China - Fourth Inland Waterways Project : environmental assessment (Vol. 2 of 10) : Naji Navigation Complex - environmental impact assessment report

E788 V. 2 April, 2003 Naji Navigation Complex Project of Youjiang River Navigation Construction of Guangxi Environmental Impact Assessment Report Environmental Protection Research Institute Guangxi Zhuang Autonomous Region April, 2003 1   Naji Navigation Complex Project of Youjiang River Navigation Construction of Guangxi Environmental Impact Assessment Report Environmental Protection Research Institute Guangxi Zhuang Autonomous Region April, 2003   < M e X 8 W:** m t-% K-HU g M; t tso~~H -Vi * B S R , 4" N | w Cm i E e ~ - m i -ie ZZ EE7 B^s t^S t*sB*;9 B* ,,^t tS MAII Ml rI6il~S6 - RI .1i 0,ZA I, #4.~   Name of Project: Naji Navigation Complex Project of Youjiang River Navigation Construction of Guangxi Project Category: Transportation, Water, Electric Power Project Sponsor: Guangxi Xijiang River Navigation Construction Development Co. Ltd. Environmental Assessment Documents: Environmental Impact Report Compiled by: Environmental Protection Research Institute of Guangxi Zhuang Autonomous Region Legal Representative: Li Min (Director) Technical Examination: Yu Wanli (Vice Director, Senior Engineer, License Certificate No. A29020014) Technical Approval: Ceng Guangqing (Senior Engineer, License Certificate No. A29020015) Project In-charge: Fan Zhenhui (Engineer, License Certificate No. A29020004) Participants: Gu Zhanqi, Luo Yaxue, Chen Qiuying, Fan Zhenhui, Li Shiyong, Gan Zhengqi Coordinating Unit No.1: Environmental Monitoring Station of Baise Prefecture of Guangxi Environmental Protection Research Institute of Baise Prefecture of Guangxi Legal Representative: Cen Xi (Director) Main Participants: Huang Xinye, Qin Honggang, Zhu Maoxing, Wang Geming, Li Ruiqing, Yang Shaozheng, Hu Guiying, Wei Jiliang, Zhou Zuhuan, Mo Li, Lin Zhiyi, Huang Hongyan, Zhou Xiaoqun, Tan Lili, Qin Jianmou, Luo Jinqin Coordinating Unit No.2: Guangxi Society of Ecology Main Participants: Wen Yuanguang, Zhou Fang, Zhou Jie, He Taiping, Liang Hongwen, Li Minjing, Song Weiping Compiled by: Environmental Protection Research Institute of Guangxi Zhuang Autonomous Region   EIA Report on Naji Navigation Complex of Guangxi (Outline) Chief Editor: Fan Zhenhui Participants & Duties Name Titles License Contents General, natural environment, social environment, Fan scenery, natural protection zone, environmental impacts Zhenhui Engineer A29020004 of electric powerlines, dam access road, highway, stacking yard and materials transport, soil erosion, conclusion Gu Zhanqi Senior Pollution sources, surface water, sand settlement, ___________ engineer A29020005 environmental economic gain and loss, indirect impacts Senior Environmental air, health of human being, Luo Yaxue engineer A29020006 environmental geology, local weather, public consultation, alternatives, cumulative effects Chen Project analysis, acoustic environment, treatment of Qiuying Engineer A29020008 navigating channels, environmental risk, environmental administration, monitoring plans Li Shiyong Engineer A29020007 Map making, public consultation survey Zhengi Senior A29020003 Public consultation survey Wen engineer A29020003 Weanping Researcher Ecologist Vegetation and plant resources survey and assessment He Taiping Associate Ecologist Vegetation and plant resources survey and assessment __________ professor _ _ _ _ _ _ _ Liang Associate Ecologist Vegetation and plant resources survey and assessment Hongwen researcher clgs Zhou Fang Professor Ecologist Genobenthos survey and assessment Zhou Jie Researcher Ecologist Aquatic organism survey and assessment Huang Senior Monitoring of present environment, public consultation Xingye engineer survey Zhu Senior Monitoring of present environment, public consultation Maoxing engineer survey Honggang Engineer Monitoring of present environment & analysis Wogang Wang Engineer Monitoring of present environment & analysis Gemn Li Ruiqing Engineer Monitoring of present environment & analysis Shaozng ngineer Monitoring of present environment & analysis Huiyhng Engineer Monitoring of present environment & analysis uiu Guuiin Engineer Monitoring of present environment & analysis We oi Engineer Monitoring of present environment & analysis Zhu Eu YZuung Engineer Monitoring of present environment & analysis Mio L Engineer Monitoring of present environment & analysis HuYng Engineer Monitoring of present environment & analysis houng Engineer Monitoring of present environment & analysis Hungang ogan Engineer Monitoring of present environment & analysis hiaoun Tuo nqin Engineer Monitoring of present environment & analysis Tan Ll Engineer _______Monitoring of present environment & analysis Jianmou EnierMntrnofpeetevrnet&alys Luo Jingin Engineer Monitoring 7of present -environment & analysis Wei Hong Expert of Survey of cultural relics cultural relics He anyi Expert of Survey of cultural relics cultural relics Li Minjing Ecologic survey Song Ecologic survey Weiping 2   EIA Report on Naji Navigation Complex of Guangxi (Outline) Contents 1 General .........................................................1 1I.1 The Purpose of Compilation of the Report .................................................................l 1.2 The Basis for Compilation of the Report ..................................................................l 1.3 Applicable Standards ................................................................. 4 1.4 Pollution Control and Environmental Protection Targets ...........................................................5 1.5 Work Context for Environmental Assessment ..................................................................8 1.6 Determination of Range for Assessment ................................................................ 11 1.7 Special Issues and Stress of Assessment ................................................................ 12 1.8 Organization and Division of the Assessment Work ................................................................ 13 2 Outline of the Project and Engineering Analysis .................................................... 15 2.1 Outline of the Project ................................................................. 15 2.2 Engineering Analysis ................................................................ 26 2.3 Pollution Sources of the Project Construction ................................................................ 39 2.4 Situation of Inundation and Migrant Removal of the Reservoir . ............................................. 42 2.5 Permanent Land Occupation by the Project and Treatment Measures . . 43 2.6 Compensation for Special Facilities and Construction Planning in Reservoir Area ... 45 2.7 Identification of the Factors for Environmental Impacts . ......................................................... 45 3 Survey of Environmental Present Situation and Assessment . . 48 3.1 Preface .............., 48 3.2 Geographic Location of the Dam Site ............................................................. 49 3.3 Brief Introduction to Natural Environment ............................................................. 50 3.4 Survey of Social and Economic Situation ................................................ 56 3.5 Brief Introduction to Regional Water-type Pollution .............................................................. 63 3.6 Survey of Present Situation of Ecological Environment ....................................................... 66 3.7 Investigation and Assessment of Present Situation of Environmental Air Quality in Construction Area ........................,.,,,.,.... ,.. 108 3.8 Investigation & Assessment on Present Situation of Acoustic Environmental Quality .......... 113 3.9 Investigation of Present Situation of Surface Water Environment & Assessment ................ 114 3.10 Investigation on Present Situation of People's Health in Evaluation Area ........................... 128 3.11 Evaluation on Present Situation of Substrate of Watercourse ............................................... 133 4. Prediction of Environmental Impact ......................................... 135 4.1 Prediction of Regional Water Type Pollution Sources ..................................... 135 4.2 Prediction of Aquatic Environmental Impacts ................................................................. 138 4.3 Prediction of Impacts on Ecological Environment ................................................................. 151 4.4 Prediction of Environmental impacts on air ............................................. 165 4.5 Prediction of the Impacts on Acoustic Environment of the Project . .......................... 167 4.6 Analysis of the Impacts on Social Environment ................................................................ 170 4.7 Analysis of the Impacts of the Project on Geological Environment . .......................... 178 I  EIA Report on Naji Navigation Complex of Guangxi (Outline) 4.8 Analysis of the Impacts of the Project on Local Climate ....................................................... 186 4.9 Prediction of Impacts of the Project on Silt Accumulation ................................................. 191 4.10 Analysis of Impacts of the Project on People's Health ......................................................... 195 4.11 Impacts of the Project on Regional Cultural Relics and Ecological Environment ............... 201 4.12 Analysis of the Impacts of Naji-Baise Electric Transmission Line on the Environment ...... 204 5 Analysis of the Environmental Impacts by Development of Material Source Fields & Transportation of Materials ............................................................. 209 5.1 Outline of the Environment of Material Source fields ........................................................... 209 5.2 Analysis of the Environmental Impacts by Development of Material Source fields .......... 210 5.3 Analysis of Environmental Impacts of Materials Transport ................................................... 211 5.4 Preventive and Treatment Measures ................................................................... 212 6. Analysis of Environmental Impacts Caused by Improvement of Naji-Nanning River Channel ............................................................. 214 6.1 Evaluation of River Channel ................................................................... 214 6.2 Outline of the Improvement Project of Naj i Damsite - Nanning River Section ................. 215 6.3 Outline of River Channel Improvement on Upper Reaches from Naji Damsite .................... 227 6.4 Environmental Impacts of Navigation Channel Improvement ............................................... 229 7 Evaluation of the Environmental Impacts of the Dam Access. Road ................ 237 7.1 Evaluation of the Environmental Impacts of Access Road .................................................... 237 7.2 The Environmental Impacts of Recovery Construction of Roads and Bridges in Reservoir Area ~~~~~~~~~~~................................................................................................................................................................. 250 8 Evaluation of Environmental Impacts of Soil Erosion ...................................... 253 8.1 Present Situation of Soil Erosion ........................................................... 253 8.2 Prediction of Soil Erosion ........................................................... 254 8.3 Preventive and Treatment Measures for Soil Erosion ......................................................... 257 9 Evaluation of Environmental Risks ...................................................... 268 9.1 Identification of Hazards ........................................................... 268 9.2 Analysis of Hazards Frequency ........................................................... 268 9.3 Analysis of the Consequences of Accidents ........................................................... 273 9.4 Preventive Measures and Emergency Measures ........................................................... 274 10 Environmental Protection Measures and Investment Estimation ..................... 281 10.1 Environmental Protection Measures in Construction Period ................................................ 281 10.2 Environmental Protection Measures in Operational Period ..................................I ............... 290 10.3 Environmental Protection Measures in the Environmental Sensitive Places ....................... 296 10.4 Summary of the Estimated Investment on Environmental Protection Measures ................. 297 11 Public Consultation and Announcemcnt of Public Consultation .................... 300 11.1 Public Consultation and Investigation before Outline Preparation .................................... 300 11.2 Public Consultation & Investigation after the Compilation of EA Outline .......................... 303 11.3 Public Consultation and Investigation at Preliminary Phase of the Report .......................... 310 2  EIA Report on Naji Navigation Complex of Guangxi (Outline) 11.4 Announcement of Public Consultation for Naji Navigation Complex Project ..................... 314 11.5 Summary ............................................................ 315 12 Analysis of the Environmental Impacts of Project Alternativess . ................. 316 12.1 Analysis of the Environmental Impacts of Site Selection .................................................... 316 12.2 Analysis of Environmental Impacts of Selection of Dam Line ......................................... 318 12.3 Analysis of the Environmental Impacts of Selection of Water Level Line ....................... 321 12.4 Comparison between Construction and Non-construction of Naji Navigation Complex in the Aspect of Environmental Impacts ............................................................ 324 13. Plans of Environment Monitoring and Administration . ....................... 326 13.1 Plan of Environment Monitoring ........................................................... 326 13.2 Environmental Administration ........................................................... 345 14 Analysis of Economic Loss and Benefit of Environmental Impacts . ............... 356 14.1 Analysis of Environment Economic Benefits ............................................................ 356 14.2 Analysis of Loss of Environmental Impacts ........................................................... 357 15 Conclusion and Suggestion .................................................... 360 15.1 Conclusion on Assessment ........................................................... 360 15.2 Suggestions ........................................................... 368 16 Analysis of the Cumulative effects .................................................... 369 16.1 Analysis of the Cumulative effects of Naji Navigation Complex ........................................ 370 16.2 Analysis of Cumulative effects of Development of River Basin .......................................... 373 16.3 Conclusion of Cumulative effects ............................................................ 377 17 Indirect Impacts ...................... 378 17.1 The Impacts on Transportation ......................... 378 17.2 The Impacts on Industrial Development .................................... 382 17.3 The Impacts on Agricultural Development .................................... 383 17.4 The Impacts on Social Economic Development .................................... 384 17.5 The Impacts on Regional Public Facilities .................................... 385 17.6 The Impacts on Regional Flood Control .................................... 386 3  EIA Report on Naji Navigation Complex of Guangxi (Outline) Contents of Appendices 1 Attached Maps 1. I Annex Map No. 1: Functional Distribution Map of Youjiang River Catchment Area 1.2 Annex Map No.2: Location Map of Naji Navigation Complex 1.3 Annex Map No.3: Longitudinal Profile for Step Development in Yujiang River Catchment Area 1.4 Annex Map No.4: Map of Three Strategic Water Channels of Guangxi 1.5 Annex Map No.5: Distribution Map of Construction Sites 1.6 Annex Map No.6: Traffic Map of Exterior Communication 1.7 Annex Map No.7: Distribution Map of Natural Construction Materials 1.8 Annex Map No.8: Location Map of Waste Ground 1.9 Annex Map No.9: The Map of Relationship between Three Natural Preservation Areas and the Navigation Complex in the Reservoir Area 1.10 Annex Map No.10: Distribution Map of Pollutant Sources around the Reservior Area 1.11 Annex Map No.1: Distribution Map of Vegetation of Naji Navigation Complex around the Reservoir Area. 1.12 Annex Map No.12: Present Situation of Land Utilization of Naji Navigation Complex of the Reservoir Area 1.13 Annex Map No.13: Sketch Map for Fish Spawning Ground around the Reservoir Area 1.14 Annex Map No.14: Distribution Map for Environmental Quality Monitoring 1.15 Annex Map No.15: Sectional View for Water Quality Monitoring in Youjiang River Section of Surface Water Control in Guangxi 1.16 Annex Map No. 1 6: Distribution Map for Taking Points of Drinking Water 1.17 Annex Map No.17: Sketch Map of Planning for Migration Relocation in Reservoir Area 1.18 Annex Map No. 18: Distribution Map of Dangerous Shoals of Baise-Nanning Water Channel. 4  EIA Report on Naji Navigation Complex of Guangxi (Outline) 1.19 Annex Map No. 19: Distribution Map of Environmental Planning Monitoring 2 Attached Lists 2.1 Annex No. 1: Plant List of the Reservoir Area of Naji Water Conservancy Project 2.2 Annex No.2: Wildlife List of the Reservoir Area of Naji Water Conservancy Project 3 Appendix 3.1 No. 1: Power of Attorney for Environmental Impacts Assessment 3.2 No.2: Letters to the World Bank written by the chief administrative officers of the project location at various administrative levels 3.3 No.3: Questionnaire for public consultation 3.4 No.4: Announcement of Public Consultation on Youjiang Daily 5   7 +, ~~~~Rilver system of YU JIANG valley :'S ~~~'NA%e '>S Legend t; Hyl. drological station() \ / 7 > later level measu gs t tion /gg t _ Planning steppingpoe : _ Have been built water ke; control project / * YMeteorologicul observatory\ : -H~~]oundary line of valley   , :, ^ s - v { , 1 11 2.i. l b- Consulting the masses at FU LU village Consulting with the masses in NA PO town hall Consulting the masses at NA JI village Consulting the masses at DA WAN village Consulting the masses at SHA ZHOU village Consulting the masses at SHANG QIN village   s ~ ~ ~ f - : ze= - Present natural condition of stone Present condition of stone stock mining Stone crashing site in NA LAO stock unmining site in NA LAO site in NA LAO -~ ~~ ~~~~~ ~~~~~~~~~~~ - . Present natural condition of borrowing Immigration settlement (PO LUO) Immigration settlement (CHONG KOU) clay site (on the hill)   EIA Report on Naji Navigation Complex of Guangxi (Outline) I General 1.1 The Purpose of Compilation of the Report The project of Naji Navigation Complex (including channel regulation, dam access roads / bridge) intends to apply for loans from the World Bank for construction. Normal water storage level of the project is 115m, dead water lever 114m, dam height 22.5m. The project will submerge 272.44ha farmland and 369 persons have to be migrated. According to the principle of classification of the works of environmental impact assessment for WB projects, this project shall be evaluated as A category. Therefore, it is necessary to conduct detailed and overall work for environmental impact assessment. The targets are to investigate and evaluate the existing situations of nature, society, ecology, air, noise, surface water, bottom mud, cultural relics and the inundated area, as well as to consult the public opinions on the proiect, thus to further undertake qualitative and quantitative analysis of the possible impacts caused by the project construction. This will help to predict, demonstrate and analyze the degrees and ranges of environmental impacts caused by the project construction, and propose the plans and executive schemes for environmental protection, hence to minimize the environmental impacts of the project and realize the goal of coordinating development of economic construction and environmental protection. In this way, the construction of Naji Navigation Complex shall conform to Chinese laws and regulations on environmental protection and the requirement of the World Bank in this connection, thus providing with the scientific foundation for the environmentalr management of the project. 1.2 The Basis for Compilation of the Report 1.2.1 Laws and Regulations 1.2.1.1 Laws of the People s Republic of China for Environmental Protection, 1989.12.26; 1.2.1.2 Laws of the People s Republic of China for Water, 1988.1.2; 1.2.1.3 Laws of the People s Republic of China for Prevention and Treatment of Waste Water Environmental Pollution, 1996;  EIA Report on Naji Navigation Complex of Guangxi (Outline) 1.2.1.4 Laws of the People s Republic of China for Prevention and Treatment of Solid Wastes Environmental Pollution, 1995.10.30: 1.2.1.5 Laws of the People s Republic of China for Prevention and Treatment of Environmental Noise Pollution, 1996.10.29; 1.2.1.6 Laws of the People s Republic of China for Flood Control, 1997.8.29; 1.2.1.7 Laws of the People s Republic of China for Conservation of Soil and Water, 1991.6.29; 1.2.1.8 Laws of the People s Republic of China for Conservation of Wild Life, 1988.11.8; 1.2.1.9 Regulations Concerning Environmental Administration for Construction Projects, 1998.11.18; 1.2.1.10 Regulations of the People k Republic of China Concerning River Management, 1988.6.10; 1.2.1.11 List of Wild Life for Special Protection of the State, 1989.1.14; 1.2.1.12 Regulations for Implementation of the People s Republic of China Concerning Protection ofAquatic Wildlife; 1993.9.14; 1.2.1.13 Regulations of Guangxi Zhuang Autonomous Region Concerning Environmental Protection, 1999; 1.2.1.14 Rules Concerning Protection of Fundamental Farmland 1998.12.27; 1.2.1.15 Notice on Strengthening Environmental Impact Assessment of Projects Aided by International Financial Associations, Ref. JZH[1993]324 issued by four Ministries and Committees inclusive of the State Environmental Protection Bureau; 1.2.1.16 O.D4.01 The Guidance of the World Bankfor Environmental Assessment; 1.2.1.17 0.D4.01 The Operation Guidance of the World Bank; 1.2.1.18 Laws of the People s Republic of China on Preservation of Cultural Relicsl999.7; 1.2.1.19 Provisions of Guangxi Zhuang Autonomous Region Concerning the 2  EIA Report on Naji Navigation Complex of Guangxi (Outline) Management of Preservation of Cultural Relics, 1997.10. 1.2.2 Concerned Documents for Construction of the Project 1.2.2.1 Approval of the Integrative Planning of the Pearl River Basin issued by the State Council of the People's Republic of China, May of 1993; 1.2.2.2 Approval of the Comment Report for Yujiang River Comprehensive Utilization Planning of Xijiang River Water System of the Pearl River Basin issued by the State Planning Commission, April of 1985; 1.2.2.3 The Comment Report on Yujiang River Comprehensive Utilization Planning of Xijiang River Water System of the Pearl River Basin issued by the People's Government of Guangxi Zhuang Autonomous Region and Ministry of Water Conservancy and Electric Power, April of 1985; 1.2.2.4 The Report on Comprehensive Utilization Planning of the Pearl River Basin issued by Water Conservancy Committee of the Pearl River of the Ministry of Water Resources, June of 1986 1.2.2.5 The- Report on Flood Control Planning of the Pearl River issued by Water Conservancy Committee of the Pearl River of the Ministry of Water Resources, December of 1999; 1.2.2.6 The Feasibility Study Report for the Project of Naji Navigation Complex of Youjiang River Navigation Construction of Guangxi compiled by the Research Institute for Transportation Survey and Design of Guangxi Zhuang Autonomous Region, May of 2002; 1.2.2.7 Letter of Attorney for Environmental Impacts Assessment for Naji Navigation Complex of Youjiang River Navigation Construction of Guangxi issued by Guangxi Xijiang River Navigation Construction Development Co. Ltd., May of 2001; 1.2.2.8. Request for Approval of Proiect Proposal for Naji Navigation Complex Proiect in Youjiang River of Guangxi by the State Planning Commission, Ref. [20021719. 1.2.3 Technical Standards 3  EIA Report on Naji Navigation Complex of Guangxi (Outline) 1.2.3.1 Technical Guidance for Environmental Impacts Assessment (HJ/T2.1-2.3-93); 1.2.3.2 Technical Guidance for Environmental Impacts Assessment - Ecological Impacts of Non-pollution (HJ/TI9-1997); 1.2.3.3 Technical Guidance for Environmental Impacts Assessment - Acoustic Environment (HJ/T2.4-1995); 1.2.3.4 The Standards for Environmental Impact Medical Assessment for Water Conservancy and Electric Power Projects (GB/Ti6124-1995); 1.2.3.5 The Standards for Environmental Impact Assessment for Water Conservancy and Electric Power Projects, SDJ302-88 (try-out) 1989; 1.2.3.6 The Standards for Environmental Impact Assessment for Road Construction Project, JTJO05-96 (try-out); 1.2.3.7 The Standards for Environmental Impact Assessment for Port Construction Projects, JTJ226-97; 1.2.3.8 The Standards for Environmental Impact Assessment for Planning of River Basin, SL45-1992; 1.2.3.9 The Standards for Comprehensive Treatment of Waster and Soil Conservation, (GB/Tl 6453.1-16453.6-1996); 1.2.3.10 The Standards for Technical Schemes for Water and Soil Conservation for Development Construction Projects, SL204-98; 1.2.3.11 The Standards for Reservoir Inundation Design for Hydro-electric Projects, (DJ/T5064-1996); 1.2.3.12 The List of Classified Administration for Environmental Protection for Construction Projects. 1.3 Applicable Standards 1.3.1 Environmental Quality Standard 1.3.1.1 The environmental quality standard for surface water adopts Environmental Quality Standardfor Surface Water (GB3838-2002) , of which, the section from the damsite to Baise of upper reaches and the section to Yuliang of lower reaches adopting 4  EIA Report on Naji Navigation Complex of Guangxi (Outline) Class II water quality. The water quality for Fulu adopts Class II. 1.3.1.2 The air quality of the construction site shall adopt Environmental Quality Standardfor Air (GB3095-1996) , of which, Class II in construction period and Class I after completion shall be applicable. 1.3.1.3 The acoustic quality in construction site adopts Environmental-Noise Standard in Urban Regions (GB3096-93) , of which, Class IV in construction period, Class II after Complex completion, Class I for schools and Class II for residential areas shall be applicable. 1.3.2 The Standards for Pollutant Discharge 1.3.2.1 Discharge of waste water shall adopt Class I of the Comprehensive Discharge Standards for Waste Water (GB9878-1996) 1.3.2.2 Discharge of air pollutants adopts concentration limit values of unarranged discharge specified in Comprehensive Discharge Standards for Air Pollutants (GB16297-1996); vehicle gas discharge adopts the Discharge Standards for Vehicle Air Pollutants (GB14761.1-14761.7-930); motorcycle gas discharge adopts the Discharge Standards for Motorcycle Air Pollutants, GB14621-93; discharge of stink pollutants adopts Class I of factory -boundary specified in the Discharge Standard for Stink Pollutants (GB14554-93); 1.3.2.3 Noise refers to the Noise Limits in Construction Sites (GB12523-90) 1.3.2.4 Oil discharge adopts the Discharge Standardfor Ship Pollutants, GB3552-83. 1.4 Pollution Control and Environmental Protection Targets 1.4.1 Aquatic Environmental Protection Targets During the construction period, the places under the aquatic environmental impacts are mainly the upper and lower reaches of the damsite and the waterway from Naji to Nanning. The impacted areas in this regard during the operational period will be the reservoir areas, the upper channel from the damsite to Baise Water Conservancy and the river channel. from Naji to Nanning. Protection of the use functions of water environment of these water areas will not change with the construction of the  EIA Report on Naji Navigation Complex of Guangxi (Outline) Navigation Complex. The standard for protection of water quality in each river section is referred to Table 1.4-1. Environmental Quality Standard for Surface Water (GB3838-2002) Table 1.4-1 unit:mgfL Items Class II Class III pH 6-9 6_69 Chloride <, 250 250 Sulfate, 250 250 DO 6 5 CODmn S 4 6 BOD5 3 _ _ __ _ _4 NH3-N 0.5 1.0 Total Cu < 1.0 1.0 Total Pb < 0.01 _ 0.05 Total Cd < 0.05 0.05 Total Hg < 0.00005 0.0001 Cr' 1. -00 0.05 Total cyanide a 0.05 0.2 Phenol < 0.002 0.005 Flupride 1.0 1.0 As < 0.05 0.05 Petroleum <- 0.05 0.05 SS S- 150 150 Remarks: D Class ll is applicable to Grade I protection area for source of drinking water for concentrated living, habitats for rare aquatic life, sprawning ground for fish and shrimp, feeding fields for young fish etc.;