NEC - Warehouse Parking Lot US Embassy Panama City

Statement of Work NEC - Warehouse Parking Lot

Post Location: United States Embassy, Panama City, Panamá

Address: AVE. Basilio Demetrio Lakas

Clayton

Prepared By: The US Department of State

MGT/FAC

Preparation Date:

July 2026.

STATEMENT OF WORK (SOW)

Project Concrete Parking Lot Construction – WAREHOUSE / NEC Compound

Location U.S. Embassy Panama City, Panama Clayton, Panama

Prepared By:

FAC / MGT – U.S. Department of State

Estimated Start Date:

TBD

PART ONE – GENERAL

1. Summary The Facility Management Office (FAC) has determined the need for construction of a structurally engineered reinforced concrete parking lot to improve vehicle accommodation, circulation, and operational safety within the Embassy compound.

The location of this project will be behind the Embassy Compound Warehouse, an existing gravel path will be turned into concrete parking lot for government FAC vehicles. The new parking lot will consist of 14 parking spaces and a turnover of the same concrete structure as the existing roads and parking lot in the Embassy compound. The new parking lot addition will provide the best solution for the shortage of parking spaces in the Embassy, creating more parking available in the GOV lot and less traffic congestion.

The existing area consists of existing soil that does not provide adequate structural support for vehicular loading and is susceptible to moisture infiltration, settlement, and operational safety risks during Embassy operations and heavy rainfall events.

This Statement of Work (SOW) includes the technical requirements for:

• earthworks

• subgrade stabilization

• aggregate base installation

• Portland cement concrete pavement construction

• drainage improvements

• pavement marking

• traffic control elements

All work shall comply with OBO 2025 Code Standards U.S. Government standards, AASHTO, ASTM, ACI, and applicable local codes.

2. Project Description

The Contractor shall furnish all labor, materials, equipment, testing, supervision, and documentation necessary to construct a new reinforced concrete parking lot, including but not limited to:

• Clearing and grubbing of vegetation and organic soils

• Excavation and grading to design elevations

• Subgrade proof rolling and stabilization

• Installation of geotextile separator and/or geogrid reinforcement where required

• Crushed aggregate base course placement and compaction

• Portland cement concrete pavement construction

• Concrete curbs, wheel stops, sidewalks, and ADA ramps

• Storm drainage structures and piping

• Pavement markings and MUTCD-compliant signage

• Final cleanup, restoration, and documentation

3. Government Furnished Material (GFM) All materials, equipment, tools, transportation, testing, and labor required for completion of the project shall be provided by the Contractor unless otherwise specified by the Government.

4. Project Requirements

Coordination The Contractor shall coordinate all work activities with the Contracting Officer’s Representative

(COR).

Construction Documents The Contractor shall maintain a copy of this SOW on site at all times.

All work shall be coordinated with the COR to ensure minimal disruption to Embassy operations and to follow security requirements.

Site Access Access, staging areas, and material storage shall comply with Embassy security requirements and must be approved by the COR.

Meetings The Contractor shall conduct periodic coordination meetings with the COR to review progress, quality control, and technical issues.

Applicable Codes, Standards, and References

All work shall comply with the latest editions of the following standards unless otherwise directed by the COR:

U.S. Government Standards

• U.S. Department of State OBO Facilities Standards 2025

• OBO Design Guides 2025

AASHTO

• AASHTO Guide for Design of Pavement Structures

• AASHTO M147 – Aggregate Base Materials

ASTM

• ASTM D698 / D1557 – Soil Compaction Tests

• ASTM D6938 – In-place Density Testing

• ASTM D4751 – Geotextile Testing

• ASTM C31 – Concrete Cylinder Preparation

• ASTM C39 – Compressive Strength Testing

• ASTM C143 – Slump Test

• ASTM C231 – Air Content Testing

• ASTM C138 – Unit Weight of Concrete ACI (American Concrete Institute)

• ACI 318 – Structural Concrete

• ACI 330 – Design and Construction of Concrete Parking Lots

• ACI 301 – Concrete Specifications

• ACI 308 – Concrete Curing Additional Standards

• FHWA / MUTCD – Traffic Control Devices

• OSHA Safety Regulations

• USACE EM 385-1-1 Safety and Health Requirements Manual

5. Substitutions and Product Options Requests for substitutions shall be submitted in writing at least two (2) weeks prior to proposal submission.

The Contractor must demonstrate that any proposed substitution is technically equivalent or superior to the specified materials.

6. Quality Control and Testing The Contractor shall provide a Quality Control Plan including laboratory and field testing for the following:

Soil Testing

• Soil classification

• Proctor testing (ASTM D698 / D1557)

• Field density verification (ASTM D6938)

Aggregate Testing

• Gradation analysis

• Moisture content testing

• Compaction verification

Concrete Testing

• Slump test (ASTM C143)

• Air content (ASTM C231)

• Unit weight (ASTM C138)

• Compressive strength cylinders (ASTM C39)

Minimum testing frequency:

• One set of cylinders per 50 m³ of concrete placed The Contractor shall submit a Bill of Materials (BOM) including estimated quantities at approximately 80% design completion.

7. Life Safety Protection All work shall comply with OSHA regulations and EM 385-1-1 safety requirements.

The Contractor shall develop and submit:

• Accident Prevention Plan (APP)

• Activity Hazard Analysis (AHA)

• Job Hazard Analysis (JHA)

The Contractor shall also implement a traffic control and pedestrian safety plan in accordance with MUTCD.

Minimum PPE requirements include:

• hard hats

• safety boots

• high-visibility vests

• eye protection

• hearing protection where applicable

Construction debris shall be removed daily.

Temporary storage of debris shall not exceed 48 hours.

PART TWO – EXECUTION

8. Site Preparation and Earthworks

8.1 Clearing and Grubbing

Remove vegetation, organic materials, roots, and debris.

Topsoil shall be stripped to a depth of:

150–300 mm (6–12 inches) Unsuitable material shall be disposed of off-site in accordance with environmental regulations.

SEE DETAILS IN DRAWING PLAN

8.2 Excavation and Grading

Excavate to the required subgrade elevation allowing for pavement structure thickness.

Grading shall provide:

• minimum 2% cross slope

• minimum 1% longitudinal slope to ensure proper drainage.

8.3 Proof Rolling and Subgrade Acceptance

Subgrade shall be proof-rolled using a loaded dump truck or pneumatic roller.

Areas showing:

• rutting

• pumping

• excessive deflection shall be excavated and replaced with engineered fill.

Final subgrade acceptance shall be approved by the COR.

9. Subgrade Preparation and Soil Compaction

9.1 Compaction Requirements

Subgrade shall be compacted to:

95% Modified Proctor Density (ASTM D1557) Moisture content shall remain within:

±2% of optimum moisture content.

9.2 Soil Stabilization

If subgrade soils exhibit:

• CBR < 5

• PI > 20

• high moisture content stabilization shall be performed using:

• lime

• cement

• geogrid reinforcement

9.3 Geotextile Separator Layer

A nonwoven geotextile shall be installed between subgrade and base where required.

Minimum overlap:

300 mm (12 in)

10. Aggregate Base Course

10.1 Material Requirements

Crushed aggregate base shall conform to AASHTO M147.

Maximum aggregate size:

25–37.5 mm (1–1.5 inches)

10.2 Placement and Compaction

Aggregate shall be placed in lifts not exceeding:

150 mm (6 inches) Each lift shall be compacted to:

98% Modified Proctor density

10.3 Thickness Requirements

Typical base thickness:

• 6 in (150 mm) – light vehicles

Final thickness shall be determined based on geotechnical conditions.

SEE DETAIL SECTION IN THE DRAWINGS FOR SUBGRADING SPECIFICATION.

11. Portland Cement Concrete Pavement

11.1 Concrete Mix Design

Concrete shall have the following minimum properties:

Compressive strength: 5,000 psi Maximum water-cement ratio: 0.45 Slump:

3–4 inches (75–100 mm) Air content:

4–6% Maximum aggregate size:

3/4 inch (19 mm) Mix design shall comply with ACI 301 and ASTM standards.

11.2 Pavement Thickness

Concrete pavement thickness shall be:

• 6 in (150 mm) – light vehicles

11.3 Reinforcement

Concrete slabs shall include crack control reinforcement using one of the following systems:

Option B Fiber Reinforced Concrete (FLEXION) 3–5 kg/m³ synthetic fibers

11.4 Jointing Requirements

Contraction Joints Spacing:

12–15 ft (3.5–4.5 m) Saw cut depth:

¼ slab thickness

Saw cutting shall occur within 6–12 hours after finishing.

Expansion Joints Installed where pavement contacts:

• buildings

• curbs

• drainage structures Expansion material shall comply with ASTM D1751.

Joint Sealant Sealants shall comply with ASTM D5893.

11.5 Concrete Placement

Concrete shall be placed using mechanical equipment and properly consolidated using vibrators.

Surface finish shall consist of a light broom finish to provide skid resistance.

Surface tolerance:

6 mm deviation under a 3 m straightedge Ponding shall not be permitted.

11.6 Concrete Curing

Concrete shall be cured in accordance with ACI 308.

Acceptable curing methods include:

• curing compound

• wet curing blankets

• continuous water curing Minimum curing time:

7 days Traffic shall not be permitted for 7 days minimum.

12. Storm Drainage Works Install trench drains, catch basins, and piping systems.

Drainage structures shall be H-20 traffic rated.

Piping shall be:

HDPE or PVC Minimum diameter:

200 mm (8 inches) Drainage shall be designed for a minimum 10-year storm event.

13. Concrete Works Provide:

• concrete curbs

• wheel stops

• sidewalks

• ADA ramps Concrete strength:

4,000 psi Reinforcement shall comply with ACI 318.

14. Pavement Markings and Signage Apply thermoplastic or epoxy pavement markings in accordance with MUTCD.

Provide:

• ADA markings

• directional arrows

• stop bars

• reserved parking markings Install reflective signage mounted on galvanized posts.

15. Restoration The contractor shall restore any existing green/landscaper area to original conditions, if they are affected by any new construction.

16. Schedule

15. Restoration

PART THREE – TECHNICAL APPENDICES

Appendix A – Inspection Hold Points

• Subgrade acceptance

• Base course acceptance

• Reinforcement inspection

• Concrete placement inspection

• Concrete strength testing

• Final inspection

Appendix B – Deliverables The Contractor shall submit:

• Shop drawings

• Pavement section details

• Quality control reports

• As-built drawings

• Warranty documentation