Scope_of_Work__Runway_Geotechnical_Investigation_Final.pdf

Statement of Work (SOW)

Project #QYZH 26-0046

Runway Pavement Geotechnical Investigation & Material Failure Analysis

1. Project Overview & Objectives The purpose of this project is to conduct a comprehensive geotechnical and material evaluation of the runway pavement experiencing progressive distress, including surface cracking, spalling, and pitting. The investigation will focus on identifying the root causes of the distress, specifically assessing whether the pavement suffers from material fatigue, aggregate-cement binder bonding failure, or chemical degradation.

The Contractor shall provide all labor, equipment, materials, transportation, and engineering services required to extract approximately 30 concrete core samples from designated locations on the runway, perform specialized laboratory testing, and deliver an engineering evaluation report with rehabilitation recommendations.

We envision coring and lab tests in two consecutive phases:

Ph 1: Core initial samples, about 15 each, on each end of the runway, and conduct lab tests outlined in para. 4.1 below.

Ph 2: We expect Ph 1 lab results to be available within 24 hrs of removing the cores.

The contractor will then be directed to take additional core samples, about 15 each, on each end of the runway and conduct lab tests outlined in para. 4.2 below.

All cores take must be restored the same day with rapid-setting, high-strength concrete per UFGS 32 01 29.61 (see para 3.3 below).

Contractor equipment can remain on base overnight in a laydown area just outside the airfield access gate on Red Fir Ave.

2. Regulatory Compliance & Technical Standards All field operations, laboratory testing, and engineering analyses shall be performed in strict accordance with the latest editions of the following Unified Facilities Criteria (UFC), Unified Facilities Guide Specifications (UFGS), and ASTM International standards:

2.1 UFC Criteria & Guide Specifications

• UFC 3-260-03 (Airfield Pavement Evaluation): Governs airfield pavement evaluation, including the selection of coring locations, field inspection procedures, and physical measurements.

• UFC 3-270-08 (Pavement Management): Standardizes structural evaluation, field data collection, and runway condition assessment protocols.

• UFGS 32 13 11 / UFGS 32 13 14.13 (Concrete Paving for Airfields and Other Heavy Duty Pavements): Outlines construction and material compliance baselines for airfield concrete, aggregate grading, and binder requirements.

• UFGS 32 01 29.61 (Partial Depth Patching of Rigid Paving): Establishes standard specifications for rapid-setting, high-strength concrete patching of core holes to maintain airfield operational safety.

• UFGS 32 01 19.61 (Sealing of Joints in Rigid Pavement): Applies to any joint inspection or sealing work conducted during or immediately following coring operations.

2.2 ASTM Testing Standards

• ASTM C42 / C42M: Standard Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete (field extraction and compressive strength testing).

• ASTM C496 / C496M: Standard Test Method for Splitting Tensile Strength of Cylindrical Concrete Specimens.

• ASTM C856: Standard Practice for Petrographic Examination of Hardened Concrete (microscopic analysis of binder-aggregate interface).

• ASTM C642: Standard Test Method for Density, Absorption, and Voids in Hardened Concrete.

• ASTM C457 / C457M: Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete (freeze-thaw durability assessment).

• ASTM C1260 / ASTM C1567: Standard Test Method for Potential Alkali-Silica Reactivity of Aggregates (to rule out chemical degradation/pitting mechanisms).

3. Field Investigation & Coring Operations

3.1 Operations & Site Logistics

• Airfield Operations Coordination: All field work must be coordinated with Airfield Management/Airport Operations. Due to active runway operations, work is restricted to off-peak night shifts as designated by Airfield Operations.

• Safety & Security: The Contractor shall comply with all local security requirements, including airfield security badging (SIDA zone rules) and escort protocols. All vehicles and equipment must be outfitted with FAA-compliant safety flags and warning lights.

• FOD Prevention: The Contractor shall maintain strict control over debris, dust, and slurry. All coring operations must utilize vacuum recovery systems to capture slurry. The runway must be swept and verified as 100% free of Foreign Object Debris (FOD) prior to reopening at the end of each shift.

3.2 Coring Procedures

• The Contractor shall extract 30 concrete core samples at locations designated by the pavement engineer.

• Cores shall be drilled utilizing a trailer- or truck-mounted rotary diamond-tipped core drill rig in accordance with UFC 3-260-03 and ASTM C42.

• Core diameters shall be 6 inches to ensure structural integrity for testing. Cores must be drilled to the full depth of the rigid pavement slab (estimated to be between 16 and 18 inches).

• Each core shall be logged immediately upon extraction, documenting:

Unique Core ID and GPS location coordinate.

• Exact length, diameter, and physical condition (integrity, micro-cracks, void presence).

• Photographs of the core in-situ, immediately after extraction, and alongside its core hole.

3.3 Core Hole Restoration

• Immediately following extraction, core holes must be prepared and patched in accordance with UFGS 32 01 29.61.

• The patching material must be an approved high-strength, rapid-setting, non-shrink concrete grout capable of reaching a minimum compressive strength of 3,000 psi within 2 hours of placement.

• The patch must be consolidated and finished flush with the surrounding runway surface to prevent tire hazards or water ponding.

4. Laboratory Testing To identify both the physical strength and the micro-structural causes of spalling, pitting, and binder-aggregate debonding, a tiered testing protocol shall be implemented.

4.1 Base Structural Testing (All 30 Cores)

1. Compressive Strength (ASTM C42 / C42M): Sawcut the PCC core to test the remaining top 3 to 5 inches of each 16-18 inch core to determine the structural durability of the concrete slab surface and identify any localized areas of sub-standard strength.

2. Flexural Strength (ASTM C496): Sawcut the PCC core to test the remaining bottom 12 inches of each 16-18 inch core to determine the splitting tensile strength and corresponding flexural strength of the concrete slab. Identify any localized areas of sub-standard strength.

4.2 Advanced Petrographic & Durability Analysis (10 Core Subset)

Based on the condition of the cores retrieved and the Section 4.1 test results, an additional 10 cores may be required in Phase 2 to further assess the causes and severity of material related distresses such as ASR and D-Cracking. Each of these cores may undergo advanced testing that will include 1 or more of the following laboratory tests:

3. Density, Absorption, and Voids (ASTM C642): Assess the permeable pore space and moisture absorption rates to identify susceptibility to weathering and freeze-thaw degradation.

4. Petrographic Examination (ASTM C856): Complete a comprehensive microscopic analysis to:

• Evaluate the bonding quality between the cement paste/binder and the course/fine aggregates.

• Identify micro-cracking networks, secondary mineral deposits, and paste carbonation.

• Identify aggregate mineralogy and any signs of physical breakdown (pitting).

5. Air-Void System Analysis (ASTM C457): Measure parameters of the air-void system (spacing factor, specific surface, and air content) to evaluate the freeze-thaw resistance of the concrete mix design.

6. Alkali-Silica Reactivity (ASR) Assessment (ASTM C1260 / C1567): Screen the concrete and aggregates for expansion potential and gel formations to confirm or rule out chemical reactivity as a primary contributor to surface pitting and cracking.

7. Precision Carbonation Depth & pH Mapping (BS EN 14630/RILEM CPC- 18R1): Integrate carbonation depth testing and pH mapping with item 3. Above, Petrographic Exam.

5. Engineering Evaluation & Reporting The Contractor shall perform a professional engineering analysis of all field and laboratory data and compile a comprehensive engineering report. The report must include:

• Executive Summary: A high-level overview of findings and the overall structural health of the runway.

• Draft and Final Report: Provide a draft report with a “Teams” meeting to discuss the report and resolve any questions. Submit a final report that clarifies and addresses any questions raised in the draft stage.

• Field Operations & Core Log Map: Complete layout map (CAD/GIS format) showing all 50 core locations linked to core logs and photographs.

• Laboratory Testing Results: Consolidated, certified laboratory data sheets for all tests (ASTM C42, C496, C642, C856, C457, and C1260).

• Root-Cause Failure Analysis: An engineering synthesis diagnosing cracking, spalling, and pitting.

• The analysis must explicitly address:

Whether failure is driven by cyclic load fatigue or aggregate-binder bonding deficiencies.

• The role of chemical reactions (such as ASR) or freeze-thaw damage.

• Rehabilitation & Repair Recommendations: actionable recommendations for repair (such as partial-depth patching under UFGS 32 01 29.61, joint resealing under UFGS 32 01 19.61, or full slab replacement) tailored to the distress mechanism identified.

6. General Requirements

6.1. Work shall include furnishing all materials, labor, plant, tools, equipment, transportation, supervision, management, and other services (including engineering/technical design support), items and incidentals necessary to complete this project.

6.2. Any estimated quantities provided in project documents are considered informational only. The Contractor must validate quantities and all features of work necessary to deliver a complete and functional project.

6.3. The Contractor shall thoroughly review the project request for constructability and advise the Government of possible problem areas prior to submitting a proposal.

6.4. It is the Contractor’s responsibility to field verify all Government provided record drawings prior to submitting a proposal. The Contractor may make multiple site visits to verify measurements and work quantities. The Contractor is responsible for the accuracy of all measurements whether they are obtained in the field, or as existing drawing take-offs to develop accurate working drawings. All plans, labor, equipment, materials, and incidentals shall be furnished by the Contractor, unless otherwise specified.

6.5. The Contractor shall submit for approval all work schedules to the Government two weeks before start of work, unless otherwise specified. This shall be accomplished on and in accordance with instructions pertaining to AF Form 3064, Contract Progress Schedule, and AF Form 3065, Contract Progress Report.

6.6. Utilities: Subject to available supply, the Government will furnish reasonable amounts of electricity, gas, water and sanitary sewer from existing outlets and supplies, without charge to the Contractor. The Contractor shall conserve utilities. The Government, at their discretion, can charge the Contractor for utilities if the Contractor is using poor conservation practices. The Contractor shall install, maintain and remove any temporary connections and distribution lines at their own expense. If temporary lines are associated with this project, they shall be removed prior to the final acceptance meeting. Communications access may not be available to the Contractor and the Contractor may be required to use wireless communications.

6.7. The Contractor shall secure all supplies and equipment stored on the project site to discourage theft or damage. Contractor shall maintain the project site in a clean, safe and orderly manner. Protection and security for materials and equipment on site is the sole responsibility of the Contractor.

6.8. The work site is in an active airfield and restricted and/or controlled area, the Contractor may experience delays due to compliance with entrance/exit requirements of the restricted/controlled areas. The Contractor shall not be compensated for reasonable delays in accessing these restricted/controlled areas. The Contractor may also be requested to leave a restricted or controlled area at any time. The Contractor shall not be compensated for reasonable delays due to these security measures. The Contracting Officer may extend the contract period of performance when there is a change in security designations that limit or diminish Contractor access to a work site after commencement of the project. The Contracting Officer may also extend the period of performance of this project to offset undue delays, singular or cumulative, due to Contractor's compliance with security restrictions.

6.9. Should the contractor wish to use water for equipment, water will be available from the Government at no charge at a hydrant located at the base of the water tower.

6.10 The Contractor is responsible for equipment and labor for delivery of water from the water source to the job site.

6.11 Wastewater and Solid Waste Disposal for rubber/paint removal operations must comply with Specification 01 57 19 Temporary Environmental Controls.

6.12 No construction wastewater shall be discharged to the ground or storm sewer.

6.13 Wastewater generated from core drilling operations shall be collected and disposed into a sanitary sewer location on base as designated by the Project Manager and/or Quality Control Manager, at no cost to the Contractor.

6.14 All solid debris collected drilling operations shall be disposed of in a permitted sanitary landfill that will accept the waste in accordance with all applicable environmental regulatory requirements.

6.15 The Contractor shall provide and maintain portable toilet facilities at the site for the use of contractor and subcontractor personnel, as required by the EM 385-1-1. The units shall be emptied and cleaned at least once a week, or more often if required by the contracting officer. The doors to the unit shall be self-closing.

7. Construction Requirements

7.1 Progress Reports: The Contractor shall provide weekly progress reports to the

Contracting Officer, Project Manager and Project Inspector. Progress reports must include the work completed each week and quantities of work accomplished as applicable. The report must also provide work planned and scheduled for the subsequent week and callout any coordination requirements needed.

7.2 Submittals: Submittal Register is provided within the Design Specifications. The Contractor shall submit to the Contracting Officer for review and approval the following information: Manufacturer's product brochures and catalog data for all equipment, components and materials to be used and installed. All material Submittals shall be original vendor information (not copies).

7.3 Pre-Final and Final Inspections:

7.3.1 The Contractor shall request from the Contracting Officer a final acceptance meeting. The request shall be in writing (email is sufficient) at least three (3) working days prior to the meeting.

7.3.2 Meeting will be chaired by the Contracting Officer and attended by appropriate Government and Contractor personnel. It is mandatory that the Contractors Project Manager and/or Superintendent be in attendance.

7.3.3 If any Contractor personnel are still working on the project, the Contracting Officer will immediately cancel the final acceptance meeting and direct the Contractor to reschedule when the work is complete.

7.3.4 If during the final acceptance meeting it becomes obvious to the Contracting Officer that the project is not ready for final acceptance, the Contracting Officer will immediately cancel the final acceptance meeting and direct the Contractor to reschedule when the work is complete.

7.3.5 The Contractor will generate a punch list of deficiencies that must be completed prior to the Government taking beneficial occupancy of the facility. During the final acceptance meeting, the Contracting Officer will ask the Contractor how much time he/she needs to correct the deficiencies and both parties will come to an agreement on the number of days to correct the deficiencies. The Government will schedule a meeting to verify if the deficiencies are corrected.

8. Safety Requirements

8.1 In order to provide safety controls for protection to the life and health of employees and other persons, for prevention of damage to property, materials, supplies, and equipment, and for avoidance of work interruptions in the performance of this contract, the Contractor shall comply with all pertinent provisions of the U.S. Army Corps of Engineers Manual, EM 385-1-1, entitled “Safety and Health Requirements Manual,” as most recently amended at time of notice to proceed (NTP). The Contractor shall also take or cause to be taken such additional measures as the Contracting Officer may determine to be reasonably necessary for the purpose.

8.2 The Contractor shall comply with OSHA General Industry Safety and Health Standards (29 CFR 1910), Publication V2206 and OSHA Construction Industry Standards (29 CFR 1926).

8.3 The Contractor shall maintain an accurate record of and report the following:

exposure data and all accidents resulting in death, traumatic injury, occupational disease, and damage to property, materials, supplies, and equipment incidental to the work performed under this contract. The Contractor shall submit records to the Contracting Officer in the manner and on the forms prescribed by the Contracting Officer.

8.4 The Contracting Officer will notify the Contractor of any noncompliance with the foregoing provisions and the action to be taken. The Contractor shall, after receipt of such notice, immediately take corrective action. Such notice, when delivered to the site of the work, shall be deemed sufficient for this purpose. If the Contractor fails or refuses to comply promptly, the Contracting Officer may issue an order stopping all or part of the work until satisfactory corrective action has been taken. No part of the time lost due to any such stop orders shall be made the subject of a claim for extension of time or for excess costs or damages by the Contractor.

8.5 The Contractor shall be responsible for the safety and health compliance of all subcontractors.

8.6 No Fewer than five (5) working days prior to the requirement for welding, gas cutting or brazing, the Contractor shall request a signed AF Form 592, USAF Welding, Cutting, or Brazing Permit from the MHAFB Fire Department, Fire Prevention Section.

9. Environmental Requirements

9.1 Comply with Mt Home AFB Temporary Environmental Measures Specification

01 57 19, provided in the specifications of this contract.

9.2 Disposal of Waste:

a. All construction debris will be taken off base to a state-approved landfill.

b. All trucks containing loose debris shall ensure that upon leaving the site, the debris is loaded in such a manner that shall prevent dropping of materials on streets and conform to local ordinances/laws. Fasten suitable cover, such as a tarpaulin, over the load before entering surrounding streets. The Contractor shall be responsible for cleaning up any materials that fall from trucks and be held liable for any resulting damages. NOTE:

Idaho Waste Systems (IWS) will no longer accept ANY liquid wastes from Mountain Home AFB.

c. The Contractor shall submit all trip tickets from the landfill facility to show all debris is being disposed of in an approved landfill and in accordance with all Federal and State requirements.

d. To the extent practicable, all scrap metal, cardboard, wood pallets and #1- 2 plastic must be sent for reuse or recycling and will not be disposed of in a landfill. Recyclable materials may be dropped off at the base Recycling Center or when coordinated in advance, the Recycling Center may assist with material pick-up.

9.3 Hazardous Material Usage: HAZMAT includes all items that are covered under the Emergency Planning and Community Right-to-Know Act (EPCRA), or defined by Fed Std 313, Paragraph 3.2, or other applicable federal or state reporting requirements; covered under the OSHA HAZCOM Standard (29 CFR 1910.1200) or the OSHA Occupational Exposure to Hazardous Chemicals in Laboratories Standard (29 CFR 1910.1450); and Class I or Class II ozone-depleting substances (ODS). All chemicals utilized in this project must be submitted for HWPM review utilizing the MHAFB Contractors Hazardous Materials Reporting Form (SOW Atch 3). A Safety Data Sheet (SDS) must accompany each product listed on the MHAFB hazardous material authorization, additional information may be required upon request. No hazardous materials are to be brought onto MHAFB without receiving approval. At the end of each calendar month the Contractor must submit any changes to the quantity of hazardous materials stored on site, this includes materials that have been used or identified for disposal via MHAFB Hazardous Materials Monthly Usage Log (SOW Atch 4). All hazardous waste to be shipped off site for disposal must be authorized and coordinated with the MHAFB HWPM.

10. Security Requirements and Base Access The security requirements set forth in this section represent the minimum acceptable security standards for this project. The security requirements set forth in this section are intended to supplement the contract, other specifications and other security standards applicable to the Contractor. Nothing in this section is intended to supersede the contract, other specifications or other security standards applicable to the Contractor. Any questions concerning the purpose and scope of this section or any perceived conflicts between this section and other contract documents and security standards should be immediately brought to the attention of the USG Contracting Officer (KO) and USG Project Manager.

All workers shall be subject to the base rules of entry and exit and subject to search at any time.

10.1 The Contractor shall cooperate fully in all security matters, which may arise relating to this contract and/or base activities.

10.2 It is prohibited to carry or bring weapons on the site without prior USG approval. If approval is granted, personnel will abide by Base policies for authorized use.

10.3 Cell phones are authorized on the site.

10.4 The Contractor shall submit all project SFS Form 30s to the KO (Sponsor) for processing to the VCC prior to the two-week lead time. No consideration shall be given to the Contractor for delays or cost increases experienced due to failing to request base access in a timely manner, nor due to the denial of base access to a contractor or subcontractor employee following the Government-performed background check.

10.5 Base access under this contract shall adhere to the most current entry protocols found at https://www.mountainhome.af.mil/Base-Resources- Helping-Agencies/Visitors-Control-Center/

10.6 All the aforementioned security procedures are strictly enforced.

Inappropriate action and/or violations may result in the immediate termination and removal of said individual and/or Contractor from the base.

https://www.mountainhome.af.mil/Base-Resources-Helping-Agencies/Visitors-Control-Center/ https://www.mountainhome.af.mil/Base-Resources-Helping-Agencies/Visitors-Control-Center/

10.7 The Contractor is required to adhere to all airfield access and driving requirements.

a. Contractor personnel shall be allowed access into the Controlled Area and/or Restricted Area of the flight line after gaining approval of the Entry Authority List (EAL). This EAL is for Airfield access only and is separate from the SF-30 Base Access required to access Mountain Home AFB. The EAL cannot be processed until the SF-30’s are approved. The EAL can take up to 10 calendar days to process. Plan accordingly.

b. Personnel driving in the Controlled Area must attend an Airfield Driver Training Course in Base Operations. The course takes 30-45 mins and can be scheduled for the same day as work is scheduled to begin.

c. Flightline vehicle passes must also be obtained for each vehicle and displayed in the vehicle prior to entering the Controlled Area. Vehicle passes may also be obtained after airfield driver training in Base Operations.

d. The Contractor must always have the approved EAL available while in the Controlled and/or Restricted Areas.

11. Personnel

11.1 The Contractor shall employ sufficient management and contract administration resources, including personnel responsible for project management, field superintendence, change order administration, estimating, coordination, inspection, and quality control, to ensure proper execution and timely completion of work.

11.2 The Contractor shall designate a principal of the firm or other senior management official to provide executive oversight and problem resolution resources to projects for the life of the contract.

11.3 The Contractor shall employ and require its subcontractors to employ only qualified personnel to perform work required for each project.

11.4 The Government reserves the right to exclude, or remove from the worksite, any personnel for reasons of incompetence, carelessness, or insubordination, who violate rules and regulations concerning conduct on federal property, or whose continued employment on the worksite is otherwise deemed by the Government to be contrary to the public interest.

11.5 Under this Contract, the contractor may “dual-hat” the positions of Superintendent, Safety, and Quality Control manager.

11.6 The Contractor shall ensure their designee meets or exceeds the required qualifications of each role for which they are designated. Prior to construction, the Contractor shall provide the CO with written designation for each role, proof of qualifications for each designee, and work contact information (desk/mobile phone, email).

a. Superintendent: The project superintendent must be an individual with a minimum of 10 year’s experience in construction with at least 5 of those years as a superintendent on projects similar in size and complexity. The individual must be familiar with the requirements of EM 385-1-1and have experience in the areas of hazard identification and safety compliance. The individual must be capable of interpreting the schedule and construction drawings. If the superintendent is permitted to also serve as the Quality Control (QC) Manager, the superintendent must also possess those qualifications.

b. Quality Control Manager (QCM): The QC Manager must be an individual with a minimum of 5 years combined experience in the following positions: Project Superintendent, QC Manager, Project Manager, Project Engineer or Construction Manager on similar size and type construction contracts which included the major trades that are part of this contract. The individual must have at least 2 years experience as a QC Manager. The individual must be familiar with the requirements of EM 385-1-1and have experience in the areas of hazard identification, safety compliance, and sustainability.

c. Site Safety and Health Officer (SSHO): All SSHOs will have met the training and experience requirements in EM 3851-1 and this contract.

12. Contractor Laydown and Facilities

12.1 Construction Facilities and Temporary Controls: No equipment or materials are authorized to be stored on the airfield. If the Contractor chooses to have storage or facilities on MHAFB, the Government will provide a laydown lot within a reasonable distance of utilities. The Contractor shall restore the land to its original condition within thirty (30) days of contract completion.

An approved staging area will be provided at a location designated by the Project Manager and/or Quality Assurance Manager. Typically for airfield work, the staging area is off Red Fir Rd. near the access point to the airfield.

If the Contractor chooses to have temporary facilities at MHAFB, the Contractor shall be responsible for any costs associated with their facilities to include mobilization, demobilization, trailers, skirting, utility lines, connections and site restoration. Contractor temporary facilities shall be located within the 50’ x 100’ lot provided on MHAFB. The facilities must conform to MHAFB’s color scheme, architecture standard and be in good repair. Contractor on-site offices shall comply with handicapped accessibility laws and regulations. See General Requirements for utilities availability.

13. Project Closeout

13.1 Contractor shall request from the CO a final acceptance meeting. The request shall be in writing (email is sufficient) at least three (3) working days prior to the meeting.

13.2 Meeting will be chaired by the CO and attended by appropriate Government and Contractor personnel. It is mandatory the Contractors Project Superintendent be in attendance.

13.3 If during the final acceptance meeting it becomes obvious to the CO that the TO is not ready for final acceptance, the CO will immediately cancel the final acceptance meeting and direct the Contractor to reschedule when the work is complete.

13.4 The Government will generate a punch list of deficiencies that the Contractor must complete prior to the Government taking beneficial occupancy of the facility. During the final acceptance meeting, the CO will ask the Contractor how much time he/she needs to correct the deficiencies and both parties will come to an agreement on the number of days to correct the deficiencies. The Government will schedule a meeting to verify the deficiencies are corrected.

POINTS OF CONTACT

Contracting Officer (KO): Caleb Ferch Caleb.Ferch.1@us.af.mil Project Manager (PM): James A. Byron james.byron.3.ctr@us.af.mil Construction Inspector (CI): Mr. Jerry Ledford jerry.ledford.1@us.af.mil

Attachments

1. Airfield Maps/Drawings

2. Specifications

3. Price Schedule