuration is needed.”

- Does the BoR have a request for which chamber should be removed or re-purposed?

Response 3: Refer to Statement of Work, paragraph 2.0 Scope, sub-paragraph 6, fourth sentence “Elimination of one or more of the existing chambers is acceptable as long as operational testing flexibility is maintained within the other chambers.”

Question 4: 2.0 S.O.W, p. 17, C-2 “Elimination of one or more of the existing chambers is acceptable as long as operational testing flexibility is maintained within the other chambers” Would you please define testing flexibility?

Response 4: Refer to Statement of Work paragraph 2.5 “The ability to concurrently use a minimum of three chambers for Temperature Rise of Concrete testing is required. All chambers shall be capable of performing this test in the event one chamber is being serviced.”

Question 5: 2.0 S.O.W, p. 17, C-2 “All equipment required for operation of each chamber shall be supplied by the contractor. Each chamber shall be a standalone unit without need of sharing any other equipment, with the exception of the chilled water system provided by a chiller on the exterior of the building. Reclamation may approve the use of shared equipment between multiple chambers if it is a more efficient solution AND, if suitable redundancy is established to maintain reliability of each chamber.”

- What is the required “suitable redundancy” for each chamber? Should each chamber have fully redundant systems for both the freeze/thaw and heat rise processes? (Each test will require separate equipment to function properly)

Response 5: Suitable redundancy is not defined in the Statement of Work. A decision to approve the use of shared equipment would be value based on the two requirements in paragraph 2.0 Scope of Work:

1) If it is a more efficient solution, and

2) If suitable redundancy is established to maintain reliability.

Question 6: 2.4 S.O.W., p. 18, C-3 “Maximum Control Tolerance Time Weighted Average stated as less than 1°F and 2°F for the heat rise and freeze/thaw tests, respectively”

- How precise will the data logging software be monitoring temperatures during these tests? To a tenth of a degree? To a one hundredth of a degree?

Response 6: Refer to Section C, Procedure for Temperature Rise of Concrete (USBR 4911-92), Table 1a and 1b. Temperature recording shall be to 0.1oF.

Question 7: 2.5 S.O.W., p. 18, C-3 “The ability to concurrently use a minimum of three chambers for Temperature Rise of Concrete testing is required. All chambers shall be capable of performing this test in the event one chamber is being serviced.”

- Do all chambers have to perform the freeze/thaw test? This increases equipment cost.

Response 7: Refer to Statement of Work, paragraph 2.4 table where all chambers are required to meet the required temperature ranges and temperature control accuracy which includes freezing and thawing.

Question 8: 2.10 S.O.W., p. 19, C-4 “All the current system’s refrigeration equipment is on top of the chambers in a 45-inch high space and difficult to access and perform maintenance. Ease of access and simplicity of maintenance is a top priority of this project.”

- Can the fans and heat exchanger coil be installed on top of the box?

Response 8: Yes, provided the requirements of Statement of Work paragraph 2.10 are met for ease of access to the equipment.

Question 9: 2.11 S.O.W., p. 19, C-4 “All refrigeration equipment shall be clearly marked on the drawings”

- Is EML expected to provide drawings, or is the BofR going to provide them?

Response 9: Refer to the Statement of Work, Deliverables, Paragraph 7.1 Retrofit Configuration Plan which requires the contractor to provide detailed drawings.

Question 10: 2.12 S.O.W., p. 19, C-4 “All existing conditioning equipment and assemblies shall be removed and replaced, (or with exceptions for reuse as approved by Reclamation).”

- Can the fans and coil housings be re-used?

Response 10: Refer to Statement of Work, Paragraph 2.45, requiring all equipment be new.

Question 11: 2.15.2 S.O.W., p. 20, C-5 “New circuit breakers shall be provided as part of the retrofitting for all major pieces of equipment.”

- Do new electrical panels need to be installed or can the existing panels be used?

- Can new circuit breakers be available in the housing of the HVAC equipment?

Response 11: Refer to Statement of Work, paragraph 2.15 all control panel and circuit breakers for individual chambers and paragraph 2.38 which requires General Services Administration (GSA) to make changes to building electrical panels. Work must confirm to all applicable electrical code requirements.

Question 12: 2.17 S.O.W., p. 20, C-5 “If standalone controls cabinets are used in the retrofitted configuration, the location must be presented in the proposal and final location approved by Reclamation.

Location must not impede regular laboratory traffic or limit cart or pallet jack access to all chambers.”

- Can all the control systems be set-up in a single location to clear up space in the Ante Room?

- Are multiple monitors necessary if all the control systems can be accessed by a single or multiple monitor(s)?

Response 12: Yes, the control systems may be set up in a single location. Refer to Statement of Work, paragraph 2, Scope of Work. Monitors may be shared between multiple chambers if the following requirements are met:

1) A proposal is approved by Reclamation

2) It is a more efficient solution

3) Suitable redundancy is established to maintain reliability of each chamber

Question 13: 2.18 S.O.W., p. 20, C-5 “The retrofitted chambers shall encompass a temperature range of - 20 to 180°F with a minimum temperature rate of change of 30°F/hour in both increasing and decreasing temperature directions.”

- This will greatly increase the cost of heating and cooling equipment if they must all be able to cool down to -20 degrees. If all of them are capable of the heat rise test, can we limit which of them can perform the freeze/thaw test?

Response 13: Please refer to the Table in Paragraph 2.4 of the Statement of Work where all chambers are required to meet the required temperature ranges and temperature control accuracy which includes freezing and thawing.

Question 14: 2.21 S.O.W., p. 20, C-5 “All existing computers along with its control hardware should be removed and replaced by the contractor”

- Is there any sensitive software or data that needs to be removed from the existing computers prior to installing the new computer systems?

Response 14: No.

Question 15: 2.22 S.O.W., p. 21, C-6 “The system shall be controlled using customizable software written in LabVIEW (or similar, easy to learn and configurable software that is designed for laboratory use) which controls each chamber temperature separately and acquires data from the chambers and test specimens to make the temperature adjustments.”

- What outputs does LabVIEW use to control the heating and refrigeration systems?

Response 15: The Statement of Work does not require LabVIEW. Refer to paragraphs 2.20 and 2.37 for output requirements.

Question 16: 2.38 S.O.W., p. 21, C-8 “Design and installation shall adhere to the International Building Code, International Mechanical Code, International Plumbing Code and NFPA 70. Equipment shall be energy star rated if available, otherwise shall adhere to ASHRAE 90.1”

- Should we plan on hiring an engineering firm so the design and drawings adhere to these standards?

- Should the design for this proposal be completed prior to bid or awarding of contract?

Response 16: Refer to Section L, Instructions, Conditions, and Notices to Offeror, paragraph L.8 General Proposal Instructions, (f) Volume II, for proposal requirements. Also refer to Paragraph 7.1 and the Deliverables Table in the Statement of Work. A complete Retrofit Configuration Plan is required 120 days after award of the contract.

Question 17: 2.41.32.2 S.O.W., p. 24, C-9 “A nominal freezing-and-thawing cycle shall consist of alternately lowering the temperature of the specimens from 40 to 0 °F and raising it from 0 to 40 °F in not less than 2- nor more than 5 hours”

- Will the chamber be expected to maintain 40 degrees to cool the specimens to 40 degrees prior to beginning the freeze/thaw test?

- How long must each chamber be able to maintain 40 degrees prior to beginning the freeze/thaw test?

- Should a complete freeze and thaw cycle occur in two to five hours or is that time duration expected for each freeze then thaw process segment (freeze/thaw cycle then occurs over four to ten hours)?

Response 17: Refer to ASTM C666. ASTM C666 requires the specimen to be at the required temperature before the test begins. A cycle includes a freezing and a thawing for one complete cycle.

Question 18: 2.44.1.13 S.O.W., p. 25, C-10 “Due to the critical nature of the testing performed by Reclamation in these chambers, the contractor shall submit information on expected failure frequencies for the equipment selected and applicable mitigation measures.”

- What should we provide for expected failure frequencies if this information is not available from equipment manufacturers?

Response 18: An amendment to the solicitation will be issued to addressing this question.

Question 19: 2.44.1.14 S.O.W., p. 25, C-10 “Optional additional recommendations for system redundancy, including costs for each, may be submitted to the Government for evaluation and approval.”

- What should we provide for expected failure frequencies if this information is not available from equipment manufacturers?

Response 19: An amendment to the solicitation will be issued to addressing this question.

Question 20: 4.0 PLACE AND PERIOD OF PERFORMANCE, p. 26, C-11 “The anticipated period of performance is 18 months after notice to proceed”

- What should we do if current equipment lead time are four to five months? Will the period of performance be adjusted?

- Cooling Water System Replacement Documentation Requirements

- Can these calculations be trusted?

Response 20: Refer to Supplies and Services on page 3 of Standard From 1442 and Statement of Work, Deliverables Table, Paragraph 7.4, requiring all modifications and/or additions be complete 18 months after the date of the Notice to Proceed (NTP).

Statement of Work, paragraph 10, Background Information and Attachments are existing system and provided for information only and are not design suggestions.

Question 21: Is the floor of each chamber insulated from ground temperatures and moisture?

Response 21: Yes.

Question 22: Please confirm that proposals are to be submitted electronically.

Response 22: Proposals are to be submitted electronically to the Contracting Officer, Amanda Somerville, at asomerville@usbr.gov. No faxed or mailed proposals will be accepted.

Question 23: Please confirm that the proposals are due on September 1, 2021 and the time. The SAM.gov page has it due on September 2nd.

Response 23: Proposals are due 3:00pm (MDT) on September 2, 2021.

Question 24: The amendment show that the proposals are due at 1700 ED. Is this 1700 Eastern Standard Time.

Response 24: Proposals are due 3:00pm (MDT) on September 2, 2021.

D. Third Party: If you have given a copy of this solicitation to someone else, please forward this amendment accordingly.

mailto:asomerville@usbr.gov