Amendment 0011_Attachment A - List of Tower Maintenance and Repair Tasks.pdf

FY23 TAC Tower Repairs WON: 1736947 Various Locations - CONUS

FY23 TAC Towers Part 6, Attachment A - Page 1

Project Part 6

Attachment A

LIST OF TOWER MAINTENANCE AND REPAIR TASKS:

The following maintenance and repairs shall be completed as part of this RFP. Work task items are taken from the most recent tower inspection reports and from observation of the towers within six months of this RFP. The inspection reports include recommendations for maintenance and repairs for each tower. The reports list work tasks by urgency (i.e.

recommended timeframe to complete task). All work tasks listed in this RFP shall be completed as part of this contract regardless of the recommended timeframes. Maintenance and repair needs for each item are described in various sections of inspection reports (ex: 2 Inspection and Maintenance Detail, 3 Recommended Maintenance, Appendix A – Photographs). Contractor shall verify maintenance and repair listed in this attachment are in agreement with inspection reports to insure all repairs are completed.

Requirements in this attachment are of equal precedence to Part 3 of this RFP. Any discrepancies between the maintenance and repairs indicated in this attachment, Part 3 of this RFP, and the tower inspection reports shall be reported to the Contracting Officer immediately for clarification and resolution.

Proposal shall include cost estimate for maintenance and repairs to towers per Attachment F.

List of Towers

Base Bid:

1. Octopus Mountain – 160’ Self Supported, NAVBASE KITSAP Bremerton, Washington

2. Bogue Field – 140’ Self Supported, MCAS Cherry Point, North Carolina

3. Mockup Road – 60’ Self Supported, MCAS Cherry Point, North Carolina

4. SCI-Vista – 50’ Self Supported, NAVBASE Coronado, California

5. SCI-OP-1 – 80’ Self Supported, NAVBASE Coronado, California

6. Navy Dare – 140’ Self Supported, NAS Oceana, North Carolina

7. Bldg. 210 – 90’ Self Supported, NAS Oceana, Virginia

8. Target B20 (Center) – 60’ Self Supported, NAS Fallon, Nevada

Options:

OPTION A. Bogue Field – Ladder and Guardrails OPTION B. Navy Dare - Ladder OPTION C. Bldg. 465 – 54’ Self Supported, NAS Fallon, Nevada OPTION D. Starling – 386’ Guyed, MCB Camp Lejeune, North Carolina OPTION E. P-0 Point of Marsh – 120’ Self Supported, MCAS Cherry Point, North Carolina

FY23 TAC Towers Part 6, Attachment A - Page 2

Tower locations across the United States.

FY23 TAC Towers Part 6, Attachment A - Page 3

1. Octopus Mountain – 160’ Self Supported NAVBASE KITSAP Bremerton, Washington

Within One Year Structural Repairs

1.1 Properly connect the feed line to the waveguide bridge per Motorola R56 Manual. Use corrosion resistant hardware recommended by the transmission line manufacturer.

1.2 Remove the three abandoned cables, including associated hardware, from the southwest face near the 145-ft level.

1.3 Remove all active corrosion and clean all corroded areas on the tower member surfaces, connection bolts, safety climb hardware, waveguide bridge member surfaces, antenna mount and microwave dish stabilizer hardware, the equipment shelter steel and electrical meter to SSPC-SP2, Hand Tool Cleaning; SSPC-SP3, Power Tool Cleaning; SSPC-SP11 Power Tool Cleaning to a Bare Metal and/or SSPC-SP12 Surface Preparation and Cleaning of Metals by Water Jetting Prior to Recoating. Paint entire tower with coating system specified in UFGS 09 9713.25 provided as a GFI in Part 6 of the RFP. Surface protrusions of 1/8" or greater should be removed as part of the paint preparation process and care exercised to limit damage to the sound galvanizing near the protrusions. Test surface for soluble salt contamination and wash as needed until within paint manufacturer’s tolerance levels. Follow coating manufacturer’s instructions for proper coating conditions and application. Stripe coat (coat twice with primer) all areas of heavy corrosion by brush with intermediate epoxy coating specified to an additional 2-4 mil DFT thickness. The contractor should determine the application method that results in quality specified in the UFGS, subject to prior government approval in writing.

Finish paint color to match existing.

1.4 Remove unused antenna mount and hardware on the south leg near the 30-ft level.

Electrical Grounding Repairs

1.5 Provide and install non-metallic (nylon) clamps and fasteners for the three (3) tower structure foundation grounding conductors. Use the clamps and fasteners to securely mount the grounding conductors along their respective foundation. Provide schedule 40 PVC conduit as needed to help protect the conductors as they enter the earth.

1.6 Provide and install a new main exterior bus bar to replace the existing main exterior bus bar.

• Replace all corroded termination lugs with two-hole type stainless steel termination compression lugs on the exterior main bus bar. Connect the new replacement connectors to the new exterior bus bar. There are eight (8) total connectors that need to be replaced.

1.7 Resolve “OL” error high grounding reading for ground bonding conductor of the data and telephone cabinet to the interior grounding halo system.

1.8 Resolve 165.4Ω high grounding reading for ground bonding conductor of the exterior ground bar to the snow shield tray.

1.9 Resolve 353.9Ω high grounding reading for ground bonding conductor of the fencing to the gate near the north leg of the tower

1.10 Resolve 210.0Ω and 364.6Ω high grounding reading for ground bonding conductor of the fencing to the counterpoise near the WSP propane tanks.

FY23 TAC Towers Part 6, Attachment A - Page 4

1.11 Provide grounding connections to the HVAC unit on the main communication building.

1.12 Provide grounding connections to the (3) HVAC vents/louvers in the main communications building

1.13 Provide grounding connections to the adjoining cable tray points as needed in the main communications building.

1.14 Provide 2-hole compression lug connectors in place of all 1-hole compression lugs for grounding connections inside the main communication building (20 total replacements needed). With this replacement, it will more than likely require the replacement of both interior ground bus bars to have the available hole spaces.

1.15 Provide grounding connections to the cable bridge posts. (4 connections total).

1.16 Provide and install 6 ground conductor connections between the main exterior bus bar and the

(6) RF Cables that don’t have grounding connections.

1.17 Provide (3) RF Cable SPD/TVSSs with grounding connections to one of the main interior ground bars for the spare RF cables not being used.

1.18 Reconcile and remove any spare loose grounding conductors in the main communications building. Four (4) loose grounding conductors are in the northwest corner of the building and there were two (2) loose conductors at the radio cabinets in the middle of the building.

2. Bogue Field – 140’ Self Supported

MCAS Cherry Point, North Carolina Immediate Structural Repairs

2.1 Procure and install new galvanized 3M DBI SALA LAD-SAF Cable Vertical Safety System. Replace climb cable and install ID tag and top cap. Procure and provide (2) LAD-SAFE X3 Detachable Cable Sleeve systems sized to fit new LAD-SAF Cable Vertical Safety System

Within Two Years & OSHA Structural Repairs

2.2 Clean areas of corrosion on the beacon junction to SSPC-SP2, Hand Tool Cleaning; SSPC-SP3, Power Tool Cleaning; SSPC-SP11 Power Tool Cleaning to a Bare Metal and/or SSPC-SP12 Surface Preparation and Cleaning of Metals by Water Jetting Prior to Recoating. Paint cleaned areas with coating system specified in UFGS 09 9713.25 provided as a GFI in Part 6 of the RFP. Replace corroded hardware with corrosion resistant hardware.

2.3 Properly secure all loose and inadequately secured coax with stainless steel hardware and replace broken downlead clips.

2.4 Replace the deteriorated and peeling weatherproofing tape.

2.5 Reroute all incorrectly routed ground wires to achieve the required smooth downward path to the ground connection.

FY23 TAC Towers Part 6, Attachment A - Page 5

2.6 Replace air terminal (lightning rod) with a longer air terminal to extend a minimum of 10” above highest point on tower and/or tower equipment, whichever is highest. New air terminal and associated fittings must meet Minimum Class II Material Requirements per NFPA 780.

2.7 Conduct an engineering study per TIA 222H to determine if the existing 13.5” wide climbing ladder can be replaced with a 16” wide climbing ladder, and to determine if the existing 38” platform guardrails can be replaced with handrails 42” in height.

2.8 Widen the ladder way opening to meet the OSHA climbing side clearance standard of a 30” minimum. Submit modification drawings for approval. Any exposed steel must be coated to prevent corrosion. Paint touch ups to match existing paint color.

2.9 Correct the tower communication cabinet ground connection to the counterpoise where the "OL" (overload) condition was recorded indicating a broken/open conductor condition that needs to be corrected

2.10 Replace the existing USMC communication building ground conductor where the high resistance reading of 52.37Ω was observed

2.11 Install new TVSS/SPD device at the electrical panelboard serving the tower power needs

2.12 Provide and install flexible conduit sleeves for exposed tower ground conductors observed at the tower site

2.13 Remove and replace all mechanical ground lugs with two-hole long barrel compression ground lugs at the exterior ground bus at the tower communications cabinet

2.14 Replaced jumped ground conductor serving two RF surge suppressors in the tower communications cabinet. Each RF surge suppressor should be separately grounded to the exterior cabinet ground bus

3. Mockup Road – 60’ Self Supported

Immediate Structural Repairs

3.1 Remove two existing obstruction lights and replace with LED L-810 Steady Burning Lights, night vision goggle (NVG) compatible. Replace associated corroded conduit and condulet.

3.2 Procure and install new galvanized 3M DBI SALA LAD-SAF Cable Vertical Safety System. Replace

FY23 TAC Towers Part 6, Attachment A - Page 6

4. SCI-Vista – 50’ Self Supported NAVBASE Coronado, California

Immediate Structural Repairs

4.1 Remove the grout from around the tower legs at the base of the tower. Remove all corrosion from embedded leg column. Once the legs have been clean of corrosion, provide an engineering evaluation, including an evaluation of wall thickness. Paint the steel with cold galvanizing paint, install new grout and apply a crystalline waterproofing system to the exposed foundation.

Contractor to provide detailed repair recommendations (including calculations, design, shop drawings, etc), and cost estimate of repair.

Within One Year Structural Repairs

4.2 Replace the damaged rubber end cap for the safety cable energy absorber at the top.

4.3 Connect the feed line to the junction box for the omni antenna on the east leg near the 39-ft level.

4.4 Repair the damaged cable connector for the yagi antenna on the northwest leg near the 39-ft level.

4.5 Replace a missing spring for the HP4 dish shield on the southeast face near the 47-ft level.

4.6 Install air terminal (lightning rod) to extend above highest point on tower and/or tower equipment, whichever is highest. New air terminal and associated fittings must meet Minimum Class II Material Requirements per NFPA 780.

4.7 Remove and clean all corroded areas on the tower leg bases, safety climb hardware, waveguide bridge hardware, antenna mount hardware and grounding cables hardware to SSPC-SP2, Hand Tool Cleaning; SSPC-SP3, Power Tool Cleaning; SSPC-SP11 Power Tool Cleaning to a Bare Metal and/or SSPC-SP12 Surface Preparation and Cleaning of Metals by Water Jetting Prior to Recoating. Paint cleaned areas with coating system specified in UFGS 09 9713.25 provided as a GFI in Part 6 of the RFP.

4.8 Ground fuel tank per NFPA 780.

4.9 Reroute antenna cables to be complaint with Motorola R56.

4.10 Reroute ground conductors to avoid sharp bends and remove clamp straps.

4.11 Replace star washers at connections.

4.12 Replace single hole mechanical lugs with two-hole long barrel compression type lugs

4.13 Provide a new weld connection at tower leg where existing weld is corroded. Paint or galvanize exothermic welding to inhibit corrosion.

FY23 TAC Towers Part 6, Attachment A - Page 7

5. SCI-OP-1 – 80’ Self Supported NAVBASE Coronado, California

Immediate Structural Repairs

5.1 Remove the grout from around the tower legs at the base of the tower. Remove all corrosion from embedded leg column. Once the legs have been clean of corrosion, provide an engineering evaluation, including an evaluation of wall thickness. Paint the steel with cold galvanizing paint, install new grout and apply a crystalline waterproofing system to the exposed foundation.

Contractor to provide detailed repair recommendations (including calculations, design, shop drawings, etc), and cost estimate of repair.

5.2 Replace two missing leg splice bolts per TIA 222 with the same size galvanized A325X bolts: (1) on the northeast leg and (1) on the south leg at the 60-ft level

5.3 Tighten the loose leg splice connection bolts on the south and northwest legs at the 20-ft level and on the northwest leg at the 60-ft level per TIA 222.

5.4 Replace two broken lenses for the obstruction lights at the top of the tower.

5.5 Replace a missing cover for the electrical conduit junction box on the tower at the 61-ft level.

Note that the electrical wires are currently open at that location.

5.6 Repair concrete cracks at tower base with an epoxy concrete patch-material. Prepare the crack per patch material manufacturer’s instructions and ensure water is not trapped in the cracks before repair. Seal the repaired cracked concrete surfaces with a silicone-based water sealant compound.

5.7 Repair and properly secure the tilted and loose energy absorber for the safety cable on the tower at the top.

5.8 Replace the damaged rubber end cap for the safety cable energy absorber at the top.

5.9 Secure the loose cables between the waveguide bridge and the cable entry port near the equipment shelter.

5.10 Install air terminal (lightning rod) with a longer air terminal to extend 5’ above highest antenna.

New air terminal and associated fittings must meet Minimum Class II Material Requirements per NFPA 780. Use an extension of one of the tower legs to have the top of the lightning rod at an elevation of 5 feet above the top of the highest antenna

5.11 Reattach two grounding cables at the following locations: (1) on the south leg near the 25-ft level and (1) on the southeast face near the 60-ft level

5.12 Remove the abandoned U-bolt from the top of the tower

5.13 Remove and clean all corroded areas on the tower and antenna and feed line mount hardware, electrical conduit, conduit junction boxes and conduit support hardware to SSPC-SP2, Hand Tool Cleaning; SSPC-SP3, Power Tool Cleaning; SSPC-SP11 Power Tool Cleaning to a Bare Metal and/or SSPC-SP12 Surface Preparation and Cleaning of Metals by Water Jetting Prior to

FY23 TAC Towers Part 6, Attachment A - Page 8

Recoating. Paint cleaned areas with coating system specified in UFGS 09 9713.25 provided as a GFI in Part 6 of the RFP.

Electrical Grounding Structural Repairs

5.14 Install an interior ground bus bars.

5.15 Replace single-hole mechanical lugs with two-hole long barrel compression type lugs.

5.16 Install exterior ground bus bars per Motorola R-56.

5.17 Install TVSS devices for IT racks.

5.18 Ground IT racks and equipment.

5.19 Install Halo ring ground system inside the bunker per Motorola R-56 standards.

5.20 Install underground ground ring (counterpoise) throughout the exterior of the site per NFPA 780.

5.21 Install a grounding system for tower and Communication Building compliant with Motorola R-56 and NFPA 780 standards.

5.20 Perform a site survey and equipment assessment to accurately define the grounding system coverage requirements and limits in conjunction with the government. Conduct an engineering analysis and prepare a grounding system design in compliance with Motorola R-56 and NFPA 780 standards. Final design must be signed and stamped by a Registered Professional Engineer.

Provide a construction cost estimated derived from the finalized design.

6. Navy Dare – 140’ Self Supported

NAS Oceana, North Carolina Immediate Structural Repairs

6.1 Conduct engineering evaluation and design the installation of a new fixed ladder on Face A.

6.2 Remove existing climb system and Procure and install new galvanized 3M DBI SALA LAD-SAF Cable Vertical Safety System. Replace climb cable and install ID tag and top cap. Procure and provide (2) LAD-SAFE X3 Detachable Cable Sleeve systems sized to fit new LAD-SAF Cable Vertical Safety System

7. Bldg. 210 – 90’ Self Supported NAS Oceana, Virginia

Immediate Structural Repairs

7.1 Troubleshoot incoming power to tower. Contractor to provide a detailed scope of work to repair power to the tower and cost estimate.

8. Target B20 (Center) – 60’ Self Supported NAS Fallon, Nevada

FY23 TAC Towers Part 6, Attachment A - Page 9

8.1 Remove existing obstruction lights and replace with LED L-810 Steady Burning Lights, night vision goggle (NVG) compatible.

8.2 Replace the damaged pipe mount for the Antenna Products DPV-37 antenna located on Leg C at the 44' level.

8.3 Remove the bare copper downlead cable along Leg A and bond the lightning rod to the structure at the top of the tower.

8.4 Install proper hanger support to replace the tape that was installed by the inspectors to temporarily secure coax lines at both platforms and at the 52' level, Face A location. This requires five each ½" hanger assemblies with angle adapters and one 4 cable cushion bundle standoff assembly for 7/8" coax.

8.5 Move the horizontal stabilizer for the Taco antenna to the top of the tower and use pipe clamps to brace the stabilizer in two locations to tower structural members. The second brace will require a custom bracket. Remove all hose clamps, new hardware per Motorola R56 Manual.

Use corrosion resistant hardware recommended by the transmission line manufacturer.

8.6 Remove the bird nest from the second platform level. Contractor to coordinate with NAS Fallon's environmental department.

8.7 Perform the following maintenance actions related to the ground system adhering to the Motorola R56 standard for transmission line grounding:

• Remove the coax entry bus bar and install a new bar below the entry point. Reinstall all the coax ground leads at the entry and connect the leads to the new bus bar. Connect the bus bar to the ground ring system. See Hanson Professional Services, Inc. report for recommendations related to the ground ring system.

• Relocate the position of the coax ground kits at the lower bend to above the bend.

Install a tinned copper bus bar below the new ground kit locations. Connect the coax ground leads to the new bus bar. Bond the bus bar to the tower and to the ground ring system.

• Reroute, resize, relocate coax ground kits as needed near their antennas to ensure the leads run in a smooth downward path to ground.

• Reapply weatherproofing tape at the coax ground kit for the Leg C dish at the 40' level.

Within Two Years Structural Repairs

8.8 Procure and install new galvanized 3M DBI SALA LAD-SAF Cable Vertical Safety System. Replace

8.9 Replace the safety chains at the openings for both platforms with self-closing gates. All new tower steel must be painted with coating system specified in UFGS 09 9713.25 provided as a GFI in Part 6 of the RFP. Color to match existing. Contractor to submit shop drawings for approval.

FY23 TAC Towers Part 6, Attachment A - Page 10

Electrical Grounding Structural Repairs

8.10 Replace conductor connections at tower legs that have rust/corrosion. Remove rust/corrosion and spray cold galvanized compound at connection for protection.

8.11 Perimeter fence posts to be grounded. Install ground conductors by exothermic weld to fence posts and connect to existing underground counterpoise system.

8.12 Tower to have ground bus bar installed with conductor and connect to the existing underground counterpoise system.

8.13 Provide and install ground conductors for external grounding of HVAC units to building exterior ground bus bar.

8.14 Exterior ground bus bar to have ground conductor installed and connected to the existing underground counterpoise system to establish a more direct path to ground.

8.15 Cable entry port to have an interior Master Ground Bus bar (MGB) installed.

8.16 Interior perimeter halo ground ring system to be installed and all equipment to be connected for equipment bonding to ground.

8.17 Communication racks to be grounded to new halo ground ring system. Communications racks are currently bonded to bare copper ground conductor.

8.18 Provide and install TVSS devices at panelboards.

8.19 RF cables to have SPDs installed and are ground to new MGB

8.20 Standby power generator to have ground conductor installed and bonded to the existing site grounding system for an external ground path to be established.

8.21 Cable tray system to be grounded back to new MGB. Bond sections of cable trays together by providing ground conductor (jumpers) and connections between sections.

8.22 Single hole mechanical type lugs to be replaced with two-hole long barrel compression type connections.

OPTION A. Bogue Field – 140’ Self Supported

A.1 Remove existing ladder, and install new ladder per ANSI A14.3, OSHA Standard 1910.23 and TIA

222. Paint ladder to match existing color banding.

A.2 Replace the platform guardrail with a new guardrail 42” in height. New guardrail must be compliant with OSHA standard 1910.29 and TIA 222. Paint guardrail to match existing color banding.

FY23 TAC Towers Part 6, Attachment A - Page 11

OPTION B. Navy Dare – 140’ Self Supported NAS Oceana, North Carolina

B.1 Remove existing ladder, and install new ladder on face A of tower per ANSI A14.3, OSHA Standard 1910.23 and TIA 222.

OPTION C. Bldg. 465 – 54’ Self Supported NAS Fallon, Nevada

Immediate Structural Repairs C.1 Lower the light fixture to 4.5' above the platform level so that a technician can access the fixture while standing on the platform floor. All work must conform to TIA 222. Touch up paint any areas that result on exposed steel.

C.2 Replace the light bulbs and correct any other defects that would prevent the lights from working. Replace the conduit from the waveguide ladder to the top platform junction box.

Relocate the top platform junction box 3' above the platform floor.

All work must conform to TIA 222, NFPA 70 and UFGS 26 05.00 40 Common Work Results for Electrical.

C.3 Remove all the unused equipment on the tower including the dead end runs of transmission lines and the smaller bus bars no longer in use (Contractor to verify with SPOC prior to removal).

C.4 Replace the tie wire that secures coax lines to a step bolt on Leg B with proper coax hangers per Motorola R56. Secure the coax to structural members rather than to step bolts.

C.5 Properly seal the one coax port at the building entry.

C.6 Install additional bolts to properly bond the coax ground kits with 2 hole lugs to the entry bus bar. Install coax ground kits on the ungrounded coax lines at their lower bend on the tower. 14 each ½" coax lines were not grounded at the tower

C.7 Communications rack to be grounded to the entry port grounding system.

C.8 Communication rack equipment to be grounded to rack bus bar.

C.9 Additional bolts to be installed on existing two-hole long barrel connections.

C.10 Replace existing ground plating system with standard grounding system in conformance with Motorola R56 and NAVFAC standards.

FY23 TAC Towers Part 6, Attachment A - Page 12

OPTION D. Starling – 386’ Guyed MCB Camp Lejeune, North Carolina

Immediate Structural Repairs D.1 Procure and install new galvanized 3M DBI SALA LAD-SAF Cable Vertical Safety System. Replace

OPTION E. P-0 Point of Marsh – 120’ Self Supported

E.1 Remove construction fencing around the second platform that creates a tripping hazard.

E.2 Procure and install new galvanized 3M DBI SALA LAD-SAF Cable Vertical Safety System. Replace