A-2_Statement_of_Work_Final_13-R-0018.pdf

W912GB-13-R-0018: Krasts Ambulance Support Station in Riga, Latvia Statement of Work

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US Army Corps of Engineers Europe District

APO AE 09049

Krasts Ambulance Support Station

Riga, Latvia

Prepared by:

Design Team

Engineering Branch

1 February 2013

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SECTION 01010

STATEMENT OF WORK

SECTION TABLE OF CONTENTS:

1 GENERAL

2 CIVIL & GEOTECHNICAL

3 ARCHITECTURAL

4 STRUCTURAL

5 ELECTRICAL & COMMUNICATIONS

6 MECHANICAL

ATTACHMENTS

Att. 1 Building Floor Plan Att. 2 Site Plan Att. 3 Covered Parking Concept Att. 4 Topographical Plan

1. GENERAL REQUIREMENTS

1.1 PROJECT DESCRIPTION

1.1. Krast

The work includes but is not limited to the renovation of the existing ambulance facility as described in this document and the construction of a 9 bay ambulance maintenance / cleaning garage. Eight (8) of the bays will be used for parking, one (1) for maintenance and cleaning. The bays used for parking will be open to the front and only covered by a roof while the maintenance / cleaning bay will be closed with a roll-up door and equipped with a drain.

The The Contractor shall deliver fully functional, turnkey type facilities (without furniture) as described in this document and attached drawings. The Contractor shall provide to the Contracting Officer’s Representative (COR) and the Corps of Engineers all design drawings, shop drawings and certificates as well as calculations and all permits and permissions prior the start of the construction.

1.2. The building(s) shall be designed and constructed in accordance with current standards and building codes as described in these documents.

1.3. The Contractor's design and construction must comply with technical requirements contained herein. The Contractor shall provide design and construction using the best blend of cost, construction efficiency, system durability, ease of maintenance and environmental compatibility.

1.4. These design and product requirements are minimum requisites. The Contractor is encouraged to propose alternate design or materials that will be equally or more cost effective or allow for more timely completion durability, ease of maintenance and environmental compatibility. The Contractor will be required to submit information as requested by the Contracting Officer’s Representative (COR) to make a comparison of the proposed alternate. All variations must be approved by the Contracting Officer’s Representative (COR).

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1.5. Compliance with the provisions of this section by subcontractors will be the responsibility of the Contractor.

1.6. Any material installed that does not meet the requirements of this RFP shall be removed and replaced with materials that meet RFP requirements at Contractor’s expense. See Specification 01 00 15 Design After Award for additional information.

1.7 FUNCTIONAL AREAS AND SPACE ADJACENCIES

The functional areas of the various facilities shall be provided IAW enclosed drawings.

1.8 MATERIALS AND EQUIPMENT

1.8.1 Materials and products used, shall be durable, heavy-duty industry standard and be readily available on the local construction market. Replacement parts or patching materials shall also be readily available in the local market. The equipment shall be the manufacturer’s standard quality and shall be compatible with all other equipment and materials within the system or assembly. Equipment and materials shall include all connections and accessories necessary to ensure operability and correct installation according to manufacturer’s requirements.

1.8.2 Each major item of equipment shall have the manufacturer’s name, address, contact information, type or style, model or serial number, and catalog number on a plate secured to the item of equipment. Operation and Maintenance manuals shall be provided in accordance with Specification 01 7823.

1.8.3 All equipment delivered and placed in storage shall be stored with protection from the weather and temperature variation, dirt and dust, and other contaminants. The contractor will be responsible for the materials safety and condition while in storage. The government will not be responsible for damaged or missing equipment while the equipment is within the contractor’s control.

1.9 ASBESTOS CONTAINING MATERIALS

Asbestos containing material (ACM) will not be used in the design and construction of this project. If no other material is available which will perform the required function or where the use of other material would be cost prohibitive, a waiver for the use of asbestos containing materials must be obtained from the Contracting Officer’s Representative (COR).

1.10 LIMITATION OF WORKING SPACE

The Contractor shall, except where required for service connections or other special reasons, confine his operations strictly within the boundaries of the site (see site plan). Workers will not be permitted to trespass on adjoining property. Any operations or use of space outside the boundaries of the site shall be by arrangement with all interested parties. It must be emphasized that the Contractor must take all practical steps to prevent his workers from entering adjoining property and in the event of trespass occurring the Contractor will be held entirely responsible.

1.11 TEMPORARY STRUCTURES

The Contractor shall erect suitable temporary fences, lighting, and necessary structures to safeguard the site, materials and plant against damage or theft and for the protection of the general public and shall adequately maintain the same throughout the course of the contract. All utility costs to support temporary structures during the contract period of performance shall be paid by the Contractor.

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1.12 Design Dimensions

The design shall be developed using the metric system.

1.13 GENERAL DESIGN INSTRUCTIONS

Design Freedom: Requirements stated in this RFP are minimums. Innovative, creative, or cost-saving proposals, which meet or exceed these requirements, are encouraged.

The project conceptual site plan was developed by the Corps of Engineers; the design shall be developed by the D/B Contractor.

The Drawings and the RFP Specifications, along with the other information and requirements in this RFP, serve as requirements for the completion of the D/B Contractor’s design and construction documentation, along with other code, regulatory and professional practice requirements. The extent of development of these RFP documents in no way relieves the successful offeror from responsibility for completing the design, construction documentation, and construction of the facility in conformance with applicable criteria and codes.

The building layout plans illustrates desired general arrangements, orientation, and adjacencies, which are acceptable to the Government – it is not intended to dictate the final layout and image for the project. The D/B Contractor’s designers shall develop and refine the conceptual site and building design in their completion of the design and construction documents. Such development shall be consistent with the criteria and acceptable to the Government.

The D/B Contractor may adjust spaces, as required to accommodate structural layout, and as necessary to provide adequate space for mechanical, electrical and communication spaces. The spatial relationships and adjacencies in the RFP drawings, must be maintained, unless the D/B Contractor recommends changes to the Government, and the Government approves such changes.

All materials, fixtures, equipment, systems, etc. to be used in the construction of this project shall be new, and purchased for the purpose of constructing this facility.

1.13.1 Responsibility of the Design-Build Contractor

The D/B Contractor is responsible for this design in accordance with this RFP document. The design responsibility of the D/B Contractor is performed by the D/B Contractors Architect/Engineer firm or Designer of Record hereafter referred to as “A/E”. The A/E shall perform all Architectural and Engineering services necessary for the preparation of construction contract plans and specifications to build the facilities in this project. This includes, but is not specifically limited to, studies, investigation, analysis, calculations and design of buildings, facilities, infrastructures, systems and supporting utilities that are included in the project according to the design documents included in the contract.

The A/E is responsible for providing a corrected final design submissions to include plans and specifications and all supporting analysis for: Civil, Geotechnical, and Environmental Design, Architectural Design, Structural Design, Life Safety and Fire Protection, Mechanical, Electrical, and Communications. The plans and specifications provided shall be in accordance with the terms and conditions of this contract and as specified below. The design must comply with local laws and standards and be completed and approved by engineers authorized by law to design in Latvia.

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The D/B Contractor shall provide all labor, materials, equipment, supplies, permits, fees, and consultant services to design and construct this compound. The D/B Contractor shall develop a complete site, building and design package.

Any discrepancies found in these RFP documents by the offeror shall be identified to the Government before the submittal of the offeror’s proposal. The Design/Build Contractor, as Architect/Engineer of Record, is solely responsible for the design intent and the accuracy of the D/B Contractor’s proposal and its compliance with all RFP requirements and all referenced codes and criteria. Design drawings provided in the Government-provided RFP package are to be considered schematic in nature and are to be verified by the D/B Contractor as part of the development of the project design and construction documents.

The D/B Contractor’s design professionals shall be the designers of record for the entire project; they must take full responsibility for the design and must satisfy themselves that the design meets professional and regulatory standards.

1.13.1.1 Professional Quality, Technical Accuracy, and Coordination

The Design-Build Contractor shall be responsible for the professional quality, technical accuracy, and the coordination of all designs, specifications, drawings, and other services furnished under this contract. Work must be organized in a manner that will assure thorough coordination between various details on drawings, between the various sections of the specifications, and between the drawings and specifications. The Design-Build Contractor shall thoroughly cross-check and coordinate all work until he is professionally satisfied that no conflicts exist, vital information has not been omitted, and that indefinite language open to interpretation has been resolved.

1.13.1.2 Correction of Work

The Design-Build Contractor shall, without additional compensation, correct or revise any errors or deficiencies in its designs, drawings, specifications, and other services.

1.13.1.3 Government Oversight

The extent and character of the work to be done by the Design-Build Contractor shall be subject to the general oversight, supervision, direction, control, and review by the Contracting Officer’s Representative (COR).

1.13.1.4 Unlimited Drawing Rights

The Government shall have unlimited rights in all drawings, designs, specifications, notes and all other works developed in the performance of this contract, including the right to use same on any other Government design or construction without additional compensation to the Design-Build Contractor. The Design-Build Contractor hereby grants to the Government a paid-up license throughout the world to all such works to which he may assert or establish any claim under design patent or copyright laws.

1.13.1.5 Conflicts

Any conflicts, ambiguities, questions, or problems encountered by the Design-Build Contractor in following the criteria shall be immediately submitted in writing to the Contracting Officer’s Representative (COR) with the Design-Build Contractor's recommendations. Prior to submission to the Government the Design-Build Contractor shall take appropriate measures to obtain clarification of design criteria requirements, to acquire all pertinent design information, and to incorporate such information in the work being performed.

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1.13.1.6 Design Specialists

Whenever a design specialist is required, the Design-Build Contractor shall submit for the approval by Contracting Officer’s Representative (COR), the name of the designated specialist along with the individual's educational background, experience, and licenses or registrations held, before design work commences. The design specialists shall be registered architects, registered professional engineers, or recognized consultants with a background of at least five (5) years design experience in the appropriate specialty. Services of design specialists are required for the following specialties as required per SOW sections:

Civil (Geo-tech and surveyor) Architect Structural engineer Electrical engineer (Communications Specialist) Mechanical engineer Fire Protection Engineer

1.13.2 Conduct of Work

1.13.2.1 Performance

In the performance of contract, the Design-Build contractor shall perform the work diligently and aggressively, and promptly advise the Contracting Officer’s Representative (COR) of all significant developments.

1.13.2.2 Telephone Conversations

Prepare a summary, and promptly furnish a copy thereof to the Contracting Officer’s Representative (COR), of all telephone conversations relating to the design work under this contract.

1.13.2.3 Cooperation with Others

Cooperate fully with other firms, consultants, and contractors performing work under the project to which this contract pertains, upon being advised by the Contracting Officer that such firms or individuals have a legitimate interest in the project, have need-to-know status.

The contractor shall coordinate with the COR closely to synchronize all disciplines / work of this contract.

1.13.2.4 Technical Criteria

Project design shall be in accordance with the latest editions of the Host Nation Governmental Building Codes. In the absence of Host Nation Building Codes, the Contractor shall use the International Building Code (IBC) and/or European Codes and Technical Standards and regulations as required in this RFP. Site facilities and utility systems and material standard shall be in accordance with (but not limited to) the latest editions of the following criteria.

Host Nation Building Codes and related technical standards

In absence of Host Nation codes EU Codes and related technical Standards.

While this RFP references various source Standards and specifications, all design documents are to meet Host Nation codes and requirements. It is the designer’s responsibility to demonstrate that the Host Nation standard is

1 February 2013 Section 01010 Page 7 of 52 equal to the cited Standard or specifications being supplanted. Should conflicts occur between the criteria provided and the codes, the final design shall be based on an engineered evaluation of the conflicting codes that is accepted by the COR.

1.13.2.5 Design Submittals

All submission documents shall be in English unless stated otherwise in the General Requirements or the Technical Sections.

The contractor will be required to make a formal design submittal at final design (100%). This includes a design analysis, a complete set of drawings, calculations, and specifications at each submittal.

The contractor shall submit all documents in accordance with 01 33 00 Submittal Procedures.

Signature Requirements for Design-Build:

The D/B Contractor’s Designer of Record shall sign and seal drawings and specifications signifying completeness and ownership of their design at the 100% corrected design submittal phase and before construction starts. Sheets without seal and signature will not be accepted. The D/B Contractor shall place a “Prepared By:” statement followed by the D/B Contractor’s company name on the drawing cover sheet.

Electronic Deliverables:

The following are required electronic deliverables for all submittals as appropriate:

• Native electronic based CADD files compatible with Autodesk software.

• PDF of Drawings and Specifications

• Specification source files

• Calculations

• All Reports, Surveys and Studies

• Shop Drawings/Transmittals

• Architectural Color Boards (photos)

• Submittal Register

• Other (Photos, Project background/support files, etc.)

Drawings: All plans shall be sorted by discipline and marked as follows as appropriate:

G = Title sheet, drawing index, etc.

C = Civil L = Landscape A = Architectural S = Structural LS = Life Safety M = Mechanical (ventilation, air condition, etc.)

P = Plumbing E = Electrical FP = Fire Protection

1.14.3 Life-Span

Construction must have an expected life span of 20 years.

1.13.4 Maintainability

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Low maintenance materials and systems must be employed and shall be appropriate for the project climate and location.

1.13.5 Operability

Systems including but not necessarily limited to mechanical, electrical, communications, etc., must be simple to operate and easy to maintain. Parts shall be readily available on the local economy.

1.13.6 Standardization

The Contractor shall use standardized materials, products, equipment, and systems to minimize the requirements for replacement parts, storage facilities, and service requirements.

- End of Section -

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2.0 Civil and Geotechnical

The contractor shall provide and perform civil engineering design and construction services as required to provide a complete, accessible, functional, usable, and environmentally sustainable facility as described in this SOW.

The site will be located as shown on the attached conceptual layout. Exact locations of the facilities are to be determined in the field.

The contractor shall be responsible for obtaining all applicable permits for site clearing, digging, demolition, transport, and disposal of waste material generated by this work effort, and/or any other permits that may be required. It is the contractor’s responsibility to coordinate requirements of prior notice for start of work with the COR and keep with the determined schedule.

All standard security/safety measures will be complied with. In addition, no open fires or burning of trash will be allowed within the confines of the project site.

Any damage to structures, drainage facilities, utility lines, or other existing features on the site because of contractor operations shall be repaired, or the damaged items replaced, at the contractor's expense.

2.1 Scope

The primary works of this project include, but are not limited to:

- Design and construction of new pavement planned to be covered by the one side open section of the new ambulance maintenance/cleaning garage.

- Design and construction of new/ renewal of existent pavement to access the new ambulance maintenance/cleaning garage.

- Design and construction of a foundation slab for mounting the generator and the related fuel tank as required per electrical section of this SOW.

- Design and construction of water supply system to service the new ambulance maintenance/cleaning garage

- Design and construction of new storm drainage for the new ambulance maintenance/cleaning garage and the related pavements.

- Design and construction of new sanitary sewer system serving the cleaning bay planned to be established in the closed section of the new ambulance maintenance/cleaning garage including provision of an oil water separator and a grit chamber.

- Trenching for the installation of new underground electrical utility lines.

2.2 Site Layout

The contractor shall lay out the facility on available site based upon the layout of the existing buildings and other site structures and shall include site elements that are to be upgraded, changed and/or added by the requirements of this SOW.

A conceptual drawing for the facility is attached in the appendices showing the proposed location of the planned facilities. The conceptual drawing is not considered fully accurate with respect to existing facilities or binding with respect to new facilities. Site conditions may dictate modifications to the plan involving relocation of facilities. The

1 February 2013 Section 01010 Page 10 of 52 contractor also may propose alternates. The contractor is responsible for the validation of all aspects of the work whether they are shown on the conceptual plan or not.

2.3 Submittals

The contractor shall provide the civil design submittals after contract award in accordance with the chapter “Design Submittals” in the Section 1 of this SOW.

Site, detail, and section drawings shall be provided by the contractor as required, but shall conform to the requirements of this SOW. Construction drawings shall include but are not limited to:

- Site plan(s),

- Utility site plan(s) - may be combined with site plan if feasible.

- Demolition site plan(s).

- Landscaping site plan(s). - may be combined with site plan if feasible.

- Job site mobilization plan(s).

- Stake out and elevation plan(s) for traffic facilities (apron, walkways etc.).

- Longitudinal profiles for utility lines.

- Regular cross sections for traffic facilities (apron, walkways etc.), earthworks, and utility trenches.

- Detail and section drawings for e.g. drainage facilities etc.

Besides the above listed construction drawings the contractor shall provide at least the following documentation (Please compare with accordant requirements as per Section 1 of this SOW)

- Design Analysis for all civil construction works

- Geotechnical/ hydrological/ soil report.

- Hydraulic calculations for storm water drainage and corresponding drawings (drainage area map),

- Calculations for water supply facilities and verification of conformance with the estimated demand.

- Calculations for sewage facilities and verification of conformance with the estimated amount of discharge.

- Structural calculation / verification of appropriate construction of the pavements for the planned loads and use.

The Design Analysis shall state and list the basis of design for all project aspects and features.

All calculations and verifications are to be conducted and documented by the contractor in compliance with the applicable codes and criteria. Other calculation / verification are to be provided as required.

The contractor shall provide As-Built plans for site layout, grading and elevations, utility lines and landscaping for all new or modified work. Contractor shall also provide detail plans for any site features constructed or modified, e.g. walls, manholes, pavements, ramps, etc. and also for any features special to the nature of the proposed use of the finished site.

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2.4 Permits and Coordination with Local Authorities

The contractor is responsible for making all applications and obtaining required reviews, permits, inspections and approvals from the local authorities, and is responsible for payment of any associated fees or charges.

2.5 Codes and Criteria

See Section 1.

2.6 Materials

If not specified otherwise, all materials and products shall be durable, heavy-duty industry standards and be readily available on the local market to include spare parts.

The contractor shall submit product and manufacturer information for all materials and products proposed / provided for this project.

Any material or construction that does not meet the requirements of this SOW shall be submitted to the COR for review. If not accepted by the COR the material shall be removed and replaced at the contractor’s expense.

2.7 Site Survey.

The contractor shall perform a topographic survey as well as a drainage survey of the project site. The survey shall include location, elevation, and specification of all existent site features within the project limits. This includes but is not limited to existing buildings, roadways, fences, walkways, landscaping, site facilities, utilities, and utility line structures, landscaping features like trees and shrubbery or site furnishing. The contractor shall provide site survey documentation in compliance with the applicable standards.

Any drawings showing existing conditions obtained at the bases shall be field-verified by the surveyor before being used.

Upon completion of construction, the original survey shall be updated with an as-built survey of the site as constructed. The as-built survey shall be submitted the COR.

2.8 Civil Construction

2.8.1 Mobilization

The contractor shall provide mobilization and demobilization of all vehicles, material, and equipment to the project area. The contractor shall prepare the site and perform all necessary preparatory work for digging and excavation.

It will be the responsibility of the contractor to coordinate with the relevant stakeholder like local authorities, the facility, or any other agency to ensure that the site is accessible.

2.8.2 Clearing and Grubbing

The contractor shall be responsible for any clearing and grubbing of the immediate site and shall provide fully functional facilities as described in this document.

Any plants that are required to be removed shall be removed according to the local regulations. This includes any required replacing, replanting, and reseeding the site at the contractor’s expense.

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All debris generated during clearing and grubbing operations shall be removed from the project site in compliance with the determinations in the following chapter.

The contractor shall clearly mark the project boundaries before starting construction work.

2.8.3 Demolition and Removal

Site demolitions for this project should be minimal. Demolition and removal work includes, but is not limited to, removal of one (1) lamp pole in the area of the new ambulance maintenance/cleaning garage, trench excavation, spoil materials, rubbish piles, spent construction related materials and material canisters, asphalt and/or concrete pavements, and other miscellaneous debris.

Any structures, utility or landscaping to be demolished shall be shown on the demolition site plan.

The contractor shall disconnect utility lines (as required) before the commencement of demolition work. The contractor shall coordinate all utility closures and disruptions with the COR. Utilities shall be properly capped, plugged, or abandoned in place.

Existing utilities that interfere with this project will be relocated so that they do not interfere with the proposed construction activities. Where relocation of utility lines is not possible, the contractor must ensure that they are adequately secured to ensure uninterrupted services to the other buildings.

All debris generated during demolition as well as all construction debris and excess soil/rock/topsoil or any discarded material/equipment/furnishing left on the project site shall be the property of the contractor and shall be removed from the project site and properly disposed of by the contractor in accordance with host nation requirements. Demolition material during tree and shrub removal includes the trunk, branches, root stumps, and other associated plant material.

The contractor shall be responsible for all applicable permits for transport and disposal of waste material generated by this work effort. The dumps for uncontaminated demolition material shall be official disposal sites determined by the contractor. The contractor shall be responsible for meeting the requirements of the disposal site authorities regarding the material delivered and for paying of any dumping fees. The contractor shall also provide the COR with documentation verifying the material has properly disposed.

2.8.4 Hazardous Materials and Contamination

Currently there are no known hazardous materials or site contamination affecting the exterior (site improvements) phase of the required work. However, there may be a possibility that materials to be removed may contain contaminants.

If hazardous materials are found to exist, the Contractor shall immediately notify the COR, cease work in the area, and secure the site. The Contractor shall take precautions to protect the site from surface run-off and precipitation, and prevent leaching of any hazardous or contaminated material in the surrounding area.

If contaminated soils are encountered during excavation activities, the contractor shall remove only as much contaminated soil as is necessary for facility construction. Contractor will not be responsible for removing and remediating soils found to be contaminated that are outside of the immediate project excavation limits.

The contractor will be responsible for complying with all applicable host nation regulations in regard to identification, removal, and disposal of hazardous materials as part of this work effort. Results of sampling and testing shall be forwarded to the COR, together with recommendations on proposed method of disposal or treatment, and any need for further testing.

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A certificate verifying that disposal was performed satisfactorily with respect to applicable regulations and ordinances shall be presented to the COR.

2.8.5 Site Grading

Minimal site grading is anticipated. Site grading shall be designed to maintain the general grade, elevations, and drainage patterns of the current site. The proposed site grading shall be developed to minimize the amount of earthwork required.

Positive site drainage shall be established making sure that surface water does not collect in the vicinity of the buildings. Finished soil grades outside the buildings shall have a minimum of 5.0% slope away from all exterior walls for the first 3 meters and positive drainage thereafter. If adequate sheet flow away from the buildings is not feasible, appropriate drainage features are to be planned in compliance with the local standards to keep surface water away from the exterior walls.

The difference in grade between equipment pad elevations and the ground immediately adjacent to the pads shall be a minimum of 150mm. Ground surrounding the pads shall have a minimum 5.0% slope away from the pads for the first 3 meters where possible.

The contractor shall design appropriate grades to provide required drainage for pavements. Provide smooth transitions of finish grades between new and existing pavements.

The contractor shall be responsible for dewatering necessary for grading, trenching, and all other subsurface work for the construction of the Project.

2.8.6 Earthwork

The contractor shall perform all earthworks necessary for proper foundation of the facilities, for placing new utility lines, storm water trenches, and swales and for providing compatible pavement elevations and slopes as required.

The contractor is responsible for defining all necessary earthwork requirements in the contractor’s geotechnical report and the contractor’s specifications (see geotechnical section of this RFP). Compaction under building foundations, pavements, and utility lines shall be at least 95% of maximum density. Soil compaction tests shall be performed in accordance with the specifications indicated in the contractor’s geotechnical report in compliance with local criteria.

All excavated material satisfactory for reuse shall be transported to and placed in fill or embankment within the limits of the site work. Surplus excavated material not required for fill or embankment (as determined by the COR) shall be disposed of offsite, and shall be the responsibility of the contractor.

During construction, excavation and fill shall be performed in a manner and sequence that shall provide proper drainage at all times. Excavation for the foundation footings shall be designed as determined by the geotechnical report.

2.8.7 Pavements

2.8.7.1 General

All new pavement layout and construction shall comply with the applicable criteria for layout and construction of roadways, circulation drives, and vehicle parking or of any other traffic facilities as well as with applicable traffic studies, if present and with the structural requirements as per structural section of this SOW.

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Contractor’s geometric and structural design of new or temporary pavement and its construction shall generally consider the types of vehicles traversing and parking on the planned pavements and their proposed amount of traffic.

If not stated otherwise in this SOW, all pavement construction and design shall accommodate minimum the largest and heaviest ambulance vehicle(s) planned to be used by the medical service. Required information about this vehicle or and any other vehicles that are to be considered in coordination with the user and the COR shall be obtained from the user. Other vehicles may include passenger cars, utility vehicles, trucks, emergency vehicles, garbage trucks, fire trucks, and delivery vehicles. The contractor shall demonstrate by graphical means, i.e. by indication of the relevant vehicle’s turning paths in the site plans, that the geometric pavement layout accommodates the required driving maneuvers of the design vehicles.

The contractor shall design and build the pavement construction in compliance with the applicable standards and in consideration of the results and recommendations of the geotechnical survey and the determined loads. Minimum values for the structural design of the pavements as per Structural section of this SOW are to be observed. It is the contractor’s responsibility to design and implement any soil replacement or improvement required to obtain pavement construction compliant to the applicable standards and the determined loads. The contractor is free in choice of methods, equipment and materials required to implement the needed soil improvements as long as all applicable standards are fulfilled and no recycling material is used if not approved by the COR. Pavements shall have a sufficient cross slope to properly drain run-off water.

Existing pavement and curbs shall be demolished as needed. Any pavement that is to be temporarily replaced (e.g.

due to utility trench construction) or that has been damaged during construction works, etc. shall be replaced with type and thickness identical to that of the existing pavement. The area to be replaced shall extend as far as is necessary to fully replace not only visually damaged roadway, but also damage caused during construction that cannot be seen.

Connections of new or replaced pavement with existent or other new pavement shall be designed and constructed in compliance with the applicable standards and regulations.

The contractor shall perform control tests like compaction tests, pavement density tests, thickness and evenness tests etc. on all pavement base and surface courses in accordance with local codes and in consideration of the requirements specified in the contractor’s geotechnical report. The location of all tests shall be selected by the COR, and copies of all test results shall be furnished to the COR.

The contractor shall provide traffic control signage and pavement markings to allow for safe traffic control and routing per requirements of the facility and per national standards. Road signs shall be light reflecting.

2.8.7.2 Pavement provided for the new ambulance maintenance/cleaning garage

The pavement required to access the new ambulance maintenance/cleaning garage and the pavement inside of the one-side-open section of that garage shall be of the same type and construction and shall comply with the operational requirements of the new garage. Besides providing sufficient space to drive in and park the ambulance vehicles, the pavement shall accommodate all other vehicles required to use it like e.g. trucks that may need to encroach on the new pavement in front of the garage for turning maneuvers inside the existent yard.

The contractor shall coordinate with the user for other vehicles expected to use the pavement and determine all other additional requirements deriving from the operational concept of the facility.

The surface of the new pavement in front of the garage shall be set flush with

- the final elevations of the connected floor of the maintenance and washing section of the garage, 1 February 2013 Section 01010 Page 15 of 52

- the new, same pavement inside the open section of the garage and

- the existent pavement surfaces.

Construction works include the renewal of the existent pavement connecting to the new pavement as far as needed to provide proper, secure, and sustainable access to the new garage.

Contractor shall ensure that proper drainage and slope of the pavement occurs such that there is no pooling or ponding. Run-off water shall drain as described in the drainage section of this SOW.

2.8.7.3 New concrete pad for generator and fuel tank placement.

The contractor shall design and construct a concrete pad to accommodate the installation of the required generator and the belonging above ground fuel tank. The pad shall be constructed according to the structural requirements as per structural section of this SOW.

Location shall be chosen by the contractor to match all operational requirements of the facility and to allow for proper truck access for maintenance of the generator/fuel tank and for fuel delivery. Minimum size of the pad shall be 5 meters by 2 meters. Supports for emplacement of the generators are to be delivered and installed together with the generators and need to comply with the estimated load-bearing capacity.

Secondary containment in compliance with the applicable standards is to be provided either included in the provided generator and fuel tank or by accordant construction of the concrete pad.

2.8.8 Storm Drainage

The contractor shall provide appropriate amendment of the existent storm drainage system for the site assuring safe discharge and proper economical and ecological treatment of storm water run-off in compliance with the applicable codes and standards.

The amended drainage system shall maintain the existent site drainage up to the maximum possible extent. The amount of additionally discharged storm water run-off shall be minimized as much as possible by provision of low environmental impact measures like infiltration swales/ basins or equal practices but still providing complete reliability of the storm water system in regard of safety, sustainability and functionality of all buildings and facilities.

It is the contractor’s responsibility to provide such features in compliance with the applicable host nation laws and standards and in coordination with the facility and the COR.

Preferred method for directing storm water away from buildings, pavements or other facilities shall be surface drainage including but not limited to swales, trenches, or sufficient grading for sheet flow (see “site grading” section of this SOW). Design and construction of surface drainage shall consider possible erosion issues as well as prevention of standing water under normal conditions.

Provision of technical features for surface drainage like lining of culverts, trenches, and swales with concrete or similar material etc. shall be minimized as much as feasible. Nevertheless, channels shall be designed for long-term stability under design flow conditions, which may also include provision of energy dissipaters, rip rap scour protection, ditch blocks or weirs, and inlets to maintain the systems in a stable configuration under operating conditions.

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Underground drainage features like sewers, inlets, box gutters, manholes, tanks or other subsurface installations shall only be planned and constructed where required due to functional ecological, economical, or other comprehensible constraints.

All drainage shall be provided by gravity flow.

Overflow provisions shall be provided as required to prevent flooding of buildings and primary roadways.

The contractor is required to establish the reliability, safety, sustainability, and functionality of the newly planned drainage system in compliance with the applicable standards. The contractor shall provide hydraulic calculations for all new drainage features based upon the design rainfall applicable for the region of Riga, which is to be obtained, by the contractor from the local / host nation water authorities. The contractor’s verification of the drainage system shall consider run-off from contributing drainage areas outside of the site as well as capacities or allowed discharge volumes of existent drainage systems or watercourses that are utilized for recipient.

Capacities of the existent system and allowed discharge volumes are to be obtained by the contractor from the facility and the relevant water authorities or are to be estimated as required per local standards if applicable. It is the contractor’s responsibility to obtain contributing discharge from areas outside of the side either by using data obtained from the relevant water authorities or by performing own survey and estimations.

For bidding purpose, the contractor shall assume that the newly planned storm drainage can be connected to the existent system in close vicinity of maximum 40 m. The definite connection point is to be coordinated with the facility and the COR.

The Contractor shall accomplish all required field inspections for quality control of the storm drainage system including video inspection of sewer lines. The COR shall be notified of accordant inspections and be provided with the results. Testing procedures and requirements shall comply with base and local drainage authority requirements.

The contractor shall coordinate with the local drainage authority for required inspections and pay associated fees.

Upon completion of construction, the contractor shall prepare and submit to the COR As-Built drawings showing the exact location of all outdoor sewer lines within the area of the construction site.

2.8.8.1 Minimum construction requirements

Construction requirements provided in this section are minimum requirements that may be superseded by applicable host nation standards and requirements. It is the definitely the contractor’s responsibility to provide host nation standard compliant layout and construction of the storm drainage features.

- Minimum slopes across finished surfaces shall be one percent (1.0%).

- Minimum slopes in swale centerlines shall be 0.5 percent (0.5%)

- Maximum longitudinal slopes in swales shall be 4 percent (4.0%).

- Maximum swale side slopes shall be 1V: 4H and maximum swale depth shall be 0.6 meters.

- Minimum cross slopes in roads shall be 2.0%; maximum cross slopes shall be 3.0%.

- Sewer systems shall be designed for a minimum of a 10-year storm frequency, and pipes shall be sized for full flow.

- The minimum velocity of flow in conduits during a design storm shall be 1 m/s.

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- The pipe capacity shall be determined so that the calculated hydraulic grade line of the storm sewer drainage system(s) shall not exceed 0.3 m above the crown of the pipe or the finished site grades when special approval is obtained

- Culverts and storm piping shall be reinforced concrete having a minimum diameter of 380mm unless approval is obtained otherwise.

2.8.9 Utilities

There are several utilities crossing the project’s construction site. It is the contractor’s responsibility to obtain accordant maps from the relevant authorities and owners and to verify the existing conditions on site. The contractor shall take action in accordance with section 2.8.3 in case of existent utilities interfering with the construction works required for this project.

The COR shall be notified of any utility lines that are found to be missing from or incorrectly shown on any existing plans showing existing conditions that were made available to the contractor. Indication of existing utility lines on such plans shall not mean the existence, location, depth and/or alignment of the lines is accurately represented.

The contractor is responsible for the protection of those lines that are to be kept in operation. If utilities are damaged by the contractor, it shall be at the contractor’s expense

New collector utility lines shall not be located within 3 meters of the footprint of any existing or future building on the site. Placement of a buried utility main (new or existing) under a new structure shall not be allowed. Existing lines shall be relocated as necessary to comply with the above requirements.

Any required utility relocation shall be designed and constructed in compliance with the applicable Host Nation Standards and in consideration of additional owner specific requirements.

2.8.9.1 Utility Trenches

Provide utility trenches for all required underground utilities to a frost-free depth. Utilities shall lie far enough below the surface so as not to be damaged by the expected vehicular/pedestrian traffic passing over that area. This shall be designed in accordance with the Applicable Design and Construction Documents Section of these SOW. Pipe depths, bedding, and cover shall be as required by appropriate local criteria. Warning tape shall be placed above each new/relocated utility line, 30 cm below finished grade. Trench backfill shall be with appropriate compactable soil materials and shall be compacted in layers of about 30cm each to at least 95% maximum density. Density tests shall be conducted by the contractor in accordance with the technical specifications. As a minimum, tests shall be conducted for 1 per 200 square meters. The COR shall be notified before backfilling of pits and trenches is going to be performed.

Only gravelly and sandy non-cohesive materials shall be considered satisfactory for fill and backfill, with the provisos 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 frozen nor contaminated, and the soil contains neither trash, debris nor organic material.

Other more cohesive soil types (with the same restrictions regarding particle size, etc.) may be used in green areas, however not beneath structures or pavements. 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.

The COR has the right to require that sheeting be improved if the sheeting measures provided by the contractor are deemed insufficient in terms of safety. This improvement shall be at the contractor's cost if the original contractor's measures did not meet the requirements of applicable safety criteria.

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The COR shall be notified before removal of sheeting after construction pit work or trenching is going to be performed.

The contractor shall replace any pavement that has been demoed for utility trench construction in type and kind as the existent pavement (see Pavement section of this SOW).

2.8.9.2 Buried Electrical Utilities

Where proposed electrical utilities cross existing or proposed ditches, the cables shall be buried to a minimum depth below the ditch/swale bottom as required by the Applicable Design and Construction Documents Section of this SOW and in conjunction with the electrical portion of this SOW. Where cables are required to cross concrete walls or fencing, cables shall be installed in a steel conduit. Alternately, if the wall depth provides sufficient cover (1 m minimum) for the cables, walls may be cored and fitted with a PVC sleeve to allow passage of cables through the wall sections.

2.8.9.3 Waste water system

Required waste water system for the facility shall include inlets, box gutters, or equal systems to catch wastewater deriving from maintenance and other operations performed in the closed maintenance and washing section of the new ambulance maintenance/cleaning garage. The system shall furthermore include wastewater piping, an oil/water separator and a grit chamber for further waste water treatment. Since no latrine facilities are planned for the garage, no black water generation is to be considered.

The new waste water system shall tie into the closest sewer of the facility’s existent waste water system providing sufficient invert height and capacity to accept the wastewater amount deriving from the new ambulance maintenance/cleaning garage.

The definite connection point is to be coordinated with the facility and the COR. For bidding purposes, a distance of maximum 40 m shall be proposed for the location of the connection point.

All wastewater drainage shall be provided by gravity flow. It is the contractor’s responsibility to verify the constraints required for proper connection to the existent sewer system.

The contractor shall dimension and design the waste water system in compliance with all applicable codes and standards considering economical operation of the system based on the needs of the facility and other constraints that are to be coordinated by the contractor with the customer/user and the COR.

The contractor shall provide hydraulic calculations for all elements of the waste water system in compliance with the applicable standards.

2.8.9.3.1 Oil/ Water Separator

The Contractor will provide an Oil/ Water Separator with a capacity sufficient for water originating from ambulance vehicle cleaning or other operations planned inside the closed maintenance and washing section of the new ambulance maintenance/cleaning garage. Construction, layout, and installed fixtures of the oil/water separator shall comply with the applicable host nation standards. Effluent from the oil water separator will be discharged into the existent wastewater sewer system via wastewater piping. The contractor shall take care for proper ventilation, easy cleanout and easy maintenance e.g. in case of blockages.

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2.8.9.3.2 Waste water Piping

Gravity system shall be planned and constructed for all wastewater…