SOW-Tower_Gorgona-REV1.pdf

Metallic Radar Tower Gorgona SAQMMA-16-R-508 INL Colombia

A/LM/AQM/IP 1

STATEMENT OF WORK (SOW)

SOLICITATION No. SAQMMA-16-R-0508

SECTION C- DESCRIPTION/SPECIFICATION/SOW

INTERNATIONAL NARCOTICS AND LAW ENFORCEMENT (INL)

METALLIC RADAR TOWER IN GORGONA ISLAND

AUGUST, 2016

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GENERAL DESCRIPTION OF THE PROJECT

The following are the main characteristics of the work to execute at the Colombian National Natural Park located at Gorgona, Guapi, Cauca along the Pacific coast.

The works include, but are not limited to, the construction of one (1) 55 m high metallic towers including concrete foundation, and a pre-fabricated HVAC shelter. The works include the necessary activities for the energy supply to the shelter and communications equipment, the obstruction lights of the tower and the grounding and lightning protection systems.

It is understood that the Contractor shall verify the measurements and become familiar with the terrain and the existing conditions before sending his quotation. In this statement of work, guide measures are given for the Contractor to check the drawings and the construction quantities chart and to check the physical conditions on site. In no way do these figures commit the US Government to pay additional amounts if the resulting measurements on site vary from the information given by the US Government.

For the structural, mechanical and the electrical and grounding and lightning protection installations, the Contractor shall supply maintenance and inspection manuals for routine activities with recommendations for the inspection and maintenance.

GENERAL BUILDING REGULATIONS

The Contractor shall make the applicable verifications in order to certify the designs given to them to be adequate for this installation and shall guarantee the correct execution of the works, fulfilling the standards of the applicable codes before the start of the construction process.

The contractor shall give careful attention to the following recommendations.

1. The contractor shall provide all necessary tools, mechanical implements and vertical and horizontal transportation necessary for the proper work execution.

2. Temporary water, electricity and telephone facilities shall be at the contractor expense.

3. Elements and materials to be used on the construction shall be previously approved by the US

Government representative by Submittal technical cards, samples or laboratory results, 15 days calendar before the material is required on the work. Also, necessary tests may be ordered by the contractor to ensure that these tests are consistent with specifications.

4. Storage sites, camps and utilities shall be at contractor expense. Other temporary buildings considered necessary for the proper works development shall be also at contractor expense. Their location shall be approved by the US Government representative.

5. As soon as the construction works are finished and prior to contract closed, the contractor shall remove all temporary constructions and excess material. The camps shall be thoroughly cleaned to the former conditions prior to undertaken construction works.

6. These specifications include ICONTEC, ACI Building Regulations, Seism resistant Construction Regulations NSR-10 (Act 100 of 1997, Act 1229 of 2008 and resolution issued by Standing Advisory commission of Seism Resistant Construction regime from National Government) ASIM, CHEC, RAS 2000 Regulation of safe drinking water and basic quality, Technical Regulations of Electrical Installations (RETIE in Spanish) as pit as the manufacturer recommendations for installation and use of their products.

7. The contractor shall assume the protection and preservation of the works until it is definitely delivered or received by the US Government representative. If reparation is needed; it shall be at the contractor expense and in accordance with the US Government representative.

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8. The prices shall include the cost of materials, labor, tools, equipment, transportation, quality control testing. Other elements and expenses necessary are also included for suitable execute of the contract as pit as indirect and financial costs.

9. If damages to third parties occur due to lack of foresight, careless or negligence, attributable to the contractor, this one shall be liable for any damage.

10. The US Government representative shall be demanding about works finishing and construction.

Therefore, the contractor shall use high-quality materials and high-qualified labor. The US Government representative shall reserve the right of approval or refuse of any work if they consider the work does not comply with the regulations issued on these specifications.

11. Helmet, gloves, glasses, foundations, belts or any other necessary element required by the US Government representative shall be at the contractor expense. During the work, first-aid elements shall be available and fulfill all the labor safe regulations included on Colombian Acts.

12. Trademarks, trade names or manufacturers stated on the drawings or specifications are set out as reference for high-quality of required material. The contractor may propose other product names to the US Government representative in order to be approved, when these are considered equal or better in quality and comply with the regulations set out on these specifications. This shall not entail cost variation.

13. To start any operation, the contractor shall carry out tests clearly indicating the construction process to obtain the Government or representative approval.

14. Guard: facilities, stores, equipment, tools and other elements guard shall be provided by the contractor before and after their installation, until the work is finally received.

15. The Contractor shall guarantee that the project fulfill all the rules of the Ministerio del Medio Ambiente and the Departamento Administrativo de la Aeronáutica Civil.

PARTICULAR WORK CONDITIONS

Laboratory Tests The contractor shall be responsible for all laboratory expenses. The laboratory shall be previously authorized by the US Government representative. The contractor shall include testing of laboratory samples. The results shall be delivered directly to the US Government representative. Its cost shall be included as part of the contractor proposal.

Construction Procedures The execution procedures execution on the actual work shall be subject to the contractor initiative in accordance with technical specifications stated on this solicitation for proposal comparison purposes and referred to engineering practice. The contractor shall be ultimately responsible for the application of such procedures which shall aim at obtain the best results in the completion of the work. However, the US Government shall, at any time, have the right of ordering changes to the used procedures for safety purposes and percentage of completion method, its coordination with the works of other contractors related to this one or for requiring the contractor to adjust to the actual contract.

Unauthorized or Defective Work If the actual work does not fulfill the specifications or the US Government instructions, it shall be considered defective. So in this case corrective actions shall be ordered and it shall not be accepted; completed work shall not be measured or paid before the necessary alignments and levels are met. The same is applied to any unauthorized work by the US Government representative and shall be corrected by the Contractor. The Contractor shall not have right to receive any compensation for not acceptable work.

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Damage to the Executed Work and Third Parties The Contractor shall take full responsibility for all executed work until the project is completed and finally approved. The Contractor shall also take full responsibility for any damage caused to third parties during the execution of construction work. If this is the case, The Contractor shall repair the damage at his expense without additional work or any exception to such responsibilities or to the agreed completion date.

Materials The contractor shall include new materials and of first quality design for prolong use and heavy duty. The contractor shall assure good materials and excellent finishes. All the colors and finishes shall be submitted to the US Government representative for approval prior to purchase and installation.

In order to guarantee a normal work progress and to avoid any possible lack of materials or un-necessary high-quality elements, the contractor shall provide on a timely manner all the required materials to the construction site and permanently keep the necessary stock of material on site. The US Government representative shall have the right to reject material or used elements if they do not comply with specifications and construction standards.

The material rejected shall be removed from the construction site and shall be replaced by an approved material.

The defective work shall be corrected satisfactorily without additional cost to the US Government. If verifications to the general material specifications in accordance with the specifications and construction standards are required by The US Government, the contractor is required to carry out all necessary tests at its expense without implying additional cost to the US Government. Once contract is awarded and if the US Government representative considers it necessary, the Contractor shall deliver the supply schedule of the equipment and materials to the project site.

The contractor shall leave on site a stock of materials like bulbs, fuses, terminals or pipes that have been fitted, representing three (3) % of the total quantity, for future maintenance purposes. These items shall be handed over duly packed, identified and listed.

Equipment The Contractor shall include in his proposal the equipment depreciation and maintenance, as well as all operational, parking, insurance, etc., expenses. The contractor shall also consider having an appropriate amount of equipment in good condition and approved by the US Government representative. This way delays or interruptions due to equipment damage can be avoided. Equipment in Bad conditions, deficiently maintained or damaged shall not be a cause to avoid any contractual obligation. The US Government representative may at any time during the execution of the contract demand the removal from the project site of any equipment or tool that is considered to be defective or not recommended to be used. The Contractor shall replace, as soon as possible, the equipment to be removed by damage or maintenance in order not to delay work.

Site Personnel All of the onsite personnel shall be directly hired by the Contractor. The Contractor personnel shall not have any labor links with the US Government. Therefore wages, compensation payments, bonuses and social benefits to which the employee are entitled to shall be at the Contractor expense, in accordance with what the Colombian labor law demand.

Signaling The contractor shall take all necessary cautions to prevent accidents from occurring during the construction process and specially those which can alter the normal vehicular and pedestrian traffic. The contractor shall comply with the necessary construction general standards.

The contractor shall install on site all the necessary warning signaling to prevent accidents during the daily activities and also at night, in accordance with the amount, type, extension, shape, class, color and distances

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required in accordance with the construction general standards or as recommended by the US Government representative.

Any accident caused by the lack of such warning signals shall be the responsibility of the contractor. The US Government representative shall, at any time, order the partial or total work suspension if systemic breach by the contractor occurs to carry out the signaling requirement or instruction given in this respect.

If work shall be performed without enough natural light, the contractor shall supply proper illumination according to the type of work to be executed. If the illumination is not appropriate to the type of work, the US Government representative shall order the suspension of work until the contractor provide the adequate safety conditions. Dragged cord extensions, dangerously hanging or cables poorly connected or insulated shall not be allowed in the project site. Fluorescent warnings and required flickering lights shall be placed to a proper distance from the work site.

The contractor shall be responsible for any expenses generated by the supply and installation of signaling as well as for the implementation of all necessary caution measures in order to prevent accidents.

Distinctive Insignias and safety of Personnel The contractor personnel shall be equipped with an overall of the same design and color, or long pants and T-shirt with sleeves of the same type and color, boots, hardhats, gloves and any security elements required for their particular activity, such as face masks or shields, gloves, boots, ear plugs, etc. Use of these items at the work site is mandatory. Likewise, each employee shall wear a laminated recent photo identity card indicating his/her name and identification card number, position, and contractor name.

Prior to initiation of the work, a list of personnel to be employed at the site shall be submitted for review to be able to obtain access to work area, including full names, identification card numbers, place and date of birth, home address and, in some cases, a government valid certificate of good conduct and photographs. The US Government and the Navy Base shall reserve the right to admit or withdraw personnel from the work site for reasons of security and/or due to the quality of the work.

The Contractor shall supply, to the US Government representative the complete and correct information regarding the affiliations to general health system and pension funds. The contractor shall also be responsible for the vigilance and execution of the occupational health program in accordance with the stated on current regulations. The Contractor shall take the responsibility for any risks shall be present in the working environment and adopt the necessary cautions to reduce such risks (Decree 1295/94).

Prevention of Accidents and Safety Measures The contractor shall, at any time during the execution of the project, provide the necessary resources to ensure hygiene, quality and safety facilities to all employees, workers, and subcontractors. The contractor shall as well provide training to its employees, workers, subcontractors, providers and to all persons related to the contract execution, on the compliment of all conditions related to hygiene, safety, quality, and prevention of accidents and the actual safety measures, as stated on the proposed safety plan.

The contractor shall be responsible for any accident that may occur on the project site not only to his personnel but also to subcontractors or third parties caused by negligence or careless through the project execution. The Contractor shall also be responsible for ensuring that their personnel as well as their subcontractors take the necessary cautions or safety measures to prevent accidents.

During the contract execution, the contractor shall fulfill all the regulations under its jurisdiction to be executed on the contract. The regulations are related to safety, accidents prevention, occupational disease, hygiene and quality and general regulations.

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Prior to initiating the contract, the contractor shall prepare a complete safety plan with all the necessary measures to be taken during the works execution, which shall be submitted for approval to the US Government representative.

If the contractor does not satisfactorily comply with hygiene or safety requirements or with the US Government recommendations, the Contractor may be subject to a partial or total suspension of work by the US Government representative. In this regards the contractor shall not have the right to demand a time extension and shall be subject to penalties for this concept.

In case that the US Government representative detects imminent danger to personnel, work or goods, the US Government representative may omit the written notification and shall demand that corrective measures be taken immediately. In these cases, the contractor shall not have the right to any monetary recognition or compensation.

Cleaning and Debris Removal The contractor shall keep personnel cleaning the construction site and nearby zones daily. The unit prices for all items, without exception, include the costs of cleaning up, loading and removal of all materials resulting from the building work. The contractor shall take these materials to an authorized dump, where the interests of the base, third parties and the environment shall not be affected (the contractor shall follow the parameters established in Resolution 541/94 and the subsequent that modify it). Material from excavations shall be deposited in such a way as to avoid blocking the entrance to the site at all times or occupying public roads while the material is being loaded into trucks for removal.

Site Description The contractor before beginning preliminary works shall complete a site description with photographs and an account of the actual conditions of roads, sidewalks, surrounding buildings, etc., this report shall be signed by the commander and contractor. This report is for the purpose documenting the actual status of the area before the work is performed. This report will be used to compare the site after the work is finished. Three identical copies must be furnished: one for the user (Colombian National Police), one for the contractor, and the other one for the US Government. If the Contractor caused any damage to the work site or other private or public property he/she shall do all the repairs prior to the contract closeout; these repairs are without cost to the US Government.

At the end of the projects a closing review and memorandum should be done with the participants, a signed copy shall be furnished in the final report.

Submittals The contractor before beginning preliminary works shall provide a submittal register to be approved by the COR, this will include all the information to be submitted to the government to include but not limited to product data, shop drawings, testing certificates, administrative information, schedules, Personnel information and qualification certificates, Field samples, closeout information etc. Once approved by the COR the contractor shall submit each of the items in the submittal register for review and acceptance by the government.

Implement temporary license for Project Management Software The contractor shall obtain licenses to access the INL project management platform that consists of two modules, the Contract Manager module for documentation management and the P6 module for Scheduling Management. The Contractor can obtain these licenses by contacting the service provider and obtaining licensing from:

COLOMBEIA:

Telephone: (+57 1) 7432031 Bogota, Colombia

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It shall be the contractor responsibility to update and maintain all project information in the system as per this specification and COR instructions including but not limited to:

Drawings Specifications Quality Assurance Documents Communications Daily and Weekly Reports Stakeholders Contact Information Base and Revised Schedules Submittal Register Activity Progress Issues and RFIs Bonding Progress Payments Closeout Documentation Other Information as Requested by the COR

GENERAL BUILDING REGULATIONS

The work shall be executed in accordance with the general building specifications stated on the Colombian Seism resistant building regulation NSR-10 (400 act of 1997, act 1229 of 2008 and resolution published by permanent commission of seism resistant construction by the National Government) and the particular specifications. The general specifications are part of the documents present on this contract. The particular specifications take precedence over the general ones. Where specific regulations are not stated, the materials, the equipment, the testes and supplied work by the contractor shall comply with the requirements of applicable regulations mentioned below:

• NSR-10 The Colombian Seism Resistant building regulation.

• INCONTEC (the Colombian technical standards institute)

• ICPC (the Colombian institute of cement producers)

• ASTM American Society for Testing and Materials

• AISC American Institute of Steel Construction

• ACI American Concrete Institute

• RAS 2000 Local Health and Safety standards for drinking water.

• RETILAP Technical Regulations for public lighting.

• NEC National Electrical Code.

• ANSI American National Standards Institute.

The requirements here stated shall be seen as a basic guide, not a limitation for the work scope.

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PARTICULAR SPECIFICATIONS –BASE CONTRACT

1) RADAR TOWER GORGONA

1.01) General Requirements

1.01.01) Provisional installations The Contractor shall submit a drawing with location of the camp, fencing of the construction site and temporary services (water, energy, telephone, etc.), before starting its installation, for the approval of the US Government representative. All the installations shall be removed by the Contractor with the approval of the US Government representative when the works are finished. The site shall be left as it was found before the start of the constructions, with grass, sidewalks, etc. This removal, along with the installation shall be quoted at a global price and shall be included in the total cost of the project.

Provisional services: the eventual supply of any service by the final user to the Contractor shall not be a conditioned help and its eventual suspension shall not give place to any claim by the Contractor. The Contractor shall provide alternative services for these situations.

1.01.02) Security of the construction site The Contractor shall supply the services of security of the construction site and the camps. The US Government and the final user shall not be responsible for the payment of the security services nor for the elements left at the construction site.

1.01.03) Temporary Facilities The Contractor shall construct a temporary camp using materials such as wood or galvanized sheet and cement-fiber tile, which conforms the material storage places, personnel dressing rooms, office and bathrooms. The location of this campsite shall be in a place coordinated by the contractor, the commander of the Navy base and US government representative. After the work has been completed, the Contractor shall leave the as it was found before the start of the constructions, with grass, sidewalks, etc.

1.01.04) Provisional fencing The work site shall be completely isolated from zones or roads surrounding the same. Similarly, if a materials storage area is built, this shall be fenced off in the same manner. A fence shall be built for this purpose, consisting of synthetic canvas with wooden posts every two meters, kept taut by means of wires at the top, middle and bottom. Props shall be fitted either side of the access door or whenever there is a change of direction.

This fence shall have one access point only, a double door through which machinery, vehicles and personnel shall enter. While the works are in progress, the contractor shall ensure that the fence is maintained and repaired, so that it is always in suitable condition.

1.01.05) Location and layout This item refers to the use of precision topographical instruments and pursuant to the architectural distribution, the draw up of the ground plan for each of the elements to be constructed. The area to be constructed is that indicated in the plans, plus the extra widths and the utilities connections. The Contractor shall use a qualified professional to perform this activity, who shall determine the levels in addition to the ground plan. Everything shall be bench-marked on securely anchored wooden bridges.

The contractor shall supply all materials required to establish the planimetric and altimetric benchmarks, such as stakes and field books, etc. The US Government representative shall review the location of the axes, but this does not exonerate the contractor from his responsibility for errors in locating or leveling any portion of the work. Prior to locating and laying out the work, the necessary datum or tie points, both horizontal and vertical, as well as the boundaries of the terrain to be occupied shall be defined and approved.

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The temporary BM and reference axes shall be placed at sites where they do not interfere with the execution of the work and that does not need to be moved, in order to allow their subsequent control at any point during the course of the work. No marks made with paint of any type, scratches, nails, centering, etc. shall be permitted on any current building or structure. Once the layout is complete, the contractor shall submit a scheme for approval, including the location of existing structures and vegetation.

1.01.06) Removal of surface layer This includes the area shown in the drawings as the areas to be built plus an additional area of one (1) meter wide in the perimeter. This operation shall be made by manual means taking care not to move the points of reference previously established on site. This way, the removal of the surface layer shall be made in a thickness that can vary from 0 to 0.50 m, until completely eliminate the vegetation layer, the organic material and other unwanted materials deposited in the soil.

This operation shall not be limited to the removal of the surface layer. It shall include the removal of roots and other objects that according to the COR´s judgement are not convenient for the development of the works. In this activity square pieces of grass shall be removed in good shape in order to use them again. These pieces of grass shall be kept during the construction process. The leftovers shall be removed by the Contractor according to the general cleaning specifications.

1.01.07) Excavation This item consists in the excavation and removal of remnant material until the adequate depth for the location of the foundation elements for the tower according with the project drawings. The contractor shall perform the excavations needed to execute the works and shall be prepared to excavate in any type of material, using the appropriate methods, equipment and tools. Prior to start with the excavation, the contractor shall perform a survey of all aerial, surface or underground interference, in order not to damage pipes, boxes, wiring, posts, hoses, wells or other elements or structures existing in the work area or adjacent to it. Should the excavation interfere with sewers or pipes, the contractor shall build adequate support or protection for these installations.

The depth of the excavations and fills shall vary according to the works to be executed and the studies done by the Contractor. For this specific site the geotechnical study recommends that the foundation level is 3 m. below the natural ground level. The excavated material shall not be stored in the top of the excavation. It shall be lifted immediately to the trucks and transported to an authorized dump located outside the base if it is required.

The contractor shall post signs (warning signals) and provisional fencing at all excavation sites. The fencing shall consist of three yellow plastic tape eight (8) centimeters wide and supported by temporary sleepers fastened securely to the ground, placed in order to avoid accidents. To prevent their obstruction or damage, the contractor shall keep clear all drains, caps and catch pits in public utility networks near excavation sites. The contractor shall be responsible of any over excavation caused by a cave-in, deficiency of the material existing in the zone or other reasons, who shall fill at his cost the over excavation with granular material previously approved, until the excavation has the required section.

The material removed from the excavation shall be removed as indicated in the general cleaning items. The contractors shall be responsible of the conduction of surface water and the evacuation of underground water and any other type of water, as well as the supply and maintenance of drainage or pumping systems required to stabilize the slopes and avoid water getting into the excavations.

1.01.08) Compacting of the foundation level This item consists in the compacting of the bottom level of the foundation for the construction of the foundation elements of the tower.

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In all the areas to build, the soil in the bottom of the excavations shall be compacted before initiating the filling activities, using mechanical and/or manual equipment. The selection of the compacting equipment shall be approved by the US Government representative and shall adjust to the plasticity characteristics of the material to be compacted. If during the compaction process the bearing layers show faults or bland zones, these shall be replaced on time with excavations and fillings by the Contractor at its own cost.

1.01.09) Filling in compacted granular material This item consists in the supply, installation and compaction of the base in selected granular material that shall be the support for the foundation elements for the tower according with the drawings of the project.

This item includes the supply of all the labor, materials, equipment and the execution of all the necessary works for the installation of the compacted filling material required by the project. The thickness of the fill shall vary according with the area of the foundation, for each of the works. Before initiating the filling works, the base material shall be totally clean of any vegetation, organic material and residual material from the construction and the surfaces shall not have any inundation or zones with stagnant water.

The filling materials shall be obtained from sources authorized by current applicable environmental standards and by the Law, selected by the Contractor and approved by the US Government Representative. At least 7 days before initiating the filling materials works, the contractor shall submit to the US Government the information on the sources of materials and shall submit all the working permits, the representative samples and the results of laboratory tests. The supply of the samples and the laboratory tests shall not represent additional cost.

The filling material shall be constituted by sandy granular material without organic lime, vegetal material, residues, waste or debris. The maximum size of the material shall not exceed five (5) centimeters. The fines content (percentage passing sieve No. 200) shall be inferior to 20% and the plasticity index of the material passing sieve # 40 shall be lower than 6%. The filling material shall be compacted in symmetric layers of ten

(10) centimeters and 95% of the density shall be obtained with the compaction test of the Modified Proctor. The methods and equipment of compaction shall have the approval of the US Government Representative. The thickness of the compacted filling shall be at least 20 cm.

1.02) Concrete Structures

1.02.01) Concrete foundation The part of the construction specified here includes the supply of the manual labor, materials and equipment, and the execution of all the works necessary for the construction of the foundation for the tower which consists in concrete reinforced footing, concrete pedestals, concrete tie beams and sub-floor concrete slab. Before initiating the construction of the foundation, the construction site shall be free from vegetation and construction materials and the surfaces shall not have inundated zones or zones with stagnant water. The bases shall be leveled before pouring the concrete.

The foundation structures shall be built in accordance with the NSR-10 and the recommendations of the soils study. The concretes shall have a strength f’c of minimum 3000 psi (210 kg/cm2), which shall be certified by the Contractor using test cylinders that he shall take following the applicable standards. The re-bar for the foundation shall be grade 60. The contractor shall follow the parameters of the design supplied by the US Government. This activity includes the supply, formwork, transportation and installation of the concrete for the footing and pedestal as well as for the concrete tie beams and sub-floor slab including the reinforcement steel specified on the structural design.

Contractor shall include the execution of the corresponding laboratory tests as required. The Contractor shall take 6 sample cylinders for concrete resistance tests per pouring or per each 5 m3, in order to test 2 cylinders at 7 days, 2 cylinders at 28 days and leave 2 cylinders as proof samples. The results of the laboratory tests shall be

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given at the right time to the Embassy Representative. High quality grouting shall be taken into account for filling and leveling of the anchorages between the upper part of the concrete pedestals and the base of the tower.

The concrete surface shall be adequate for the placing of the grouting.

1.03) Steel Structure This chapter consists in the construction of the complete structure of the tower, in accordance with the drawings and terms of reference, including all the elements and accessories necessary for its fabrication, assembly and installation. Before the construction of the steel structure, the Contractor shall verify the design supplied by the US Government, the shop and construction drawings, and the description of all the fabrication and assembly system, characteristics of bolts and welding, steel qualities, painting, etc. If it is found that in the design some changes shall be done in order to fulfill the standards, this changes shall be taken into account in the proposal.

This way when executing the project, this shall be done in total accordance with the current standards.

The main design standards are the EIA-222F, the code AISC and the standard NSR-10. The design shall also fulfill the following minimum specifications for the structural elements:

-The struts, diagonals and steps which are high resistance steel shall comply with the ASTM A572 Grade 50, with a leverage point of 50,000 psi or 350 Mpa.

-The brackets and union metal plates which are normal resistance steel shall comply with ASTM A36 with a leverage point of 36,000 psi or 250 Mpa.

-The nuts and bolts shall comply with the ASTM A394 and ASTM A A563.

-The anchor bolts shall be SAE 1020 normalize.

-The structural elements shall be galvanized in heat by immersion according to the standard ASTM-A123.

Before beginning with the fabrication of the structural elements, the contractor shall deliver the quality certificates of the elements in order to guarantee compliance of the specifications; otherwise the contractor shall perform mechanical and chemical tests as described on the ASTM A370 and the A-6 designation of the ASTM.

The fabrication of the steel structure shall be done following the design supplied by the US Government, the shop and construction drawings as well as the actual edition of the AISC and the NSR-10.

The welding works and materials shall comply with the AWS D1.0 as described on the design supplied by the US Government. The contractor shall follow the welding requirements described on the shop and construction drawings. The US Government representative shall inspect the fabrication and welding at the workshop, before approving the material to be transported to the project site. Any defect or correction to the steel structure or the welding works detected during the inspection shall be corrected by the contractor with no additional cost to the US Government.

A complete section of the tower shall be assembled on the workshop as a sample of the structure. This section shall be chosen randomly and the adjustment of the parts shall be verified by the US Government representative along with the contractor representative. Any defect or correction to the steel structure detected during the inspection shall be corrected by the contractor with no additional cost to the US Government.

The Contractors shall take into account the supply and installation of a metallic support platform for the radar transceiver including support and accessories (Refer to attached structural drawings). The Contractor shall also consider the supply and installation of a metallic radar support for the radar that shall eventually be supplied by the end user (Refer to attached structural drawings). Contractor shall confirm existing equipment requirements.

The contractor shall supply and install leveling grout along the metallic support of the concrete foundation for the tower base.

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The application of the protection coating, epoxy base and paint for the elements of the structure shall be done following the procedures described on the design supplied by the US Government. The quality of the zinc used to galvanize shall be 99.99 % of zinc (High special grade) according to the ASTM B6 or as suggested by the contractor based on quality standards. Elements like aluminum, nickel and tin shall only be included in minimum proportions as impurities. The tower structure shall be painted using base primmer epoxy “poliamida-poliamina” type with high solid content with a minimum dry paint thickness of 4.0 mils. And the finishing paint shall be aliphatic polyurethane type resistant to ultraviolet rays with orange and white colors approved by the Aeronáutica Civil with a minimum thickness of 3.0 mils. These paintings shall be applied with compressor, for aggressive atmospheric conditions.

The tower shall have enough resistance to support the radar and telecommunications equipment required by the Colombian Navy Coast Guard. The assembly shall be done following the procedures described on the design supplied by the US Government and shall include the tower erection, the aligning for the correct verticality and the bolts connection according to the diameter and grade of the bolts. All safety measures shall be considered for the installation.

After the structure is assembled, the surface shall be cleaned with tow cloth, in order to eliminate residues of grease, dust or humidity.

1.03.01) Metallic crane for radar uplifting The contractor shall supply and perform the installation and erection of a metallic crane and all its elements to uplift the radar to the upper metallic platform of the tower at the project site, including specialized personnel and safety elements; following the details shown in the drawings. The contractor shall confirm the engineering design, calculation and shop drawings for the metallic crane taking into account technical specifications. The offeror shall take into account the transportation of the metallic crane and its elements to the project site.

The offeror shall fabricate the metallic crane latticework type including a Pivot along its upper part in order to ease up the colocation of the radar along its support base. This element shall include all its fixing elements as well its fastening fittings and shall be designed to support weights up to 1 Ton. The offeror shall consider the application of protection coating, epoxy base and paint for the elements of the crane, following the specifications mentioned above. The offeror shall provide all the necessary elements for the mounting of the radar to the metallic tower as certified ropes, life lines and additional accessories to ease up the mounting operations.

1.04) Tower Shelter and Enclosure The Contractor shall build a shelter in prefabricated material RBS or similar including walls, roof and divisions in the same material, with a free interior area of 5 m long and 4 m wide and shall be installed on top of the tower concrete slab as shown on structural drawings. The free height of the shelter is 2.83 m average. This shelter is required for the radar equipment and the operators. The structural design shall be reviewed by the Contractor, in order to verify that it is done according with the NSR-10 or shall do the adjustments required. The construction of the RBS pre-fabricated shelter includes the following items:

1.04.01) Pre-Fabricated Wall The contractor shall construct the shelter using a prefabricated PVC e-100 mm or equivalent building that is easy to assembly and dismantle and which has been designed to have heavy duty materials; transportation and relocation, accessories shall be firmly fixed in place so they cannot be removed easily, especially those on the outside of the building. The construction shall be completely hermetic, and the materials should be capable of withstanding a tropical rainy climate.

The building shall comply with Fire Standards and shall be designed in line with the current version of the Colombian Seismic Resistance Code (NSR Standard, 2010).

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The contractor shall provide construction equipment and personnel for assembling the building on site as quickly as possible. The contractor shall be responsible for board and lodging for the construction team on the work site (away from the base), or as arranged with COLNAV Base personnel.

The contractor shall be responsible to receive the material on the COLNAV Base, and shall be responsible for unloading the material and transporting it to the actual work site. The contractor shall use the same prefabricated panel in PVC or equivalent for exterior and interior walls; and shall adapt the design to the construction.

1.04.02) Wall Structure The contractor shall supply and install the corresponding structure according to NSR 10. The prefabricated wall cells shall be filled with reinforced concrete. Vertical and horizontal reinforcement shall be minimum ½”.Walls shall be anchored to concrete slab. Wall shall be perfectly leveled, verifying that between wall and floor slab there is a 90 degree angle. Electrical and air conditioning units’ drainage systems shall be embedded into walls.

Windows and door frames shall be embedded into walls.

1.04.03) PVC Roof Panels Roof shall be made of prefabricated PVC or equivalent thermos-acoustic panels, with the edge made of PVC;

colors shall be selected by the US Government representative.

1.04.04) Floor tiles for Shelter interior

The Contractor shall install floor tiles inside the shelter floor, and shall consist in a 0.34 x 0.34 m ceramic tile type DUROPISO or equivalent, non-slippery, commercial traffic 5, with the corresponding ceramic tile skirting.

The Contractor shall include floor-tile bonding material and joint sealing material. Samples shall be submitted for approval before purchasing and installation.

1.04.05) Metallic Doors for Shelter The contractor shall supply and install two (2) metallic doors in steel sheet gauge 20 with a width of 1.10 m and a height of 2.20 m. The frame shall be in cold rolled sheet gauge 18 and shall include security lock with its keys and an additional round metallic lock with its keys. Door bumps shall also be included, as well as door sweeps along the shelter doors. The metal work shall include two coatings of anti-corrosive painting and two coatings of finishing painting. The color shall be defined by the US Government Representative.

1.04.06) Superboard Panels along Shelter Walls.

The Contractor shall supply and install finishing panels along the shelter walls using Super board system or equivalent in order to cover the copper mesh for Faraday Cage. The Super board system includes fiber cement panels along one sides of wall supported by metallic studs, channels, bolts and accessories. The Contractor shall guarantee the appropriate anchoring of the fiber cement panel to the metallic studs following the recommendations of the manufacturer, and shall include the tape and sealant for the treatments of joints between the panels.

The Super board system shall follow the recommendations in the NSR-10 and shall be resistant to water and exterior conditions. The Contractor shall consider the heights of the walls shown on the attached architectural drawings and the ease of conducting of the electrical pipe inside the system.

The Contractor shall supply and install stucco along the Super board walls following the recommendations of the manufacturer and shall verify that the stucco is completely smooth and free of imperfections before interior painting is done.

A/LM/AQM/IP 14

1.04.06.01) Painting of Superboard Panels The Contractor shall supply and apply three (3) coats of white paint brand, Viniltex type 1 pintuco reference 1501 or equivalent, on the clean and finished surface of the Super board walls. The Contractor shall apply the coats in different directions in order to achieve a high-quality finish. The Contractor shall include painting of cutting edges, expansions joints, etc.

2) GENERAL ELECTRIC INSTALLATIONS

2.01) Electrical Scope

The electrical work consists of the following activities:

Installation and start-up of two generator sets to provide electricity to the radar tower including installation of additional equipment such as but not limited to ATS, Pre heaters; Day tanks for a fully functional system, the contractor shall also include all the necessary items to test the Generators at pickup point and at site when final installation is complete.

Supply and installation of the electrical power system - Low Voltage (LV) networks Supply and installation of the internal network distribution and devices of the communication house

(named also as “Shelter”).

Supply and installation of the Air Conditioning system Supply and installation of the grounding and lightning protection systems.

Supply and installation of electrical distribution and devices on the Tower, to include lighting, lighting control and receptacles on each of the tower platforms.

Supply and Installation of cable tray and all raceway inside the shelter and on the tower.

Supply and Install Led Obstruction Lighting Install Faraday Cages in Shelter House.

Supply and Install fuel system for the generators including installation of Tanks, Piping, signage, containment pool, Fenced Enclosure and all the requirements as per codes and standards.

Supply and Installation of rubber sleeves (Boot Type) for the transition from the ladder outside the shelter to the cable tray inside the shelter. The rubber sleeves shall be off the shelve units specifically designed for this type of application.

Supply to complete sets of equipment for working at heights at each site.

2.01.01) Electrical Standards The proposed work paper includes all the electrical designs, technical specifications, supply of materials and parts, which are required for the electrical work and its execution on site. The Contractor shall comply and strictly observer the last upgrade of the following electrical standards: NTC 2050, NEC 250, NTC 3475/ UL 67, EIA/TIA 568-569, EIA/TIA 607, IEEE C62.41-C62.45, NFPA 780, NTC 4552, IEEE-80, RETIE and CIDET.

The awarded Contractor shall have an electrical/electronics engineer, who shall oversee the execution of the work. The proposed electrical/electronics engineer shall also sign the installation conformity and material conformity acts requested on RETIE. The proposed engineer shall have experience of five years or more on similar projects, in fact his/her curriculum vitae shall be annexed in the proposal.

2.01.02) Material, Equipment and Parts The Contractor shall use well known market brand materials, equipment and parts certified and approved by RETIE. All products to be used during the project execution shall be new, manufactured in a period not longer than six months when the contract is awarded. The products, equipment and parts to be supplied and installed shall comply with international standards and US Federal Regulations. The Contractor shall submit the custom clearance documentation (nationalization acts) for those assets which were directly imported, this is required to accredit afterwards the assets’ ownership and to perform the process of donation in a suitable manner for the Colombian Government.

A/LM/AQM/IP 15

Important notes: The contractor shall submit in his proposal catalogs and technical sheets for all the electrical materials to be used during the project (detailing specifically the items to be used on the contract). Lack of information and omission of such data shall consider the proposal as invalid and shall not be taken into the awarding process. The required civil work for the underground raceway system shall include the costs for repairing the affected areas during the project execution (Sidewalks, pavements, green areas and concretes among others). The awarded Contractor shall comply with civil and electrical Colombian Constructions standards even if the affected areas do not.

The Contractor shall not supply and install products, materials, equipment or accessories during the contract execution, which have not been previously approved by the US Government representative. In that case the Contractor shall be responsible to assume costs (overruns) and time that might be necessary to comply with the US Government representative and contract requirements.

Testing: The Contractor shall include in his offer a list of equipment and devices required to achieve a testing process over the systems to be installed. The equipment to be used during testing processes shall be calibrated by a certified company. The equipment to be used shall count with a valid calibration certificate issued no longer than 12 months.

2.01.03) Main Electrical Circuits The new electrical circuit branches shall support a 15KVA power system. The new circuit branches shall by three-phase and neutral system plus grounding line, THHN/THWN-2, 3X#6 + 2X#6 AWG. The installed feeder lines shall be brand Centelsa, Procables or equivalent RETIE certified.

2.01.03.01) Main circuit branches – Low Voltage (LV) The Contractor shall supply and install a new main circuit branch, 208/120 VAC 60Hz, running from…