80GSFC22B0004 Amend 002 Attachment 001 Pre Bid Q_A .pdf
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- Solicitation number
- 80GSFC22B0004
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This document provides questions and responses related to solicitation number 80GSFC22B0004 from the National Aeronautics and Space Administration Goddard Space Center. The scope of work includes portland cement concrete spall repairs, full depth repairs, full slab replacements, crack sealing, joint sealing, and asphalt concrete seal coating at Wallops Airfield. An organized site visit will take place on August 11, 2022 for interested contractors to visit work sites. Electronic bids are due by August 30, 2022 and bid opening will occur via Microsoft Teams at 2:00pm the same day. Questions regarding the solicitation must be submitted in writing by August 12, 2022. The awarded contract will be a firm fixed price construction contract.
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AMENDMENT 002, ATTACHMENT 1
Wallops Airfield Repair Project, FCLP Phase 9
Invitation for Bid (IFB) 80GSFC22B0004 Pre-Bid Questions and Responses
# Questions Responses 1 I noticed that project had some concrete spall repairs, full depth repairs, sealing and joint sealing. Do you guys have a certain specification for the material used and if so, what it is?
The specification for the concrete spall repair material can be found under Specification, Section 32 01 29.61. The specification for full depth repairs can be found under Specification, Section 32 13 14.14. The specification for the material for sealing of joints in rigid pavement can be found under Specification, Section 32 01
19.61. The specification for the material for
asphalt seal coating can be found under Specification, Section 32 01 13.63.
2 Are there any areas where work can be performed while the tower is closed?
The Contractor shall coordinate with NASA Airfield Operations and the installation of low-profile barricades for maintenance of traffic, work can be performed while the tower is closed in the Option 1 area on the D-1 ramp and the Option 2 area on Taxiway Alpha. Work shall not be performed in the Base Bid area on the Runway 28 approach while the tower is closed.
3 How will the scope of work change if the subgrade under the full slab depth repairs are found to be unsound?
The Contractor shall provide, place, and compact select fill in accordance with Specification, Section 31 23 00.00. The Contractor shall provide, place, and compact 8" base course per Drawing SK-2, Detail D. Assume 50 cubic yards of base course material and 70 cubic yards of select fill material required total for Option 1.
Contractor shall provide a unit price per cubic yard for base course material and select fill material.
4 Something was stated about grounding pins in the 3 x 3 section of full depth slab repair what did that entail?
The Contractor shall replace existing static ground receptacle in accordance with Drawing SK-1, Detail B and Specification Section 34 73 16.
5 Confirmation on taxiway alpha that only a seal coat of asphalt will be placed within the scope of work and no crack seal will be needed to seal cracks beneath new asphalt layer?
The Contractor shall provide sealing of cracks in bituminous pavements per Specification Section 32 01 17.61 prior to application of the seal coat.
Assume 1500 linear feet of crack sealing required total for Option 2. Contractor shall provide a unit price per linear foot for crack sealing.
6 Option 1 - How is unstable subgrade to be handled under the 9 slabs that are known to have voided subgrade?
The Contractor shall provide, place, and compact select fill in accordance with Specification Section 31 23 00.00. The Contractor shall provide, place, and compact 8" base course per Drawing SK-2, Detail D. Assume 50 cubic yards of base course material and 70 cubic yards of select fill material required total for Option 1. Contractor shall provide a unit price for base course material and select fill material.
7 Option 1 - There are 3 slabs out of the 9 to be replaced that have existing tie downs. Are the tie downs to be replaced and is there a detail for this?
The Contractor shall replace existing mooring eyes in accordance with Drawing SK-1, Detail A and Specification, Section 34 73 13.
8 Option 1 - There is a grounding location in one of the slabs to be replaced. Is this to be replaced and is there a detail for this?
The Contractor shall replace existing static ground receptacle in accordance with Drawing SK-1, Detail B and Specification Section 34 73 16.
9 Option 2 - Is there suppose to be crack sealing prior to seal coating?
The Contractor shall provide sealing of cracks in bituminous pavements per Specification Section 32 01 17.61 prior to application of the seal coat.
Assume 1500 linear feet of crack sealing required total for Option 2. Contractor shall provide a unit price per linear foot for crack sealing.
10 There is vegetation overgrown along the edge of the taxiway and some vegetation in cracks on the taxiway. Is the contractor responsible for removal of vegetation prior to placement of seal coat?
The Contractor shall remove vegetation prior to the placement of seal coat. Vegetation shall be sprayed with glyphosate per manufacturer's recommended rate and removed after 7 days.
11 Any grooving on the Wallops Airfield Repair project?
The Statement of Work (SOW) does not include grooving.
12 Also, if it does include grooving, how can I obtain a copy of the plans and specs?
The SOW does not include grooving.
13 Will the use of lithium in the mix design be allowed as a mitigation strategy for ASR?
The use of lithium in the mix design will be allowed as a mitigation strategy for ASR in accordance with Specification, Section 32 13 14.14.
14 Detail D on Sheet CS501 states, "DO NOT USE DOWEL ON CJ". Is this correct that no dowels are to be placed at contraction joints?
The Contractor shall place dowels on all joints including contraction joints.
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