Amend 2 Attach 1 DRTO_241934_Q and A part 1 02.25.2020_0002.pdf

Solicitation No. 140P2020R0004 – Amendment No. 2

DRTO 241934 – Preserve Tortugas Harbor Lighthouse

Bid Clarifications (01 thru 02)

1. The new bid due date is Monday, March 16, 2020 at Noon, MT.

2. The Government has a desire to complete the disassembly work by June 1, 2020. However, the

Government realizes that timeline may not be practical based on the amount of preparatory and on-site work necessary for disassembly. Within their proposal, contractors shall provide a detailed narrative and discussion of their anticipated project schedule. This schedule shall be based on their opinion and expertise and reflect a reasonable depiction of the project timeline based on the required work that must be completed on-site and in their proposed treatment facility. In the event the contractor will require disassembly work after June 1st, the contractor shall reflect and describe this timeline within their proposal. Any work completed after June 1st will required an updating of the project Accident Prevent Plan to include necessary hurricane preparation and evacuation procedures in accordance with the existing DRTO Hurricane Plan.

Bid Questions & Answers (01 thru 21)

1. The Solicitation Section H notes that both a Job-site Superintendent and Quality Control Manager are to be submitted for this project. Neither the specifications nor the solicitation list the onsite requirements for these positions. Can the same individual, if appropriately qualified by past experience, perform both the Superintendent and Quality Control Manager roles onsite?

No. The Superintendent may not hold the position of Architectural Conservator or Quality Control

Supervisor. The Superintendent is responsible for day-to-day operation of the site. The

Superintendent may hold the positions of Safety Supervisor, Waste Management Coordinator and

Pollution Prevention Manager. The Quality Control Supervisor may hold the position of

Architectural Conservator, if qualified and desired but no other positions. The Quality Control

Supervisor is responsible for all quality control on the project, including but not limited to all tasks associated with Specification Section 01 40 00.

2. Per the site visit is there on site housing for up to ten workers of the same gender?

Crew’s Quarters is the designated housing for the contract and the park considers the unit co-ed. 4 bunks can be closed off with the partition door, but there are not separate bathrooms. It’s up to the contractor to manage gender divisions.

3. Will the temporary fencing become the property of the GC along with maintenance of the sand bags, etc?

Yes. However, granite blocks found on the ground are NOT the property of contractor and must remain on-site.

4. Per the site visit can you confirm that no phone service will be provided and that GC must provide a satellite phone for emergencies, etc.?

Confirmed. No phone service will be provided. See Specification Section 01 11 00, 1.5.A.8 for contractor requirements.

5. Is there limited WiFi available in the housing area?

Limited WIFI is available in Crews quarters for transient users. The system is capable of supporting minimal texting, email, and web browsing. See Specification Section 01 11 00, 1.5.A.8 for contractor requirements.

6. What are the daily limits for potable water use?

Potable water will be provided to each occupant on Crew’s Quarters for personal use, e.g. cooking cleaning, drinking and bathing/showering. Potable water will not be provided for construction. The park manages potable water usage not to exceed 50 gallons per person per day.

7. What are the emergency evacuation procedures (e.g., coast guard helicopter)?

Contractor is required to have their own Accident Prevention Plan (APP) in place per Specification 01 35 23. The contractor shall coordinate their own APP with the established DRTO Emergency Action Plan and DRTO Hurricane Plan, attached.

8. Are discounted ferry rates available for construction workers?

No. The contractor may not negotiate any rates with the ferry concessioner. The established “NPS

Contractor/Cooperator One-Way” rate for contractors is $99 each way per person and passage must be booked using the link provided. The use of the administrative booking website is limited to official use only and may not be used for recreational visits, guests staying in campground or on boats in the harbor. Use of the administrative booking website allows contractor to book up to 4 hours in advance and is not subject to the public use limitation of 175 tourist passengers. Further, use of the administrative booking website is not subject to entrance fee collection.

9. If a hurricane watch/warning occurs during onsite work, will NPS pay for emergency shoring to support the partially deconstructed structure?

No. The contractor is responsible for all costs

10. What is the process for evacuating the Dry Tortugas, if a hurricane watch is issued while workers are onsite?

Contractor is required to have their own Accident Prevention Plan (APP) in place per Specification 01

35 23. The contractor shall coordinate their own APP with the established DRTO Emergency Action

Plan and DRTO Hurricane Plan, attached.

11. Per discussion at the site visit are the notes regarding storage to be provided by the NPS in Everglades missile site to be deleted?

Yes. The contractor will not be utilizing the Nike Missile Site. Contractor shall identify anticipated treatment location as part of their proposal.

12. What are the work limits within the fort? Could the construction fencing be pushed away from the base of the tower by another 15 feet for example?

All contract work area modifications should be submitted as RFIs after award. For example, yes, this action would be possible.

13. Can the structural calculations and inspection reports for the existing shoring be provided?

Structural Calculations will be provided. Inspection reports were issued in Amendment No. 1 on

February 20, 2020.

14. Can the product data and erection drawings be provided on the existing scaffold?

Erection drawings will be provided. Product data is not available.

15. Would NPS consider changing the Metalizing requirement to a Coating such as an organic zinc epoxy or zinc-rich aromatic urethane?

Contractors shall bid the specified coatings.

16. Will power while on Island for the Time lapse videography be provided by NPS?

NO. Contractor is responsible for all work-related power generation. It is anticipated that time lapse photography equipment would be battery powered.

17. The required WJ-2/SC-3 surface preparation followed by abrasive blasting appears to be redundant.

The specified abrasive blasting requirements of SP-10 and SP-6 will render the same level of cleanliness or better than the WJ-2. Since the metal must be abrasive blasted to create a profile for coating adhesion would Low pressure water cleaning WJ-4/SC-3 followed by abrasive blasting as specified be acceptable for surface preparation?

Contractor shall bid the specified treatment.

18. Would the NPS consider changing the following Units of measures for the below pay items, or clarify how Welding and Filling will be quantified utilizing the Square Foot unit of measure?

a. 2.B – Change Unit of Measure to Cubic Inches

b. 2.C – Change Unit of Measure to Linear Feet

c. 2.H – Change Unit of Measure to Cubic Inches

d. 2.I – Change Unit of Measure to Linear Feet

Existing quantity breakdown shall follow bid schedule. Quantities will be determined based on depth of welding and filling and associated area of repairs.

19. Could you please clarify the location of the following metal components per the below bid items?

a. 2.P – Other than the Lantern Room Wall, what wrought iron rolled plate(s) does this refer to?

b. 2.Q

c. 2.R

d. 2.S

e. 2.T

The construction drawings provide this information adequately in both the G series and ST series sheets.

20. The solicitation special clause 2 under section H, states that we are to list an architectural conservator. The specifications do not provide any requirements or scope specific architectural conservator standards. Is the conservator to just develop or review the conservation plan and do quality control visits? What is the role of the required architectural conservator for this project?

Please see that attached description for architectural conservator. The architectural conservator may also be the quality control supervisor, if qualified and desired. The architectural supervisor may have no other duties. The architectural conservator is responsible for developing, implementing and managing the Historic Preservation Treatment Plan in accordance with Specification Section 01 35

91. The architectural conservator is responsible for ensuring all treatment is in accordance with the contract documents.

21. I strongly recommend considering laser cleaning instead of a water jet cleaning. Water jet cleaning is a mechanical method and will cause damage to the metal, additionally water methods will promote the corrosion of the metal. Laser cleaning is non-contact and does not drive water into the micro structure of the object.

Contractor shall bid the specified treatment.

Additional Bid Clarifications, Questions and Answers will be provided in the next Amendment, No. 3.

ARCHITECTURAL CONSERVATOR

The interdisciplinary professional provides expertise accumulated through education and experience in the preservation, conservation, and maintenance of historic structures and ruins. The architectural conservator is a "preservation technologist who attempts to combine the perspective of an architectural historian with the overall approach of an architect and the scientific focus of the conservator (National

Conservation Advisory Council, Report of the Study Committee on Architectural Conservation, Washington, DC, 1977, p 7). The work of the architectural conservator is focused on the project, site, or given area where a conservation program is being considered, in progress, or being assessed. The conservator is a member of a team that focuses on the preservation of historic structures and conservation of fabric from which these structures are made.

Knowledge, Skills, and Abilities

Professional knowledge, skill, and ability in understanding and applying the philosophy of preservation and with one or more conservation skills equivalent to or gained with professional certificates or degrees from recognized preservation and/or conservation programs at universities and colleges

Ability to apply the philosophy and fundamental principles of historic preservation and architectural conservation to project work, particularly with regard to conservation treatment technologies, and crafts skills, working interdisciplinarity with other preservation professionals and craftspeople, in order to treat a site or structure holistically

Knowledge of contemporary conservation treatments (methods and materials), when their application is required, and the technologies relating to their applications, such as cleaning, coatings (i.e., repellents), consolidation, adhesion or re-adhesion, biocides, and temporary reversible stabilizations

Ability to direct conservation treatments on materials using one or more of the following:

application of adhesives, coatings, consolidants and biocides; removal of the deteriorated material, deterioration mechanisms, and non-functioning or destructive earlier treatments; and replacement of missing materials when warranted.

Ability to treat materials associated with a site, historic structure, and/or architectural element in situ for the sole purpose of conserving the element in its existing form so it may retain its highest integrity and thus authentic interpretability.

Knowledge of ability to apply permanent and temporary conservation treatments prior to the necessary moving or relocation of material that is destined for a temporary location such as a laboratory.

Strong knowledge of and ability to apply all materials and chemical safety standards (e.g., OSHA) during conservation practices.

Roles and Responsibility

Serves as subject-matter professional and provides technical information and knowledge about architectural conservation and supervises planning and implementation of architectural conservation tasks

Records sites and field conditions in written or tabular formats

Manage or consult on complex field conservation projects reflecting coordination with multi-disciplinary groups and the ability to utilize input from these diverse influences.

Will identify and conduct conservation procedures in situ or in the laboratory (as the project dictates), on one or more materials such as:

o structural components (e.g., wood, metal, masonry) o construction materials (e.g., wood, stone, brick, metal, concrete, mortar, earthen materials) o surface treatments (e.g., plaster, stucco, terra cotta, masonry joints) o decorative finishes (e.g., paints and coatings, stenciling, wall paintings, gilding, wall coverings) o decorative elements (e.g., carved wood, molded plaster, metal ceilings)