China - Zhejiang Power Development Project : environmental assessment report (Vol. 4 of 6)

Supplemental Environmental Impact Assessment Report on Extension of No. 5 Set for Phase II Project Beilungang Power Plant East China Electric Power Design Institute of Ministry of Electric Power Industry October 1994 Agency in charge of the task: East China Electric Power Design Institute, Ministry of Electric Power Industry Chief engineer* Peng Changfa Chief engineer of design: Zhang Bilang Pemon in charge of the task: Jing Huiliang Participants in cmying out the task: Jing Huiliang Li Youfang Cooperative unit Air Pvsics Research Institute of China's Science Academy Estuarine and Coastal Engineering Institute of Zhejiang Province Translator: Zhao imwen Centent 1. Introduction 2. Brief Description on Surroundings of Site 3. Engineering Analysis 4. General Situation of Main Pollution Source 5. Air Environmental Impact Assessment 6. Water-Body Environmental Impact Assessment 7. Current Status of Environmental Noise and Its Impact Assessment 8. Environmental Impact Assessment on Coal Dock 9. Investment for Environmental Protection 10. Major Findings of Assessment Attachment State Environmental Protection Bureau's Huanjian [1993] No. 0134 Document - A REPLY RE REVIEW AND APPROVAL OPINIONS ON ENVIRONMENTAL IMPACT ASSESSMENT REPORT FOR PHASE II PROJECT OF BE[LUNGANG POWER PLANT 1. Introduction Environental Protection Science Research Institute of Zhejiang Provincc, responsible for the pseparation of the Environmental Impact Assessment Report on Phase II Project of Beilungang Power Plant on a extension scale of 2 * 600 MW sets, in cooperation with East China Power Design Institute and Zhejiang Estuarine and Coastal Engineering Institute, completed the ENVIRONMENT ASSESSMENT Report FOR THE SECOND PHASE OF BEILUNGANG THERMAL POWER PLANT PROJECT. In March 1993 the State Environmental Protection Bureau issued Document Huanjian [1993] No. 134, A REPLY CONCERNING REVIEW AND APPROVAL OPINIONS ON ENVIRONMENTAL IaACT ASSESSMENT REPORT FOR PHASE II PROJECT OF BEILUNGANG POWER PLANT, allowing the construction of Phase U Project of Beilungang Power Plant. The Report was submitted to the World Bank in April, 1994. Whereas construction funds are available and the performance in the implementation of Phase I Works, the State Planning Commission has agreed to add an additional set in the construction of Phase U Project. Thus a supplemeary environmental impact assessment work has been carried out for No.5 Set extension of Phase II Project. The main bases, standards for assessment, and enviromnental background data involved in the Supplementary Report, are shown in ENVIRONMENT ASSESSMENT REPORT FOR THE SECOND PHASE OF BEILUNGANG THERMAL POWER PLANT PROJECT (2 * 600 MW) , which was submitted to the World Bank in April, 1994. 2. Brief Description on Surroundings of Site 2.1 Geographic Location of Site Beilungang Power Plant is situated to the east side of Suanshan, Beilun District, Ningbo City, I km from Suanshan, 2 km from Qianmu'ao Reservoir, adjacent to the crude oil dock of Zhejiang Oil Refining Plant, 6.5 km in the east from the ore transferring dock of Beilun Harbor, on the west side of Jintang Watercourse of Hangzhou Bay. to its northeast facing Jintang Island of Zhoushan, and to the southwest closely adjacent to the road from Zhenhai through Xinqi to Beilm Harbor. The Plant is 26 lan from the old city proper of Ningbo, 35 km by waterway from Sanjiangkou, city proper of Ningbo. For the geographic location of the site. see Fig. I and Fig. 2. I Shanghai . HaHgngzhou Bay .. Hangzhou.- Ningho Zhejiang Province - . Powir Oknt East Sea Fig. 1 Beilungang Power Plant's Geographic Location in Zhejiang Province ／一＇于 LP gel å- å. Kåpa -Win g, 01 sz, rs- rm- (A z fil n n 01 Er 9 0 Kr FR ch 01 PR, rik to g@ ýp 0;1 Fig. 3 Wind Roses of Beilungang (Bellun Harbor) Area A/ Al I m/s = I measure I % measure Beilun Wind Speed Rose Bcilun Wind Direction Rose f Time: 1984 - 1986 Observatory Point: Beilungang Meteorological Observator' 1. The Plant is located on the south bank of Jintang Watercourse. The main island of Zhoushan Islands, Jintang Island, Daxie Island and Huangmang Island are natural defenses for the Plant Main waves are stony waves locally occurring. Jintang Watercourse is deep with swift currents. Because of tidal effect the Watercourse has great capacity of water exchange. The tide in this sea area is of half-day. The flowing direction of spring tide is from the east to the west, and that of ebb tide from the west to the east. The average tide rising duration is 5 hours and 59 minutes, and the average tide ebbing duration 6 hours and 23 minutes. 2.4 Natural Resources The major fresh water resource in Beilun District is the Yantai River System. Fishes are bred in the water areas of Xinqi and Deqi, the Yantai River. The soils in the District are saline soiL tide-soil, paddy soil and lateritic soil, distributed in epicontinental sedimentation stratum with thick soil having abundant nutrients, suitable to plant cotton. The paddy soil is spread in river-veined plain, whose soil is clayey, suitable for rice growing. In the southeast of the District, there is a hilly area, which teems with bamboo, tea and peaches besides woods. Tiantong Tree Farm is located to the right south of the Plant with a distance of 15 km. The Tiantong Temple is in the Farm. Near Baochuang (Treasured Column) there is A'yuwang Temple. During the appraisal on Phase II Project the authorities concerned required that Class II Standard be adopted to assess the air environmental impact. But it was decided to adopt Class I Standard in this Supplementary Report to assess the impact of No.5 Set of the Plant on the areas of Wuxiang and Baochuang in order to well protect these trees and cultural objects. 3. Engineering Analysis 3.1 Name of Project Phase II Extension Project of Beilungang Power Plant 3.2 Construction Scale and Total Investment Three generating sets (600 MW/each) of stearn-condersing and coal-buming type will be installed in Phase II Extension Project. The scale and the type of the sets are identical to those of Phase I. After the extension the total installed capacity will be 3000 MW. The total investment of Phase II Project is about 6.0 billion yuan (RMB). 6 J. 3.3 Summary on Phase I Project 3.3.1 Brief Introduction The two sets (600 MW/each) of Phase I Project weLe funded by the World Bank. The equipment of the sets was procured in ICB mode. Total investment was 2.79 billion yuan. The construction of the first set started in April, 1984, and it was put into operation in April. 1991. The construction of the second one started in October, 1990, and put into operation in October. 1994. In order to meet the demand for fuel transportation, one specific coal-unloading berth of 35000-50000 tonnage and one heavy goods handling berth (also for unloading fuel oil) of 3000 tonnage were built up for Phase I Project. In addition, supporting systems for Phase I Project, such as ash and cinder removing system, fresh water supplying system, recirculation water exracting and discharging system and corresponding productive supporting and auxiliary facilities and domestic facilities were built up in Phase I. 3.3.2 Coal Source It was clearly defined in the Design Task Document issued by the State Planning Commission that Northern Shanxi coal, which is used by power plants as fuel, should be used for Phase I Project, transported via Da-Qin (Datong to Qinhuangdao) route (railway) and then to the Plant by sea. 3.3.3 Coal Consumption and Coal Quality and Ash Content Analysis For analysis on coal quality and ash content, see Tables I and 2; and for coal consumption, see Table 3. 3.3.4 Type and Efficiency of Precipitator Electrostatic precipitators are used for the 2 sets (600 MW/each) of Phase I Project. Five-electric-field electrostatic precipitators were selected to be used for No.1 Boiler made by CE Inc., USA and No.2 made by B & W Inc., Canada. Their dust removal efficiency is 99.60%. 7 3.3.5 Chimney A 240 m high chimney with an internal diameter of 7 m was erected for each of the No.1 and No.2 Boilers. According to the prescription for calculation of fume exhaustion, when a boiler is at rated load, the fume flowing speed at the outfall shall be greater than 1.5 times the average wind speed at the same height of the outfall. When the No.1 and No.2 Boilers are at rated load and the coal of the designed type is burnt for them, the speeds of fume flows at their outfals are 23 m/s, much more than 1.5 times the average wind speed, 7.7 m/s, at the height of 240 m in this area. Table 1 Northern Shanxi Coal Quality Analysis item Coal Type Designed Element Analysis (application basis) Carbon C! 58.6 Hydrogen H' 3.36 Sulfur Sr 0.63 Oxygen O' 7.28 Nitrogen NY 0.79 Ash AY 19.77 Water WY 9.61 Industbial Analysis (application bcsis) Inflammable Volatile VY 22.02 Fixed Carbon - Cy 47.8 Ash A7 19.77 Water W' 9.61 Low-heating Value Q'DW (kJ/kg) 22426 Hardgrove Number 54.81 8 3.3.6 Water Source The Plant is by Jintang Watercourse, the East China Sea. Therefore sea water is abundant but fesh water limited. To this end, two water supply systems, one for sea water and the other for fresh water are set up in the Plant. For recirculating water of the condensers, cooling water of water-water exchangers, cooling water of vacuum pumps and ash washing water, direct water supply system is adopted, the (sea) water is directly drawn from Jintang Watercourse. And the fresh water is used as boiler feeding water, closed industrial cooling water, service water, water for fire fighting and domestic water. The fresh water sources for Phase I Project are the Xinlu'ao Reservoir and the Yantai River System. And the Qianmu'ao Reservoir is a specific regulating fiesh water reservoir for the Plant Table 2 Northem Shanxi Coal Content Analysis Coal Content Coal Type Designed Fe,Ol 23.46 CaO 3.93 MgO 1.27 Na20 and K20 2.33 SiO2 50.41 Al203 15.73 TiO2 1.00 S03 2.05 P203 1.67 Temperature of Ash Melting Point Deformating Temperature tj 1110 0C Softening Temperature t2 1190 OC Melting Temperature t3 1270 OC 9 3.4 Technological Process Technological process of a thermal power plant is that raw coal is sent into boiler to burn making chemical energy transfered into heat energy, meanwhile heating water to be high temperature and high pressure seam; the steam expands and does work in a turbinc transferring heat energy into mechanical energy; and the turbine makes a generator rotate, transferring the mechanical energy into electric energy. For the technological process of the Plant, see Fig. 4. Main productive systems are as below. 3.4.1 Fuel Transportation and Combustion System Fuel is transmitted from a coal storage yard to boilers. Ash, cinder and flyash below precipitators are generated after coal burning in the boilers. The fume is exhausted into the air through precipitator, air drawing machine and chimney. 3.4.2 Ash and Cinder Removal System The ash and cinder are trnsmitted through pipelines to a designated place ( Ash Yard or comprehensive-use spot). 3.4.3 Steam and Water System After doing work the steam is exhausted into condensers for condensation, and after being boosted, heated and dcoxygenated, returns to the boiler. After treatment, feeding water is delivered to the steam and water system to replenish in steam-water cikculation. Cooling recirculation water takes away the latent heat released in tbe process of sainm condensation. 3.4.4 Electric System and Control System 3.5 Fuel According to the opinions in the State Planning Commission's REPLY TO THE PROJECT PROPOSAL, fuel coal to be used for Phase II Project will still be supplied by Northern Shanxi Coal Field. 3.5.1 Coal Consumption For coal consumption, see Table 3. Coal quality and ash content analyses are shown respectively in Tables I and 2. 10 Table 3 Coal Consumption of Phases I and II Projcts Coal Type Northem Shanxi Coal Capacity t/h tId 1000,000 t/a 2 * 600 MW (Phase I) 577.44 12703.6 3.7534 5 * 600 MW (Phases I and II) 1443.10 31759.2 9.3835 3.6 Water Source and Volume The water sources and extracting type of Phase II Project are identical to those of Phase 1. Fresh water intake pumping station, feeding water pumping station and corresponding pipelines were constructed during the construction of Phase I Project, which can also meet the demand after Phase II Project is put into operation. The faciliteis mentioned above need not be extended for Phase II Project Fresh water consumption is shown in Table 4. Table 4 Fresh Water Consumption of Whole Plant (Unit: 1000 m/a) Item 5* 600 MW Domestic Water 840 Chemical Water 2900 Industrial Water 6380 Others 2020 Total 12140 11 ，・．プー＿- 3.7 Lmd Occupation and Fixed Number of Personriel lle site of the Plant occupies land of 81.8 ha. Project 13 Project will be extended within the land acquired during Phase 1. A fixed number of personn6I of the whole Plant for Phase I Projea is 590 pcrsonL and that for Phase U Project 390. When the capacity reaches 3000 MW, the total fixed number of the pammel of the Plant will be 960 persons. 4. Generd Sibukdon d Main Polludon Sources A great amount of coal will be bum and a great volume of water used in the operation process of a thermal power plant. When coal is bmnirig, a greal quantity of fume is being produced. Main pollutants of fmnc exhaiLsW by a therrixal power plant are S02, and flyash. Meanwhile, a great quantity of solid cuxler is generated after coal burning. Contents of water discharged are ddfi=t after the water is used for different purposes. For exaniple, pH value of the water discl:wged from chemical water treatment systan is on the high side; as for ash water, pK trace heavy metals and SS should be mken into account. And thermal water disclwged from water recirculation system should also be considered. In addition, nDise impact of generating sets, other supporting equipment and various kinds of exhausting must be taken mto amount. Therefore it is absolutely necessary for adopting various efficient treatment measums to immprehensively analyze strengths Of EhffCrCRt pollution soam:s, discharge modes, discbne periods and discharge indores, etc. 4.1 Air Pollution Source 4.1 .1 Quantities of Air PoUutants Exhausted See Table 5. Table 5 Quantity ofAir Pollutants Bdmisted. CapacitY Flyash S% 2 * 600 MW 0.429 9.439 2789 6A62 142-164 42003 (Phase I) A t1d t/a tth tId Va 3 * 600 MW 0.644 14.168 4186 9.693 213.246 630043 (Phase 11) A t/d Va A tId Itta 5 * 600 MW 1.073 23.606 6975 16.155 355.410 105009 (Whole PIM) t/h t/d t/a A tId tfa Note: In calculation, one day is regarded as 22 hours and one year 6500 hours. 13 Parameters adopted in calculation for quantities of above mentioned pollutants exhausted are as the following: Coal Consumption Pg - 288.72 t/h (each boiler) Ash Content of Fuel Coal A7= 19.77% Sulfur Conteit Sr= 0.63 % Low-Level Thennal Value QDw =22426 kJ/kg (5360 kcal/kg) SO Discharging Coefficient K= 0.9 Dust Removal Efficiency it = 99.6 % Desulfation Efficiency Iq5= % 4.1.2 Exhausting Mode The fume of the two 600 MW sets of Phase I Project individually passes through a 5- electric-field precipitator, enters into a 240 m high chimney, and then is exhausted into the air. It is proposed to adopt broad-interval-type electrostatic precipitator for Phase 1B Project. The height of the chimney for Phase II Project is still 240 mo, but its combination type is different from that of Phase L one chimney for each boiler. On the basis of the air environmental impact analysis, it is appropriate to adopt one grouped chimney for No.3. No.4 and No.5 boilers. The chimney has an external concrete tube inside which there are three straight steel tubes with a diameter of 6.5 m. From environmental viewpoint, one combined chimney for three boilers can raise thermodynamic effect on the fume so as to abate pollution concentration close to the ground. Therefore it is decided to adopt one combined chimney for three boilers. 4.2 Water Pollution Source One complete set of waste water treatment system has been built up for Phase I Project, separately treating various categories of waste water with different water quality. After being treated, all the waste water of various categories can meet Class 2 standard value of Standard for Comprehensive Discharging Waste Water (GB 8978-88) issued by the state. Phase 11 Project will make best use of the existing treatment facilities and the capacity of the equipment, and adequately raise utilization rate of the wastewater treatment system, meanwhile some equipment will be added appropriately so as to meet the demands of the Plant operation. Phase II Project's wastewater of various categories are described as below. 14 4.2.1 Regular Productive Wastcwater (Category I Wastewater) One additional set of regular wastewater treatment system will be installed for Phase II Project. Its modes of storage and treatment will be identical to those of Phase 1, namely, wastewater storage pond, neutaliztion pond and associated mixing device and chemical dosing equipment After installing the additional set of treatment equipment, the regular productive wastewater treatment system can meet the demands of the five 600 MW sets. Wastewater volumes are shown in Table 6. Table 6 Category I Wastewater of Phases I and I Projects Item Phase I No. 3 and No. No. 5 Set Total 4 Sets Volume Water feeding system 160 80 40 280 regenerated wastewater Condensation system 212 212 106 530 regenerated wastewater Polluted water discharged 605 605 303 1513 Ground and equipment 540 540 270 1350 washing water Lab wastewater 10 5 15 Total 1527 1442 719 3688 4.2.2 Irregular Productive Wastewater (Category 2 Wastewater) Wastewater of Category 2 is washing water for preheating device, washing water for boiler having been washed by acid, and water discharge from coal yard, etc. Instantaneous flow of the wastewater of such category is great, volume of water concentrated, and water quality complicated. Therefor in the process of treatment, oxidizing, coagulating and sludge dewatering need to be conducted. For Chart of Process, see Fig. 5. 15 MsOW pod poMtnktn tank basi C81wgow I aw SIndge Fig. 5 Irregular Productive Wastewater Treatment Process Though treatment process for Category 2 wastewater is comparatively complicated, the wastewater of this category is not frequently produced. For a 600 MW set, acid washing is conducted once every 3 - 4 years, was preheating device once a half year. Maximum washing water volume is estimated 8000 m /once, and the capacity of the treatment system is 100 m"/h, therefore only 80 hours is needed to finish the treatment The system needs to run for at most one month every year, even necessary chemicals preparation. equipment maintenance and actual operational conditions on site arc taken into account. It can be seen that the capacity of this treatment systern has a surplus room. The volume of the wastewater storage pond is 8500 m3, enough to store the maximum inflow of water of or. time. After Phase II Project is completed, the treatment facilities can still meet the demands of wastewater storage and treatment for Phase II. Therefore the system is not considered to be extended for Phase II Project, but made full use of itself and raised utilization rate. Total volume of Category 2 wastewater of Phases I and El Projects are shown in Table 7. 4.2.3 Boiler Acid Washing Water (Category 3 Wastewater) Burning method is adopted to treat the wastewater of Category 3, whose main constituent is organic citric acid. For the boiler acid washing water treatment process char, see Fig. 6. Table 7 Category 2 Wastewater of Phases I and H Projects item Wastewater Volume Occurrence Period Annual Total Volume Air preheater 8,000 m%lunittonce once a half year 80,000 ina washing water Washing water after 2,250 once every 2 years 6,750 m/a boiler acid washing m3/urit/once Coal yard drainage 100 m/h uncertain 172,000 mla 16 Considered that a boiler is washed by acid once every two years, and the amount of organic acid waste water produced is 4500 m3 each time, the annual total amount of waste water generated by Phases I and U Projects will be about I1250 m3, which can be burnt up in about 3 months at the burning efficiency of 5 m/h. The burning device was installed in Phase 1. therefore this treatment system needs not be extended in Phase U. IAcid orland!alal Fig. 6 Boiler Acid Washing Wastewater Treatment Process 42.4 Drainage from Coal Yard Coal Yard drainage is composed of two parts: one is rain water drained from coal piles, and the other is the water washing coal conveying structures. According to meworological and hydrological data the drainage from the coal yard of Beilungang Power Plant is about 172,000 in per annum. This portion of waste water is formed mainly due to rain water carrying away with itself coal debris making SS index exceed the limitation set in the standard. The measures of disposing such waste water for Phase H are the same for Phase 1, that is, draining ditches are dug around the yard to drain all waste water (including the spraying water and rain water) into a sedimentation pond of the yard. Suspended solids will be settled naturally by gravity. When meeting the standard. the effluent will be discharged directly into the nearby sewers. If not meet the sandard, the effluent wiU be pumped to No2 Storage Pond, and treated together with irregular waste water (Category 2 waste water) The sediment is cleared by bucket type scavenger and unloaded at the coal yard. The flow chart is shown as Fig. 7. Washin water Wate collin basin Prmary settling:lank Scafing basin 1 Scwers Coal yard rain wa-er 2 sta Fig. 7 Coal Yard Drainage Treatment Process 17 4.2.5 Waste Water Containing Oil The coal-fired power plant produces less oily waste water. The oily waste water mainly comes from drainage of oil polluted spots, such as transformer spot, oil storage, etc. After the oil is separated from the waste water of this type, the effluent may meet the standard for discharging. If it fails to meet the requirements of the standard, it can be treated in recycle, or, delivered to the irregular waste water treatment system for further treatment. There has been an oil separating pond to treat oily waste water for Phase I Project, and waste water pump, waste oil pump and auxiliary equipment as well. The oil depot will be extended in Phase II. Conespondingly, an oil separating pond will be added to treat the oily waste water, and waste water pump and waste oil pump, etc. will be installed. Oily waste water treatment capacity is about 20 t/h. For the flow chart, see Fig. 8. Oily Wastwater Oil!wtspaaigpn Efletmnongod Dscuig Fig. 8 Oily Wastewater Treatment Process 4.2.6 Ash Water Existing monitor data show that trace metals and pH value of the ash water from power plants in Zhejiang Province which use Northern Shanxi coal as fuel can meet the national standards for discharging. Ash water amount of Phase I Project is around 475 t/h ( ash : water = 1: 4), that of Phase B about 713 t/h. 4.2.7 Domestic Sewage The domestic sewage of Phase I Project is about 470 t/d. After Phase II Project is completed, the personnel of the whole Plant will be increased by 380 persons or so. Assuming that one person consumes 200 liter per day, the sewage will be increased by 76 t/d; and the sewage from the staff and workers' residences, Yongfeng Village, will be transmitted into the Plant for treatment with an amount of about 100 t/d, totaled 176 /h. Consequently, one mechanically mixing aeration sedimentation tank will be 18 increased, including a water pond, booster pumps, water returr pumps. sterilization pool. etc. There will be three aeration sedimentation pond working under nosrnal conditions, and an additional standby for maintenance. 4.2.8 Recirculation Water The recirculation water of the Plant is directly cooled by the sea water from Jintang Watercourse. The recirculation water is, within the scope of the Plant, discharged into the seR area. Since Jintang Watercourse is a water way of tide, when entering the sea, the recirculation water will be mixed with the sea water pronply. which will not bring adverse effect to the water body. The total flow of the recirculation water of Phases I and 11 will be 110 M /s. Temperature- rise of the water discharged is 5 - 8 OC 4.3 Ash and Cinder Ash and cinder refer to solid waste produced in the preparatory process of coal and in the process of burning in the chamber ofa stove, which includes crushed-stone-coal discharged by a coal mill, cinder discharged by the chamber , ash from coal saver, ash from air pre-heating device, ash collected by the precipitators, etc. 4.3.1 Quantities of Ash and Cinder Discharged For the quantities, see Table 8. 4.3.2 Ash & Cinder Removal System Ash and cinder are removed separately, and one ash & cinder remcval system is installed for each 600 MW set. The cinder is collected into the cinder bucket(s) below the three cinder outfalls. A hydrological operated cinder flushing door and a cinder crushing machine are set at each cinder outfall. Under the action of cinder flushing nozzles, the cinder is flushed to the cinder crushing machine by gravity. A jet pump fixed at a cinder outfall flushes the cinder through a wear-resisting tube into an ash-pulp pond. and then the ash pulp is conveyed by an ash/cinder pump to an ash storage yard. 19 Table 8 Discharged Ash & Cinder Quantities Type Of coal Northern Shanxi Coal item th t/d 1000 t/a Cinder 32.6 717 211.9 Ash 294.0 6462 1911.0 Ash and Cinder 326.6 7192122.9 Note: The quantities of the ash and cinder are calculated on the basis that Northern Shmnxi coal consumption of 288.72 t/h per boiler with worst combined coal tye and maximum ash content is 22.6 %. A-coal-mill-discharged stone-like coal is flushed, by a hydrological jet pump controlled by a program, from a bucket collecting the stone-like coal through two wear-resisting tubes into the ash-pulp pond, and then the ash-pulp is conveyed to the ash storage yard. The flyash from the precipitators is collected into ash buckets, and then tiansmitted pneumatically into two dry-ash depots, one for coarse ash and the other for fine ash. At the bottom of the coarse ash depot there are two outfalls. Through one of the two outfalls, the ash goes out directly to vehicles; and the ash through the other is mixed with water added in an ash/water mixer, then discharged into the ash-pulp pond, and finally conveyed to the ash storage yard by an ash-pulp pump. Each ash and cinder removal system has three cinder pumps. The first one is for normal operation, the second is a standby for operation, and the third is a standby for maintenance. Each boiler is equipped with three low-pressure water and two high-pressure pumps. The water flushing pumps supply various kinds of nozzle pressure water demanded by jet pumps conveying cinder and stone-like coal, by hydrological jet pumps conveying the ash from the 20 coal economizers, and by the ash/water mixs convoying the flyash from the precipitatoss and water tight buckets storing cinder. 4.3.3 Flow Chart of Ash & Cinder Removal System The technological flow chart of the ash and cinder removal system is shown as Fig. 9. 4.3.4 Ash Yard The ash yard of Phase I Project is on the tideland between Suanshan and Bcilun Hill. It is close to the north part of the Plant. Ash transmission distance is 2.1 - 4 km. The initial elevation of the dike-dam for Phase I is 6.5 m (the ash will be piled up to 6.0 m). the final elevation will be 7.0 m The ash will be piled up to 6.5 m).The total theoretical storagc capacity is 8.50 million m . With a layer of mud left from construction, the acta capacity is 6.40 million m. Water adding Ce Cinder bucket beneath burner bottrom Cinder crunshing machinc Jet puMp Coa g omi ash Ash sroa l bucket ATpreheal ash yArd m iore bucket oarc a deos ()oAsh-pulF pond asdr W hpulp loadin truckadding watel Ahfar Preciiarflyash aAhsoaebce ieahdpt Bgigofahn Fig. 9 Ash and Cinder Removal System Techmological Flow Chart The ash yard mentioned -bove has two functions: (i) a long-tein as,h yard for the whole Plant; (ii) after Phase 11 ash yard is completed, it will be an emergency ash yard for the whole Plant. 21 It is decided for Phase II Ash Yard to adopt Niluoshan Ash Yard option, which will be located on a tideland by the East side of the Gangshan Reservoir of Zhenhai Petrochemical Complex. The tideland borders Waiyou Hill, Zhenhai. in the south, and Niluo Hill, Xiepu, in the north. The elevation (above the sea level at Wusong, the same below) of the tideland surface is between 0 and 3 in at present The tideland is very broad. The dike-dam of the ash yard will be built at the elevation of 0.5 m. The elevation of the dike-dam top is 7 in. The elevation of the breakwater is 9 m and that of ash pile 6.5 m. The length of the main dike-dam will be 5600 m, that of the dam for traffic 1300 m, and the area of the Yard 401.9 ba., while the storage capacity is 20.09 million n3. When the storage capacity is 42.45 million m?, the length of the main dike-dam will be 11600 m, the dam for traffic 2750 m, and the area of the Yard 862.7 ha. 4.4 Noise Sources 4.4.1 Noises of Machines Operation The noises refer to those produced by machine operation, vibration, friction and collision, which are mainly of low, intermediate frequencies. 4.4.2 Noises from Air Movement The noises refer to those caused by high prcssure airflow movement, steam expansion, steam throttled down, exhaustion, leakage in the pipes of the turbines, etc., which belong in low, intermediate and high frequencies 4.4.3 Combustion Noise It comes from fuel burning, gasification, and fume convection inside the boiler. It belongs in low and intermediate frequencies. 4.4.4 Electromagnetic Noise It refers to that produced by electric motors, exciters, tramsformers and other equipment due to magnetic fields alternation movements. Its frequencies mainly are low and intermediate. 4.4.5 Traffic Noise inside Boundary of Plant Generally, the noises made by runmng trucks. ships and buses and their horns and hooters are of high, intermediate and low frequencies. The noise of horns and hooters belongs in high frequency noise. 22 4.4.6 Other Noises They come from water power, water cooling, broadcasting. and human activities. Thy are mainly of intermediate and high frequencies. Among the above six types of noises, the environmental noises of the Plag come mainly from the cquipment with high-strength sound sources. 5 Air Envirenmental Impact Aassment 5.1 Pollution Meteorological Survey Two main protection objectives in the assessment on the air environmental impact of No.5 Set, Phase I Extension Project are Wuxiang and Baochuang (TreasurWed Colwnn), where Class I air environmental quality standard is enforced. The fume out of the chimneys of the Plant may affect these areas only when the wind is blowing by north. Pollution meteorological surveys were carried out during January 5 - 15 and February 1 -11, 1993. At two survey points, the Plant and Daqi. 7 km to the south of the Plant, the wind directions at the air boundary layer, wind speed and vertical distribution of temperature were probed. Air dispersion parameters were obtained by means of balanced sphere positioning. Especially, at the point of Daqi, a double-theodolite was specifically set for observing the balanced spheres, thus, the air dispersion parameters when the air currents flew over hills were obtained (See Fig. 10). Through observation it is seen that when the systematic wind was blowing by north, the wind speed could anunt to over 10 mis at the point in the Plant which is near the sea; when flowing to Daqi point obstructed by hill body, the air current rose and flew over the hil, the horizontal wind speed reduced. and the wind trended to change its drection from the north to the northwest. 5.2 Combination Form of Chimneys of Plant 5.2.1 One chimney for No.1 Set, with a height of 240 in and internal diameer of 7 m. 5.2.2 One chimney for No.2 Set, with a height of 240 m and intenal diameter of 7 m. 51.3 One grouped chimney for No.3, No.4 and No.5 Sets, with a height 240 in, and an eaternal concrete tube inside which there are 3 straight steel tubes with a diameter of 6.5 i. 23 Zbeh. FDulSe hIsumd DFBP - Bdufl~a SWind .g c~ t p w-hdr Fig. 10 Layout of Air Boundary Layer Probe Points*nevmmuf dum~amraluh of ilow m. d~c b~ two a~ co~ linu 50 fiL The quantities of the air pollutants exhausted by the chimneys and exhaustion parameters are tabulated as below. Item No. of Height Internal Tempera- Quantity Exhaust- Chimney of Diameter ture of of Fume ed Chimney (m) Fume (Nm/Is Quantity (m) (C) (t/h) SO2 Flyash Phase l 1 240 7.0 110 629 3.231 0.215 2 * 2 240 7.0 110 629 3.231 0.215 600MW I Phase II 3 240 3 * 6.5 110 3*629 3*3.231 300.215 + No.5 3 tubes (1887) (9.693) (0.675) Set grouped 5.3 Air Pollution Projection Model Wuxiang and Baochuang (Treasured Column), the two mjor protected objectives, are situated in mountain area. When the air currents coming from the Plant reach the area, the huge and high mounthin bodies make the currents flow over or bypass, change the directions and speeds of the curcnt fields, and also change the parameters of air dispersion. In order to give cnrrect expressions on the actual status of pollutants transmission and dispersion over the assessed area, it is indispensable to adopt the track fume-mass model which can describe the wind field variations along with space-time changing, and the air dispersion process that the air currents flow over or bypass the mountains as well. 5.4 Results of Projection by Model No-3, No.4 and No.5 Sets jointly will use one 3-tube combined chimney. The hot fume of the three boilers will join together, making the fume rising height 44 % higher than that of No.5 Set exhausted through a single chimncy, and 14.5 % higher than that of No.3 and No.4 Sets exhausted through a 2-tube combined chimney. Due to the fact that the effective height of the fume will be increased, although the exhaustion amount will be increased by 1/3 of (that of Phase II) by adding No.5 Set, on the contrary, the 25 concentration of the fume will be abated in the nearby area, and it increases less at long distance. On August 24, 1986, the wind directions were centralized at NEE, and the central area of high average concentration of S was crossing between Wuxiang and Baochuang. Wuxiang zone was outside the 0.005 mg/m iso-concentration line. The impact value of the Plant exhausted SO2 upon Wuxiang zone represented less than 10 % of Class I standard value of air environmental quality standard; and the value impact upon Baochuang zone was 0.01 - 0.02 mghn4, representing 20% - 40% of Class I standard value. On January 19, 1987, the high concentration center moved eastward to the west of Wuxiang zone with SO2 average concentration between 0.02 -0.03 mg/n, amounting for 40 % - 60 % of Class I standard value. The value of the impact upon Baochuang was less than 0.005 mg/m, amounting for below 10 % of Class I standard value (See Fig. 11). The SO2 concentration of the impact upon Wuxiang zone in the original EIAR on Phase I Project (2400 MW) was 0.035 mg/m3, 70% of Class I standard value. After the additional No.5 Set is put into operation, the maximum concentration of the impact will be 0.03 mg/n3. Thc reduction of the concentration is due to the effective height is increased by the grouped chimney. On February 7, 1993 the SO2 high average concentration area presented at the area east to Wuxiang, and Baochuang zone was not affected. The average concentration in Wuxiang zone was 0.02 mg/m3, representing 40 % of Class I standard value (See Fig 12). On January 6, 1993 the prevailing wind direction was northwest The fume of the Plant affected Chaiqiao and other areas. Wuxiang and Baochuang zones were not affected. In the smooth area southwest to Yapu, 0.10 mg/m3 high concentration center appeared, which represented 66.7 % of Class U standard value. 5.5 Finding The impact brought by Phase II Project after the extension of No.5 Set will be less than the impact of No.3 and No.4 Sets since the fume will be exhausted through the grouped chimney after the extension ofNo.5 Set 6 Assessment on Environmental Impact on Water Body 6.1 Content of Supplementary Work The principle of the water body environmental impact assessment work for the extension of No.5 Set for Phase H Project is to make best use of the results of the original environment 26 The elevations of the tenrain are "g mean values of I kmarea Distance between two a acent c ontour lines is 50 rn. .cotSo 1 1. 4 .o 41 . Fig. It Option 1: Each Chimney for No. I and No. 2 Sets; Jan. 19-20,1987 ,. Nos. 3, 4 and 5 Sets jointly use one 3-tube grouped 502 daily avere Chimney (5 * 600 MW) concentwaion (tmglm') Alif r BPP 9'Isimd BPP - BfUMPSg (nwmm) POwef PtA .D.qi R t.Jtan ., Februay 7, 1993 SOl daily average concentration (mg/n) The elevations of the terrain are mean values of I km2 area. Distance between two adjacent contour lines is 50 m. Fig. 12' Option 1: Eneb Chimney for No. I and No. 2 Sets; (5* 600 MW) Nos. 3, 4 and 5 Sets jointly use one 3-tube grouped chimney IL assessment on Phase II Project, therefore, the issues having been resolved are not repeated. The supplemcntary work is focused on the problems necessarily needing to be solved for the exDtsion No.5 Set To this end, the content of water body assessment involves these two aspects as below: (1)Iso-temperature(-rise) lines of the recirculation water after one 600 MW set is added to the 4 * 600 MW sets, when mean or small tide occurs, and the water areas enclosed by the lines. (2)Iso-temperature(-rise) lines of the recirculation water when the capacity of Zhenhai Power Plant, 1050 MW, is added to the capacity of 5 * 600 MW, and when mean or small tide occurs; and the water areas enclosed by the lines as well. 6.2 Method of Calculation The cooling water of Zhenbai Power Plant is extracted from and discharged into The Yongjiang River. The ratio of length to width of the Yongjiang River is much greater than that of Jintang Watrcourse, therefore one-dimension model is adopted for calculation. The cooling water of Beilungang Power Plant is discharged into Jintang Watercourse whose width is 3 - 7 lkn. So it is a two-dimension issue. Consequently, a one- and two-dimension coupled model is adoped to calculate the interaction between the two power plants. 6.3 Test and Verification on Flow Field and Pollutant Concentration Field The transmission and movement of pollution substances and heat entering the sea, their dispersions, tracks and staying durations are all dependent on correct modeling of the flow fields. Therefore the test and verification are an important key. The simultaneous observation data of the flow speeds and pollutant concentrations of the water areas adjacent to the two plants are comparatively complete: (1)Simultaneous observation data of water level, flow speed, pollutants adjacent to the estuary of the Yongjiang River obtained by the Estuarine and Coastal Engineering Institute on August 2 - 3, 1987, may be representative of the status of mean tide in summer; (2)A simultaneous observation was carried out near the very estuary by No. 2 National Oceanography Research Institute and other agencies during October 24 - November 3, 1988, may represent the status of neap tide. These data from the two observations are used to test and verify the one- and two-dimension coupled modeL 29 6.4 Determination of Computing Conditions and Groups Computation conditions include (i) selection of tide pattern; (ii) delermination of boundary value of the outer sea; and (iii) selection of effective water depth. For the layout of the computation points, see Fig. 13. The computation groups are arranged as: (1)When neap tide occurs, the flow of Beilungang Power Plant is 4 * 24 m3/s (when the capacity is 4 * 600 MW), and Zhenhai Power Plant is not generating power; (2)The flow of Beilungang Power Plant is 5 * 24 m3/s (when the capacity is 5 * 600 MW), and 2benhai Power Plant is not generating power; (3)The flow of Bcilungang Power Plant is 120 m3/s (when the capacity is 5 * 600 MW), that of Zhenhai Power Plant is 52 m3 ( when its capacity is 1350 MW). According to the calculation groups as defined above the computation is conducted by the hour. The main distributions of temperature rise can be seen in Fig. 14 and Fig. 15. 6.5 Findings 6.5.1 When the flow of the thermal water discharged by Beilungang Power Plant is 120 m3Is and that discharged by Zhenhai Power Plant 52 m3/s, the maximum areas with temperature rise of 4 OC, 3 oC and 2 OC arc 0.21, 1.26 and 2.43 km2 rcspectively. 6.5.2 The maximum temperature rise, at point A, due to the thermal water discharged by the 5 sets of Beilungang Power Plant is 0.88 OC higher than that due to the thermal water discharged by the 4 sets, and the mean temperature rise is 0.42 OC. And in the scope 1 - 2 km upstream and downstream to the outfall, the increase of the maximum temperature rise is 035 OC, and that of the mean temperature rise 0.16 - 0-18 OC. The increases of temperature rises at other points outside the scope are very limited. 6.5.3 In this assessment an effective depth sensitivity analysis is increased. When the effective depth changes 2 m, the maximum temperature rise near the outfall will vary by 0.82 *C, and the mean will vary by less than 0.32 OC. At the place less thaul km from the out fall the maximum will vary by only 0.18 *C or less, and the mean will vary by less than 0.12 oC. It can be seen from this finding that the effect of different selection of effective depths exerts only within a partial nearby scope. 30 Fig. 13 Layout of Representative Points A, B, C and Grepresent points near BPP E and F represent the points near ZPP N H, I and J represent the points far away from BPP or ZPP No Xiepu 0 .Jinang Island h hal ,V n l 2 it to 9 *-Power Plant*- Power Plant 7 6 31 ~ i..t intang Island 2E 4LI. ioodidefwheaidy C 3C 2°C .~t isla Tim fallndun P~3C ° Zp_ aD Q . 31 000 Xiip. ...aou ofn Te prtr- islan 33 - ''... ' 1.. 6.5.4 The contents and findings on the impact of organic pollution and the impact of the overflow from the ash dike-dam on pH value of the sea water are the same as those of the original water environmient assessment. 7 Assessment on Current Status and Impact of Enviromental Noise 7.1 Investigation and Assessment on Cunent Status of Noise In November, 1991, we conducted a field investigation on the existing noise sources and environmental noise in the Plant. Main findings are as follows: 7.1.1 Equipment Noise Assessment In actual monitoring, the total load of the generating sets was 320 MW, below the total installed capacity. However, it is proved by theory and the data actually monitored in Baoshan Steel Complex's self-owned power plant that there is no direct relationship between load of sets and strength of noise produced by them. It is seen from the results measured that the noise of Toshiba 600 MW set is a bit lower than that of 300 MW set made by local manufacturer. All the average noise levels of the turbines, generators and exciters are below or equal to the limitative value of noise required for main equipment of power plant So are those of the supporting equipment, coal mills and ash-pulp pumps. But the strengths of the broad frequency band noises generated by primary blowers and draught fans are about 10 dB(A) higher than the limitative values. 7.1.2 Workshop Noise Assessment The noises at 6 m and 12 m levels of the main workshop and at zero meter level in the boiler house are most serious in the workshop noises. The sound level values at the monitor points are all above 85 dB(A). It is because the strong sound-power sources are comparatively centralized in these workshops, as well as sound separating and absorbing facilities are not complete in these workshops. In the central control room, sound separating on-duty-rooms and the areas where the productive personnel frequently conduct activities, the requirements of the limitative values are met. 7.1.3 Plant-Area Envimonental Noise Assessment The noise sources of the whole Plant are mainly centralized in the areas with the centers of the main workshop and the boiler house. The noises bring greatest impact of noises upon the surroundings ae the air exhausting noises produced by dooxygenaters fixed at high elevation, supporting steam exhausting noise and noise of 4 blowers in the open area. During the monitoring stage, the Plant was under commissioning. The deaxygenaters were exhausting steam continuously. The sound level recorded at the place 20 m firom the steam 34 outfall was 102 dB(A), and that at productive office building 60 m from the outfall 98 dB(A). It can be seen from the monitored data at the boundary of the Plant that the impact of noise on non-productive area, where there is a hospital, a foeign experts building, residences for single persons and dining-room for workers and staff is small, meeting the requirement for domestic area. The noise of the Plant brings the greatest impact on Zhenhai Petrochemical Complex's domestic area at Suanshan Dock, about 500 m from the north side of the main workshop. The actually monitored data at the place I m outside the north enclosing waill is up to 71 - 75 dB(AI and those at the maximum sound receiving point in the domestic area at Suanshan dock are higher than 70 dB(A). The main noise source is the noise of steam exhausted frum the top of the main workshop to the right north direction. ZheDhai Petrochemical Complex once sent a letter to the Plant in 1991, requesting the noise pollution issue be solved as soon as possible. In the first quarter of 1992 the Plant treated the main steam exhausting noise actively. They installed silencers at the steam exhaust openings. and changed from northward to upward the direction of the opening facing right to the domestic area at Suanshan Dock. Consequently, quite obvious noise abatement effect was achieved. The field monitored data of the domestic area at Suanshan Dock shows that both the sound levels at daytime and nighttime are below 55 dB(A), meeting the standard for domestic area. The sound level in the productive office building near the fixed end of the main workshop is also abated to below 65 dB(A). 7.2 Noise Impact Projection Assessment In the noise environmental impact assessment , an " Application Software for Noise Impact Projection Assessment" was used in calculation. The main workshop of No.5 Set will be connected with the extension end of the main workshop of the original Phase II Project, whose architecture and structure will be analogous to those of Phase I Project. According to the projection calculation, after No.5 Set is put into operation, the noise value at the front area of the Plant will be increased by 5 dB(A) or so, that in the residences for single persons will exceed 55 dB(A). The noise value in the domestic area , Suanshan Dock, 500 m from the main workshop will remain unchanged, below 55 dB(A), meeting the noise standard for domestic area. The residential area of the workers and staff of the Plant is about I km from the main workshop. When the noise of the main workshop reaches the domestic area, it has attenuated to below the background sound-level value, within the limitative noise value of the standard for domestic area. The noise loudness contours are shown in Fig. 16. 35 ＇二＇一，―一－-－■•開■■■•■■■■■ ‘一 &,,－一一～一一－一－•．細．••，，馴”..，•• 36 口口口口口口口口口口•■■■•■ 7.3 Measures of Treatment In selection of main high noise equipment, it is required that marnActurers malm the noise of the equipmentnot exceed limitative values set forth in " Noise-Level ReqWrements for Main Equipnxw of Power Planr. As for the equipment which can not mad the raquiremerd in technology, silemm and sound sepicating facilities must be installed. For various air/ftam exhaust opwings which bring paw impact on the surroundings, silencers with comparatively ideal efficienc y should be installed, meanwhile it shall be considered fixuxg the openings to fitce the directions to wbich die noise impact on the surroundings is least. After No.5 Set is put into operation, souzzid level will mainly increase in the front am of the Pimt. Micrefom in design of the main worWiop the ratio of windows to walls and that of the windows opened to those closed should be reduced as much as possible. Furthermore, high- vunk broad leaf trecs shall be planted in front of the residences for single men and women. 8 Coal Dock Environmental Impact Assessment 8.1 Actual Monitor on Air Dust Pollution in Peripheral Area around Coal Dock In order to know the impact of the coal dock on the err ronrnent during November 16 - 19, 1991, 5 monitor points were set at the approach of the dock area, in the Plant area, the Beilum EngineaW Company and Oil Depot area, to monitor the concentration of dusL 71w accurate locations am shown in Fig. 17. Monitoring hours: 9:00 - 22:00. The results monitored are tabulated as Table 9. It can be seen from the monitored i ia that the dust concentrations are relatively high in the Dock Area which is about 50 m from the handling spot, beyond the allovable scope of national Class II standard, in which those of November 17 and IS -awe over two times that of national Class II shuidard value. It shows that the short distance impact of cod handling at the dock is law. and the concentration is ma-sed along with wind velocity incrcasm& As for other points, since they are fitrdier (all of tLeni we over 1000 in Wart) from the handling srat of the dock,the - - rations are low. Mr.-fare the handling mccrts very small impact on the places over I ODO in apart. I'he Engineering Company is about 200 m apart from the coal yard of Phase I Pm ect. During the monitoring period of Nov. 17 and 18, it was to the leeward of dw coal yard. But %c actually monibortmi concentration was not high, showing the impact of the coal was not great on fie area over 200 m apaxt 37 4n IA I -Ihes Pln cMnt v* Phaseco Ywd LJ.r qupnipiUmgyard Oil éO ladg~fibe Th~nu pawer Copn~ ~ 9iiiEgn~edaCm~P Fig.17 A Sketh of the Dock of Beilangang Power Plant Layout of Dest Mouitorig Points The dust concentiations in the Plant area were lowest. Because the Plant area was to the windwand of the coal yard during monitoring. 8.2 Coal Dock Environmental Impact Projection Assessment After the additional No.5 Set is extended for Phase II Project the annual fuel coal consumption will be increased approx. by 1.8 million ton per year. Thus The total fuel coal consumption of No.1 - No.5 Sets of the Plant will be 8.9 million ton. The unloading capacity of the dock designed for Phase I and original Phase II Projects is II million ton/a, fully meeting the coal demand of No.1 -No. 5 Sets. Since the calculation in the original environmental impact assessment was based on that the rated coal unloading capacity (11 million ton(a) of the dock, the originally calculated concentration of coal dust falling to the ground is still valid. Therefore the original finding on the coal dust impact can still be used. Table 9 Monitored Results of Dust Concentration (Daily Average Value, in mg/m) Date Meteo- Dock Sentry Engi- Oil plant rolo- -tion Area Box neer- Depot Area gical Condi g- Com- pany Prevail- Mean Cli- No.1 No.2 No3 No.4 No.5 ing wind wind mate dir. vel status (m/s) Nov. 16 N 2.6 fine 033 0.24 0.27 0.15 0.062 Nov. 17 NE 4.5 fine 0.79 0.26 0.20 0.25 0.17 Nov. 18 NE 3.8 fine 0.65 0.21 10.15 0.18 0.18 9. Environment Investment Environment Investment for Phase II Project is estimated as below (in million yuan): Electrostatic dedusting device 39 J-. (including civil works construction and equipment installation) approx. 90.0 Ash-pulp pumping station (ditto) approx. 5.6 Ash & cinder removal pipeline (ditto) approx. 106.0 Waste water treatment system (ditto) approx. 3.3 Chimney approx. 28.0 Ash dike approx. 80.0 Instruments for environment monitoring station approx. 1.0 Miscellaneous items, such as landscaping, dedusting of coal transmission dust, silencers.etc. approx. 1.0 Total investment of this Project approx. 6000 Environment investment of this Project approx 314.9 The environment investment for the 3 600 MW sets represents around 5.2 % of the total investment. 10. Major Assessment Findings 10.1 The 3-tube combined chimney option is feasible after No.5 Set is extended for Phase I Project. In Wuxiang and Baochuang areas, the surface concentrations of the exhausted pollutants meet national Class I standard for air environmental quality. 10.2 Under the conditions that the thermal water flow discharged by Beilungang Power Plant is 120 m /s and that by Zhenhai power Plant 52 m3/s, the maximum area with 4 "C temperature rise is 0.21 kmn2, that with 3 OC, 1.26 km2, and that with 2 oC, 2.43 km2. 10.3 After No.5 Set is put into operation, the noise value in the front area of the Plant will increase by 5 dB(A) or so; partial residences for single men and women will exceed 55 dB(A) at nighttime; the noise value in the domestic area at Suanshan Dock, about 500 in from the main workshop, will remain unchanged, below 55 dB(A), meeting the noise standard for domestic area. The residential area of the workers and staff of the Plant is about I km from the main workshop. When the noise of the main workshop reaches the domestic area, it has attenuated to below the background sound-level value, within the limitative noise value of the standard for domestic area. 10.4 Since the actual coal unloading quantity of the Plant's coal dock will be less than the unloading capacity of design after No.5 Set is added, the original findings of the coal dock environmental impact assessment of Phase U Project is still adopted. 10.5 To sum up, after Phase I Project is completed the extension with No.5 Set, all the pollution factors, such as fume pollutants exhausted, wastewater discharged, noise, etc. can 40 * 4* F ii ii il at o fl Zo -a 4 -~ - * [1 pr: 1' 5 1 5 ~1 0 -t r Attachment Document of State Environment Protection Bureau Huarian (1993] No. 134 A REPLY RE REVIEW AND APPROVAL OPINIONS ON ENVIRONMENTAL IMPACT ASSESSMENT REPORT FOR PHASE I PROJECT OF BEILUNGANG POWER PLANT Ministry of Energy Resource, Your Nengyuna Anbao (1992] No. 1166 Document received. Per consideration, now the review and approval opinions on EIAR for Phase II Project of Beilun Power Plant are put forward as follows: AAA. In principle, your minisiry's pre-review comments Is agreed. Under the prerequisite that various environment protection measu:es are well conducted. It is agreed to construct two 600 MW sets in Phase U of Beilungang Power Plant BBB. It is agreed that the two boilers will jointly use one 240 m high grouped chimney. CCC. The efficiency of the precipitators shall be checked in preliminary design in accordance with the national exhaustion standard. DDD. The waste water treatment options are agreed. Measures shall be adopted to raise the water reuse rate and abate the curl and suction effect of the thermal water of the Power Plant discharged at the intake of cooling water so as to reduce the impact on aquatic living things. EEE. Suflicient space for desulfation shall be reserved. FFF. Sulfate content of coal shall be strictly controlled below the index of the designed oal type. GGG. In the prelininary design, each of the environmental protection measures and the monitoring systems set forth in the ELAR shall be identified and fixed. HHH. " Three-meanwhile" System shall be enforced conscientiously. Please the environmeinil protection agencies of the province and municipality strengthen regular supervision and . management. State Environment Protection Bureau (seal) March 13, 1993 42