Q_A_0002.pdf

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Q: There are multiple site locations, in order to plan accordingly how far of a drive is it from each meeting location with USGS per site, we noticed some locations would require 4X4 vehicles and long trips.

A: Most of our radio communications sites are remote mountaintop sites and require 4x4 vehicles for access. The contractor/vendor should expect to traverse unimproved (e.g. dirt, grass, gravel) roads; only a handful are accessible by paved road.

On average, the primary microwave relay nodes are approximately 60 miles apart. The contractor/vendor should expect to drive 1 – 2 hours between sites due to the slow speeds required to safely traverse unimproved mountain roads.

USGS arranges to meet contractors in the nearest city/town to the relay. As the relays are located on remote mountaintops, the contractor/vendor should expect an approximately 1-hour drive from the meeting point to the worksite.

Q: Are any permits required on this project for bid and future projects?

A: No permit is required for the first task order as it is a like-for-like HVAC replacement. Future projects may require the contractor/vendor to obtain the appropriate civil permits.

USGS will obtain and manage all site access agreements (i.e. permits to install and operate seismic and radio communications equipment) and all radio frequency allocations (i.e. permits to transmit on licensed frequencies).

Q: Warranty standard 1 year?

A: Any equipment purchased (e.g. HVAC units, generators) shall be subject to the manufacturer’s stated warranty; otherwise, services provided by the contractor/vendor shall be subject to a 1-year warranty unless otherwise specified in a task order/statement of work.

Q: The front sheet requested different labor hours but we won't know what exact trades will be needed until the work comes up. Not sure how we can give labor rates for all trades on this contract year 1-5, when each site looks like it will present its own unique site-specific condition.

A: The revised Pricing Schedule includes all the possible labor categories that are required to perform the tasks outlined in the IDIQ contract Statement of Work.

Offerors may propose one hourly labor rate for each labor category that applies throughout California, without applying locality-specific adjustments at the IDIQ level. The proposed labor rates shall be inclusive of the contractor's anticipated labor costs, fringe benefits, overhead, and profit, as applicable, and should remain applicable throughout the IDIQ ordering period in accordance with the solicitation's pricing requirements.

The contractor shall use the established IDIQ rate table to develop subsequent task order proposals. Wages shall comply with the applicable wage determination and/or prevailing wage requirements for the specific locality where the work is to be performed (Davis-Bacon Act). If travel, mobilization, equipment or other location-dependent costs are applicable, those costs will be incorporated in the firm, fixed price task order proposal and evaluated based on the actual project location and requirements by the USGS Project Officer.

The price evaluation process will be based on: A) IDIQ Labor Rates. The Government will evaluate the offeror's proposed hourly rates for each labor category throughout the IDIQ ordering period. B) Task Order Pricing. Offerors shall submit firm-fixed-price proposals for Task Orders #1 - #5. The Government will evaluate the proposed prices for each task order for price reasonableness.

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Schedule of Items and Prices -- Indefinite Quantity, Indefinite-Delivery Indefinite-Quantity

Ordering Period Year 1 Year 2 Year 3 Year 4 Year 5

1. Electrician (example)-------> $70.00 $70.00 $70.00 $70.00 $70.00

1. Electrician/Generator Technician

2. HVAC Technician

3. Communication Tower Technician (build a new relay or to perform repairs on existing shelters)

3. Certified Tower Climbers

4. Radiofrequency (RF) System

Engineer* (plan/align radio links)

5. Structural Engineer** (do studies on tower loading)

*A Radiofrequency (RF) System Engineer is responsible for:

-Work may be done off-site.

1. Line-of-Sight (LoS) & Terrain Assessment

• Checking Clearance: They analyze geographic data using GIS software to ensure a clear path between antennas.

• Fresnel Zone Analysis: They calculate the Fresnel Zone (the elliptical area around the direct path) to ensure obstructions like trees, hills, or buildings do not block or deflect the radio waves.

• Earth Curvature: For long-distance links, they factor in the curvature of the Earth and atmospheric refraction (using the K-factor) to calculate required tower heights.

2. Link Budget Calculation

• Power Allocation: They mathematically account for every gain and loss in the system to determine if the signal arriving at the receiver is strong enough.

• Gains: They optimize transmitter power, power amplifier gains, and antenna directive gains.

• Losses: They calculate fixed losses from cables, connectors, waveguides, and duplexers, alongside free-space path loss (FSPL).

3. Environmental Mitigation (Rain & Atmospheric Effects)

• Rain Fade: For microwave frequencies (especially above 10 GHz), they use ITU-R models to calculate signal attenuation caused by rain.

• Atmospheric Absorption: They model losses from oxygen and water vapor based on local climate data.

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• Multipath Fading: They predict signal degradation caused by reflections off water or flat ground and plan for space or frequency diversity to counter it.

4. System Reliability & Availability Modeling

• Setting Targets: They design the link to meet strict availability metrics (e.g., "five nines" or 99.999% uptime).

• Fade Margin: They build in a buffer (fade margin)—often 20 to 40 dB—to ensure the link remains stable during heavy storms or atmospheric anomalies.

• Modulation Planning: They configure Adaptive Coding and Modulation (ACM) so the radio can dynamically drop to a lower, more robust modulation scheme during poor weather instead of dropping the link entirely.

5. Interference & Frequency Coordination

• Channel Assignment: They select operating frequencies to avoid co-channel or adjacent-channel interference with neighboring microwave links.

• Regulatory Compliance: They ensure the path complies with FCC or ITU regulations, preparing the necessary technical data for spectrum licensing.

**A Structural Engineer is responsible for:

-Work needs to be done on-site.

1. Code Compliance and Design Standards

• TIA-222 Standard: They design strictly according to the TIA-222 standard (Structural Standard for Antenna Supporting Structures and Antennas), which governs tower design in the United States.

• Risk Categorization: They determine the tower’s Risk Category (I to IV) based on the structural importance and potential hazard to human life or critical infrastructure if it fails.

2. Loading Analysis

• Dead Load: They calculate the permanent weight of the steel structure itself, ladders, platforms, wave-guides, and cables.

• Appurtenance Load: They account for the exact weight and placement of antennas, remote radio heads (RRHs), microwave dishes, and surge arrestors.

• Ice Loading: They factor in the weight of radial ice accumulating on the steel lattice and cables, which drastically increases dead weight and wind resistance in cold climates.

• Live Load: They include temporary weight from maintenance technicians and their gear working on the tower.

3. Wind and Aerodynamic Engineering

• Wind Speed Mapping: They look up the maximum design wind speeds (often ranging from 90 to 140+ mph depending on the county) using historical weather data.

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• Effective Projected Area (EPA): They calculate the EPA of every round and flat surface on the tower to determine how much wind force (drag) the structure will catch.

• Topographic Effects: They apply multipliers if the tower sits on a hill, ridge, or escarpment, which accelerates wind speeds (the "speed-up effect").

• Gust Effect Factors: They model the dynamic, turbulent response of the tower to sudden wind gusts to prevent structural fatigue.

4. Twist, Sway, and Deflection Limits

• Microwave Dish Alignment: Unlike cellular antennas, microwave dishes use highly directional, narrow beams.

• Rigidity Design: Structural engineers must limit the tower's twist (torsion) and sway (deflection) during high winds—often to less than 0.5 to 1 degree—to prevent the microwave links from losing alignment and dropping.

5. Foundation and Geotechnical Engineering

• Geotechnical Review: They analyze soil boring reports to determine soil bearing capacity, cohesion, and groundwater levels.

• Overturning Moments: Because towers are tall and top-heavy under wind load, they design massive concrete foundations (mat foundations, drilled piers, or guy anchors) to resist huge uplifting and overturning forces.

6. Rigging and Construction Safety

• Construction Loads: They specify maximum allowable lift weights for cranes and gin poles during the erection process.

• Temporary Bracing: They design temporary guy wires or bracing to stabilize the tower segments before the structure becomes self-supporting.

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TASK ORDER 2, PART 1

Statement of Work (SOW) for USGS Geyser Peak Microwave Radio Relay

I. Contract Title:

Environmental, Power, and Solar System Inspection, Maintenance, and Repair at the USGS Geyser Peak

Microwave Radio Relay

II. Objectives:

The objectives of this project are to 1) inspect, test, and conduct repairs on the HVAC system, 2) inspect, test, and conduct repairs on the generator power system, and 3) inspect, test, and conduct repairs on the solar power system at one (1) USGS microwave radio telecommunications site.

III. Scope:

A. HVAC System Inspection, Preventative Maintenance, and Power Supply Installation

1. Inspect existing the HVAC system for operational integrity and compliance.

2. Perform annual preventative maintenance on HVAC units.

3. Procure and install a dedicated 240VAC, single-phase power supply for two HVAC units.

4. Ensure that the Asentria SiteBoss 550 is configured to monitor the environmental conditions and

HVAC system status.

B. Generator System Inspection, Preventative Maintenance, and Commissioning

1. Perform annual service on Generator and Automatic Transfer Switch (ATS).

2. Commission generator in accordance with manufacturer requirements, state, and local regulations.

3. Create a comprehensive block diagram depicting AC and DC power distribution to include current flow, voltage in, and voltage out.

4. Integrate generator with DC power plant to charge battery bank using 240VAC from generator

(replacing current 110VAC shore power configuration).

5. Confirm that the DC power plant has charging capability and inverter compatibility with 24VDC, 48VDC, 110VAC, and 240VAC loads while under both generator power and solar power.

6. Validate fuel system integrity and ensure backup power system meets operational standards.

7. Conduct full system integration and operational testing to include ATS operation, solar power and

DC power failover scenarios, and solar and generator power failures.

8. Ensure that the Asentria SiteBoss 550 is configured to monitor the ATS and generator power system status.

C. Solar Power System Inspection and Maintenance

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1. Inspect GE solar power plant for proper installation and operational readiness.

2. Verify that all solar panels are correctly mounted, wired, and connected to the DC power system.

3. Ensure that all components inside and outside of the shelter are grounded in accordance with

Motorola R-56 standards.

4. Test Automatic Transfer Switch (ATS) functionality for switching to solar power during normal and failover conditions.

5. Ensure that the Asentria SiteBoss 550 is configured to monitor the ATS and solar power system status.

D. Contractor Qualifications

1. The Contractor shall hold all applicable national, state, and local licenses.

E. Compliance Requirements

1. The environmental, generator power, and solar power system inspections, maintenance, repairs, and upgrades shall fully comply with all governing authorities, laws, ordinances, regulations, codes, and standards, including, but not limited to:

a. National Codes: ANSI/EIA/TIA 569 – Commercial Building Standard for

Telecommunications Pathways and Spaces.

b. Industry Standards: Motorola R-56 Standards and Guidelines for Communication Sites.

IV. Tools and Materials:

A. The Contractor shall provide all tools, materials, equipment, and labor required to complete the project.

B. The USGS shall provide escorted access to the worksite.

V. Place of Performance:

A. The work shall be performed at the following communications site:

1. Geyser Peak Relay, Sonoma County, CA (38.764697, -122.845189)

VI. Sequence of Work (HVAC System):

A. HVAC System Inspection

1. Site Assessment

a. Review current electrical infrastructure and load capacity.

b. Recommend equipment and infrastructure repairs and/or upgrades to comply with current standards and regulations.

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2. Visual and Functional Inspection

a. Check for physical damage, corrosion, or leaks, and repair as needed.

b. Inspect refrigerant lines, coils, and filters, and repair as needed.

c. Confirm that all metal is grounded in accordance with Motorola R56 standards.

d. Test thermostat and control systems.

3. Performance Testing

a. Measure airflow, temperature differential, and refrigerant pressure.

b. Document operational status and any deficiencies, and repairs.

B. Annual Preventative Maintenance

1. Cleaning

a. Clean condenser and evaporator coils.

b. Replace or clean air filters.

2. Lubrication

a. Lubricate moving parts (fans, motors) per manufacturer specifications.

3. Electrical Checks

a. Inspect wiring, connections, and control boards.

b. Test voltage and amperage draw.

4. System Calibration

a. Verify thermostat accuracy.

b. Adjust refrigerant charge if necessary.

5. Documentation

a. Record maintenance actions and system performance metrics.

C. Power Supply Procurement and Installation

1. Requirements Verification

a. Confirm HVAC units require 240VAC, 1-phase power.

b. Validate load requirements for the two MarvAir HVAC units (model: AVPA48ACA050NU-A5-100).

2. Procurement

a. Source appropriate electrical components (breaker, wiring, conduit, disconnect switch).

b. Ensure compliance with local electrical codes and safety standards.

3. Installation

a. Install a dedicated circuit with over-current protection for each HVAC unit from 240VAC inverter to each HVAC unit.

b. Mount and wire disconnect switch near units.

c. Test voltage and phase integrity.

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4. Inspection and Certification

a. Perform electrical safety checks.

b. Obtain sign-off from certified electrician or inspector.

5. Final Commissioning

a. Power up HVAC units and verify operational performance.

b. Document installation and provide as-built drawings.

VII. Sequence of Work (Generator Power System)

A. Annual Service: Generator and ATS

1. Inspect generator and ATS for physical condition and operational integrity.

2. Perform routine maintenance per manufacturer specifications:

a. Replace filters, fluids, and belts as required.

b. Test electrical connections and control systems.

3. Document service actions and any corrective measures taken.

B. Generator Commissioning:

Generator Make/Model: Generac/SG0045AG035.4V18HPYYC

Alternator Make/Model: Generac/0000243760

1. Prepare generator for commissioning:

a. Verify installation and connections to ATS and DC power plant.

b. Ensure the fuel system is connected and that both tanks contain 80% fuel capacity.

2. Test fuel system for leaks and confirm proper integration with generator and ATS.

3. Coordinate with Generac for manufacturer-approved commissioning procedures:

a. Perform a 4-hour or equivalent load test under per Generac guidance.

b. Create a formal test result report.

C. Power Block Diagram Creation

1. Develop a detailed diagram showing:

a. Generator, ATS, DC power plant, battery bank, and solar integration.

b. Power flow and voltages for both 110VAC and 240VAC configurations.

c. Power flow and voltages for both 24VDC and 48VDC systems to include charging path.

F. Validate diagram accuracy against installed system components.

D. Integration of Generator with DC Power Plant

1. Connect generator output (120VAC) to DC power plant for battery charging.

2. Confirm inverter functionality on both 120VAC generator and 48VDC solar inputs.

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3. Confirm that the HVAC will operate under both generator and solar power.

E. Fuel System Validation

1. Inspect fuel tanks and lines for leaks.

2. Ensure both tanks are filled to 80% capacity.

3. Verify proper fuel delivery to generator during operational tests.

F. ATS and System Failover Testing

1. Simulate solar/DC power outage:

a. Confirm ATS automatically switches to generator power.

2. Perform reverse test:

a. Shut down generator and verify ATS switches back to solar/DC power.

3. Document test results and confirm 100% operational capacity.

VIII. Sequence of Work (Solar Power System)

A. Solar Power Plant Inspection

1. Site Assessment

a. Confirm physical placement and alignment of solar panels.

b. Inspect mounting hardware for structural integrity and compliance with manufacturer specifications.

c. Create tower guy cable anchor and relocate guy to ground.

d. Ensure that all components are grounded in accordance with Motorola R56 standards.

2. Electrical Verification

a. Check wiring connections from panels to combiner boxes and DC power plant.

b. Validate polarity and grounding of all circuits.

c. Inspect conduit and cable routing for compliance with electrical codes.

3. Performance Check

a. Measure voltage and current output from solar array under load conditions.

b. Document system performance and identify any deficiencies.

B. ATS Integration and Testing

1. Functional Test of ATS

a. Simulate normal operating conditions and confirm ATS routes power from solar to DC power plant.

b. Verify ATS indicators and control logic for proper operation.

2. Failover Simulation

a. Simulate power outage scenario and confirm ATS switches to solar power as backup source.

b. Perform reverse test: restore primary power and confirm ATS switches back from solar to primary source.

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3. Documentation

a. Record test results and corrective actions. Confirm 100% operational capacity of ATS with solar integration.

IX. Deliverables:

A. HVAC System

1. Inspection report with findings and required corrective actions and repairs.

2. Preventative maintenance checklist and completion report.

3. Electrical installation certification and compliance documentation.

4. Updated system diagrams and as-built drawings.

B. Generator Power System

1. Annual service report for generator and ATS.

2. Power Block Diagram of integrated system.

3. Cummins commissioning report including 4-hour load test results.

4. Fuel system inspection and leak test documentation.

5. ATS failover test report confirming operational capacity.

6. Inspection report with findings and required corrective actions and repairs.

C. Solar Power Plant

1. Solar power plant inspection report detailing installation and wiring compliance.

2. Electrical verification checklist and performance test results.

3. ATS integration and failover test report confirming operational readiness.

4. Inspection report with findings and required corrective actions and repairs.

X. Completion Criteria:

A. All inspection, maintenance, installation, and commissioning tasks for HVAC, generator, Automatic

Transfer Switch (ATS), and solar systems are completed in accordance with manufacturer specifications and applicable codes.

B. All functional tests, including ATS failover simulations and generator load tests, are successfully performed and documented.

C. Power Block Diagram and as-built drawings accurately reflect the final system configuration, as outlined in

Section VII, paragraph C.

D. All deliverables listed in the Statement of Work are submitted, reviewed, and approved by USGS personnel.

E. Systems demonstrate 100% operational capacity under normal and backup power scenarios.

F. Compliance with national safety standards and local regulations is verified.

G. Remove all debris, trash, tools, and surplus materials from the worksite.

H. Final walkthrough and acceptance sign-off are completed by USGS personnel.

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TASK ORDER 2, PART 2

Statement of Work (SOW) for USGS Geyser Peak Microwave Radio Relay

VII. Contract Title:

Communications Shelter Inspection, Maintenance, and Repair at the USGS Geyser Peak Microwave Radio

Relay

The objective of this project is to inspect the communications shelter and to repair the identified deficiencies to ensure structural integrity, electrical safety, and compliance with Motorola R-56 standards and industry best practices at one (1) USGS microwave radio relay site.

A. Structural Elements: Roof, Ceiling, Floor, Door, and Walls

1. Roof: Inspect for leaks, cracks, and proper sealing. Repair or replace as needed.

2. Ceiling: Check for water damage or other damage to ceiling panels. Repair or replace as needed.

3. Floor: Verify stability and structural integrity. Inspect for molded or damaged floor tiles. Repair or replace as needed.

4. Door: Replace the damaged exterior door. Ensure proper closure, locking mechanisms, and wind/weatherproofing.

5. Walls: Inspect exterior and interior walls for cracks, holes, and moisture intrusion. Repair as needed.

Seal all cable entries, junction plates, and unused ports.

B. Electrical and Grounding

1. Grounding System: Inspect all interior and exterior metal (e.g. junction boxes, utility boxes, vents, conduit, etc.) to confirm proper bonding and grounding. Conduct repairs to ensure that all metal is properly grounded in accordance with Motorola R-56 standards.

2. Electrical Panels: Inspect all panels and outlets to confirm proper labeling and secure connections.

Inspect for corrosion. Repair or replace as needed.

3. Lighting: Inspect interior and exterior lighting to ensure proper illumination. Repair or replace as needed.

C. Safety and Environmental

1. Fire Safety: Inspect all fire extinguishers and smoke detectors. Repair or replace as needed.

D. Contractor Qualifications

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1. The Contractor shall hold all applicable national, state, and local licenses.

E. Compliance Requirements

1. The communications shelter inspections, maintenance, and repairs shall fully comply with all governing authorities, laws, ordinances, regulations, codes, and standards, including, but not limited to:

a. National Codes: ANSI/EIA/TIA 569 – Commercial Building Standard for

Telecommunications Pathways and Spaces.

C. The Contractor shall provide all tools, materials, equipment, and labor required to complete the project.

D. The USGS shall provide escorted access to the worksite.

B. The work shall be performed at the following communications site:

VI. Specific Tasks:

A. Structural Elements

1. Roof

a. Perform a visual inspection for cracks, punctures, and deteriorated sealant around penetrations (e.g.

vents, cable entries). Remove the failed roof membrane and sealant.

b. Check flashing and seams for separation or corrosion.

c. Identify any water pooling or signs of leakage inside the shelter.

d. Apply a new roof membrane and sealant.

i. Ensure that all metal is grounded in accordance with Motorola R-56 standards.

2. Ceiling

a. Inspect ceiling panels for discoloration, sagging, or mold growth indicating water intrusion.

b. Verify that all ceiling-mounted fixtures (e.g. lights, cable trays) are securely fastened.

c. Replace any warped or damaged panels; clean and treat areas affected by moisture.

VIII. Ensure that all metal is grounded in accordance with Motorola R-56 standards.

3. Floor

a. Examine flooring for cracks, loose tiles, or signs of mold and mildew.

b. Check for soft spots that indicate subfloor deterioration.

c. Replace damaged tiles and apply anti-microbial treatment where necessary.

d. Confirm proper drainage and slope to prevent water accumulation.

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e. Ensure that all metal is grounded in accordance with Motorola R-56 standards.

4. Replace Door, Sweep, and Threshold; Install Rain and Drip Guards; Replace Weatherstripping and

Sealant

a. Remove the existing exterior door, threshold, sweeps, rain/drip guards, and all associated hardware.

b. Clean and prepare the opening for new installation.

c. Hang new door with hinges, strike plate, hold-open door closers with anti-slam protection, and handles. Reuse the current lockset. Verify correct swing (i.e. ensure the door won’t hit the building or electrical box), alignment, and smooth operation.

d. Ensure all materials are suitable for maritime environments (e.g., stainless steel, anodized aluminum, UV stable plastics, or fiberglass).

e. Install storm-guard style threshold using stainless steel hardware and Butyl tape or exterior sealant.

f. Install new door sweep and rain/drip guards; ensure proper fit, spacing, and water diversion.

Exterior door sweep shall extend below the face of the threshold.

g. Seal all joints for watertightness; confirm no light or air penetration.

h. Install high-compression TPE weatherstripping around the perimeter; cut to fit for a snug seal.

i. Apply Dow Corning 791 or equivalent sealant to all joints; fill gaps with foam as needed.

j. Apply exterior-grade caulk along trim edges; smooth and allow curing per manufacturer instructions.

k. Ensure that all metal is grounded in accordance with Motorola R-56 standards.

5. Walls

a. Inspect interior and exterior walls for cracks, holes, and corrosion.

b. Seal all cable entry points, junction plates, and unused ports with approved grommets or sealant to maintain RF shielding and to prevent pest intrusion.

c. Repair damaged drywall, FRP, and metal panels. Apply protective coating where needed.

d. Ensure that all metal is grounded in accordance with Motorola R-56 standards.

B. Electrical and Grounding

1. Grounding System

a. Test continuity of all bonding connections using an ohmmeter to confirm compliance with Motorola

R-56 standards.

b. Inspect grounding straps, clamps, and conductors for corrosion or looseness.

c. Re-bond any ungrounded metal components (junction boxes, racks, utility enclosures) and replace corroded hardware.

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2. Electrical Panels

a. Verify that all breakers and circuits are clearly labeled according to site schematics.

b. Inspect for loose terminations, discoloration, or heat damage on bus bars and connectors.

c. Clean corrosion from terminals; replace damaged breakers or panels as required.

3. Lighting

a. Test all interior and exterior fixtures for proper illumination and secure mounting.

b. Replace burned-out bulbs with energy-efficient equivalents; repair faulty wiring or damaged housings.

C. Safety and Environmental

2. Fire Safety

a. Check expiration dates and pressure gauges on all fire extinguishers; recharge or replace units as needed.

b. Test smoke detectors for operational readiness and replace batteries or units that fail testing.

VII. Completion Criteria

4. All work shall be considered complete when the following conditions are met:

1. Shelter Structural Integrity: Roof, ceiling, floor, and walls are free of cracks, leaks, water damage, and structural deficiencies; all cable entries and unused ports are sealed and watertight;

no signs of mold or corrosion remain.

2. Door Replacement: New door operates smoothly with correct swing and alignment; all hardware

(hinges, lockset, strike plate, closer, handles, kick plate) functions properly; weatherstripping, sweeps, threshold, drip guards, and rain guards provide continuous seal and water diversion;

sealant and caulking applied with no gaps or light penetration; materials meet maritime durability standards.

3. Weatherproofing: Perimeter seals, weatherstripping, and caulking ensure airtight and watertight protection.

4. Electrical and Grounding: Grounding system tested for continuity and bonding per Motorola R-

56 standards; electrical panels properly labeled, connections secure, and free of corrosion;

interior and exterior lighting operational, including emergency lighting.

5. Fire Safety: Fire extinguishers charged and within expiration date; smoke detectors tested and functional.

6. Documentation and Approval: All inspection results and corrective actions documented and photographed. Final sign-off obtained from USGS personnel confirming compliance with specifications and standards.

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TASK ORDER 2, PART 3

Scope of Work (SOW) for USGS Geyser Peak Microwave Radio Relay

Radio Room Equipment and Communications Tower Work at the USGS Geyser Peak Microwave Radio Relay

Ensure proper installation, grounding, and alignment of tower components and equipment racks to maintain structural integrity, optimize signal performance, and meet safety and operational standards.

A. Radio Room Infrastructure

1. Assemble four 4-post racks and secure to floor; ground each rack and install ground rail on both sides.

2. Run eight LMR-400 cables with male N at Polyphaser and TNC male 90° connectors at radios.

3. Identify and repair coaxial cable grounding issues (e.g. missing grommets for network cables).

4. Bond ice bridge segments.

5. Run 24 VDC and 48 VDC power to radio racks.

B. Communications Tower

1. Ensure that tower is properly grounded in accordance with Motorola R-56 standards. Repair or replace grounding system as needed.

2. Remove guy wire anchored to solar structure and re-anchor to appropriate location.

3. Remove ice shields from tower.

4. Add and/or relocate antenna mounts, stiff arms, and standoffs.

5. Inspect all coaxial cable grounding, VSWR, bend radius, and cable supports.

6. Verify azimuths, elevation, polarity, and color code of 900 MHz Yagi antennas.

7. Remove unneeded PTP45700 panel. Verify azimuth, elevation, and color code of remaining

PTP45700 panel.

8. Create tower inventory to include all antennas, panels, dishes, and unused mounts by leg, elevation, azimuth, and color code.

C. Contractor Qualifications

1. The Contractor shall hold all applicable national, state, and local licenses.

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D. Compliance Requirements

1. The environmental, generator power, and solar power system inspections, maintenance, repairs, and upgrades shall fully comply with all governing authorities, laws, ordinances, regulations, codes, and standards, including, but not limited to:

a. National Codes: ANSI/EIA/TIA 569 – Commercial Building Standard for

Telecommunications Pathways and Spaces.

b. Industry Standards: Motorola R-56 Standards and Guidelines for Communication

Sites.

E. The Contractor shall provide all tools, materials, equipment, and labor required to complete the project.

F. The USGS shall provide escorted access to the worksite and all azimuths and heights for antenna alignment.

C. The work shall be performed at the following communications site:

A. Radio Room Infrastructure

1. Rack Assembly and Grounding

a. Unpack and inspect all rack components for damage.

b. Assemble four USGS-provided 4-post racks per manufacturer specifications.

c. Position racks with faces toward the wall and battery bank/power plant. Place racks at least 3′ from walls or obstructions; if space is limited, create two equal-width access paths.

d. Secure each rack to the floor using appropriate anchors.

e. Install ground rails on both sides of each rack.

f. Connect each rack to the facility ground system using approved UL grounding conductors in accordance with Motorola R-56 standards.

2. Cable Installation

a. Route eight LMR-400 coaxial cables from designated entry points to radio racks.

b. Terminate cables with male N at Polyphaser and TNC male 90° connectors at radios.

c. Run shielded network cable (Cat5e, or better) from LPU to POE at rack.

d. Color code and label each cable within 6” of Polyphaser and also within 6” of the radio for identification and to verify continuity.

3. Coaxial Grounding Repairs

a. Inspect all PoE and coaxial cable grounding points (top, base, and entrance) for compliance.

b. Replace missing grommets and ensure proper strain relief for network cables.

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c. Confirm all grounding kits are installed and bonded to the ground bus, base of tower, and port of entrance.

d. Test and inspect all cables for bend radius, heat shrink, weather kits, VSWR, and proper support.

4. Ice Bridge Bonding

a. Inspect all ice bridge segments for bonding continuity.

b. Install bonding straps or jumpers between segments as required.

c. Verify electrical continuity across the entire ice bridge structure.

5. Power Distribution

a. Route 24 VDC and 48 VDC power feeds separate from data and coax from the power plant to each radio rack. Each face shall have its own 24 VDC and 48VDC line on independent breakers. Unused lines shall be capped with power lead 1” shorter than the return lead. Leads shall be 8AWG tinned flat duplex wire.

b. Terminate power cables at designated distribution blocks. Label all leads with voltage, circuit breaker number, and rack location at both ends (e.g. 24VDC C/B#1 Rack #1 Front).

c. Test voltage and polarity before energizing equipment.

B. Communications Tower

1. Grounding Verification

a. Inspect tower grounding system for compliance with Motorola R-56 standards.

b. Test ground resistance; repair or replace ground rods, clamps, or conductors as needed.

c. Ensure all tower components are bonded to the ground system.

2. Guy Wire Adjustment

a. Identify guy wire currently anchored to solar structure.

b. Detach and re-anchor guy wire to an approved anchor point per engineering specifications.

c. Tension guy wire to manufacturer-recommended values.

3. Ice Shield Removal

a. Remove existing ice shields from tower legs.

b. Inspect mounting hardware for reuse or disposal.

4. Antenna Mounts and Standoffs

a. Relocate or install antenna mounts and standoffs per design drawings.

b. Ensure proper spacing and alignment for all antennas.

c. Tighten all hardware to torque specifications.

5. Cable Grounding and Support

a. Inspect all coaxial cable runs for proper grounding kits and support brackets.

b. Install missing grounding kits and secure cables to tower using approved hangers.

c. Verify bonding continuity from cables to tower ground system.

6. Azimuth Verification

a. Check orientation of all 900 MHz Yagi antennas against design azimuths.

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b. Adjust antenna alignment as necessary using a calibrated compass or GPS reference.

c. Document final azimuth readings.

VII. Deliverables:

A. Create a written tower inventory (with photographs) to include azimuth, elevation, orientation, color code, and tower leg for all antennas, dishes, panels, and unused mounts.

IX. Completion Criteria:

A. All racks are physically secured, grounded, and meet spacing requirements (3′ clearance or two equal-width paths).

B. Grounding continuity verified for racks, coaxial cables, PoE, ice bridge, and tower components.

C. Power circuits tested and confirmed operational with correct polarity and voltage.

D. Leads labeled (at both ends) with voltage, circuit breaker number, and rack location.

E. Coaxial cables terminated, labeled, and tested for continuity, and VSWR.

F. Tower grounding and signage meet Motorola R-56 standards.

G. Guy wire tension and anchor verified against manufacturer specifications.

H. Antenna azimuths confirmed and recorded in documentation.

I. Work area cleared of debris; all removed hardware either reused or properly disposed.

J. Final inspection completed and signed off by USGS personnel.

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TASK ORDER 3

Statement of Work (SOW) for USGS Carr Hill Microwave Radio Relay

Pour Concrete Slab and Anchor Propane Tank at the USGS Carr Hill Microwave Radio Relay

The objective of this project is to pour a base-isolated and seismically anchored concrete slab for an above-ground liquid propane tank and to anchor the tank to the slab at one (1) USGS radio telecommunications site.

The approximate dimensions for the slab are 5’ L x 12’ W x 6” D. See Appendix A for photos of the worksite and existing LP tank.

A. Construct a seismically resilient concrete slab to support an existing 500 gallon above-ground liquid propane tank.

1. Perform site preparation including excavation, subgrade compaction, and installation of a gravel base.

2. Ensure the installation location is at least 10 feet from any building or source of ignition.

3. Transfer and temporarily store the liquid propane in the tank, if required.

4. Install a reinforced concrete slab approximately 5 feet by 12 feet and 6 inches thick, either poured in place or using a pre‑cast reinforced pad.

5. Ensure the slab is level and reinforced with steel or fiber to enhance strength and seismic performance.

6. Ensure the slab is base-isolated using flexible pads or bearings and seismically anchored using appropriate methods.

7. Install seismic‑rated anchor bolts, brackets, and hold‑downs as needed on the new slab.

8. Securely anchor the existing propane tank to the new anchorage system per manufacturer specifications and applicable standards.

B. Contractor Qualifications

1. The Contractor shall hold all applicable national, state, and local licenses.

C. Compliance Requirements

1. The work performed on this project shall fully comply with all governing authorities, laws, ordinances, regulations, codes, and standards, including, but not limited to:

a. National Codes: ANSI/EIA/TIA 569 – Commercial Building Standard for

Telecommunications Pathways and Spaces.

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G. The Contractor shall provide all tools, materials, equipment, and labor required to complete the project.

H. The USGS shall provide escorted access to the worksite.

D. The work shall be performed at the following communications site:

1. Carr Hill Relay, San Luis Obispo County, CA (35.88813, -120.43051)

VI. Specific Tasks

A. Site Preparation

1. Excavate the designated slab area and remove debris, vegetation, and topsoil.

2. Compact the subgrade to create a stable foundation.

3. Install and compact a gravel base layer to provide drainage and support.

B. Verify Safe Installation Distance

1. Confirm the installation location maintains at least 10 feet of clearance from buildings or ignition sources.

C. Transfer and Temporarily Store Propane (If Required)

1. Safely transfer the liquid propane from the existing tank into approved temporary storage.

2. Follow all applicable LP-gas handling and safety procedures.

D. Install Reinforced Concrete Slab

1. Set formwork for a slab approximately 5 ft × 12 ft × 6 in.

2. Pour reinforced concrete in place or install a pre-cast reinforced pad of equivalent dimensions.

3. Allow concrete to finish and cure properly.

E. Ensure Leveling and Structural Reinforcement

1. Verify that the slab surface is level.

2. Confirm reinforcement steel or fiber is properly embedded to enhance seismic performance.

F. Provide Seismic Base Isolation and Anchorage Provisions

1. Install flexible isolation pads or bearings to reduce seismic force transfer.

2. Integrate required seismic anchorage features into or onto the slab.

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G. Install Seismic-Rated Anchorage Hardware

1. Install anchor bolts, brackets, and hold-downs rated for seismic loading.

2. Ensure proper embedment depth, spacing, and alignment per manufacturer requirements.

H. Anchor the Existing Propane Tank

1. Position the tank on the slab.

2. Securely anchor it to the installed seismic anchorage hardware per manufacturer specifications and applicable standards.

I. Transfer Liquid Propane Back into the Tank

1. Safely refill the tank with liquid propane.

2. Perform all required leak checks and safety verifications.

J. Remove all debris, trash, tools, and surplus materials from the worksite.

VII. Deliverables

A. The contractor shall provide a diagram and/or photographs depicting the dimensions of the slab, the arrangement of the rebar or other reinforcements, and the location of all anchor points.

VIII. Completion Criteria

A. The project is considered complete when:

1. The reinforced concrete slab is installed, level, cured, and built to design specifications with proper seismic reinforcements.

2. Base‑isolation components and seismic anchorage provisions are installed correctly and aligned with tank anchorage points.

3. All seismic‑rated anchor bolts, brackets, and hold‑downs are installed to manufacturer requirements, including correct spacing, alignment, and torque.

4. The propane tank is positioned accurately and securely fastened to the anchorage system without measurable unwanted movement.

5. Propane has been safely transferred back into the tank, followed by successful leak checks, pressure verification, and safety sign‑off.

6. The work area is clean, all debris removed, and all documentation (e.g., installation notes, diagrams, as‑built photos) is complete and submitted.

USGS personnel have conducted a final walkthrough and “signed off” on the work. Appendix A

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Photo 1. Overview of Carr Hill radio telecommunications site.

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Photo 2. Existing 500-gallon liquid propane (LP) tank.

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TASK ORDER 4

Statement of Work (SOW) for USGS Tassajera Creek Radio Relay

Antenna Installation, Transmission Line Upgrade, and Safety Feature Installation at the USGS Tassajera Creek

Radio Relay

The objective of this project is to remove, relocate, and reinstall antennas and transmission lines and to install a climbing safety system and anti-climb panels on the 30’ ROHN 65G communications tower at one (1) USGS radio telecommunications site. See Appendix A for the location of the worksite and Appendix B for photographs of the communications tower and radio communications cabinet.

D. The Contractor shall remove, relocate, and reinstall antennas; install, label, and ground new coax; add a climbing safety cable system and anti‑climb panels; route and label cables inside the radio enclosure; and complete required sweep and line‑loss testing. The Contractor is NOT responsible for installing or configuring the digital radios.

E. Contractor Qualifications

1. The Contractor shall hold all applicable national, state, and local licenses.

F. Compliance Requirements

2. The communications tower work shall fully comply with all governing authorities, laws, ordinances, regulations, codes, and standards, including, but not limited to:

a. National Codes: ANSI/EIA/TIA 569 – Commercial Building Standard for

Telecommunications Pathways and Spaces.

b. Industry Standards: Motorola R-56 Standards and Guidelines for Communication Sites.

c. Los Padres National Forest access and combustion engine (generator) use guidelines.

I. The Contractor shall provide all tools, materials, equipment, and labor required to complete the project.

J. The USGS shall provide escorted access to the worksite.

E. The work shall be performed at the following communications site:

1. Tassajera Creek Relay, Santa Margarita, CA (35.39269, -120.70787)

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a. The worksite is accessible via a semi-maintained dirt road within Los Padres National Forest.

The road may be closed during periods of increased fire risk and/or at the discretion of the

United States Forest Service.

b. The worksite is remote and is exposed to high winds, heat, cold, and fog.

c. AC power and public amenities are NOT available on-site.

d. The USGS battery bank and power system are NOT available for Contractor use. The

Contractor shall supply all power systems required to complete the project. Internal combustion generators must comply with Los Padres National Forest guidelines.

VI. Specific Tasks

A. Communications Tower

1. Remove existing coaxial cables, antennas, and standoffs as required.

2. Reuse current antennas and standoffs unless otherwise directed by the USGS.

3. Relocate and reinstall antennas and standoffs at the USGS‑specified tower locations, aligning each antenna to the required azimuth, elevation, and polarization (Appendix C).

4. Install new coaxial transmission lines from each antenna to the communications cabinet entry port.

Use metal hangers and route the transmission lines up the tower’s centerline to maintain a clear climbing path.

5. Apply UV‑resistant color coding to each antenna and associated coaxial cable within 1 foot of the antenna connection and within 1 foot of the communications cabinet entry port.

6. Ground all coaxial transmission lines at the antenna, the tower base, and the communications cabinet entrance in accordance with Motorola R-56 standards.

7. Install an ANSI Z359.16‑rated climbing cable system on the tower.

8. Install approved anti‑climb panels to prevent unauthorized public access to the tower structure.

B. Radio Enclosure

1. Route coaxial cables through the communications cabinet entry port to the surge protection device

(SPD). Bond and ground the SPD per Motorola R-56 requirements.

2. Label all coaxial cables using the same color-coding scheme applied on the tower. Affix the labels at the entry port and within 1 foot of final radio termination.

3. Install LMR‑400 jumpers from the Polyphaser/SPD to the radios using male Type N connectors at the SPD and straight male TNC connectors at the radios.

4. Perform cable sweep tests and line‑loss measurement tests. Provide documentation of test results to the USGS.

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VII. Deliverables

A. The Contractor shall provide 1) documentation of the cable sweep and line-loss test results, 2) an electronic file depicting the color-coding scheme for each antenna and its associated coaxial cable, and 3) photographs of the climbing safety cable system and the anti-climb panels.

VIII. Completion Criteria

A. The project is considered complete when:

1. All antennas and standoffs have been installed at their USGS-specified locations on the communications tower.

2. All coaxial cables have been installed, tested, and labeled on the communications tower and at the communications equipment cabinet.

3. A climbing safety cable system and anti-climb panels have been installed on the communications tower.

4. The work area is clean, all debris removed, and all documentation (e.g., installation notes, diagrams, as‑built photos) is complete and submitted.

5. USGS personnel have conducted a final walkthrough and “signed off” on the work.

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Appendix A

Map showing the location of Tassajera Creek Relay and the distribution of its radio links.

Figure 1. Tassajera Creek (PTA), 35.39269, -120.70787

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Appendix B

Photo 1. USGS 30’ ROHN 65G communications tower and radio equipment cabinet.

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Photo 2. Tower and radio equipment cabinet.

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Appendix C

Locations on Tower for Antenna Installations

North Leg (Blue)

Color Code Antenna CL (ft) Azimuth (deg) Polarization Antenna Model Site Code

1 Blue 30 390 Vert TY-900 NC.PHC

East Leg (Red)

Color Code Antenna CL (ft) Azimuth (deg) Polarization Antenna Model Site Code

1 Red 30 140 Vert TY-900 NC.PBIB

2 Red 20 165 Vert TY-900 NC.PKYB

3 Red 15 167 Hor TY-900 BK.PABC

West Leg (Green)

Color Code Antenna CL (ft) Azimuth (deg) Polarization Antenna Model Site Code

1 Green 25 294 Vert TY-900 NC.PCB

2 Green 17 291 Hor TY-900 BK.WROK

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TASK ORDER #5, PART 1

Statement of Work (SOW) for USGS HVAC Replacement

HVAC System Replacement at USGS Williams Hill Microwave Radio Relay Site

II. Objective:

To supply, install, and test an HVAC System at one (1) United States Geological Survey (USGS) microwave radio telecommunications site. The Contractor shall prepare a proposal for the project, and upon award, shall perform the supply, installation, and evaluation work.

A. The Contractor shall:

1. Conduct a detailed inspection of the existing HVAC system and match the new HVAC system and HVAC system components for installation at the preexisting location.

2. Determine any required modifications to the mountings, cabling, ducts, vents, electrical connections, and circuit breakers for the new HVAC system and HVAC system components. Contractor shall seek approval from the

USGS and the US Army Corps of Engineers (USACE) for any required changes.

3. Procure and install the new HVAC system, HVAC system components, and control units. Contractor shall ensure that the HVAC system has a full, stand-alone HVAC controller with similar capabilities to the MarvAir

CommStat4. The HVAC controller must be fully capable of interfacing with the Asentria SiteBoss 550 Remote

Site Manager.

4. Program the HVAC system to maintain the specified indoor temperature and humidity levels.

5. Test the new HVAC system to ensure the proper operation of the heating/cooling and ventilation functions.

6. Ensure that all components, ducting, brackets, and metal within the communications shelter and exterior are grounded in compliance with Motorola R-56 and industry best standards.

7. Remove and dispose of the existing HVAC system and HVAC system components. Remove all debris, trash, tools, and surplus materials from the site upon completion of the project.

8. Provide complete documentation to USGS and the US Army Corps of Engineers (USACE) to include schematics/wiring templates and HVAC operations and maintenance manuals.

B. Contractor qualifications include:

1. The Contractor shall have experience with three (3) or more installations of communications shelter HVAC systems of comparable size and complexity. Each of these installations shall have performed satisfactorily for at least one (1) year after final acceptance by the user. Include the names, locations, and points of contact for these installations as a part of the submittal.

2. The Contractor shall hold all applicable national, state, and local licenses.

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C. The installation shall comply fully with all governing authorities, laws, ordinances, regulations, codes, and standards, including, but not limited to:

1. United States Federal Law:

a. Department of Labor, CFR, Title 29, Part 1910, Chapter XVII - Occupational Safety and

Health Administration (OSHA), Occupational Safety and Health Standards

2. National Codes:

a. American National Standards…