China - Shanghai Second Sewerage Project - supplementary statement of environmental impact assessment for reclamation project of wastewater treatment plant

Shanghai Second Sewerage Project Supplementary Statement of Environmental Impact Assessment for Reclamation Project of Wastewater Treatment Plant Shanghai Academy of Environmental Sciences Certification. No: 0931 February 1998  EIA Contractor: Shanghai Academy of Environmental Sciences Cooperator: East China Normal University Project Manager: Gu Yongzhi Fang Cuizhen Member: Wang Biao Liu Shuping Chen Banglin Xu Chentian Chen Qimin Project Supervis:on: Zhou Zhernii Report Review: Dai Liufang  Shanghai Second Sewerage Project Supplementary Statement of Environmental Impact Assessment for Reclamation Project of Wastewater Treatment Plant Content 1. OVERVIEW 1.1 The SSP4I Project 1.2 Main Conclusions from EIA for SSPII 1.3 Proposal of Reclamation for Establishment of Sewage Pretreatment Plant of SSPII 1.4 Purpose for Supplementary Statement Preparation 1.5 Basis of Environmental Impact, Assessment 1.6 Assessment Criteria, Scope, Phase and Sensitive Object 1.7 Environmentally Sensitive Objective 1.8 Assessment Priorities and Main Assessment Items 1.9 Technical Route for Assessment 2. GENERAL DESCRIPTION OF CONSTRUCTION PROJECT 2.1 Name, Place and Feature of Project 2.2 Proposal of Land Reclamation 2.3 Project Scale and Items 2.4 Land Utilization 2.5 Requirement and Source of Earth 3. CURRENT ENVIRONMENTAL STATEMENT OF THE ASSESSMENT AREA 3.1 Natural Environment 3.2 Ecology Environment 3.3 Social Setting 4. ANALYSIS OF IMPACT ON SEWAGE DISCHARGE FROM LAND RECLAMATION 4.1 Impact on Sewage Discharge of Second Shanghai Sewerage Project 4.2 Impact on Flow Conditions in This Water Area 4.3 Impact on River Bed Stability near Sewage Outfall Diffuser 4.4 Impact on Sewage Discharge Concentration Fields Distribution 5. IMPACT ON ECOLOGICAL ENVIRONMENT FROM LAND RECLAMATION 5.1 Historic Retrospect on Bailonggang Beachfront 5.2 Impact on Beachfront Vegetation 5.3 Impact on Fish Migratory Passage in Near-shore Shallow-water Zones at  Changjiang Estuary 5.4 In.pact on Fishing Ground outside Chang.jang Estuarv 6. IMPACTS ON SOCIO-ECONOMIC ENVIRONMENT 6.1 Impact on Social Environment 6.2 Impact on Economy 7. ANALYSIS ON CONFORMITY OF RECLAMATION PROJECT WITH REGIONAL PLANING 7.1 Conformity with Shanghai Overall Urban Development Objective 7.2 General Objective of Environmental Protection in Shanghai 8. ENVIRONMENTAL IMPACT ANALYSIS FOR CONSTRUCTION PERIOD 8.1 Main Environmental Impacts during Construction Period 8.2 Sources of Filling Earth and its Impact 8.3 Resource of Filling Earth 8.4 Construction Noise Impact Analysis 8.5 Impact of Construction Wastes 8.6 Impacts of Domestic Waste 9. MITIGATION MEASURES FOR ENVIRONMENTAL IMPACTS 9.1 Objectives 9.2 Mitigation Measures for Impacts of Filling Spoil 9.3 Mitigation Measures for Traffic Impacts 9.4 Mitigation Measures for Noise Impacts 9.5 Mitination Measures for Domestic Waste Impacts 9.6 Mitigation Measures for Odour Impacts 9.7 Mlitigation Measures for Impacts on Farmland 9.8 Mitiga,ion Measures for Fishery Impacts 9:9 ';ummarv of Mitigation Measures for Environmental Impacts 10. CONCLUSION AND RECOMMENDATION 10.1 Conclusion 10.2 Recommendation  Chapter 1 Shanghai Second Sewerage Project Supplementary Statement of Environmental Impact Assessment for Reclamation Project of Wastewater Treatment Plant 1. OVERVIEW 1.1 The SSPII Project 1.1.1 Overall Planning Shanghai is one of the most important industrial basis and the major center of economy, science and technology, trade, finance, information and culture in China. However, the urban service in Shanghai is not compatible with its development. At present, of 5 million m3/d of wastewater of the city total, 1.79 million m3/d is collected and discharged into the Changjiang estuary and the East China Sea from the West Trunk Sewer, South Trunk Sewer, and the sewers completed in the SSPI (Combined Sewerage Project Stage I), and the 280,000 m3/d of wastewater is treated by the wastewater treatment plant before discharging. Therefore, the rest of 59% of the total wastewater is discharged directly into the Huangpu River without any proper treatmnent, which causes a serious pollution in the Huangpu river the its tributaries. In order to protect the water quality at the water intake in the upper Huangpu River and to solve the wastewater discharging problem for the development and improvement of the investment environment in Pudong New Area, it is recommended that the SSPII project (Shanghai Second Sewerage Project) intercept the effluent generated from Minhang, Wujing, Pudong New Area and part of Xuhui and Luwan districts in Puxi (west of the Huangpu River) by a trunk sewer and discharge them into the Changjiang River through the outfall at Bailonggang. 1.1.2 Project Service Area and Population The project service area will be 21.7 km2 in part of Xuhui and Luwan district in Puxi, 155 km2 from south of Zhaojiagou in, Pudong, such as Lujiazui, Yangjing, Jinqiao, Zhangjiang, Beichai, Zhoujiadu, Yunlian, Yangsi, Liuli, and 92.1 km2 in Minhang and Wujing at the upper Huangpu River in Puxi. In total, the project service area will be 269.6 km2 with population of 2.757 million. 1.13 Designed Water Capacity and Water Quality The designed water capacity for SSPII is 1.72 million m3/d in the dry season. According to the water quality monitored for SSPII, the water quality designed for SSPII with the compliance rate of 95% is as follows; 1-1  Chapter I Table 1-1 Water Quality Designed for SSPII unit: mw-il Parameter SS BOD, COD NH l-N Phosphate T-P average concentration 130 85 199 22.7 1.0 3.9 compliancerateof9;% 175 112 248 27.7 1.3 4.2* * compliance rate oi 72% 1.1.4 Sewer Route * The effluent from Puxi will be intercepted by the present pump stations and collected into the southem trunk sewer of SSPII in Pudong after crossing the Huangpu River from Baibu Bridge in Longhua; * The southern trunk sewer is laid from the east of the Outer Ring Road to Jianping Road. connecting middle trunk sewer at Jianping Road: m The middle trunk sewer is laid from the east of the Jianping Road. along the north of Longdong Road and to the wastewater treatment plant at Bailonugang of Changjiang estuarv; * The total length of the sewers is 49.12 km. (Fig 1.1) 1.1.5 Wastewater Treatment Plant A phased proeram will be adopted to build the wastewater treatment plant. It is planned that a wastewater pretreatment plant with a dailv treatment capacitv of 1 .70 million m xvill be built at Bailonggang in the near future and meanwhile vacant land will be reserved for future construction of a secondarv treatment plant later. 1.1.6 Outfall The outfall will be situated at Changjiang estuarvy 1.6 km northeast awav from Heqing tow%nship. A head tank will be constructed and a main outfall 4200 mm inner diameter. and (one emergency outfall, will be built. The diffusion section mill comprise 6 risers with muitiple discharge ports. 1-2  Phasc I sernce ar I Changjiang P