E2711 V2 rev
WORLD BANK PROJECT Public Disclosure Authorized
ENVIRONMENT IMPACT ASSESSMENT REPORT FOR
URUMQI DISTRICT HEATING PROJECT SHAYIBAKE DISTRICT HEATING NETWORK COMPONENT Public Disclosure Authorized
Public Disclosure Authorized
Xinjiang Environmental Technology Consulting Center 2011.1
Public Disclosure Authorized Project Name: Urumqi District Heating Project Project Leader: Xu Yan (Certificated EIA Engineer: A40040130600 EIA Team:: Xinjiang Environmental Technology Consulting Center Legal Representative: Zhou Wei Environmental Impact Assessment Report for Component 1 of UDHP: SHN
CONTENTS
PREFACE...... 3
1. INTRODUCTION ...... 4
1.1 Background ...... 4 1.2 EIA Overview...... 4 1.3 Assessment Scope, Protection Objectives, Period and Key Issues ...... 5 1.4 Relevant Laws, Regulations, Technical Guidelines and Standards...... 6
2. PROJECT DESCRIPTION...... 10
2.1 Project Overview...... 10 2.2 Construction Contents ...... 11 2.3 Associated Facilities and Activities...... 16
3. ENVIRONMENTAL AND SOCIETAL BASELINE...... 17
3.1 Natural Environment and Environmental Quality ...... 17 3.2 Societal and Economic Status...... 28 3.3 Current Air Pollution Control and Management...... 30 3.4 Respiratory Disease Status...... 36 3.5 Key Environmentally Sensitive and Social Protection Areas...... 37
4. ENVIRONMENTAL IMPACT ASSESSMENT ...... 41
4.1 Impact Assessment during the Construction Phase...... 41 4.2 Impact Assessment during the Operation Phase ...... 46 4.3 Cumulative impacts of the two components...... 50
5. INFORMATION DISLOSURE AND PUBLIC CONSULTATION...... 52
5.1 Objectives, Scope and Approaches ...... 54 5.2 Process of Announcement and Consultation ...... 54 5.3 Results and Feedbacks...... 59 5.4 Conclusions of Public Consultation ...... 61
6. ANALYSIS OF ALTERNATIVES...... 62
6.1 Alternatives of “With” and “Without” Project ...... 62 6.2 Alternatives of Project Locations...... 62
à L Environmental Impact Assessment Report for Component 1 of UDHP: SHN
6.3 Alternatives of Technology and Techniques ...... 64 6.4 Alternatives of Heating Fuels ...... 65
7 ENVIRONMENTAL MANAGEMENT PLAN ...... 67
7.1 Organizations and Responsibilities ...... 67 7.2 Mitigation Measures...... 70 7.3 Environmental Monitoring Plan and Budget ...... 77 7.4 Environmental Training Program...... 79 7.5 Supervision and Reporting Mechanisms ...... 80
8. ASSOCIATED FACILITIES AND ACTIVITIES ...... 85
8.1 Heat Sources ...... Error! Bookmark not defined. 8.1 Current Status of Heat Sources and the Rectification ...... 85 8.2 Environmental Problems and Management of Small Boiler Closure ...... Error! Bookmark not defined.
9. CONCLUSIONS...... 90
9.1 Project Specification...... Error! Bookmark not defined. 9.2 Key Environmental Issues ...... Error! Bookmark not defined. 9.3 Environmental Benefits ...... Error! Bookmark not defined. 9.4 Integrated Conclusions ...... Error! Bookmark not defined.
10 REFERENCES AND ANNEX ...... ERROR! BOOKMARK NOT DEFINED.
10.1 References...... 90 10.2 Annex...... 92
à LLà Environmental Impact Assessment Report for Component 1 of UDHP: SHN
PREFACE The concentration of sulfur dioxide and dust significantly exceeds the standards during the heating season in Urumqi, which indicates the coal-smoke pollution. According to the “Urban Heating Plan of Urumqi (2006-2020)”, the Urumqi government proposed a centralized space heating system supplied by Cogeneration of Heat and Power (CHP) plants. The government has initiated Urumqi District Heating Project (UDHP) and applied for the World Bank loan. The CHP includes two components: Component 1: Shayibake District Heating Network Component (SHN) Component 2: Urumqi CHP Shuimogou District Heating Network (UHN) The two components, which are municipal infrastructure projects, are relatively simple and not related to major physical works. The environmental impacts of such project are limited. According to relevant requirements of domestic environmental impact assessment (EIA), Environmental Impact Forms were prepared for the two components. The two forms were reviewed and approved in 2008 and 2010 respectively (see Table 0.1-1). Table 0-1 The Approvals of Domestic EIAs Project Type of EIA EIA Approval Approval time No. Approval document name document Agency Xinjing Department January, 2010 Environmental XinHuanPingHanSh 1 UHN of Environmental Impact Form en No. {2010}14 Protection Former Autonomous December, 2008 Environmental Regional XinHuanJianJianHa 2 SHN Impact Form Environmental n No. {2008}168 Protection Bureau
In December 2009, The Xinjiang Environmental Technology Consulting Center (XETCC) was commissioned by the Project Office of Urumqi Heat Reform and Building Energy Efficiency (HRBEE) International Technological Cooperation (POUITC) to prepare two EIA Reports for the components to submit to the World Bank in light of domestic Technical Guidelines of EIA and requirements on EIA in the World Bank safeguard policies. Being commissioned, The XETCC collected relevant information and investigated the proposed sites and the circumstances of the two components. The XETCC analyzed the project features, construction specifications, scales, technologies, main pollution factors and potential environmental impacts, and composed the “EIA Report for Component 1 of Urumqi District Heating Project: Shayibake District Heating Network Component” and the “EIA Report for Component 2 of Urumqi District Heating Project: Urumqi CHP Shuimogou District Heating Network”. In addition, an EIA Executive Summary was also prepared. This document is the “EIA Report for Component 1 of Urumqi District Heating Project: Shayibake District Heating Network Component”. The EIA team would like all those agencies for their support and help, including the Xinjiang Department of Environmental Protection (XDEP), the Urumqi Municipal Construction Commission, the Urumqi Municipal Environmental Protection Bureau (UMEPB), the POUITC, the Urumqi Management Office of Heating Industry, the Urumqi District Heating Company (UDHC), EIA teams of the two component, feasibility study teams of the two components and the World Bank China office.
à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
1. INTRODUCTION
1.1 Background
As Urumqi has been experiencing urban expansion, rapid population growth and economic growth in the past decade, industrialization and urbanization have been promoted. In this context, energy consumption would increase significantly. The energy constrains on economic development and energy related environmental issues would become more evident. The concentration of sulfur dioxide and dust significantly exceeds the standards during the heating season in Urumqi, which indicates a typical coal-smoke pollution. The air pollution directly affects human health, traffic safety and sustainable economic development in Urumqi. According to the “11th Five Year Plan for National Economic and Social Development of China”, the “Medium and Long Term Special Plan of Energy Conservation of China”, the “Urban Heating Plan of Urumqi (2006-2020)”, the Urumqi government took the resource advantages and environmental features of the city into account and proposed a centralized space heating system supplied by Cogeneration of Heat and Power (CHP) plants. Then, the government decided to initiate the Urumqi District Heating Project (UDHP) and applied for the World Bank loan. When the centralized heating and CHP are implemented as proposed in this project, the energy efficiency would be enhanced and air pollutant emissions would decreases, so that the ambient air quality could be improved, which would help to reach the goal of moderately prosperous society.
1.2 EIA Overview
1.2.1 Objectives of EIA In accordance with the “Law of the People's Republic of China on Environmental Impact Assessment”, the “Ordinance on Administration for Environmental Protection of Construction Projects”, “Circular about Strengthening the Management of Environmental Impact Assessment for Construction Projects Funded by the International Financial Organizations” and the World Bank Safeguard Policies as well as the procedures of domestic EIA and the World Bank’s EIA, the EIA team of this project assessed and concluded the positive effects of this project, identified, screened, predicted and analyzed the negative impacts, and proposed practical and effective mitigation measures for those inevitable impacts and environmental management plan. This EIA will be submitted to the World Bank and become one of the bases of their independent evaluation of this project. Meanwhile, this EIA will also be the basis of decision-making and integrated management of the government and the environmental management agency. 1.2.2 EIA Category In light of the “Circular about Strengthening the Management of Environmental Impact Assessment for Construction Projects Funded by the International Financial Organizations” (HuanJian[1993]No. 324) and requirements on EIA in OP4.01 of the
à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
World Bank Safeguard Policies, assessment factors were identified and screened in this EIA. Shayibake District Heating Network Component (herein after “SHN”) pertains to centralized heating energy efficiency retrofitting project, which refers only to renovation, maintenance and updating. Generally speaking, the period of such project is short. Mature and reliable techniques are often applied to such project. The pollutant emissions are easy to control and the affected area is limited. Therefore, domestic EA category for this project assigned by Urumqi Environmental Protection Bureau (EPB) was EA form, which is simpler than EA report. However, according to updated World Bank requirements, a Category A EIA is required for this project. 1.2.3 Preparation of the EIA Report Being commissioned, the Xinjiang Environmental Technology Consulting Center (XETCC) collected relevant information and investigated the proposed sites and the circumstances of the SHN. The XETCC analyzed the project features, construction specifications, scales, technologies, main pollution factors and potential environmental impacts, and composed the Terms of References (ToR) for the EIA of this project that had been submitted to the World Bank. Then, the “EIA Report for Component 1 of Urumqi District Heating Project: Shayibake District Heating Network Component” was prepared based on the ToR.
1.3 Assessment Scope, Protection Objectives, Period and Key Issues
1.3.1 Assessment Scope and Protection Objectives The assessment scope of this project is: (1) In light of the Technical Guidelines of EIA, the basic assessment scope is identified on the basis of the proposed assessment class. (2) The environmental protection objectives and the concerned objects in the safeguard policies shall be included in the assessment scope if they are close to the basic assessment scope. (3) The areas that may be affected by the projects and activities related to the SHN shall be integrated into the assessment scope. The assessment scope and environmental protection objectives are shown in Table 1.3-1. Table 1.3-1 The Assessment Scope No Environmenta Assessment Scope Environmental Protection Objectives . l Factor The surrounding regions The residential, study and working areas of people of heating pipeline sensitive to air pollution, e.g., government agencies, network, pressure-isolated 1 Ambient air research and education areas, enterprises and heat exchange stations and institutions, schools, hospitals, sanitarium, resorts and substations with a radius office buildings, etc. of 200m The 100m upstream and Surface water 500m downstream of the 2 Surface water system and artificial canals. environment node where the heating pipeline runs across rivers The 200m regions away The residential, study and working areas of people Acoustic 3 from the heating pipelines sensitive to noise, e.g., government agencies, research environment and the surrounding and education areas, enterprises and institutions,
à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
regions of pressure- schools, hospitals, sanitarium, resorts and office isolated heat exchange buildings, etc. stations and substations with a radius of 100m Ecological The 200m regions away Natural and artificial greens, parks, attractions, 4 environment from the heating pipelines orchards and cultural heritages. The 100m regions away from the heating pipelines and the surrounding Social and economic actors in affected areas, e.g. Societal 5 regions of pressure- institutions, enterprises, residential areas, cultural and issues isolated heat exchange education areas, hospitals and commercial areas. stations and substations with a radius of 100m
1.3.2 Assessment Period This EIA analyzes issues in two phases, viz. the construction phase and the operation phase of this project. 1.3.3 Key Issues of the EIA Table 1.3-2 presents the key issues assessed in domestic EIA. Table 1.3-2 Key Issues of the EIA
Project name Contents of the EIA Key issues Format
(1) Collect data of regional environmental quality, conduct monitoring and assess the environmental (1) Impacts of heat baseline. exchange stations and (2) Analyze the impacts of heat exchange pipelines on the public. Component stations and pipelines on surface water, Environmental (2) Impacts of noise of 1 SHN ambient air, ecological environment and Impact Form heat exchange stations acoustic environment during the on nearby residential construction phase and the operation areas. phase. (3) Conduct environmental supervision during the construction phase.
According to the World Bank’s policies, the key issues of this EIA include information disclosure, public consultation and environmental management plan.
1.4 Relevant Laws, Regulations, Technical Guidelines and Standards
The basis of this EIA include relevant plans of Urumqi, domestic laws, regulations and standards and the World Bank’s environmental and social safeguard policies. 1.4.1 Domestic Laws and Regulations The laws and regulations that are based for this EIA are shown in Table 1.4-1.
Table 1.4-1 List of Laws and Regulations
à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
Time of No. Title Document No. Implementation/Com posing Environmental Protection law of the People’s No. 22 Presidential 1 1989.12.26 Republic of China Decree The Law of the People's Republic of China on 30th Meeting of 9th 2 2003.9.1 Environmental Impact Assessment NPC The Law of the People's Republic of China on 15th Meeting of 9th 3 the Prevention and Control of Atmospheric 2000.9.1 NPC Pollution The Law of the People's Republic of China on 32nd Meeting of 4 2008.6.1(Amended) Prevention and Control of Water Pollution 10th NPC The Law of the People's Republic of China on 22nd Meeting of 8th 5 Prevention and Control of Pollution From 1997.3.1 NPC Environmental Noise The Law of the People's Republic of China on 13th Meeting of 6 Prevention of Environmental Pollution Caused 2005.4.1(Amended) 10th NPC by Solid Waste No. 74 Presidential 7 Water Law of the Peoples Republic of China 2002.10.1(Amended) Decree The Law of the People's Republic of China on 20th Meeting of 7th 8 1991.6.29 Water and Soil Conservation NPC Cleaner Production Promotion Law of the No. 72 Presidential 9 2003.1.1 People's Republic of China Decree Energy Conservation Law of the People's No. 90 Presidential 10 2008.4.1 Republic of China Decree The Law of Land Administration of the No. 8 Presidential 11 2004.8.28 People's Republic of China Decree City Planning Law of the People's Republic of 11th Meeting of 7th 12 1989 China NPC Ordinance on Administration for No. 253 Decree of 13 Environmental Protection of Construction 1998.11.29 the State Council Projects Classified Management Lists for No.2 Decree of the Environmental Protection of Construction Ministry of 16 Projects (Promulgated by the Ministry of 2008.10.1 Environmental Environmental Protection of the People’s Protection Republic of China Interim Procedure on the Public Participation HuanFa[2006]No. 17 2006.2.14 In Environmental Impact Assessment 28 Circular about Strengthening the Management of Environmental Impact Assessment for HuanJian[1993]No 18 1993.6.21 Construction Projects Funded by the .324 International Financial Organizations Regulations on Development of Thermal- JiJiChu[2000]No. 19 2000.8.25 power Cogeneration 268 The State Council’s Decision About GuoFa[2006]No. 20 2006.8 Strengthening Energy Conservation 28 Several Opinions of State Council to Further GuoFa[2007]No.3 21 Promote Economic and Social Development in 2007.3 2 Xinjiang Guidance on the Pilots of Urban Heat System JianCheng[2003]N 22 2003.7.21 Reform o. 148 Environmental Protection Regulations of 2005.05.27(Amended 23 Xinjiang ) 24 Xinjiang Government’s Notice of Key 2000.10.31
à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
Time of No. Title Document No. Implementation/Com posing Prevention Zones, Monitoring Zones and Remediation Zones of Soil Erosion 25 Ecological Zoning of Xinjiang 2003.9 Water Environmental Function Zoning of XinZhengHan[200 26 2003.10 Xinjiang 2]No. 194 14th Meeting of Regulations of Urumqi on the Prevention and 10th People’s 27 2005.3.1 Control of Atmospheric Pollution Council of Xinjiang Administration Measures of Urmqi on 28 Prevention and Control of Atmospheric 2008.12.30 Pollution Supervision and Administration Measures of No. 84 Decree of 29 Urumqi on Pollutant Emissions from Xinjiang 2007.3.1 Automobile Government Circular of Forwarding the “Opinions on Promoting CHP to Fundamentally Resolve Air WuZhengBan[200 30 2006.12 Pollution in Urumqi” (Document promulgated 6]No. 91 by the Urumqi Government) No. 48 Decree of Administration Measures of Urumqi on Urban 31 People’s 2002.12.5 Construction Waste Government Circular about Establishing the Leading WuZhengBan[200 32 Committee of Urumqi Centralized Heating 2009.12.17 9]No. 312 Energy Efficiency Retrofitting Project Notice about Air Pollution Control of Wuzhengtong 33 Corporations including Xinjiang Xinlian 2010.3.19 [2010]No.29 Thermal Co. Ltd. within a Time Limit
1.4.2 Technical Guidelines and Standards (1) Technical Guidelines Technical guidelines for environmental impact assessment-General principles (HJ/T2.1-2.3-93) Technical guidelines for environmental impact assessment- Atmospheric environment (HJ 2.2-2008) Technical guidelines for environmental impact assessment- Surfacewater environment (HJ/T 2.3-93) Technical guidelines for noise impact assessment (HJ 2.4-2009) Technical guidelines for environmental impact assessment- Ecological environment (HJ/T19-1997) Technical Guidelines for Environmental Risk Assessment on Projects (HJ/T169-2004) Technical Code on Comprehensive Control of Soil Erosion (GB/T16453.1-6- 96) Standards for Classification and Gradation of Soil Erosion (SL190-2007) Technical Code on Soil and Water conservation of Construction Projects (GB50433-2008) (2) Standards Ambient Air Quality Standard (GB3095-1996) and its revised lists
à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
Environmental quality standards for noise (GB3096-2008) Environmental Quality Standard for Surface Water (GB3838-2002) Standards for Classification and Gradation of Soil Erosion (SL190-2007) Integrated Emission Standard of Air Pollutants (GB16297-1996) Emission Standard of Air Pollutants for Coal-fired Boiler (DB65/ 2154-2010) Integrated Wastewater Discharge Standard (GB8978-1996) Noise Limits for Construction Site (GB12523-90) Emission Standard for Industrial Enterprises Noise at Boundary (GB12348- 2008) Standard for Pollution Control on the Security Landfill Site for Hazardous Wastes (GB18598-2001) Standard for Pollution Control on Hazardous Waste Storage (GB18597-2001) Standard for Pollution Control on the Storage and Disposal Site for General Industrial Solid Waste (GB18599—2001) Standard for Pollution Control on the Landfill Site of Municipal Solid Waste (GB16889-2008) 1.4.3 Environmental and Social Safeguard Policies of the World Bank (1) OP 4.01 Environmental Assessment; (2) BP17.50 Information Disclosure 1.4.4 Project Documents (1) Outline of Urban Master Plan of Urumqi (2009-2020) (2) Urban Heating Plan of Urumqi (2006-2020) (3) Adjustment and Implementation Plan of Energy Structure for Heating of Urumqi (2010-2015), 2010.1 (4) Energy Development and Conservation Plan of Urumqi (2008-2015), 2009.5.8 (5) Thermal- Power Cogeneration Plan of Urumqi (2008-2020) (6) The Prevention and Control Plan for Air Pollution of Urumqi (2008-2020), 2008.8 (7) Prevention and Control Strategy for Air Pollution of Urumqi, Tsinghua University, Peking University, etc. 2008.12 (8) Prevention Program for Air Pollution in Winter of Urumqi (2010-2015), UMEPB, 2009.9 (9) Feasibility Study of Shayibake District Heating Network, Beijing Gas and Heating Engineering Design Institute, 2010.11 (10) Environmental Impact Form of Shayibake District Urumqi CHP Heating Network, XETCC, 2008.12 (11) Approval Comments on the “Environmental Impact Form of Shayibake District Urumqi CHP Heating Network”, XinHuanJianJianHan[2008]No.168, Former Xinjiang Environmental Protection Bureau, 2008.12 (12) Noise Zoning of Urumqi On the Basis of “Standard of Environmental Noise of Urban Area”, UMEPB, 2003.6
à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
2. PROJECT DESCRIPTION
2.1 Project Overview
2.1.1 Project Name, Type and Location Project name: Shayibake District Heating Network Component (herein after “SHN”) The owner: The Project Office of Urumqi Heat Reform and Building Energy Efficiency (HRBEE) International Technological Cooperation (POUITC) Project type: Newly building Location: concentrated in Shayibake District and Tianshan District of Urumqi. The project location is shown in Figure 2.1-1. 2.1.2 Project Specification The project contents are specified in Table 2.1-1. Table 2.1-1 Project Specification of Component on SHN Construction Sub-project Notes Contents Heating parameter 135/80 L1 pipeline network 27.068 km Maximal diameter: DN1200 Pipeline network Heating parameter 120/70 L2 pipeline network 12.59 km Maximal diameter: DN1000 Pressure-isolated New pressure-isolated Utilizing existing boiler room in heat exchange 1 heat exchange station the Lantian Substation station
Heat metering Add metering station at 1 station Hongyanchi CHP plant New substations 22 Newly building Renovating existing boiler Renovated substations 28 rooms and heat supply stations Substation
2.1.3 Staffing To facilitate the management of the heating network, a Sayhagh District Branch Heating Company will be incorporated right after the project is completed. The branch is affiliated to the UDHC. Staffing of the company consists of operation personnel, control center personnel, technical management personnel and administration personnel of the substations, pressure-isolated heat exchange stations and heating network. The total number of workers will be 280.
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
2.1.4 Project Cycle March- November, 2010: Construction of pipelines along Yanerwo Road and Saimachang Road and the pipeline from the thermal power plant to Hetan Road, and along the trunk of National Highway No.312 in Shayibake District, and the construction of some substations and branch pipelines in southern Tianshan District as well as the metering station at the exit of thermal power plant. March- October, 2011: construction of pressure-isolated heat exchange stations, L2 heating pipeline network and substations and branch pipelines in the north area to the Outer Ring Road. 2010: construction of branch pipelines for planned users, purchasing Guanghui Boiler Room and improvement of monitoring and controlling system; November – December: completion of heating system commissioning; the connected operation with peak balancing heat source. 2.1.5 Project Investment and Finance The total fund of this component is RMB 973.79 million, including construction investment RMB 957 million, interest during the construction phase RMB 138.7 million and liquidity RMB 9.74 million. 30% of the investment will be funded by the owner themselves and 70% will come from the World Bank loan and domestic commercial bank loan.
2.2 Construction Contents
According to the “Urban Mater Plan of Urumqi” and the “Urban Heating Plan of Urumqi”, the heating area of this project goes northward to flyover of Xihong Road, eastward to Hetan Road, westward to Yamalike Hill, and southward to special railway of Hongyanchi Power Plan and parts of the areas in the east of Yanan Road in Tianshan District. Residential areas, offices, education areas, commercial areas, financial areas and industrial areas are located in the project region. The heating area covers about 14,740,000 m2. The heat load is 1011.4 MW. The heating area is shown in Figure 2.2-1. 2.2.1 Main Construction Contents The heating pipeline network will be laid along the special railway of power plan and civil roads. No building dismantlement is needed. The pressure-isolated stations will be built on the basis of existing boiler rooms. No land acquisition is needed. 2.2.2 Heating Pipeline Network The heating pipeline network consists of three levels of networks. L1 heating network is the transmission network from the UTPP to the pressure-isolated heat exchange station. L2 heating network is the distribution network from the pressure- isolated heat exchange station to substations. L3 heating network is from thermal power stations to user’s indoor heating system. The L1 heating pipeline network of this project is 27.068 km including 9.7 km trunk pipelines. The length of L2 heating pipeline network is 12.59 km including 4.3 km trunk pipelines. The heating pipeline network from the thermal power plant to pressure-isolated heat exchange station and users’ heat exchange stations will be
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN directly buried. The pipeline that goes out of the thermal power station and passes the special railway of the power plant and the one that passes Hetan Road will be laid overhead. (1) L1 pipeline network (thermal power plant- pressure-isolated heat exchange station) The trunk line will goes out from the northwest of the rebuilt Guodian Hongyanchi Thermal Power Plan. Along the precast plant- railway of the power plant- Bahuliang Qizu Village, Dawan Country- Yanerwo Road- Hetan Express Road- Huochang Road at southern suburban area- Yanshan Mid. Road (National Highway No.312)- Outer Ring Road- boiler rooms of Lantian Thermal Company (the pressure-isolated heat exchange station will be built here). Along precast plant- passing the railway of power plant- Bahuliang Qizu Village, Dawan Country- Yuyuan Road- Saimachang Road- Yanerwo Road- Water Park. (2) L2 pipeline network (pressure-isolated heat exchange station- substations) The L2 heating network of this project goes from the pressure-isolated station to Yining Road- Changjiang Road- Helongjiang Road- Baoshan Road- Youhao Road. The L2 pipeline will be connected with boiler rooms of Lantian Substation, Mianmayinxing, Shiyue Guanghui and Jindu Storage. The pipeline will diverge into trunk and branch lines at Qitai Road and be connected with Haoyi Substation, Xijiang Post Heat Supply Station, Yutian Street Heat Supply Station, Huanghe East Road Heat Supply Station and boiler rooms of Municipal Central Post Bureau and Commercial Department, etc. The connector with heating network in southern areas will be reserved. Figure 2.2-2 The heating pipeline network of the SHN 2.2.2 Pressure-Isolated Heat Exchange Station One new pressure-isolated heat exchange station will be built in the SHN, which will be located at 12km southwest of the UTPP, the south of the East Extension of Suzhou Road and 2km west of Qidaowan Road. The pressure-isolated heat exchange station will cover an area of about 3.5hm2. Its designed pressure is 2.5MPa. The main equipment of the pressure-isolated heat exchange station include pressure-isolated heat exchanger, L2 network circulating water pumps, L2 network makeup pumps, variable speed hydraulic coupling, water softener equipment, deaerators, pumps and other auxiliary equipment. Figure 2.2-2 presents the layout diagram of the pressure-isolated heat exchange station. 2.2.3 Substations There will be 184 substations set in the SHN. Among those, 134 existing substations will be taken use of. 28 boiler rooms will be rebuilt to substations. 22 new substations will be constructed. Existing substations refer to the ones under operation. There is no need to change their civil structure or equipment. After the substations are integrated in the SHN, only monitoring and on-site controlling system needs to be installed. Among others, new pressure-isolated heat exchange rooms with pressure-isolated heat
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN exchange facilities will be added in the three boiler rooms of Lanzhu, Yueming Building and Lithium Salt Plant. Renovated substations refer to substations that are rebuilt from old boiler room. That is, the original structure of boiler room will not be changed while equipment like heat exchange facilities, pumps, water treatment equipment and controlling devices will be installed. New substations will be built according to the scale of heating. The construction of new substations includes civil works and controlling devices.
There exist 134 substations (see Table 2.2-1). There will be 50 new and renovated substations. Table 2.2-1 List of Existing Substations NO. Former owner Number of substations Construction contents Urumqi Xingli Thermal Building heat insulation and exchange 1 24 Power Co., Ltd rooms for secondary heating Boiler room of Yueming Building heat insulation and exchange 2 18 Building rooms for secondary heating Urumqi Lanzhu Building heat insulation and exchange 3 Concentrated Heat 14 rooms for secondary heating Supply Co., Ltd Shiyue Guanghui heat Changing to secondary heating 4 21 exchange station Haoyi Thermal Power Changing to secondary heating 5 12 Co., Ltd Heat supply station in Changing to secondary heating 6 3 Yutian Street Heat supply station of Changing to secondary heating 7 8 Commercial Department Heat supply station in Changing to secondary heating 8 8 Huanghe East Road 9 Mianma Boiler Room 17 Changing to secondary heating Heat supply station of Changing to secondary heating 10 9 post office in Xibei Road Total 134
Table 2.2-2 The Scale and Quantity of Substations No. Name Type Construction contents South part of TianShan district New L1 pipeline network and civil 1 works and equipment of heat exchange station South part of TianShan district New L1 pipeline network and civil 2 works and equipment of heat exchange station Hydro Power Research Renovated L1 pipeline network and 3 Institute equipment of heat exchange station Yan’erwo Cement Co., Ltd Renovated L1 pipeline network and 4 equipment of heat exchange station Urumqi urban road section Renovated L1 pipeline network and civil 5 works and equipment of heat
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
No. Name Type Construction contents exchange station Three-circle Company (East) Renovated L1 pipeline network and 6 equipment of heat exchange station Xinjiang Yuanshui Renovated L1 pipeline network and 7 Management and Operation equipment of heat exchange Co., Ltd station Xinjiang Folk Art College Renovated L1 pipeline network and 8 equipment of heat exchange station Xincheng Real Estate Renovated L1 pipeline network and 9 Company equipment of heat exchange station Three-circle Company (West) Renovated L1 pipeline network and 10 equipment of heat exchange station 11 Xinjiang Tianshan Joint Stock Renovated L1 pipeline network and Co., Ltd equipment of heat exchange station 12 Nanhu Square Property Renovated L1 pipeline network and Managment Co.,Ltd equipment of heat exchange station 13 No.1 boiler room in goods Renovated L1 pipeline network and yard of Urumqi Railway equipment of heat exchange Bureau station 14 No.2 boiler room in goods Renovated L1 pipeline network and yard of Urumqi Railway equipment of heat exchange Bureau station 15 Xinjiang Jinxiyu Industry Renovated L1 pipeline network and Company equipment of heat exchange station 16 No.3 boiler room in goods Renovated L1 pipeline network and yard of Urumqi Railway equipment of heat exchange Bureau station 17 Urumqi Jiutianhe Thermal Renovated L1 pipeline network and Power Company equipment of heat exchange station 18 Xinjiang Restaurant Renovated L2 pipeline network and equipment of heat exchange station 19 YiLiTe Hotel Renovated L2 pipeline network and equipment of heat exchange station 20 Heat supply station of post Renovated L2 pipeline network and office equipment of heat exchange station 21 Urumqi Central Post Office Renovated L2 pipeline network and equipment of heat exchange station 22 Heilongjiang Road New L2 pipeline network and civil works and equipment of heat exchange station 23 Heilongjiang Road New L2 pipeline network and civil works and equipment of heat exchange station
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
No. Name Type Construction contents 24 Jindu Storage and Shopping New L2 pipeline network and civil Co., Ltd works and equipment of heat exchange station 25 Jindu Storage and Shopping New L2 pipeline network and Co., Ltd equipment of heat exchange station 26 Banshan Holiday New L2 pipeline network and equipment of heat exchange station 27 Hydro Power Research Base New L1 pipeline network and civil works and equipment of heat exchange station 28 Yutai Real Estate at New L1 pipeline network and civil Saimachang Road works and equipment of heat exchange station 29 Zhuoxin Real Estate, West of New L1 pipeline network and civil railway at Yasha Mid. Road works and equipment of heat exchange station 30 New Yashan Park in Baoshan New L1 pipeline network and civil Road works and equipment of heat exchange station 31 Meat Plant in Qitai Road New L2 pipeline network and civil works and equipment of heat exchange station 32 Supply and Marketing New L2 pipeline network and civil Cooperative in Heilongjiang works and equipment of heat Road exchange station 33 Department of Water New L2 pipeline network and civil Resources in Yutian Street works and equipment of heat exchange station 34 Yifeng Tongda Kaixuanmen Renovated Renovating existing heat Community exchange station and adding self- controlling devices 35 Court station Renovated Renovating existing heat exchange station and adding self- controlling devices 36 Xinhengji Renovated Renovating existing heat exchange station and adding self- controlling devices 37 Yini Hotel Renovated Renovating existing heat exchange station and adding self- controlling devices 38 East Renovated Renovating existing heat exchange station and adding self- controlling devices 39 Xingle Renovated Renovating existing heat exchange station and adding self- controlling devices 40 Medicine Materials station Renovated Renovating existing heat exchange station and adding self- controlling devices 41 Yuanfang station Renovated Renovating existing heat exchange station and adding self- controlling devices 42 Shuang’an station New Renovating existing heat
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
No. Name Type Construction contents exchange station and adding self- controlling devices 43 Gulisitan Community in New Renovating existing heat Qingfeng Road Zone exchange station and adding self- controlling devices 44 Qingfeng Road Zone New Renovating existing heat exchange station and adding self- controlling devices 45 Qingfeng Road Zone New Renovating existing heat exchange station and adding self- controlling devices 46 Resident area of Department New Renovating existing heat of Forestry in Qingfeng Road exchange station and adding self- controlling devices 47 Qingfeng Road Zone New Renovating existing heat exchange station and adding self- controlling devices 48 Qingfeng Road (Phase I, II New Renovating existing heat and III reconstructed shanty exchange station and adding self- zone) controlling devices 49 Qingfeng Road (Phase IV New Heat exchange station and reconstructed shanty zone) building heat exchange station 50 Local Products & Fruits Co., New Renovating existing heat Ltd in Qingfeng Road exchange station and adding self- controlling devices
2.3 Associated Facilities
One CHP plant and two peak balancing boiler houses are heat sources of this project component. See the details about related heat sources in Chapter 8.
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
3. ENVIRONMENTAL AND SOCIETAL BASELINE
3.1 Natural Environment and Environmental Quality
3.1.1 Overview of Natural Environment 3.1.1.1 Geographical Location Both of the two components of the UDHP are located in Urumqi city. Urumqi is the capital of Xinjiang Uygur Autonomous Region, the center of Eurasia It lies at E 86°37 33 to E88°58 24 and N42°45 32 to 44°08 00 , at the north foot of the midway Tianshan Mountain and the southern edge of Junggar Basin. The city goes in a line covering 14,206km2 with 302.8km2 built up area. In total, seven districts and one county (Tianshan District, Shayibake District, Xinshi District, Toutunhe District, Shuimogou District, Dabacheng District, Midong District and Urumqi County) are governed under Urumqi. The Sayhagh District is related to component 1: the SHN. The Shayibake District lies in downtown of Urumqi with the area of 427 km2. It goes from Yamlike Hill in the west to Hetan Road in the east and is bordered by Tianshan District. The Shayibake District goes southerward to Wulabo and is bordered by Urumqi County and goes northward to Xinyi Road and is connected with Xinshi District. The LanXin Railway and South and North Xinjiang Railways pass the urban area. The heating area of this project covers the southern area to Urumqi West Bridge, western area to Hetan Road, eastern area to Yamalike Hill and southern area to the special railway of Hongyanchi Power Plant in Shayibake District as well as eastern area to Hetan Road, southern area of Water Park, northern area to the special railway of Hongyanchi Power Plan and western area to Yanan Road in Tianshan District. The covered area is about 17 km2. 3.1.1.2 Topographical Features Urumqi City is surrounded by mountains. Most regions are located in mountain- plains with an open alluvial plain in the north. The terrain is higher in the southeast than in the northwest. The height of Urumqi is 680-920m with mean altitude of 800m. The SHN mainly focuses on Shayibake District. Shayibake District lies in the southwest of Urumqi and its northern part is located in the downtown. It is flat in this district. The southern part lies in suburban and hilly area. The south region is higher than the north. The topographical elevation difference is about 100m. The elevation difference of the SHN is significant due to the topographical features. The heat source lies in the south. Its surface elevation is 1,004.1m. The surface elevation of the furthest user is 855m. The elevation difference is 149m. 3.1.1.3 Water Systems Five water systems lie in Urumqi. They are Urumqi River water system, Toutun River water system, Ziwopu water system, Dabacheng water system and Dongshan water system. The SHN goes across the Heping Canal. The Urumqi River is a seasonal river. It starts from the No.1 glacier at the southeast of Shengli Daban of Yilinhabierga Mountain, Tianshan Mountain. This river flows from the south to the north, goes out of the mountain pass and joins nine rivers from Nan Mountain and passes alluvial plain in front of the mountain. It then goes through urban area and the plain in the north and flows into Mengjin Reservoir in Miquan. The total length is 160 km. Its annual runoff is 18.2- 29.06 million m3 with
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN catchment area of 924km2. The section of Urumqi River in urban area is called Heping Canal. 3.1.1.4 Climate and Weather Urumqi lies in the center of Eurasia and far from the sea. It falls within the mid- temperate zone arid continental climate zone. The climate features include: hot summer and cold winter with evident weather changes and large temperature difference between the daytime and nighttime. The precipitation is low in Urumqi and shows a vertical increment while the height increases with high evaporation. There are big differences of precipitation among seasons. Inversion layer can be detected in winter. The prevailing wind direction is northwest, which is significantly affected by Tianshan Mountain. Mountain and valley wind is obvious. Days with calm wind is prevailing in winter. When it is sunny, the wind direction is south in the night, which is mountain wind while north wind blows in the day, which is valley wind. Heavy wind blows when season changes to spring or autumn. The annual frequency of temperature inversion is high in Urumqi due to the terrain. Particularly in heating season, the temperature inversion lasts long and features strong and thick with low mixed layer. In short, the atmospheric diffusion condition is extremely bad combined with dry air, low precipitation and less precipitation days. The air purification ability of Urumqi is weak. Thus, the weather conditions make air pollution serious, particularly during the long weather. The climate parameters of Urumqi are listed in Table 3.1-1.
Table 3.1-1 Main Meteorological Parameters of the Urumqi City Item Data Item Data Proportion of Annual average 6.1 precipitation in 40% temperature spring in one year Extreme maximum Annual mean 40.5 277.6mm temperature precipitation Extreme minimum Daily maximum -41.5 57.7mm temperature precipitation Monthly average Hourly maximum 23.0 13.4mm temperature in summer precipitation Annual prevailing wind Annual mean Northwest 2266.0mm direction evaporation Annual maximum wind Maximum frozen soil 30m/s 1.33m speed depth Maximum snowcover Annual mean wind speed 2.3m/s 39cm thickness
3.1.1.5 Soil and Vegetation The original soil type of Urumqi is grey desert soil, which pertains to alluvial soil plain by the Urumqi River. The soil layer is thick with light salinization. The surface of most areas in the built up region is hardened road and artificial green belt. The soil type of suburban areas is grey desert soil. The vegetation mainly includes low and sparse drought-tolerant plants. The main plants are seriphidium borotalense and nanophyton erinaceum. Salsola, ceratocarpus and other ephemeral plants can also be found. The vegetation cover is about 10%. The heating pipeline network of the SHN will be laid along the special railway and existing civil roads. Green belts that are 2-3m wide lie at both sides of Yuyuan Road, Saimachang Road, Heilongjiang Road and Qitai Road. The pressure-isolated
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN heat exchange station will take use of existing boiler room (Lantian Boiler Room), so no new land acquisition will happen. 3.1.1.6 Animals Most of the works of the SHN will be carried out in the built up area of the city. Minority parts will be constructed in suburban areas. Types of animals in these areas are simple, with few wild animals. Main animals in these areas are companied by human beings. Most of them are resident birds and breeding birds. The dominant species of birds in suburban areas are sparrows, horned larks and larks. Mammals are rare in this region. Only rodents like house mouse (mus musculus) are often seen. There is no rare or endangered species. 3.1.2 Surface Water Quality The pipeline of the SHN is proposed to pass across the Heping Canal. In the investigation of water quality, data and information were collected to evaluate the surface water quality baseline of the Heping Canal. The regular monitoring results of the Heping Canal Power Supply section and the Gaojiahu Bridge section provided by the Central Environmental Monitoring Station of Urumqi in August 2009 were cited in this report. Figure 3.1-1 shows the monitoring points. (1) Monitoring items In light of the environmental situations where the project is located, 22 items for water quality monitoring were selected, including pH, DO, permanganate value, CODcr, BOD5, NH3-N, volatile phenol, oil pollutant, Hg, Pb, As, Cd, Cr(+6), cyanide, fluoride, sulfide, TP, TN, Zn, Se, Anionic surfactant and fecal coliform. (2) Assessment standards Category V in the “Environmental Quality Standard for Surface Water” (GB3838-2002) is based for surface water of the Heping Canal according to its function (agricultural irrigation). The standards are listed in Table 3.1-2.
Table 3.1-2 Standards for Water Quality Assessment Unit mg/L excep unit of pH No. Item Category No. Item Category V V 1 pH 6~9 12 Cd 0.01 2 DO 2 13 Cr(+6) 0.1 3 Permanganate value 15 14 Cyanide 0.2 4 CODcr 40 15 Fluoride 1.5 5 BOD5 10 16 Sulfide 1.0 6 NH3-N 2.0 17 TP 0.4 7 Volatile phenol 0.1 18 TN 2.0 8 Oil pollutant 1.0 19 Zn 2.0 9 Hg 0.001 20 Se 0.02 10 Pb 0.1 21 Anionic surfactant 0.3 11 As 0.1 22 Fecal coliform 40000
(3) Assessment results The monitoring and assessment results of the Heping Canal Power Supply Company and Gaojiahu Bridge section of the Heping Canal are presented in Table 3.1-3.
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
Table 3.1-3 Monitoring and Assessment Results of Two Sections of the Heping Canal Unit mg/L (except the unit of pH)
No. Item Power Supply Company Gaojiahu Bridge Monitoring Monitoring Si,j Si,j result result 1 pH 7.41 0.21 7.61 0.31 2 DO 7.8 0.82 7.5 0.74 3 Permanganate value 2.2 0.15 2.1 0.14 4 CODcr 25 0.63 26 0.65 5 BOD5 1.5 0.15 0.6 0.06 6 NH3-N 0.166 0.083 0.098 0.049 7 Volatile phenol 0.001 0.01 0.001 0.01 8 Oil pollutant 0.005 0.005 0.005 0.005 9 Hg 0.00002 0.02 0.00002 0.02 10 Pb 0.001 0.01 0.001 0.01 11 As 0.001 0.01 0.001 0.01 12 Cd 0.0001 0.01 0.0001 0.01 13 Cr(+6) 0.001 0.01 0.003 0.03 14 Cyanide 0.001 0.005 0.001 0.005 15 Fluoride 0.4 0.27 0.42 0.28 16 Sulfide 0.01 0.01 0.002 0.002 17 TP 0.137 0.34 0.171 0.4275 18 TN 1.3 0.65 1.49 0.745 19 Zn 0.01 0.005 0.01 0.005 20 Se 0.0001 0.005 0.01 0.5 21 Anionic surfactant 0.07 0.23 0.05 0.166667 22 Fecal coliform 490 0.012 130 0.00325
pH − 7 . 0 S = j pH > 7 . 0 pH , j pH − 7 . 0 j Note: su
The monitoring results show that all of the monitoring factors at the Heping Canal Power Supply Company section and the Gaojiahu Bridge section can meet the Category V standards in the “Environmental Quality Standard for Surface Water” (GB3838-2002). 3.1.3 Ambient Air Quality 3.1.3.1 Current Status of Ambient Air Quality in 2009 Figure 3.1-1 presents how the number of days when the ambient air quality meets the standard changes from 2001 to 2009.
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
Figure 3.1-1 Number of Days When the Ambient Air Quality Meets the Standard (2001- 2009) It can be seen in Figure 3.1-1 that the number of days when the ambient air quality meets the standard significantly increased from 2001 to 2003 since scattered small boilers were replaced by large-scale heating in Urumqi. The number did not change much from 2003 to 2009, which indicates that the effect of centralized heating on improving the ambient air quality of Urumqi become weak. It is necessary to replace existing centralized heating with CHP in order to further improve the ambient air quality. 3.1.3.2 Current Status of Ambient Air Quality in 2009 (1) General situation The general situation of ambient air quality of Urumqi in 2009 is shown in Table 3.1-4. The comparison between air pollutant concentrations during the heating season and non-heating season is presented in Table 3.1-5.
Table 3.1-4 The General Situation of Ambient Air Quality of Urumqi in 2009 Grade Number of days Proportion ( ) Excellent & good grade 262 71.8 Light pollution (Grade III) 79 21.7 Medium pollution (Grade IV) 14 3.8 Heavy pollution (Grade V) 10 2.7
Table 3.1-5 The Comparison of Pollutant Concentrations during the Heating Season and Non-heating Season Times Times Times SO mg/m PM mg/m NO mg/m3 2 beyond the 10 beyond the X beyond the 3 3 standard standard standard Grade II in national 0.06 - 0.1 - 0.08 - environmental
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN quality standard Grade III in environmental 0.10 - 0.15 - 0.08 - quality standard Year: 2009 0.093 0.55 0.140 0.4 0.068 0 Non-heating 0.026 0 0.079 0 0.052 0 season of 2009 Heating season of 0.159 1.65 0.202 1.02 0.085 0.06 2009
3 In 2009, the annual average concentration of SO2 is 0.093 mg/m which is 0.55 times higher than Grade II in national air quality standard. The annual average 3 concentration of PM10 is 0.14 mg/m which is 0.4 times higher than Grade II standard. 3 The annual average concentration of NO2 is 0.0685 mg/m which is close to Grade II standard. The coal-fired sources contribute more than 90% of SO2 and 60% of PM10 in Urumqi. It shows a typical coal-smoke pollution.
In the heating season in winter, the emission inventory of SO2 accounts for more than 2/3 of annual total. Given the frequency of calm wind and temperature inversion is higher than 90%, the air pollution shows seasonal changes. The pollution appears light in spring and summer and goes serious in autumn and winter. Extreme pollution sometimes happens in winter. In the heating season in 2009, the concentration of SO2 was as high as 0.180 mg/m3, which is two times higher than Grade II in national air quality standard. The monthly concentration of PM10 was 0.199 mg/m3, which is 0.99 times higher than Grade II in national air quality standard. The heaviest pollution happened in January. (2) Monitoring results of regular monitoring points in 2009 Only the counterpart works like pipeline network and heat exchange stations will be constructed in the SHN, but not the heat source plants and boilers. Thus, there will be no issues of pollutant emission in this project. In this context, data and information were collected in this EIA to analyze the ambient air quality. Regular monitoring data by the Central Environmental Monitoring Station of Urumqi was cited as the information of current status in the project region. This report cites ambient air quality monitoring data of regular monitoring points, including Urumqi Railway Bureau, Monitoring Station and Toll Station from March 21st to 27th, 2009, provided by Urumqi Environmental Monitoring Station, and the monitoring data of six monitoring points, including Government of Shuimogou District, Jianfang Group, Hongqiao Peak balancing Boiler Room, Xuefeng Civil Exploder Company, Xinjiang Center for Disease Control and Prevention (CDC) and Training Center for Civil Servants from December 18th to 24th, 2009, provided by the
Central Monitoring Station of Urumqi. The monitoring items are PM10, SO2 and NO2. Single pollution index is applied to assess the air quality. It was calculated as: Pi = Ci/C0 Where Pi represents single pollution index; Ci represents the monitored concentration of pollutant (mg/m3); and C0 represents the value of assessment standard (GB3095-96).
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
Grade II in the“Ambient Air Quality Standard” (GB3095-96) and in its amended lists promulgated by former State Environmental Protection Administration (SEPA) are based for ambient air quality assessment. The assessment standards are shown in Table 3.1-6.
Table 3.1-6 Ambient Air Quality Standard (GB3095-96) (Cited) Unit: mg/m3 Concentration limit (GB3095-96) Pollutant Sampling time Grade I Grade II Grade III Annual average 0.02 0.06 0.10 SO2 Daily average 0.05 0.15 0.25 Hourly average 0.15 0.50 0.70 Annual average 0.04 0.10 0.15 PM 10 Daily average 0.05 0.15 0.25 Annual average 0.04 0.08 0.08 N02 Daily average 0.08 0.12 0.12 Hourly average 0.12 0.24 0.24
The statistic results of three regular monitoring points and the ones of six monitoring points, viz. Government of Shuimogou District, Jianfang Group, Hongqiao Peak balancing Boiler Room, Xuefeng Civil Exploder Company, Xinjiang CDC and Training Center for Civil Servants are listed in Table 3.1-7.
Table 3.1-7 Monitoring and Assessment results of Air Quality Sampling point and item Sampling Daily Number Proportio days Concentration of points n of days Highest Standard range mg/m3 beyond beyond times over mg/m3 the the the standard standard standard PM 7 0.007 0.117 0.15 0 Monitoring 10 1# SO2 7 0.088 0.221 0.15 4 57% 1.47 station NO2 7 0.074 0.016 0.12 0
PM10 7 0.066 0.206 0.15 3 42.8% 1.37 2# Toll Station SO2 7 0.027 0.105 0.15 0 NO2 7 0.077 0.093 0.12 0 PM 7 0.067 0.207 0.15 2 28.6% 1.38 Railway 10 3# SO2 7 0.065 0.128 0.15 0 Bureau NO2 7 0.058 0.088 0.12 0
Governmen PM10 7 0.130 0.490 0.15 6 85.7 2.27 t of 4# SO2 7 0.098 0.125 0.15 0 Shuimogou NO2 7 0.088 0.108 0.12 0 District PM 7 0.151 1.153 0.15 7 100 6.69 Jinfang 10 5# SO2 7 0.099 0.145 0.15 0 Group NO2 7 0.071 0.108 0.12 0
6# Hongqiao PM10 7 0.178 0.648 0.15 7 100 3.32 Peak SO2 7 0.113 0.174 0.15 2 29.6 0.16 balancing
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
balancing NO2 7 0.071 0.112 0.12 Boiler 0 Room
Xuefeng PM10 7 0.116 0.779 0.15 6 85.7 4.19 Civil 7# SO2 7 0.105 0.151 0.15 1 14.2 0.01 Exploder NO2 7 0.071 0.100 0.12 Company 0
PM10 7 0.366 0.765 0.15 7 100 4.1 Xinjiang 8# SO2 7 0.117 0.146 0.15 0 CDC NO2 7 0.067 0.073 0.12 0
Training PM10 7 0.202 0.887 0.15 7 100 4.91 Center for 9# SO2 7 0.129 0.175 0.15 6 85.7 0.17 Civil NO2 7 0.070 0.095 0.12 Servants 0
The assessment results in Table 3.1-7 show that the concentrations at nine monitoring points all exceeded the standards. Among others, the concentration of
PM10 exceeded the most at every point. The proportion of days when the monitored concentrations was beyond the standard ranges from 28.6% to 100%. The highest concentration of PM10 was 6.69 times higher than the standard. SO2 was the second. The proportion of days when the monitored concentrations was beyond the standard ranges from 14.2% to 85.7%. The highest concentration of SO2 was 0.17 times higher than the standard. The concentrations of NO2 were not beyond the standard. The ambient air quality in the assessment area could not meet the Grade II in the “Ambient
Air Quality Standard” during the monitoring period. The primary pollutant is PM10 and the secondary one is SO2, which indicates a typical coal-smoke pollution. The main reason of the excess is the pollutant emissions from coal in winter. In addition, the topographical and meteorological conditions also cause the bad air quality in the heating season. 3.1.3.3 Conclusions As discussed above, the coal-smoke pollution happens in winter in Urumqi. The monitoring results in the whole city provided by the Central Monitoring Station of Urumqi indicate obvious regional differences of air pollution among areas. The monitored concentrations of pollutants are much higher at the central area of the city (south region, south of Hong Hill) that in the north region of Hong Hill. In terms of period distribution, big differences between the heating season and non-heating season can be detected, particularly for SO2 and PM10. The concentrations of the two items can meet the Grade II standard in non-heating season while they are much higher than the standards in heating season. 3.1.4 Acoustic Environmental Quality Several measures were implemented in Urumqi in 2009 to supervise traffic noise, noise of city life, construction noise and industrial noise. Industrial noise was required controlled before deadline. Sound barriers were set along key road sections so that the disturbance of traffic noise on residents has been relieved. The control and management of noise from restaurants and noise during the university entrance examination were improved. In 2009, the average equivalent sound level of traffic
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN noise was 70.1 dB(A) that is 1.1 dB(A) lower than the last year. The regional average equivalent sound level was 54.9 dB(A) that pertains to “Less Good” Grade. The main noise sources in the region that the SHN relates to are traffic noise. In order to assess the acoustic environmental baseline in the project region, the Xinjiang Monitoring Station was commissioned in March 2010 to carry out noise monitoring at the boiler rooms related to the SHN, proposed pressure-isolated heat exchange stations and residential areas along the pipeline network. According to the “Noise Zoning of Urumqi On the Basis of ‘Standard of Environmental Noise of Urban Area’” promulgated by the UMEPB, Category 4a in the “Environmental quality standards for noise” (GB3096-2008) is based for sensitive points like residential areas, schools and hospitals along trunk roads. Most of the heating pipeline network of the SHN will be laid along trunk roads, so Category 4a in the “Environmental quality standards for noise” (GB3096-2008) is based for these areas. Category 2 standards are based for rural areas where the pipelines pass. The pressure-isolated heat exchange station of the SHN will be renovated from Lantian Boiler Room. Category 2 in the “Emission Standard for Industrial Enterprises Noise at Boundary” (GB12348-2008) is based for the station boundary. The monitoring methods were applied as required in the “Environmental quality standards for noise” (GB3096-2008). The monitoring instrument was noise analyzer AWA6218A-1 and calibration instrument was sound level calibrator ND-9. In light of the project features and potential impacts of the SHN, ten sensitive points along the project, Lantian Boiler Room (that will be renovated to pressure- isolated heat exchange station) and Water Park Substation were selected as monitoring pointes. The monitoring results are shown in Table 3.1-8 and Table 3.1-9.
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
Table 3.1-8 Monitoring Results of Acoustic Environmental Quality of the SHN (1) Unit: dB (A) Standard March 11th March 12th Over the No. Monitoring point Direction (Leq) Note standard Daytime Nighttime Daytime Nighttime Daytime Nighttime Pressure-isolated East 53.8 43.1 51.6 45.7 - heat exchange South 52.5 44.1 53 46.4 - 1 60 50 station (renovated West 52.2 45.8 54.1 42.5 - Lantian Boiler Room) North 59 44.6 55.5 45 - By road 2 Water Park Substation 60 50 53 51.2 53.4 50.5 -
Table 3.1-9 Monitoring Results of Acoustic Environmental Quality of the SHN (2) Unit: dB (A)
Standard Distance to March 11th March 12th (Leq) Over the No. Monitoring point Direction the road standard redline (m) Daytime Nighttime Daytime Nighttime Daytime Nighttime 1 Qingdao Jiayuan South 20 70 55 49 43 49.7 42.5 - Community of Water 2 East 20 63.5 47.2 62 48.2 - Park Xindayintong 3 East 15 68.5 54.1 66.4 52.4 - Community 4 Taiqi Community South 15 53.8 50.8 61 45.1 - 5 No.42 Primary School East 20 65.5 48.6 66.3 49.8 - Community of Public 6 North 15 60.2 42.7 60.1 43.6 - Security Agency Community of Post 7 South 12 60.1 47.9 61.7 45.9 - Office 8 Huixiyuan East 10 54.5 36.7 54.1 37.8 -
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
Xuelian Primary 9 East 30 60.8 44.5 61.4 43.8 - School 10 Shanyuan Community East 15 59.6 42.2 59.3 42.6 -
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
As it is shown in Table 3.1-8 and Table 3.1-9, the current sound levels at the noise sensitive points met the “Environmental quality standards for noise” (GB3096- 2008). The sound level of pressure-isolated heat exchange station and the substations met the “Emission Standard for Industrial Enterprises Noise at Boundary” (GB12348- 2008).
3.2 Societal and Economic Status
Urumqi is the capital of Xinjiang Uygur Autonomous Region, the center of the region’s politics, economy and culture, as well as an important international transport hub in western China and portal of opening. There are seven districts and one county (Tianshan District, Shayibake District, Xinshi District, Toutunhe District, Shuimogou District, Nanshan Mining District, Midong District and Urumqi County) governed under Urumqi, including 21 countries and towns as well as 48 sub-district offices. The total area of built up region is 166.8 km2. 49 brother ethnic groups like Uygur, Han, Hui, Kazak and Mongolian live together in the city. The total population is 2.082 million (data of the fifth national census), 24.6% of which are ethnic minorities. About 83.5% of people live in urban areas.
3.2.1 Regional Economy 3.2.1.1 Urumqi As the capital and central city of the autonomous region, Urumqi leads the economic development in the autonomous region with large total economic value and strong development momentum. The economic indicators, such as GDP, industrial added value, retail sales and revenue all comes the first among other cities in Xinjiang. The Urumqi’s economic development becomes more prominent in the autonomous region. The GDP of Urumqi was 109.5 billion in 2009, which accounts for more than 25% of the total amount of Xinjiang. Calculated as constant price, the increase rate of GDP reached 15% in 2009. The GDP in 2009 was 9.5% more than GDP of the last year. The industrial structure has been optimized. The proportions of the three industries were 1.5:41.3:57.2. The Urumqi’s economic contributions to the economy of Xinjiang are shown in Table 3.2-1. Main economic indicators of Urumqi are listed in Table 3.2-2.
Table 3.2-1 Contribution of Urumqi’s Economy to the Economy of Xinjiang in 2009 Land area Annual GDP Industrial added Retail sales Population Indicator (km2) (RMB billion value (RMB (RMB billion (person) Yuan) billion Yuan) Yuan) Xinjiang 1,660,400 21,586,300 427.357 157.988 117.753 Urumqi 14,200 2,411,900 109.5 38.6 47.3 Proportion 0.86% 11.17% 25.62% 24.43% 40.17%
Table 3.2-2 Economic Indicators of Urumqi Proportion Proportion Proportion GDP per of GDP of Primary of Tertiary capita Population Secondary Year (RMB billion industry in industry in RMB person industry in Yuan) GDP GDP Yuan/perso GDP (%) (%) n (%) 2000 1,643,800 28.985 2.4 35.9 61.7 14622 2001 1,690,300 32.794 2.3 35.5 62.3 15732
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
2002 1,757,200 36.706 2.4 33.3 64.3 16990 2003 1,815,300 42.6 2.4 34.8 62.8 19085 2004 1,859,600 50.661 2.4 38.1 59.6 21990 2005 1,941,500 59.354 2.1 37.9 59.9 24771 2006 2,018,400 69.243 2.1 38.5 59.5 27707 2007 2,313,000 82.028 2.0 38.6 59.4 31140 2008 2,360,500 101.461 1.5 41.6 56.9 37133 2009 2,411,900 108.775 1.5 42.9 55.5 45099.3 r I a n t c ( e 2001-2005 3.4% 11.7% 10.2% 10.7% 12.6% 7.5% r %
e a ) 2006-2009 6.7% 14.3% 8.2% 14.2% 14.1% 14.1% s
e
2001-2009 5.4% 14.5% 10.7% 14.1% 15.5% 11.7%
3.2.1.2 Shayibake District Shayibake District is parts of the downtown of Urumqi covering 427 km2. The population is 528,000. There are 38 ethnic groups including Han, Uygur, Hui, Kazak, Manchu and Mongolian, etc. The ethnic minorities account for 2% of population. The population density is 22,609 persons per km2. In 2009, the GDP of Shayibake District was RMB 15.797 billion Yuan with increase rate of 7%. The budgetary revenue of local government was RMB 780 million Yuan with increase of 15.06%. Total retail sales of social consumer goods were RMB 12.49 billion Yuan with increase rate of 12.39%. The fixed assert investment was RMB 4.5 billion Yuan with increase rate of 13.6%. Net income per capita of farmers and herdsmen was RMB 6,069 Yuan with increase of 8%. 3.2.1.3 Tianshan District Tianshan District lies in the southeast of Urumqi covering 200 km2. The area of built up region is 47.78 km2. The population is 599,700. 44 ethnic groups are living in this distict including Han, Uygur, Hui and Kazark etc. In total, 14 sub-district offices, 129 communities, one village, one ranch and 1,060 military units are governed under Tianshan District. In 2009, the GDP of Tiansh District was RMB 20.21 billion Yuan with increase rate of 4.5%. The add values of the primary, secondary and tertiary industries were RMB - 0.04, 2.136 and 17.622 billion Yuan respectively. The respective annual increase rates are -1.2%, 87.4% and -13.6%,. The gross industrial output value in this district was RMB 11.926 billion Yuan with increase rate of 13.0%. The fixed assert investment was RMB 5.214 billion Yuan with increase rate of 8.2%. The budgetary revenue of local government was RMB 1.035 billion Yuan with increase of 1.07%. Total retail sales of social consumer goods were RMB 12.517 billion Yuan with increase rate of 9.19%.
3.2.2 Energy Structure Coal is the main energy source in Urumqi, accounting for about 90% of total energy use. The consumption of coal in the heating season is more than 4 million ton, accounting for more than 44% of total energy use in winter. The coal consumption per capita is about 3.96 ton, which is ranked first around the cities in China and is 4 times of the national average level. The percentage of coal to final energy consumption decreased 10%, from 55.5% in 1998 to 10.1% in 2004, while the percentage of natural gas increased from 6.6% in 1998 to 10.1% in 2004. Although the proportion of coal
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN went down, the total amount of coal use has risen with GDP year by year. The energy consumption and energy mix of Urumqi are presented in Table 3.2-3. Table 3.2-3 Energy Consumption and Energy Structure of Urumqi Indicator Unit Consumption Proportion (%) Coal consumption Million ton 14.72 73.2 Oil consumption Million ton 2.25 22.4 Natural gas consumption Billion m3 0.396 3.7 Renewable energy Ton standard 96,200 0.7 consumption coal The proportion of natural gas in primary energy of Urumqi use was only 3.7% in 2009. According to the “12th Fiver-year Plan for Energy Consumption Structure of Urumqi” and “Urban Heating Structure Adjustment Plan”, the natural gas heating will account for 33.33% of total heating.
3.3 Current Air Pollution Control and Management
3.3.1 Air Pollution and Its Causes in Urumqi In Urumqi, the area of thermal- power cogeneration and clean energy heating currently accounts only for 20% of the total area. The rest are supplied through centralized heating or scattered coal-fired heating. Table 3.3-1 shows the current status of heating in urban areas of Urumqi.
Table 3.3-1 Current Status of Heating in Urban Areas of Urumqi in 2008 (million m2) Centralized Scattered coal- Small civil CHP coal-fired Clean energy Total fired boiler coal stove heating 13. 55.94 8.46 13.83 6.50 97.73
As statistics shows, there are 178 coal-fired boilers in 52 centralized heating boiler rooms, 790 coal-fired boilers in 369 scattered heating boiler rooms and 9297 scattered small civil coal stoves. There are only 23% of centralized coal-fired boiler rooms, from which the dust emission can meet the air pollutant emission standard. The proportion for SO2 emission is 12%. No desulfurization and dust removal facilities are installed on scattered small boilers. The low efficiency, high energy consumption of boilers and low efficiency of desulfurization facilities causes that the days when air quality can meet the standard accounts for less than 50%. Accordingly, annual average air quality can not meet the standard. Thus, the vital tasks in Urumqi are to manage scattered coal-fired boilers and adjust energy structure. In this context, it becomes an emergent task to develop centralized heating through CHP, so that the efficiency of energy use could be improved; energy saving and pollutant emission reducing could be promoted; and the environmental quality could be improved. In light of current situations of energy supply and heating in Urumqi, the government proposes to improve centralized heating through CHP, to develop clean energy heating like gas heating and to promote energy saving strategy of heating. The proportion of CHP and clean energy use is proposed to reach 90% until 2015.
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The main reasons of heavy air pollution in Urumqi except the natural geographic conditions are discussed as below.
(1) The primary man-made causes of air pollution in Urumqi are improper energy structure and high energy consumption The primary causes of air pollution in winter in Urumqi are the coal-based energy structure and low energy efficiency and waste. Currently, coal accounts for more than 70% of total primary energy consumption in Urumqi. The coal consumption per capita is ranked first among cities in China and is 4 times of national average level. In 2008, total coal consumption was 14.72 million ton, 2/3 of which was used in winter. The energy sources of main pollution sources including power industry, construction materials industry, metallurgical industry and heating industry are coal-based. The high pollutant emissions are due to high energy consumption. The pollutant emission inventory is over the environmental capacity. The coal consumption by sector is listed in Table 3.3-2. The air pollutant emissions are shown by sector in Table 3.3-3.
Table 3.3-2 Coal Consumption by Sector in Urumqi (2007) Average daily coal Proportion consumption in Energy Unit Consumption Note (%) heating season (ton/day) Calculated as power industry ton/year 5,793,700 39 15,870 365 days construction ton/year Calculated as material, chemical 5,502,800 38 16,680 330 days and metallurgical Coal used for ton/year Calculated as 2,795,200 19 16,940 heating 165 days ton/year Calculated as Civil coal use 151,800 1 420 365 days Coal used in other ton/year Calculated as 476,500 3 1,440 sectors 330 days
Table 3.3-3 Air Pollutant Emissions by Sector in Urumqi (2007)
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SO SO NO NO Dust Dust No. Category 2 2 x x (ton) (%) (ton) (%) (ton) (%) 1 Power sector 42,000 28.55 6,000 7.03 66,000 (15,000 ton 2 Industrial sources generated in 44.87 77,500 54.65 26,000 30.48 producing process) Centralized 3 16,000 10.88 13,000 15.24 heating sector 4 Life source 11,000 7.48 17,000 19.93 5 Automobile 27,300 19.25 Total 135,000 91.8 104,800 73.9 62,000 72.6
Table 3.2-2 and Table 3.2-3 explain the improper energy structure of Urumqi. The natural gas and renewable energy account for less than 5% of total primary energy consumption. The big users of coal are power sector, construction material industry, chemical industry, metallurgical industry and heating sector. The coal consumption in these sectors accounts for 96% of the total use in the city. The pollution emissions from these sectors also accounts for most of the emission inventory of the city. SO2 emission was 1.35 million ton, account for 91.8% of the inventory of Urumqi. NOx emission was account for 73.9% and dust emission accounts for 72.6%. SO2 emission from life sources accounts for 8.1% and dust from life sources accounts for 27.4%. (2) The air pollution is exacerbated due to the dominant coal-fired heating There are 178 large coal-fired boilers in 47 boiler rooms distributed in the center of Urumqi city. There is one centralized heat supply station in per area of 2.7 km2 in average. In addition, thousands of civil coal-fired boilers or stoves exist in peri-urban areas. The scattered distribution and fragmented heating mode make the air pollution in heating season in Urumqi is exacerbated. According to statistics, unadvanced desulfurization facilities are used in most centralized heating boilers. Even no desulfurization facility has been installed in some boilers. Thus, the pollutant emissions can not meet the standards. The concentration of dust emission of only 23% of the boilers can meet the local standard (100mg/m3 for Period I) in the “Emission Standard of Air Pollutants for Coal-fired Boiler”
(DB65/2154-2010). The concentration of SO2 emission of only 12% of the boilers can meet the local standard (500mg/m3 for Period I). Since the thermal efficiency and chimney of scattered boilers are low without desulfurization facilities, it is more obvious that the dust and SO2 emissions are beyond the standards. All of these aggravate the air pollution in winter in Urumqi. At present, the area of CHP accounts for 13.68% of total heating area in Urumqi. The area of clean energy heating like natural gas heating accounts for 6.83%. The area of centralized heating accounts for 72%. The rest are scattered heating with small boilers. The heating structure is improper, because on the one hand, the CHP has developed slowly and can not satisfy the rapid increase of new heating areas, which have to depend on expansion of centralized heating stations and scattered boilers. On
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN the other hand, it is because that part of CHP and scattered boilers within the centralized heating area have not been integrated in the centralized heating network for some reasons. The Southern District Heating Network Project and Weihuliang Power Plant CHP Project were carried out in 2007. About 150 scattered boilers and 2200 small coal-fired boilers have been replaced by CHP. The annual coal consumption has been reduced 90,000 ton. The annual reductions of SO2, dust and cinder are 1420 ton, 4080 ton and 18,000 ton respectively. (3) Low direct emission from non-point life sources like scattered boilers and small coal-fired boilers cause severe pollution. Because there are not proper environmental protection devices in scattered boilers and small coal-fired boilers, the desulfurization efficiency is low and emissions are much over the standards. Their impacts on air pollution in winter in Urumqi are significant and should not be ignored. The results of “The Research of Causes of Air Pollution in Urumqi” conduced by Tsinghua University indicates that in terms of contribution to pollutant concentrations, the non-point life sources and heating boilers less than 20 ton have major effects on concentrations of main pollutants. Low direct emissions from non-point life sources like scattered boilers and small coal-fired boilers contribute about 40% of the concentrations of SO2, PM10 and NOx in heating season. Thus, it is crucial to manage the low non-point sources. In the coming period, an important task of air quality improvement in Urumqi is to integrate scattered small coal-fired boilers into centralized heating network or transform them to gas boilers. (4) Industrial production lies in low level of the industrial chain. The economic growth is extensive. The situation that air pollutant emissions from industrial sources are beyond the standards is still serious. Emission inventory caused by coal firing is significantly high. In 2008, the emission inventories of SO2 and dust were 140,000 ton and 63,000 ton respectively. The emissions from industrial sources dominated the inventory, which accounts for 91.9% of SO2 emission and 71% of dust emission. The emission by sector focused on power and thermal production and supply sector, petroleum processing and coking industry and ferrous metal smelting and rolling processing industry. The accumulated equivalent emission load of these sectors reached 85% in 2008. The key pollution sources in Urumqi contribute much to air pollution. The air pollutant emissions in Urumqi concentrate on nine factories, the equivalent emission load of which accounts for 80-90% of the total equivalent emission load of all key industrial pollution sources. 40% of SO2 emission inventory comes from the power sector. The industries that promote rapid economic growth in Urumqi are featured as high resource input and consumption and high pollutant emission, including petrochemical, steel, power, coal and building materials industries, etc. Currently, unadvanced technologies are applied in the production of these industries. The production lies in low level of the industrial chain with low added-value. That is why the resource consumption and pollutant emissions per production are much higher than international and domestic advanced levels. In 2007, the energy consumption per
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
GDP was 2.54 ton standard coal per 10,000 Yuan RMB in Urumqi, which is 2.2 times of the national average level. The SO2 and dust emission inventories per industrial added-value were 0.054 ton per 10,000 Yuan RMB and 0.025 ton per 10,000 Yuan RMB respectively, which are 2 times of the national average level. High energy consumption leads to high emission. High emission leads to serious pollution. According to the general survey of pollution sources, more than 80% of dust and SO2 emissions come from industrial factories, which focus on power production plant, large-scale industrial factories and centralized heating factories. SO2 emissions from the top 20 factories (see Table 3.3-3) accounts for 74% of the total emission inventory. Among others, SO2 emissions from Huandian Xinjiang Hongyanchi Power Corporation, Guodian Xinjiang Hongyanchi Power Corporation, Huadian Xinjiang Weihuliang Power Corporation account for 40%. To date, only Huadian Xinjiang Weihuliang Power Corporation and Hongyanchi Power Corporation have installed desulfurization facilities. Guodian Honyanchi Power Co. Ltd. initiated large power generators and reduced small generators. However, there are still 4 small generators running. SO2 emissions from China National Petroleum Corporation Urumqi Branch, Baosteel Group Bayi Iron & Steel Corporation, Shenhua Coal Gangue Power Plant, Tianshan Cement Corporation and XinJiang XinHua Chemical Fertilizers Ltd. accounts for 23%. The contribution of dust emissions from these factories is also high. The pollution prevention and control of many centralized heating corporations like Guanghui Thermal Corporation is weak. 40% of emissions from these factories exceed the standards. SO2 emissions accounts for about 20% of total emission inventory in Urumqi. (5) The contribution of vehicle emissions to air pollution increases year by year. Given the rapid urban development and increase of vehicle population, pollutant like NOx emissions keep increasing. The pollution condition for “photochemical smog” exists in some places. The coal-smoke pollution has not yet been managed. If it is added with vehicle emissions, compound pollution may happen. This would have major impacts on ambient air quality in Urumqi. To date, the vehicle population in Urumqi is 280,000 vehicles, which refers to registered ones. About 850,000 vehicles increased in three years from 2006 to 2008, while 70,000 new vehicles were registered in 2009. There are currently more than 100 vehicles registered every day. The annual increase rate of vehicle population is higher than 15%. Table 3.3-4 shows the changes of vehicles in Urumqi from 1997 to 2009.
Table 3.3-4 Changes of Vehicles from 1997 2009 Year Vehicle population (vehicle) Annual increase rate (%) 1997 43865 2000 66588 51.80 2004 126145 89.44 2005 138488 9.78 2006 152411 10.05 2007 177148 16.23 2008 210000 18.54 2009 280000 33.33
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The vehicle emissions in built up areas contribute about 40.1% of NOx and 94.1% of CO in total air pollutants. In recent years, the concentration of NO2 in ambient air keeps rising and exceeds the standard in heating seasons. The annual average concentration of NO2 is close to national standard, which should be paid attention to. 3.3.2 Current Air Pollution Control and Management According to the First General National Survey of Pollution Sources, the emission inventories of SO2 and dust (including industrial dust) were 140,000 ton and 63,000 ton respectively in 2008. As calculated, the environmental capacity of SO2 and dust of Urumqi is about 67,400 ton per year and 63,000 ton per year respectively. The emission inventories are far over the environmental capacity and have aggravated the air pollution in Urumqi. In order to control air pollution in winter, a “Leading Committee of Urumqi for Air Pollution Control in Winter” was established. The “Leading Committee” is responsible for annual examination of air pollution prevention and control and task decomposition at each period. They are also responsible for supervising and examining if the air pollution control objectives are reached in each period. In order to control air pollution caused by coal firing in winter, the implementation of the “Emission Standard of Air Pollutants for Coal-fired Boiler” (DB65/2154-2010) has started since 2010. The emission concentrations of dust and
SO2 required in this standard is lower than the requirements in the “Emission Standard of Air Pollutants for Boilers” (GB13271-2001). Since the “Blue Sky Project” was initiated in 1998, the air quality of Urumqi has significantly improved from traditional heating through scattered coal-fired boilers to centralized heating through large coal-fired boilers, and then to current heating through CHP. There were 262 days when the air quality meets Grade II standard and better than Grade II in 2009, while there were only 149 days in 1998. However, the air pollution in winter is still affected by the energy structure and topographic features. The days when the air quality can meet the standards account for less than 50% in heating seasons in winter. This has become an obstacle to socio-economic development of Urumqi. The energy consumption structure and mode have changed a lot through a series of key projects and environmental management measures. The use of clean energy needs to be further promoted in the future. The scattered coal-fired boilers in urban areas shall be integrated into the centralized heating network. Large-scale CHP shall be implemented. Air pollution control of key pollution sources shall be strengthened to improve the environmental achievements. Furthermore, industrial distribution and structure needs to be further optimized to control air pollutant emissions inventory. It is proposed to control SO2 emission inventory less than 67,000 ton per year and dust emission inventory less than 40,000 ton per year, in order to achieve air quality objectives.
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3.4 Respiratory Disease Status
As reported by the World Health Organization in 1998, Urumqi was ranked the fourth in Global Top 10 polluted cities. In 2004, Urumqi was the fourth city with most serious air pollution among 47 key cities in China. There were 25 days when Grade V air pollution happened in Urumqi in the winter of 2006. It was 10 days in 2009. Seasonal air pollution is obvious in Urumqi, which focuses on heating season in winter. The severe air pollution has affected residents’ health and living level. Air pollution does much harm to human health. The common harm is respiratory diseases and physiological dysfunction. In addition, people often get sick because mucosal tissues like eyes and noses are irritated. The harm of air pollution to human health is listed in Table 3.4-1.
Table 3.4-1 Harm of Air pollution to Human Health Pollutant Harm to human health Causing respiratory diseases, exacerbating cardiovascular disease, and reducing SO 2 lung resistance Reducing lung function and causing airway inflammation, chest tightness, cough O 3 and nausea NOX Irritating the lung and reducing its resistance to infection Particles Affecting breathing and causing lung tissue damage, cancer, and premature CO Weakening the ability of blood to carry oxygen
According to epidemiological research, air pollution closely relates to the number of outpatients of respiratory disease and cardiovascular disease as well as the lung cancer mortality. The research indicates the direct relation among the incidence of respiratory disease, air pollution and meteorological conditions. The incidence of respiratory disease increases when serious air pollution happens. Referencing the research conducted by Wang Yan etc. (The Effect of Air Pollution in Urumqi on the Respiratory System Diseases, Journal Of Shenyang Agricultural University(Social Sciences Edition), 2007-10, 9(5), 783-785), the respiratory outpatients of some hospital in Urumqi in years are cited in Table 3.4-2.
Table 3.4-2 Respiratory Outpatients of Some Hospital in Urumqi (2002-2005) Year Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec. Total 2002 1538 932 899 1272 1219 1290 1442 1571 1747 1494 1535 1809 16748 2003 2289 1446 1957 2533 1691 1357 1353 1379 1531 1577 2553 2111 21777 2004 2056 1265 1751 1709 1638 1620 1500 1861 1571 1694 2255 2370 21290 2005 2434 1860 1587 2191 2257 1912 1730 2299 2184 1911 2537 2426 25328 Monthly 2079 1476 1549 1926 1701 1545 1506 1778 1758 1669 2220 2179 mean
As analyzed in the above table, the number of respiratory outpatients shows the following characteristics: (1) Respiratory disease happens every month but varies significantly among seasons. The number of respiratory outpatients reached the peak in November, December and January. Except for factors like weather change, pressure increase and sudden drop of temperature, air pollution in heating season in winter is the main cause of the increased incidences of respiratory disease in Urumqi.
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(2) Due to urban expansion and increase of urban population, the energy consumption is more intense. Consequently, the intensity of air pollution emission increases, which leads to the significant increase of respiratory patients. (3) Respiratory outpatients decrease in spring and summer with good air quality.
3.5 Key Environmentally Sensitive and Social Protection Areas
3.5.1 Current Status of Cultural Heritages In the field investigation, the EIA team identified two mosques in the project area, including West Bridge Mosque and Hetian II Street Shayibake Mosque. The two mosques are general religious sites but not cultural heritage. Local custom needs to be respected when the construction is carried out in this section. The workers need to understand ethnic customs and taboos in order to avoid disturbances on ethnic minorities’ life and culture. 3.5.1.1 West Bridge Mosque The West Bridge Mosque lies close to Youhao South Road. There exists a pavement in the north which is connected to Xibei Road and Youhao South Road. It is about 15m wide and 60m long. The traffic is busy in this area. There are also many pedestrians around. More than 1,000 people visit the mosque on Friday Prayers. There are usually 100-200 visitors. 3.5.1.2 Shayibake Mosque Shayibake Mosque is a Uygur mosque located near Hetian Street. It was built in 1947. There are usually 60-70 visitors. The number of visitors that come to the mosque on Friday is 100-200. 3.5.2 Ecologically Sensitive Areas The ecologically sensitive areas identified in the SHN include green belts along both sides of Yuyuan Road, Saimachang Road, Heilongjiang Road and Qitai Road. The width of green belt is 2-3 m. The pipeline trench is 5-10 m away from the green belt. 3.5.2 Noise Sensitive Points
37 noise sensitive points along the SHN were identified after the field investigation, including 32 residential areas, four schools and one hospital. The sensitive points are listed in Table 3.5-1.
Table 3.5-1 Noise sensitive Points Distance to Road the No. Name Situation Type section pipeline (m)
New community, Yanerwo 20m in the no resident yet. 1 Qiangdao Huayuan Residential area Road south About 300 households
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Distance to Road the No. Name Situation Type section pipeline (m)
Community of Water Yanerwo 20m in the About 100 Residential area 2 Park Road east households
Guangyiyuan Yashan 24m in the Residential area 3 230 households Community Mid. Road east
Xindayintong Cangfangg 15m in the About 1,000 4 Residential area Community ou Road north households
Community of Bayi Cangfangg 15m in the About 350 Residential area 5 Powder Plant ou Road west households
Community of Third Zhujiang 30m in the About 1,000 Residential area 6 Construction Road north households
About 230 Changjiang 30m in the 7 Dongfang Garden households Residential area Road west 80% are tenants
Changjiang 25m in the About 2,000 Residential area 8 Huayuan Community Road east households
Changjiang 20m in the Education area 9 No.4 Middle School Road east
Changjiang 20m in the 10 No.22 Primary School Education area Road west
Yining 15m in the About 1,000 11 Taiqi Community Residential area Road south households
Xinjiang Hospital of Huanghe 30m in the 12 Traditional Chinese Hospital Road east Medicine
Huanghe 15m in the About 35 Residential area 13 Community of ICBC Road east households
Community of Heat Yutian 15m in the About 24 Residential area 14 Supply Station Road north households
Community of Hydro Yutian 15m in the About 75 15 Power Research Residential area Road south households Institute
Community of Post 12m in the About 314 Residential area 16 Wuyi Road Office south households
Huanghe 20m in the About 4 Residential area 17 Pijia Dayuan Road west households
Community of Wuyi Huanghe 25m in the About 50 Residential area 18 Cinema Road west households
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Distance to Road the No. Name Situation Type section pipeline (m)
Community of Public 15m in the About 36 19 Wuyi Road Residential area Security Agency north households
Residential buildings Residential area 18m in the About 24 20 of Shayibake District Wuyi Road north households Government
Dormitory buildings 15m in the Some are Residential area 21 Qitai Road of China Unicom north dormitories
Community of Post 16m in the About 120 Residential area 22 Qitai Road Office north households
Community of 15m in the Three unit, about 23 Qitai Road Residential area Highway Bureau south 120 households
Community of 15m in the About 53 Residential area 24 Qitai Road Rubber Factory south households
Community of Oil Hetian II 12m in the About 26 Residential area 25 and Coal Sector Street east households
Hulide Commercial Hetian II 12m in the About 58 Residential area 26 Community Street east households
Hetian II 10m in the About 1,000 27 Huixi Yuan Residential area Street east households
Community of Levy Hetian II 12m in the About 95 Residential area 28 & Check Bureau Street east households
Community of Altay Hetian II 12m in the About 46 Residential area 29 Office Street east households
Two buildings, Community of Baoshan 25m in the 30 about 96 Residential area Education Bureau Road east households
Baoshan 30m in the About 2,000 Residential area 31 Hefengyaju Road east households
1,700 students and Xuelian Primary Baoshan 30m in the 32 130 teachers and Education area School Road east other staff
Hongshiyue Lanxiu 20m in the About 2,000 33 Residential area Community Road west households
15m in the 34 Shanyuan Community Xibei Road 153 households Residential area west
15m in the 35 Vocational College Xibei Road Education area northeast
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3.5.3 Water Environmentally Sensitive Points
The water body that the SHN relates to is the Heping Canal. The water environmentally sensitive points are listed in Table 3.5-2.
Table 3.5-2 Water Environmentally Sensitive Points Water Times of Construction Note body passing Overhead laying of Heping 1 Trunk pipeline of L1 network of the SHN DN1200 Canal Overhead laying of Heping Branch pipeline of Lanzhu Boiler Room, 1 DN800 Canal L2 network of the SHN SHN Overhead laying of Heping Branch pipeline of Pose Office Heat 1 DN600 Canal Supply Station, L2 network of the SHN Overhead laying of Heping 1 L2 network of the SHN DN500 Canal
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4. ENVIRONMENTAL IMPACT ASSESSMENT
4.1 Impact Assessment during the Construction Phase
4.1.1 Ecological Impact Assessment during the Construction Phase (1) Impact of new land acquisition on ecological environment The pipeline of the SHN will be laid along existing special railway of power plant and civil roads. Existing boiler room (Lantian Boiler Room) will be taken use as pressure-isolated station. Thus, this project will not lead to new land acquisition. Temporary land acquisition is needed for pipeline laying. The width of the works will be about 10m. Temporary land acquisition of construction is about 3,332 m2. The impacts on vegetation induced by the temporary land acquisition happen in the year of construction. The vegetation can be recovered after the construction. (2) Impacts on vegetation and woodland The works of the SHN pertains to linear construction. Its impacts on vegetation are mainly due to pipeline works. The main impacts include tree transplanting and lawn removal. The natural vegetation is sparse in the project region. Artificial vegetation lies in green belts at both sides of roads and woodland affiliated to organizations along the project. Common trees include white ash tree, ulmaceae, ulmus densa, cloves, torch tree and c.ovata, etc. Some of the trees along the project will be transplanted. During the process, the vegetation cover ratio will decrease in a period. However, the green belt will be recovered after the construction is completed. Construction dust will affect the plant growth, but the works is limited in this project. Thus, the impact of dust on vegetation during the earthwork excavation is minor and will become weak after the construction is completed. Watering during the construction phase can minimize the impacts of dust in order to protect the plants. In addition, solid waste like residual soil from trench excavation and domestic waste will also have impact on the plants. At the construction sites, the residual soil will inevitably fall on the plants and impede respiration and photosynthesis in leaves. Additional impacts on the vegetation include damages to the root and skin of remained trees due to incautious human or machinery working. However, such impacts can be controlled. (3) Impacts on wildlife Among original animals in the project region, the density of rodents is relatively high. Small rodents are common, e.g. house mouse (mus musculus) and cricetulus. Main birds include sparrows, barn swallows and larks. The construction may destroy their habitats and affect some individuals. However, the impacts on their communities are not major because of the large population and strong ability to adapt to changes of these two kinds of animals. 4.1.2 Acoustic Environment Assessment during the Construction Phase (1) Noise sources The main noise sources of the SHN during the construction include construction machinery and transport vehicles. Different machinery will be applied in different stages. In the SHN, excavator will be used for trench excavation; vehicles will transport pipelines during the pipeline laying; welding machines and generators will
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN be used for pipeline welding; crane will be utilized for pipeline laying and bulldozer will be used for backfill. All of these works will be carried out in daytime. The machines will be alternately applied and their positions will change as the construction goes on. In this EIA, references about equipment selected in similar constructions were analyzed. In light of the analogical analysis and field investigation, machines as noise sources that cause noise higher than 85 dB(A) were identified, including excavator, crane, welding machine, bulldozer, concrete mixer, cutting machine and transport vehicles. They are listed in Table 4.2-1. Table 4.1-1 Noise Intensity of main construction machines Unit: dB A No. Noise source Noise intensity No. Noise source Noise intensity 1 Excavator 92 5 Concrete mixer 95 Concrete dump 2 Crane 88 6 90 truck 3 Welding machine 85 7 Cutting machine 95 4 Bulldozer 90
(2) Noise prediction model When the sound source is much smaller than the prediction distance, the sound source can be seen as point source. The noise of the sound source attenuates as the distance increases. It is calculated as the following formula: r L L 20lg 2 2 1 r 1 Where r1 and r2 are distances to the sound source (m); L1 and L2 represent the noise levels at the points, the distances of which to the sound source are r1 and r2. (3) Results of noise prediction There are usually several different machines working at the same time in the sites. Their sound levels will be added. The added-value depends on the type, quantity and distribution of noise sources. Table 4.2-2 shows how the construction noise attenuates as the distance increases. Table 4.1-2 The Attenuation of Construction Noise Unit: dB A Distance (m) 10 20 40 80 100 200 400 800 1000 Excavator 80 74 68 62 60 54 48 42 40 Crane 76 70 64 58 56 50 44 38 36 Welding machine 73 67 61 55 53 47 41 35 33 Bulldozer 78 72 66 60 58 52 46 40 38 Concrete mixer 83 77 71 65 63 57 51 45 43 Concrete dump truck 78 72 66 60 58 52 46 40 38 Cutting machine 83 77 71 65 63 57 51 45 43
(4) Noise impacts during the construction phase The excavator will be used for a long period during the pipeline construction of the SHN. The noise intensity of such works is high and lasts long. Other machines, like concrete vibrating rod, concrete mixer, concrete dump truck, cutting machine and bulldozer can be operated intermittently, the noise of which lasts short. Thus, noise of excavators reflects the noise impacts of pipeline works. This EIA considers the excavators as representative noise sources during the Construction phase. As calculated, the noise level of excavators along the pipeline attenuates as the distance from both sides of the pipeline increases. The noise level ls lower than 54dB(A) at the point 200m away from the sound source. According to the
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN field investigation, many residential communities are located less than 200m away from the pipeline of the SHN. The noise sensitive points are listed in Table 3.5-1. The nearest community is about 10m away. It is confirmed that the acoustic environment of these points will be affected by the construction noise. The increases of noise level will be different at different points. It will be over the standard at the residential areas that are close to the pipelines. However, the construction noise is temporary and the noise sources are scattered. In addition, the construction is usually carried out in daytime. Acoustic environment will not be influenced at nights. Therefore, the impacts of construction noise on surrounding residents are not major. 4.1.3 Air Pollution Impact Assessment during the Construction Phase The air pollution sources of the SHN include construction dust and construction machinery exhaust. The impacts of construction dust are relatively significant. 4.1.3.1 Dust impacts during the construction phase The construction dust mainly comes from earthwork excavation, stacking, backfill and transportation. The dust generation and its impacts depend on the season, construction management and meteorological factors like wind force, etc. The dust impacts get severe if it is dry and windy. As analogized, under normal meteorological conditions with while mean wind speed of 2.6m/s, the features of construction dust on site are: the TSP concentration at the construction site is 1.5-2.3 times of that at the control point upwind. The TSP concentration at the point 150m downwind from the dust point in the construction site can reach about 0.49 mg/m3, which is 1.6 times of the air quality standard. Excavators and transport vehicles are most used during the pipeline construction. The dust due to earthwork excavation and the secondary dust due to transportation along the line will influence the air quality. The dust caused by backfill could also have impacts at the site and increase the TSP concentration. Table 4.1-3 presents the impacts and scope of dust influence of pipeline construction while the wind speed is equal to or higher than 3.5m/s and the relative humidity is equal to or lower than 60%. Table 4.1-3 Dust Impact and its Scope of Pipeline Construction Distance to the sites m 5 20 30 50 100-150 Dust concentration mg/m3 10.14 2.89 1.15 0.86 0.61
According to relevant research, dust generated by vehicles accounts for 60% total dust, the dust inventory and the pollution are closely related to mode of transport, road conditions and meteorological conditions, etc. The areas 150-300m away may be affected, in different situations. If watering the road 4-5 times per day during the construction phase, 70% of the dust can be reduced. The radius of area affected by TSP pollution can be reduced to 20-50m. The most used vehicles in this project will be heavy ones transporting pipelines, excavators and cranes, so construction site management should be implemented well to avoid dust pollution. Watering at sites shall be considered. The watering frequency and volume could be determined according to the real case. The construction shall be forbidden when heavy wind blows. 4.1.3.2 Impacts of vehicle exhaust emissions Construction machinery exhaust emissions refer to exhaust from fuel machinery and transport vehicles. Main pollutants include CO, NOx and hydrocarbons (CnHm), etc. The exhaust emissions are temporally and spatially focused. The concentration is high in a local area. Construction machinery like excavators and heavy trucks, etc. would enter in the construction site. As the Ministry of Transport measured and
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN calculated, the CO concentration of heavy truck is 37.23 g/km· vehicle; the NOx concentration is 10.80 g/km· vehicle; and the CnHm concentration is 16.83 g/km· vehicle. The machinery exhaust is unorganized non-point source, which would have negative impacts on the ambient air in the project area. However, such impacts that last not long will disappear while the construction is completed. 4.1.4 Water Environment Impact Assessment during the Construction Phase (1) Impacts of Pipeline passing the water body Jacked and overhead pipeline of the SHN will be used when it goes through the Heping Channel. The construction will not have impacts on the water environment. (2) Domestic wastewater Most of the works of this project will be carried out in urban areas. No temporary living facilities will be set. Local houses would be rented. The domestic wastewater is discharged into the municipal drainage. (3) Construction and pressure test wastewater During the construction, construction wastewater includes muddy water at the construction site, water at site, possible leak at nodes where new pipeline connects with old ones and wastewater generated from pressure test. The wastewater mainly contains suspended solid and slurries. The physical and chemical properties of the wastewater are similar with original water. It pertains to clean wastewater and is not harmful to soil environment. There will be about 10000 m3 wastewater generated from pressure test every day, which can be used for greening. The volume of rest wastewater is low as long as existing heating pipeline would not be damaged and water would not leak. The impact of wastewater will have minor impacts on the environment as it naturally evaporates and infiltrates. No vehicle wash place will be set in the SHN. Construction machinery including vehicles will be cleaned in local car wash. 4.1.5 Assessment of Solid Waste during the Construction Phase Solid wastes generated during the construction phase of the SHN include residual soil, construction waste and domestic waste. The residual soil is generated from trench excavation and site leveling of pressure-isolated heat exchange station and substations, etc. The residual soil is non- toxic solid waste. The leakage of soil during the transportation and disposal would have impacts on the environment. It would affect city’s visual appearance if the soil storage is not orderly due to vague disposal location. The construction wastes mainly include heat insulation materials and packaging materials of equipment and disable gray sand, concrete, broken bricks and rubble, building materials and processing waste at pressure-isolated heat exchange station and substations. If the waste could not be disposed in time, it would not only have visual influence, but also generate dust in windy and dry days. Domestic waste comes from staff living within the construction site. Un-orderly disposal of domestic waste would lead to breeding of mosquitoes and flies, which may make surrounding residents affected by mosquitoes, flies, odor and diseases. According to the feasibility study of this project, earthwork balance would be implemented well during the construction. The disposal of excavated earthwork will
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN be: being backfilled for heating pipeline and site leveling; being transported to landfills nearby; being used in greening. The construction waste shall be piled at designated sites in light of the requirements of “Administration Measures of Urumqi on Urban Construction Waste” and transported to the operating Urumqi Construction Waste Landfill. The domestic waste shall be piled at designated sites and transported to the Urumqi Landfill every day. Therefore, the solid waste during the construction phase will not have impact on the environment.
4.1.6 Social Impact Assessment during the Construction Phase
According to the field investigation, the SHN does not relate to resettlement issues. The project region is ethnic minority region. A special team has been commissioned to prepare the ethnic minority program. Thus, major social impacts during the construction phase refer to negative ones on people’s travel and traffic during the pipeline construction. 4.1.6.1 Impacts on Residents’ Travel The pipeline network of the SHN concentrates on road sections where commercial activities are busy and many residential areas are located. There are many sensitive points along the pipeline network. There are 32 residential areas, four schools and one hospital at the 200m regions away from the heating pipelines. According to questionnaire investigation, the most common way for the residents to travel is taking bus. The less common ways include walking, driving, taking taxi and taking corporations’/institutions’ bus. As the pipeline of this project will be laid along the roads, the impacts on residents’ travel is comprehensive. The key impacts are on the travels to working. Other travels, like shopping, children going to school and going to the hospital will also be affected. People that often go to the mosque are mainly old men. The affected population is relatively small, but impacts on individuals are significant. However, such inevitable impacts on residents’ life will last short and will stop as the construction is completed. 4.1.6.2 Impacts on Traffic The pipeline network will pass some busy road sections. For example, the DN1200 L1 pipeline network of the SHN will pass the special railway of Hongyanchi Power Plan when it goes out of the power plant. The pipeline will be laid along the north side of the railway to the west area. When it enters in Shayibake District, the pipeline needs to go 50m across Hetan Express Road. The Hetan Express Road is an important channel going from north to south of Urumqi. The L2 pipeline network will go eastward along Yining Road Changjiang Road Heilongjiang Road Baoshan Road Youhao Road and Qitai Road and then diverge. The two L1 pipelines will converge at Yanerwo Road. In addition, Huanghe Road, Zhujiang Road and Cangfanggou Road are also arterial roads. Some of road sections are narrow where the impacts of pipeline construction may become more significant. Thus, the pipeline works will have major impacts on the traffic along the project. 4.16.3 Impacts on Public Transport One of the impacts of pipeline construction on the public transport is the loss of passengers. The distance between stops increases, so the income of the Bus Company would decrease. Consequently, staff’s income would be influenced. The other impact is that the passengers would spend more time on the way to bus stops. It is also inconvenient for passengers if the bus stops and routes are changed.
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
4.1.6.4 Impacts on coach stations Nianzigou Coach Station and South Suburban Coach Station are two big stations in Urumqi. The buses travel to the north and south Xinjiang. It is busy in the station and there are many passengers. The pipelines will pass the roads surrounding the coach stations. Road excavation near coach stations will have two aspects of impacts. First, it will be inconvenient for passengers to enter in or go out of the stations. Second, it is hard to solve the issues about luggage transportation. The direct economic loss would reach 10%. 4.1.6.5 Impacts on Ethical Culture and Cultural Heritages According to the field investigation, two mosques lie in Xibei Road and Hetian II Street along the SHN. These mosques are general religious sites but not cultural heritage. Local culture should be respected during the construction. No cultural heritage was found along the project. However, the project goes through the old Urumqi, it is probable to find underground culture heritage. Thus, the construction should be stopped once culture relics is detected and this should be reported to environmental protection staff at the site. The environmental protection staff is responsible for protecting the site and informing the cultural heritage agencies that will cope with the issue. 4.1.6.6 Impacts on students’ travel Some sections of the pipeline network will go along the roads where students go to school. Some sections will go through the gate of schools. The impacts on schools include: (1) it is inconvenient for students to walk or take bus when they go to and off school; (2) the students would need to spend more time on the way; (3) safety issues would become significant because of traffic jam and un-orderly traffic.
4.2 Impact Assessment during the Operation Phase
4.2.1 Acoustic Environment Assessment during the Operation Phase Noise sources during the operation phase of the SHN include the pressure- isolated heat exchange station and substations. The pipeline would not cause noise impact. The acoustic wave would attenuate when it goes through the buildings in which the pressure-isolated heat exchange station, substations and peak balancing boilers are set. The acoustic wave would reach the prediction point after noise attenuation by distance, sound barriers and air absorption. The attenuation factors also include rain, snow, fog and temperature gradient, etc. Thus, the real noise attenuation in sound transmission process is higher than the predicted attenuation. That is, the predicted noise level is higher than real value at each prediction point. The acoustic impact is predicted as the following formula: A) Outdoor sound source Calculate the octave-band sound pressure level of the sound source at the prediction point = − r ∆− Loct (r) Loct (r0 ) 20lg Loct r 0 Where, Loct(r) represents the octave-band sound pressure level of the prediction point; Loct(r0) represents the octave-band sound pressure level of the reference point at
à à Environmental Impact Assessment Report for Component 1 of UDHP: SHN
r0; r represents the distance between the sound source and the prediction point, m; r0 represents the distance between the sound source and the reference point, m; and Loct represents the attenuation by various factors (including sound barriers, blocks, air absorption and ground effect, etc.) If the octave-band sound pressure level of the sound source Lw oct is already known and it can be seen as above ground, then L (r ) = L − 20lg r − 8 oct 0 w oct 0 Calculate the sound level LA produced by the sound source by combining the sound pressure level at each octave band B) Indoor sound source Calculate the octave-band sound pressure level of some sound source at an indoor point that is close to space enclosing structure as shown in the following figure = + Q + 4 Loct,1 Lw oct 10 lg 4πr 2 R 1 Where, Loct,1 represents the octave-band sound pressure level of some sound source at an indoor point that is close to space enclosing structure; Lw oct represents the octave-band sound power level of the sound level; r1 represents the distance between the sound source and the point that is close to space enclosing structure; R is room constant; and Q is direction factor.
Window
Sound source L1 L2
Indoor Outdoor