ENVIRONMENTAL IMPACT ASSESMENT - World Bank · TCVN Vietnam standard PC People’s Committee USD Dollar ... - Rainwater drainage: New construction of rainwater drainage sewer line

SOCIALIST REPUBLIC OF VIETNAM INDEPENDENCE-FREEDOM-HAPPINESS

BINH PHUOC PROVINCE PEOPLE’S COMMITTEE BINH PHUOC WATER SUPPLY AND DRAINAGE CO., LTD

WORLD BANK

URBAN WATER SUPPLY AND WASTEWATER IN VIETNAM - STAGE I

SUB-PROJECT: CONSTRUCTION OF DRAINAGE AND WASTEWATER TREATMENT SYSTEM IN DONG XOAI TOWN, BINH PHUOC PROVINCE

CAPACITY: 10.000 M³/DAY

ENVIRONMENTAL IMPACT ASSESMENT

Binh Phuoc Province, 2010 Han Minh Trading - Construction - Consulting Co.,Ltd

Pub

lic D

iscl

osur

e A

utho

rized

Pub

lic D

iscl

osur

e A

utho

rized

Pub

lic D

iscl

osur

e A

utho

rized

Pub

lic D

iscl

osur

e A

utho

rized

Pub

lic D

iscl

osur

e A

utho

rized

Pub

lic D

iscl

osur

e A

utho

rized

Pub

lic D

iscl

osur

e A

utho

rized

Pub

lic D

iscl

osur

e A

utho

rized

wb370910

Typewritten Text

E2609 v. 3

Project: Urban Water supply and Wastewater in Vietnam - Stage I Sub-project: Construction of Drainage and Wastewater Treatment in Dong Xoai Town, Binh Phuoc Province Environmental Impact Assesment Report

Han Minh Trading - Construction - Consulting Co.,Ltd Page i

TABLE OF CONTENTS I. EXECUTIVE SUMMARY ................................................................................................... 1 1. Overview ........................................................................................................................... 1 2. Purpose and feature of the EIA .......................................................................................... 1 3. Analysis of Alternatives ...................................................................................................... 1 4. Environment condition ....................................................................................................... 2 5. Socio-economi condition .................................................................................................... 3 6. Environmental impact assessment .................................................................................... 3 7. Environment management and monitoring program .......................................................... 4 8. Public Consultation ............................................................................................................ 4 9. Information Disclosure ....................................................................................................... 4

II. POLICY, LEGAL, AND ADMINISTRATIVE FRAMEWORK .............................................. 5 1. Vietnamese Law ................................................................................................................ 5 2. Environment standards of Vietnam .................................................................................... 6 3. WB .................................................................................................................................... 6

III. PROJECT DESCRIPTION ................................................................................................ 7 1. Overview ........................................................................................................................... 7 2. Project location .................................................................................................................. 8 3. Scope of the project ........................................................................................................... 8 4. Drain Basin Division .......................................................................................................... 8 5. Wastewater treatment plant ............................................................................................... 9 6. Total investment and capital source of the project ........................................................... 11

IV. ANALYSIS OF ALTERNATIVES .................................................................................... 11 1. Without the project ........................................................................................................... 11 2. With the proejct and option analysis ................................................................................ 12

V. ENVIRONMENT BASELINE ........................................................................................... 17 1. Natural conditions ............................................................................................................ 17 2. Socio-economic conditions .............................................................................................. 20 3. Status of the environment quality in the project area ....................................................... 24

VI. ENVIRONMENTAL IMPACT ASSESMENT .................................................................... 32 POSSITIVE IMPACT ....................................................................................................... 32 IMPOSSITIVE IMPACT.................................................................................................... 32 1. Period of preparing for investment ................................................................................... 32 2. The period of investment and construction ...................................................................... 39 3. Operation management period ........................................................................................ 49

ENVIRONMENTALTROUBLE ....................................................................................... 54 VII. ENVIRONMENTAL MANAGEMENT PLAN AND MONITORING ENVIRONMENT ........ 61 1. Environment management plan ....................................................................................... 61 2. Environmental Management Framework ......................................................................... 69 3. Environment monitoring program ..................................................................................... 70 4. General reporting and information for the EMP ............................................................... 77 5. Capacity building ............................................................................................................. 77

VIII. PUBLIC CONSULTATION .............................................................................................. 81 1. The necessity of the community consultancy ................................................................... 81 2. Purpose of the info propagation and community consultancy .......................................... 81


Han Minh Trading - Construction - Consulting Co.,Ltd Page ii

3. Specific content of community consultancy ...................................................................... 81 4. Results of community consultancy ................................................................................... 81

IX. INFORMATION DISCLOSURE ....................................................................................... 85 X. CONCLUSION ................................................................................................................. 85


Han Minh Trading - Construction - Consulting Co.,Ltd Page iii

ABBREVIATION PMU Project Management Unit MONRE Ministry of Resource and Environment EIA Environment impact assessment EMP Environment management plan EM Environment management ISMC Independent Safety Monitoring Consultant OP / BP Operating policies / Bank Procedure QCVN Vietnam Regulation TCVN Vietnam standard PC People’s Committee USD Dollar URENCO Urban Environmental Company VNĐ Vietnam Dong WB World Bank WWTP Wastewater treatment plant BOD5 Biological Oxide Demand (5 days) COD Chemical Oxide Demand TSS Total Suspended Solid


Han Minh Trading - Construction - Consulting Co.,Ltd Page 1

I. EXECUTIVE SUMMARY 1. Overview

The drainage and wastewater treatment construction project in Dong Xoai Town, Binh Phuoc Province is the completely private technological infrastructure for constructing rainwater drainage and domestic wastewater treatment system, in which is the domestic wastewater treatment plant with capacity 10.000 m³/day.

Project location Proejct location is at Dong Xoai Town, Binh Phuoc Province (see H-1 in Annex). The drainage line is located along current roads, domestic wastewater treatment plant at Tan Xuan Ward.

Work items of the project - Rainwater drainage: New construction of rainwater drainage sewer line D600-1.200

length 12.906 m. - Domestic wastewater drainage: Construction of domestic wastewater drainage lines by

pipes uPVC D200-400 length 69.490m. - Domestic wastewater treatment plant capacity 10.000 m³/day, including: Ditch for trash

rack installation, Horizontal sand sedimentation tank, Anaerobic biological lake, Casual biological lake, Antiseptic tank, Chemical house, control room and auxiliary works..

- Domestic wastewater is treated in compliance with QCVN 14:2008/BTNMT - Column B, before discharging into receiver source Dakrip stream.

Total investment: 387.689.400.000 VNĐ - equivalent 19.098.000 USD Capital Source: World Bank (69,54%)) and counterpart fund from Vietnam (30,46%).

2. Purpose and feature of the EIA The purpose of the EIA is to identify and predict the environmental and social impacts direct, indirect and can potentially cause by the project and proposed mitigation measures to ensure sustainable development of the project EIA addresses the issues necessary for the appraisal of the WB, including environmental impact assessment (EIA) and construction environmental management plan (EMP) complies with the procedures and operational policies OP / BP 4.01 of the World Bank, identifies mitigation measures to minimize the impact caused by the project, providing the results of public consultation done by the WB’s BP 17.05 The main environmental issues of the project related to impacts on surface water quality, hydrology, groundwater quality, air quality; heavy metals in soil, solid waste and other impacts such as landslides and land subsidence, natural biodiversity. Main social problems of the project involves the construction site clearance for processing plant and entrance on land acquisition out of 59 households, of which 9 households have resettled; daily life, business of households, the traffic situation, the people's travel, urban landscape construction on sewage lines, security and order local area neighboring the camp Human; economic benefits from the projects back households.

3. Analysis of Alternatives This project brings enormous benefits to the environment, contributing to the socio-economic development in Dong Xoai Town, as well as Binh Phuoc Province through the resolution of flooding, storm water drainage, and collection and processing urban waste water The drainage system was selected as its own drainage system in line with urban which is not completed with drainage system, as well as unique natural, economic, social and local conditions, Source of investment. Drainage basin was calculated, divided into four basins based on the current status of natural storm water drainage, water distribution lines and natural terrain elevation of the drainage area. On that basis, the layout of the storm drain lines, drainage waste water pipeline along existing roads



Numbers of waste water pumping stations are five stations, were calculated, based on the selected drainage basins and the depth of buried pipes to ensure the pumping stations are not placed too deep, the minimum number and optimal water pumping wastewater treatment plant. Wastewater treatment technology is selected on the basis of optimal plans based on input wastewater quality, wastewater quality output discharged into receiving Source Location for waste water treatment plant is selected on the basis of optimizing the position can be as far from the factory to the nearest residential area 300 meters, located at the end of the monsoon, almost no requirements to receiving Source for high quality surface water for living purposes, consistent with the planning, subjects affected by land clearance and resettlement is the smallest.

4. Environment condition Climate Binh Phuoc’s climate has the character of tropical monsoon that divides separately into 2 seasons. 90% the rainfall volume of the year. Both the operational regime of the drainage system in the operation stage, work construction task in the construction stage are under affection of this climate regime.

Geology Dong Xoai Town is in the terrain of low hill and lowland, undulating, reducing the high volume from North to South, changing from 75.0-100.0 m, having many little springs and flumes.

Work Geology Ground layer at the construction area is the Basaltic clay layer, brown-red, firm and ductile, convenient for the construction.

Hydrology Dakrip is the receiver source of treated water from the water treatment plant. The width of the spring is tight at the upstream and is expanding gradually to the dwonstream; along the banks luxuriantly grown plants, weeds obstructing the current. At the plant construction location, the spring is about 6m wide, 2m deep incomparison the the bank; capacity in the flood season is about 11.55 m³/s with the depth of the water level is 1,5m; dry season capacity is 1,47 m³/s with the depth of the water level is 1m.

Noise and air quality The result of measurement, analysis of air samples in the project area and comparison to National Technological Standard for surrounding air quality (QCVN 05:2009/BTNMT) shows that the air quality stays within the acceptable limit. The result of measurement, analysis of noise level in the project area and comparison to National Technological Standard in residential, public area (TCVN 5949:4998) shows that the noise level stays within the acceptable limit

Surface water quality The result of measurement, analysis of spring’s and lake’s water samples in the project area and comparison to National Technological Standard (QCVN 08:2008/BTNMT) shows that the surfacewater of springs has signs of pollution by Norm BOD5, COD, suspended solid, Florua and not fit for irrigation, maritime breeding and domestic use; in which, is Dakrip. Currently, the surface water got polluted by domestic wastewater of people discharged to these springs.

Undergroundwater quality The result of measurement, analysis of water samples at specific points of the construction in the project area and comparison to National Technological Standard (QCVN 09:2008/BTNMT) shows that the undergroundwater quailty stays within the acceptable limit.



Domestic wastewater quality Fromthe survey, analysis result of domestic wastewater at centralized discharging point, households, manholes in the project area and comparison to National Technological Standard for domestic wastewater (QCVN 14:2008/BTNMT) shows that the domestic wastewater has Norms such as BOD5, Coliform exceed the limit. Domestic wastewater needs to be collected and treated in compliance with QCVN 14:2008/BTNMT - Column B before discharging.

Heavy metals in soil Roll out the collection, analysis of soil samples at the specific points of the project area and comparison to National Technological Standard regarding accpetable limits for heavy metals in soil (QCVN 03:2008/BTNMT) shows that they heavy metals components in soils stay within the limit.

5. Socio-economi condition Population Dong Xoai Town includes 05 wards and 03 communes, according to the statistical data of the TPC in the Year of 2009, the population growth rate is 2.87%, in which: natural growth rate is: 1.47% and mechanical rate is: 1.4%. According to the statistical data, the population of Dong Xoai Town as in Expansion Planning is 100,720 people (Year 2009); estimate to Year 2020 is133,655 people.. The affected households by land acquisition for wastewater treatment plant construction and entrance route are 59 households, in which, are 9 resettlment households.

Ethnic Kinh Ethinic is the major component of the project area; besides, there are ethnic groups as follows: Tày, Thái, Hoa, Khmer, Mường, Nùng, Giao, Chăm, Mnông, Xtiêng,... according to the statistical data of the Ethnic and Religion Desk of the Province in 2006,, Dong Xoai Town has 977 households of ethnic groups. The land acquisition and resettlement of the project do not affect those groups.

Drainage and submergance status Dong Xoai Town locates on the slopy area, with springs and lake, facilating for natural drain. Drainage line (the rainwater drainage sewer line with domestic wastewater to the manholes) is not invested properly, has been built according to the progress of routes construction so the drainage altitudes are not synchronous, results in partial submergence at 2 point as follows: - 1st point: intersection of NR14 and Phu Rieng Do Road, submerged area about 3.1 ha,

affected households around 158 households. - 2nd point: alley next to Tân Hoàng Long Company, from NR14 long to Phú Riềng Đỏ,

submerged area about 6.4 ha, affected households around 422 households. The project will invest and construct the private drainage system, solve the submergence, drain rainwater, collect and treat domestic wastewater.

Communication Accoring to the socio-economic survey, 99% of the households owns TVs facilitating project info propaganda to the community.

6. Environmental impact assessment Any purpose of any impact, both environmentally and socio-economically is to identify and predict all the impact that may occur when implementing the project, thus, given the measures of eliminating or minimizing necessarily for their impact to the project area is the smallest. The most importantly potential impacts of the projects are summarized as follows:



Investment preparation stage Issue: land acquisition and resettlement. Impact: change in community structure, life activities, families’ income. Mitigation measures: Select the plant construction area at the sparse residential area, propagate and encourage people, implement adequately the policies on land acquisition and resetttlement. Study of supplementary impacts: impact analysis and mitigation are solved more in the resettlement compensation plan.

Construction stage Issue: construction of the drainage line. Impact: landscape, urban transportation; income of business households. Mitigation measures: implement reasonably, at schedule; traffic distribution, people propaganda. Issue: construction of the wastewater treatment plant. Impact: solid waste from the construction leftovers, residual land of foundation pit; grabage. Mitigation measures: contact the construction leftovers, residual land of foundation pits receivers.

Operation stage Issue: operation of the wastewater treatment plant. Impact: bad odor in the domestic wastewater; amount of biomass sludge. Mitigation measures: The location of the plant is away from the residential area, spray odor killer to the wastewater, equip mask for operating worker; contact te profesional units to dredge, process periodically the biomass sludge. Issue: manhole dredge, pumping wash the rainwater drainage sewer, wastewater drainage sewer. Impact: odor, sludge. Mitigation measures: inform publicly the action plan, organize to dredge, pumping wash rationally, equip mask for workers, srpay antiseptic to eliminate the odor, contact frofessional unti to treat the sludge.

7. Environment management and monitoring program The objective of the enviroment quality monitoring program in waste water treatment plant of Dong Xoai Town, Binh Phuoc Province is the continuous monitoring info on environment quality morphs by the activities of the treatment plant in order to timely discover negative impacts to the environment and propose prevention, mitigation measures the pollution. In addition, the environment quality monitoring also ensure the safe operation for the wase water treatment plant. To ensure the assessment of environmental and social Impact be effective, the implementation unit and project management agencies need to comply with the management and environmental monitoring program that has been proposed Implementing organs: PMU (Binh Phuoc WS&D Co.,Ltd), Consulting Contractor , Construction contractor. Monitoring organs: Department of Resource and Environment of Binh Phuoc Province, Department of Resource and Environment of Dong Xoai Town, World Bank (WB), community and the internal monitor of the implementing unit.

8. Public Consultation Public consultation of the project was done in two times, including answering questions in the socio-economic survey public consultation.



Scocio-economic survey to households (interview- answer the questionaires) from June 22 2010 to July 5 2010, the questionaires contain 56 questions, total of interviewed households is 1.272 households. (acounting for 5% of the total households) Public consultation meeting on October 4, 2010 at implementation meeting room of Dong Xoai TPC with the present of representative of households whose lands were reclaimed for the wastewater plant and entrance, and the representative of the local government.

Public consultation result Percentage of households who want the project to early implement and put into use for them to be connected to wastewater systems accounts for 94,3%. People of all households as well as local authorities attended public consultation meetings were agreed, households support the project; implement as rolling method, not to prolong cause loss of landscape and environmental pollution.

9. Information Disclosure The guideline for drainage and wastewater treatment system in Dong Xoai Town project establishment is posted publicly on website:. Both important meetings regarding project implementation, report of project components are broadcasted by the BTV and BR and posted online on website: http://www.bptv.com.vn. Scocio-economic survey, community consultation were carried out in order to propagate info to the community. Info about resettlement compensation plan is posted on the APB of the communes’, wards’ PCs. During the construction stage, at the site is the public info table contains: name of the project, name of the package, employer, design consultant contractor, construction contractor, monitoring consultant contractor, total investment, capital etc. In compliance with the WB regulations, the final EIA will be displayed at the Centre of Development Info of Vietnam at Hanoi and Infoshop at Washington DC.

II. POLICY, LEGAL, AND ADMINISTRATIVE FRAMEWORK 1. Vietnamese Law

Legal framework and regulation regarding environment of Vietnam recently have been implemented on board scale and inculde: - Environment Protection Law 52/2005/QH11 approved by Socialist Republic of Vietnam

on November 29 2005. - Water resource law approved by Congress of Socialist Republic of Veitnam on Term X,

session 3 on May 20 1998. - Fire protection and prevention approved by Congress of Socialist Republic of Veitnam

on TermX, session 9 on une 29 2001 and officially valid from October 04 2001. - Decree No. 80/2006/NĐ-CP dated August 9 2006 of the GOV regarding detail

regulations on instruction for implementation of articles of Envrionment Protection Law. - Decree No.21/2008/NĐ-CP dated Frebuary 28 2008 of the GOV regarding amendment

some articldes of the Decree 80/2006/NĐ-CP dated August 9 2006 09/08/2006 of the GOV regarding detail regulations on instruction for implementation of articles of Envrionment Protection Law.

- Decree No. 88/2007/NĐ-CP dated May 28 2007 regarding urban drainage and industrial zone.

- Decree No. 59/2007/NĐ-CP dated April 9 2007 of the GOV regarding solid waste management .

- Circular No.13/2007/TT- BXD dated December 31 2007 of the Minsitry of Construction instructing some articles of Decree 59/2007/NĐ-CP dated April 9 2007 of the GOV regarding solid waste management.

- Circular No.02/2005/TT-BTNMT dated June 24 2005 of the MORE instructing implementation Decree No. 149/2004/NĐ-CP dated July 27 2004 of the GOV regulating the grant to probe, exploit, use water resource, discharge wastewater into water source.



- Decision No.22/2006/QĐ-BTNMT dated December 18 2006 of the MORE regarding enforce application of VN environment standards.

- Decisions No. 23/2006/ QĐ-BTNMT dated December 26 2006 regarding issue list of dangerous waste.

- Circular No.05/2008/TT-BTNMT dated December 8 2008 of the MORE regarding strategical environment assessment, assessment of environment impact and commitment in envrionment protection.

- Circular No.04/2008/TT-BTNMT dated September 18 2008 of the MORE regarding the instruction for construction and approval hoặc confirmation the environment protection project and check the implementation of the environment protection projects.

- Joint Circular No. 45/2010/TTLT-BTC-TNMT dated March 30 2010 of the MOF – MORE instructing expense managment for environment work.

- Circular No. 83/2002/TT-BTC dated September 25 2002 of the MOF regulating the regime of collecting, submitting and expenses, charges management for quality mesurement standard.

2. Environment standards of Vietnam - QCVN 08:2008/BTNMT - National Technological Standard about the quality of surface

water. - QCVN 09:2008/BTNMT - National Technological Standard about the quality of

underground water. - QCVN 14:2008/BTNMT - National Technological Standard about the domestic

wastewater. - QCVN 05:2009/BTNMT - National Technological Standard about the quality of

surrounding air. - QCVN 06:2009/BTNMT - National Technological Standard about some poisonous

substances in the surrounding air. - QCVN 07:2009/BTNMT - National Technological Standard about the thresold of

dangerous waste. - QCVN 03:2008/BTNMT - National Technological Standard about limit of heavy metals

in soil. - TCVN 7222:2002 – General demand about the environment to centralized wastewater

treatment plant. - TCVN 5949:1998 - Accoustics – Noise in public area, residential area, limited maximum

level. p - TCVN 6962:2001 – Vribation and Quake – Vribation from construction and industrial

manufacture – Max limited level to public environment and residential area. - TCVN 3985:1999 – Limited noise level at workplace (industrial manufacture).

3. WB - Environmental Assessment – Procedure/ Regulations (OP/BP 4.01) - Natural Habitat (OP 4.04) - Cultural Resources (OP 4.11) - Public Consultation (BP 17.05) - Forest (OP/BP 4.36) - Information Disclosure (OP/BP 17.50). Environment assessment OP/BP 4.01: in operational policies of the WB, the purpose of environment assessment is to enhance to decision making, ensure the options of the considering project are sustainable and righteous; for the PAP to be possibly consulted. To meet this goal, the policies of the WB have outlined procedures to: - Identify the risk of the enviroment generally, relating to the project.. - Assess the environment impact, the possible threats and the way those impacts to be

mitigated to the acceptable level( environment management and evaluation).



- Ensure the viewpoint of possible PAPs reflect righteously in identification environment risk and impact management (community consultancy).

- Ensure the implemented process during the impact assessment is released aequately and transparently to the whole community for in-depth knowledge. (info realse).

- Measure for implementation and monitoring of relating commitments to discoveries and proposals about the environment assessment (environment managment plan)

Community consultancy and info realse are essential factors in environment assessment policy of the WB. Natural habitat OP/BP 4.04: Safety policy of natural habitat is to ensure that supportive infrastructure and development projects of the World Bank notice to the consideration of biodiversity conservation, as well as numerous environmental services and products from the natural habitat provides to the society and human. This policy rigorously limits cases can cause damage to the natural environment (soil and water, where are most of the animals and trees in the locality) of the grant project funded by WB capital. In particular, this policy prohibits the World Bank support for projects which can cause major losses or major depressions for any important natural habitat, including legally protected areas, proposed to be protected or not protected officially, but have high conservation value. Natural habitat is defined as land and water, where populations of organisms are shaped by animals and plants, and activities of the human does not fundamentally change the ecology activities of the area Cultural assets OP/BP 4.11: The objective of this policy is to avoid or mitigate adverse Impact on the cultural Source from the development projects financed by the WB. The Source of cultural objects, including objects move or not move, space, infrastructure, work groups, natural features and scenic significance in terms of archeology, ethnology, architecture, religion, aesthetic and other cultural meaning. Besides the survey prior to construction, the findings "accidental" or "accidental discovery" of archaeology or other important meaningful work to the cultural heritage of Vietnam may not be examined. Forest OP/BP 4.36: World Bank's policy is to reduce deforestation, enhance environmental contribution of forested areas, promote forestation, reduce poverty and encourage economic development. Forestry Strategy suggests three pillars of equal importance and interdependence that guide the Bank to participate in forest operations in the future: exploring the potential of forests to reduce poverty; put forest into sustainable economic development and protect the important value of forest environmental services. This project only use OP/BP 4.01.

III. PROJECT DESCRIPTION 1. Overview

Name: Construction of drainage and wastewater treatment system at Dong Xoai Town, Binh Phuoc Province; capacity 10.000 m³/day.

Governing Body: Binh Phuoc Province People’s Committee Employer: Binh Phước Water Supply-Drainage Co,.Ltd.. Project Consultant: Han Minh Trade, Construction & Consultant Co., Ltd.

Method of management and implementation: The employer directly manage and implement the project.. Operational Management Unit: Binh Phước Water Supply-Drainage Co,.Ltd

Goal of the project - Improve urban environmental conditions in Dong Xoai Town, through the construction

of drainage works, wastewater treatment and increase public awareness about health and hygiene through education and community relations

- To enhance the durability of infrastructure and urban services in Binh Phuoc Province by supporting the drainage system management and operation Unit, propose relevant



mechanism of operation as well as assistance in terms of techniques in the management of drainage system operation and environmental sanitation

The drainage and wastewater treatment construction project in Dong Xoai Town, Binh Phuoc Province is the completely private technological infrastructure for constructing rainwater drainage and domestic wastewater treatment system, in which is the domestic wastewater treatment plant with capacity 10.000 m³/day Connection households (beneficiaries) expect in the year the plant is put into use (2017) to be: hosueholds and the year the plant fully works (2020) to be: households. The households are directly affected by the drainage lines construction in the construction stage are: hosueholds.. The affected households by land acquisition for wastewater treatment plant construction and entrance route are 59 households, in which, are 9 resettlment households.

2. Project location The project location is at Dong Xoai Town, Binh Phuoc Province (H-1 in appendix). The drainage sewer line is located along existing routes Tan Xuan Ward, construction area 8,23 ha.

3. Scope of the project Study scope of the project includes urban area and Expansion Planning scope of Dogn Xoai Town: - Central area: Ward Tan Xuan, Tân Thiện, Tân Bình, Tân Phú, Tân Đồng and

communes Tiến Thành, Tiến Hưng, Tân Thành. - Expansion scope: Communes: Thuan Phú , Đồng Tiến, Tân Phước, Tân Hưng. Stage I to 2020: the project will study on the scope of central area of Dong Xoai Town includes wards: Tân Xuân, Tân Thiện, Tân Bình, Tân Phú, Tân Đồng and communesTiến Thành, Tiến Hưng, Tân Thành. Area of the study in sategeI is over 1.600 ha with total beneficiaries is 133.655 People.

4. Drain Basin Division Rainwater catch basin There are 04 basins as follows:

Basin1 A part of Tan Binh Ward and a part of Tien Thanh Commune. This Basin exits to Cam Spring. Range of the basin: - Border with Cam Srping on the North - Bordered by Ton Duc Thang Street on the South - Bordered by Nguyen Binh Street on the East - Bordered by Hai Thuong Lang Ong Street on the West.

Basin2 A part of Tan Binh Ward and a part of Tien Thanh Commune. This Basin exits to Cam Spring and Cam Spring Lake. Range of the basin: - Border with Cam Srping Lake on the North - Border with NR14 on the South - Bordered by Nguyen Binh Street on the East - Bordered by Tran Phu Street on the West.

Basin3 A part of Tan Binh Ward and a part of Tien Thanh Commune. This Basin exits to Cam Spring and Dong Tien Spring. Range of the basin: - Border with Cam Srping Lake on the North - Border with Cam Spring Lake and Tran Phu Road - Bordered by NR on the East - Bordered by belt line on the West.



Basin4 A part of Tan Thien Ward, a part of Tan Binh Ward and a part of Tan Xuan Ward. This Basin exits to Dong Tien Spring and Rat Spring. Range of the basin: - Borderd by NR 14 on the North - Bordered by DT741 on the West - Bordered by the belt line on the West And East.

Table 3-1. Total volume of rainwater drainage

No Work item Unit Volume 1 New construction of sewer lineD600 m 4.050 2 New construction of sewer lineD800 m 6.595 3 New construction of sewer lineD1000 m 1.505 4 New construction of sewer lineD1200 m 756 5 New construction of ditch 600 x 800 m 490 6 New construction test pit, absorption pit piece 327 7 New construction sewage discharge gate D800 piece 01 8 Replacement for damaged manhole cap piece 312 9 Dredging 800m Dong Tien Spring (upper ream) m³ 2.400

Wastewater catch basin division 04 basins as follows:

Basin1: 400 ha, a part of Tan Phu Ward and a part of Tien Thanh Commune.

Basin2: 120 ha, a part of Tan Phu Ward.

Basin3: 140 ha, a part of Tan Phu Ward.

Basin4: 1.000 ha, a part of Tan Phu Ward, Tân Đồng, Tân Thiện, a part of Tan Binh Ward a part of Tan Xuan Ward.

Table 3-2. Total volume of wastewater drainage

No Material-Format Unit Volume 1 Pipe HDPE DN200 m 38.998 2 Pipe HDPE DN300 m 11.264 3 Pipe HDPE DN400 m 3.912 4 Manhole A x B=1200 x1200 piece 1.265

Table 3-3. Total of wastewater pumping station

WPS Capacity(m³/h) Area (m²) Qo. Pump WPS No.1 25 (m3/h) 3,6 x 1,9m = 6,84 01 working

01 standby WPS No.2 65 (m3/h) 4,9 x 2,6m = 12,74 01 working




01 standby

5. Wastewater treatment plant - Capacity: 10,000 m³/day.



- Construction area: 8.23 ha. - Location: farming land slot next to Dakrip of Tan Xuan Ward, Dong Xoai Town, Binh

Phuoc Province - Water quality after treatment: qualifies QCVN 14:2008/BTNMT - Column B, receiver

source is Dakrip.

Treatment process line

Process line description Waste water from the pumping station is transferred to receiving shell; install trash rack paralelly in the receiving shell to remove coarse waste: packaging, the twigs, leaves, animal bones from wastewater. Then the wastewater is brought into vertical sand sedimentation. Here the type of sediment gravity such as sand, gravel, metal fragments, ... will be settled by means of centrifugal and gravity. Waste water continues to be introduced into anaerobic lake, casual lake and stabilization tank. Wastewater will be treated by methods of natural biochemical. Anaerobic bacteria consume organic matter, sediment from the dredging of the lake will be carried away for burial. By biochemical methods using natural retention time in the lake so long after the wastewater through the application process quite well, but water quality is not stable depending on the waste water input and the season. Raw trash salvaged from trash rack will be collected and definitely transported to landfills. Sand from sedimentation tank is separated from wastewater by the separator, then collected and transported to sanitary landfills.

Work items Ditch fot trash rack installation: 01 Manual Trash rack installation: Distance between bars 16mm; Ditch dimensions L x B x H = 12m x 1m x 2m; Trash rack dimensions B x H = 1m x 2,3m, inclined 60, 02 Trash bins, capacity 500 litre.

Horizontal sand sedimentation tank: Includes 02 tanks : Max wastewater capacity Q = 10.000 (m³/day); Particle sized sand sedimentation d = 0,25mm; sand rake installed next to tank bottom, dimensions of each tank : L x B x H = 10m x 4m x 2,4m.

Anaerocbic lake: Includes 02 lakes : Dimensions of each L x B x H = 90m x 44m x 3,5m; Lake is built by rubble, coverd by water-proof membrane HDPE.

WASTEWATER PUMPING STATION NO.5

DITCH INSTALLED WITH TRASH RACK

HORIZONTAL SAND SEDIMENTATION TANK

ANAEROBIC TANK

CASUAL BIOLOGICAL TANK

DISINFECT TANK

DA SPRING(DAK RIP SPRING)

TO DISPOSAL AREA TRASH DISPOSAL

SEDIMENTATED SAND

SLUDGE DREDGE

SLUDGE DREDGE

TO LANDFILL



Casual bicochemical lake Includes 02 lakes : Total surface area of 02 lakes 30.000m²; Lake 1 area 14.000 m² Lake 2 area 16.000 m²; Lake is built by rubble, coverd by water-proof membrane HDPE. Antiseptic tank: Calculation capacity q = 417(m³/h); Contact time 30 (minute); Necessary capacity of Contact tank W = Q x t/60 = 208,35m³. Contact tank Clo dimensions L x B x H = 10,8m x 10m x 3,0m; Working height hct = 2,0m; Including 06 bulkhead compartment mixing model zich Zac.

Chemical house: content of activated Clo a = 5 (g/m3). Using Clo powder. Clo powder is mixed in 02 tanks, after the mixing Clo is fed into disinfect tank. 02 metering pumps with specifications Q = 6m3/h, H = 15m, N = 1,5 kW.

Discharging gate: at Dakrip, steel reinforced structure, Average discharging speed 0,116 m³/s.

6. Total investment and capital source of the project Total investment

Table 3-4. Total investment

No Items Value (1.000 VNĐ) 1 Rainwater drainage system 90.734.899

2 Wastewater collecting sewer and man holes 144.576.642

3 Wastewater pumping station 4.717.234

4 Wastewater treatment plant, capacity 10.000m³/day 54.790.933

5 Household connections 17.849.366

6 support for operation and management (treatment station, pumping station and drainage sewer network ) 3.915.800

7 Indirect investment cost 35.859.987

8 Contingencies (10%) 35.244.500

9 Total 387.689.400

Capital structure Table 3-5. Capital structure

No Implementing capital source Preferrential credit loan of WB

Counter part fund

1 Value (1.000 VNĐ) 269.584.200 118.105.100

2 Exchange USD 13.280.000 5.818.000

3 Ratio % 69,54% 30,46%

IV. ANALYSIS OF ALTERNATIVES 1. Without the project

Drainage line (the rainwater drainage sewer line with domestic wastewater to the manholes) is not invested properly, has been built according to the progress of routes construction so the drainage altitudes are not synchronous, results in partial submergence at 02 point as follows: - 1st point: intersection of NR14 and Phu Rieng Do Road, submerged area about 3.1 ha,

affected households around 158 households. - 2nd point: alley next to Tân Hoàng Long Company, from NR14 long to Phú Riềng Đỏ,

submerged area about 6.4 ha, affected households around 422 households.



Dong Tien Spring run across Dong Xoai Town, is the rainwater receiver and dranage. The Up-tream is 800m long, cross section of the flown is reduced by waste of people living along the spring; plants and weeds without being reclaimed so the drainage capability of this section is congested, results in submergence to people here whenever come heavy rains. The current calculated domestic wastewater volume is 4.800 m³/day without being collected and treated but discharged directly to rainwater drainage sewer, causing the pollution of the surface water environment, odor in the air. Along with the socio-economic growth-rate, the wastewater volume will increase to 10.000 m³/day by the year of 2020. Urban domestic wastewater is not collected and treated typically before discharging to environment will cause more severe pollution, affect peoplse’ health, constrain the socio-economic growth-rate. If the project: construction of drainage and wastewater treatment system in Dong Xoai Town isn’t implemented, the submergence in the area will prolong and generate other submergence points when expanding the traffic routes to develop the town. The results of it in the future will be very immense and unpredictable; thus, lead to consequences in socio-economic restrain, population and social security, tourism and investment attraction etc

2. With the proejct and option analysis This is the environment treatment project, in particular, the project will invest in construction of the private drainage system, solve the submergence, drain rainwater, collect and treat domestic wastewater.

Selection of type of drainage Lựa chọn loại hình thoát nước

Table 4-1. Comparison of types of drainage system Advantages

Common drainage system Private drainage systems Sewerage system is separate wells and sewer wastewater

collection Exploit the system operating in both dry and rainy seasons. The smallest of the three funding schemes. Because rainfall is very large compared to wastewater, sewage systems only need to build networks for storm water drainage plan as its own is sufficient. Large volume of water drainage culvert large diameter, small slope, depth put down drains, culverts short. Manage simple.

Ensure the best hygiene. Wastewater collection and treatment to thoroughly clean environment brings to the city. The drainage system was scientific organizations, rain water, waste water is very convenient to separate the anti-flood work, handling and environmental protection. Compliance with the new urban, urban investment has not been built drainage system does.

For the region is (center) is the current situation remained thus reducing the cost of new investment. Limit the volume of destruction in training center. Do not pollute the environment by construction excavation work caused. Very suitable for urban areas need improvement and upgrading of drainage networks. Especially suitable conditions for the initial capital investment that requires not more environmentally demanding. In terms of hygiene is relatively good because of all waste water is cleaned (wet and dry season and when small) or be diluted with rain water (as rainfall) before emptying into rivers and canals. Collect the first wave of rain (10 - 20 minutes of rain). Take advantage of the general sewer system status. Initial construction costs are



not large. Reduced clearance compensation costs.

Disadvantages Common drainage system Private drainage systems Sewerage system is separate

wells and sewer wastewater collection

Biggest drawback of this plan is not to collect and process waste water, causing serious environmental pollution. If you have collected about the handling capacity of the treatment plant will lead to huge costs of construction are very large, non-economic and feasibility. The working regime of instability, the dry season due to a small volume of waste water, small water velocity sediments prone, clogged drains. Should be regularly dredged and widened.

Cost of initial investment in building large networks has to build two completely separate drainages. Dry season rain water drainage network activity should not cause waste. Dirty little water flow (about 0.5 l / s.ha), small diameter sewers, culverts placed large slope, depth of large sewers, pump stations have many transitions. Do not get rain the first phase (5-10 minutes by rain.) Managing complex because there are two drainage networks.

The interceptor sewers separate dirty water from the wells to the treatment plant must be placed quite deep, because at the end of main culverts should also be forwarded to build pumping stations. The sluice gates have to build the shutters open and close automatically to prevent water flow into the drains during the dry season, when no rain. Management system is quite complex.

Based on the following factors: he advantages and disadvantages of each alternative described above. Existing drainage system. Ability to implement capital projects. Dong Xoai Town almost did not build a complete drainage system. The special Dong Xoai Town development in lines along Highway 14 and 741 phones,

with many lakes and streams should be well-suited to the drainage system completely separate and complete.

Therefore, selecting consultants proposed drainage system plan completely separate to apply to the project to build up the drainage system and waste water treatment in Dong Xoai town - Binh Phuoc province. Basin division- rainwater drainage direction Based on the current situation of storm water drainage of Dong Xoai towns condition, water lines, natural terrain and river systems of the Dong Xoai town spring. Basin 1 First a basin consists of a part Tan Binh ward , Tien Thanh commune. This basin exits to Cam Spring. Adjacent to the northern Cam Spring, south limited by Ton Duc Thang Street, east limited by Nguyen Binh, western limit by Hai Thuong Lan Ong. Basin 2 Includes part of Tan Binh and part of Tien Thanh commune. Outlet to the Cam Lake and Cam Lake Stream. Northern basin is limited by Orange Lake Stream, south is limited by NR 14, east is limited by Nguyen Binh, west is limited by Tran Phu Street. Basin 3 Basin 3 includes part of Tan Phu ward and Tan Dong ward. Outlet to the Cam stream and Dong Tien Lake.. This Basin is limited by Cam Spring Lake on the North, Cam Spring Lake and Tan Phu Road on the East, NR 14 on the South, belt road on the West. Basin 4



Basin 4 includes a part of Tan Thien Ward, a part of Tan Binh Ward and a part of Tan Xuan Ward. This Basin discharges into Dong Tien and Rac spring This Basin is limited by NR 14 on the North, provincial road ĐT 741 of South, belt lines of the West and East.

Sewage drainage basins In the research phase of the project, the drainage system was selected as the drainage system completely separate. Because waste water drainage systems are gravity systems, so study the drainage basin is one very important factor. Basically, waste water drainage basins as storm water drainage basin for the water line of the elements, from aquaculture same, convenient routes for the line can take advantage of terrain to reduce the maximum depth of buried culverts best. Basin 1: 400 ha, including part of Tan Phu and Tien Thanh. Basin 2: 120 ha, including part of Tan Phu. Basin 3: 140 ha, including part of Tan Phu. Basin 4: 1.000 ha, including part of Tan Phu, Tan Dong, Tan Thien, part of Tan Binh Calculation of wastewater pumping stations The sewage pumping station was built to reduce the depth of buried sewer wastewater collection, wastewater to hypertension treatment plant. Number of pumping stations are selected in accordance with actual conditions, may minimize the number of pumping stations while ensuring to the wastewater treatment plant with the best plan. Due to the nature Dong Xoai town with steep topography, this phase will be construction of pump stations 1, 2, 3, 4, 5 and treatment plant capacity m3/ngd 10.000. Based on the network of drainage systems, waste water, location of wastewater treatment station and a preliminary calculation based monitoring of culverts along with depth controlled drains placed under 4 meters, to build 05 sewage pumping stations TBT1, TBT2, TBT3, TBT4, and TBT5. Capacity of pumping stations dependent flow collectors. Both the 05 sewage pumping stations are located relatively close to residential areas. However, can fix or limit the possible influence to the surrounding environment by the following measures: For pump station location: Selection relatively independent position compared with the area. Set in the middle of roads and discharge sources. For construct pump stations: Building type submerged land, reduce pollution and bring beauty to the city. Installation of sanitary equipment for professional use. Use of chemicals necessary. For operational activities: Shortened cycles in garbage collection but definitely garbage Shorten cycle industrial hygiene

Table 4-2. Description pumping station

Pumping station

Capacity (m³/h)

Area (m²) Site

TBNT No. 1 25 (m3/h) 3,6 x 1,9m = 6,84 - Sidewalk Suoi Cam Ring Road, Tan Phu. - It is public land, located in the protection of the road corridor. - Located next to the fence of the school, classroom to the nearest 20m.

TBNT No. 2 65 (m3/h) 4,9 x 2,6m = 12,74 - Sidewalk Truong Chinh, Tan Phu. - It is public land, located in the protection of the road corridor. - The nearest houses 2m.

TBNT No. 3 178 (m3/h) 6,5 x 4,2m = 27,3 - Highway 14 road pavement, payment facilities. - It is public land, located in the protection of the road corridor.



Pumping station

Capacity (m³/h)

Area (m²) Site

- Located next to the fence Electricity Binh Phuoc, the office nearest 12m.

TBNT No. 4 25 (m3/h) 3,6 x 1,9m = 6,84 - Sidewalk Suoi Cam Ring Road, Tan Phu. - It is public land, located in the protection of the road corridor. - How's the nearest 50m.

TBNT No. 5 500 (m3/h) 7,4 x 5,1m = 37,74 - ĐT 741 Street, Tan Tra hamlet, Tan Xuan. - The vacant land owned by the people. - The nearest houses 8m.

Location of treatment plant Wastewater treatment plant is built on farm land areas near Dak Rip stream. The amount of wastewater is the major domestic wastewater in the residential town area. Therefore, wastewater treatment technology chosen by technology waste water treatment project to be located in the area of Tan Xuan commune (see drawings of wastewater). Treatment station in accordance with the planning of Dong Xoai town's drainage approved, ensure the gap to the residents according to standards; ensure the standards and regulations on minimum distance. This position must ensure adequate funds for land to build and raise capacity to phrase II. This position is located away from residential areas with minimum distance up to t ≥ 300 m. The location expected to set pumping stations and sewage treatment stations are nearly guaranteed source of medium voltage power supply for the pump station; treatment station operation. After treatment wastewater source is defined as Dak Rip stream. It is located downstream drainage of Dong Xoai town. Sources should be selected to receive suitable discharge criteria. Occupying area of the station both in 2 stages is 8,8 ha.

Table 4-3. Description of Wastewater treatment plant

Items Area (m²) Site Tái định cư Wastewater treatment plant

82.266 - Tan Tra Quarter, Tan Xuan Ward. - Agricultural land, residential land in the ownershop of people. - the location is 500m away from the nearest land slot.

9 resettled household

Road 5.703 - Tan Tra Quarter, Tan Xuan Ward. - Agricultural land, residential land in the ownershop of people

None

Comparison of option plans Table 4-4. Comparison of choices

Content Plan 1 Plan 2 Plan 3 Method Wastewater treatment in

oxidation ditch technology, combining 03 process Aerobic - Lack of air - Anaerobic.

Wastewater treatment by aerobic biological methods with sludge circulation

Wastewater treatment by natural biochemical

Process line Biological treatment by oxidation canal technology Combining aerobic treatment process - lack of air - Anaerobic should be able to clean the wastewater content of BOD, COD, nitrogen is high.

Sedimentation I - Aerotank - Sedimentation II. Aerobic Treatment compatible with stable nutrient content, low nitrogen concentration

Using anaerobic lake, duality Lake, stabilization lake (biological treatment lakes) in accordance with industrial waste water or waste water cause less odor.



Content Plan 1 Plan 2 Plan 3

Advantages - Compliance with quality and flow of seasonal inputs change, over time, concentration of waste BOD, COD, nitrogen is high. - Efficient handling of high standard to ensure the most stringent conditions. - The equipment in the oxidation ditch work independently, because the ditches differentiate into the aerobic- lack of aerobic- anaerobic zone so the unity of the aero supply system is not necessary. - The recovery time of system is fast due to does not depend on any one type of bacteria, which in the oxidation ditch all three types of bacteria, anaerobic- lack of air- aerobic operate together. - The surface of the tank is small, causes less smell. - Management and operation easy - Production costs (labor, energy) low

- The simple construction. - Suitable for waste water treatment works with small capacity, the concentration of waste stabilization. - Efficient handling of high standard to ensure the nature of wastewater conditions have stabilized. - Simple operation.

- Investment costs for initial construction is low. - The simple construction. - Management and operation easy - Production costs (labor, energy) is low. - Uses less equipments. - Suitable for all wastewater traffic. - The recovery time of system is fast due to does not depend on any one type of bacteria. - Treatment system is durable, less damage to the device does not have much, natural lakes should be easy to train restoration, maintenance

Disadvantages - Use lots of pumps and equipments. - Construction works quite complex, requiring high technology. - The system treated with BTCT so it is durable but by using many pumps and equipments so have more potential of damages, repairs. - Investment costs for initial construction is relatively high. - Cost of electricity and gas supply for the machine, an agitator,, large pumps, high production cost

- Use multiple pumps and equipment. - Air supply system must be uniform in aerotank tank, gas supply to all over the surface area of swimming as it will handle high performance. - The recovery time due to slow system must provide enough nutrients, air for aerobic microbial activity. - On the surface of lake have much smells dispersed, affecting nearby residents. - The system treated with BTCT so it is durable but by using many pumps and equipments so have more potential of damages, repairs. - Build multiple work items. - Cost of big initial investment. - Large area of land occupied. - The labor cost to manage

- Very large area of land occupied. - On the surface of lake have much smells dispersed, affecting nearby residents, especially with strong wind. - Only suitable for industrial waste water, less suitable for domestic wastewater by different odors. - The treatment possibility of biological pond is not thorough. So the quality of water after treatment is not stable



Content Plan 1 Plan 2 Plan 3 and operate high. - Cost of electricity for air blowers, pumps large, high production costs

Conclusion Via comparative financial-technical results of foresaid techniques, option 3 – using biological-treatment technology with aerobic tank and casual biological tank is proposed to be the selected one. Although this option occupies lots of area, it is suitable for all wastewater capacity, not require lots of devices, is highly durable, suits for local actual condition. Agricultural area of Dong Xoai Town is very large, most of agricultural land is for cultivating rubber trees, therefore the clearance and compensation wil be easier. Biological treatment tank technology ensures to treat wastewater normatively in accordance to Column B - Standard 14:2008, Vietnam Standard and suits the requirements of the donors.

V. ENVIRONMENT BASELINE 1. Natural conditions

Geographical position Dong Xoài Town - the capital administration unit of Binh Phuoc Province, in the Southeastern region of Vietnam, established according to 90/1999/NĐ-CP Decree on 01-09-1999 and located in the Southern of Binh Phuoc Province - has the geographical position as below: - Being bordered to the North by Dong Phu Rural – Binh Phuoc Province. - To the South and Southwest by Dong Phu Rural – Binh Phuoc Province and Phu Giao

Rural – Binh Duong Province. - To the South by Dong Phu Rural – Binh Phuoc Province. - To the West by Chon Thanh Rural - Binh Phuoc Province. Đồng Xoài Town has been divided into 8 administrative divisions, including the wards as Tan Xuan, Tan Thien, Tan Binh, Tan Phu, Tan Dong and the communes as Tien Thanh, Tien Hung, Tan Thanh.

Climate Binh Phuoc’s climate has the character of tropical monsoon that divides separately into 2 seasons. 90% the rainfall volume of the year.

Rain season Total average rainfall volume: 2,557.1 mm/year.

Table 5-1. Average rainfall volume in months of the year (Unit: mm)

Year 2000 2005 2006 2007 2008 January 12,4 0,0 3,8 2,3 0,3 February 10,6 0,0 5,3 1,8 58,4 March 91,8 44,5 256,0 108,2 99,1 April 149,8 35,7 247,0 131,9 149,0 May 361,6 301,0 243,0 272,6 342,3 June 304,7 509,1 189,0 309,4 156,2 July 374,0 300,5 152,0 274,2 240,6 August 393,3 304,5 145,0 264,8 393,4 September 408,2 521,8 143,0 392,3 607,8 October 448,2 353,2 202,0 268,4 292,7



Year 2000 2005 2006 2007 2008 November 160,2 260,7 246,0 199,2 280,1 December 105,1 217,3 218,0 145,1 77,2 Total 2.819,9 2.848,3 2.050,1 2.370,2 2.697,1

(Source: Statistical year book of Binh Phuoc in 2009)

Temperature Average temperature: 26,7oC.

Table 5-2. Average temperature of months of the year (Unit: 0C)

Year 2000 2005 2006 2007 2008 January 25,9 25,2 25,9 25,8 26,7 February 26,2 27,0 27,7 27,0 26,4 March 27,1 27,9 27,8 27,9 27,0 April 27,7 29,3 28,0 28,8 28,3 May 27,0 28,7 27,8 28,4 26,9 June 26,7 27,6 27,4 27,2 27,3 July 26,0 26,2 26,7 26,5 26,8 August 26,1 26,8 26,0 26,3 26,4 September 25,9 26,2 25,7 26,0 26,0 October 25,7 26,7 26,4 26,4 26,6 November 25,6 27,0 26,8 26,8 25,4 December 25,4 24,9 25,8 26,2 25,6 Average 26,3 27,0 26,8 26,9 26,6


Humidity Average humidity: 80,7%.

Table 5-3. Average humidity of months of the year (Unit: %)

Year 2000 2005 2006 2007 2008 January 75,0 67,0 77,0 70,7 72,0 February 74,0 69,0 71,0 68,0 67,0 March 78,0 65,0 73,0 68,7 73,0 April 85,0 68,0 80,0 73,3 78,0 May 87,0 78,0 82,0 81,7 85,0 June 87,0 84,0 85,0 85,0 85,0 July 88,0 87,0 88,0 86,7 84,0 August 89,0 85,0 90,0 87,7 86,0 September 88,0 88,0 87,0 86,3 89,0 October 90,0 86,0 88,0 85,0 86,0 November 83,0 84,0 83,0 80,7 85,0 December 81,0 80,0 75,0 75,3 78,0 Average 83,8 78,4 81,6 79,1 80,7




Dry season Total average sunlight hours in the year 2,400 – 2,500 hours, average sunlight hours of a day 6.2 – 6.6 hours. The longest sunglight periods are in less rain months (Ferbuary, March, April; les sunlight periods are in plentiful rainy months July, August, September).

Wind The major wind direction is South-west (rainy season) and North-east (dry season). Average wind speed: 0.4 m/s. Both the operational regime of the drainage system in the operation stage, work construction task in the construction stage are under affection of this climate regime.

Topography Dong Xoai Town is in the terrain of low hill and lowland, undulating, reducing the high volume from North to South, changing from 75.0-100.0 m, having many little springs and flumes. Altitude of the natural topography is the basis the divide the drainage basins of the project area into 04 basisns(details in the Project Decription)

Work Geology Work Geology of drilling pits of the proejct area mainly includes the 02 following layers: Layer 1: Basaltic clay layer, brown-red, firm and ductile, 14m thick. Layer 2: Basaltic clay layer, gray spotted, brown-red, ductile and soft, over 1m thick.

Table 5-4. Physico-mechanical

Layer Indicator

Layer 1 Layer 2

Sand content (%) 14,5 14 Dust content (%) 51,7 51

Clay content (%) 33,8 35 Humidity (%) W = 36,8 W = 53,3 Original density (g/cm³) γ = 1,760

γH = 1,745 γI = 1,735

γ = 1,685 γH = 1,670 γI = 1,660

Density (g/cm³) ∆ = 2,703 ∆ = 2,693 Void ration ε = 1,902 ε = 1,450 Soil liquid limit (%) Wch = 56,2 Wch = 68,6 Soil plastic limit (%) Wd = 28,9 Wd = 35,8 Ground viscosity B = 0,29 B = 0,53 Soil cohesion (kg/cm²) Cct = 0,276

CII = 0,256 CI = 0,244

Cct = 0,212

CII = 0,141

CI = 0,095 Angle of internal friction (degree)

φtc = 14038’ φII = 13052’ φI = 13022’

φtc = 10040’ φII = 9017’ φI = 8004’

(Source: Expanding project of water supply in Dong Xoai Town)

Hydrology Dakrip is the receiver source of treated water from the water treatment plant. The width of the spring is tight at the upstream and is expanding gradually to the dwonstream; along the banks luxuriantly grown plants, weeds obstructing the current.



At the plant construction location, the spring is about 6m wide, 2m deep incomparison the the bank; capacity in the flood season is about 11.55 m³/s with the depth of the water level is 1,5m; dry season capacity is 1,47 m³/s with the depth of the water level is 1m. Average discharging capacity of the plant is 0.116 m³/s, just equal to 1% of the flood season capacity thus not affect considerably to the current flow capacity . Claiming virgin land, wiping out the plants along the banks, mud dredging to facilitae the flow for Dakrip.

Hydro-topography Groundwater source at Dong Xoai Town is relatively diversified, good quality, can be exploited to serve manufacture and life activities. The average depth of the groundwater source is 60 - 100m, capacity 5 - 12 l/s.

Land Land includes 03 mains groups: grey soil, Acrisols, gleysols. Grey soil and acrisols are suitable for plants such as: rubber, cajuput, eucalyptus, bamboo, pepper, coffe and fruit . Gleysols fits for crops and marinetime breeding.

Terrestrial ecosystem Flora Land charateristics of Dong Xoai Town fits: rubber, cajuput, eucalyptus, bamboo, pepper, coffe, fruit and crops. Fauna Includings: animals, birds, insects, reptile... The project only impacts on the flora for clearance of the plant construction site, entrance route and plants along Dakrip’s banks for claiming.

Underwater ecosystem Underwater spieces system includes: Chlorophyta, Bacillariophyta, algea, etc. Floating and bottom animal: larva, insects etc The wastewater collection and treatment project qualifies QCVN 14:2008/BTNMT - Column B before discharging to Dakrip, solving the longstanding surface water pollution, returning the natural water environment, contributing in diversification of underwater ecosystem.

2. Socio-economic conditions Population Dong Xoai Town includes 05 wards and 03 communes, according to the statistical data of the TPC in the Year of 2009, the population growth rate is 2.87%, in which: natural growth rate is: 1.47% and mechanical rate is: 1.4% According to the Adjustment, Planning Expansion of Dong Xoai Town, Dong Xoai Town includes the whole administrative border lines of Dong Xoai Town and some communes of Dong Phú District: Thuan Phú, a part of Dong Tien, Tan Phuoc, Tan Hung of Dong Phu District. According to the statistical data, the population of Dong Xoai Town as in Expansion Planning is 100,720 people (Year 2009); estimate to Year 2020 is133,655 people. Table 5-5. Statistic of population Year 2009 and population estimation for Year 2020

No Norm Unit Current 2011 2020 I Current central area People 83.233 85.622 110.451 1 Tan Xuan Ward People 10.248 10.542 13.600 2 Tan Thien Ward People 9.036 9.295 11.989 3 Tan Binh Ward People 11.637 11.971 15.444 4 Tan Phu Ward People 13.868 14.266 18.402 5 Tan Dong Ward People 9.499 9.772 12.605



No Norm Unit Current 2011 2020 6 Tien Thanh Commune People 8.735 8.986 11.592 7 Tien hung Commune People 10.623 10.928 14.097 8 Tan Thanh Commune People 9.587 9.862 12.722 II Expansion Planning People 17487 17988 23204 9 Thuan Phú Commune People 10257 10551 13612

10 Dong Tien Commune People 3730 3837 4949 11 Tan Phuoc Commune People 2300 2366 3052 12 Tan Hung Commune People 1200 1234 1591 III Total People 100.720 103.610 133.655

(Source: Statistical year book of Binh Phuoc in 2009) Connection households (beneficiaries) expect in the year the plant is put into use (2017) to be: hosueholds and the year the plant fully works (2020) to be: households. The households are directly affected by the drainage lines construction in the construction stage are: hosueholds.. The affected households by land acquisition for wastewater treatment plant construction and entrance route are 59 households, in which, are 9 resettlment households.

Ethnic. Kinh Ethinic is the major component of the project area; besides, there are ethnic groups as follows: Tày, Thái, Hoa, Khmer, Mường, Nùng, Giao, Chăm, Mnông, Xtiêng,... according to the statistical data of the Ethnic and Religion Desk of the Province in 2006,, Dong Xoai Town has 977 households of ethnic groups.

Table 5-6. Statistic of ethnic groups

No Ward/commune Ethnic component (households) Tày Thái Hoa Khmer Mường Nùng Hmông

1 Tân Xuân 21 2 3 258 2 - - 2 Tân Bình 2 1 11 29 - 4 - 3 Tân Phú 305 4 71 318 17 155 - 4 Tân Đồng - - 9 7 - - - 5 Tiến Thành 41 - 23 3 4 35 - 6 Tiến Hưng 15 - 6 14 3 3 - 7 Tân Thành 219 1 7 2 2 109 -

No Ward/commune Ethnic component (households) Total

(households) Dao Chăm Mnông Xtiêng Others

1 Tân Xuân - - 1 11 5 303 2 Tân Bình 1 - - 5 - 53 3 Tân Phú 1 1 1 90 14 19 4 Tân Đồng - - - 1 2 35 5 Tiến Thành - - - - - 106 6 Tiến Hưng - - - 4 5 50 7 Tân Thành - - - 69 2 411

(Source: Ethnic and Religion Desk of Binh Phuoc Province) The land acquisition and resettlement of the project do not affect those groups.



Economy In2010 strive to reach economic growth rate to 16.4%, average income per cacpita reaches 21,6 mllion VND, increase 18% than 2009.

Agriculture - Strive to increase agricultural value (fixed price) 59, 4 billion VND increase 6.26% than

2009. - Density in economic structure of agriculture 10.36%. - Continue to implement effectively Resolution No. 13-NQ/TW of the Central about

continuously renovate, develop and increase the efficiency of collective economy, Central’s Resolution 5, term IX about boosting industrialize-modernize agriculture and rural areas, plan No.64-KH-TU dated November 5 2008 of Town Executive Committee regarding implementation of Central’s Resolution 7 – term X about agriculture, farmer, rural areas.

- Strengthen task of preventing disease and controlling cattle, poultry slaughter on the area.

Industry-Construction - Encourage every economic sector to invest on development of industry with scale and

competence that suitable for the realistic conditions at the locals, especially small-medium sized enterprises.

- Striving to in crease total construction Industry value (fixed price) to 216, 6 billion VND, increase 19.6% than 2009.

- Density in the economic structure of construction –industry is 37.8% - Continuously propose PPC to concern and invest on low-medium voltage grid works in

the area. - Boost the task of making urban traffic route to wards- communes with guideline that

State and people doing together. - Boost the construction completion and balance capital progress of basic construction

works, transiting from 2009. - Focus on task of site clearance- compensation for projects with the Town as the

Employer and project assigned by the Province. - Strengthen closer instruction on task of investment preparation, contractor selection,

supervising construction, consulting for design and assessment for basic construction works.

- Check and process strictly acts of breaking regulations of construction investment management.

Commerce-service - strengthen State management task in commerce-service section. - Invest on Dong Xoai market as BOT. - Total revenue of retail sales is 1,200 billion VND, increased 20 than 2009. Total

increased value of commerce-service is (fixed price) 297 billion VND, increased 16.47% than 2009.

- Density of economic structure in commerce –service 51.84%.

Financial-credit task - Mobilize all capital sources, especially the receipts from land to create investment

capital for infrastructure. - Strengthen tax management of private Industry –Commerce –Service sector and

business households in goods, passenger’s transpiration. - Ensure basic expenses: salary and activities of office. - Striving to reach total budget receipts 189,074 billion VND, in which additional receipts

on the area is 128,355 billion VND.



- Total budget expenses 187,649 billion VND, in which expense for basic construction is 64 billion VND.

- Bank credit activities: strive to increase mobilizing capital from 20 -25%, loan account outstanding increase from 20-22%, expired account outstanding under 1%.

Resource management - Strengthen effective management and usage task of state land fund in the area. - Complete land inventory task and build up current map of 2010. - Roll out and implement granting LURC and house ownership right in compliance with

Decree No.88/NĐ-CP of the GoV. - Organize to regularly measure, draw, grant LURC with the land that separated from

forestry zone. - Striving to grant 700 new LURCs. - Check and process strictly the illegal exploitation of red-soil. Resource mangeent task is carried out well by the local government, making convinient premises for land acquisition and resettlment of the project.

Municipal management - Strengthen management of municipal planning in the area. - Approve, adjust planning of Administrative Centre of wards, commune. - Overhaul and propose PPC to adjust or cancel some projects under management of the

province without feasibilities. - Municipal justification: Install street, alley, traffic signs. Paint the heart line, improve,

grow trees on some urban routes, maintain and repair public lighting system for “Golden Cashew Nut of Vietnam –Binh Phuoc” festival I, 2010...

Environment sanitation Build up plan and establish the environment sanitation test crops to facilities, enterprises at the area. Build up the implmenting plan for environment sanitation campaign creating grean, clean, beautiful urban landscape.

Technical Infrastructure

Transportation Road network in Dong Xoai town has 02 main roads: NR14 and DT741; domestic transportation includes urban asphalt roads link wards to facilitate the convinient travel.

Power supply Project area has medium-voltage lines 15KV, 35KV from Dong Xoai station and lines110 KV, 500 KV across the town. From this transformer station, electricity is supplied 100% for the current demand of the Town.

Water supply Dong Xoai Town is supplied water from the Cam Spring Plant with flow capacity approx. 8,000 m³/day, water supply ration only reachs 22%. Expansion project, capacity upgrade for the water plant is being implemented parallely to this project to properly meet the clean water demand of Dong Xoai Town.

Drainage and submergance status Dong Xoai Town locates on the slopy area, with springs and lake, facilating for natural drain. Drainage line (the rainwater drainage sewer line with domestic wastewater to the manholes) is not invested properly, has been built according to the progress of routes construction so the drainage altitudes are not synchronous, results in partial submergence at 02 point as follows: - 1st point: intersection of NR14 and Phu Rieng Do Road, submerged area about 3.1 ha,

affected households around 158 households.



- 2nd point: alley next to Tân Hoàng Long Company, from NR14 long to Phú Riềng Đỏ, submerged area about 6.4 ha, affected households around 422 households.

The project will invest and construct the private drainage system, solve the submergence, drain rainwater, collect and treat domestic wastewater.

Communication Radio network is expanded , build up the project of 4-level radio at wards, communes; invest, install and put into use 10 non-cord speaker clusters at 8/8 wards, communes, facilitate people to approach mass media means, catch info about economy-cutulre and society- national defence of the Party, The GOV and the local. Accoring to the socio-economic survey, 99% of the households owns TVs facilitating project info propaganda to the community.

3. Status of the environment quality in the project area Air quality Base on the survey’s result at the project area from October 4th 2010 to October 13th 2010 under cooperation of Han Minh Consult –Construction – Commerce Co.Ltd and Environment Technology & Labor ‘s Safety and Sanitation Consultant Centre , the analysis, measurement results as follow:

Table 5-7. Sample Code

No Code Explanation Site 1 KK-01 Plant constructing area Tan Tra Quarter, Tan Xuan Ward 2 KK-02 Discharge gate at the plant + Dakrip Spring Tan Tra Quarter, Tan Xuan Ward 3 KK-03 Boost pumping station 1 Sidewalk Suoi Cam Ring Road, Tan

Phu. 4 KK-04 Boost pumping station 2 Sidewalk Truong Chinh, Tan Phu. 5 KK-05 Boost pumping station 3 Sidewalk QL 14, payment facilities. 6 KK-06 Boost pumping station 4 Sidewalk Suoi Cam Ring Road, Tan

Phu Ward. 7 KK-07 Boost pumping station 5 ĐT 741 Street, Tan Tra Quarter, Tan

Xuan Ward 8 KK-08 Rainwater discharge gate 1 (bridge no. 2) Bridge No.2, ĐT 741 Street 9 KK-09 Rainwater discharge gate 2 (Cam Spring

Lake) Suoi Cam Lake, Tan Phu Ward

Table 5-8. Total table of air quality survey result

No Norm Site

Suspended dust (mg/m³)

PM10 Dust

(mg/m³)

SO2 (mg/m³)

NO2 (mg/m³)

CO (mg/m³)

Pb ( g/m³)

O3 (mg/m³)

1 KK-01 0,21 0,12 0,031 0,047 2,71 < 1,0 0,02 2 KK-02 0,23 0,10 0,033 0,066 3,01 < 1,0 0,02 3 KK-03 0,20 0,14 0,035 0,063 2,80 < 1,0 0,04 4 KK-04 0,20 0,13 0,041 0,058 2,65 < 1,0 0,05 5 KK-05 0,22 0,15 0,033 0,065 2,91 < 1,0 0,04 6 KK-06 0,24 0,12 0,035 0,035 3,05 < 1,0 0,05 7 KK-07 0,21 0,10 0,037 0,021 3,00 < 1,0 0,05 8 KK-08 0,23 0,13 0,033 0,045 2,81 < 1,0 0,03 9 KK-09 0,23 0,12 0,038 0,051 2,90 < 1,0 0,03

QCVN 05:2009/BTNMT

0,30 0,15 0,350 0,200 30,00 1,5 0,18

(See Annex)



Comment The result of measurement, analysis of air samples in the project area and comparison to National Technological Standard for surrounding air quality (QCVN 05:2009/BTNMT) shows that the air quality stays within the acceptable limit.

Surface water quality Base on the result of the survey, analysis of environment at the project area from October 4th

2010 to October 15th 2010 under cooperation of Han Minh Consult-Construction-Commerce and Environment Technology& Labor’s Safety and Sanitation Consultant Center, the analyzed results of surface water’s elements as follow:

Table 5-9. Sample Code

No Code Explanation Site 1 NM-01 Discharge gate at the plant + Dakrip

spring Tan Tra Quarter, Tan Xuan Ward

2 NM-02 Cam Spring Lake Tan Phu Ward 3 NM-03 Dong Tien Spring Tan Dong Ward 4 NM-04 Tam Vong Spring Tan Binh Ward



Table 5-10. Total table of surface water quality survey result

No Norm Site

pH Amoni (mg/l)

Clorua (mg/l)

BOD5 (mg/l)

COD (mg/l)

DO (mg/l)

Suspended solid (mg/l)

Florua (mg/l)

Nitrat (mg/l)

Nitrit (mg/l)

Photpho (mg/l)

surface active

material (mg/l)

Phenol Content, botanical protective

agent organic

phosphorous, organic

Chloride (mg/l)

Fe (mg/l)

Total Coliform

(MPN/100ml)

1 NM-01 5,65 0,002 9,0 18,8 54,0 6,85 68,7 0,4 1,1 0,032 0,138 0,1 KPH 0,041 6.400 2 NM-02 5,70 0,036 23,0 4,3 36,4 6,70 69,8 0,4 1,5 0,081 0,173 0,2 KPH 0,018 3.200 3 NM-03 6,03 0,062 25,0 8,8 24,3 6,93 67,3 25,0 1,5 0,079 0,224 0,1 KPH 0,035 3.000 4 NM-04 6,01 0,051 15,0 16,8 60,8 7,05 70,4 15,0 2,0 0,072 0,145 0,1 KPH 0,024 4.100

QCVN 08:2008/BTNMT -

Cột B2

- - - 25,0 50,0 - 100,0 2,0 - 0,050 - - - - -

(See Annex)

Comment The result of measurement, analysis of spring’s and lake’s water samples in the project area and comparison to National Technological Standard (QCVN 08:2008/BTNMT) shows that the surfacewater of springs has signs of pollution by COD, Florua, Notrit and not fit for irrigation, maritime breeding and domestic use; in which, is Dakrip.

Underground water quality Base on the result of the survey, analysis of environment at the project area from October 4th

2010 to October 13th 2010 under cooperation of Han Minh Consult-Construction-Commerce and Environment Technology& Labor’s Safety and Sanitation Consultant Center, the analyzed results of underground water’s elements as follow:

Table 5-11. Sample code

No Code Explanation Site 1 NN-01 Plant construction area Tan Tra Quarter, Tan Xuan Ward 2 NN-02 Boost pumping station No.1 Sidewalk Suoi Cam Ring Road, Tan Phu. 3 NN-03 Boost pumping station No.2 Sidewalk Truong Chinh, Tan Phu. 4 NN-04 Boost pumping station No.3 Sidewalk QL 14, payment facilities.



No Code Explanation Site 5 NN-05 Boost pumping station No.4 Sidewalk Suoi Cam Ring Road, Tan Phu Ward. 6 NN-06 Boost pumping station No.5 ĐT 741 Street, Tan Tra Quarter, Tan Xuan Ward

Table 5-12. Total table of underground water quality survey result No Norm

Site

pH Hardness

(mg/l)

Total solid (mg/l)

COD (mg/l)

Clorua (mg/l)

Florua (mg/l)

Nitrat (mg/l)

Nitrit (mg/l)

Fe (mg/l)

Amoni (mg/l))

Asen (mg/l)

Mangan (mg/l)

Total Coliform

(MPN/100ml)

1 NN-01 6,31 50,0 145,5 2,15 8,08 0,2 0,5 0,037 0,955 0,031 0,001 0,005 2,0 2 NN-02 6,50 240,0 574,0 2,00 21,2 0,3 0,8 KPH 0,520 0,091 0,002 0,001 2,0 3 NN-03 4,71 16,0 110,0 1,85 12,1 0,8 1,0 KPH 0,351 0,041 0,001 0,004 3,0 4 NN-04 4,42 12,0 138,9 1,98 10,1 0,2 0,5 KPH 0,186 0,021 0,003 0,001 2,0 5 NN-05 4,95 12,0 117,9 1,67 12,1 0,3 1,0 0,023 0,082 0,030 0,001 0,002 2,0 6 NN-06 5,22 26,0 132,0 2,13 14,0 0,1 0,8 KPH 0,056 0,009 0,002 0,004 2,0

QCVN 09:2008/BTNMT

5,5 - 8,5 500,0 1.500,0 4,00 250,0 1,0 15,0 1,0 5,000 0,100 0,050 0,500 3,0

(See Annex) Comment

The result of measurement, analysis of water samples at specific points of the construction in the project area and comparison to National Technological Standard (QCVN 09:2008/BTNMT) shows that the undergroundwater quailty stays within the acceptable limit..

Wastewater quality Base on the result of the survey, analysis of environment at the project area from October 4th

2010 to October 13th 2010 under cooperation of Han Minh Consult-Construction-Commerce and Environment Technology& Labor’s Safety and Sanitation Consultant Center, the analyzed results of wastewater’s elements as follow:


No Code Explanation Site 1 NT-01 Current rainwater discharging gate No.1 Tan Thien Ward 2 NT-02 Current rainwater discharging gate No.2 Tien Thanh Ward 3 NT-03 Current rainwater discharging gate No.3 Tan Dong Ward 4 NT-04 Current rainwater discharging gate No.4 Tan Phu Ward



No Code Explanation Site 5 NT-05 General hospital Tien Thanh Ward 6 NT-06 Bus station Tan Xuan Ward 7 NT-07 Hung vuong Hotel Tan Binh Ward 8 NT-08 Household1 (Đồng Xoài intersection) Dong Xoai intersection, Tan Binh Ward 9 NT-09 Household2 (T-junction NR14 - Nguyễn Bình street) QL14 - Nguyen Binh, Tan Phu Ward 10 NT-10 Household3 (T-junction Hùng Vương - ĐT 741) Hung Vuong - DT 741, Binh Tan Ward

Table 5-14. Total table of wastewater quality survey result

Stt Norm Site

pH TSS (mg/l)

BOD5 (mg/l)

H2S (mg/l)

Amoni (mg/l)

Nitrat (mg/l)

Phosphat (mg/l)

Botanical and

animal lubricant

(mg/l)

Total Coliform

(MPN/100ml)

1 NT-01 6,25 68,3 15,86 0,2 0,395 8,6 0,035 5,2 3.100 2 NT-02 6,56 72,4 54,68 0,1 3,115 8,2 0,041 3,5 5.300 3 NT-03 7,49 70,8 14,65 0,05 2,155 7,3 0,682 2,9 2.800 4 NT-04 6,85 69,7 36,80 0,2 2,817 9,2 0,124 2,1 4.600 5 NT-05 6,37 72,3 39,90 0,2 1,090 5,8 0,062 8,5 4.000 6 NT-06 5,20 84,3 177,0 0,3 4,160 12,2 0,250 15,4 6.000 7 NT-07 9,00 85,7 21,76 0,1 0,091 16,3 0,412 14,0 4.300 8 NT-08 7,11 64,5 49,60 0,1 0,317 0,058 0,125 10,4 5.000 9 NT-09 6,20 60,8 48,70 0,1 0,281 10,4 0,066 10,2 5.200

10 NT-10 6,36 70,2 53,60 0,1 0,781 5,6 0,14 12,2 7.000 QCVN

14:2008/BTNMT - Cột B

5,0 - 9,0 100,0 50,00 4,0 10,000 50,0 10,00 10,0 5.000

(See Annex) Comment Fromthe survey, analysis result of domestic wastewater at centralized discharging point, households, manholes in the project area and comparison to National Technological Standard for domestic wastewater (QCVN 14:2008/BTNMT) shows that the domestic wastewater has Norms such as BOD5, Coliform exceed the limit.



Tiếng ồn, bức xạ nhiệt Base on the result of the survey, analysis of environment at the project area from October 4th 2010 to October 16th 2010 under cooperation of Han Minh Consult-Construction-Commerce and Environment Technology& Labor’s Safety and Sanitation Consultant Center, the analyzed results of micro-climate, noise’s elements as follow:

Table 5-15. Survey result of Noise

Radiation No Site Value (dBA) Value

(cal/cm²/min) Value (W/m²)

1 KK-01 51 - 52 0,83 579,2 2 KK-02 47 - 49 0,84 586,2 3 KK-03 71 - 72 0,82 572,2 4 KK-04 70 - 72 0,82 572,2 5 KK-05 68 - 70 0,80 558,2 6 KK-06 47 - 49 0,80 558,2 7 KK-07 73 - 75 0,81 565,2 8 KK-08 71 - 72 0,85 593,1 9 KK-09 69 - 70 0,84 586,2 TCVN 5949:1998 3733/2002/QĐ-BYT

75 - 100,0

(1 cal/cm²/min = 697,8 W/m²) (See Annex)

Comment Roll out the collection, analysis of soil samples at the specific points of the project area and comparison to National Technological Standard regarding accpetable limits for heavy metals in soil (QCVN 03:2008/BTNMT) shows that they heavy metals components in soils stay within the limit. All of points of survey (9/9 points, occupy 100.0%) have Thermal radiation higher than the allowed Value for Thermal radiation frequency as in micro-climate standard (the allowed anto in dry season is 100 W/m² when contact with 25% area of people’s body) issued with Decision No.3733/2002/QĐ-BYT dated October 10th 2002 of the Ministry of Health regarding issuing 21 standards of labor hygiene.

Heavy metals in soil Base on the result of the survey, analysis of environment at the project area from October 4th 2010 to October 16th 2010 under cooperation of Han Minh Consult-Construction-Commerce and Environment Technology& Labor’s Safety and Sanitation Consultant Center, the analyzed results of heavy metal’s elements in soil as follow


No Code Explanation Site 1 Đ-01 Plant constructing area Tan Tra Quarter, Tan Xuan Ward 2 Đ-02 Discharge gate at the plant + Dakrip

Spring Tan Tra Quarter, Tan Xuan Ward

3 Đ-03 Boost pumping station 1 Sidewalk Suoi Cam Ring Road, Tan Phu.

4 Đ-04 Boost pumping station 2 Sidewalk Truong Chinh, Tan Phu. 5 Đ-05 Boost pumping station 3 Sidewalk QL 14, payment facilities. 6 Đ-06 Boost pumping station 4 Sidewalk Suoi Cam Ring Road, Tan Phu

Ward. 7 Đ-07 Boost pumping station 5 ĐT 741 Street, Tan Tra Quarter, Tan

Xuan Ward



No Code Explanation Site 8 Đ-08 Rainwater discharge gate 1 (bridge no. 2) Bridge No.2, ĐT 741 Street 9 Đ-09 Rainwater discharge gate 2 (Cam Spring

Lake) Suoi Cam Lake, Tan Phu Ward

Bảng 5-17. Bảng tổng hợp kết quả khảo sát kim loại nặng trong đất

No. Norm. Site

As (mg/kg)

Cd (mg/kg)

Cu (mg/kg)

Pb (mg/kg)

Zn (mg/kg)

1 Đ-01 6,9 0,9 51,2 41,5 91,2 2 Đ-02 7,2 0,8 48,5 44,0 85,5 3 Đ-03 4,1 0,8 58,4 32,6 60,0 4 Đ-04 5,3 1,1 52,0 30,5 68,4 5 Đ-05 4,2 1,2 50,4 31,4 55,6 6 Đ-06 5,2 0,8 45,0 28,6 55,5 7 Đ-07 5,0 1,3 50,2 38,5 52,2 8 Đ-08 5,8 1,0 48,8 26,4 81,5 9 Đ-09 5,1 1,0 60,1 31,0 54,8

QCVN 03:2008/BTNMT 12,0 5,0 70,0 100,0 200,0 (See Annex)

Comment Roll out the collection, analysis of soil samples at the specific points of the project area and comparison to National Technological Standard regarding accpetable limits for heavy metals in soil (QCVN 03:2008/BTNMT) shows that they heavy metals components in soils stay within the limit.

Overview Assessment Table 5-18. Synthetic Evaluation of ground environment’s sensitivity

Sentitive level Environmental norm Vulnerable Bearable Invulnerable

AIR Floating dust Concentration * PM10 Dust Concentration * SO2 Gas Concentration * NO2 Gas Concentration * CO Gas Concentration * Lead Concentration (Pb) * Noise * Thermal radiation * SURFACE WATER pH * Ammonium Content * Clorua Content * BOD5 Content * COD Content * Dissolving Oxide (DO) * Suspended solids * Flouride content *



Sentitive level Environmental norm Vulnerable Bearable Invulnerable

Nitrate content * Nitrite content * Phosphorous content * Surface active material * Phenon content, botanical proctective agent – organic phosphorous, organic Clo

*

Iron content * Lubricant content * Coliform content * UNDERGROUND WATER pH * Hardness * Total solids * COD content * Chlorite (Cl-) content * Floride content * Nitrate content * Nitrite content *

Sulfate content( 2-4SO ) *

Iron content * Amomnium content * Arsen content * Manganese content * Coliform content * HEAVY METALS Arsen * Cadimi * Copper * Lead * Zinc *

From the above evaluation chart, the natural environment of the project area shows sigh of vulnerability by the following environmental norms: - Air environment: Dust concentration, Noise, Thermal radiation. - Surface water environment: pH, BOD5 Content, COD Content, Suspended solids,

Floride content, Nitrite content, Phosphorous content, Coliform content. - Underground water environment: pH, Floride content, Ammonium content, Coliform

content. Therefore, must pay attention and apply thoroughly mitigations to the impacts on the vulnerable norms during the project implementation.



Table 5-19. Synthetic evaluation of domestic wastewater Pollution level Environmental norm Severe pollution

Light pollution

Dischargable

pH * Suspended solids * BOD5 content * Sulphuret content (H2S) * Ammonium content * Nitrate content * Phosphate content * Botanical-animal lubricant * total Coliform *

The above chart shows that, domestic wastewater in the project area is polluted by organic contents (BOD5, Botanical-animal lubricant) and micro-organism (total Coliform). After the completion, the project will collect and treat this domestic wastewater in compliance with QCVN 03:2008/BTNMT before discharging to the environment. However, during the construction, wastewater of on-site staff treatment measure is a must to mitigate the pollution pressure to the natural surface water.

VI. ENVIRONMENTAL IMPACT ASSESMENT POSSITIVE IMPACT If implemented, The project: construction of drainage and wastewater treatment system in Dong Xoai Town will solve 100% the current submergence and prevent submergence in the future. The current submergece area is solved about 9,5 ha, the beneficiary households are about 580 households. The collection and treatment of wastewater in Dong Xoai Town with capacity 10.000 m³/day as in dischargement standard into the receiving source- Dakrip Spring, will solve the surface water issues and bad odor from daily activities.. Reduce the BOD5 discharging into the enviroment from 2.500 ton/day (250g BOD5/m³ wastewater x 10.000 m³/day) to 500 ton/day (50g BOD5/m³ wastewater x 10.000 m³/day). Create jobs for local labors by takeign part in construction of the project’s work items. Increase the environment protection awareness of the community via socio-economic survey, community consultancy and from the project’s efficiency itself. The efficiency is tremendeous, contributing in increase the living quality via the resolution of pollution; boost economic, social, infrastrusctural development of the project area in particular; reducing the moving-labor to other big cities, creating more jobs for the people in the project area;; attracting investments; ensureing the sustainable development of the town.

IMPOSSITIVE IMPACT 1. Period of preparing for investment

The period of preparing for investment includes the things relating to procedure, project document (eg. Examining and measuring an area of land, surveying geological structure, surveying economy-society, surveying and collecting the document to build investment project,… ), land (compensation, resettlement, land clearance,… ). Therefore, the affecting resources relating to trash in this period mainly begin with surveying and clearing land, resettling.



Impact Social impact The area of permanently withdrawn land to serve for building the work items is the project includes:

Table 6-1 . The area of withdrawn land in the period of preparing for investment

No. Work item Area (m²) Land status Site Resettlement 1 Waste water

treatment factory 82.266 Agriculture land - Tan Tra Quarter, Tan

Xuan Ward. - Agricultural land, residential land in the ownershop of people. - the location is 500m away from the nearest land slot.

5 householes

2 Road 5.703 Agriculture land - Tan Tra Quarter, Tan Xuan Ward. - Agricultural land, residential land in the ownershop of people

None

3 Waste water pump station no. 1

12,74 Public owner, sidewalk

- Sidewalk Suoi Cam Ring Road, Tan Phu. - It is public land, located in the protection of the road corridor. - Located next to the fence of the school, classroom to the nearest 20m.

None

4 Waste water pump station no.2


- Sidewalk Truong Chinh, Tan Phu. - It is public land, located in the protection of the road corridor. - The nearest houses 2m.

None



- Highway 14 road pavement, payment facilities. - It is public land, located in the protection of the road corridor. - Located next to the fence Electricity Binh Phuoc, the office nearest 12m.

None



- Sidewalk Suoi Cam Ring Road, Tan Phu. - It is public land, located in the protection of the road corridor. - How's the nearest 50m.

None


37,74 Agriculture land, people owner

- ĐT 741 Street, Tan Tra Quarter, Tan Xuan Ward - The vacant land owned by the people. - The nearest houses 8m.

None

The project required permanent withdrawal of land area is 8.23 ha to build wastewater treatment plants; 0.57 hectares of road construction on the plant; 0.01 ha to build five sewage pumping stations and scope of sidewalk, curb temporarily withdrawn along the



drainage. The issue of compensation, site clearance and resettlement directly affect the lives, economic income of the households affected include: - Loss of farmland, loss of income. - Loss of housing, changing the habitat. - Convert-occupation, the new habitat.

Exhaust gas, Dust - The resources of exhaust gas and dust in the period of preparing for investment

comprise: Vehicles: motorcycle (gasoline engine), car (diesel engine) for going to surveying

and collecting the documents in the project’s area. Quantity: 12 bikes (get hired at local area), 1 4-seater car, 1 light truck 2,5 tons.

Auger (diesel engine) for drilling geological structure. Quantity: 02 augers. Grass cutting machine, cutting machine (gasoline engine) for clearing the area

planned to build the waste water treatment factory. Quantity: 3 grass cutting machine, 2 cutting machine.

- The exhaust gas of petrol and diesel engine consists of the elements causing the air pollution such as SO2, NOx, CO, Volatile organic compound (VOC),… The coefficient of air pollution loads from fuel combustion of gasoline and diesel engine is listed in the following table:

Table 6-2. The coefficient of air pollution loads from stationary combustion

Coefficient of air pollution loads from fuel combustion (kg/ton of fuel)

No. Kinds of Engine

TSP SO2 NOx CO VOC 1 Gasoline Engine < 50cc, 2-stroke 6,7 20S 2,8 550 330 2 Gasoline Engine > 50cc, 4-stroke - 20S 8 525 80 3 Car with diesel engine < 3,5 tons 3,5 20S 12 18 2,6 4 Truck with diesel engine 3,5 -16 tons 4,3 20S 55 28 12

(Source: Assessment of Sources of Air, Water and Land Pollution; Part one; by World Health Organization, Geneva, 1993)

Solid wastes - The generated source of solid wastes in the period of preparing for investment includes:

Borehole: sludge in the boreholes. Quantity of borehole: 18 holes; including: 03 holes with the depth of 30,0 m at the factory-building planned area, 15 holes with the depth of 10,0 m at 5 waste water pump stations and 10 positions on pipelines network.

The waste water treatment factory-building planned area: trees, grass… in the process of land clearance.

Technicians, Engineers… make the survey and collect the documents: municipal wastes. The quantity of Technicians, Engineers, … in the plan is 34 people; in there: 2 machine groups (10 people) for examining and measuring the land, 2 drilling groups (10 people) for examining geological structure, 1 group (14 people) for economic-Social survey.

- The volume of average domestic waste per capita per day and the ingredients of domestic waste are mentioned as below:

Table 6-3. The rate of domestic waste in the municipal wastes and the volume of average domestic waste per capita per day

Rate of Domestic waste in the municipal wastes (%)

Volume of average waste (kg/day)

No Ingredients

Value Feature Value Feature 1 Domestic waste 50 - 70 62 1,41 - 2,13 1,73



Table 6-4. The ingredients of domestic waste

No Ingredients Rate (%) Volume I Organic Ingredient 79,6 1,38 1 Food 9,4 0,16 2 Paper 33,8 0,58 3 Paperboard 6,0 0,10 4 Plastic 7,0 0,12 5 Cloth 2,0 0,03 6 Rubber 0,5 0,01 7 Leather 0,5 0,01 8 Garden trash 18,4 0,32 9 Wood 2,0 0,03 II Inorganic Ingredient 20,4 0,35 1 Glass 7,9 0,14 2 Ferrous can 6,0 0,10 3 Aluminum 0,5 0,01 4 Other material 3,0 0,05 5 Ash, Dust 3,0 0,05 Total 100,0 1,73

(Source: Integrated Solid Waste Management, McGraw-Hill, International Editions)

Wastsewater - The resource of effluent in the period of preparing for investment includes:

Borehole: liquid bentonite used to prop the edge of borehole has the main elements, such as water and bentonite clay (consisting mostly of monmorilonnite) and the admixtures such as glass powder or bagasse, straw,…

Technicians, Engineers… make the survey and collect the documents: domestic effluent.

- The content of dirty substances of domestic effluent per person per day is listed as below:

Table 6-5. The content of dirty substances of domestic effluent per person per day

No Ingredients Volume (g/person.day) 1 Dry solid (SS) 50 - 55 2 Deposited BOD5 25 - 30 3 Deposited BOD20 30 - 35 4 N-NH4

+ 7,0 5 Total Phosphorus 1,7 6 Chlorine 10 7 Surface active agent 2,5 - 3,2

(Source: Tiêu chuẩn xây dựng TCXD 51-84 Thoát nước - Mạng lưới bên ngoài và công trình, 2003)



Table 6-6. Ingredients of domestic effluent

Concentration No. Ingredients Low Average High

1 Total soluble solids (mg/l) 250 500 850 2 Dry solid (mg/l) 100 220 350 3 Deposited solid (mg/l) 5 10 20 4 BOD5 (mg/l) 110 220 400 5 Total organic carbon (mg/l) 80 160 210 6 Total Nitrogen (N) (mg/l) 20 40 85 + Organic 8 15 35 + Free Amonia 12 25 50 + Nitrite 0 0 0 + Nitrate 0 0 0 7 Total Phosphorus (P) (mg/l) 4 8 15 + Organic 1 3 5 + Inorganic 3 5 10 8 Chlorine (mg/l) 30 50 100 9 Sulfate (mg/l) 20 30 50 10 Oil and Grease (mg/l) 50 100 150 11 Coliform (No./100 ml) 106 - 107 107 - 108 107 - 109 12 Volatile organic compound (µg/l ) < 100 100 - 400 > 400

(Source: Giáo trình xử lý nước thải, TS. Nguyễn Phước Dân, Khoa Môi trường, Đại học Bách khoa Tp. HCM, 2004)

- The volume of domestic effluent in the period of preparing for investment is calculated as below:

Table 6-7. The volume of domestic effluent in the period of preparing for investment

No Norm Unit Value 1 Number of technical staff, worker, engineer,... Person 24 2 Water standard per person l/person.day 90 3 Average volume of using water per day m³/day 2,2 4 Volume of domestic effluent calculated by 80%

of used water volume m³/day 1,8

Noise - The generated source of noise in the period of preparing for investment comprises:

Vehicles: motorbikes, cars for surveying and collecting the documents in the area of project.

Auger for drilling geological construction. Grass cutting machine, saw machine for reclaim the planned land of waste water

treatment factory. - A equivalent noise level of vehicle stream is told as below:



Table 6-8 . Equivalent noise level of vehicle stream (7,5 m from the edge of the road, when vehicle stream has 20% of trucks and buses, velocity 40 km/hr))

No. Intensity of vehicle stream N (vehicle/hour) Noise dose (dBA) 1 40 65,0 2 50 65,5 3 60 66,0 4 100 66,5 5 150 67,0 6 200 68,0 7 300 69,0 8 400 70,0 9 500 70,5 10 700 71,0 11 900 72,0 12 1.000 72,5 13 1.500 73,0 14 2.000 74,0 15 3.000 75,5 16 4.000 76,0 17 5.000 77,0 18 10.000 78,0 (Source: Âm học kiến trúc, Cơ sở lý thuyết và các giải pháp ứng dụng, PGs.Ts. Phạm Đức

Nguyên, Nhà xuất bản Khoa học và Kỹ thuật)

Risks and environment problems As mentioned above, in the period of preparing for investment, the generated source of waste only appears when surveying, collecting the documents and land clearance. The impacts (exhaust fume, dust, waste water, solid waste, noise) to the environment in the period is limited and insignificant. The number of facilities and human resources participating in surveying and collecting the documents is low, if the effects don’t occur more different than what happen as usual, the bearing of environment is able to accept. Therefore, there will be no risk or environment problem other than the effects were evaluated in the period of preparing for investment.

Mitigation measures Choice Waste water treatment plant Ground for the waste water treatment plant is selected according to the principles which minimize the impacts on the environment as below: - Away from the residential area. - Located in the end of the wind direction. - Waste water receiving source after the treatment is not raw water supply source for

surface water treatment plant . - Not in the area of the cultural heritage, protected area. - Ground clearance area is smallest and less of affected households. Basing on the principles above, the location chosen to build the waste water treatment plant is the land located next to Dakrip stream in Tan Xuan ward, Dong Xoai town; construction area is 8,23 ha. Using the joined map method, setting up the drainage line on the sidewalk reasonably to minimize the environmental impact on the households in the implementation process.



Exhaust fumes, dust Exhaust fumes, dust arise from the investment preparation: 12 motorbikes, 1 car, 1 truck, 2 drills, 3 lawn mowers, 2 sawing machines with small load emission, operation time is in the administrative hours (8 hours/day). QCVN 05:2009/BTNMT - National Technical Regulation on air quality do not limit the value of the basic parameters in the atmosphere around 8 hours in average for dust, SO2, NOx, VOC with the limited content CO 10.000 µg/m³ . However, to ensure the safety for the air during the research process, it needs to implement detailed measures as below: Motorbikes: use brand names Honda, Yamaha… with the life 5 years or with the speedometer 60.000 km. These are the products of motorbike manufacturers which comply the emission standard, ensure the environment safety during the operation. Moreover, the quantity of motorbikes used for the research process is small so the generated emissions load is very low, the natural environment can sufficiently bear to this. - Cars, trucks: use brand names Ford, Hyundai who has complied the emission standard,

with the life 5 years, has been certificated to allow the circulation that ensures the environment safety.

- Drill, lawn mower, sawing machine: use brand names Yamaha, Honda,…which is produced to comply the emission standard, with the life 5 years, certificated in quality so they ensure the environment safety.

- Regularly check the machines, avoiding the breaking down and performance the maintenance promptly.

Solid waste Geological mud hole, bentonite clay is essentially the substance does not cause environmental pollution. In the course of drilling, they are collected, poured neatly in the drilling area and drill holes returned after the completion of drilling holes Trees, Grass, ... arising from the work of clearance was gathered into neat piles and contact the Public Enterprise to be transported to landfills, sanitary landfills. Domestic waste of technicians, engineers ... including 34 people with weight 1,73 kg/person.day. This contingent of living in hotels, motels in Dong Xoai. Generated domestic waste is collected in garbage cans of hotels, motels or restaurants. This is the basis that Public Enterprise collect everyday it ensures the environmental hygiene.

Waste water Water losses incurred when performing drilling holes containing bentonite and groundwater; naturally this is not waste water. This water contains mud holes, bentonite clay and bentonite to be deposited to use continuously, deep water is absorbed into the land. The domestic water of the research team is approximately 1,8 m³/day is preliminarily treated by septic tanks of hotels, motels to lessen the impact on the environment.

Noise Noise generated in the preparation of investment from: 12 motorcycles, one car, one truck, two drilling machines, three mowers, two sawing machine with a small noise level because this is a product of advanced countries as described in part 1.1.1, production standards on noise, operating time (8 hours / day) so impact level on residential area is negligible and is in the significant limits on noise under the provisions of Vietnam. However regularly check the machines, avoiding the breaking down and performance the maintenance promptly

Social The drainage and waste water treatment project in Dong Xoai Town is the project that solves the urban water pollution issue, rain water collection and drainage, domestic waste water collection and treatment. Therefore the project is considerably meaningful to urban residences and the local authority. To implement to project properly, in the investment preparation stage, the province needs to inform people via news, radio about this project for them to know and coordinate implementation tasks such as: compensation, clearance and resettlement, socio-economic survey.



The project has relative demand on land revocation: 4.71 ha for waste water treatment plant, 91.46 m² for 5 waste water pumping station and temporarily revoked sidewalks along drainage lines. The compensation, clearance and resettlement issues directly affect to the livelihood, economic income of the affected households, include:

Loss of cultivatable land, income source. Loss of houses, changes in living area. Job changes, new living environment

The location for waste water treatment plant construction is selected to minimize the socio-environmental affection to the people. The revoked land’s area is calculated adequately for de demand of allocating work items; the quantity of the affected households is minimum. Inform the people about the general measure of compensation, support and resettlement; encourage the consent avocation of the people to the project for the clearance task to be convenient, solved as soon as possible. Implement the compensation, support and resettlement rationally; ensure the equality and adequacy, not conflicts about the interests of the project and public benefits for affected households. Inform the socio-economic survey implementation plan, which serves the project, for people to know about the project, avoid panic, suspicion, create the trust to gain the coordination during the survey, ensure the info is precise. The survey implementation staff (socio-economic, topography, geology survey) temporarily resident in the local for about 2 months, therefore, to ensure the security and order, they shall register to the ward, commune police for the temporary residence as the regulations.

2. The period of investment and construction Impact In this period, the construction machines served in building are considered as The generated source of the effects according to the evaluation about the effect on environment. The construction machines has been divided into 5 groups (4 groups on the pipeline network and 1 group at the waste water treatment factory) as below:

Table 6-9 .Planned number of main machines for construction

No. Kind of construction machines Quantity Construction position, transport 1 Soil moving truck: 15 tons 30 trucks Land supplier, road, leveling

ground, pipelines 2 Sand and stone moving truck: 15

tons 4 trucks Roads from sand, stone supplier to

the water factory 3 Cement, iron and steel moving

truck: 19 tons 2 trucks Roads from warehouse for cement,

iron and steel to the water factory 4 Soil moving truck: 5 tons 8 trucks Pipelines, roads to place has the

leveling demand or disposal ground

5 Excavator bucket : 0,5 - 1,5 m³ 8 machines Land supplier, leveling ground, work items for construction

6 Grab excavator bucket: 3 m³ 3 machines Sand and stone yard 7 Bulldozer 5 machines Leveling ground, work items for

construction 8 Grader 5 machines Factory premises, pipelines 9 Soil compaction machine: 3 - 4 tons

5 machines Factory premises, pipelines

10 Steam crane 5 cranes Factory premises, pipelines 11 Concrete mixer: 250 - 500 liter 5 machines Factory premises, pipelines 12 Self-propelled concrete mixer: 5 - 8

m³ 10 trucks Work items for construction at the

water factory, roads, waste water



No. Kind of construction machines Quantity Construction position, transport pump station

13 Concrete pump 2 machines Work items for construction at the water factory

14 Compaction machine (toad type): 3,3 - 4,5 Hp

10 machines Work items for construction at the water factory, pipelines

15 Vibratory plate compactor + Vibration roller: 3,5 - 7,5 Hp


16 Concrete vibrating compactor: 1,5 - 2,0 KVA


17 Hand held concrete vibrating compactor: 100 - 230 W


18 Concrete vibrating plate compactor: 0,25 - 1,5 kW


19 Floor polish machine: 5 Hp 2 machines Work items for construction at the water factory

20 Concrete cutter: 5 - 7,5 Hp 2 machines The water factory 21 Iron cutter 2 machines The water factory 22 Welding machine: 5 - 10 KVA 3 machines The water factory 23 Generator machine: 200 KVA 1 machines The water factory 24 Generator machine: 50 KVA 4 machines Pipelines 25 Electric- motor water pump

machine: 5 - 10 m³/hr 2 machines Work items for construction at the

water factory, pipelines 26 Diesel-engine water pump machine:

5 - 10 m³/h 4 machines Pipelines

27 Paint spraying machine 2 machines The water factory 28 Other necessary construction

equipments and machines Work items for construction at the

water factory, pipelines The human factor in the process of construction is also considered as The generated source of effect on the environment. A number of participating technicians, workers, engineers … in the high season is planned as below:

Table 6-10. Planned number of main machines for construction

No. Construction team Quantity Construction position 1 Pipeline construction team 1 15 people Pipelines 2 Pipeline construction team 2 15 people Pipelines 3 Pipeline construction team 3 15 people Pipelines 4 Pipeline construction team 4 15 people Pipelines 5 Construction team about work items at

the waste water treatment factory 60 people The waste water treatment

factory Total 120 people

Exhaust fume, dust - The generated source of Exhaust fume, dust in the period of construction are:

Land leveling: Dust from roads fly when the vehicles go across; dust from ground and sand fly in the wind when being transferred and in leveling land. The plan-based leveling land, which has the route from uncultivated land in high hill from Tan Loi Commune to Dong Phu Rural, are 80.000 m³. The soil has been transferred from the suppliers to provincial road TL 741 along to red-stone rural road, then, to pathway in project’s area, and finally to leveling land at the constructive planned area of waste water treatment factory.



Transporting, loading and unloading the materials such as sand, stone, cement, matic … make dust fly in the wind along to roads from expanse, warehouse to construction site; dust from sand, stone, cement when being loaded and unloaded at expanse, warehouse and expanse, warehouse in the construction site. Especially , a maximal number of dust appear when mixing concrete, opening the pack of cement, put the materials into the mixer and making the mixing process.

Exhaust fume from gasoline and diesel engine of the construction machines, electric generators, moving trucks, cars, motorbikes … consists of the components causing the environment pollution such as dust, SO2, NOx, CO, volatile organic compound (VOC)…

The process of construction: dust fly in the wind from the dig soil onto the truck or piled-up soil beside the hole; dust appear when the bricks break by being cut; when using dry cement, when flatting matic; the smell of solvent, paint dust when spraying paint onto the surface of metals, walls…especially dust will be appear so much when drilling and cutting walls, concrete, bricks …, planning and flatting many kinds of wood.

Cooking: cooking with charcoal for a large number of technicians, workers, engineers… also creates Exhaust fume, dust causing the environment pollution.

- According to “Assessment Technique for environment pollution” of World Health Organization (WHO), it can be calculated that each 20-ton truck driving at a average speed of 25 km per hour over 1 km of soil road in dry season will carry 13.5kg of dust.

- The loading of dust pollution of the processes, construction machines in the period of construction is concerned in the below statistic.

Table 6-11 . Loading of dust pollution in the period of construction

No. Construction team Loading of dust pollution (g/m³)

1 Dust from land leveling, being flied up by wind 1,0 - 100,0 2 Dust from loading and unloading the construction materials (soil,

sand, cement, …) 0,1 - 1,0

3 Dust from transporting soil, sand, stone and spilling them on the roads

0,1 - 1,0

Table 6-12 . Loading coefficient of pollution substances of Diesel generator

Loading coefficient of pollution substances (kg/ton of fuel)

No Kind of engine

TSP SO2 NOx CO VOC 1 Diesel generator 0,71 20S 9,62 2,19 0,791

(Source: Assessment of Sources of Air, Water and Land Pollution; Part one; by World Health Organization, Geneva, 1993)

- The loading coefficient of pollution substances from burning the fuel of all kinds of trucks, construction machines, motorbikes, …

Solid wastes - The generated source of solid wastes in the period of construction includes:

Land leveling: spilled soil in the area of land exploitation, road transporting from the suppliers to the planned area of the waste water treatment factory.

Material transporting: sand, stone, … spilled on the road from the suppliers to construction site.

Soil, sand sticking in the wheels of truck when it goes in and out the construction site are spilled on the road.

The work items create the solid wastes as below: o Being spilled of piled-up soil spilled in the construction site, road transporting

to the place where has the demand on land leveling or disposal expanse.



o Being spilled of sand, stone when transporting from material assembled expanse in the construction site to the concrete mixer placed in the work items.

o Being spilled of concrete, cement mortar when concreting, plastering. o Broken bricks, cutting of tile when building. o Scrap iron, wire, solder stick when doing job relating to iron. o Milled wood, spilled driven nails when doing job relating to scaffolding,

framework. o Broken tile when doing job relating to paving floor and sticking on the wall. o Concrete, brick stone when drilling and sawing concrete, brick wall. o The cement paper bags, matic, admixture, plastic paint bucket. o Package, excessive electrical wire, plastic pipe, excessive glue tube when

doing job relating to electricity and water. o Domestic solid wastes of technicians, workers, engineers, … when

participating in building construction. - The amount of solid wastes in the period of construction is very high and it’s up to

worker’s professional skill as well as building method of contractor. The average amount of domestic wastes per person per day and the components of domestic wastes will have been found in the Table above.

Waste water - The generated source of waste water in the period of construction includes:

Sweeping soil and sand of overflow of water when watering the compaction of leveling ground for building the water factory.

Containing cement, soil and sand of wash water when cleaning concrete mixer, excavation and dump equipments, compactors, mason equipments.

Containing cement of concrete maintain water. Waste water for testing the pressure of pipeline. Waste water for trying to carry all kinds of tank. Water for cleaning soil and sand stuck wheels before going out the construction

site. Spraying water for making the bricks wet before building and plastering. Water for chilling saw blade before cutting tile and stone. Containing viscid oil water when repairing and maintaining machine. Domestic waste water from about 120 of technicians, workers, engineers, … in

high execution time. - The dirty component content of domestic waste water per person per day and the

component of domestic waste water are seen in Table above. - The amount of domestic waste water in the period of construction are calculated as

below.

Table 6-13 The amount of domestic waste water in the period of preparing for investment

No. Norm Unit Value 1 Number of technicians, workers, engineers, … Person 120 2 Water standard per person l/person.day 90 3 Average volume of using water per day m³/day 10,8 4 Volume of domestic effluent calculated by 80%

of used water volume m³/day 8,6

Noise - The generated sources of noise in the period of investment and construction are:



The noise of construction machines and equipments as mentioned in Table. section 1.2., specified as below: o Noise of diesel engine when running. o Noise of drilling concrete, brick and stone, cutting iron and steel, … by

machine. o Noise of hammer when working with iron, installing and removing mainframe.

Noise of vehicles: motorbikes, cars of technicians, workers, engineers, … and manager participating in project in the period of construction.

- The maximum level of noise from the operating of the factories is concerned as below:

Table 6-14. The noise of construction machinery during construction

Noise level in 1,0 m distance

No. Kinds of construction machines

Value Feature

Noise level in 20,0 m

distance

Noise level in 50,0 m

distance

1 Bulldozer - 93,0 67,0 59,0 2 Roller 72,0 - 74, 0 73,0 47,0 39,0 3 Excavator bucket 72,0 - 84,0 78,0 52,0 44,0 4 Tractor 77,0 - 96,0 86,5 60,5 52,5 5 Scraper 80,0 - 93,0 86,5 60,5 52,5 6 Paving machine 87,0 - 88,5 87,7 61,7 53,7 7 Truck 82,0 - 94,0 88,0 62,0 54,0 8 Concrete mixer 75,0 - 88,0 81,5 55,5 47,5 9 Mobile crane 76,0 - 87,0 81,5 55,5 47,5 10 Electric generator 72,0 - 82,5 77,2 51,2 43,2 11 Compressor 75,0 - 87,0 81,0 55,0 47,0

(Source: Mackernize, 1985) - A equivalent noise level of vehicle stream is told in Table above.

Source of erosion, landslides, land subsidence During the construction investment time, the source of erosion, landslides, land subsidence include: - The exploitation and excavation in providing land to level will form a deep depression

causes the following: Excavations cliff erosion during construction. A place for gathering water, water volume in the rainy season, rainwater runoff

under the direction of the slope where a depression place cause erosion on water. - Leveling soil is eroded, landslide (especially during the rainy season) if there’s no

measures for drainage, embankments reinforced roof reasonably, it will affect crops and livelihoods of households around.

- The drains are placed in the ground along the roads, at lower depths towards the sluice gates and pumping stations of wastewater. Therefore, the construction placed drainage ditches, pits dug construction of wastewater pumping stations will create landslide phenomena wall excavations, without measures to reinforce walls will affect to: existing background traffic, the categories of public works, the households around. The construction machine located next to ditches, excavations can be absorbed by

the landslide. Press, buried the workers in the trench, digging holes.

- The water tank in the wastewater treatment plant is semi submersible floating, the digging holes construction will cause landslide phenomenon of wall excavations affecting the construction machines, workers and quality works.

- The works in wastewater treatment plants and waste water drainage on line without a large technical solutions to reinforce the foundations and construction methods will be



reasonable causes of land subsidence larger than the allowed limit (8.0 cm) would affect the adjacent works.

Source of the impact of climate change Source may contribute to climate change, make the earth warmer is exhaust fumes causing the greenhouse effect. The rate of gases cause the greenhouse effect as follows:

CO2: 50% CFC: 20% CH4: 16% O3: 8% N2O: 6%

Therefore, the use of construction machines, automobiles, motorcycles, ... gasoline, diesel will make up the gas N2O (in NOx), CH4 (the VOC) that contribute to causing the greenhouse effect global. Heat generated in the process of fuel combustion engines, heat generated during welding steel will contribute to increase air temperature in the construction sector directly affects the health and productivity of technicians, workers, engineers,…

Source of impact of lowering the groundwater level Exploitation ground water drilling well serves water demand for the compacted base, concrete mixer, water maintenance concrete, loading tanks testing water , testing water of the pressure of the drainage line pressure,... Demand for using water for activities, water for construction in the construction phase is calculated as the peak:

Table 6-15. Activities water demand

No Norms Unit Value 1 Number of technical staff, workers,

engineers,... Person 120

2 Water standards for a person l/person.day 90 3 Average water use a day m³/day 10,8

Table 6-16. Construction water demand

No Items Unit Value 1 Compacted base: soil moisture is expected to

add 5% according to experimental results compacted

m³/day 135,0

2 Concrete mixer: Estimated volume of M250 concrete up to 100 m³ / day

m³/day 18,5

3 Testing water of loading tank: use pump Q = 20 m³/h

m³/day 160

4 Testing water of the pressure of the drainage line pressure D400, L = 1.750 m

m³/day 219,8

5 Water for maintenance of concrete, brick moistened, wall plastering: use pump Q = 5 m³/h

m³/day 20,0

6 The above jobs are not done simultaneously. Thus, maximum quantity of exploitation water a day has been calculated according to the largest water use demand , Qday

max

m³/day 219,8

From Table above, they show that the maximum quantity of groundwater expected to exploit in 1 day about 230 m³.



Ground water for construction, building is in the aquifer between the Pliocene () at a depth of 60.0 m, maximum flow 230 m³ / day. The exploitation of groundwater for the project will contribute to the exploitation of underground water of the people causing the phenomenon of lowering water tables, causing ground subsidence.

Source of impacts of biodiversity changes The use of construction machines, automobiles, motorcycles, ... gasoline, diesel will make up the NOx, SO2 with NOx emissions, SO2 generated by other sources from industry, local people ... combined with water vapor in the air will form the acid rain caused irreversible harm to plant and animal. Activities wastewater of technicians, workers, engineers, ... along with urban wastewater of Dong Xoai town Xoai are not thoroughly treated, containing environmental pollutants, particularly nitrogen , Phosphorus is a component cause is the extensive maintenance of water and wastewater BOD components significantly reduce DO levels in streams, destroy self-cleaning ability of natural water sources, forming lines dead streams, causing changes in water biodiversity.

The risks, environmental problems During the construction phase, risks, environmental problems can occur following: The risk of fire or explosion can occur due to gas reserves, oil in storage to cater for the building machine, causing serious harm can not be quantified prior to the air environment, life and health personnel and workers directly working in the site and the people around. Project for drainage and wastewater treatment in Dong Xoai town is construction projects separate drainage systems, including sewer collection and storm water drainage, wastewater collection pipeline activities, treatment plants wastewater. The problem of environmental pollution from flooding, rain water drainage, waste water is very serious, so urgent is the people's concerns that the local authorities over time. So, to ensure the progress of construction works and the whole system is critical to quickly solve the problem of environmental pollution and the consequences that it brings. The risk of environmental pollution will be more serious if the construction progress is delayed from the following main reasons: - Procedures of implementation project is delayed from related parties. - Clearance issues is slow, conflict of interest between the people and projects. - The objection of the people because of land requisition of the temporary construction

and drainage culverts affecting business, trade. - The objection of the people because of environmental pollution caused by construction

process. - Weak management capacity of project management. - Weak capacity of contractors. - Problem of providing funds, disbursements, inflation. - Lack of close cooperation, not agreed between the related parties. And other causes of slow progress, …

Mitigation measures

Exhaust, dust Measures to minimize dust generated from the ground leveling process, transportation of the materials as below: - The tank of truck carrying soil, sand, stone, cement…is cover with canvas and is

checked regularly to ensure that canvas is not broken in the transportation process. - Dust bounces when the truck runs on the red stone road from provincial road TL 741 to

the exploitation land. It does not affect to households because it is rural trails, less of houses, on two sides of the road there are many trees that play a role as isolated buffer.

- Everyday, water the ground leveling area that can minimize dust in the wind rolling affecting to the households in the end of wind direction.



- Building the construction fence with the height of 2,0 m around the water treatment plant area to isolate and minimize the impacts which could affect neighbor households.

To minimize the harmful effects of generated dust when we pour the sand, stone materials at the site; cement is unloaded at the warehouse; mixed concrete in the works, workers are equipped with respirators, glasses. Exhaust fumes, dust is mainly generated in the first period of the construction investment by the construction machines, motorbikes, cars,… (please find the details in the table III.9, part 1.2 of the chapter III) with the low emission load, operation time is in the administrative hours (8 hours/day). QCVN 05:2009/BTNMT - National Technical Regulation on air quality do not limit the value of the basic parameters in the atmosphere around 8 hours in average

for dust, SO2, NOx, VOC with the limited content CO 10.000 µg/m³ . However, to ensure the safety for the air during the research process, it needs to implement detailed measures as below: - Cars, trucks: use brand names Mitsubishi, Hyundai, Hino,… who has complied the

emission standard, with the life 5 years, has been certificated to allow the circulation that ensures the environment safety. Technical requirement content, environment safety to cars, trucks is reflected in bidding documents and is assessed as a capacity standard.

- Construction machines: use brand name such as Mitsubishi, Hino, Komatsu, Kobe, Yamaha, Honda,…. which is produced to comply the emission standard, with the life 5 years, certificated in quality so they ensure the environment safety. Technical requirement content, environment safety to cars, trucks is reflected in bidding documents and is assessed as a capacity standard.

- Motorbikes: use brand names Honda, Yamaha… with the life 5 years or with the speedometer 60.000 km. These are the products of motorbike manufacturers which comply the emission standard, ensure the environment safety during the operation. Moreover, the quantity of motorbikes used for the research process is small so the generated emissions load is very low, the natural environment can sufficiently bear to this.

- Regularly check the machines, avoiding the breaking down and performance the maintenance promptly

Food preparation for the technician, workers, engineers,… in the work will not create the exhaust which causes the environment pollution because used fuel is liquefied gases.

Solid waste Soil, sand, stone, ... fell in transit is minimized by covering the tank and is regularly checked to ensure no canvas torn, that scatters soil, sand, stone, ... in the transportation process To the trucks, before get out of the work, they need to be cleaned mud, soil on the wheels. Ditch digging land to make the drain, digging holes of wastewater pumping stations is clean on truck. Soil, sand, stone, concrete,...in the water sewer line is limited by the scattered outside the construction fence exalted 2.0 m. For debris generated during the construction process: organizing sanitation teams who perform the work of clearing, cleaning, contact the Public Enterprise for debris collection and burial or sell to where debris needs to use, but must ensure environmental hygiene, do not scatter in transit. Garbage activities of technicians, workers, engineers ... involved construction will be collected in plastic garbage cans, contact the Public Enterprise to be collected and buried the hygieneically.

Solid waste management plan The most generated solid waste volume in construction stage is from the residual soil of founding excavation for the construction of drainage line with the volume of 46.755 m³. The volume of soil for aggrading the layout plan of the treatment plant is 50.000 m³. This residual soils (46.755 m³), is transported to the plant’s plan to aggrandizement and need to exploit 3.245 m³ from the adjacent soil blank.



The transportation process as follows: - From the construction site of the drainage system line to the site of treatment plant: Ditch for drainage sewer excavation load to the truck seal the truck transfer to the treatment plant water the soil road (if needed) aggrade water-wash the wheels before leaving the site on the way to drainage sewer line construction (proceed). - From the soil bank to the site of treatment plant: Soil bank excavation load to the truck seal the truck water-wash the wheels before leaving the site on the way to the treatment plant site water the soil road (if needed) aggrade water-wash the wheels before leaving the site on the way to soil bank(proceed).

Waste water The amount of irrigation water on leveling ground of the water plant is estimated to add enough water to ensure the optimal number is compacted so no extra water under his land, sand flow out of the area. For the water to wash concrete mixers, a bricklayer of equipment, maintenance of concrete, water to moisten bricks, cooling water when cutting brick, water to wash the wheels which are sticked with mud before leaving the construction site and types of waste water generated during other construction work, ... is temporarily collected by sewerage system during construction in lake sediments , removing the scum floating before exiting Dakrip stream Load testing of the water tank, pressure testing water lines and drainage of underground water pressure is good quality, after using it contains a very small amount of dirt, inorganic residues should be discharged directly into Dakrip stream. Wastewater of technicians, workers, engineers, ... of about 120 people at peak time with a total volume of about 8.6 m³ / day was the preliminary treated in septic tanks of portable toilets located in the neighboring farms to reduce environmental impacts.

Noise Noise arising mainly in the construction phase from construction machinery, automobiles, motorcycles, ... (see table number. Chapter III, section 1.2) as described in Section 1.2.1, this is the product products of firms in advanced countries are produced by noise standards so the noise level is limited, without affecting residential areas. However, for workers directly working with construction machinery, long-term exposure will have certain influence. Therefore, it should implement measures to minimize adverse effects, specifically as below: Equip for workers ear protection equipments. The construction machines which cause big noises are not allowed to continuously work, stop working 2-3 times/shift, 10-15 minutes/ time. Rotate workers in the operation construction which has large and small noises Regularly check the machines, avoiding the breaking down and performance the maintenance promptly. Rain water runoff Rain water runoff is collected by the sewerage system temporarily during construction to avoid problems of runoff from construction areas, causing erosion, avoid problems of flooding, stagnant water in construction site. Rain water in the holes, digging drainage ditches is pumped for discharge into streams, existing drainage ditch which is near a construction area or completed sewer line construction. Erosion, landslides, land subsidence Digging land which is provided for ground leveling is good quality land with the natural weight capacity of γ 18,5 kN/m³, compressive strength of qu 50 kN/m²; so the holes can be digged under the wall with vertical maximum depth of 2.7 m. For deeper depths, the implementation of digging bevelled roof slopes 1:2 or reinforced with old steel walls is to avoid landslides wall excavations.



The land of ground leveling with the height of 2.0 was designed and constructed under roof slopes 1:2 to ensure stability for the roof, do not cause landslide phenomena, sliding roof cover. The re-established,road return, the existing pavement is done according to design, compacting rollers ensure the tightness k 0,95 and the results before testing to avoid the phenomenon of subsidence, falling after construction. The works of the project is in the big load so the preparation of investment, the unit has done consulting work of geological survey works for full mechanical and physical indicators of soil background as the basis for calculating foundation works during the construction drawing design, ensuring settlement of the works are in permissible limits as prescribed 8,0 cm. During the period of construction, settlement of the work is always monitored by the monitoring measures to be timely when necessary

The phenomenon of climate change The gas generated during the construction project is more significant, contributing to the greenhouse effect, however, as described in Section 1.2.1, they are within permitted limits , bearing capacity of the environment is capable of receiving. Heat generated by the construction machinery will increase the temperature of the region where the machines are installed, however, manufacturers have been calculated and put fuel combustion away from the operator, are cooling, cooling fan or natural wind in order to ensure that engine performance is optimized. Moreover, the construction machines work mostly outdoors so that heat is diffused immediately into the air, does not significantly affect the operation of workers working in the cabin. The heat generated from welding work appears only in narrow range, and impact to the local plumber. To minimize the thermal impact to health, fitted with welding mask, gloves, protective clothing for welders working. Phenomenon of lowering underground water levels Groundwater exploitation for the construction phase with a maximum flow of about 230 m³ / day, this amount of water was much smaller (2.2%) compared to mining potential reserves 10,417 m³ / day of Dong Xoai town. Moreover, region of Dong Xoai town, most of water demand of households supplied by surface water in Suoi Cam lake is handled in water plant in Dong Xoai, so only a small fraction of households who are located far from water supply area can use underground water . Therefore, the exploitation of groundwater for construction is associated with the exploitation of underground water which is exploited everyday of the residents can not be higher than potential reserves so the phenomenon of lowering underground water level can not be occurred in this stage.

Social Publish about the project, construction contractor and the implementation rate via mass communication such as news, radio for people to gain info about the project, avoid the panic, suspicion in the people. Put barrier to isolate the construction site to prevent the impacts of the construction task to the people. Inform the people about the construction plan on the drainage line, for them to have suitable traffic directions, prevent traffic jams. Install warning signs, organize to divide the traffic lane rationally, avoid traffic jams, traffic accident when constructing on the drainage line. Inventory, compensate adequately for the obstruction, affection to business households during the drainage construction process. Implement the construction measure rationally, precisely to the design to void the falling of the digging hole’s edge, which affects to people’s houses. Organize the implementation on schedule; render soon the clear area in front of the people’s houses soon. Register for temporary residence for individuals participating implementation task that stay on site or hostels, hotels to ensure the security and order as regulations.



Implement well the environment management and monitoring task during the implementation in order to mitigate maximum negative affects to the people. Promptly solve conflicts, listen to positive recommendations of the people during the implementation. Ensure the labor safety, fire and explosion prevention.

3. Operation management period Impact Exhaust fume, Dust - The generated source of exhaust, dust, smell in the period of operative management are:

Smell of domestic waste water in manholes, waste water pump station. Smell of domestic waste water in waste water treatment factory with work items:

concentrated collecting pit, water ditch, grit basin Pista, compartment distribution. Smell of sludge when dredging manhole, pump station on pipeline; smell of sludge

in sludge consolidation tank, sludge compactor in waste water treatment factory. Generated CH4, CO2 during biological treatment in oxidation ditch. Using steam Chlorine to disinfect waste water after the home treatment for

chemicals. Gasoline and diesel exhaust fume of machines and equipments served for

operating and maintaining pipeline system such as sludge moving truck, sewer cleaning vehicle, loading machine, electric generator, motorbike, … containing the components causing air pollution as dust, SO2, NOx, CFO, Volatile organic compound (VOC),…

Table 6-17. Number of machinem equipment for operating, maintaining pipeline system

No. Norm Unit Value 1 Portable waste water pump Machine 2 2 Loading machine (combining shoveling and

bulldozing) Machine 1

3 Dredging machine Truck 1 4 Sewer cleaning vehicle Truck 1 5 Sludge moving truck Truck 1 6 Electric generator Machine 1 - The loading coefficient of pollution substances from fuel combustion of gasoline and

diesel engine is concerned in Table abve.

Solid waste - The generated source of solid waste in the period of project operating management

includes: Dredging sludge in manholes, waste water pump station and home septic tank. Dredging sludge in waste water treatment tank in the factory as concentrated

collecting pit, water ditch, grit basin Pista, compartment distribution, oxidation ditch, grit basin II, disinfection basin, scum collection basin, sludge collecting basin, sludge compaction basin.

Sand trap in grit basin Pista. Generated sludge during biological treatment has been deposited in grit basin II,

sludge collecting basin and has been compacted into drying of sludge cake by sludge compactor.

Kinds of large-sized rubbish will be held at garbage blocker of water ditch. Domestic waste from staffs in managing the operation of drainage system in Dong

Xoai Town.



- The average amount of domestic waste per person per day and the components of domestic waste are listed in Table abve.

Waste water - In the period of project’s operating management, the source of waste water are:

Waste water of home septic tank into waste water collection pipeline. Water in lime sludge of dredging. Waste water after the factory treatment, flow Q = 10.000 m³/day into the receive

source - Dakrip canal. Water from compacting sludge. Periodically brass water tank. Waste water from staffs in managing the operation of drainage system and waste

water treatment in Dong Xoai Town. - The amount of dirty substances in domestic waste water per person per day and the

components of domestic waste water are concerned in Table abve. - The amount of dirty substances in domestic waste water caused by septic tank is below:

Table 6-18. Amount of dirty substances in domestic waste water caused by septic tank

No. Ingredients Unit Value 1 BOD5 mg/l 150 - 250 2 COD mg/l 250 - 500 3 Dry solid SS mg/l 40 - 140 4 Amonia mgN/l 30 - 50 5 N - organic mgN/l 20 - 40 6 Total phosphorus mgP/l 12 - 20 7 Oil and grease mg/l 10 - 50

(Source: Giáo trình xử lý nước thải, TS. Nguyễn Phước Dân, Khoa Môi trường, Đại học Bách khoa Tp. HCM, 2004)

Noise - Sources of noise during operation management period include:

Noise from machinery, operation equipment during the operation process as described in Table abve.

Noise from the vehicles as motorcycles, cars of the personnel who manage and operate the drainage system.

- Maximum noise level from operation of construction machine during construction process is calculated as follows:

Table 6-19. The noise of construction machinery in operation phase

1,0m distance from noise and source

No Construction machine types

Value Typical



1 Loaders machine (two features combine contact and comfort)

72,0 - 84,0 78,0 52,0 44,0

2 Transporting peat trucks , pressure sewer cleaning vehicles, dredgers septic air

82,0 - 94,0 88,0 62,0 54,0

3 Generators 72,0 - 82,5 77,2 51,2 43,2



(Source: Mackernize, 1985) - Equivalent noise level from car types view Table abve.

Source of erosion, landslides, land subsidence During project operation phase, the source of erosion, landslides, land subsidence, including: - The collection of amount of rainwater Qmax = 2.54 m / s from the most heavy rain

discharge into Suoi Cam may cause erosion at outlet position, combined with the natural flow of the stream flow is formed great speed, causing erosion, landslide on stream water.

- The amount of water after treatment is discharged into the receiving channel Dakrip in wastewater treatment plants with a flow of 0.12 m³ / s (10,000 m³ / day) can cause erosion at the outlet position, combined with natural flow of streams forming a speed of flow, causing erosion, landslide on stream water.

- The works of the project after completing the settlement process to continue settlement limits. Settlement may exceed the permissible limits (8.0 cm) would cause serious impact to the surrounding works, especially the works of the population on sewer lines, particularly, the re-establishing drainage ditches located not ensure technical and design requirements will appear the phenomenon of subsidence, forming the fold, rugged, and even drive cause chickens in city, obstructing traffic.

Source of the impact of climate change Similar the construction phase, in the project operation phase, the source may contribute to climate change because, as the earth is warming emissions causing the greenhouse effect from the use of machinery, equipment and gasoline engines, diesel. However, the operation of machinery and equipment that are not regularly and continuously in a short time when dredging manholes, septic tanks dredgers and run backup generators in case of power outage from National grid.

Source of impact to lower the water table This is the project of drainage and wastewater treatment in the process, so in the operation process, the project doesn't exploit the underground water resources. Clean water for the daily needs of personnel who manage, operate and brass cleaning machines, equipment, tanks, ... is supplied from water supply systems of Dong Xoai Town. So in the operation phase, the project does not impact the phenomenon down to the underground water level.

Source of impacts of biodiversity changes The project drainage and wastewater treatment in Dong Xoai town is a significant project on environmental hygiene, solve problems flooding, urban drainage, waste water treatment achieve environmental regulation before discharging into the receiving source. So the project has contributed to maintain the biodiversity of natural ecosystems project area, creating a healthy living environment, clean, ensuring the health of residents.

Mitigation measures Exhaust, dust, bad odour Bad odour of domestic waste water rises from manholes, sewage pumping stations is to minimize the impact on surrounding households and pedestrians by designing and installating the manhole lid to prevent bad odors Odor of wastewater at the collection pits in the plant is inevitable but odour content is not too serious and only affect to workers who work directly in the operation. Odor mitigation is as below:

Respirator equipment for workers who work directly in the operation of construction works where there are bad odours.

Supplement to the waste water solution deodorizer The bad odour from the sludge of dredging manholes, septic tanks only directs impact on construction workers or local residents of the area surrounding the construction area. Measures to minimize impacts include::



Respirator equipment for workers who work directly in manhole dredging, cesspool smoking.

Inform to residents about the dredging plan that helps them prevent such wearing respirators or avoiding going through the construction area.

Dredged sludge , pumping the tank which has been sealed. Conducting dredging at peak traffic hours to minimize the impacts on pedestrian.

- Exhaust , dust is mainly genereated in the operation management period from the construction machines, equipments which are used for dredging, pumping works, generators, motorbikes of the person who manages the operation with the low emission load, operation time is in the administrative hours (8 hours/day). QCVN 05:2009/BTNMT - National Technical Regulation on air quality do not limit the value of the basic parameters in the atmosphere around 8 hours in average for dust, SO2, NOx, VOC with the limited content CO 10.000 µg/m³ . However, to ensure the safety for the air during the research process, it needs to implement detailed measures as below: + The machinery, equipment and dredging, pumping, using products of advanced

countries, are produced in compliance with emissions standards to ensure environmental safety. The machinery and equipment which are completely new products is offered for the project through bidding that provides equipments for proper operation and drainage system. Technical requirement content, environment safety are expressed in bidding documents and is assessed as a capacity standard.

Motorbikes: use brand names Honda, Yamaha… with the life 5 years or with the speedometer 60.000 km. These are the products of motorbike manufacturers which comply the emission standard, ensure the environment safety during the operation.

Regularly check the machines, avoiding the breaking down and performance the maintenance promptly

For Chlorine gas: workers who work directly with the chemical is equipped with labor protection, gas masks, oxygen tanks, outside the office we install the shower faucet to the shower in case there is leakage of chlorine. It is to ensure health and safety for workers. Inside the room, arrange the exhaust fans to ensure ventilation, minimize chlorine gas generated.

Solid waste Dredged sludge periodically 2-3 years once in manholes, sewage pumping stations; 4-5 year / time for household septic tanks is collected by road tankers and sludge generated constant pressure day at the wastewater treatment plant is further processed by micro-technology in waste treatment plant with a capacity Xoai 200 tons per day by the Corporation for Investment and Development of Environmental Technology Management Binh Phuoc operated through management contracts. Sand is settled down in sand sediment tank Pista, trash in the ditch water, domestic waste of officers and employees of the management and operation of wastewater treatment plants were collected on the spot in the tank, trash. Contact the Public Enterprise to be transported to the waste treatment plant Xoai.

Solid waste management plan - Manhole dredging: Manhole suck, dredge spray odor-killer chemicals (if needed) load o the trunk seal the cap on the way to Dong Xoai waste treatment plant pour into the dewatering tank ( slurry process line) on the way to manhole dredging site (proceed). - Septic tank absorption: Septic tank absorption spray odor-killer chemicals (if needed) load o the trunk seal the cap on the way to Dong Xoai waste treatment plant pour into the dewatering tank ( slurry process line ) on the way to septic tank dredging site (proceed).



- Biological lake dredging : Bio-lake Drain water of 01 compartment absorb. dredge spray odor-killer chemicals (if needed) load o the trunk seal the cap on the way to Dong Xoai waste treatment plant pour into the dewatering tank ( slurry process line) on the way to bio-lake dredging site (proceed).

Noise For waste water pumps, the turbines stir wing is immersed in water so very little noise generated, not affecting to the working workers . Electricity supply to wastewater treatment plants is national grid from two different sources, ensuring the power 24/24, however, backup generators can operate in case of unexpected incidents causing power outages. Thus, during operation management system of drainage, noise mainly comes from the operation of machinery and equipment for the dredging and cesspool smoking. The number of machines and equipment, motorcycles, ... to serve the dredging and cesspool smoking ( see the table. Chapter III, Section 1.3.1), for the noise level, see the table Chapter III, Section 2.3.1 and as described in Section 1.3.1, machinery and equipment is the product of the advanced countries that are produced with the standards so the noise is limited. However, for directly employed workers, long-term exposure will have certain influence.Therefore, it should implement measures to minimize adverse impacts, as below: Equip for workers the ear protection equipments. Execution of dredging during administrative hours but avoiding peak hours. Informing people about the dredging plan. Frequently check machines, prevent problems and maintain promptly.

Flow-over rain water Rain water flow-over in the plant area shall be gathered by internal rain water drainage system, out to Daktip spring.

Erosion, subsidence, land slide The rain water discharge gate constructed at Cam spring bank, the cross-cut has width of 6.0m and depth of 2.0m, 100.0m away from Cam Spring Lake, thus competent to conditioning a volume of rain water Qmax = 2,54 m³/s without erosion, land-slide. The waste water discharge gate constructed at Dakrip spring bank, the cross-cut has width of 3.0 m, depth of 1.5 m and 500,0 m away from the downstream- where the cross cut has width of 8.0 m, depth of 2.0 m , thus competent to conditioning a volume of active current water 0,12 m³/s (10.000 m³/day) without erosion, land-slide. In the management operation stage, the work items shall be continuously observed to monitor the subsidence to propose treating measures promptly. Social Propagate, educate about the awareness of environment protection for the community via mass communication such as news and radio. Encourage people to participate in the connection into the drainage system, build detritus pit. Manage the implementation effectively of treatment system, frequently check, dredge drainage sewers, manholes, exhaust the septic tank periodically to prevent submergence and blocking. Establish the hotline; give out solving measure timely for the blocking, submergence when there is report from people. Implement well the environment management and monitoring task during the implementation in order to mitigate maximum negative affects to the people. Ensure the labor safety, fire and explosion prevention. Organize for management staff to attend training classes to improve the proficiency, management experience of the drainage and waste water treatment system.



ENVIRONMENTALTROUBLE Environmental risks, problems of the drainage and waste water treatment of Dong Xoai Town project may occur during investment construction and management operation stage. The response measures are proposed as follow:

Investment construction - Fire, explosion prevention:

Comply current regulations of law about fire, explosion prevention.. Locate gas storage distant to the flame, heat source, safe quarantine to site huts,

work items. Signs of no flame at gas storage. Gear up, water pumper, fire extinguisher. Ensure the storage is open. Gas must be stored in fire-proof, break-proof barrel, holder. Train fire prevention and extinguishment for the construction staff.

- Labor-construction safety: Comply current regulations of law about labour safety. . Gear up labor safety items for the construction staff. Safety sign on high and under digging-hole. Comply closely the proposed construction measure.. To the drainage-line: put barrier to isolate to construction site, with signs, divide

traffic lanes. To high density traffic lanes, implement construction at night to mitigate the minimum affects to the people.

Train the labour safety for the construction staff. - Drainage and waste water treatment project in Dong Xoai town is the project that solves

water environment pollution; meaningful to the public service demand about the clean, pure living environment; contributes to boost the socio-economic development when gradually improves the infrastructure. The drainage and waste water treatment is pressing issue of the people and local authority for the past time. Therefore, this project is supported by levels of authority, local people in administrative procedures, clearance task:

- The construction rate is ensured by the following conditions: The human resource of the PMU is staff, engineers with certificate, competence

and experience in project management task of Binh Phuoc Water Supply & Drainage Co.Ltd, as the employer.

The staff of the PMU will be trained, supported technically during the project implementation from the component Technical support of the project.

The contractors are selected by the criteria on technical and financial competence as the regulations of biding of the WB and suits with Vietnam regulations.

The capital for the project is the signed ODA fund of the WB and the counterpart fund of the GOV.

The concerned organizations, units must coordinate closely, solve the problems during the implementation stage..

Management operation stage - Ensure the fire-explosion prevention for gas storage and electric generator. - Implement manhole dredging, cleanse sludge periodically to prevent the blockage,

submergence. - Waste water pumping stations on the drainage line, centralized gathering hole in the

plant have been designed the drainage pipeline to rain water manholes, Dakrip spring in case of power-cut or overload to prevent submergence, loss of urban landscape..



- Frequently examine the waste water quality of manufacturing facilities, centralized discharge locations before discharging to the general drainage system to ensure the intake waste water quality not fluctuate much, affect to the treatment efficiency.

- Frequently check, maintain periodically the pumpers ton mitigate unexpected defects. - Chlorine disinfection is calculated to reserve for 40 days. Select the competent and

credit supplier (as ranks), contact and order in advance to ensure the Chlorine volume for disinfection and time to treat incase of no order.

- Technology is selected to apply: this is the populated and effective domestic waste water treatment technology in Vietnam, the treated water quality is qualified, can suffer shock about the intake-load, the operation procedure is simple..

- The connection to the drainage is supported by the people, presented in Socio-economic survey report.

- The cost of operating the drainage system is ensured by drainage charges from the people through clean water consumption price.

- The used Chlorine is industrial Chlorine stored highly safe bottles which manufactured in compliance with safety standards. Install the Chlorine concentration indicator to warn when the concentration exceeds the allowed limit to propose response measures promptly.



Table 6-20. Recapitulation of impacts and mitigation measures

The affect level of the impact Project Activities

Environmental impact

Social impact Mitigate measures Time Space Frequency Chance

Investment preparation stage - Loss of houses,

lands. - Loss of the stability of life, income.

- Calculate the necessary work items need to be allocated for the revoked area is minimum. - Perpend, coordinate with the local to choose the suitable plant construction site, the impact to the people is min. - Publicly claim the project as well as compensation plan, support and resettlement for the people, encourage, and propagate to gain the consensus, support of the people. - Implement properly, adequately the policies compensation, support and resettlement for the people as formulated; create the equality, not deprivation for the PAPs. - Establish the steering committee, implement site clearance and resettlement plan, and timely solve claims, inquiries of people. - Ensure to complete the resettlement before proceeding acquisition, site clearance.

High Low Low High land acquisition, site clearance and resettlement

- Air, noise pollution of saw claiming plants. - Solid waste pollution by claimed plants.

- Using saw, cutter from developed countries manufactured in accordance to environment safety standard, with valid depreciation - Clear up claimed plants, contact the Public Work Enterprise for sanitary land-filled.

Low Low Low Low

Propagate project info to the community

People got the info and benefit from the project; thus consent, support the project

Beneficial Impact Topography, geology, socio-economic survey

Air pollution, noise from the test driller.

Using driller developed countries manufactured in accordance to environment safety standard, with valid depreciation

Low Low Low Low

Construction stage Wastewater treatment plant Build up fence Set up fence High 2m surrounding the site to isolate and reduce socio-

environmental impact may happen. Beneficial Impact

Hold commencement ceremony


People got the info and benefit from the project; thus consent, support the project.

Beneficial Impact

Recruit worker Solve job issues at the local

Beneficial Impact

Gather workers at huts

Local disorder, security

- Register temporary residence with local police for worker at the site, or inn as regulation.

High Low Low Low






- Organize worker to live, function in orderly fashioned, in harmony with local people.

Generate wastes: domestic wastewater, trash from activities

- Treat preliminarily with domestic wastewater by septic tank of mobile toilet at huts to reduce environmental impacts. - Collect domestic garbage by plastic bin; contact Public Work Enterprise for sanitary land-fill...

High Low Average Average

aggrandizement - Noise, exhaust from construction machine. - Dust, soil along the transportation. - Dust of red soil road. - Flown over rainwater sweeping soil, rock. - Dust in the air during aggrandizement.

Affect to surrounding people and workers.

- Using construction machine from developed countries manufactured in accordance to environment safety standard, with valid depreciation and frequently check, maintain. - Using a membrane to tightly cover the truck load and check. - Watering red soil road if needed. - Watering the aggrandizement plan, set up tole construction fence around the site Height 2m; construction plan away from the residential area, at the end of the wind direction not affect people...

Average Low Low Low

Transportation of material into the site

- Noise, exhaust of trucks. - Pollution of dust, solid waste by scattered sand and rock... - Dust of red soil road. - Sludge attached to the wheel.

Sabotage the urban landscape

- Using trucks from developed countries manufactured in accordance to environment safety standard, with valid depreciation and frequently check, maintain. - Using a membrane to tightly cover the truck load and check. - Watering red soil road if needed. - Water-wash the sludge from the wheel.

Average Low Low Low

Load, unload materials in the site

Generate dust Equip personal mask, Equip labor protection for workers Low Low Low Average

Land excavation for anaerobic lake, casual lake, foundation pit of work items

- Exhaust, noise from machine. - Soil, dust.

- Using construction machine from developed countries manufactured in accordance to environment safety standard, with valid depreciation and frequently check, maintain. - Equip labor protection for workers; circulate workers directly contact with noise. - Excavated soil is clay, will be used for aggrandizement and grading,

Average Low Low Low

Steel, formwork - Noise. - Temperature from steel wielding.

Equip labor protection for workers. Low Low Low Low






Concrete placement, mixing,

- Exhaust, noise. - Dust, cement, sand, rock. - Scatter concrete, left-overs... - Wash water.

- Using concrete mixer from developed countries manufactured in accordance to environment safety standard, with valid depreciation and frequently check, maintain. - Equip personal mask, Equip labor protection for workers. - Collect, settle wash water in sedimentation lake before discharging to Dakrip. - Sanitize, clear up the site, contact Public Work Enterprise for sanitary collection, landfill...

Low Low Low Low

Concrete maintenance

Maintenance water Collect sediment maintenance water in the sedimentation lake before discharging to Dakrip.

Low Low Low Low

Over flown rain water

- Swept rock, sand to obstruct the flow. - subsidence of excavated pit roof, slope roof of the ground.

Dig Ditch installing temporary drainage pipe for the construction Low Low Low Low

Drainage line Build up fence - Restrain trade and

business of households. - Obstuct travel of people. - sabotage the urban landscape.

- Set up fence High 2m surrounding the site to isolate and reduce socio-environmental impact may happen. - Public claim of the project. - Propagate and encourage to gain the consent, support of the people. - Inform the time and construction progress for preparation of the people. - Construct completely, as schedule. - Distribute the traffic routes rationally. - Construct at night. - Solve timely claims of people.

Average Low Average Average


- Noise, exhaust of trucks. - Pollution of scattered dust, soil, rock.


- Using trucks from developed countries manufactured in accordance to environment safety standard, with valid depreciation and frequently check, maintain. - Using a membrane to tightly cover the truck load and check.

Average Low Low Low


Generate dust Equip personal mask, Equip labor protection for workers Low Low Low Average

Foundation pit - Exhaust, noise from - Using machine from developed countries manufactured in accordance to Average Low Low Low






excavation for drainage line construction

machine. - Excavated soil, dust.

environment safety standard, with valid depreciation and frequently check, maintain. - Equip labor protection for workers; circulate workers contact with the noise. - Excavated soil is clay, transported to aggrandizement site, support grading the treatment plant. - Using a membrane to tightly cover the truck load and check. - Site’s fence 2m high isolates and prevents leftovers scattering outside...

Subsidence of excavated pit roof

- Endanger workers under the excavated pit. - House subsidence of adjacent people.

Take topography survey, design relevant excavated roof... Low Low Low Low


Equip labor protection for workers. Low Low Low Low

Concrete placement, mixing

- Exhaust, noise. - Dust, cement, sand, rock. - Scatter concrete, left-overs... - Wash water.

- Using concrete mixer from developed countries manufactured in accordance to environment safety standard, with valid depreciation and frequently check, maintain. - Equip personal mask, Equip labor protection for workers. - Drain wash-water to drainage manhole on the line. - Sanitize, clear up the site, contact Public Work Enterprise for sanitary collection, landfill...

Low Low Low Low


Concrete Wash water maintenance

Drain concrete water maintenance to drainage manhole on the line.

Low Low Low Low

Operation stage Operation of the wastewater pumping station

Noise, bad odor Urban landscape - Pumper is counter-setting deep in the water; the pumping station is countersunk setting under the ground so the noise is very small and hardly hearable. - Countersunk pumper is the product of developed countries manufactured accordance to environment safety standard, frequently check, maintenance. - The pumping station is countersunk setting under the ground, sealed with BTCT cap to prevent odor, for maintenance, open the cap and spray odor-killer.

Low Low Low Low

Collection and treatment of

Wastewater, bad odor Urban landscape - Collect urban wastewater with capacity 10.000 m³/day by pipeline and manhole preventing bad odor.

High High Low Low






urban wastewater

- Treated wastewater at the plant by bio-lake and antiseptic works comply with QCVN 14:2008/BTNMT - Column B before discharging to receiving source Dakrip. - Contribute in the resolution of environment pollution, bring clean, green habitat for people and boost the socio-economic development.

Dredge sludge of manhole, septic tank, bio-lake

Solid waste, bad odor Urban landscape - Spray odor-killer chemicals. - Load sludge to the truck, seal the cap and transport to Dong Xoai Waste treatment to process sludge.

Average Low Low Low

Leaking Clo gas Air pollution, sabotage the health of workers

- Using the Industrial Clo Tank therefore the safety is ensured. - Equip anti-poison mask, cylinder and protection suit. - Allocate the wash-water faucet for whole body of workers incase of Clo gas leaking.

Low Low Low Low



VII. ENVIRONMENTAL MANAGEMENT PLAN AND MONITORING ENVIRONMENT 1. Environment management plan

Table 7-1. Environment management plan (EMP)

Activities of the project

Environment impact Social impact Mitigation measure Duty Monitor Capital source

Investment preparation stage - Loss of houses,

lands. - Loss of the stability of life, income.

- Calculate the necessary work items need to be allocated for the revoked area is minimum. - Perpend, coordinate with the local to choose the suitable plant construction site, the impact to the people is min. - Publicly claim the project as well as compensation plan, support and resettlement for the people, encourage, propagate to gain the consensus, support of the people. - Implement properly, adequately the policies compensation, support and resettlement for the people as formulated, create the equality, not deprivation for the PAPs. - Establish the steering committee, implement site clearance and resettlement plan, timely solve claims, inquiries of people. - Ensure to complete the resettlement before proceeding acquisition, site clearance.

-Employer. - Site clearance, compensation and resettlement board. - Local Government.

- Bureau of R&E of Dong Xoai Town. - Independent monitoring for safety. - Community’s representative. - WB.

Compensation, clearance and resettlement cost

land acquisition, site clearance and resettlement

- Air, noise pollution of saw claiming plants. - Solid waste pollution by claimed plants.

- Using saw, cutter from developed countries manufactured in accordance to environment safety standard, with valid depreciation - Clear up claimed plants, contact the Public Work Enterprise for sanitary land-filled.

-Employer. - Site clearance, compensation and resettlement board. - Local Government.

- Bureau of R&E of Dong Xoai Town. - Independent monitoring for safety.

Compensation, clearance and resettlement cost


People got the info and benefit from the project; thus consent, support the project

- Survey Consultant. - Local Government.

-Employer.

Socio-economic survey cost

Topography, geology, socio-economic survey

Air pollution, noise from the test driller.

Using driller developed countries manufactured in accordance to environment safety standard, with valid depreciation

- Survey Consultant.

-Employer.

Construction survey cost

Construction stage





Wastewater treatment plant Build up fence Set up fence High 2m surrounding the site to isolate and reduce

socio-environmental impact may happen. Contractor - Construction

monitor. - Independent monitoring for safety. - Bureau of R&E.

Construction cost.

Hold commencement ceremony


People got the info and benefit from the project; thus consent, support the project.

- Employer. - Local Government.

- Independent monitoring for safety. - WB.

Management cost.

Recruit worker Solve job issues at the local

Contractor - Employer. - Independent monitoring for safety.

Construction cost.

Local disorder, security

- Register temporary residence with local police for worker at the site, or inn as regulation. - Organize worker to live, function in orderly fashioned, in harmony with local people.

- Contractor - Local Government.

Independent monitoring for safety.

Construction cost.

Gather workers at huts

Generate wastes: domestic wastewater, trash from activities

- Treat preliminarily with domestic wastewater by septic tank of mobile toilet at huts to reduce environmental impacts. - Collect domestic garbage by plastic bin; contact Public Work Enterprise for sanitary land-fill.

Contractor - Employer. - Construction monitor. - Independent monitoring for safety. - Bureau of R&E. - Community’s representative. - WB

Construction cost.

aggrandizement - Noise, exhaust from construction machine. - Dust, soil along the transportation. - Dust of red soil road. - Flown over rainwater

Affect to surrounding people and workers.

- Using construction machine from developed countries manufactured in accordance to environment safety standard, with valid depreciation and frequently check, maintain. - Using a membrane to tightly cover the truck load and check. - Watering red soil road if needed. - Watering the aggrandizement plan, set up tole construction

Contractor - Employer. - Construction monitor. - Independent monitoring for safety.

Construction cost.





sweeping soil, rock. - Dust in the air during aggrandizement.

fence around the site Height 2m; construction plan away from the residential area, at the end of the wind direction not affect people.

- Bureau of R&E. - Community’s representative. - WB


- Noise, exhaust of trucks. - Pollution of dust, solid waste by scattered sand and rock. - Dust of red soil road. - Sludge attached to the wheel.


- Using trucks from developed countries manufactured in accordance to environment safety standard, with valid depreciation and frequently check, maintain. - Using a membrane to tightly cover the truck load and check. - Watering red soil road if needed. - Water-wash the sludge from the wheel.


Construction cost.


Generate dust Equip personal mask, Equip labor protection for workers Contractor - Employer. - Construction monitor. - Independent monitoring for safety. - Bureau of R&E. - Community’s representative. - WB

Construction cost.

Land excavation for anaerobic lake, casual lake, foundation pit of work items

- Exhaust, noise from machine. - Soil, dust.

- Using construction machine from developed countries manufactured in accordance to environment safety standard, with valid depreciation and frequently check, maintain. - Equip labor protection for workers; circulate workers directly contact with noise. - Excavated soil is clay, will be used for aggrandizement and grading,


Construction cost.

Steel, formwork - Noise. - Temperature from

Equip labor protection for workers. Contractor - Employer. - Construction

Construction cost.





steel wielding. monitor. - Independent monitoring for safety. - Bureau of R&E. - Community’s representative. - WB

Concrete placement, mixing,

- Exhaust, noise. - Dust, cement, sand, rock. - Scatter concrete, left-overs. - Wash water.

- Using concrete mixer from developed countries manufactured in accordance to environment safety standard, with valid depreciation and frequently check, maintain. - Equip personal mask, Equip labor protection for workers. - Collect, settle wash water in sedimentation lake before discharging to Dakrip. - Sanitize, clear up the site, contact Public Work Enterprise for sanitary collection, and landfill.

Contractor - Employer. - Construction monitor. - Independent monitoring for safety. - Community’s representative. - WB

Construction cost.


Maintenance water Collect, sediment maintenance water in the sedimentation lake before discharging to Dakrip.

Contractor - Employer. - Construction monitor. - Independent monitoring for safety. - Community’s representative. - WB

Construction cost.

Over flown rain water

- Swept rock, sand to obstruct the flow. - subsidence of excavated pit roof, slope roof of the ground.

Dig Ditch installing temporary drainage pipe for the construction Contractor - Employer. - Construction monitor. - Independent monitoring for safety. - Bureau of R&E. - Community’s representative. - WB

Construction cost.





Drainage line

Build up fence - Restrain trade and business of households. - Obstruct travel of people. - sabotage the urban landscape.

- Set up fence High 2m surrounding the site to isolate and reduce socio-environmental impact may happen. - Public claim of the project. - Propagate and encourage to gain the consent, support of the people. - Inform the time and construction progress for preparation of the people. - Construct completely, as schedule. - Distribute the traffic routes rationally. - Construct at night. - Solve timely claims of people.

Contractor - Construction monitor. - Independent monitoring for safety. - Bureau of R&E.

Construction cost.


- Noise, exhaust of trucks. - Pollution of scattered dust, soil, rock.


- Using trucks from developed countries manufactured in accordance to environment safety standard, with valid depreciation and frequently check, maintain. - Using a membrane to tightly cover the truck load and check.


Construction cost.


Generate dust Equip personal mask, Equip labor protection for workers Contractor - Employer. - Construction monitor. - Independent monitoring for safety. - Bureau of R&E. - Community’s representative. - WB

Construction cost.

Foundation pit excavation for drainage line construction

- Exhaust, noise from machine. - Excavated soil, dust.

- Using machine from developed countries manufactured in accordance to environment safety standard, with valid depreciation and frequently check, maintain.

Contractor - Employer. - Construction monitor.

Construction cost.





- Equip labor protection for workers; circulate workers contact with the noise. - Excavated soil is clay, transported to aggrandizement site, support grading the treatment plant. - Using a membrane to tightly cover the truck load and check. - Site’s fence 2m high isolates and prevents leftovers scattering outside.

- Independent monitoring for safety. - Bureau of R&E. - Community’s representative. - WB

Subsidence of excavated pit roof

- Endanger workers under the excavated pit. - House subsidence of adjacent people.

Take topography survey, design relevant excavated roof. Contractor - Employer. - Construction monitor. - Independent monitoring for safety. - Bureau of R&E. - Community’s representative. - WB

Construction cost.


Equip labor protection for workers. Contractor - Employer. - Construction monitor. - Independent monitoring for safety. - Bureau of R&E. - Community’s representative. - WB

Construction cost.

Concrete placement, mixing

- Exhaust, noise. - Dust, cement, sand, rock. - Scatter concrete, left-overs. - Wash water.

- Using concrete mixer from developed countries manufactured in accordance to environment safety standard, with valid depreciation and frequently check, maintain. - Equip personal mask, Equip labor protection for workers. - Drain wash-water to drainage manhole on the line. - Sanitize, clear up the site, contact Public Work Enterprise for sanitary collection, and landfill.

Contractor - Employer. - Construction monitor. - Independent monitoring for safety. - Bureau of R&E. - Community’s representative.

Construction cost.





- WB Concrete maintenance

Concrete Wash water maintenance

Drain concrete water maintenance to drainage manhole on the line.


Construction cost.

Operation stage

Operation of the wastewater pumping station

Noise, bad odor Urban landscape - Pumper is counter-setting deep in the water, the pumping station is countersunk setting under the ground so the noise is very small and hardly hearable. - Countersunk pumper is the product of developed countries manufactured accordance to environment safety standard, frequently check, maintenance. - The pumping station is countersunk setting under the ground, sealed with BTCT cap to prevent odor, for maintenance, open the cap and spray odor-killer.

Operation unit - Bureau of R&E. - Community’s representative.

O&M cost

Collection and treatment of urban wastewater

Wastewater, bad odor Urban landscape - Collect urban wastewater with capacity 10.000 m³/day by pipeline and manhole preventing bad odor. - Treated wastewater at the plant by bio-lake and antiseptic works comply with QCVN 14:2008/BTNMT - Column B before discharging to receiving source Dakrip. - Contribute in the resolution of environment pollution, bring clean, green habitat for people and boost the socio-economic development.


O&M cost

Dredge sludge of manhole, septic tank, bio-lake

Solid waste, bad odor Urban landscape - Spray odor-killer chemicals. - Load sludge to the truck, seal the cap and transport to Dong Xoai Waste treatment to process sludge.


O&M cost

Leaking Clo gas Air pollution, sabotage the health of workers

- Using the Industrial Clo Tank therefore the safety is ensured. - Equip anti-poison mask, cylinder and protection suit. - Allocate the wash-water faucet for whole body of workers incase of Clo gas leaking.


O&M cost





2. Environmental Management Framework

Table 7-1. Responsibilities of stakeholders in EMF

No. Organisation Responsibility

1 PMU

- The main responsibility of the implementation of EMP. - Control and minimize environmental impacts - Designate qualified members as their environmental staff and

environmental supervisors - Coordinate with other organizations in the implementation of EMP

o Work closely with the Districts’ and Wards’ Environmental Officials in the management, operation and monitoring of the project.

o Maintain close cooperation with the relevant enterprises in charge of water supply, sanitation, solid waste collection, etc. to monitor the O&M during the operation of the project.

- Supervise the implementation of mitigation measures by the contractors.

o Monitor the project performance indicators related to environmental issues;

o Carry out spot-checks to ensure that the contractors are implementing mitigation measures as specified in the construction contracts;

o Review regular reports by the CMC to ensure the compliance of

Binh Phuoc Province’s People Committee People’ Committee

Related departments and organisations

PMU

Environmental Management - PMU

General control

CONSTRUCTION ACTIVITIES

Public services

companies (water supply and drainage companies, URENCO)

ISMC

Local government

Public representativ

e

CMC

Figure 7-1. Environmental Management Framework

Responsibility

Cooperation



No. Organisation Responsibility mitigation measures;

o Review reports by the ISMC on overall environmental impacts of the sub-projects;

- Based on the above reports, report to WB and DONRE on environmental compliance of the sub-projects as part of their bi-annually progress reporting.

- In order to get the best performance, PMU should have a specialized group responsible for environmental management (EM-PMU)

2 Construction Contractors

- Actively construct a plan for mitigation measures based on the EIA and working schedule of contractors

- Ensure all the construction activities having sufficient documents from the related organization

- Implement all the mitigation measures to prevent adverse impacts and protect the environment.

- Ensure that all staff and workers understand the procedure and their tasks in the environmental management program

- Report to the PMU about difficulties and their solutions - Report to stakeholders as having environmental accidents and coordinate to

resolve these issues

3 Construction Management Consultants

- Monitoring the process and procedure of basic constructions, technological standards and construction rate of contractors

- Monitoring the implementation of mitigation measures of contractors. This task must be clearly regulated in the contract between CMC and PMU

4 ISMC

- Independent from the contractors and CMC, having specialists in environmental management and under the management of PMU.

- Supporting PMU to establish and operate the EMS - Supporting PMU to establish periodical report on environmental

management in the project implementation to hand over to supporters and DONRE

- Directly coordinate with stakeholders to resolve the problems - Providing recommendations and raising capacities for stakeholders in the

operation and monitoring of the environmental management in the construction phase of contractors

5 DONRE

- Playing the key role in public environmental management, DONRE is responsible for receiving and investigating the environmental monitoring reports from PMU

- When there are problems, DONRE will participate directly into research and resolve the related problems and reduce the loss.

6 Environmental Police

- Monitoring and fining the illegal activities - Coordinating with stakeholders to investigate and resolve environmental

risks

7 Related organisations

- Coordinating with PMU and contractors to move the submerged construction and connect temporarily at the cross sections in order to avoid a break-down in public services

- Managing the invisible cultural heritage - Participating in solving environmental problems

3. Environment monitoring program Monitoring the environment quality is the most important duty in the environment management task. Environment monitoring is the complex of science-technic-technology-organization to controll, monitor closely and systematically the morphing tendencies of environmen quality. Environment quality monitoring can be difined as and process of: observe-measure and analyze-process and controll frequently, continuously base on the quality data of the environment. Thus, environment quality monitoring is the indispensable mean for the managers, specialists to control closely the polluting waste source, adject manufacturing



plan and mitigate the impacts, coordinate funds to overcome, treat the pollution and protect the environment effectively. The environment monitoring in the project with the supervision some norms taht indicated via physical, chemical and biological data of the environment. The result of frequent, long-term environment monitoring is meaningful not only for discovery the changes of the environment to propose solving-protecting measures but also contributes to evaluate the precision of the environment impacts forecasts which are mentioned in the socio-environmental impacts evaluation report. Objective The objective of the enviroment quality monitoring program in waste water treatment plant of Dong Xoai Town, Binh Phuoc Province is the continuous monitoring info on environment quality morphs by the activities of the treatment plant in order to timely discover negative impacts to the environment and propose prevention, mitigation measures the pollution. In addition, the environment quality monitoring also ensure the safe operation fir the wase water treatment plant. The following data are collected during the monitoring stage, which must ensure the basic attribute as follow: - Data precision: the monitoring data precision is evaluated by the equivalent capability

between data and reality. The less variation between data and reality the better to have the most proper point of view and precisely direction.

- The characteristic of the data: means that the data collected from the observation point must represent for the specific space and in the specific time. This characteristic helps the observers not to carry with the numerous samples that wastes time, effort and money for the analysis process but still have the verified, characteristic data for that whole measurament.

- The homogeneity of data: the collected data at different points in different time, must have the comparison-ability to each othe. The comparison-ability of data is called the homogeneity of data.

- The synchronism of data: the data must include adequately info about that element and relevant elements. Thus, have general evaluation for the elements to be mentioned.

- The capability of monitoring stably, continuously and chronologically: Can give out the series of data. Those data will comply with the specific rule and equivalently near function with that change. Base on this function we can know the change of data chronologically.

- Monitoring content: the content is proposed with indentified, important and highly evaluating environment quality evaluation data.

Begins from the manufacture characteristic and waste generating sources of the waste water treatment plant in Dong Xoai, Binh Phuoc Province analysis, the environment quality monitoring program for the surrounding area need to focus on monitoring the following environment elements: - Environment management and monitoring plan. - Monitoring the air environment quality and noise. - Monitoring the water environment quality. Environment monitoring plan Investment construction plan The construction period occurs about 24 months, during this stage the environment monitoring will be implemented as follow: - Data of noise, exhaust and dust: these data will be monitored at 2 areas which are

considered the most affected(treatment plant area and area along the main routes of the town, where the main drainage line runs through), with frequency: 2months/time for the whole 24 months of the construction stage.

- Monitoring point: the environment quality monitoring point’s location during the construction stage must coincide with the points where ground environment data in this report collected.



- Gathering: the gathering of construction waste and soils with labor safety measures will be monitored 1month/time for the whole 24 months of the construction stage Waste of workers also needed to be monitored to collect and treat hygienically.

- Environment monitoring report: during the construction stage, the construction unit prepares and submits the local environment control organization quarterly or when asked in each particular time.

Management operation stage - Monitoring the water quality:

The intake water quality and the treated water quality in the operation stage are implemented to collect samples every once a month with frequent, basic norms in the operation stage. In the 1st month, can collect samples by day to gain secured and reliable data (norms in column (3) TCVN 7222:2002). After that, can collect sample by week or frequency 1month/time and report to Town Environment Department to gain instruction, direction and proposal for treatment, operation with rational and effective capacity.

The observation point’s location during the construction stage must coincide with the points where ground environment data in this report collected, includes the location of intake samples at the centralized gathering manholes and Pista sand sedimentation, the outlet samples at the Dakrip discharge gate.

- Subsidence: Monitor the subsidence in and surrounding the treatment station annually to ensure the quality of works’ structures, frequently check the works’ structure and save contingencies, direct for unusual problems.

- Noise, vibration: monitor the noise norms will be implemented at the waste water transition pumping station and pumping stations within the treatment range with the monitoring frequency is 3months/time.

- Waste sludge properties: monitor The waste norm during the transportation includes: the gathering of sludge will be monitored 6months/time.

- Air content: the air quality is check monthly at the chemicals house area to have emergency response measures in case of the chemicals leakage. The sewer-line network, drainage sewer will be checked to mitigate the waste water leakage to the underground-surface water.

Environment monitoring report in the operation stage will be prepared and submitted the local environment control bureau annually or when asked in specific time by the operation unit. The environment monitoring is presented in table V.2 and VI.3.

Table VI.2. Environment monitoring plan in clearance and construction stage

Data Monitoring Time Monitoring purpose/Vietnam standard(QCVN)/Vietnam criteria(TCVN)

Air quality

Monitoring dust in all the construction site and sensitive spots. Air quality on sidewalks at the intersections and digging spots on the main route.

Daily as required (dry season).

- QCVN 05:2009/BTNMT – National Technical Standard of the surrounding air quality. - QCVN 06:2009/BTNMT - National Technical Standard of the poisonous substances in the surrounding air. - QCVN 19:2009/BTNMT - National Technical Standard of the industrial exhaust, dust and inorganc substance.

Noise

Monitor the noise degree (dBA) in vicinities of the digging –lighting up works; monitor the work hour, distance between at the noise measurement point to the sensitive vicinities.

Daily as request from vicinities of digging, clearance works and operating machines.

- TCVN 5949:1998 - acoustics – noise in public, residential area, the maximum allowed noise degree. p - TCVN 5948:1999 – Transportation means’ noise when accelerating – the maximum allowed degree. - TCVN 3985:1999 – The allowed noise degree in workshops (industrial manufacture).




Received water

Carefully monitor BOD/COD and Coliforms to make clear the pollution and contamination. On-spot monitoring DO, TSS values.

Frequency 3- 6 times/year

- QCVN 24:2009/BTNMT - National Technical Standard of industrial waste water. - QCVN 14:2008/BTNMT - National Technical Standard of domestic waste water. - QCVN 08:2008/BTNMT - National Technical Standard of surface-water quality.

Clean water/underground water

Check clean water/underground water to verify no leakage pollution generates from the isntallation.

Monthly, or unperiodically recorded reponse(coordinate with the Healthcare Bureau).

- QCVN 01:2009/BYT- National Technical Standard of edible water quality. - QCVN 09:2008/BTNMT - National Technical Standard of underground-water quality.

Domestic and construction solid waste

monitor the component, weight, traffice lines and disposal,treatment.

Plan program of terms and management plan for the identifiec solid waste in the design stage.

TCXDVN 261-2001, Contraction’s conditions and agreement with the contractor.

Traffic

Monitoring suitable for traffic management plan and changing air quality on sidewalks, quantities of vehicles and traffic capacity, and monitor closely work hour, vehicles sanitation, coverage of materials transportation means.

weekly, or during the digging of main routes stage and rush hour(on-spot measure CO, molecule and dust)

The contract terms are indentified Traffic management plan; this plan will be compiled in detail design stage and verified by the NR&ED, TD and TPC.

Ground and aquatic ecology

Identify the receipt water source and the ecology-monitor trees and basic species.

3times a year.

Contract terms and equvalent VNS about quality of earth and water.

Health and safety

Healthcare terms will be identified contract agreements yet comply with frequent check.

Weekly or monthly - Decision No. 29/1999/QĐ-BXD of the MOC issues the regulation of environment protection of construction industry; - Circular No. 07/1999/TT-BXD of the MOC about the compliance with construction standard; - Decision No. 64/2003/QĐ-TTg of the PM regarding appraisal The thorough treatment plan on facilities that cause serious environment pollution.

Socio-economy

Depends on the terms of the preliminary RAP and community monitoring activities in Community Environment Management Program.

As identified by socio-impacts and resettlement terms.

Depends on contract terms



Notice: Location of quality monitoring point in the implementation must coincide with the location to collect ground environment quality samples in chapter II of this report.

Table VI.3. Environment monitoring plan in management opeartion stage


submergence controlling measures

Monitor the conditions of drainage system and identify any area with flood water stocking

rainy season Comply the Decision No.752/QĐ-TTg appraisal for master planning of drainage by 2020.

Quality of air/noise and vibration

Monitor odor at all surface points of important infrastructure and sensitive sources. Pumping station, waste water treatment means, sludge treatment and disposal means.

3times/year or as request

- QCVN 05:2009/BTNMT - National Technical Standard of the surrounding air quality. - QCVN 06:2009/BTNMT - National Technical Standard of the poisonous substances in the surrounding air. - QCVN 19:2009/BTNMT - National Technical Standard of the industrial exhaust, dust and inorganc substance

Received water

Monitor the water quality before and after treatment and the intake palce.

monthly, and/ or as request of the sponsor.

- TCVN 7222:2002 – General requirement aout the enviroment for centralized waste water treatment station. - QCVN 24:2009/BTNMT - National Technical Standard of industrial waste water. - QCVN 14:2008/BTNMT - National Technical Standard of domestic waste water. - QCVN 08:2008/BTNMT - National Technical Standard of surface-water quality.

Clean water/underground water

Check clean water/underground water to verify no leakage pollution generates from the upgrading

3 times/ year or depends on case not comply with the regulation (coordinate the the DOH)

- QCVN 01:2009/BYT- National Technical Standard of edible water quality. - QCVN 09:2008/BTNMT - National Technical Standard of underground-water quality.

Waste water capacity

Monitor frequently the suitable disposal data to indentify the design capacity forecast of the waste water treatment plant.

3 times/ year or depends on case not comply with the regulation

- QCVN 24:2009/BTNMT - National Technical Standard of industrial waste water. - TCXD 188-1996: urban waste water: standard for the disposal current.

Sludge disposal

Monitor treating surplus sludge and generated sludge, transporting and discharging sludge( the suitable route is the sludge disposal area of the city).Records of the operator will be prepared availably for the PMU and NS&ED

1time/year or as request.

operation contract

Ground and aquatic ecology

Monitor the ecology& water quality at the receipt location-monitor the living environment of trees and creatures to

2times/year

Contract terms about waste water treatment means operation.




identify to tendency. Health and safety Healthcare terms will be

identified contract agreements yet comply with frequent check.

as request - Decision No. 29/1999/QĐ-BXD of the MOC issues the regulation of environment protection of construction industry; - Circular No. 07/1999/TT-BXD of the MOC about the compliance with construction standard; - Decision No. 64/2003/QĐ-TTg of the PM regarding appraisal The thorough treatment plan on facilities that cause serious environment pollution

Socio-economy

Depends on the terms of preliminary RAP and the circled community monitoring activities.

As identified by socio-impacts and resettlement terms.

Depends on contract terms, including demand for consultancy for the community.

Notice: Location of quality monitoring point in the implementation must coincide with the location to collect ground environment quality samples in chapter II of this report. Specific environment monitoring standards Monitoring air quality and noise - Purpose of air and noise monitoring

Observe the concentration of pollutants in the air which generated from activites inside and outside of the waste water treatment system;

Recognize soon the increasing disposal of air pollutants from the disposal sources to propose mitigation measures.

- Location of air quality, noise monitoring points: air quality monitoring is implemented to all the disposal sources in the area of the waste water treatment plant and some points outside the walls of the plant which are the potential locations of impacts from operation activity of the plant to surrounding area. Monitor the affect by the operation of the waste water treatment plant in Dong Xoai Town will focus on the following objects: Monitor the exhaust source Monitor the affection degree of the disposal to the surrounding air environment of

the waste water treatment plant. Monitoring the disposal source: - Monitoring location:

In the implementation stage, need to focus on safety issues, the Contractor must measure and observe the air environment quality, noise in the construction area, surrounding area…

In the operation stage, need to monitor the air environment quality at locations in the treatment process line that generate poisonous exhaust and locations generate noises (which presented in chapter 3), monitor, observe the air environment quality, noise in the surrounding residential area…

- The environment data need to be monitored: Monitoring data in the cosntruction stage: 11 criteria, including: Microclimate (temp,

humidity, wind speed), Thermal radiation, SO2, CO, NOx, O3, Floating dust (TSP), dust 10 m (PM10), Pb, noise (dB), Vibration degree (cm/s)).

Supervision parameters in the period of operation: 11 chỉ tiêu, including: Micro-climate (temperature, humidity, wind speed), Heat radiation, SO2, CO, NOx, O3,

Floating dust (TSP), dust 10 m (PM10), Pb, Noise (dB), Vibration (cm/s)). - Supervision frequency



Supervision frequency during construction: Supervising and Observing during the period of ground preparation, construction and trial operation o As for air, observation: 10 positions (3 samples/position) 1 time/month; o As for noise (measured in hours, from 8 h - 16 h and before 8 h - after 16 h):

10 positions (3 samples/position) 1 time/month Supervision frequency during trial operation:

o As for air, observation: Observing 5 positions in treatment factory (5 positions 2 samples/position 4 times/month) = 40 samples, outside treatment factory 3 positions ( 3 positions x 2 samples/position 2 times/year);

o As for noise (measured in hours, from 8 h - 16 h and before 8 h - after 16 h): 5 positions (5 positions 2 samples/position 2 times/year).

Supervision of water quality - Target of supervision of water quality: Main target of supervision system of water quality

is supervising ingredients of waste water and following the effect of waste water process after treating surface water environment of Dakrip spring.

- The position of water quality monitoring places: Supervising water quality is implemented to waste source in the areas of waste water treatment station and water source in residential areas. Supervision of water quality is divided into 2 types: supervising water quality after treatment and supervising water quality of receiving waste water sources during operation

Conducting analysis and assessment water quality In the period of construction - Supervision position: In the period of construction, observation and supervision of

surface water environment in the area of building treatment station, underground water in households near project area are needed.

- Environmental parameters need to be supervised: + Targets need to be analysed as for surface water: 18 targets, ,including: pH,

Dissolving oxygen (DO), Total floating solid (TSS). COD, BOD5 (20oC), Ammonia ( +

4NH ) (by N). Clorua (Cl-). Florua (F-). Nitrit ( 2NO ) (by N). Nitrat ( 3NO ) (by N).

Phosphat ( 34PO ) (by P). Fe, Surface active agent, Total lubricant, Phenol (total).

Plant protection chemical of organic. Plant protection chemical of organic chlorine. Coliform.

+ Targets need to be analysed as for underground water: 14 targets, including: pH, Hardness (by CaCO3), Total solid, COD, Amoni ( +

4NH ) (by N), Clorua (Cl-), Florua

(F-), Nitrit ( 2NO ) (by N), Nitrat ( 3NO ) (by N), Phosphat ( 34PO ) (by P), Fe, Asen

(As), Mangan (Mn), Coliform. Supervision frequency

o Surface water: 8 positions 3 samples/position; o Underground water: 4 positions 3 samples/position; o Waste water: 4 positions 3 samples.

In the operation process of the project: - Supervision positions:

o Output waste water from treament station. o Supervising surface water quality in receiving water source after treatment in

water treatment factory in the area (water from Dakrip spring) - Environmental parameters need to be supervised:

+ Targets need to be analysed as for surface water: 18 targets, including: pH, Dissolving oxygen (DO), Total floating solid (TSS). COD, BOD5 (20oC), Amoni ( +

4NH ) (by N). Clorua (Cl-). Florua (F-). Nitrit ( 2NO ) (by N). Nitrat ( 3NO ) (by N).

Phosphat ( 34PO ) (by P). Fe, Surface active agent, Total lubricant, Phenol (total).



Plant protection chemical of organic. Plant protection chemical of organic chlorine. Coliform.

+ Targets need to be analysed as for underground water: 14 targets, including: pH, Hardness (by CaCO3), Total solid, COD, Amoni ( +

4NH ) (by N), Clorua (Cl-), Florua

(F-), Nitrit ( 2NO ) (by N), Nitrat ( 3NO ) (by N), Phosphat ( 34PO ) (by P), Fe, Asen

(As), Mangan (Mn), Coliform. Supervision frequency o Water after treatment: 2 positions 1 samples/position 12 times/year) o Water in Dakrip spring: 2 positions 2 samples/position 4 times/year)

Supervising waste quantity and arising sludge In the period of construction: waste quantity and arising sludge are not much, mainly due to the activities of official and public employees directly working in the project area. This waste is collected and transported by Public Works Company. In the period of operation: Sludge dredging manholes, drains, mud tunnels, sludge generated in biological treatment process is relatively large. Therefore, they are required to have a daily supervising program of arising volume to find out and handle problems promptly overloaded. Making economic contracts with Public Works Company for periodical collection, with Investment Corporation Technology Development and Environment of Binh Phuoc to be processed. - Environmental parameters need to be supervised (mainly for sludge)

Some targets need to be analyzed , , including: pHKCl, Humidity, Total nitrogen, Total phosphorous, Amoni, Sunfat, Cr6+, Pb, Zn, Microorganism, Total organic

Supervision frequency: 02 pressed sludge samples 2 times/year.

4. General reporting and information for the EMP Exchange of information It is a request of environmental management to conduct necessary information exchange among different departments and positions. Besides, relative information should be released to outsiders such as relative parties and the public. Internal information exchange can be carried out by means of conferences, internal briefing, etc. However, one official conference must be held once a month. All information exchange should be recorded and filed. External information exchange should be carried out every half or one year. The information exchange with co-operative partners should be recorded in minutes and filed.

Records For an effective operation of the environmental management system, a complete recording system should be established and following records should be maintained: 1. Stipulations of laws and regulations; 2. Permits; 3. Environmental impacts; 4. Training; 5. Check, calibration and maintenance activities; 6. Monitoring data; 7. Occurrence of non-compliance; 8. Effectiveness of rectifications and prevention measures; 9. Information of parties involved; 10. Auditing; 11. Evaluation. In addition, necessary control for various above mentioned records is required, including tagging, collection, listing, filing, keeping, maintenance, query, term of keeping, disposal, etc.



Reporting During the implementation of the project, the contractors, monitoring agency and Project Management Office should keep a record of items including project progress, implementation of Environmental Management Plan (EMP), environmental quality monitoring results, etc., and report to relative authorities. The main contents consist of the following 3 parts: 1) Monitoring agency and contractors maintain a detailed record of EMP implementation and report to Project Office in a timely manner. 2) The content of EMP progress, such as progress and effect of implementation, should be included in project progress reports prepared by Project Office, including monthly, quarterly and annual reports. 3) The annual EMP implementation report should be ready and submitted to the World Bank before March 31 of the following year. The EMP implementation report should cover following contents: (1) Implementation of training plan. (2) The condition of project progress, such as the length of completed pipe network, construction progress of wastewater treatment plant, length of river renovated, etc. (3) Record of possible complaints about the implementation of the proposed project, of the methods proposed to solve them, and of the final result. (4) EMP implementation plan for the following year.

5. Capacity building The training for environmental monitoring will be executed with different groups, based on the different requirements: - PMU: PMU staff that is responsible for environmental issues will be trained to check the

monitoring and prepare reports for DONRE and WB. - Contractors: will be trained to monitor the implementation of mitigation measures and

write the monitoring reports.



Bảng 7-5. Capacity building program for EMP operation

Unit Course Participants Frequency of training

Duration and type

Content Responsibility Capital

PMU Environmental monitoring and reporting

Person(s) in charge of environmental issues and related persons to environmental management

Once at the beginning of the project, updating during the implementation according to the need

One day lecture

- Overall environmental management related to the project including requirements of the WB and DONRE, co-operation with related authorities and responsibilities - Environmental monitoring of the project including structure, content, reporting, ime schedules and responsibilities of the monitoring: + project performance indicators + monitoring of implementation of mitigation measures + community based monitoring + overall regulatory monitoring - Guidance and supervision of the contractors and community representatives how to implement environmental monitoring

the World Bank, DONRE, PMU, ISMC

PMU

Contractors Implementation of mitigation measures

Representatives of main contractors in charge of the reporting to PMU

Once at the beginning of the assignment of each contractor, updating according to the need

2 days lecture to the main contractors, submission of the examples of monthly environmental monitoring reports

+ Briefing of overall environmental monitoring + Monitoring duties of the contractor according to the contract documents + Monthly mitigation monitoring reports: content, what and how to monitor, how to fill the reports, submission of the reports, responsibilities + Environmental part of the quarterly reports: implementation of mitigation measures, identified problems and solving of the problems

PMU with assistance of the World Bank Hanoi office

Contractors

Workers Safety and environmental sanitation

Representatives of workers (group leaders) who work directly in the

One at the beginning of the construction work, updating

One day lecture and one day on-

+ Briefing of overall safety and environmental issues + Duties of the workers

PMU with assistance of the ISMC

Contractors



Unit Course Participants Frequency of training

Duration and type

Content Responsibility Capital

project components during the implementation according to the need

site presentation

+ Safety and environmental sanitation management on the works + Mitigation measures to apply in the works + Safety measures on electricity, mechanic, transportation, air pollution + How to respond to emergency cases

Communities On-site observing and monitoring

Team leaders of catchment drainage area

Once before the beginning of the construction

One day lecture and one day on-site presentation

+Briefing of overall environmental monitoring + Duties of communities + Content and type of observation during construction: water supply, drainage, dredging, roads, solid waste, dust, noise + Content and type of observation during operation: water supply, drainage, dredging, roads, solid waste, dust, noise + How to make and record on-site observations, examples on-site + Monthly mitigation monitoring reports: content, what and how to monitor, how to fill the reports, submission of the reports, responsibilities + Environmental risks during construction and operation + Receiving, collecting and reporting on complaints from the residents + Reporting to PMU

PMU with assistance of the ISMC and World Bank Hanoi office

PMU



VIII. PUBLIC CONSULTATION 1. The necessity of the community consultancy

Community consultancy is one of the important, indispensable parts in environment and society impacts evaluation reports of the project. To implement this task, the Employer will coordinate with Dong Xoai Town PC, Design Consultant, and Environment Consultant to organize community meetings in the project area. During that consulting meeting, the employer contacts to the people and introduce about the project as well as the Design and Environment Consultant present measures, impacts and the respective mitigation measures for people to know the status, understand the benefits as well as the limits. Thus, receiving the help, support and consensus of the people and the local government via preciously constructive comments recorded during the community consultancy.

2. Purpose of the info propagation and community consultancy This activity is to consult the environmental issues of the project to the community actively, spin-off conflicts with proposing mitigation measures base on the realistic and local insights, utilize the consent support of the people, ensure the project to be implemented on schedule, conveniently and sustainably. The activities will be implemented as follow: - Binh Phuoc Water Supply & Drainage Co.Ltd coordinates closely to PPC and Dong

Xoai TPC, Fatherland Front Committee, ward PCs in the project area. - Share info on imtes, anticipating activities of the project to concerned parties. - The participation of the community through direct communication meeting. Thus, solve

people’s conflicts, propose technic options, rational mitigation measures. - Collect info of demands and recommendations of people, especially the affected ones,

as well as receving info on their reactions about the anticipating policy and activities. - Info propagation, environment consultatncy, compensation and cleareance policy as

well as other relating activities will be implemented simultaneously.

3. Specific content of community consultancy - Recapitulate the main contents of the project, recapitulate the environment impact

evaluation report of the project; - Compile the official document contents of community consultancy, submit to PC, FFC

and ward,commune PCs in the project area; - Proces the info data of recommendation documents of the local authorities.; - Summarize data and analysis of comments and report the results.

4. Results of community consultancy The community consultancy of the project is done in 2 periods, including answering questions in the household socio-economic survey and community consultancy meetings. Household socio-economic survey (interview- answer questions in sheet) is made from June 22th 2010 to July th 2010, the sheet has 56 questions, total household interviewed is 1,272 (representing 5% of total household.). Community consultancy meeting on October 4th /2010 at the meeting room of PC of Dong Xoai Town with the participant of representatives of household whose land and front road are reclaimed to build the wastewater treatment plant and representatives of local government of the project area.

Results of community consultancy The residential community who participate in conslutancy with Group of Environmental and social impact assessment, the PMU, Fatherland Front, PC of wards and communes in the project area. With the result as follows: - Fatherland Front, PC of wards and communes in the project area have the approval of

measures and commitments to mitigate the environmental impacts during project’s construction and operation: dust, exhaust, noise pollutions.

- Recommendations to the Employer to identify the specific landmarks of the repairing and reconstructing sewer lines for citizens to feel assured, support the compensation and site clearance.



- Approval of construction plans for storm water and wastewater drainage system, the project will significantly improve the ecological environment of Dong Xoai Town, as well as complete the infrastructure conditions, meet the development plan of the town at present and in the future.

- No objection to the environmental impact assessment of the project in the process of clearance, construction and operation of the project, agreed with the measures and commitment to minimize the environmental impact during the process of impementation.

The percentage of households who desire to implement the project soon and put into operation for them to be connected to the living wastewater drainage system is 94.3%. Most of the households and local government attended the community consultancy meeting were agreed and supported the project, desired early implementation of the project; while constructing must finish at a given moment, not spanning to cause influence of citizens’ movements, sabotage the urban landscape and cause environmental pollution.



Table 8-1. Results of community consultancy

Activity Form of public consultation

Time Place Number of participants

The issues raised from citizens Feedback

First time

Distribute household socio-economic survey in the process of project planning, the number of sheets is 1,272, each sheet has 56 questions.

From June 26th 2010 to July 5th

2010

12 wards and communes including: Tan Phu, Tan Binh, Tan Thien, Tan Dong, Tan Xuan, Thuan Phu, Tan Thanh, Tien Thanh, Tien Hung, Dong Tien, Tan Phuoc, Tan Hung.

Choose randomly 5% on households in the project area, with the number of interviewed households is 1,272.

- Flooding during rainy season due to no drainage (48%). - No wastewater collection and treatment system (61%). - Desire to build a storm water and wastewater drainage system (29.4%), road upgrading (24.3%), clean water (23.8%). - Desire to connect to the drainage system (94.3%). - Willing to pay drainage fee (96.7%) - Desire the project to support costs of connecting to the drainage system (100%).

- The project will construct storm water drainage lines to resolve the inundation. - The project will construct collecting lines and living wastewater treatment plant. - Households will be connected to the drainage system when the project is completed.

Conclusion: Most of interviewed households in the project area agreed and desired to connect to the collecting wastewater treatment system with the percentage of 94.3%. However, they also made comments that the price paid for the drainage needs to be research to match the income of most households in the region and operating funds of the collecting wastewater treatment plant. Most households proposed the drainage fee is 10,000 VND per month. Second time

Comunity consultancy meeting.

October 4th 2010

Meeting room at PC of Dong Xoai Town

25 people - Representatives of citizens at hamlet 3, 4, Tien Thanh commune fully support to the project, desire the project to ensure storm water collecting does not cause runoff, flooding; wastewater collection and treatment does not cause environmental pullution. - Representatives of citizens at 2 flooded locations at the intersection of NR 14 and Phu Rieng Do street, the alley next to Tan Hoang Long company, from NR 14 to Phu Rieng Do Street, are pressing of inundation and desire the project to solve the problems of storm water collecting and drainage, especially the wastewater treatment

- When the project complete will completely solve the flooding, wastewater collecting and treatment problems reach the standards before discharge into the environment. - The PC of Dong Xoai town will establish a bureau of compensation, site clearance and resettlement, fully implement the state policy on land acquisition and resettlement, support living and create job opportunities for households, timely resolve



does not cause environmental pollution. - Representatives of citizens with land acquisition and resettlement at Tan Tra quarter, Tan Xuan commune support the project for the big benefit that brought by the project, is the storm water drainage, flood prevention, wastewater collecting and treatment, solving the problems of environmental pollution, so they are willing to allocate land for the project when the employer made the site clearance and resettlement. And desire the employer and local governments to fully implement the state policy of land acquisition and resettlement, care for their living after resettlement, create job opportunities. - Represenatives of citizens on the drainage lines see the big benefits that brought by the project, is storm water drainage, flood prevention, wastewater collecting and treatment, solving the problems of environmental pollution, so they are willing to support when the project construct the drainage lines through the business households. And desire the employer to construct completely as the schedule so as not to affect trade and business for too long and sabotage the urban aesthetic.

the complaints and inquiries. - Selected constructing contractor is the contractor has the capacity and experiance, constructing supervise as the schedule and timely resolve when there are problems. - Timely resolve the problems and complaints of citizens in the construction process.

Concusion: Most of the households affected by the impact of the project support the project because they can see the huge benefits of flooding solving, wastewater treatment, environmental pollution mitigation that brought by the project. The impact of the project only happen in a short time while constructing, the rest is beneficial impact of the project on environment and socio-economic.



IX. INFORMATION DISCLOSURE The guideline for drainage and wastewater treatment system in Dong Xoai Town project establishment is posted publicly on website:. Both important meetings regarding project implementation, report of project components are broadcasted by the BTV and BR and posted online on website: http://www.bptv.com.vn. Scocio-economic survey, community consultation were carried out in order to propagate info to the community. Info about resettlement compensation plan is posted on the APB of the communes’, wards’ PCs. During the construction stage, at the site is the public info table contains: name of the project, name of the package, employer, design consultant contractor, construction contractor, monitoring consultant contractor, total investment, capital etc. In compliance with the WB regulations, the final EIA will be displayed at the Centre of Development Info of Vietnam at Hanoi and Infoshop at Washington DC.

Table 9-1. Information Disclosure

Content of information propaganda

Means of information propaganda

Location of posting information Time

Project undertakings of PC’s Binh Phuoc provine

Gazette http://congbao.binhphuoc.gov.vn June 4th 2010

Household socio-economic survey

Survey sheet of 56 questions

12 wards and communes including: Tan Phu, Tan Binh, Tan Thien, Tan Dong, Tan Xuan, Thuan Phu, Tan Thanh, Tien Thanh, Tien Hung, Dong Tien, Tan Phuoc, Tan Hung

From Juen 22th 2010 to July 5th 2010

Public consultancy meeting on environmental and social impact, resettlement

Community meeting Meeting room of PC of Dong Xoai Town

October 4th 2010

Meeting on investment projects

Publish conference news on TV and website

- Broadcasting and Televison station of Binh Phuoc provine. - http://www.bptv.com.vn

October 7th 2010

Meeting on report of environmental and social impact assessment

Publish conference news on TV and website

- Broadcasting and Televison station of Binh Phuoc provine. - http://www.bptv.com.vn

November 17th 2010

Compensation plan for resettlement, summary of environmental and social impact assessment

Bulletin board PC of Dong Xoai town and 12 wards and communes including: Tan Phu, Tan Binh, Tan Thien, Tan Dong, Tan Xuan, Thuan Phu, Tan Thanh, Tien Thanh, Tien Hung, Dong Tien, Tan Phuoc, Tan Hung

November 20th 2010

Last report of environmental and social impact assessment

Website The Center of Information and Development of Vietnam in Hanoi (Vietnam) and Infoshop in Washington DC (USA).

WB’s approval

X. CONCLUSION The project of drainage and waste water treatment in Dong Xoai Town, Binh Phuoc Province is the construction project of the rain water collection and drainage; waste water collection and drainage; solve the environment sanitation issue; gradually complete the mechanism of infrastructure equipment-item and one of the environment friendly activities.



The general impact of the whole project is positive, satisfies the demand of pople in supplying the drainage and environment sanitation service. And that is the effective mean for management, direction and environment protection task. This is one of the environment friendly projects which are invested in Binh Phuoc, simultaneously offers the people of Dong Xoai Town a synchronous drainage work, contribute to improve the living standard, improve the awareness of the people in envirnment protection. Thus, the project meet the demand of the people about the clean living environment and contributes the justify the city landscpae, attracts tourists and investors to Dong Xoai Town. Those scientific analysis rationales in this report has affermed the construction location and waste water treatment techonology are the optimum options for Dong Xoai Town and ensure after-treatment qualities meet the environment standard. The environmental spin-off during the clearance stage is not numerous, the current land is not the centralized residential area, no important architectural works, as well as tombs graves, pagodas, temples. These are the very convinient condition for the project. The spin-off during clearance, construction stage include: - Exhaust, smoke and noise from transportationand cosntruction means; installation of

sewer system, rain and waste water draiange lines. - Domestic waste water and waste water from construction by the worker in site huts. - Solid waste of workers in the site. The environment impacts of the project include: - Rain water drainage may not be effective, the submergence re-occurs if:

The rain water collection system is broke-down, blocked by soil, sand or wastes. The drains are occupied to build house. Environment, public works protection awareness are not educated frequently, no

proper incentives or purnishments. - The treated waste water may not reach to environmental standards by reasoens:

Dangerous substances in waste water or the treatment process is not throughoutly. There is a need of management and treatment mechanism with for the waste discharging of businesses and manufacturing, commerce facilities in the town.

The waste water transferring pipeline is broke-down or blocked by activities(wastes, road digging, house cosntruction...)

The operation of the waste water treatment plant may also affect to the surrounding air environment by odours from biological process ditches and sludge treatment area.

However, the foresaid environment impacts can be overcome by effective measures: monitor the treatment technology, monitor periodically the waste water quality; check and maintain equipments, machines of the treatment plant, waste and rain water drainage sewer periodically; educate the community... The environment quality monitoring program will be implemented seriousloy by the project management and operation unit with the coordination and instruction of the local environment control organization. The objectives of this program are: manage closely and mitigate the changes of the environment to to bad tendency, as well as ensure the waste water quality meet the current Vietnam standards. With the strict compliance with regulations of the law about environment and proposal of environment pollution mitigation in this report, definitely the cosntruction project of drainage and waste water treatment in Dong Xoai Town will operate well, bring back the positive economic-socio-envionmental results.

Documents

ENVIRONMENTAL IMPACT ASSESMENT - World Bank · TCVN Vietnam standard PC People’s Committee USD Dollar ... - Rainwater drainage: New construction of rainwater drainage sewer line