RFIS_-_Repair_MG1_and_DC_SB_SUB3.pdf

RFIS - N40085-19-B-3614

REPAIR MG1 AND DC SWITCHBOARD SUBSTATION 3

REQUEST FOR INFORMATION (PRE-BID)

N40085-19-B-3614

1. Please provide equivalent source impedances or (short circuit current and X/R) under the minimum fault current scenario at the Substation 3 2400V switchboard. This will be used to verify the reduced voltage starter type called out on E103.

A. The source impedances for Substation 3 2400V switchboard are not available. The contractor’s Engineer of Record shall determine these values as part of the design effort.

2. Please provide equivalent source impedances or (short circuit current and X/R) under the maximum fault current scenario for feeder 3-5A. This will be used to verify the rating of the 15kV sectionalizing switch.

A. The source impedances for feeder 3-5A are not available. The contractor’s Engineer of Record shall determine these values as part of the design effort.

3. Please provide the motor generator data sheets for the reference motor generator which was reviewed during the walk through.

A. Equipment reference drawings are provided in the RFP package, Part 6, Attachments.

4. In the project program part three sections B2020 Exterior Doors and B203004 Sectional

Overhead doors are called to be replaced to match existing. There are no pictures or historical information in the proposal package to be able to understand what to match in terms of material, dimension and detail. We need this information to be able to price these items.

A. The exterior doors shall be replaced to fit, form and function using the materials and requirements of section B2030 Exterior Doors and B203004 Sectional Overhead

Doors.

5. The scope of work says that a Fire Protection Specialist is required. Is this just a spec carried over from another project? Please advise.

A. The contractor shall provide a Licensed Fire Protection Engineer. The Fire Protection

Engineer shall review the existing fire protection system in Building 175 for code compliance, and shall provide recommendations based on the new equipment being provided. Upgrade, modification, or replacement of the existing fire protection system in Building 175 is NOT required in this contract.

6. Due to the amount of time required obtaining pricing from the vendors, we respectfully ask for an extension of time for submitting the bid package to 16 April 2019. Please advise.

A. The date to submit a bid package is extended to Friday April 12, 2019. All other bid package requirements of the RFP apply.

7. Will the Contractor be allowed to utilize the existing bridge crane in the work area to assist with removal of existing equipment and installation of new equipment? - General

A. The contractor will not be permitted to use the existing bridge crane in Building 175.

The contractor shall provide all lifting, handling, and rigging.

8. Will the Contractor need to provide temporary power generation provisions on the project during the period after the existing motor generators are removed and the area is prepared to receive the new equipment (i.e., demolition of existing foundations, excavation for new foundation, placement of new foundation, new conduit, cable, etc.)? - General

A. The contractor will not be required to provide temporary DC power generation during the construction period. Sequence of work requirements are described in section

G4095

9. Can NAVFAC extend the bid date for this project two weeks, to April 23, 2019, to allow offerors and equipment suppliers additional time to prepare proposals? - General

A. The date to submit a bid package is extended to Friday April 12, 2019. All other bid package requirements of the RFP apply.

10. Can NAVFAC provide as-built documents and equipment cut sheets of the reference equipment in Buildings 238 and 240? - General

A. Equipment reference drawings are provided in the RFP package, Part 6, Attachments.

11. The requirements are clear that the Superintendent cannot also serve as the Quality

Control Manager (QCM) or the Site Safety and Health Officer (SSHO), but can the same individual serve as both the QCM and the SSHO? - RFP Part 2, Attachment A, Multiple

Paragraphs

A. The contractor shall provide a Project Superintendent, Quality Control Manager

(QCM), and Site Safety and Health Officer (SSHO), and each shall be a separate person.

12. Please confirm that the full extent of the activities and documentation assigned to the

Contractor in this section is indeed the intent of NAVFAC. If so, please confirm that

NAVFAC will provide the access and support described in this section to facilitate this process in the time frame required. - RFP Part 2, Section 36, Pages 12-16

A. The contractor shall provide a Maine Historic Engineering Record Addendum as described in Part 2, Section 36. NAVFAC will provide reports and documentation as listed in Section 36.

13. Please indicate if hazardous soils and/or water are expected to be encountered during the removal of the existing generator foundations and excavation for the new foundation. -

Drawings ED101 and E101; Specifications Section 31 23 00.00 22

A. The project includes demolition of lead cable, concrete floor, and asbestos material

(ACM) in switchgear and control room. All hazardous waste generated shall be brought to Hazardous Waste Storage Facility (B-357). Soil generated shall also be managed through the Hazardous Waste Storage Facility (B-357). Concrete dust and silica controls shall be provided during demo of floor area.

14. Are wood personnel doors indeed desired for the project, or will hollow metal doors be allowed? If wood doors are desired, is there a requirement for raised panels or other detailing to meet historical requirements? - RFP Part 3, Section B2030

A. The exterior doors shall be replaced to fit, form and function using the materials and requirements of section B2030 Exterior Doors and B203004 Sectional Overhead

Doors.

15. Please confirm that a motorized operator is not required for the new section overhead door. - RFP Part 3, Section B203004

A. The exterior overhead door is NOT required to be motorized. However, mechanical lift assist shall be provided in accordance with section B203004.

16. Please confirm that the generator ventilation system will utilize outside intake air only, and no new cooling equipment provided as part of this project? Can as-builts of the existing air intake and exhaust inlets/outlets and/or ductwork that we can potentially tie into be provided by NAVFAC? - RFP Part 3, Section D30 and Drawings M101and M102

A. Make up air may be drawn from and exhausted to the space where approved by the contractor’s Engineer of record. The Engineer of Record shall determine if outside make up air or additional motor generator cooling is required.

17. Please clarify if galvanized steel ductwork and accessories or stainless steel ductwork and accessories are required for the ventilation system. - RFP Part 3, Section D304001

A. The contractor’s Engineer of Record shall determine if duct work is required. If duct work is required, it shall be galvanized.

18. Are there any specific appearance requirements for the remote control station to meet historical requirements? - RFP Part 3, Section E1030

A. Provide a remote station in accordance with section E1030 and drawing sheet E105.

There are no additional historical requirements for the station.

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