A.02.17_ar167_Att 1 SOW_011010.pdf

US Army Corps of Engineers Europe District

APO AE 09049

ar167

Statement of Work Project Number:

OHASIS# 35462

Mabanda Primary School Renovation Mabanda, Gabon

Prepared by:

Design Section

Engineering Branch

09 JUNE 2020

01 10 10 Statement of Work Mabanda Primary School Renovation – Mabanda, Gabon

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SECTION 01 10 10

STATEMENT OF WORK

SECTION TABLE OF CONTENTS:

1 GENERAL

2 CIVIL AND GEOTECHNICAL

3 ARCHITECTURAL

4 STRUCTURAL

5 ELECTRICAL

6 MECHANICAL

ATTACHMENTS

Attachment # 1 Project Location Maps Attachment # 2 Conceptual Site Plans Attachment # 3 Conceptual Floor Plan Attachment # 4 Structural Calculations Guideline AOR AFRICOM Attachment # 5 Rainwater Tank Example Attachment # 6 Dedication Plaque Attachment # 7 Photos School Compound

1.0 GENERAL

1.1 PROJECT DESCRIPTION

The Request for Proposal (RFP) provides parameters for a design-build project for renovation of an existing school compound and the construction of a new classroom building in Mabanda, Gabon; Latitude 2°49'01.3"S, Longitude 11°31'46.9"E (See Attachment #1-Location Map.)

The project includes the following general items of work, detailed requirements are contained elsewhere in this Statement of Work:

a. Clear, grub, and grade the site

b. Renovate existing three (3)facilities including enclosing open storage at one end of the building, replacement of roof and roof structure

c. Renovate the existing school director’s house

d. Renovate existing plumbing system of latrine rooms as part of building #2

e. Construct new School Building

f. Provide site improvements including new wall around the school compound

g. Provide new rainwater catchment system

h. Renovate electrical and mechanical systems.

1.2 GENERAL REQUIREMENTS

The Contractor must deliver fully functional, turnkey type facilities (without furniture) as described in this document. The work includes - but is not limited to - design, demolition, fabrication, delivery, installation, construction, and site work. The facility and the installed equipment must be permanent construction.

The facility in this project must be complete and usable to meet codes and technical and functional requirements per this Statement of Work (SOW). The proposal price must include all design, calculations, approvals, certificates, fees, labor, material, equipment, direct overhead, indirect overhead, general and administrative expenses (G&A) and general conditions to complete this project as described in the SOW.

These design and product requirements are minimum requisites. Compliance with the provisions of this section by subcontractors is the responsibility of the Contractor.

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1.2.1 BASE ITEMS AND OPTIONAL ITEMS

This Statement of Work addresses the technical requirements necessary to complete all work associated with this project. For information and requirements regarding the allocation of pricing between elements of the work, refer to Specification Section 01 22 00 PRICE AND PAYMENT PROCEDURES. The Schedule of Items identifies the breakdown between the individual base items and optional items for all work identified in this Statement of Work, associated drawings, and attachments. All work as described in these documents is included in either the Base or Optional Items. Consider all items not specifically identified in the Optional Items as part of the Base Items.

1.3 FUNCTIONAL AREAS

Refer to the attached drawings for a depiction of the required functional areas and spatial adjacencies for the site and new facilities/structures.

Design and construct the facility as a new single-story, solid masonry / concrete building with sloped roof.

Provide the following functional areas within the facility:

1.3.1 First floor new school building

Classroom 1 95.20 m2 Classroom 2 95.20 m2 Storage 24.10 m2

Electrical 6.20 m2

Covered Terrace 34.50 m2

Total usable area to be provided: approximately 255.20 m2 net.

1.3.2 Renovation work existing buildings

Three school buildings app. 648 m2

School director’s house app. 84 m2

1.4 SUBMITTALS

Designer of Record approval is required for submittals with a “DA” designation.

Government approval is required for submittals with a “G” or “GA” designation.

Submittals having an “FIO” designation are for Contractor Quality Control approval. Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-01 Preconstruction Submittals]

Demolition Plan; G

SD-05 Design Data

65% Pre-Final Design; DA/GA

95% Final Design; DA/GA

100% Corrected Final Design; DA/GA

SD-06 Test Reports

Test Results and Reports; FIO

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1.4.1 DESIGN SUBMITTALS

Provide a complete design package at each milestone, as described in Specification Section 01 33 16 DESIGN AFTER AWARD. The milestones for this project are indicated above in Section 1.4 SUBMITTALS. The specific requirements of each milestone are described in each discipline-specific section of this Specification.

1.4.2 TEST REPORTS

Provide all test results and reports identified in this SOW to the Government as a submittal in accordance with Specification Section 01 33 00 SUBMITTAL PROCEDURES.

Submittals will be considered for information only (FIO) submittals unless specifically identified as a submittal requiring government approval. Coordinate with the COR after award for the specific items to be included in the submittal register.

1.5 MATERIALS AND EQUIPMENT

Materials and products used must be durable, heavy duty, industry standard. The equipment must be the manufacturer’s standard quality and must be compatible with all other equipment and materials within the system or assembly. Equipment and materials must include all connections and accessories necessary to ensure operability and correct installation according to manufacturer’s requirements.

Provide a nameplate secured to each major piece of equipment. Each nameplate must have the manufacturer’s name, address, contact information, type or style, model or serial number, and catalog number. The definition of a “major piece of equipment” is at the discretion of the COR.

1.5.1 LIFE-SPAN

Construction must have an expected life span of 25 years.

1.5.2 MAINTAINABILITY

Provide low maintenance materials and systems appropriate for the project climate and location.

1.5.3 OPERABILITY

Systems (including but not limited to architectural, electrical, communications, and mechanical systems) must be simple to operate and easy to maintain.

1.5.4 STANDARDIZATION

Provide standardized materials, products, equipment, and systems to minimize the requirements for replacement parts, storage facilities, and service requirements.

1.6 DESIGN DIMENSIONS

Develop the design using the metric system.

1.7 DESIGN CRITERIA

Project design, site facilities, utility systems and material standards must be in accordance with Host Nation building codes (current versions as of the date of RFP, unless otherwise indicated). In the absence of Host Nation building codes, use the International Building Code (IBC) and codes, technical standards, and regulations referenced in this RFP.

While this RFP references various source standards and specifications, all design documents must meet Host Nation codes and requirements. It is the designer's responsibility to demonstrate that the Host Nation standard is equal to the cited standard or specifications being supplanted. Apply the more restrictive standards when conflicts arise between the requirements of this RFP and any referenced or other applicable codes, standards or regulations. If equivalency cannot be met, use the more stringent requirement and quote both codes verbatim in correspondence

15-Jun-20 Page 5 of 47 to the COR. The designer is responsible to determine the required material and execution standards where specific standards are not indicated.

Provide an electronic copy of the local Host Nation standards and building codes in their original language as related to facility design and construction.

1.8 SPECIAL CONSTRUCTION REQUIREMENTS

1.8.1 DEMOLITION

The Contractor is responsible for all required demolition as indicated in this scope.

Submit a Demolition Plan to be tracked via the submittal register indicating all demolition, abatement, and disposal methods.

1.8.1.1 ABATEMENT AND DISPOSAL

All demolished materials must be abated and disposed of in accordance with local laws, codes and regulations. The Contractor is responsible for all required testing before, during and after demolitions as well as for all required compliance with safety standards.

1.8.1.2 DEMOLITION AND DISPOSAL OF HAZARDOUS MATERIAL

The Contractor is responsible to survey the site and determine if hazardous materials exist. If hazardous materials are found to exist, immediately notify the COR, and provide the COR with the results of the relevant sampling and testing.

Provide the hazardous material report to the COR no later than 30 days after Notice to Proceed (NTP) for information and approval.

1.8.2 PROTECTION OF WORK AREA

Seal the project area with construction barriers and dust partitions in order to contain construction dust and debris and maintain a clean environment outside of the work area. In addition to protections within the work area, provide temporary protection for all finishes from the entrance of the facility to each area of work. Patch and repairing any damage caused during construction. Coordinate the locations of barriers with the COR prior to the start of work.

1.8.2.2 PROTECTION OF FURNITURE, FIXTURES, AND EQUIPMENT

Protect all existing furniture, fixtures, and equipment that remain within the work area. Coordinate with the COR and the User for any special protection measures required for sensitive equipment. The Contractor is responsible for repairing or replacing any damage caused during construction. Either the Contractor or the COR may request to conduct a preconstruction survey of furniture, fixtures, and equipment with both the Contractor and Government representative present.

1.8.2.3 NOISE AND VIBRATION CONTROL

Employ demolition and construction methods that minimize the production of sound and vibration. Coordinate the schedule of especially loud or disruptive activities with the COR prior to the start of work.

1.8.2.4 PROTECTION OF EGRESS AND LIFE SAFETY

The Contractor must not take actions that hinder existing egress paths or disrupt operation of life safety systems without prior coordination with the COR and all applicable authorities having jurisdiction (AHJ). The Contractor is responsible for supplying signage or other protective measures as required by the COR or AHJ prior to impeding the egress path or life safety system.]

END OF SECTION

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2.0 CIVIL AND GEOTECHNICAL

Provide and perform civil engineering design and construction services as required to provide a complete, accessible, functional and usable project. The Contractor is required to extensively coordinate civil design and construction work with the scope of the other disciplines described in this SOW.

2.1 SCOPE SUMMARY

Civil works for this project include, but are not limited to, site survey, geotechnical investigation, site layout, demolition, earthwork, sanitary system, and water system. Refer to the bid schedule for which of these are base bid or optional.

2.2 EXISTING CONDITIONS

2.2.1 TOPOGRAPHY

There is no known topographic survey for the project site. The existing site contains three school buildings, gravel pavement, septic system, an existing fence, and vegetation as shown on the attached Conceptual Site Plan. The site generally slopes 2% to the south. The existing information shown on the Conceptual Site Plan was compiled from a site visit, google earth, and site photos.

2.2.2 UTILITIES

There is no storm system at the site.

There is no water system at the site.

Black water sanitary discharges to a septic tank/ leach field from Building No. 02, it is assumed there is an existing sanitary sewer line connecting the existing latrines to the septic tank.

Contractor must verify all utility locations (surface and subsurface) in the field prior to the first design submittal.

2.2.3 GEOTECHNICAL

There is no geotechnical information available for the project site.

2.2.4 ENVIRONMENTAL

There are no known environmental protection areas or archeological preservation areas on the project site. There is no prior knowledge of any hazardous or contaminated materials in the site’s soil.

2.2.5 EXISTING CONDITIONS INVESTIGATION

Prior to bid, investigate the general and local conditions which can affect the work and/or its cost, including but not limited to:

a. Weather, river stages, tides, or similar physical conditions at the site.

b. Surface and subsurface materials or obstacles to be encountered insofar as this information is reasonably ascertainable from an inspection of the site and due diligence research of as-built drawings, geotechnical reports, environmental reports, and publicly available information on the site.

c. Mobilization and staging constraints.

2.3 DESIGN SUBMITTALS

Provide civil design submittals in accordance with RFP Section 01 33 16, DESIGN AFTER AWARD and in compliance with SOW Section 1.0 – GENERAL.

65% Design Submittal:

a. Preliminary Design Analysis of civil features.

b. Final Site Survey (include in the Design Analysis).

c. Final Existing Conditions Plan.

d. Preliminary Demolition Plan

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e. Preliminary Site Layout Plans - Indicate existing and proposed Civil features.

Include other disciplines’ features (faded back) that affect the Civil Design (buildings, mechanical structures, electrical utilities, etc).

f. Preliminary Utility Plans (Sanitary, and Water).

g. Preliminary Fencing Layout Plans (coordinate with Structural Section 4.0)

h. Preliminary Civil Specifications

95% Design Submittal:

a. Update all items from the previous Design Submittal to 95% (Final) Design.

Incorporate all previous design comments.

100% Submittal:

The 100% Submittal provides a complete and final set of contract documents ready for construction. Update all Final submittals from 95% to a corrected Final submittal.

Address all previous government review comments before submitting.

2.3.1 DESIGN ANALYSIS

Provide a Design Analysis for all Civil features that documents significant design choices and substantiates design compliance with contract requirements, applicable codes and standards. Documentation includes narrative, calculations, photographs, sketches, and catalog cut sheets. Reference all applicable regulations, standards, and criteria for the design. Reference sources are subject to Government approval.

Provide design assumptions. For design choices, discuss alternative systems considered, and provide rationale for the selected alternative.

The Design Analysis includes but is not limited to:

a. Discussion of Site Layout constraints and design decisions, including but not limited to, land use, vehicle and pedestrian access, orientation of features on-site, setbacks from site features, minimizing utility lengths, and tree removal, and future expansion.

b. Discussion of Demolition constraints and design decisions. Include discussion on how access will be provided during construction, and how each utility will be maintained and operated during construction.

c. Discussion of Sanitary system constraints and design decisions. For each section of pipe, include analyses indicating pipe size, friction factor, length, elevations at each end of pipe, slope, design flow (Q), maximum flow capacity, design depth of flow, design percentage full, and design flow velocity. Provide calculations for sizing of structures, septic tanks, and infiltration structures. Provide calculations on the pipe’s structural capacity if the pipe is shallower than required in section 2.10-Utilities. Include pertinent geotechnical information that affects the sanitary system. Confirm that the existing receiving system has adequate capacity to receive the additional sanitary flow generated by the project.

d. Discussion of Water system constraints, design decisions and source. Provide calculations to demonstrate water system meets project requirements, including demand, water pipe sizing, design water pressure and flow rates at buildings.

Provide calculations on the pipe’s structural capacity if the pipe is shallower than required in section 2.10-Utilities. Provide well and water tank calculations.

e. Discussion of Perimeter Wall layout constraints and design decisions.

f. Site Survey as an appendix.

2.3.2 DESIGN DRAWINGS

Provide Civil design drawings of sufficient detail to address the requirements of each design submittal. Civil drawings include plans, profiles, cross sections, and details of Civil features for the project. Civil drawings also include temporary construction plans/methods that affect the design and construction of the project.

These temporary plans include mobilization, traffic control, erosion control, dewatering, shoring, construction sequence, etc. Design drawings include all

15-Jun-20 Page 8 of 47 necessary information (labeling, dimensioning, legend, details, notes, etc.) to allow for complete understanding and constructability of all proposed features.

Provide comprehensible differentiation between features that are proposed, existing, future, or proposed to be demolished by use of appropriate choice of line styles, line weights, and/or colors. Reference USACE A/E/C Graphics Standard for graphic requirements.

2.3.3 SPECIFICATIONS

Provide Civil specifications of sufficient detail to address the requirements of each design submittal. Specifications, when combined with the design drawings, allow for complete understanding and constructability of all proposed Civil features.

2.4 DESIGN CRITERIA

Provide civil design in accordance with Host Nation codes. In the absence of Host Nation codes, use the latest release of the International Building Code (IBC) and the following codes and technical standards:

a. Uniform Facility Criteria (UFC) 3-201-01, Civil Engineering

b. UFC 3-220-01, Geotechnical Engineering

c. USACE A/E/C Graphics Standard (ERDC/ITL TR-12-1)

UFC 3-230-01, Water Storage, Distribution, and Transmission UFC 3-240-01, Wastewater Collection

WHO Fact Sheet 3.9 – Septic Tanks.

2.5 GEOTECHNICAL INVESTIGATION AND REPORT

Perform any geotechnical investigations necessary for the design and construction of project features. Provide any geotechnical investigations and reports to the Government that are performed. Provide geotechnical information and assumptions in the Design Analysis to support design decisions. In the absence of geotechnical investigations performed on-site, an allowable soil bearing pressure is discussed in STRUCTURAL section 4.0. Perform geotechnical work required for construction (i.e. compaction tests, inspection of structure foundation excavations). In the absence of Host Nation standards, perform the geotechnical scope of work per UFC 3- 220-01, Geotechnical Engineering and IBC.

2.5.1 REPORT

Include, as a minimum, the following information:

a. Description of field work completed and equipment used; names, signatures and stamps of licensed professionals involved; name of drilling company.

b. A description of site subsurface conditions, regional geology, and seismic conditions at the site.

c. Site map of borehole and test pit locations.

d. High resolution color digital photographs of each borehole and test pit location.

e. Test pit logs with classification of all subsurface materials. The logs must distinguish fill materials from native materials, include all in‐situ test results, and include groundwater depth information, if groundwater is encountered. Distinguish between bedrock and rock boulders.

f. Reports of all the field and laboratory testing.

g. Recommendations for allowable bearing capacity, expected settlement, type of foundation, minimum footing and grade beam dimensions, lateral earth pressure parameters, and minimum depth of foundation for footing and grade beams.

h. Recommendations for preparation, placement, and compaction of onsite soils, borrow material, soil replacement, soil amendment/treatment, structural fill, topsoil, and trench backfill. Include dewatering and temporary retaining structure needs.

i. Soil Resistivity.

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j. Recommendations for the storm and septic systems involving infiltration.

Calculations to support conclusions and recommendations

2.6 SITE SURVEY

Conduct and provide a topographic survey from a licensed surveyor that includes all existing site information needed to design and construct the project. Survey must be conducted prior to the first design submittal. Include x, y, and z coordinates to the nearest 0.005 meters, dimensions, material, and basic characteristics of all features within the project site limits, as well as all features outside of the project site limits that will affect the design and construction of the project.

Research record drawings to obtain utility and pavement information that is not visible from the surface. Provide notes indicating the sources and any limitations or assumptions of the data. Provide a copy of the survey in CAD, in addition to the paper/electronic requirements of the Design Analysis. Locate and show on the topographic survey the following information:

a. Property boundary, public right of way, and easements. Include the address numbers, street names, and easement records.

b. Survey monuments. Include description.

c. Spot elevations covering the entire survey limits showing high points, low points, grade changes, and at sufficient intervals to represent the general character of the terrain.

d. Contours in intervals of 0.25 meters.

e. Buildings and other miscellaneous structures. Provide finish floor elevation.

f. Surface Drainage Features. Indicate normal water level for water bodies.

g. Utility lines and structures. Include rim elevations and invert elevations for utility structures; identification of lines as underground or aboveground;

pipe sizes and materials.

h. Fences. Include height, material, gate locations and types.

i. Signs. Include sign text.

j. Trees/Woods: In wooded areas that trees are to be protected, locate outside drip line of wooded area, include general density and type of trees. For wooded areas with proposed tree removal, identify trees per Host Nation permitting requirements. Where selective clearing will be proposed, locate trees over 150 millimeter diameter at chest height, and include tree species, diameter at chest height, and dripline diameter.

k. Locate environmentally sensitive areas (determined and marked by others).

l. North arrow and scale of drawing.

m. Legend depicting the symbols and abbreviations used on the drawing.

n. Horizontal and vertical coordinate systems, date of survey, licensed surveyor name and license number.

Site information provided to the Contractor by the Government is not to be considered accurate Site Survey information. Utility field locates and as-built research are the responsibility of the Contractor.

Upon completion of construction, update the original survey with an As-built survey of the site as constructed, including underground utility locations and depths.

Submit the As-built survey to the COR for approval.

Reference UFC 3-201-01, Civil Engineering, Section 2-2.2-SURVEYING for survey requirements. Use the Universal Transverse Mercator (UTM) coordinate system. The vertical coordinate system must be based on sea level.

2.7 SITE LAYOUT

Locate the proposed improvements as indicated on Attachment #2 – Conceptual Site Plan. Amend the site layout as determined by the site-specific constraints, the owner’s preferences, accessibility, future expansion, and opportunities that are identified and evaluated as part of the Contractor’s scope of work.

https://en.wikipedia.org/wiki/Universal_Transverse_Mercator_coordinate_system https://en.wikipedia.org/wiki/Universal_Transverse_Mercator_coordinate_system

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The Contractor is responsible for all aspects of the project whether they are shown on the conceptual plan or not.

2.8 DEMOLITION

Remove existing structures, utilities, septic tank and drainfield, pavement, vegetation, and any other features to construct the proposed improvements. All contaminated soils discovered require special testing and disposal per Host Nation requirements.

2.8.1 CONSTRUCTION LIMITS

Do not disturb the project site beyond necessary for installation of proposed construction. Do not disturb any areas past the site’s property line. Show demolition work and limits of disturbance in the drawings. Stake-out the limits of disturbance on-site with temporary fencing before beginning construction.

2.8.2 ITEMS TO REMAIN IN PLACE WITHIN CONSTRUCTION LIMITS

Take necessary precautions to avoid damage to existing items to remain in place, to be reused, or to remain the property of the Government. Repair or replace damaged items as approved by the COR. Construct and maintain shoring, bracing, and supports as required. Ensure that structural elements are not overloaded. Provide new supports and reinforcement for existing construction weakened by demolition, deconstruction, or removal work. Repairs, reinforcement, or structural replacement require approval by the COR prior to performing said work.

2.8.3 TREES

Unless otherwise noted on Att#2-Conceptual Site plan, protect trees which might be damaged during construction, with a 1.8 meter high fence around the dripline of the tree(s), which is assumed to be the extent of the tree’s roots. Trees are defined as larger than 150mm diameter at 1.3 meters above existing grade. Mitigate for tree removal per Host Nation requirements.

2.8.4 UTILITIES

Any existing utilities encountered that are impacted by this project must be protected, or relocated if protection is not feasible. Remove existing and abandoned utilities under or within 3.0 m of the foundation of any proposed facility or building foundation. Reroute existing utilities to remain in accordance with SOW Section 2.10-UTILITIES. Abandoned utilities must be removed up to the utility main (or next utility main junction) and capped. Manholes or underground structures to be abandoned must be removed to a minimum depth of 50 centimeters below finish grade.

Fill abandoned manhole or structure per Section 2.9-EARTHWORK requirements.

2.8.5 DUST, DEBRIS, AND EROSION CONTROL

Prevent the spread of dust, debris, and erosion from the project site. Install erosion control measures before beginning construction. Sweep pavements as often as necessary to control the spread of debris. Do not use water if it results in hazardous or objectionable conditions such as, but not limited to, ice, flooding, erosion, or pollution. Remove snow, dust, dirt, and debris from work areas daily.

Remove and transport the debris in a manner that prevents spillage on streets or adjacent areas. Apply local regulations regarding hauling and disposal.

2.9 EARTHWORK

Perform all earth work necessary for the installation of the proposed improvements.

Define earthwork requirements in the plans and specifications. Include requirements for satisfactory material, borrow material, structural fill, topsoil, utility trenches, replacement and improvement of on-site soils, soil compaction (for subgrades of structures, paving, and landscaped areas), compaction for utility trenches, maximum lift depths, density testing frequency, maximum temporary and permanent slopes, dewatering, and engineered support systems.

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Excavated material, if satisfactory for reuse, may be used on the project site where fill is required. Only gravelly and sandy non-cohesive materials shall be considered satisfactory for fill and backfill, with the provision that in any soil type the maximum particle size does not exceed 75 mm, the plasticity index is not greater than 30, the soil is not contaminated, and the soil does not contain trash, debris, or organic material. In case of a difference of opinion about the classification of soil type acceptability, an independent professional soils engineer shall be engaged at cost to the Contractor.

Unsatisfactory material, and surplus excavated material not required for fill, shall be disposed of offsite, and shall be the responsibility of the Contractor. Borrow material may be required for construction from sources off site. Borrow materials are to be free of hazardous materials and contaminants. Any soil brought in from off-site sources needs to be certified clean, or tested by the Contractor’s geotechnical engineer, for adverse contaminants above regulatory criteria, prior to use.

Provide engineered support systems as required for the construction of temporary and permanent earth structures such as slopes, utility trenches, constructions pits and any other structure requiring earth support. The Contractor shall be responsible for all dewatering necessary for earthwork.

During construction, all structure foundation excavations shall be inspected and approved by the Contractor’s professional geotechnical engineer prior to placing concrete. In the absence of geotechnical recommendations, compact soil to 95% density in 20cm lifts in loose thickness, and provide density tests on all lifts at a frequency of 1 test per 40 square meters for foundations and parking, and 1 test per 30 meters of road and utility trench. Round up to nearest whole number (i.e. a 25 square meter foundation requires one test). The location of all tests shall be selected by the Contractor’s geotechnical engineer, and copies of all test results shall be furnished to the COR.

2.9.1 PLANS AND SPECIFICATIONS

Define earthwork requirements in the plans and specifications. Include requirements for satisfactory material, borrow material, structural fill, topsoil, utility trenches, replacement and improvement of on-site soils, soil compaction (for subgrades of structures, paving, and landscaped areas), compaction for utility trenches, maximum lift depths, density testing frequency, maximum temporary and permanent slopes, and engineered support systems.

2.9.2 UNEXPLODED ORDNANCE (UXO) CLEARANCE

UXO survey is not required.

2.9.3 CONTAMINATED SOIL

Inspect and test all soil according to Host Nation requirements. If hazardous materials are discovered, cease excavation, secure the area, and notify the COR for further guidance.

2.9.4 CULTURAL RESOURCES

Cultural resources, such as archaeological remains, may be uncovered during excavation operations. If suspected cultural remains are found, cease excavation, secure the area, and notify the COR for further guidance.

2.9.5 TOPSOIL

Remove and save topsoil (approximately first 20 centimeters of excavation). Separate out subsoil, brush, litter, weeds, roots, stones larger than 25 mm in diameter, and other materials that would interfere with planting and maintenance operations. When

15-Jun-20 Page 12 of 47 restoring the site to finish grade, place topsoil back in excavated areas that do not include proposed paving or structures.

2.9.6 SATISFACTORY MATERIAL

Excavated material (below topsoil), if satisfactory for reuse per the Contractor’s Geotechnical Engineer, may be used on the project site where fill is required.

Unsatisfactory material, and surplus excavated material not required for fill, must be disposed of offsite, and is the responsibility of the Contractor. Borrow material may be required for construction from sources off site. Borrow materials are to be free of hazardous materials and contaminants. Any soil brought in from off-site sources must be certified clean.

2.9.7 BACKFILL COMPACTION

In the absence of Host Nation requirements and geotechnical recommendations, fill and backfill must be placed in layers of 20 centimeters loose thickness and compacted to a minimum 95% of the maximum dry density as determined by Host Nation test method equivalent to ASTM D-1557 (Modified Proctor test). Provide density tests on all lifts at a frequency of 1 test per 40 square meters for foundations and parking, and 1 test per 30 meters of road and utility trench. Round up to nearest whole number (i.e. a 25 square meter foundation requires one test). The location of all tests must be selected by the Contractor’s geotechnical engineer, and copies of all test results must be furnished to the COR. All structure foundation excavations must be inspected and approved by the Contractor’s Geotechnical Engineer prior to placing concrete. Repair earthwork areas as recommended by the Contractor’s Geotechnical Engineer, and approved by the COR.

2.9.8 ENGINEERED SOIL SUPPORT SYSTEMS

Provide engineered soil support systems (i.e. shoring) as required for the construction of the proposed improvements. The Contractor is responsible for all dewatering necessary for earthwork.

2.9.9 SITE GRADING

Provide site grading that directs storm water runoff away from buildings and structures either by drainage systems or by grading as follows:

Finished grades of earth/grass/gravel surfaces adjacent to buildings and structures must slope away from all exterior edges with a gradient of min. 5% for the first 3 meters.

a. Finished grades of paved surfaces adjacent to buildings and structures must slope away from all exterior walls with a gradient of min. 2% for the first 3 meters.

b. Finished grades must not create stagnating water or ponding anywhere on the project site, nor create ponding on adjacent properties.

c. Set building finish floor elevations at a minimum of 30cm above the local 100 year flood level, if the proposed finish floor is different than the existing building it is connecting to. In the Design Analysis, provide flood maps and/or hydrologic calculations and/or other engineering analysis to determine this elevation.

d. Site grading around the building must meet local accessibility guidelines.

In the absence of local codes for handicapped accessibility, Architectural Barrier Act requirements apply. The Contractor must limit proposed landscape slopes to a maximum 2H:1V, or as recommended by the Contractor’s geotechnical engineer.

2.10 UTILITIES

Proposed utility main alignments must be at least 3.0 meters from facility or building foundations, except for building connections. Provide horizontal and vertical separation between new and existing utilities for rehabilitation, 15-Jun-20 Page 13 of 47 maintenance, repair or replacement. Provide utility line depths, bedding, and backfill as required by applicable requirements and geotechnical recommendations.

Minimum cover over pipes is 0.6 meters; greater than frost penetration; or sufficient to support imposed dead and live loads for the pipe materials used; whichever is more stringent. Place plastic warning tape along the route of the buried pipe after installation at a height of 0.3 meters above the pipe.

Any existing utilities encountered within the site boundary that are impacted by this project must be protected, or relocated if protection is not feasible. Utilities impacted by this project that require decommissioning, or that are already out of service, must be removed up to the property line. Cap utilities at property line per applicable codes. Manholes or underground structures to be abandoned must be removed to a minimum depth of 50 cm below finish grade. Fill abandoned manhole or structure per Section 2.9-EARTHWORK requirements.

Provide utility materials per IBC requirements. Provide corrosion protection for utilities that provides the minimum life expectancy specified in GENERAL Section

1.0. Any piping or equipment exposed to sunlight must be coated with protective coatings suitable for UV exposure with a minimum expected coating life of 10 years before recoating.

2.10.1 STORM SYSTEM,

Provide a storm drainage system to direct runoff away from improvements and eliminate ponding. Connect building roof gutters and downspouts to two rainwater tanks (5000 liter each) as shown on Attachment#2-Conceptual Site Plan and Attachment#5-Rainwater Tank Example. Locate tanks out of pathways and windows. For each rainwater tank, provide a spigot at the bottom of each tank. Below the spigot, provide a splash block that will drain water away from building foundations a minimum of 3 meters per site grading requirements. Provide an overflow system from the tanks to the “Grey Water” gutter system or splash blocks that drain away from foundations a minimum of 3 meters per site grading requirements. Reroute existing “Grey Water” system as necessary. Provide insect screens to all open orifices to the tank system. Provide UV resistant tanks. Provide concrete foundation to support rainwater collection tank, and install the bottom of the tank a minimum of 45 centimeters above finish grade. Provide structural tie downs for the tank. Provide an opening for cleaning and allow access into the tanks. Provide system in order to divert first flush from the roofs that may be contaminated with dust, animal droppings and dirt so that it does enter the tank. Provide sign next to tap that shows a pictogram “not for drinking”. Sign must be firmly fastened aluminum or other durable weather resistive material (no adhesive sticker allowed).

The storm system must function by gravity, filling the water collection tanks without use of a pump system. In the absence of host nation standards, design the storm drainage system per UFC 3-201-01, Chapter 3-Storm Drainage Systems.

2.10.2 SANITARY SYSTEM

Replace the existing septic tank and drain-field with a new septic tank and drain-field, piping, and all appurtenances. Size the tank and drain-field based on the occupancy (estimated 165 students) and a 5 year maintenance schedule of pumping of the septic tank. The system must have the ability to be monitored, pumped out, and have an alarm system when the capacity is being reached that reports to the building.

Proposed septic tank and drain-field location indicated on Conceptual Site Plan;

adjust site as necessary to meet site conditions.

Connect the remodeled existing building and “Black Water” sanitary discharges to on-site septic system consisting of a septic tank and drain-field Size the tank and drain-field based on the building occupancy (estimated 10 personnel) and a 5 year maintenance schedule of pumping of the septic tank. Proposed septic tank and drain-field location indicated on Conceptual Site Plan; adjust site as necessary to meet

15-Jun-20 Page 14 of 47 site conditions. Connect the remodeled existing building and proposed addition “Grey Water” sanitary discharges to the existing “Grey Water” system. Reroute existing sanitary system as necessary. The “Gray Water” system must not connect to the “Black Water” septic system.

Allowable sanitary pipe materials include polyvinyl chloride (PVC), high density polyethylene (HDPE), or ductile iron. Sanitary structures must be concrete, with traffic rated cast iron or ductile iron frames and covers. In the absence of Host Nation standards, design the sanitary system per UFC 3-240-01, Wastewater Collection.

See SOW Section 6.0 – MECHANICAL for indoor sanitary scope.

2.10.3 WATER SYSTEM

Connect the remodeled existing building to the site’s water system as described in Section 06 - MECHANICAL. Reroute existing water lines as necessary to connect to the water tank system. In the absence of Host Nation standards, design any exterior water system per UFC 3-230-01..

See SOW Section 6.0 – MECHANICAL for indoor water scope, and water tank scope of work.

2.12 PERIMETER WALL

Provide a 2.1 meter high concrete block wall around the perimeter of the property as shown on Att#2-Conceptual Site Plan and as described in Section 4.10 NEW WALL SUROUNDING THE SCHOOL COMPOUND. Limits shown on the drawing are approximate; final limits to be approved by the COR with final design. Provide one 4.5 meter wide double swing steel plate gate at the main site access, gate shall be provided with a sliding observation window. Provide one 4.5 meter wide double swing steel plate gate for septic tank access; provide two steel plate 1.5 meter wide personnel gates as shown on the conceptual site plan. All gates shall match wall height. Provide a lock for each gate with 2 keys for each lock. Host Nation equivalent wall and gates may be acceptable per COR approval

2.13 LANDSCAPING

Provide 15 centimeters of compacted gravel with a maximum particle size of 3 centimeters in areas that do not have pavement or a building within the limits of disturbance. Refer to 2.9 EARTHWORK section for minimum compaction requirements.

2.14 MOBILIZATION / STAGING Locate mobilization and staging to the south of the site. Locate mobilization and staging to areas that do not disrupt operations at the installation.

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3.0 ARCHITECTURAL

3.1 PROJECT DESCRIPTION

Provide and perform architectural design and construction services to provide a complete, accessible, functional, and usable Primary School Facility in Mabanda, Gabon

Renovate three (3) existing single-story masonry/concrete buildings that serve as primary school and kindergarten, accommodation 290 students. The renovation work for the existing school buildings is limited on enclosing an open storage at the end of building #3 to be used as a classroom, replacing the existing roof and patch and paint interior walls and ceilings as well as rehabilitation of existing floor surface.

Provide one (1) new single-story, solid masonry / concrete building with two (2) classrooms one (1) storage room and one (1) electrical room that will serve as School Building.

Extensive coordination is required between the architectural work and the civil, geotechnical, structural, fire protection, mechanical, and electrical requirements of this project.

3.1.1 DESIGN

Provide a design and construction package that uses the space allocations, functional adjacencies, design details, and features given or referenced in this RFP. The design must incorporate all referenced codes and regulations. The Contractor is responsible for creating additional details as required to complete a full design. All details must conform to the requirements of this RFP and are subject to the approval of the COR. A schematic design for the new building has been attached for reference. The schematic plans are provided for diagrammatic purposes only and do not necessarily represent an approved floor plan or design.

The Contractor is responsible for providing a design that meets all requirements of the User and the codes and criteria referenced in this Statement or Work.

3.1.2 DESIGN SUBMITTALS

Provide all architectural submittals after contract award in accordance with Section 01 33 16 DESIGN AFTER AWARD and Section 01 33 00 SUBMITTAL PROCEDURES.

Prepare and submit the documents listed below at the submittals indicated.

3.1.2.2 65% DESIGN SUBMISSION

Include the following drawings and reports as applicable to the project:

a. Code Summary – Provide a tabular code compliance summary indicating Host Nation and/or IBC life safety requirements for all new facilities.

b. Life Safety Plans – Provide plans depicting smoke/fire resistance ratings, egress routes, dead-end corridors, exits, and other aspects of life safety pertaining to the design.

c. Demolition Plans – Provide existing floor plans, indicating all demolition required.

d. Floor Plans – Provide all floor plans, indicating room names, areas, and basic dimensions, scale 1:50.

e. Ceiling Plans – Provide reflected ceiling plans for all rooms, indicating ceiling materials and fixtures, scale 1:50.

f. Building Elevations – Provide all building elevations indicating all exterior materials.

g. Roof Plan – Provide a plan of all roof areas, indicating direction of slope and method of drainage.

h. Building Section – Indicate heights of critical building elements.

i. Wall Section - Provide a typical interior and exterior wall section for each building – describe wall materials.

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j. Interior Elevations – Provide interior elevations of all bathrooms and built-in casework and kitchenettes, indicate critical heights of surfaces and plumbing fixtures and describe all materials and finishes.

k. Pre-Final Design Analysis – Provide a narrative explaining the design and indicating how the design and materials meet the requirements of this SOW.

l. Pre-Final Specifications – Provide detailed explanations of requirements for all performed work or provide product specific manufacturer information (brochures, technical information, cut sheets) for all materials and products to be provided/installed.

3.1.2.3 95% DESIGN SUBMISSION

The 95% Submittal provides a complete and final set of contract documents essentially ready for construction by the D/B Contractor. All previous government review comments must have been addressed. Include the following drawings and reports as applicable to the project:

a. All documents from the 65% submittal updated to incorporate 65% review comments.

b. Floor Plans – Provide all floor plans, indicating room names, areas, and dimensions, scale 1:50.

c. Building Elevations – Provide all building elevations indicating all exterior materials.

d. Roof Plan – Provide a plan of all roof areas, indicating direction of slope and method of drainage.

e. Building Section – Indicate heights.

f. Wall Sections – Provide sufficient wall section(s) to indicate all materials and different conditions.

g. Section and Plan Details – Provide details of critical building intersections.

h. Window and Door Schedule – Provide a schedule of all windows and doors, indicating sizes, hardware, and operation.

i. Stair Section and Details.

j. Finish Schedule – Indicate all proposed finishes.

k. Final Design Analysis – Provide a finalized narrative describing all work to be performed on the project and how it meets the functional and code requirements of the project. Provide product specific manufacturer information (brochures, technical information, cut sheets) for all materials and products to be provided/installed.

l. Final Specifications – Provide line items and detailed descriptions of all work to be performed.

3.1.2.4 100% DESIGN SUBMISSION

The 100% Submittal provides a complete and final set of contract documents ready for construction by the D/B Contractor. All previous government review comments must have been addressed. Include all drawings, specifications and calculations from the 95% Submittal updated to incorporate all previous review comments.

3.2 TECHNICAL CRITERIA AND STANDARDS

Design and construct the project in accordance with the requirements outlined in Section 1.7 DESIGN CRITERIA.

3.2.1 LIFE SAFETY REQUIREMENTS

The Design must meet all Host Nation and local Fire Suppression System codes and requirements.

All structures to be provided must have exits and means of egress that comply with current Host Nation codes and standards, or in accordance with US codes and standards.

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In the absence of Host Nation codes and standards, for individual concerns of Life Safety the Contractor must follow appropriate US codes and standards, including the International Building Code (IBC.

3.2.2 HANDICAPPED ACCESSIBILITY REQUIREMENTS

All facilities must meet applicable Host Nation handicapped accessibility requirements.

Additionally, the design must meet the following minimum requirements of the US Architectural Barriers Act (ABA):

a. All changes in level must meet the requirements of Section 303;

b. All doors must be designed to meet the door clear width and maneuvering clearance requirements of Section 404;

c. All ramps must be designed to meet the slope, width, rise, and landing requirements of Section 405; and

d. All stairs must be designed to meet the tread and riser size and nosing requirements of Section 504.

3.3 GENERAL SCOPE OF WORK

Design the architectural elements of this facility to withstand all site-specific environmental conditions such as wide seasonal temperature swings, local wind, rain, snow and earthquake conditions. All architectural features must be appropriately braced for anticipated seismic activity. The Contractor may propose alternate building materials to meet the facility’s requirements, but final selection of materials is subject to the approval of the COR. Consider economics not only in the initial acquisition, but also in the future maintenance of the materials, when selecting materials and building systems to be incorporated into the project. When requested, the Contractor must provide documentation demonstrating that a chosen alternative material is life cycle cost effective.

3.4 DETAILED SCOPE OF WORK

The Contractor is responsible for the following specific tasks required for the construction of this facility.

3.4.1 DEMOLITION

Demolition work includes, but is not limited to, the following items:

a. Demolish and remove existing roof structure and roof layers on three (3) school buildings;

3.4.2 BUILDING SYSTEM AND MATERIALS

The intent of this RFP is to allow the Contractor the maximum flexibility to design and construct this facility in an economical manner without sacrificing good engineering practices, quality materials and systems. The Government requires low or no maintenance finish materials to the greatest extent possible. Building materials as described herein for roofing, walls, ceilings, doors, windows and floors are minimum requirements and may require revision based on code compliance and criteria.

3.4.2.1 FIRE PROTECTION RATINGS OF INTERIOR FINISHES

All interior finishes must conform to Host Nation fire protection standards/requirements or equivalent US standards/requirements.

3.4.2.2 ACOUSTICAL DESIGN

Doors, walls, floors, and ceilings must meet the minimum sound protection per Host Nation requirements.

3.4.2.3 THERMAL INSULATION

Provide thermal insulation in accordance with Host Nation and local requirements.

At a minimum, provide thermal insulation in accordance with the International Energy Conservation Code (IECC).

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3.4.2.4 CORROSION PREVENTION

All exterior materials and finishes must be appropriate for continuous exterior exposure. All materials susceptible to UV degradation must contain UV inhibitors.

Provide corrosion resistant coatings on all materials susceptible to corrosion.

Coatings must be applied in the factory prior to delivery to the maximum extent practicable. Physically separate dissimilar metals with non-conductive hardware.

Do not install aluminum in direct contact with concrete.