W9127822R0005 Section J - Exhibit 11.2.2 SOP-FAC 006 Grounding & Lightning Protection System.pdf

STANDARD OPERATING PROCEDURE (SOP) – ANNUAL PREVENTIVE

MAINTENANCE ACTIVITIES TO GROUNDING AND LIGHTNING

PROTECTION SYSTEMS AT LIMA, IQUITOS AND PUERTO MALDONADO

SITES

General Requirements for Lima, Iquitos and Puerto Maldonado

The grounding system in NAMRU-6 Lima is composed of an equipotential mesh grounding electrode located in the green area on the rear side of building 1 and approximately 15 single earthing pits installed inside NAMRU-6 Lima compound. The equipotential mesh grounding system consists of 6 earthing pits interconnected using electrodes. A picture of the exact location of the mesh grounding is shown below.

Section J - Exhibit 11.2.2 SOP-FAC 006

Contractor shall provide maintenance to mesh ground and all earthing pits located inside NAMRU-6 compound in Lima following the specifications of this SOP and also good engineering practices.

The grounding system in NAMRU-6 Iquitos is composed of approximately 10 single earthing pits installed inside NAMRU-6 Iquitos compound. The scope of this SOP also covers the lighting protection systems. There are three buildings (insectary building, laboratory building and administrative building) which each one has a lightning protection system that consists of air terminals installed along the parapet of the roof and connected with wires to earthing pits. The lightning system also is connected to the mechanical equipment (air conditioners, exhaust fans, etc.) metallic envelopes of each building. Contractor shall provide maintenance to all earthing pits and lightning systems located inside NAMRU-6 compound in Lima following the specifications of this SOP and also good engineering practices.

The grounding system in NAMRU-6 Iquitos is composed of approximately 5 single earthing pits installed inside NAMRU-6 Puerto Maldonado compound. Contractor shall provide maintenance to all earthing pits located inside NAMRU-6 compound in Lima following the specifications of this SOP and also good engineering practices.

Contractor shall provide the names and certification of the technicians performing preventive maintenance tasks. Only qualified technicians shall perform preventive and corrective maintenance tasks. All preventive maintenance tasks will be executed under technical specifications in Electrical Maintenance, electrical specifications in low-voltage systems, electrical equipment and materials, with qualified personnel who will have current insurance policy (known also as SCTR) and in compliance with local occupational health and safety laws and protocols.

Contractor shall perform annual preventive maintenance activities to all of the equipment specified in this document. It is the responsibility of the contractor to perform a full inspection of the systems and collect all required information to provide a quality preventive maintenance. In addition, contractor shall review operation manuals for the equipment of the systems under this contract and include any recommended preventive maintenance activities by the manufacturer not mentioned in this document.

Contractor shall elaborate, review and update the drawings in AUTOCAD of the grounding and lightning protection system in Lima, Iquitos and Puerto Maldonado sites on an annual basis.

Contractor shall include all materials, tools and personal protective equipment necessary to perform preventive and corrective maintenance work. Contractor must use the necessary and appropriate equipment to delimit the work area and not allow the pedestrian traffic. The contractor’s staff shall use the appropriate PPE for the activity to perform. NAMRU-6 will not provide any materials, tools nor PPE to the contractor to perform their work.

Contractor shall perform testing of the resistivity of the ground (soil) and the low voltage pits using a certified earth resistance meter before and after maintenance. The recommended values for the mesh grounding is no more than 1.5 ohms and for the earthing pits no more than

25ohms (per NEC and Peruvian Electrical Code). If contractor doesn’t obtain the values stated in this SOP after performing maintenance, contractor shall provide a technical solution (such as, adding more earthing pits, replacing copper bars, etc.) as a corrective maintenance to obtain these recommended values.

The contractor shall provide a weekly progress report to the NAMRU-6 facilities department, as well as a completion report when completing the maintenance work to include: activities performed with pictures, recommendations, conclusion and future needed corrective maintenance tasks. When a corrective maintenance work is required, the contractor shall submit a report detailing the problem encountered, with a quotation of the solution. All reports shall be performed and signed by a local certified electrical engineer of the Peruvian college of engineers (CIP - Colegio de Ingenieros del Peru). Certified electrical engineer shall have a valid license.

The preventive maintenance work will be coordinated between NAMRU-6 facilities staff and the staff assigned by the contractor.

Contractor shall perform operational testing of the systems at the completion of each preventive maintenance work. NAMRU-6 facilities department will assign a staff to participate in the operational testing and contractor shall prepare an operational testing form (checklist) to be signed by the facilities staff once testing is perform and accepted.

It is the responsibility of the contractor to dispose properly out of NAMRU-6 facilities all consumable materials and garbage generated by the contractor during the performance of the maintenance activities. Contractor shall replace new grass in the green areas affected during the execution of the activities described in this SOP.

Contractor must be aware that a scheduled power outage will last no more than 90 minutes due to the minus 80 freezers can’t be de-energized for more than 90 minutes. In addition, power outages shall be scheduled only on Saturdays. In the event a second or third power outage is required, it has to be scheduled for the following week.

Applicable codes:

The following are applicable codes for the elaboration of the preventive maintenance plan, reports and activities mentioned in this document:

NFPA 77

NFPA 70

NFPA 780

NEC

Peruvian National Electrical Code 2006 IEEE Standards Peruvian Building Code 2006 (RNE) IEC – International Electrotechnical Commission Local codes and regulations

Description of work required in Lima, Iquitos and Puerto Maldonado

The contractor shall perform the following preventive maintenance activities to the grounding and lightning protection systems in NAMRU-6 Lima:

Grounding System – LIMA Item Sub-system Task Frequency

1 Equipotential mesh grounding Inspect and clean all electrical equipment Annual

2 Equipotential mesh grounding

Visual Inspection of the status of the equipment. Annual

3 Equipotential mesh grounding

Measurement of mesh and wells to land before and after maintenance, with a certified tellurometer.

Annual

4 Equipotential mesh grounding

Perform all Preventive Maintenance activities recommended by the manufacturer.

Annual

5 Equipotential mesh grounding

Inspect the adjustment of the wires, cables and copper bars. Annual

6 Equipotential mesh grounding

Perform maintenance to mesh grounding (P1-P6) where accessible by removing the soil an estimated depth of 60 cm by 40 cm width and replacing with organic chemical soil and adding an ecological chemical solution and soil in the earthing pits.

Annual

7 Equipotential mesh grounding

Cleaning and sanding of the sulfated parts of all the contact terminals between the ground lines and copper rod.

Annual

8 Equipotential mesh grounding

Visual inspection to concrete lids of earthing system. Place number, sign and repair and paint and/or replace if necessary. Check concrete lid is painted with approved colors per local electric code and repaint if necessary.

Annual

9 Equipotential mesh grounding

Perform testing and provide certificates signed by licensed engineer by college of engineers.

Annual

10 Earthing pits Inspect and clean all electrical equipment Annual

11 Earthing pits Visual Inspection of the status of the equipment. Annual

12 Earthing pits Measurement of mesh and wells to land before and after maintenance, with a certified tellurometer.

Annual

13 Earthing pits Perform all Preventive Maintenance activities recommended by the manufacturer.

Annual

14 Earthing pits Inspect the adjustment of the wires, cables and copper bars. Annual

15 Earthing pits Cleaning and sanding of the sulfated parts of all the contact terminals between the ground lines and copper rod.

Annual

16 Earthing pits Perform maintenance to grounding pits by adding an ecological chemical solution and soil if necessary.

Annual

17 Earthing pits

Visual inspection to concrete lids of earthing system. Place number, sign and repair and paint and/or replace if necessary. Check concrete lid is painted with approved colors per local electric code and repaint if necessary.

Annual

18 Earthing pits Perform testing and provide certificates signed by licensed engineer by college of engineers.

Annual

The contractor shall perform the following preventive maintenance activities to the grounding system in NAMRU-6 Iquitos:

Grounding and Lightning Protection System – IQUITOS Item Sub-system Task Frequency

1 Earthing pits Inspect and clean all electrical equipment Annual

2 Earthing pits Visual Inspection of the status of the equipment per requirements of NFPA780 Annual

3 Earthing pits Measurement of mesh and wells to land before and after maintenance, with a certified tellurometer.

Annual

4 Earthing pits Perform all Preventive Maintenance activities recommended by the manufacturer.

Annual

5 Earthing pits Inspect the adjustment of the wires, cables and copper bars. Annual

6 Earthing pits Cleaning and sanding of the sulfated parts of all the contact terminals between the ground lines and copper rod.

Annual

7 Earthing pits Perform maintenance to grounding pits by adding an ecological chemical solution and soil if necessary.

Annual

8 Earthing pits

Visual inspection to concrete lids of earthing system. Place number, sign and repair and paint and/or replace if necessary. Check concrete lid is painted with approved colors per local electric code and repaint if necessary.

Annual

9 Earthing pits Perform testing and provide certificates signed by licensed engineer by college of engineers.

Annual

10 Lightning Protection System Inspect and clean all electrical equipment Annual

11 Lightning Protection System

Visual Inspection of the status of the equipment. Annual

12 Lightning Protection System

Check loose connections that might result in high-resistance joints and tight if necessary

Annual

13 Lightning Protection System

Check system has not been weakened by corrosion or vibration and repair if necessary

Annual

14 Lightning Protection System

Check all conductors and grounding electrodes are in good conditions Annual

15 Lightning Protection System

Check all conductors and system components are fastened securely to their mounting surfaces and repair if necessary

Annual

16 Lightning Protection System

Prepare a report to record status of system and components Annual

17 Lightning Protection System

Perform testing (resistance measurements) and provide certificates signed by licensed engineer by college of engineers.

Annual

18 Lightning Protection System

Perform continuity tests and provide certificates signed by licensed engineer by college of engineers.

Annual

19 Lightning Protection System

Perform surge protection test of devices within the system and provide certificates signed by licensed engineer by college of engineers.

The contractor shall perform the following preventive maintenance activities to the grounding system in NAMRU-6 Puerto Maldonado:

Grounding system – PUERTO MALDONADO Item Sub-system Task Frequency

1 Earthing pits Inspect and clean all electrical equipment Annual

2 Earthing pits Visual Inspection of the status of the equipment. Annual

3 Earthing pits Measurement of mesh and wells to land before and after maintenance, with a certified tellurometer.

Annual

4 Earthing pits Perform all Preventive Maintenance activities recommended by the manufacturer.

Annual

5 Earthing pits Inspect the adjustment of the wires, cables and copper bars. Annual

6 Earthing pits Cleaning and sanding of the sulfated parts of all the contact terminals between the ground lines and copper rod.

7 Earthing pits Perform maintenance to grounding pits by adding an ecological chemical solution and soil if necessary.

Annual

8 Earthing pits

Visual inspection to concrete lids of earthing system. Place number, sign and repair and paint and/or replace if necessary. Check concrete lid is painted with approved colors per local electric code and repaint if necessary.

Annual

9 Earthing pits Perform testing and provide certificates signed by licensed engineer by college of engineers.

Annual

Contractor will also include requirements per O&M manuals and any additional requirements not mentioned in this document but required or recommended by manufacturer as preventive maintenance activities to perform annually and/or good engineering practices at all sites.

ADDITIONAL INFORMATION

ANNEX 1: 2018 PREVENTIVE MAINTENANCE TO GROUNDING SYSTEM IN LIMA

ANNEX 2: 2020 PREVENTIVE MAINTENANCE TO GROUNDING SYSTEM IN PUERTO

MALDONADO

ANNEX 1

AAI & NETWORK S.A.

Urbanización Santa Rosa D-4 Los Olivos, Teléfonos 531-1004 y 994 165 054

E-mail: jg@aainetwork.net

INFORME Nº14847

CLIENTE : NAMRU-06.

UBICACIÓN : HOSPITAL NAVAL.

ATENCIÓN : ING. MAURICIO ZEVALLOS.

ASUNTO : MANTENIMIENTO DE POZOS A TIERRA.

FECHA : 04 DE DICIEMBRE DEL 2017.

EJECUTADO : ING. LUIS INFANTAS VALENZUELA.

RESPONSABLE : ING. V. ALEXANDER GUTIERREZ C. - CIP N° 141743.

APROBADO : ING. J. JESUS GUTIERREZ P. -CIP 65842

REF. : INFNAM08 / PRENAM080.

1.- ANTECEDENTES:

1.1.- En el mes de Noviembre del 2017 se realizó el mantenimiento de los pozos a tierra, previa coordinación con el Departamento de Mantenimiento.

2.- TRABAJOS REALIZADOS:

2.1.- Limpieza y lijado de la parte sulfatada de todos los bornes de contacto entre el cable de línea a tierra con la varilla de cobre.

2.2.- Numeración de los pozos del sistema de puesta a tierra según a la malla que corresponden, pintado de bordes de la tapa y pozo con pintura de color amarillo tráfico.

2.3.- Reactivación de los pozos del sistema de puesta a tierra sacando la tierra de chacra, para luego colocar una solución química ecológica especial para pozos de tierra, adicionándole tierra de chacra hasta cubrir la varilla de cobre.

2.4.- Mediciones después de realizada la reactivación.

mailto:jg@aainetwork.net

Urbanización Santa Rosa D-4 Los Olivos, Teléfonos 531-1004 y 994 165 054

E-mail: jg@aainetwork.net

3.- INSTRUMENTO UTILIZADO PARA LA MEDICION:

DIGITAL EARTH TESTER.

MODELO : 4105A.

MARCA : KYORITSU.

4.- MANTENIMIENTO DE LOS POZOS A TIERRA:

4.1.- SISTEMA DE PUESTA A TIERRA DE BAJA TENSION “MALLA A” QUE

COMPRENDE LOS POZOS DEL PT-01 AL PT-06.

4.1.1.- Apertura de la zanja en todo el jardín.

4.1.2.- Colocación de “cachacos” y malla de protección del área de apertura.

4.1.3.- Colocación de protección para colocar la tierra sobre el grass.

Urbanización Santa Rosa D-4 Los Olivos, Teléfonos 531-1004 y 994 165 054

4.1.4.- Encontrando puntos rotos

4.1.5.- Reparando los 4 puntos rotos con soldadura EXOTERMICA.

Urbanización Santa Rosa D-4 Los Olivos, Teléfonos 531-1004 y 994 165 054

4.1.6.- Cierre de las zanjas colocando una solución química ecológica especial para pozos de tierra, adicionándole tierra de chacra hasta cubrir el cable de cobre.

4.1.7.- Colocación de referencias de la malla A para su ubicación.

LEYENDA:

Líneas de referencia de la malla a tierra.

Malla a tierra.

Empalme de la malla y lugar de edición.

4.2.- POZO A TIERRA “PT-07” (Tablero Diesel):

4.3.- POZO A TIERRA “PT-08” (Descarga de gas):

4.4.- POZO A TIERRA “PT-09” (Antiguo Lobby, Edificación en construcción):

4.5.- POZO A TIERRA “PT-10” (Antiguo Lobby, Edificación en construcción):

4.6.- POZO A TIERRA “PT-11” (Antiguo Lobby, Edificación en construcción):

4.7.- POZO A TIERRA “PT-12” (Cuarto de basura):

4.8.- POZO A TIERRA “PT-13” (Sub estación de Media Tensión):

4.9.- POZO A TIERRA “PT-14” (Conteiner de la izquierda):

Urbanización Santa Rosa D-4 Los Olivos, Teléfonos 531-1004 y 994 165 054

4.10.- POZO A TIERRA “PT-15” (Conteiner de la derecha):

5.- MEDICIONES EFECTUADAS:

5.1.- POZO A TIERRA “PT-1 / PT-6” (Malla A):

RESISTENCIA DEL SISTEMA DE PUESTA A TIERRA:

DESPUES = 1.74 OHMIOS.

RESULTADO: BIEN.

5.2.- POZO A TIERRA “PT-7” (Tablero Diesel):

RESISTENCIA DEL POZO A TIERRA:

DESPUES = 7.19 OHMIOS.

Urbanización Santa Rosa D-4 Los Olivos, Teléfonos 531-1004 y 994 165 054

5.3.- POZO A TIERRA “PT-8” (Descarga de gas):

DESPUES = 7.53 OHMIOS.

5.4.- POZO A TIERRA “PT-9” (Antiguo Lobby, Edificación en construcción):

DESPUES = 4.68 OHMIOS.

5.5.- POZO A TIERRA “PT-10” (Antiguo Lobby, Edificación en construcción)

DESPUES = 2.49 OHMIOS.

Urbanización Santa Rosa D-4 Los Olivos, Teléfonos 531-1004 y 994 165 054

5.6.- POZO A TIERRA “PT-11” (Antiguo Lobby, Edificación en construcción)

DESPUES = 2.45 OHMIOS.

5.7.- POZO A TIERRA “PT-12” (Cuarto de basura):

DESPUES = 6.87 OHMIOS.

5.8.- POZO A TIERRA “PT-13” (Sub estación de Media Tensión):

DESPUES = 4.52 OHMIOS.

Urbanización Santa Rosa D-4 Los Olivos, Teléfonos 531-1004 y 994 165 054

5.9.- POZO A TIERRA “PT-14” (Conteiner de la izquierda):

DESPUES = 4.78 OHMIOS.

5.10.- POZO A TIERRA “PT-15” (Conteiner de la derecha):

DESPUES = 7.09 OHMIOS.

6.- LAS RESISTENCIAS DE LOS POZOS SE ENCUENTRAN BIEN.

Atentamente.

Ing. J. Jesús Gutierrez P.

Gerente General

A.A.I. & NETWORK S.A.

ANNEX 2

INFORME N° 001-2020-MDD/JZT

A : Embajada de los Estados Unidos – NAMRU 6

DE : Julio Zuñiga Turpa.

ASUNTO : Mantenimiento de 05 pozos a tierra.

REFERENCIA : Orden de Servicio PO#N4485220P0134 - FAC206034.

FECHA : Puerto Maldonado 02 de noviembre del 2020.

Por medio del presente de dirijo a ustedes con el fin de informar de los trabajos realizados sobre mantenimiento de 05 pozos a tierra según los detalles siguientes:

FASE 1: Medición de omhmiaje antes del mantenimiento del tablero de distribución y grupo electrógeno.

FASE 2: Excavación.

FASE 3: Preparación y hechado del tierra gel.

FASE 4: Lijados y cambios de conectores.

FASE 5: Medición de omhmiaje después del mantenimiento del tablero de distribución y grupo electrógeno.

FASE 6: Acabados finales (pintados de tapas de los pozos)

SE ADJUNTA:

1. Certificado de medición de resistencia eléctrica del tablero de distribución.

2. Certificado de medición de resistencia eléctrica del grupo electrógeno.

Es todo en cuanto informo para los fines correspondientes.

ATENTAMENTE:

JULIO ZUÑIGA TURPA

DNI N° 24998940

RUC N° 10249989407