TECHNICAL SPECIFICATIONS SUPPLY & INSTALLATION OF PHOTOVOLTAIC POWER SYSTEM IMPROVEMENT OF SANITATION FACILITIES AND RENOVATION OF SCHOOLS FOR IDP RETURNEES IN SASIGA WOREDA, EAST WOLLEGA. JUNE 2021 1 1. GENERAL 1.1 Project Information Title of the Project: Humanitarian Basic Social Services and Sanitation for IDP Returnees; Improvement of Sanitation Facilities and Renovation of Schools for IDP Returnees; Project Assignment: Supply & Installation of Photovoltaic Power System; Beneficiaries: IDP returnees found in the Sasiga woreda of East Welega in Oromia regional state. 400 students and around 20 teachers; Education and Health Ministries and their lower level offices which includes regional bureau, zone departments and woreda offices; Location: Lalisa Wata School -Sasiga Woreda, East Welega zone of Oromia Regional State, Ethiopia Donor: Government of Japan Implementer: UNOPS-ETOH 1.2 Background The Joint Oromia and Benishangul Gumuz regional states proposal submitted to the UN Durable Solutions Initiative reported that about 13 schools have been destroyed by conflict in Welega zones. Sasiga woreda belongs to one of the woredas in East Welega Zone of Oromia region, which was highly affected by the security problem and has hosted the largest Internally Displaced People (IDP) returnees. Reports from the Oromia region Education Bureau indicated that four primary schools are completely damaged in Sasiga Woreda alone and around 1,000 primary school children are reported to be out of school due to the conflict and lack of school facilities to pursue their education. One of the major challenges faced by the humanitarian support community while trying to resettle the IDPs into their place of origin has been the inadequacy and unavailability of social infrastructure like schools, clinics and sanitation facilities, which were destroyed by the conflict. Reconstruction of social infrastructure, especially schools and public latrines damaged during the conflict, are found in urgent need, to promote the peaceful return of IDPs. UNOPS has made discussions with Oromia region Disaster Risk Commission (DRC) and Education Bureau heads and also visited East Welega Zone DRC and Education department heads. These government officials have identified Sasiga Woreda as a priority for rehabilitation. The Lalisa Watta School located in Sasiga Woreda has been selected for consideration under this project due to the large number of IDP returnees and the extent of damage to the school. Among others, the Program was planned to include construction of the following facilities: ● New Classrooms (2 Blocks each with four classrooms for a total of 8 classrooms); ● New Admin building hosting offices for the school director, deputy director, teachers room, pedagogic room and archive; ● Toilets and shower for students and teachers; ● Power using solar PV system for the admin building and classrooms; 2 ● Construction of borehole for Water supply; ● Waste water drainage system – Septic Tank System; ● Storm water drainage system; ● Rainwater harvest system and; ● Pit latrines to the Local Communities. The Government of Japan with the Federal Ministry of Education considered to engage the services of UNOPS in the design and construction management of the facilities in the premises of the selected school. UNOPS committed to develop the design with the associated utility facilities using in-house expertise and render all the necessary project management services for the construction of the infrastructure facilities through UNOPS competitive bidding procedures. In view of the above, UNOPS proceeded with the complete design and procurement process of the construction works of the Lalisa Watt School. Currently the construction works of the school that include civil works, electrical works, sanitary and plumbing works are under construction by a reputable Contractor with about 60% completion in the Month May 2021. UNOPS planned to arrange separate procurement procedure for the supply and installation of Photovoltaic Power System and connect it to the switch board installed by the Contractor for distribution. 1.3 Scope of Works The scope of work will include supply and installation of standalone Photovoltaic Power System associated with renovation of Lalisa Watta School in Sasiga Woreda, East Welega Zone. The supply and installation task would include the following facilities: ● PV Module; ● Batteries; ● Inverter and Charge Controller; ● PV array Mounting rack; ● Control Box; ● Lightening Protection; ● Cable and wires; ● Earth Systems. 1.4 Site Description ● Land ownership: The school has a total area of 13.7 ha of land under the possession of the school which included the existing and proposed site for expansion. The land is exceedingly high from the minimum land requirement for a primary school set by the Ethiopian Education Bureau Standard. The land is composed of two sites as subdivided by 25.0m public road. Site-1 comprising of the existing facilities of the school is situated to the South-East direction having an area of 4.9 Ha. Site-2 with an area of 9.4 Ha is currently vacant and the community are using for farming. ● Site Location: Walisa Watta School is located about 42 Km North direction from Nekemte town along the Nekemte-Benishangul avenue. The site is located at GPS coordinates of 9o21’07.70” N and 36o25’31.11” E and average altitude of 1370 m above sea 3 level. It is situated in the middle of a farm land with no infrastructure in the vicinity. It is neighbored by a local community village named 8th Camp about 800m to the North, bordered by a river about 700m to the East and Mountain Watta across the river. Fig: Lalisa Watta Primary School: Google Earth Map ● A topographic Map has been developed based on site data information that include UTM coordinates and levels gathered from the Sasiga Woreda technical team. 4 Topographic Map – Lalisa Watta School It was found that the predominant section of the site remains gentle with a uniform slope of about 2.85% towards the river valley to the East. The site covered by the existing infrastructure is relatively a highland sloping towards the river. The North-East corner of site-1 is the lowest point with a level difference of 6.0m from the upper most corner located at the South-west of the site over a length of 400 m. ● Climate: Given that the site is located in remote area, it has been hard to get annual statistical data with regard to climatic condition of the Woreda. The assessment team, however, was able to record a temperature of 33o Celsius witnessed at noon during the visit. It was also noted that the school doesn’t run afternoon classroom sessions due to the relatively hot temperature affecting the teaching-learning program. The area is predominantly hot and dry with relatively low humidity during months of (October – May) which coincides with the academic calendar. High rainfall is experienced from (June – September) of the year. Wind direction is predominantly East – West and the site relishes fresh air breeze from Mount-Watta located in the South-East direction. ● Geo-technical Information: The region is predominantly covered with red clay soil to considerable depth exceeding of 20m depth. This clay is known for its good bearing capacity and no swelling- shrink character. During the site visit, exploration has been made using test pit dug to a depth of 2.5m to verify and confirm the soil layer. The geo-technical investigation conducted to a depth of 2.0m from natural ground level (NGL) for the sites has revealed uniform layer of foundation soil at shallow depth. A red clay soil with a bearing capacity of 150 KPa has been considered safe for the design of foundation of buildings. 5 2 SPECIFICATIONS OF PV SYSTEMS 2.1 Introduction A Stand-alone Battery based Solar Roof top mounted Photovoltaic (SPV) Power System consists of SPV array, Module Mounting Structure, Power Conditioning Unit (PCU) consisting of Maximum Power Point Tracker (MPPT), and Controls & Protections, interconnect cables, Junction boxes, Distribution boxes and switches. PV Array is mounted on a suitable structure. Components and parts used in the SPV power plants including the PV modules, metallic structures, cables, junction box, switches, PCUs etc., should conform to the BIS or IEC or international specifications listed below, wherever such specifications are available and applicable. Solar PV system shall consist of following equipment/components. Solar PV modules consisting of required number of Crystalline PV cells, Mounting structures Junction Boxes, Earthing and lightening protections, IR/UV protected PVC Cables, pipes and accessories. This section of the Specification deals with the general standards of materials and workmanship and approved methods in connection with the design, manufacture and installation of the electrical services. This section must be read in conjunction with other sections of the Specifications and Drawings and schedules issued herewith. In the instance of reference to more than one standard the stringent of all shall govern. The Battery based SPV system shall support essential electric equipment and its indicative electrical power requirements and categorizes the following: (i) Room and service lightings/LED lamps with switches; (ii) Power sockets, (iii) Water Pump. The recommended battery bank system voltage is 48 Vdc Except for materials or items or equipment which are specified as being supplied and/or fixed for the works by others, these works shall include the supply, testing and delivery to site, loading, unloading, storage in safe custody, erection, connection, finishing, carrying out preliminary tests at site, commissioning, performance testing and operation for at least one month and putting into service of the whole of the materials, fittings and all cables and conduits necessary for the electrical installation works as specified and scheduled herein and/or indicated on the drawings issued herewith. Materials and products should comply with the following: (i) This Specification (ii) Balance of Solar PV Systems (BOS): IEC 61215 Crystalline Silicon Terrestrial PV modules poly/mono. IEC 61730 Solar PV module safety qualification requirements.