Amend 3 Attach 1 DRTO 241934 QA Part 2_0003.pdf

Solicitation No. 140P2020R0004 – Amendment No. 3

DRTO 241934 – Preserve Tortugas Harbor Lighthouse

Bid Questions & Answers (22 thru 78)

22. How long do you expect it will take the NPS to review the proposed documentation required prior to allowing the actual disassembly?

The Government will move quickly to review the required Division 1 documents to allow the project to move forward as efficiently as possible. The duration is highly dependent on the quality of documents submitted.

23. Please clarify the documentation requirements at the metal shop. Are the metal units to be documented before and after the finishes have been removed?

The Contractor will be required to document the entire process in accordance with Specification

Sections 01 32 33, Photographic Documentation for Historic Preservation Projects and Section 01 35

91, Historic Preservation Treatment Procedures.

24. Has anyone documented the original finishes? Is that required?

A materials analysis has been documented in Attachments 7 and 8 from Amendment No. 2.

25. Please clarify what documentation is required for reassembly.

The contractor will be required to document the entire process in accordance with Specification

Sections 01 32 33, Photographic Documentation for Historic Preservation Projects and Section 01 35

91, Historic Preservation Treatment Procedures.

26. Are there intervals when the NPS or engineer are scheduled to examine the structure during disassembly? For example, documenting the water proofing at the roof panels (sheet 14).

The NPS will have a representative present for the majority of the disassembly and reassembly process along with regular, periodic inspections at the off-site treatment facility.

27. Is the engineer of record going to be on-site during disassembly?

See Response to Question 26.

28. Are as-built drawings required or can we simply key new elements in existing drawings.

The contractor will be required to maintain Project Record Drawings in accordance with

Specification Section 01 77 00, 1.2. The Project Record Drawings document changes, deletions and additions to the Contract Documents.

29. As part of the Historic Preservation Treatment Procedures that are supposed to be submitted prior to the start of work both the disassembly and reassembly techniques and steps including Key Plan for reassembly are required. Can this be a proposed reassembly key plan until it is disassembled? It would make more sense to submit the reassembly plan after the light house is disassembled and before re-assembly. Can we submit the reassembly plan after the cast iron is conserved?

In accordance with Specification Section 01 35 91, 1.3D, The final Key Plan is submitted upon completion of disassembly.

30. Specification 02 83 19 has paragraphs 1.4.a and 1.4.b regarding scope of work for the field disassembly and paint removal. As the project documents call for the metals to be transferred offsite, and as the metals will be restored in a contained shop environment, can the paint removal be conducted by the metal restoration company within a licensed facility in lieu of a separate paint removal contractor utilizing water jet processes?

The contractor may conduct paint removal activities within a licensed facility. The contractor is required to follow all applicable laws and regulations in Accordance with Specification Section 02 83

19, Lead-Based Pain Remediation.

31. Per paragraph 3.2.b of section 02 83 19 will it be acceptable to utilize other paint removal and containment methods(such as chemical stripping or vacuum shrouded power tool cleaning) onsite to remove paint prior to disassembly operations?

The Contractor shall complete all lead-based paint removal activities in accordance with

Specification Section 02 83 19. The contractor shall consider site limitations and timing of disassembly activities and potential impacts of upcoming hurricane season.

32. What is the amount of space that will be available to contractors on the crew ship for tools and equipment to be transported to Garden Key?

The availability of the MV Fort Jefferson is limited and described in Specification Section 01 11 00, 1.5.A.10.f. The MV Fort Jefferson is available to contractors for personnel transport along with groceries and personal items. Tools and equipment are not permitted on the MV Fort Jefferson.

33. Will the hoist be available to the contractor for loading and unloading of equipment?

No. Contractors will not be permitted to use the hoist.

34. Will the contractor be allowed to work on the Masonry past the June 1st / Hurricane season deadline ?

See Bid Clarification No. 2 from Amendment No. 2.

35. Can the existing scaffolding on the parade level be modified so that the masonry work can be done after the lighthouse is dismantled or must it all be removed by June 1st?

In accordance with Specification Section 01 11 00, 1.4.A, upon issuance of the Notice to Proceed, the existing scaffolding becomes the property of the contractor and may be modified as deemed necessary by the contractor. See Bid Clarification No. 2 from Amendment No. 2, issued on February

26, 2020 for information regarding June 1, 2020 date.

36. Does the Contractor need a QC person on site during dismantling?

Yes. The Architectural Conservator and/or Quality Control Supervisor must be on-site during disassembly. If qualified, the Architectural Conservator/Quality Control Supervisor may be the same person. The Architectural Conservator is responsible for development and tracking of the Key Plan during disassembly. Please see Question and Answer No. 20 in Amendment No. 2.

37. Other than the size restrictions are there any other restrictions on bringing equipment to the job site?

The contractor is required to complete the work while remaining within the fortification and within the designated construction zones and staging areas as identified on Sheet G0.2. The contractor shall follow the restrictions indicated in the Contract Documents.

38. The lighthouse currently has temporary scaffolding and shoring. Please provide the design calculations and drawings for the existing temporary scaffolding system.

See Attachment No. 4 from Amendment No. 2 for scaffolding drawings. Design calculations are not available. Contractor must evaluate, design and modify the existing scaffolding as necessary to complete the work.

39. A structural analysis was previously performed deeming the required restoration and temporary support measures currently in place (scaffolding). Please provide.

See Attachment No. 6 from Amendment No. 2.

40. The Addendum 1 solicitation mentions site meeting notes were provided. However, the latest updates provided on 2/20/2020 on the beta.sam.gov website do not reflect this. When will the site meeting notes be released?

The pre-bid sign in sheet was provided in Amendment No. 1. No project specifics were provided during the meeting that aren’t covered in the contract documents. Any questions were requested in writing and included in Amendment No. 2 or No. 3.

41. Will contractors have access to condition assessment and other previously completed documentation, particularly of a visual nature, of the harbor light and any surrounding areas which may be subject to disassembly or disruption?

The Condition Assessment was provided in Attachment No. 6 from Amendment No. 2. See response to Question 46.

42. Will visual tools such as general photography, photogrammetry, LIDAR and other prior documentation (pre scaffolding) the NPS or prior contractors have in their possession be made be available? Pre work product “raw" documentation may be useful.

No additional information will be provided.

43. Can representative samples of any of the above be provided, or links made available to already available information posted?

The Government has provided all information deemed necessary in Amendments No. 1, 2 and 3.

44. Project drawings on sheet SD0.1 show locations for two scaffold hoists. Are these locations required?

See General Note B and Sheet Specific Notes 3 and 4 on SD0.1.

45. Is the contractor permitted to select the hoisting system deemed most efficient and beneficial to the project? Or does NPS retain the right to dictate means and methods on the hoisting system?

See General Note B and Sheet Specific Notes 3 and 4 on SD0.1. The contractor may select and alternate hoisting system if deemed appropriate by the contractor’s engineer. Alternate approaches must be submitted for review after award to ensure appropriate protection of existing structure is being addressed.

46. Highlighted on page 2 of the Tortugas Harbor Light NPS brochure, it mentions a documentation package was to be put together in 2017 including photographs, architectural drawings and a laser scan for the Garden Kay Lighthouse. Is this information available?

Please see the attached link for available information.

https://www.nps.gov/hdp/exhibits/drto/drto_index.htm

47. Is the contractor permitted to adjust, modify or alter the scaffold in any manner deemed necessary to accomplish the mission for dismantle of the lighthouse assuming all changes will be engineered and sealed included expanding the footprint of the scaffold if needed?

See Response to Question 35.

48. What limits are placed on the types of hoisting systems selected for dismantle and/or reconstruction of the lighthouse?

See response to Question 45. The contractor is required to complete the work while remaining within the fortification and within the designated construction zones and staging areas as identified on Sheet G0.2

49. Is the use of a helicopter for hoisting during dismantle and/or reconstruction permitted with proper engineered and vetted plans?

No.

https://www.nps.gov/hdp/exhibits/drto/drto_index.htm

50. Is the contractor permitted to locate hoists at location determine most advantageous by the contractor?

See response to Question 45.

51. After dismantle and lowering of lighthouse components to the parade ground, is it permitted to stage components on the parade ground while other components are dismantled?

Yes, provided staging is located within designated areas.

52. How long may items be staged in the temporary staging area designated by Note 9 on sheet G0.2 while waiting for transport off the island?

Staging in temporary staging area should be limited to 48 hours while waiting for transport.

53. Is it permitted to dismantle all lighthouse items and crate them for transport prior to bringing in a barge for loading and shipment?

Yes.

54. Is it required that dismantled items go directly from the lighthouse to the parade grounds and then directly onto a barge? Or can dismantled items be staged at locations permitted by NPS until all items can be loaded on a boat for transport off the island?

See response to Questions 51, 52 and 53.

55. Is the use of material handling equipment permitted over bare soil conditions?

The contractor is required to protect existing conditions. Protection measures must be used if the proposed activities will damage the existing soil. Measures shall be coordinate with Government prior to commencement of activities.

56. Note 8 on sheet G0.2 states to protect existing cactus during construction operations. At the site visit it was agreed by everyone there that the cactus has grown to be supported by the scaffold surrounding it. Given this assessment, how shall the contractor treat the scaffold surrounding the cactus? Shall the scaffold remain in place to support the cactus, or be dismantled? If dismantled, who is responsible for the well-being of the cactus during the dismantle process?

The Government will be cutting back the cactus prior to commencement of work. The scaffolding must be carefully removed around the cactus. Scaffolding will not remain around the cactus upon completion of the work. The contractor must protect the cactus during performance of the work.

57. It is stated in paragraph 1.10.B that no off-season temporary storage is permitted at Garden Key.

Please confirm if the contractor will not be permitted to store items at the north coaling dock at the contractor’s risk during the off season?

Contractors will not be permitted to store items at the north coaling dock during the off-season due to risks associated with potential hurricanes.

58. Please provide drawings of the dock bridge?

Dock bridge drawings are not available.

59. Please confirm that only use of US Coast Guard approved vessels are permitted to bring equipment and supplies to Fort Jefferson?

Contractors are required to follow all applicable maritime laws associated with delivery of equipment and supplies to Fort Jefferson.

60. Are privately owned vessels permitted for transport of crew and food rations to and from Fort Jefferson?

Yes. Deliveries shall be coordinated with park prior to scheduling due to landing limitations at the site. Private vessels will be subject to all DRTO boating rules and regulations as well as all associated

Florida Keys National Marine Sanctuary rules and regulations.

61. Solicitation states on page 25 that a conservator is required as a Key Trade. There is little to no information on required duties/responsibilities or roles of the conservator in the solicitation or specifications. What are required responsibilities or roles of the project conservator?

See response to Question 20 in Amendment No. 2 and the included description.

62. Is the project conservator expected to be a full-time role? What are the minimum qualifications for the project conservator?

See response to Question 20 in Amendment No. 2 and the included description. It is anticipated the architectural conservator is a full-time role on the project.

63. If the contractor needs to exceed 10 persons overnight on the island for short durations of time will NPS accommodate the lodging request? Or is the contractor strictly limited to 10 persons on the island for the entire duration of the project? There may be times during select operations that up to 14 persons are needed to maximize efficiency of operations.

The contractor is limited to 10 crew members on a nightly basis.

64. Where will weekly progress meetings be held given the multiple locations of work for this project?

Weekly progress meetings will be held at an appropriate location depending on the stage and location of work. Most team members will be participating via conference call.

65. Pre-installation conferences are required in the specifications. Please confirm they are required onsite at Garden Key? How far in advance of each pre-installation meeting must each meeting be requested by the contractor?

Pre-installation conferences are not required to be at Garden Key depending on the tasks being discussed and the present stage of the project. Due to location considerations associated with certain aspect of the work, coordination will need to be as far in advance as possible to facilitate site visits by appropriate project personnel.

66. Contractor Environmental Manager description is noted in section 01 31 00 paragraph 1.7. Please confirm if this is a full-time independent position for the project? Or if this person can also serve as the project superintendent?

The Environmental Manager is not intended to be a full-time position. The Superintendent may serve as the Environmental Manager and complete the associated duties.

67. Will NPS release to the awarded contractor dwg files of existing scaffold/shoring plans as well as plans of the lighthouse for modification and use on the contract?

The awarded contractor may be given certain digital files, if deemed appropriate. The contractor is required to provide their own hard copies of the contract documents to use in record drawing tracking and performance of the contract.

68. Can site safety officer also serve as superintendent?

See response to Question No. 1 in Amendment No. 2.

69. Is it the intent of NPS to limit removal of paint from lighthouse components during Phase I dismantle to the greatest extent possible for only dismantle purposes and then to remove paint coatings from lighthouse components entirely during Phase II when the components are in a controlled facility at the contractors shop?

Yes. See the response to Question 31. The Contractor shall complete all lead-based paint removal activities in accordance with Specification Section 02 83 19. The contractor shall consider site limitations and timing of disassembly activities and potential impacts of upcoming hurricane season.

70. Section 02 83 19 for lead based paint requires removal of paint from wrought iron and cast iron by water jetting. Is it acceptable for the contractor to use other means of paint removal including dry removal methods that are commonly accepted on similar sensitive historic projects?

The contractor shall bid methods included in the contract documents.

71. Is use of Sponge Jet micro-abrasive paint removal and surface preparation method acceptable for removal of all paint from wrought iron and cast iron components in Phase 2?

The contractor shall bid methods included in the contract documents.

72. Does locally sourced sand from the moat near Bastion 5 and old seaplane ramp require washing prior to use?

Some processing may be required. The Contractor must meet the requirements of Specification

Section 04 01 20, Masonry Repointing and Repair, in performance of the work.

73. Is the contractor required to use the existing scaffolding for the purpose of dismantle or can the scaffolding be removed to allow the installation of an alternate scaffolding/shoring plan?

See the response to Question 35.

74. 01 11 001.2 B 1 states, “ All components shall be lowered to grade within the Parade Ground and transported from the base of Bastion 6, through the sally port to the main dock area for loading on a vessel and transported to an off-site, contractor-furnished facility.

Page 14 of the Contractor Price Schedule states, “ All components shall be lowered to grade within the Parade Ground and transported from the base of Bastion 6, through the sally port to the main dock area for loading on a vessel and transported to an off-site government-furnished storage facility (former HM69 Nike Missile Base - Warehouse C in Everglades National Park). Phase I –

Disassembly shall be complete by June 1st, 2019. Please clarify where the disassembled items are to go.

See response to Question No. 11 in Amendment No. 2

75. For replacement of radius sill and head angles, C6, WT4, and corner seam plates can the component be fabricated using built up construction or do they need to be fabricated from rolled steel components?

No, the components should be hot-rolled steel rather than built-up sections since we don’t want welded seams to show along these components.

76. A AWS CWI consultant stated the ultrasonic and magnetic particle weld testing procedures outlined in 05 03 12 and 05 03 13 are typically used on materials greater than 5/16”. The average thickness of the wrought iron is stated to be ¼”. Additionally, the age and composition of the wrought and cast iron is subject to inclusions that will create a substantial amount of false positives using the required testing methods. The CWI consultant did not recommend these test methods for these applications.

Will NPS provide direction for alternative testing methods that can be used for the weld inspections?

There will be no change to the weld inspection method. The inspections should be bid as specified.

77. It is stated in 05 03 12 “High-strength steel bolts conforming to ASTM A325. Bolt heads shall be custom fabricated with rounded, flat, or truncated cone heads to match original rivets where visible.” Please clarify if the custom bolt heads are required to be engaged by a tool to install or remove the bolt.

The custom bolts should be tension control bolts, which can be installed from behind without the need to engage the custom bolt heads.

78. 05 03 13 H 2 “Prepare patch from wrought iron or low-carbon steel such that orientation in which the patch material was rolled matches the orientation of the original material (i.e., slag inclusions wrought iron should be parallel.” Please clarify if the repair to the cast iron should be made with wrought iron or cast iron?

Cast iron repairs should be made with cast iron. This repair may be found to be infeasible once the panels are stripped of paint and examined in the shop. Adjustments may need to be made to the repair and/or repair scope once paint has been removed and existing conditions have been confirmed. Please price the work as specified, as cast iron.