Semangka Hydroelectric Project

Transcription

1 Semangka Hydroelectric Project Volume I - Non Technical Summary May 2014 PT Tanggamus Electric Power

2 Semangka Hydroelectric TRS 01 A Project local October 2013 Volume I - Non Technical Summary May 2014 PT Tanggamus Electric Power Artha Graha Builidng 16th Floor, Jl. Jend. Sudirman Kav52-53, Jakarat Mott MacDonald, Orchard Building, 1 Grange Road, #07-01, Singapore, T f ,

3 Issue and revision record Revision Date Originator Checker Approver Description A LK. Lim N. Stone A. Day Draft Report B LK Lim N. Stone A. Day Incorporation of comments from TEP, POSCOEN and SMBC C L. Bufi LK. Lim T. Beskeen M. Coroi T. Streather K. Haymon M. Chesson Final Report This document is issued for the party which commissioned it and for specific purposes connected with the above-captioned project only. It should not be relied upon by any other party or used for any other purpose. We accept no responsibility for the consequences of this document being relied upon by any other party, or being used for any other purpose, or containing any error or omission which is due to an error or omission in data supplied to us by other parties. This document contains confidential information and proprietary intellectual property. It should not be shown to other parties without consent from us and from the party which commissioned it. Mott MacDonald, Orchard Building, 1 Grange Road, #07-01, Singapore, T f , W

4 Content Volume I Volume II Volume III Volume IV Volume V Non Technical Summary EnvironmentalImpact Assessment Social Impact Assessment Environmental and Social Management and Monitoring Plan Appendices/Supporting Documents Chapter Title Page 1. Introduction Overview Who is the Project developer? Where can I find more information about the Project? The Project Why is the Project needed? What and where is the Project? When will the Project happen? How were the Project site and technology selected? Managing Environmental and Social Impacts What are the Project activities that could affect the environment and people? How was the Project assessed, and what were the findings? Cumulative impacts with other projects and transboundary impacts How will TEP manage environmental and social impacts? Summary of Project Significance 40 Tables Table 2.1: Project programme 12 Table 3.1: Social management 19 Table 3.2: Hydrology, hydrogeology and water quality management 20 Table 3.3: Ecology and biodiversity management 23 Table 3.4: Geology, landslides and seismic risks 26 Table 3.5: Noise and vibration management 28 Table 3.6: Air quality management 31 Table 3.7: Greenhouse gas emissions and climate change adaptation 33 Table 3.8: Land quality and waste management 35 Table 3.9: Summary of impacts 36 Table 3.10: Traffic and transport management 37 P:\Singapore\GB4\Projects\ Semangka HEP ESIA\7.0 Working Documents\3. ESIA\1. Volume I - NTS\2. Final ESIA\ ESIA_Semangka_VolI_rev_C

5 Figures Figure 2.1: Semangka Project location 12 Figure 2.2: The HEPP main components 13 Figure 2.3: Currently proposed HEPP general layout 14 Figure 2.4: Transmission line layout (Part 1 of 2) 15 Figure 2.5: Transmission line layout (Part 2 of 2) 16 P:\Singapore\GB4\Projects\ Semangka HEP ESIA\7.0 Working Documents\3. ESIA\1. Volume I - NTS\2. Final ESIA\ ESIA_Semangka_VolI_rev_C

6 1. Introduction 1.1 Overview This Non-Technical Summary (NTS) presents the main findings and conclusions of the Environmental and Social Impact Assessment (ESIA) undertaken for the proposed development of a -55.4MW run-of-river hydroelectric power plant ( HEPP ) and ancillary facilities (collectively known as the Semangka Project or the Project). The Project, which is to be developed by PT Tanggamus Electric Power (TEP), is located in the administrative jurisdiction of Sidomulyo Village (or locally known as Pekon Sidomulyo), Semaka District, Tanggamus Regency, Lampung Province, Indonesia and consists of the following components: 55.4MW HEPP consisting of two 27.7MW turbines (When referring to the HEPP, this includes the various sub-components (e.g. weir, waterway, penstock, powerhouse, switchyard and tailrace), unless otherwise stated) A 150kV transmission line, 33.4km in length consisting of 112 transmission towers (unless otherwise specified, the term transmission line will be used throughout the report to refer to this specific component of the Project) Access roads totalling approximately 13.7km. For the purposes of this ESIA, the entirety of the Project has been assessed. An Environmental Impact Assessment (Analysis Mengenai Dampak Lingkungan or AMDAL) for the purpose of permitting and compliance with Indonesian legislation was undertaken on behalf of TEP by two local consultants; PT Superintending Company of Indonesia (Sucofindo) and PT Gelar Buana Semesta (GBS). TEP engaged Sucofindo to carry out the AMDAL for the HEPP and its major components and a separate AMDAL for the transmission line by GBS. The ANDALs, the Environmental Management Plan (Rencana Pengelolaan Lingkungan or RKL) and the Environmental Monitoring Plan (Rencana Pemantauan Lingkungan or RPL) for the HEPP were approved on 16 August 2012, whilst the transmission line documents were approved on 29 April The Project is currently in the process of seeking finance from international lenders and TEP has engaged Mott MacDonald to prepare this ESIA as part of demonstrating the Project s compliance with international social and environmental standards, namely the Equator Principles (EP) III, the International Finance Corporation (IFC) Performance Standards and associated general and industry specific Environment, Health and Safety Guidelines, Export Import Bank of Korea s (KEIM) environmental and social requirements based on OECD common approaches and any relevant recommendations of the World Commission on Dams (WCD). A site visit and review of the AMDAL documents identified a number of areas where the Project s environmental and social assessment and management are not fully in line with the above international standards. As the Project progresses through financing involving international lenders, a fully compliant Environmental and Social Impact Assessment (ESIA) is required. This report aims to fulfil that requirement and is comprised of five volumes. This NTS represents Volume I, whilst the other four volumes are as follows: Volume II: Environmental Impact Assessment Volume III: Social Impact Assessment (including Public and Stakeholder Consultation) Volume IV: Environmental and Social Management and Monitoring Plan (ESMMP) Framework Volume V: Appendices / Supporting Documents 9

7 1.2 Who is the Project developer? The Project is being developed by TEP, a company jointly formed by Korea Midland Power Co. Ltd. (KOMIPO), POSCO Engineering Co. Ltd. (POSCOEN), PT BS Energy (BSE) and PT Nusantara Hydro Alam (NHA) specifically for the development of the Project. The Project will be an independent hydroelectric power generator project in Indonesia. TEP has a 30 year power purchase agreement with the state-owned utility company, PT Perusahaan Listrik Negara (PLN). 1.3 Where can I find more information about the Project? The ESIA will be available for the purpose of ongoing disclosure to Project affected communities and other interested stakeholders. Copies of the draft ESIA report will be disclosed in printed format and made available at the Regional Environmental Impact Management Agency office (Badan Pengelolaan Lingkungan Hidup Daerah or BPLHD) in Lampung Province and the Local Environmental Management Office (Badan Pengelolaan Lingkungan Hidup dan Kebersihan or BPLHK) in Tanggamus Regency for public review 1. The draft ESIA Report will also be disclosed at the sub-district office of Semaka, Bandar Negeri Semuong, Wonosobo, Kota Agung and Kota Agung Barat to enable stakeholders to submit comments before the report is finalised. Consultation activities that have been and will be undertaken have been guided by the Stakeholder Engagement Plan (SEP), which is presented in ESIA Volume V and was produced at the outset of the ESIA process. The SEP specifies ongoing stakeholder and community engagement activities including formal and informal consultation events and open days that will be undertaken by TEP beyond the ESIA process and throughout the lifecycle of the Project (the remainder of the construction and operational phases). The SEP is a live document and will continue to be updated throughout its lifecycle. Press releases will also be issued as and when necessary at key stages of the Project and just before the Project is about to become operational. In addition to the consultation events and the comments period for the ESIA, questions and comments can be addressed to the TEP Community Liaison Officer (CLO): Name: Mr. Ahmad Rozi Susanto Address: Jl. Ir. H. Juanda No.27; Terbaya; Kota Agung Tanggamus; Provinsi Lampung Tel: rozisusanto@ymail.com Website: 1 Whilst copies of the entire ESIA will be disclosed, for the purposes of consultation the NTS will be used since it is less technical in nature and more likely to elicit relevant responses from stakeholders. 10

8 2. The Project 2.1 Why is the Project needed? As a whole, Indonesia has been experiencing rapid growth in all segments of the energy sector for several years. The sales of electricity in Sumatra have increased steadily in recent years with an average annual growth of 10%, making it the Indonesian region with the fastest growing demand. Relatively in the same period, the power generating capacity has only grown annually by 5% on average. The State Power Producer (PLN) has published a 10 year generation expansion plan to meet the predicted increase in demand from (Lampiran RPTL ). Current peak demand in Sumatra is 4,269MW and PLN have forecasted peak demand to grow by 8.5% per annum until 2020 (to 9,641MW). Based on this trend, there is a significant need for additional capacity to meet long term increases in power demand. Given the predicted growth in energy demand, there is a large need for new energy generation facilities to be established and commissioned over the next few years. In addition, hydroelectric power has been identified as one of the main renewable energy sources to be developed. PLN has a target to nearly double Indonesia s hydropower energy production capacity from GWh (in 2011) to GWh (2020) within a decade. PLN hopes to reduce the overall average grid emission factor in Indonesia from kg CO 2 /kwh (2011) to kg CO 2 /kwh (2020). 2.2 What and where is the Project? The Project is a 55.4MW HEPP located in the middle reaches of Semangka River which flows in the Southern Sumatra Province. The weir site is located approximately 39km north east from Kota Agung, the principal city of the Tanggamus Regency. A regional map of the location of the Project, a high level summary of the overall run-of-river power plant process and a HEPP layout map are shown in Figure 2.1, Figure 2.2 and Figure 2.3 respectively. The design of the HEPP is proposed to be run-of-river type through construction of a concrete gravity weir at the Semangka River. The weir creates a slight increase of the water level and the controlled diversion of a portion of the river flow. The diverted water will be conveyed via the waterway to a headtank. The waterway consists of1.2km of underground tunnel (5.3m high per 5.3m wide) and 5.5km (6.4m wide per 3.7m high)of open channel. The headtank (a relatively small basin which functions to control the water level before entering the penstock pipe) will regulate the water flow to be delivered to the powerhouse through two units of penstocks (a pipeline which delivers the diverted water downhill from the intake to the powerhouse). In the powerhouse, the diverted water drives the turbines and generators to produce electricity. The diverted water is then redirected back to the natural flow of the river via a tailrace (an open channel). Access roads will be built along the HEPP in order to ensure safe access to the main elements of the Project. The generated electricity will be fed to a double line dedicated 150kV high voltage overhead transmission line link that connects the Semangka switchyard to the Kota Agung Substation. The transmission line will traverse five districts namely Kota Agung, Kota Agung Barat, Wonosobo, Bandar Negeri Semuong and Semaka. For this purpose, a transmission line (33.4km in length) alignment has been identified and 112 transmission towers will be constructed along the route. The proposed 150kV transmission line is shown in Figure 2.4 and Figure

9 Figure 2.1: Semangka Project location Source: TEP Project Overview, When will the Project happen? Table 2.1 presents the main milestone development timescales that are currently envisaged for the Project. Table 2.1: Project programme Activity Feasibility study (completed) Design study (completed) AMDAL (HEPP) AMDAL (Transmission line) ESIA (on-going) Construction (31 months) Operation (30 years) Date (Month or Quarter) September 2011 (submission) August 2012 (submission) August 2012 (approval) April 2013 (approval) Q22014 (submission) Q (start date) Q (start date) A feasibility study was carried out by PT Daewoo Engineering Company (DEC now POSCOEN) in 2011 and a further design report was produced in The final updated design study was completed in January Construction works including site preparation, detailed design, mobilisation and preliminary civil works are expected to commence in Q The overall development of the Project will take about three years to complete. Construction of the intake weir is scheduled to commence in Q and be completed by Q Power plant and transmission line commissioning is scheduled to be carried out in the Q

10 Temporary Building (Workers accomodations) Temporary Building Spoil Bank Weir Sandtrap Weir Tunnel Spoil Bank Temporary Office (Crushing plant and concrete batching plant) Sandtrap Source: Esri, DigitalGlobe, GeoEye, i-cubed, USDA, USGS, AE, Getmapping, Aerogrid, IGN, Tunnel IGP, swisstopo, and the GIS User Community Spoil Bank Facility Building Temporary Building (Workers accomodations) and Spoil Bank Tailrace Temporary Building and Spoil Bank Headtank Facility Building Penstock Grp Stockyard Headtank Penstock Powerhouse Powerhouse Tailrace Grp Stockyard Source: Esri, DigitalGlobe, GeoEye, i-cubed, USDA, USGS, AE, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the Source: Esri, DigitalGlobe, GeoEye, i-cubed, USDA, USGS, AE, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GIS User Community Mott MacDonald. This document is issued for the party which commissioned it and for specific purposes connected with the captioned project only. The accuracy of source data has not been verified and it should not be relied upon or used for any purpose. We accept no responsibility for the consequences of this document being relied upon by any party, or being used for any purpose, or containing any error or omission which is due to an error or omission in data supplied to us by other parties. Semangka Hydroelectric Project Volume I - Non-Technical Summary Mott MacDonald Singapore Orchard Building, 1 Grange Rd #07-01, Singapore, T F W Drawing Title Figure 2.2 The Project's Main Components 1:35,000 GIS File MM Project No Status Settlements Project Title Scale Proposed Existing PT Tanggamus Electric Power Legend Client 1.5 Km Tunnel Roads Waterway Canal Watercourses HEPP Component Spoil Bank Access Road INF Figure 2.2 The Projects Main Components.mxd Rev P1 Transmission Line

11 Figure 2.3: Currently proposed HEPP general layout Source: Feasibility study for HEPP (2011) and clarification from POSCOEN ( ) 14

12 Blok 06 Blok Lima Legend WS em Facility Building uon g Proposed Blok Empat HEPP Component Temporary Building and Spoil Bank Transmission Line Powerhouse TL111 Existing Blok Tiga Tailrace TL110 TL109 TL108 TL106 TL107 TL104 Blok Dua TL105 TL102 TL103 Settlements Roads TL96 Watercourses Source: Esri, DigitalGlobe, GeoEye, i-cubed, USDA, USGS, AE, Getmapping, Aerogrid, IGN, IGP, swisstopo, TL101 TL99 Blok Satu TL100 TL97 TL98 TL95 WN Simpang Bayur TL94 TL92 TL93 TL90 TL91 Tulangasahan Umbulpisang TL89 TL88 TL86 TL87 TL84 Rajabasa TL85 Sukamarga TL82 TL83 Gunungdoh Talang Maja Banding TL81 TL79 TL78 Sanggi Negeriratu TL76 TL74 Sidomulyo TL72 TL80 TL77 TL75 TL71 TL69 a ngk TL73 TL67 TL65 TL63 e ma S TL62 TL60 W TL70 TL58 TL56 Sribuncoro TL68 Bandarsukabumi TL66 TL64 TL54 TL52 TL61 TL59 Sripurnomo TL57 TL55 TL51 TL53 Srikaton TL50 Fajarbaru gorip Panggul Kunyayan Warudoyong Sudimorobangun Karangagung Kampungbaru Kanoman Sudimoro Pardawas Tugurejo Rawabakung a gk an Kocoguro PT Tanggamus Electric Power Mott MacDonald Singapore Orchard Building, 1 Grange Rd #07-01, Singapore, T F W Semangka Hydroelectric Project Volume I - Non-Technical Summary Kalisari m Se Sedayu Jayu 2 Km Project Title Ranjarnejuro W Sukaraja 1 Client Pardasuka Poncol Banguurejo 0.5 Padangratu Banjarsar Tugure Waykerap Pardasuka 0 Source: Esri, DigitalGlobe, GeoEye, i-cubed, USDA, USGS, AE, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GIS User Community Mott MacDonald. This document is issued for the party which commissioned it and for specific purposes connected with the captioned project only. The accuracy of source data has not been verified and it should not be relied upon or used for any purpose. We accept no responsibility for the consequences of this document being relied upon by any party, or being used for any purpose, or containing any error or omission which is due to an error or omission in data supplied to us by any parties. Jatimulyo Drawing Title Figure 2.4 Transmission Line Layout (Part 1 of 2) Scale 1:75,000 GIS File MM Project No Status INF Figure 2.4 Transmission Line Layout.mxd Rev P1

13 Legend Proposed HEPP Component Transmission Line Existing Settlements Source: Esri, DigitalGlobe, GeoEye, i-cubed, USDA, USGS, AE, Getmapping, Aerogrid, IGN, IGP, swisstopo, Waypanas TL54 TL51 TL49 TL52 TL47 TL45 TL50 TL43 TL40 TL53 TL48 TL38 TL46 TL44 TL35 TL33 TL31 TL25 Payung TL41 TL39 TL29 TL27 TL37 TL24 TL34 TL32 TL30 TL28 TL42 TL22 Pardasuka TL26 TL36 Bandungbaru TL20 Maja TL23 Pardasuka TL18 Pajajaran TL21 Padangratu TL19 TL16 Banjarmasin Penanggungan TL17 Pulaubenawang Lakaran TL15 Sridadi Lamuran TL14 Gedungjambu Wonosoko Sinarsaudata Bayuurjo Bandarkejasian Pagerwajo Jatimulyo Negarabatin Kesugihao Belu Kandangbesi Talang Gening Waygelang Dadisari Dadirejo Roads TL13 Parsasuka Kotabatu Negeriratu Teratas Baros Kelungu Kuripan Watercourses Pleret TL12 TL11 Sukajadi TL9 Kusa Banjarnegeri 0 Cungkung TL10 Surentutung TL8 TL7 TL6 1 2 Km Client Jualang TL5 TL4 TL3 Pasarmadang 0.5 Campangriga Tulunglongo PT Tanggamus Electric Power Mott MacDonald Singapore Orchard Building, 1 Grange Rd #07-01, Singapore, T F W TL2 TL1 W Ngorip Kota Agung Substation Project Title Semangka Hydroelectric Project Volume I - Non-Technical Summary Drawing Title W Se m an gk a Figure 2.5 Transmission Line Layout (Part 2 of 2) Source: Esri, DigitalGlobe, GeoEye, i-cubed, USDA, USGS, AE, Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GIS User Community Mott MacDonald. This document is issued for the party which commissioned it and for specific purposes connected with the captioned project only. The accuracy of source data has not been verified and it should not be relied upon or used for any purpose. We accept no responsibility for the consequences of this document being relied upon by any party, or being used for any purpose, or containing any error or omission which is due to an error or omission in data supplied to us by any parties. Scale 1:75,000 GIS File MM Project No Status INF Figure 2.5 Transmission Line Layout.mxd Rev P1

14 2.4 How were the Project site and technology selected? The Project has been developed with consideration of environmental, social, technical and economic aspects. An iterative selection process was carried out aimed at determining the most viable and least impact option. Various alternatives have been explored relating to technology options, powerhouse site options and transmission line route selection Technologies options The Project has selected a run of river design over the storage reservoir as a result of technical, social, environmental and financial analysis. This solution is usually indicated for small scale hydropower plants, it is particularly ideal for streams or rivers with a minimum dry weather flow and it is less invasive in terms of land occupation compared to the storage reservoir systems Powerhouse site options Three alternatives were considered in order to determine the less impacting and most cost-effective Project layout. Following this selection process, the location of the powerhouse and of the waterway (consisting of an underground tunnel and an open channel) was selected on the right bank of the Semangka River. This alternative was considered the most appropriate due to advantages in terms of cost/benefit considerations Transmission line site selection The routing selection for the 150kV transmission line took into consideration a series of technical and non-technical aspects, including topographical conditions, land use, economic and social displacement and environmental constraints. A desktop review (i.e. using Google earth and relevant maps) was carried out initially to create a proposed route. Further assessment through ground survey was undertaken by a local survey consultant to verify actual conditions and adjustments to create the preferred option. The transmission line will extend approximately 33.4km and cross some private land, but is not expected to result in any physical displacement. It is understood that further adjustments have been and are still being made while the detailed survey is being undertaken to further minimise impacts. 17

15 3. Managing Environmental and Social Impacts 3.1 What are the Project activities that could affect the environment and people? It is recognised that a project of this scale and duration has the potential to impact the environment and the community, both in a beneficial and way. The activities that could cause the most important effects include: Direct and indirect impacts on ecology, especially in the context of river flows and vegetation clearing Impacts on river flows between the weir and powerhouse Impacts on surface and ground water Impacts on soil related to the modification of the local topography (erosion, landslide) Social impacts associated with: Employment generation Workers well-being Community health, safety and well-being Community development (e.g. new roads) Physical and economic displacement. 3.2 How was the Project assessed, and what were the findings? A thorough appraisal has been undertaken for potential impacts arising from the development of the Project, including the above issues; the appraisal has included a detailed Environmental Impact Assessment and Social Impact Assessment (collectively presented as an ESIA). The assessment included: Establishment of the baseline to understand current conditions at and around the proposed Project sites Prediction of impacts Identification of mitigation measures to be included in the design, procedures, development and management of the Project. The appraisal process was supported by local consultation undertaken to ensure that TEP understands and incorporates the concerns of local people from the surrounding villages into the process. The of an impact is described based on a combination of the sensitivity of project affected persons / environmental receptor and the magnitude of impacts. Where possible, impact magnitude and sensitivity are described with reference to legal requirements, accepted scientific standards or accepted impact assessment practice and/or social acceptability. Where the ESIA found that the Project could cause moderate to substantially significant impacts, then actions or procedures (referred to as mitigation measures) have been developed to avoid, reduce or otherwise mitigate the effects and reduce their. A great number of potential impacts can either be avoided or reduced through mitigation; however, some residual environmental impacts may be unavoidable. Each chapter of the ESIA has assessed whether residual impacts, either beneficial or, remain after mitigation. A summary of the key findings of the residual impact and the main mitigation measures identified for each significant social and environmental impact is summarised in Table 3.1 to Table

16 3.2.1 Social management Table 3.1: Social management Construction Recruitment Employment generation Minor beneficial Local recruitment policy Localised disclosure of need for staff and labourers in advance of opportunities arising Job and supply chain opportunities provided to local people Basic skills programme for local and vulnerable affected people Contract clauses for contractors and sub-contractors to hire local people from affected villages and hamlets Procurement of goods and services End of duty and services Weir construction activities Purchase of land Construction of transmission Economic development Demobilisation Relocation of cemetery (10 graves) Ecosystem Services: crops and plantations Land acquisition and livelihoods Local community concern of health impacts to minor beneficial to minor Minor to moderate Minor to moderate Advertising for contracts in local languages Unbundling procurement requests into smaller work packages Longer contract periods for local companies Waiving or lowering of performance bond requirements to local suppliers Using serial contracts or framework agreements, for local contractors or service providers who perform well Setting aside contracts or specific work packages that are only directed to local or national companies Providing price preference as part of the tender evaluation to national companies Developing a Retrenchment Plan prior to any anticipated retrenchment periods whereby the need for workers to be laid off in accordance with Indonesian Law. Cemetery Relocation Plan Prior to draft ESIA disclosure, consultation with affected people, primarily villagers of Tulung Plastik Hamlet Relocation process to be undertaken in a culturally and religiously appropriate manner, as determined through discussions with affected people Chance finds procedure Livelihood restoration planning to comply with IFC PS 5 (LRP) beneficial Minor to moderate beneficial Insignificant to minor Insignificant Insignificant to minor Minor Community consultation and awareness Minor 19

17 line Water circulation Operation Recruitment and transfer of staff Project operation & Taxation Decommissioning Retrenchment Potential for waterborne diseases Minor Ongoing health checks and water quality monitoring Insignificant Employment generation Minor beneficial Recruitment policy Job and supply chain opportunities provided to local people Basic skills programme for local and vulnerable ACs Retrenchment plan Power Generations and Economic Development Loss of employment and reduction in income security of workers, health and safety from decommissioned power plant and transmission line beneficial To be determined in the future During consultations, manage community expectations regarding cheaper or improved electricity access by clearly differentiating between TEP s construction and PLN s operational role Advocate to PLN that Retrenchment plan beneficial beneficial To be determined in the future Hydrology, hydrogeology and water quality management Table 3.2: Hydrology, hydrogeology and water quality management Construction/ Decommissioning (HEPP) Surface water or groundwater chemical contamination (all phases) Sediment load increases in surface water from erosion and surface runoff Decreases in chemical water quality attributes Decreases in physical water quality attributes Major Waste Management Plan Provision of appropriate storage of chemicals, fuel/oil/lubricants and wastes Off-site disposal of wastes including hazardous wastes Compliance with effluent standards Water Quality Monitoring Use of sediment controls such as sand traps, silt fences, erosion control blankets and temporary settling ponds at construction sites Use of designated spoil banks with perimeter sediment drains Machinery will be properly maintained according to manufacturer s specifications 20

18 Realignment of channel and infilling of existing loop in river by weir intake (all phases) Utilisation of surface water for human use (all phases) Dewatering for excavations and tunnelling River geo-morphological change Reduction in surface water availability Reduction in groundwater availability Low to moderate Compliance with effluent standards Water Quality Monitoring Include cross drainage into design of diversion channel to ensure continuity of tributary flows Use of sediment controls such as sand traps, silt fences, erosion control blankets and temporary settling ponds at construction sites Use of designated spoil banks with perimeter sediment drains Machinery will be properly maintained according to manufacturer s specifications Compliance with effluent standards Water Quality Monitoring Provision of environmental flow release for affected channel to maintain ecology and provide for other water users Further consideration be given to the hydrological model calibration to refine the low flows assessment, incorporating data collected from the flow monitoring programme that is ongoing Existing method for determination of environmental flow to be revisited in light of independent hydrological modelling assessment. Undertake excavation best practice to avert opening up pathways that could allow contaminants to migrate to the groundwater Provision of tunnel lining Low to moderate Poorly drained roads / unsurfaced roads Operation Operation of the HEPP/water diversion Alteration of surface water flow between weir and Excessive road drainage and runoff with high sediment loads Fluctuations to sediment load increases during sediment trap releases, but reduction for the rest of the time Changes to natural river flow patterns, reduced water available for other users Major Provide cross drainage structures where building new / rehabilitating roads Surface treatment of road to minimise increase in sediment load Regulating the release of sediment from the sand trap will result in a controlled release of sediment and avoid over flow Provision of environmental flow release for affected channel to maintain ecology and provide for other water users Further consideration be given to the hydrological model calibration to refine the low flows assessment, incorporating data Increased flood risk and damage to Low 21

19 downstream inflow Alteration of surface water flow downstream of scheme Surface water quality alteration from power plant return water Abstraction of groundwater for human use Diversion channel crosses various tributaries downstream areas (dam break following extreme flood) Changes to natural river flow patterns Impact on chemical and physical water quality attributes Reduction in groundwater availability Blockage of tributaries used for irrigation and local supply Construction/ Decommissioning (Transmission line) Surface water or groundwater contamination Sediment load increases in surface water from erosion and surface runoff Operation Decreases in chemical water quality attributes Decreases in physical water quality attributes Major / major / major collected from the flow monitoring programme that is ongoing Regular inspection of dam structural condition to reduce risk of dam failure Existing method for determination of environmental flow to be revisited in light of independent hydrological modelling assessment. Use of sediment controls such as sand traps, silt fences, erosion control blankets and temporary settling ponds at construction sites Machinery will be properly maintained according to manufacturer s specifications Compliance with effluent standards Water Quality Monitoring Establish boreholes and undertake regular groundwater level and quality monitoring to assess the capacity and quality of the resource Consider supplying external water for potable use if capacity is not being met Include cross drainage into design of diversion channel to ensure continuity of tributary flows Waste Management Plan Provision of appropriate storage of chemicals, explosives and wastes Off-site disposal of wastes including hazardous wastes Compliance with effluent standards Water Quality Monitoring Use of sediment controls such as sand traps, silt fences, erosion control blankets and temporary settling ponds at construction sites Machinery will be properly maintained according to manufacturer s specifications Compliance with effluent standards Water Quality Monitoring 22

20 Surface water or groundwater contamination from transformers and capacitors Decreases in chemical water quality attributes Low Undertake regular assessment and maintenance of the transformers and transmission lines Ecology and biodiversity management Table 3.3: Ecology and biodiversity management Construction (HEPP) Construction of HEPP, access roads and ancillary facilities Increased risk of hunting and tree felling at Bukit Barisan Selatan National Park Permanent and temporary habitat loss at the Watershed Protection Forest Permanent and temporary habitat loss and disturbance of terrestrial habitats Permanent and temporary habitat loss Protected flora (fishtail palms) Habitat loss Globally threatened mammal species Permanent and temporary habitat loss of Oliver-backed tailorbird, Javan hawk-eagle and Stork-billed kingfisher Ecological Management Plan (EcMP) Establish no go zones Implement hunting ban for construction/operation staff Install signage highlighting hunting ban Restrict public access on the new road leading to headtank and the southern part of the waterway Raise awareness of construction & operational staff on sensitive habitats within footprint of works and surrounding areas Establish no go zones Refinement of project design to take into consideration local ecological conditions Minimise size of temporary working areas Use water sprays to minimise dust in the dry season Undertake pre-construction botanical surveys of construction sites and refine mitigation for habitats and flora; Employ a local specialist to carry out pre-construction survey Raise awareness of construction & operational staff on sensitive habitats within footprint of works and surrounding areas Habitat Removal and Restoration Plan (HRRP) Low Low to Low Low 23

21 Operation (HEPP) Operation of the HEPP, roads Loss of suitable habitat, risk of injury or death of protected herpetofauna Temporary habitat fragmentation of common species of mammals, birds and aquatic species Temporary loss of habitat, macroinvertebrate mortality Loss of spawning, nursing and feeding habitats Loss of habitat, water quality and fragmentation as a result of the weir construction Changes in water quality, sedimentation, release of contaminants Permanent loss of habitat due to diversion and weir construction Presence of significant new barrier (weir) Increased risk of hunting and tree felling at Bukit Barisan Selatan Low Low Monitoring of the restored or created habitats Comply with the 2:1 land swapping requirement of the Ministry of Forestry Replantation Programme Undertake pre-construction surveys (mammals, birds, reptiles, amphibians) on the footprint of development and surrounding areas by local specialists Where possible, undertake vegetation clearance outside the main breeding season for birds (i.e. not between February and August) Fence or cover any open pits, trenches and excavations at night to prevent animals falling in Refinement of project design to take into consideration local ecological conditions Minimise size of temporary working areas Where possible, undertake vegetation clearance outside the main breeding season for birds (i.e. not between February and August) Minimise working areas Implement adequate pollution prevention measures Implement sediment control measures (e.g. sediment traps) Maintain riparian vegetation where possible Implement fishing ban on construction workforce Undertake monitoring of water quality during and postconstruction Consider the installation of fish pass as part of the detailed design to allow fish to bypass the new barrier Include filters at the intake to prevent aquatic fauna entering the waterway Identify and implement additional mitigation if the fish pass and/or intake filters are not efficient Ecological Management Plan (EcMP) Low Low Low Low Low Low Major Low 24

22 and ancillary National Park facilities Construction (Transmission line) Construction of TL, roads and ancillary facilities Operation (Transmission line) Operation of the transmission line, roads and ancillary facilities Increased risk of hunting and tree felling at Bukit Barisan Selatan National Park Permanent and temporary habitat loss and disturbance at the Watershed Protection Forest Permanent and temporary loss and disturbance of terrestrial habitats Habitat loss of globally threatened mammal species Loss of foraging and breeding habitat of common species of mammals and birds Loss of foraging of Rhinoceros hornbill Temporary habitat fragmentation of common species of mammals and birds Habitat loss of Southern red muntjac deer and/or trapped in excavations Increased risk of hunting and tree felling at Bukit Barisan Selatan National Park Low to Low Low Establish no go zones Implement hunting ban for construction/operation staff Install signage highlighting hunting ban Ecological Management Plan (EcMP) Establish no go zones Implement hunting ban for construction/operation staff Install signage highlighting hunting ban Raise awareness of construction & operational staff on sensitive habitats within footprint of works and surrounding areas Establish no go zones Refinement of project design to take into consideration local ecological conditions Minimise size of temporary working areas Use water sprays to minimise dust in the dry season Undertake pre-construction botanical surveys of construction sites and refine mitigation for habitats and flora; Employ a local specialist to carry out pre-construction survey Raise awareness of construction & operational staff on sensitive habitats within footprint of works and surrounding areas Habitat Removal and Restoration Plan (HRRP) Monitoring of the restored or created habitats Comply with the 2:1 land swapping requirement of the Ministry of Forestry Replantation Programme Fence or cover any open pits, trenches and excavations at night to prevent animals falling in Implement hunting ban for construction/operation staff Install signage highlighting hunting ban Restrict public access on the new road leading to headtank and the southern part of the waterway Low Low Low Low Low Low 25

23 Vehicle movements Maintenance of vegetation height permanent loss of habitat at Watershed Protected Forest Permanent fragmentation of terrestrial habitats Death or injury of Rhinoceros hornbill by electrocution from transmission line Death or injury of other birds from collision with transmission line Dust deposition and run-off of all habitats Noise disturbance and collision of mammals Noise disturbance and collision of birds Low Habitat Removal and Restoration Plan (HRRP) Low Install bird deflectors on pylons and conductors Monitor bird collision in the first year after construction Low Low Low Use water sprays to minimise dust in the dry season Minimise where possible noisy night time working Use low light directional lighting to minimise light pollution Regular inspection and maintenance of plant and equipment Maintain compliance with national noise standards Geology, landslides and seismic risks Table 3.4: Geology, landslides and seismic risks Slopes loading by new structures Decreased slope stability during construction Decreased slope stability during operation Major Ensure properly designed temporary work Ensure that contract encourages flexibility to adapt to unexpected ground conditions Limit water infiltration on freshly de-vegetated slopes Siting of temporary buildings (i.e. construction accommodation & Residual Low offices) should avoid high risk locations Decreased slope stability during Low Low decommissioning Ensure all earth works and structures are designed and Cuttings Slope stability during construction Major constructed to international standards 26

24 Residual Slope stability during operation Low Slope stability during decommissioning Low Low Tree felling Increased infiltration during construction Construction of sediment controls Habitat Removal and Restoration Plan (HRRP) Increased infiltration during operation Low Increased infiltration during decommissioning Low Low Seismic Damage and failure of structures during construction Major Mitigation to prevent a large scale fault movement is unfeasible. To limit the hazard, development should be prohibited within the Major Damage and failure of structures during operation Major total failure zone of the dam burst assessment. Major Reduced river flow Damage and failure of structures during operation Reduction in erosion during construction Construction of sediment controls Reduction in erosion during operation Low Low (beneficial) Increased trafficking of roads Slope failure during construction Ensure all road works are designed and constructed to international standards Slope failure during operation Low Slope failure during decommissioning 27

25 3.2.5 Noise and vibration management Table 3.5: Noise and vibration management Construction (HEPP) Construction of access roads Construction of weir Construction of other project components Dumping at spoil bank Noise nuisance at the following receptors: Tuguratu Umbul Bawaylaga Settlements 1, 2, 4, 5, 7,8 and 9 Umbul BatuTampah Major Limit vehicle speed on site (e.g. 10 km/hr as indicated in TEP s Total Environmental Management Plan) Ensure that all vehicles and plant on site are not left running unnecessarily Use properly maintained and modern vehicle/construction fleet only Umbul Kuyung Umbul Seno Position plant as far from the edge of the site as possible Machines and plant used intermittently should be shut down Noise nuisance at Settlement 6 between work periods or throttle to a minimum Noise nuisance at Worker s camp Low Screen sensitive receptors from noise 1 and 2 Plant with directional noise features should be positioned away Noise nuisance at Settlement 3 Critical from sensitive receptors to minimise noise disturbance Major Hours of general construction activity should be restricted to Noise nuisance at Settlements 4 to 9, along with Umbul Kalipasir Noise nuisance at Worker s camp 2 Critical avoid sensitive periods of the day and also to avoid night working Where possible, the use of the Excavator Mounted Breaker should not be simultaneously running with other noisy equipment and its use should be avoided during sensitive times from the complex and other specific measures for the Workers camp should be considered Implementation of non-engineering measures, such as: Major Low Noise nuisance at Worker s camp Low 1 & 2 of the day. If possible the breaker should be located furthest Noise nuisance at Settlements 6 Noise nuisance at Settlements 9 Critical away from receptors, behind construction buildings or other screens Scheduling of activities, should be amended based on monitoring results / complaints received if required Noise protection (e.g. noise screening), siting of activities away Low Major 28

26 Construction traffic Construction (Transmission line) Construction of transmission towers Noise nuisance at Tuguratu, Umbul Bawaylaga, Settlements 2 and 4 Noise nuisance at the following receptors: Umbul Kalipasir Maja Pajajaran Cungkung Jujalang Talang Asahan Talang Maja Critical Major Critical Informing the community of changes to the construction programme or noisy activities Community grievance mechanism to cater for complaints More receptor specific measures include: Physical mitigations at the weir construction site to reduce noise impact to Settlement 3 Rigours application of mitigation at work areas which are close to Settlement 4 to 9 Mitigate noise impact from the spoil bank area to Settlement 9 Scheduling to avoid sensitive hours (night time, school hours) and minimise accumulation of vehicle trips within a short timeframe Consideration of alternative route to avoid sensitive areas Use of multiple links to minimise the intensity of traffic on individual links Proper maintenance of vehicles, ensure silencers are fitted and vehicles comply with emission standards Avoid queuing vehicles on the access road or at the site access points Avoid unnecessary revving of engines and use of horns Minimise changes in the profile of the road to avoid body slap and rattle noise Plan work for the transmission towers such that the cumulative impact due to simultaneous construction of more than one tower is minimised Major Major () [1] 29

27 Construction traffic Operation (HEPP) Operation of the HEPP Operational traffic GunungDoh Banding BandarSukabumi (Western and eastern cluster) Payung Sukajadi Operation (Transmission line) Operation of the transmission line Noise nuisance None House near powerhouse (within Settlement 9) Noise nuisance from operation traffic Noise nuisance from maintenance and traffic Decommissioning (Transmission line) Dependant on the noise levels of the powerhouse, residual impact could be reduced to if noise emitted is reduced to levels similar prescribed in Table 9.9 of Volume II ESIA Ancillary plant should be of low noise design and employ sound attenuation techniques where required Treating buildings with acoustic absorption materials, where necessary Hours of general maintenance activity restricted to avoid sensitive periods of the day (religious events) and also to avoid night working Closing plant building doors at all times (wherever practicable) Turbines and associated plant acoustic enclosures should be used where appropriate Generators and transformers - sound attenuation techniques such as insulation, enclosures, three-sided pens, low speed fans and low noise trims should be used where necessary Turbine hall and other work areas - noise should not exceed the upper exposure action values specified in the contract Further assess the impact and mitigation required for the housing in the Power House area None None Dependant on the noise levels of the powerhouse, residual impact could be reduced to if noise emitted is reduced to levels similar prescribed in Table 9.9 of Volume II ESIA 30

28 Project decommissioning Note: Noise nuisance from maintenance and traffic To be re-assessed at decommissioning planning, but assumed. [1] The residual could be reduced to from Critical if the cumulative duration of >1 month from multiple tower construction is avoided Air quality management Table 3.6: Air quality management Construction (HEPP) Construction of access roads Construction of weir Construction Dust nuisance at Pongkalan Low Minimising dust from material handling and Dust nuisance at Tuguratu Umbul Bawaylaga Umbul BatuTampah Umbul Kuyung Umbul Seno and Settlements 1, 2, 3, 4, 5, 7, 8 & 9 storage sources such as conveyors and bins by using covers and/or control equipment (water suppression) Dust emissions from drilling activities and processing equipment (eg crushers, grinders, screens) should be adequately Settlement 6 controlled through dust collectors, wet Low processing, or water spraying Umbul Lapan Low Exposed surfaces should be vegetated promptly, otherwise, exposed surface Dust nuisance at Settlement 3 Major should be rendered non-dust forming, such Dust nuisance at Worker s Camp 1 Spoil bank Dust nuisance at Worker s Camp 1 as by covering with a canvas Manage stockpiles by: Minimising dust from open area sources by installing enclosures and covers, and Low Low Low Dust nuisance at Settlement 6 increasing the moisture content A simple, linear layout for materialshandling Low Dust nuisance at Settlement 9 Dust nuisance at Worker s Camp 2 Major Major operations will be applied to reduce the need for multiple transfer Construction of tunnels Dust nuisance at Umbul Seno points should be designed and installed Low 31

29 Crushing plant & concrete batching plant Construction Dust nuisance at Umbul Lapan Dust nuisance at Settlements 4, 5, 7, 8 and 9, Worker s Camp 2&UmbulKalipasir Major Construction traffic Dust nuisance at Tuguratu, Umbul Bawalaga, Umbul BatuTampah, Umbul Kuyung, Settlements 1, 2, 4, 5 & 7 Major (eg processing plants should be preferably located within the extraction area) Manage crushing plant and concrete batching plant Cover or enclose conveyor belts and hoppers Enclose the loading bay and clean up spills immediately Develop and implement an inspection regime for all dust control components Dust suppression techniques should be implemented, such as applying water or Low non-toxic chemicals to minimise dust from Settlement 6 Major vehicle movements Pongkalan & Umbul Lapan Internal roads should be adequately Low compacted and periodically graded and maintained Implement speed restrictions (e.g.10km/hr) A wheel washing bay should be implemented and maintained for vehicles leaving the construction site Ensure all vehicles carrying loose or potentially dusty material to or from the site are fully sheeted Schedule deliveries of materials such that the number of vehicles passing through the settlement areas during peak hours of activities in residential areas is minimized Explore possible options of route diversion such that vehicles delivery routes avoid residential areas as much as possible 32