environmental impact assessment - world bank · 2016-07-10 · ,capacity of 2,000 m3/day” (the...
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TIN NGHIA CORPORATION
NHON TRACH 3 INDUSTRIAL PARK COMPANY LIMITED
VIETNAM INDUSTRIAL POLLUTION MANAGEMENT
PROJECT IN DONG NAI, NHUE-DAY RIVER BASINS
ENVIRONMENTAL IMPACT ASSESSMENT
Of Project
"CONSTRUCT CENTRALIZED WASTE WATER
TREATMENT SYSTEM WITH CAPACITY 2.000
M3/DAY AT NHON TRACH 3 INDUSTRIAL PARK -
PHASE 2 (MODULE 2)"
DONG NAI, 07/2012
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TIN NGHIA CORPORATION
NHON TRACH 3 INDUSTRIAL PARK COMPANY LIMITED
VIETNAM INDUSTRIAL POLLUTION MANAGEMENT
PROJECT IN DONG NAI, NHUE-DAY RIVER BASINS
ENVIRONMENTAL IMPACT ASSESSMENT
Of Sub-Project
"CONSTRUCTION OF CENTRALIZED WASTE
WATER TREATMENT SYSTEM WITH CAPACITY
2,000 M3/DAY AT NHON TRACH 3 INDUSTRIAL
PARK - PHASE 2 (MODULE 2)"
PROJECT'S OWNER CONSULTANT
DONG NAI, 07/2012
3
TABLE OF CONTENTS
TABLE OF CONTENTS ................................................................................................ 3
ABBREVIATIONS ......................................................................................................... 7
LIST OF TABLES .......................................................................................................... 8
SUMMARY OF THE ENVIRONMENTAL IMPACT ASSESSMENT ...................... 9
1. PROJECT CONTENTS .............................................................................................. 9
1.1. Description ........................................................................................................... 9
1.2. CETP treatment technology ................................................................................. 9
1.3. CETP characteristics .......................................................................................... 10
1.4. CETP implementation schedules ........................................................................ 10
2. CHARACTERISTICS OF WASTEWATER RECEIVING BODY BASIN ........... 10
2.1. Discharge points ................................................................................................. 10
2.2. Current environmental status .............................................................................. 10
2.3. Characteristics of wastewater receiving body .................................................... 11
2.4. Nearby discharge ................................................................................................ 11
2.5. Nearby water supply intake ................................................................................ 11
3. ALTERNATIVE SOLUTION .................................................................................. 11
3.1. Discharge point location ..................................................................................... 11
3.2. Wasteawter treatment technology ...................................................................... 11
3.3. Sludge treatment ................................................................................................. 11
4. DISCHARGE IMPACT ASSESSMENT ................................................................. 12
4.1. On water quality ................................................................................................. 12
4.2. On the ecology .................................................................................................... 12
4.3. On river flow ...................................................................................................... 12
4.4. On air quality ...................................................................................................... 12
4.5. Associated risks and accidents ........................................................................... 12
4.6. Socio-economical impacts .................................................................................. 12
4.7. Accumulated and integrated impacts ................................................................. 12
5. POLLUTION MITIGATION TOWARD NEARBY SURFACE WATER ............. 13
5.1. Environmental Management Program ................................................................ 13
Construction stages ...................................................................................... 13
Operation stages .......................................................................................... 13
5.2. Risks managements ............................................................................................ 13
Constructs stages ......................................................................................... 13
Operation stages .......................................................................................... 13
5.3. Public consulting and Information publication .................................................. 13
4
5.4. Capacity building ................................................................................................ 13
5.5. Project owner organisation and responsibilties .................................................. 14
5.6. Environmental quality Monitoring ..................................................................... 14
5.7. Costs and schedules of EMP ............................................................................. 14
6. PUBLIC CONSULTING .......................................................................................... 14
Commitment From Tin Nghia ....................................................................................... 14
PROJECT DESCRIPTION .................................................................... 15
1.1. PROJECT ORIGIN ............................................................................................ 15
1.2. CETP OWNER ................................................................................................... 15
1.3. CETP LOCATION ............................................................................................. 16
1.4. CURRENT SITUATION OF TECHNICAL INFRASTRUCTURE IN NHON
TRACH INDUSTRIAL PARK NO 3 – PHASE II ................................................... 16
1.4.1. List of Industries and Their Wastewater Treatment Capacity ..................... 16
1.4.2. Wastewater Collection System .................................................................... 22
1.4.3. Drainage System .......................................................................................... 23
1.4.4. Industrial waste management ...................................................................... 23
1.4.5. Solid Waste Management ............................................................................ 24
1.4.6. Transportation System ................................................................................. 24
1.4.7. Risk Management ........................................................................................ 26
1.5. DESCRIPTION OF CETP OF NHON TRACH 3 IP – PHASE 2 (MODULE 2)
................................................................................................................................... 28
1.5.1. Treatment Technology, Influent and Effluent Characteristics .................... 28
1.5.2. Characteristics of CETP and sluice-gates ................................................... 29
1.5.3. Sludge treatment technology ....................................................................... 34
1.5.4. Total investment and Progression pace of the Wastewater Treatment Plant
............................................................................................................................... 34
CHARACTERISTICS OF THE PROJECT AREA .............................. 40
2.1. GENERAL CHARACTERISTICS OF PROJECT AREA ................................ 40
2.1.2. Socio-economic Conditions ........................................................................ 43
2.2. CHARACTERISTICS OF RECEIVING WATERS ......................................... 47
2.2.1. Discharge location ....................................................................................... 47
2.2.2. Local Environment Status ........................................................................... 49
2.2.3. Description Of All Discharge Sources With Same Final Discharge
Receiving Body ..................................................................................................... 49
2.2.4. Nearby Water Supply Intake (within 3 km downstream) ........................... 52
2.3. CURRENT ENVIRONMENT STATUS ........................................................... 52
2.3.1. Atmosphere Status ....................................................................................... 52
5
2.3.2. Water Quality Status ................................................................................... 53
2.3.3. Soil Status .................................................................................................... 58
2.3.4. Surrounding Deposit Status ......................................................................... 58
2.3.5. Ecological Environment .............................................................................. 60
EVALUATION OF ALTERNATIVES ................................................ 63
3.1. CRITERIA FOR SELECTING ALTERNATIVES ........................................... 63
3.2. LOCATIONS OF OUTLETS............................................................................. 63
3.3. WASTEWATER TREATMENT TECHNOLOGY .......................................... 63
3.4. SLUDGE TREATMENT TECHNOLOGY ....................................................... 67
IMPACTS ASSESSMENT OF WASTEWATER DISCHARGE INTO
RECEIVING WATER BASIN ..................................................................................... 69
4.1. EFFECTS ON WATER QUALITY ................................................................... 69
4.1.1. Pollution Load ............................................................................................. 69
4.1.2. Assessment on the Impacts on Receiving Sources ...................................... 69
4.2. EFFECTS ON ENVIRONMENT AND AQUATIC ECOSYSTEM ................. 70
4.3. EFFECTS ON HYDROLOGY .......................................................................... 71
4.4. EFFECTS ON AIR ............................................................................................. 71
4.5. IMPACTS OF RISK AND ACCIDENTS ......................................................... 71
4.6. SOCIAL-ECONOMIC AND DOWNSTREAM WATER USE IMPACTS ..... 71
4.7. CUMULATIVE IMPACTS ............................................................................... 72
4.7.1. Mareng Pollution Loads Analysis ............................................................... 72
4.7.2. Thi Vai Pollution Loads Analysis ............................................................... 75
MITIGATION MEASURES ................................................................. 78
5.1. ENVIRONMENTAL MANAGEMENT PLAN AND RISK MANAGEMENT
PLAN ......................................................................................................................... 78
5.1.1. Typical mitigation measures for the site clearance phase ........................... 78
5.1.2. Typical mitigation measures for CETP construction .................................. 78
5.1.3. Typical mitigation measures for CETP operation ....................................... 79
5.1.4. Typical mitigation measures for environmental risks ................................. 94
5.2. RISK MANAGEMENT ..................................................................................... 97
5.3. PUBLIC INFORMATION PROGRAM AND COMMUNITY RELATION . 100
5.3.1. Public Consultation in EMP Report Preparation ....................................... 100
5.3.2. Information Dissemination ........................................................................ 100
5.4. TRAINING ....................................................................................................... 101
5.5. ORGANIZATION OF ENVIRONMENTAL MANAGEMENT AND
RESPONSIBILITY FOR CETP AND IZ ............................................................... 101
5.5.1. Environment Department of Nhon Trach 3 IP .......................................... 102
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5.5.2. CETP operation Team ............................................................................... 103
5.6. MONITORING PROGRAM AND CONTROL OF WATER QUALITY OF
RECEIVING WATERS .......................................................................................... 104
5.6.1. Monitoring of the Centralized Wastewater Treatment Facility ................ 105
5.6.2. Monitoring of Pre- and Post-Treated Wastewater Quality ........................ 105
5.6.3. Monitoring of Water of Receiving Source at the Outlet ........................... 106
5.7. CAPACITY BUILDING .................................................................................. 106
5.8. ESTIMATED COST AND TIME FOR IMPLEMENTATION OF EMP ....... 106
5.8.1. EMP Budgets ............................................................................................. 106
5.8.2. EMP Schedule ........................................................................................... 107
PUBLIC CONSULTATION ............................................................... 108
6.1. THE OBJECTIVE OF PUBLIC CONSULTATION ....................................... 108
6.1.1. Toward Evaluation Authority .................................................................... 108
6.1.2. Toward project owner ............................................................................... 108
6.1.3. Toward consulting agencies ...................................................................... 108
6.1.4. Toward the People’s Committee and Fatherland Front Committee .......... 108
6.1.5. Towards the public from affected areas .................................................... 108
6.2. PUBLIC CONSULTATION IMPLEMENTATION ....................................... 109
6.3. RESULTS OF PUBLIC CONSULTATION ................................................... 109
6.3.1. Results from consulting the People’s Committee ..................................... 109
6.3.2. Results from consulting the Fatherland Front Committee ........................ 110
6.3.3. Results of consultations with the public .................................................... 110
6.4. INFORMATION DISCLOSURE .................................................................... 118
6.5. COMMITTMENTS OF THE PROJECT OWNER ......................................... 118
7
ABBREVIATIONS
BOD : Biochemical oxygen demand
CEPT : Common Effluent Treatment Plant
COD : Chemical Oxygen Demand
DIZA : Dong Nai Industrial zone Authority
DO : Dissolved Oxygen
DONRE : Department of Natural Resources and Environments
EIA : Environmental impact Assessment
EMP : Environmental Management Plan
ENTEC : Environmental Technology Center
IP : Industrial Park
IZA : Industrial Zone Anthority
Ltd. Co : Limitted Company
MONRE : Ministry of Natural Resources and Environments
NT3IP : Nhon Trach 3 Industrial park – Phase 2
QCVN : Vietnam National Regulation
TSS : Total Suspended Solid
VACNE :Vietnam Association for Conservation of Nature and Environment
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LIST OF TABLES
Table 3: The industries in Nhon Trach 3 IP - Phase 1 have pre-treatment system ....... 22
Table 4: Influent and the effluents waste water characteristics of Module 1 versus the
QCVN 40:2011/BTNMT ............................................................................................... 30
Table 6: Daily operating cost ........................................................................................ 36
Table 7: Monthly temperature from 2007 to 2011 – Dong nai province ...................... 41
Table 8: Monthly humidity from 2007 to 2011 – Dong nai province ........................... 41
Table 9: Average annual rainfall Dong Nai .................................................................. 42
Table 10: List of all wastewater discharge sources from Nhon Trach 3 IP .................. 49
Table 36: Mixing Rates ................................................................................................. 82
Table 37: Typical mitigation measures for CETP construction .................................... 84
Table 38: Typical mitigation measures for CETP operation ......................................... 90
Table 39: Mitigation measures for environmental risks ................................................ 92
Table 40: Mitigation measures for environmental risks ................................................ 95
Table 41: EMP Budgets ............................................................................................... 106
Table 42: EMP schedule .............................................................................................. 107
Table 43 Public consultations ...................................................................................... 111
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SUMMARY OF THE ENVIRONMENTAL IMPACT ASSESSMENT
Nhon Trach 3 IP One member Affiliated Co., Ltd is authorised by Tin Nghia
Corporation to manage the infrastructures of the IP; hence is also responsible for the
implementation of the CETP (Module 2), capacity 2,000 m3/day in Nhon Trach 3 IP.
This EMP is constructed by the Environmental Technology Center (ENTEC), part of
Vietnam Association for Conservation of Nature and Environment (VACNE). The
contents of the plan is as below
1. PROJECT CONTENTS
1.1. Description
Aim: to satisfy the increasing in number of firms within the IP and the arisen
demand of wastewater treatment through the development of Module 2 CETP
,capacity of 2,000 m3/day” (the total capacity of two modules is 4,000 m
3/day and
night)
Project Owners: Nhon Trach 3 IP One member Affiliated Co., Ltd
Site Location: Road No. 2, Nhon Trach Industrial Park No. 1, Phase II, Nhon Trach
District, Dong Nai Province.
The Module 1 centralised wastewater treatment system have original capacity of is
2,000 m3/day the system ahs been receiving and treating wastewater of operating
industries in the industrial park. Currently the average wastewater volume is 780
m3/day; nd peaked at 1,169 m
3/day. By November 2012, the total wastewater volume
of Nhon Trach 3 IP, Phase 2 will increase to around 3,000 m3/day. To properly collect
and treat this wastewater, Tin Nghia has been developing the second module to expand
the total capacity of the wastewater treatment facility of Nhon Trach 3 IP, Phase 2 to
4,000 m3/day.
1.2. CETP treatment technology
Wastewater from Nhon Trach 3 IP, phase 2 is treated by two steps as follows:
1st Step (facilities own treatment): the wastewater from private companies will be
treated preliminarily, to meet the influent standard of IP centralised treatment
plant.
2nd
Step (centralised treatment): Preliminarily treated wastewater is collected into
the centralised treatment facility of the industrial park for further treatment ( and
meet the QCVN 40:2011/BTNMT – National Technical Regulation on Industrial
Wastewater, Column B, Kf=1.0, Kq=1.1) prior discharging into the environment
Module 2 technology for Nhon Trach 3 IP CETP can be described as below:
Preliminary and Primary Treatment:
+ Removal of wastewater constituents (rags, sticks, floatables, grits…).
+ Chemical treatment (mixing and flocculation).
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+ Removed floating oils and greases.
Secondary treatment (remove biodegradable organics):
+ Aerobic treatment to removal biodegradable nutrients, BOD, COD.
Tertiary treatment:
+ Advanced treatment by remove residual suspended solid and dissolved materials.
+ Disinfection.
Sludge treatment:
+ Dewater and compact the dried sludge.
1.3. CETP characteristics
The effluent after treatment will be flown through the open ditches B4000, then
closed pipes B3000 before being directed along the upper stream of Lo Ren canal
(along regional slopes toward southeast), and finally being discharged into Thi Vai
River.
The discharge schedule is 24 hours a day.
Discharge flow rate is 84 m3/hr (or up to 2000 m3/day)
1.4. CETP implementation schedules
June/ July 2012: Finished legal works
Aug-Dec 2012: Start the construction
Jan 2013: Implement equipments, pipeline networks.
Feb 2013: Pilot Run
Mar- Apr 2013: Technology and system transfering
2. CHARACTERISTICS OF WASTEWATER RECEIVING BODY BASIN
2.1. Discharge points
Discharge point: Lo Ren Culvert (near Lo ren Bridge) and at coordinates (VN2000):
X: 1.184.745 m;
Y: 413.438 m.
2.2. Current environmental status
Air quality: The analysed sampling results from nearby air quality samples showed
all parameters met QCVN 05:2009/BTNMT, QCVN 26:2010/BTNMT, and QCVN
06:2009/BTNM
Surface Water quality: The analysed sampling results from nearby surface water
quality samples comparing to QCVN 08:2008/BTNMT, column B1 showed parameters
like COD, BOD and TSS over the standards.
11
Soil quality: The analysed sampling results from soil samples showed no heavy
metal pollution
2.3. Characteristics of wastewater receiving body
Thi Vai River is the wastewater receiving body for all of Nhon Trach 3 wastewater
and currently is heavily polluted due to wastewaters from nearby sources. River
flowrate mixed with flood is peaked at 3,400 m3/s, with river with tide reverse flow
peaked with tide at 2,300 m3/s. River flowrate during wet season is around 350 – 400
m3/s and during dry season is around 200 m
3/s. The minimum recorded flowrate is 40
– 50 m3/s. The highest river speed could reach 1.5 m/s. Thi Vai River based on Dong
nai Province planned landuse, is for aquaculture farming
2.4. Nearby discharge
Nearby discharges sources into Thi Vai River is as below:
Industrial sources: Discharges from Hung Nghiep Formosa, Nhon Trach 2 and 3
IPs, with a flowrate of approximate 20,500 m3/day
Agricultural sources: The total volume of wastewater from aquaculture activities
discharged into Thi Vai river is estimated at 7,043,760 to 9,391,680 m3/farming
season. Most of these wastewater is discharged only after harvested (after around 3-4
months)
Residental sources: Domestic wasteater from Long Tho Commune, Nhon Trach
District and Hiep Phuoc District is 1,467 – 1,956 m3/day.
2.5. Nearby water supply intake
Within 3 km downstream of Thi Vai (from Mareng discharge point), there’s no river
water intake sites, even for industrial or aquaculture purposes.
3. ALTERNATIVE SOLUTION
3.1. Discharge point location
As the Module 2 used the same discharge point with the Module1, hence there’s no
alternative solution for the discharge point location
3.2. Wasteawter treatment technology
As the Module 2 have to integrate into Module 1, hence there’s no alternative solution
for the already chosen technology in Module 1
3.3. Sludge treatment
As the sludge treatment of Module 1 still can provide the extra capacity, hence the
Moduel 2 still use the same method as Module 1
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4. DISCHARGE IMPACT ASSESSMENT
4.1. On water quality
After the Module 2 start operating, a flow of 2,000 m3/ day will contribute into
Mareng Canal flow, bring with it an equivalence of 31.6 kg TSS, 14 kg BOD5, 104 kg
COD, 0.76 kg ammonia and 0.36 kg Total iron
4.2. On the ecology
Currently, there is no expected impact by the discharge onto the ecology and
mangrove areas downstream (Long Thanh – Nhon Trach areas)
4.3. On river flow
The discharge rate from the CETP (Module 2) is insignificant comparing to Mareng
and Thi vai river, hence won’t affect the river and canal flow
4.4. On air quality
The discharge from The CETP does not produce odour as from the interviews toward
the residential areas and hence does not impact onto regional air quality
4.5. Associated risks and accidents
Due to the low discharge rate 2,000 m3/day or 23.14 l/s, the discharge won’t affect the
travel of canoes on the canal and rvier
4.6. Socio-economical impacts
There’s no negative feedbacks from the nearby residential areas (around Mareng and
Thi Vai) on whether their socio-economical situations are affected by the project
4.7. Accumulated and integrated impacts
For Ma Reng Canal, after received the treated wastewater from the IP will still be able
to sustain the loads of parameters BOD, SS, As, Pb, Cd and Hg. Only COD already
over the river maximum pollution loads; due to the current pollution load of Mareng
is already higher than the Canal max pollution load. In that way, even when the
pollution loads from the CETP contribute unsinificant amount, the river still can’t
receive more loads.
Similarly for Thi Vai River, after received the treated wastewater from the IP will still
be able to sustain the loads of parameters BOD, COD, As, Pb, Cd and Hg. Only COD
already over the river maximum pollution loads; due to the current pollution load of
Mareng is already higher than the Canal max pollution load. So even when the
pollution loads from the CETP contribute unsinificant amount, the river still can’t
receive more loads
13
5. POLLUTION MITIGATION TOWARD NEARBY SURFACE WATER
5.1. Environmental Management Program
Construction stages
Water pollution mitigation measures
Air pollution mitigation measures
Mitigation measures for smpacts from solid wastes
Operation stages
Water pollution mitigation measures
Air pollution mitigation measures
Negative impacts mitigation for solid wastes
Negative impacts mitigation for sludges
5.2. Risks managements
Constructs stages
Measures to prevent and mitigate the impacts of these risks:
Risk of fires and explosions
Traffic Accidents
Risks associated with labour and health safety
Operation stages
Measures to prevent and mitigate the impacts of these risks:
Risk of fires and explosions
Risks associated with labour and health safety
Chemical leakage
Thunder/ lightning
Impactsassociated when the plant stop operating
5.3. Public consulting and Information publication
During the construct of this EMP, the project owner have consult the local government
(People Committee, Fatherland Front Committee) and the residents living in affected
areas
5.4. Capacity building
14
The project owners will carry own measuress to strengthen the capacity to react
against environmental and CETPworkers health risks.
5.5. Project owner organisation and responsibilties
The issues related to environmental management will be implemented by the CETP
Environmental Department as regulated plan
5.6. Environmental quality Monitoring
The project owners will be responsible for the monitoring of nearby surce water
sources, along with the periodic sampling of Nhon Trach 3. The results will be
presented to authorised body of local government as required
5.7. Costs and schedules of EMP
6. PUBLIC CONSULTING
The project owners carried out consultations with the following subject groups:
People Committee, Fatherland Front Committee of Long Tho Commune where
generally these two local governmental bodies have provided their opponents over the
proposal and the measures mentioned in this EMP
The residents living near the site and under effects of the project, where 17/24
agreed with the projects, while most of others does not give comments on it. The
residents also mentions the issues of flooding during rains and the stagnation of
effluent in the canal during the dry season
Commitment From Tin Nghia
The project owners commit to meet Vietnam regulations during the construction
and operations
The project commit to apply all of risks control measures as presented in the plan,
while promote internal capacity building and environmental awareness, to ensure best
environmental management plans for the project will be carried out. The project
owners will under full responsibilities if violating Vietnam regulations or International
Convention
15
PROJECT DESCRIPTION
1.1. PROJECT ORIGIN
In compliance with the existing regulations over the environmental qualities within
and surrounding Nhon Trach 3 Industrial Park, Tin Nghia Corporation have invested
in the implementation of a centralised wastewater treatment system (Module 1) in
Nhon Trach 3 Industrial Park - Phase 2, capacity of 2,000 m3/day and night. This
Module 1 central wastewater treatment system was officially put into operation since
November 2007, meeting wastewater treatment requirements and demands from Nhon
Trach 3 Industrial Park, and Vietnam environmental regulations.
However, due to the increasing number of facilities within the industrial park, the
wastewater discharge demand has been increasing rapidly. That’s why the project
entitled “Development of the CETP of Nhon Trach 3 IP - Phase 2 (Module 2) capacity
of 2,000 m3/day (the total capacity of two phases is 4,000 m
3/day) has been proposed
to meet the wastewater treatment demand in the industrial park.
Some facilities are currently under construction at the IP, and already sent the
notification on the expected operation time in 2012 and the estimated discharge
volume. Or more specifically:
Rohm & Haas Vietnam Co., Ltd: April, 2010. The estimated wastewater volume is
80 m3/day
Promax Textile Vietnam Co., Ltd.: July 2012; the estimated wastewater volume is
1,400 m3/day
YKK Vietnam Co., Ltd.: November 2012; the estimated wastewater volume is 250
m3/day.
By November 2012, the total wastewater volume of Nhon Trach 3 IP, Phase 2 will
increase to around 3,000 m3/day. To properly collect and treat this wastewater volume
to the existing requirement (Decision No. 1696/QD-BTNMT dated November 15, 2006
of MONRE on approving EIA report of Nhon Trach 3 IP, Phase 2), Tin Nghia has
been developing the second module to expand the total capacity of the wastewater
treatment facility of Nhon Trach 3 IP, Phase 2 to 4,000m3/day.
1.2. CETP OWNER
Nhon Trach 3 IP Investor Group: Tin Nghia Corporation
Representative: Mr. Quach Van Duc - Position: General Director
Address: No. 96, Ha Huy Giap Street, Quyet Thang Ward, Bien Hoa City, Dong
Nai Province.
Telephone No.:061.3822486 Fax No.: 061.3823747
The assigned unit to manage the services of infrastructures of Nhon Trach 3:
Nhon Trach 3 IP One member Affiliated Co., Ltd
16
Representative: Mr. Nguyen thanh Binh - Position: Director
Address: 25B Road, Hiep Phuoc Commune, Nhon Trach District, Dong Nai
Province.
Telephone No.:061.3822486 Fax No.: 061.3823747
1.3. CETP LOCATION
CETP Module 1 (existing) and Module 2 have the same location: Road No. 2, Nhon
Trach Industrial Park No. 3 - Phase 2, Nhon Trach District, Dong Nai Province. A map
that shows location of IZ and a map that shows the IZ, including service areas of
CETP Module 1 and Module 2 is illustrated in appendix 1.
1.4. CURRENT SITUATION OF TECHNICAL INFRASTRUCTURE IN NHON
TRACH INDUSTRIAL PARK NO 3 – PHASE II
The Industrial Zone is divided into two “phases”. Phase 1 is approximately the
northern third of the IZ and Phase 2 is the southern two-thirds (see map in Appendix
1). In Phase 1 we find 9 existing industries (all serviced by the CETP-Module 1) and
Formosa Industry which has its own pre-treatment and which does not send its effluent
to the IZ CETP; it is discharged separately.
Nhon Trach 3 IP, Phase II covers a total area of 360.5 ha. There are an additional 20
industrial enterprises in the Phase II which are also connected to the CETP-Module 1.
Future industries will be located in Phase II and will all connect to the CETP.
The IP’s EIA report was approved by the Ministry of Natural Resources and
Environment(MONRE) in Decision No. 1696/QD-BTNMT dated November 15, 2006.
The IP has been attracting various industries including garment and textile, footwear
and leather, machine manufacturing, food processing, medicine and cosmetics,
material technologies, interior decoration, wooden product processing and services
such as banking, telecommunication, public cleaning service, warehouse, workshop
rental among others.
Area: 360.5 ha with the construction area of 262.5 ha (65.7% of total area)
29 investment facilities’ licenses were granted so far in Nhon Trach 3 IP.
The occupied area: 126.95 ha; sharing 48%.
The unoccupied area: 136 ha; sharing 52%.
Tree growing area: 61.29 ha; sharing 17%.
1.4.1. List of Industries and Their Wastewater Treatment Capacity
The table below summarizes industries in Nhon Trach 3 IP, Phase 1 and Phase 2, with
their size and type of production (as of April 2012). All of these industries are
connected to CETP (Module 1 and Module 2).
17
Table 1: Industries in Nhon Trach 3 Industrial Park, Phase 2 and Phase 1
No Industries Production Area
(m2)
Wastewater
rate (m3/day)
Main polluting
parameters
Notes
I. NHON TRACH 3 IP – PHASE 2
OPERATING INDUSTRIES
01 Viet Long Packing Co.
Ltd. Paper packing manufacturing 50,000 70
COD=90, BOD5=52,
TSS=69, TN=32,
TP=2.4
Have pre-
treatment
plant
02 SPC Tianhua Co., Ltd
(Vietnam)
Manufacturing of chemicals
for wastewater treatment
industries
20,000 1
COD=79, BOD5=40,
TSS=66, TN=1.9,
TP=0.2
No pre-
treatment
03
Tin Nghia Construction
Material One-member
Affiliated Co., Ltd.
Brick and tile manufacturing 62,429 12
COD=8, BOD5=3,
TSS=10, TN=4.3,
TP=2.7, Color=7Pt-Co
No pre-
treatment
04 Shun Yin Ceramics
Materials Co., Ltd. Ceramics manufacturing 20,000 3
COD=22, BOD5=15,
TSS=58, TN=3,
TP=0.12, Zn=0.24
No pre-
treatment
05 Le Phan Construction
Co., Ltd. Fresh concrete manufacturing 20,613 13
TSS, heavy metal,
turbidity
No pre-
treatment
06 Ampharco Cosmetics
Joint Stock Co.
Pharmaceutical product
manufacturing 64,377 17
COD=159, BOD5=70,
TSS=20, TN=24,
TP=2.2
Have pre-
treatment plant
07 Bueno Technique Co.,
Ltd.
Manufacturing of valves and
Steeless steel spare parts 68,053 26
COD=120, BOD5=52,
TSS=45, TN=18,
Have pre-
treatment plant
18
No Industries Production Area
(m2)
Wastewater
rate (m3/day)
Main polluting
parameters
Notes
TP=2.0
08 CSB Battery Co., Ltd. Dry battery manufacturing 100,000 188
COD=82, BOD5=38,
TSS=66, TN=38,
TP=0.8
Have pre-
treatment plant
09 Velco Co., Ltd.
Machine and equipment
manufacturing for steel
industries
30,000 2
Heavy metal, inorganic
grease, TSS
No pre-
treatment
10 Kirby Southeast Asia
Co., Ltd. Steel structure processing 65,862 25
COD=110, BOD5=49,
TSS=68, TN=41,
TP=1.8
No pre-
treatment
11 EU Construction
Material Co., Ltd.
PVC door and partition
manufacturing 30,000 30
COD=29, BOD5=20,
TSS=36, TN=1.2,
TP=0.1
No pre-
treatment
12 Tan Tien Plastic JS Co. Plastic 50,000 5,5
COD=480, BOD5=84,
TSS=88, TN=1.2,
TP=0.2
No pre-
treatment
13 Towa Vietnam Co.,
Ltd.
Plastic home appliances
manufacturing 17,000 5
COD=77, BOD5=28,
TSS=58, TN=49,
TP=0.4
No pre-
treatment
14 Sammi Co., Ltd. Steeless steel wire and net
manufacturing 17,052 6
COD=35, BOD5=20,
TSS=36, TN=14,
TP=0.1
Have pre-
treatment
plant
15 An Lac Nhon Trach Toilet paper processing 24,000 4,5 Heavy metal, turbidity, No pre-
19
No Industries Production Area
(m2)
Wastewater
rate (m3/day)
Main polluting
parameters
Notes
Co., Ltd temperature, TSS treatment
16 Plust Vietnam Industry
Co., Ltd. Stationery manufacturing 30,000 12
COD=38, BOD5=21,
TSS=48, TN=10,
TP=0.1, Oil=4
Have pre-
treatment
plant
17
Y.S.P Vietnam Co.,
Ltd. (experimental
operation)
Pharmaceutical product
manufacturing 68,000 6
COD=55, BOD5=24,
TSS=41, TN=11,
TP=0.3
Have pre-
treatment
plant
18 Soltec Vietnam Co.,
Ltd.
Manufacturing of industrial
equipment, environmental
treatment equipment, industrial
steel pipe and construction
scaffolding
20,000 2
Heavy metal, inorganic
greases, TSS
No pre-
treatment
19 Kyowa Vietnam Co.,
Ltd.
Manufacturing of steel and
stainless steel components,
industrial pipe, industrial valve
and cranes
15,000 2
COD=85, BOD5=38,
TSS=45, TN=21,
TP=1.3
No pre-
treatment
20 Rohm and Haas Co.,
Ltd
Polymer chemical
manufacturing 40,764 -
Heavy metal, inorganic
greases, TSS
No pre-
treatment
II. NHON TRACH 3 IP – PHASE 1
OPERATING SERVICES AND THE SERVICE CENTER 16 HA
1 YoungTex Vina Co.,
Ltd.
Clothing industry
30,000 85
COD=192, BOD5=60,
TSS=160, TN=35,
TP=7.4
No pre-
treatment
20
No Industries Production Area
(m2)
Wastewater
rate (m3/day)
Main polluting
parameters
Notes
2 Sinpoong Vina Co.,
Ltd.
Zipper materials
10,000 14
COD=47, BOD5=22,
TSS=33, TN=2.0,
TP=0.5
Have pre-
treatment
plant
3 Hung Ta Co., Ltd. Steel industries
30,000 42
COD=263, BOD5=81,
TSS=53, TN=11,
TP=0.6
No pre-
treatment
4 TM Thai Nong Co.,
Ltd.
Pesticides pouring and
distributing 5000 8
COD=135, BOD5=47,
TSS=48, TN=42,
TP=3.3
Have pre-
treatment
plant
5 Kim Long Co., Ltd. Concrete manufacturing
21,000 14
BOD5, COD, heavy
metal, specific
chemicals
No pre-
treatment
6 Han Huu Co., Ltd. Concrete manufacturing
15,000 5
COD=37, BOD5=8,
TSS=54, TN=3.8,
TP=0.4
No pre-
treatment
7 Song Hui Co., Ltd. Under construction (office) 1,500 1
COD, BOD5, TSS, TN,
TP
No pre-
treatment
8 Tung Kong Co., Ltd. Aquaculture product
processing 12,000 32
COD, BOD5, TSS, TN,
TP, color
No pre-
treatment
9 Service providing
center/ supermarket
Office rent for companies in
the IP 160,000 29
COD=57, BOD5=28,
TSS=65, TN=15,
TP=2.4
No pre-
treatment
21
Furthermore, based on Decision 2376/QĐ-UBND dated 24/7/2008 of Dong Nai
People’s Committee, the project treatment plant will also collect the wastewater
from facilities from Formosa (of Nhon Trach 3 IP- Phase 1) and 51.73 ha of Tin
Nghia service center. At this moment the CETP also collects and and treats waste
water from the 16 ha of Tin Nghia service center .
Industrial wastewater of industries in Nhon Trach 3 IP, Phase 2 will be treated and
meet the wastewater treatment contract prior to discharging (attached Table of
Allowable Limits of Concentration of Parameters prior discharging to the wastewater
treatment system of Nhon Trach III in the appendix).
Thus, the entire amount of waste water flowing to CETP of Nhon Trach 3 - Phase 2
(Module 1) includes the industries in Nhon Trach 3 IP - Phase 2 which are listed in
Table 1 and the industries in Nhon Trach 3 IP - Phase 1 which are listed in the same
table. The area where CETP of Nhon Trach 3 - Phase 2 (Module 1) received waste
water is shown in appendix 1.
In Nhon Trach 3 IP - Phase 2: the wastewater discharge system of 20 operating
industries has been connected to the CETP as signed under wastewater treatment
contract with the Infrastructure Management Unit. Among them, 7 already have
their own treatment systems for pre-treatment before being discharged into CETP
of Nhon Trach 3 - Phase 2 (Module 1), they are shown in Table below.
Table 2: The industries in Nhon Trach 3 IP - Phase 2 have pre-treatment system
No Name Production
Waste water
system treatment
rate (m3/day)
1 Viet Long Packing Co. Ltd. Paper packing
manufacturing 70
2 Ampharco Cosmetics Joint
Stock Co.
Pharmaceutical
product
manufacturing
17
3 Bueno Technique Co., Ltd.
Manufacturing of
valves and Steeless
steel spare parts
26
4 CSB Battery Co., Ltd. Dry battery
manufacturing 188
5 Sammi Co., Ltd.
Steeless steel wire
and net
manufacturing
6
6 Plus Vietnam Industrial Co.Ltd Office stationary
manufacturing 12
7 Y.S.P Vietnam Co., Ltd.
(experimental operation) Pharmaceutical
product 6
22
No Name Production
Waste water
system treatment
rate (m3/day)
manufacturing
Total 325
Source: Nhon Trach 3 IP One member Affiliated Co., Ltd
In Nhon Trach 3 IP - Phase 1: two of nine industries have their own treatment systems
for pre-treatment before being discharged into CETP of Nhon Trach 3 IP – Phase 2,
they are shown in Table below:
Table 3: The industries in Nhon Trach 3 IP - Phase 1 have pre-treatment system
No Name Production
Waste water system
treatment rate
(m3/day)
1 Thai Nong Co. Limited Pesticides Pouring 8
2 Sinpoong Vina Co. Limited Zipper Manufacturing 14
Source: Nhon Trach 3 IP One member Affiliated Co., Ltd
The CETP of Nhon Trach 3 - Phase 2 (Module 1) have original capacity of is
2,000 m3/day the system has been receiving and treating wastewater of operating
industries in the industrial park. Currently the average wastewater volume is 780
m3/day; peaking at 1,346 m
3/day.
Wastewater is treated to meet Vietnam National Regulation QCVN
40:2011/BTNMT; column B, Kq=1.1; Kf=1,0 prior discharging through Lo Ren
Discharge Point, and ultimately into Thi Vai River.
The CETP of Nhon Trach 3 - Phase 2 (Module 1) addition of the treatment facility
was examined and certified by Dong Nai Department of Natural Resources and
Environment at Official Document No. 652/TNMT-CCBVMT dated March 18,
2010 and by Dong Nai People’s Committee under license No. 3571/GP-UBND in
December 1, 2009 (see attached documents in the appendix).
The company also has installed an automatic monitoring system to monitor the
effluent quality (flowrate, pH, DO, TSS, COD, temperature).
1.4.2. Wastewater Collection System
The slope is inclined toward south west: with the elevation varies from 1 to 3.5 m.
Wastewater is classified into two storing basins N1 and N2. In each basin, the
wastewater is ran through reinforce concrete box culvert D300 – D400 – D600 and
through the primary culvert system D800 – D1000 – D1200 to the centralised
wastewater facility via D1500 culvert line. The wastewater discharge culverts are
RC culvert, with manholes at the interval of 40-50 m along the culvert long. The
sewage system covers total length of 15,704 m, comprising of D300 = 10,038 m,
23
D400 = 1,777 m, D600 = 1,489 m, D800 = 982 m, D1000 = 1,188 m, D1200 = 210
m, D1500 = 56 m.
Currently, the construction of the entire system of waste water collection Tin
Nghia Company has been completed.
The treated wastewater is discharged to the environment via open ditch concrete
culvert canal (B4000, 235 m in length) and closed box culvert (B3000, 524.3 m in
length) before being discharged into Lo Ren Canal, and ultimately ends up in Thi
Vai River.
1.4.3. Drainage System
Tin Nghia Corporation also developed the drainage system. The drainage system is the
RC culvert, covering 30,211.4 m long, comprising of D600 culvert = 2,042 m, D800 =
6,905.6 m, D1000 = 7,020.2 m, D1200 = 485.6 m, D1500 = 11,254.2 m, open ditch
B2000 = 997.5 m, B4000 = 982 m, and closed box culvert B3000 = 524.3 m.
People’s Committee of Nhon Trach District has only invested in the development
of the drainage system along Road 25C. Companies along Road 25C (in Nhon
Trach 3 IP, Phase I and Phase II) will have to continue the development and
connect to the drainage system.
When the local goverment develops the drainage system along Road 319B, the
private sector will have to continue implementing a drainage system to connect
from Youngtex Vina to the current one
The stormwater in Nhon Trach 3 IP, Phase II is collected into the above concrete
culverts, is run along the internal roads before being discharged to open ditch (the
same one hosted the treated wastewater from the central wastewater treatment
system) then being discharged into Mareng canal, and ultimately ends up in Thi
Vai River.
1.4.4. Industrial waste management
1.4.4.1. Wastewater Treatment System
CETP of Nhon Trach 3 - Phase 2 (Module 1) has a capacity of 2,000 m3/day, and is
already under operation since 11/2007.
Wastewater from Nhon Trach 3 IP - Phase 2 (module 1) is treated by two steps as
follows:
1st Step (facilities own treatment): the wastewater from private companies will be
treated preliminarily, to meet the influent standard of IP centralised treatment
plant.
2nd
Step (centralised treatment): Preliminarily treated wastewater is collected into
the centralised treatment facility of the industrial park for further treatment (and to
24
meet the QCVN 40:2011/BTNMT – National Technical Regulation on Industrial
Wastewater, Column B, Kf=1.0, Kq=1.1) prior discharging into the environment
1.4.5. Solid Waste Management
Based on the collected information, 17 of total 20 companies there have already been
granted “Hazardous solid waste registration books”. The last 3 companies are
preparing paperwork to get the hazardous waste owner registration book.
1.4.5.1. Solid Waste Management of Nhon Trach 3 IP One member Affiliated Co.,
Ltd.
The IP got the hazardous waste registration book No. 587/SĐK-TNMT dated
November 5, 2010, with hazardous solid waste management code No. 75001375.T.
Domestic solid waste: The IP contracted Ha Long Bay Co., Ltd to collect the
domestic solid waste properly (attached with the report is the solid waste collection
contract).
Hazardous Solid Waste: The IP contracted Tai Tien Co. Ltd to collect, transport
and treat hazardous solid waste appropriately.
1.4.5.2. Solid Waste Management at Industries in Nhon Trach 3 IP, Phase 2
Nhon Trach 3 IP One-member Affiliated Co. Ltd. constructed the solid waste transit
sites and signed the solid waste collection and transport with all companies within the
IP. In addition, the company has also negotiated with hazardous solid waste disposal
agencies (as mentioned above) to deal with them appropriately (following Circular
No. 12/2011/TT-BTNMT dated April 14, 2011 of MONRE on hazardous solid waste
management).
Nhon Trach 3 IP One-member Affiliated Co. Ltd. Also requested enterprises sorting
out wastes at the discharge sources and store appropriately before delivering to the
competent agency (the provisions of the land leasing contract).
The solid waste volume is specified as follows:
The domestic solid waste is estimated at 17.423 tons per month, which is mainly
collected by Nhon Trach 3 IP One-member Affiliated Co., Hiep Hoa Cooperative,
Nhon Long Trade and Service Cooperative among others.
Non-hazardous solid waste is estimated at 58.422 tons per month, which is mainly
collected by Bay Ha Long Co., Ltd, Kim Xuan Private enterprise, Tuoi Sang
Environment Co., Ltd and private recycling units.
The hazardous solid waste volume is 98.252 ton per month which is collected by
Green Viet Environmental Production and Trade Co., Ltd, Viet – Uc Environment
Co., Tai Tien Co., Ltd., among others.
1.4.6. Transportation System
25
The internal road system of the industrial park run horizontal and diagonal along three
main roads of the city. The ROW of the industrial park roads is as follows:
1. Main Industrial Park Road: Road 4D is the primary road in the industrial park (D is
the code of north – south roads)
ROW width: 47.00 m, double road.
Carriage lane width: (3 lanes x 3.75 m/lane) x 2 + 1.5m = 24.00 m.
Median: 3.00m.
Sidewalk and technical corridor on each side: 10.00m.
Step back on each side: 15.00m.
Cross-section code No. 7 – 7.
2. Secondary Road: comprising of Roads 1N and 6D (N: east – west roads)
ROW width: 36.00 m.
Carriage lane width: 20.00 m (4 lanes x 3.75 m/lane) = 15.00 m.
Parking lane: 5.00 m.
Sidewalk and technical corridor on each side: 8.00m.
Setback on each side: 15.00 m.
Road cross-section No. 4 – 4.
3. Tertiary Roads: Roads No. 3D, 5D, 7N and service road along Provincial Roads
25C and 319B.
Roads No. 3D and 5D:
+ ROW width: 31.00 m.
+ Carriage lane width: (4 lanes x 3.75 m/lane) = 15.00m.
+ Sidewalk and technical corridor on each side: 8.00m.
+ None stepback.
+ Road cross-section No. 5 – 5.
Road 7N:
+ ROW width: 19.50 m.
+ Carriage lane width: (2 lanes x 3.75 m/lane) = 7.50m.
+ Sidewalk on each side: 6.00m (Cross-section 6 – 6).
Service roads along PR25.C and PR319B:
+ ROW width: 18.50 m.
+ Carriage lane width: (2 lanes x 3.75 m/lane) = 7.50m.
+ Sidewalk on industrial land lots: 8.00m; sidewalk on PR25C and PR319B: 3.00m
(Cross-section 1 – 1 and 2 – 2).
26
The road system of the industrial park covers 12,416.94 m (rounding to 12.42 km).
The primary roads, secondary and tertiary roads have been completely developed.
Road area covers 36.64 ha and 1.12 ha depot, increasing the total transport land to
37.72ha, sharing 10.75% of the industrial park area. If one half of the primary road
system of the city is included the total road area of the industrial park increases to
37.74 ha + 17.29 ha = 55.03 ha (rounding to 55ha, sharing 15.67 % (see Table of Road
Inventory and Main Specifications).
1.4.7. Risk Management
The investor will take proper measures to prevent and response to environmental
incidents and risks as follows
1.4.7.1. Fire and explosion
(1). Fire and Explosion Prevention
Workers who work directly at the construction site will be trained on fire and
explosion methods.
Inflammable solvents and fuel shall be stored at isolated warehouses, far from
ignition sources.
Provide fire and explosion prevention and fighting equipments at fuel warehouses;
Provide proper fire and explosion prevention and fighting equipments in
compliance with existing regulations;
(2). Counter-measures
Follow PCCC approved methods by the PCCC
1.4.7.2. Chemical and Fuel Spill
(1). Preparedness
Departments/divisions who utilize chemical, fuel and lubricant shall be equipped
with proper equipment to store clout.
Annually, the team leader shall disseminate emergency preparedness and response
knowledge to the team members.
In every six months, the company shall formulate the emergency response
rehearsal; record the rehearsal minutes of meeting properly.
(2). Response
The management board shall establish the emergency-aids team properly. The
office staff is responsible to send the notice to all workers and staffs.
Any individual who discovers the fuel/chemical spill shall report immediately to the
in-charge staff of the emergency-aids team. If he could not contact with the person-in-
charge he shall report to the team leader.
27
The authorized person in each zone shall review the situation and take immediate
measure. If the incident is not related to fuel/chemical spill the authorized person shall
direct the site clearance properly. If it is fuel and chemical spill that affects to
environment or public health prompt measure shall be taken to cope with the situation
and separate the site until the incident is addressed.
Persons-in-charge shall minimize environmental pollution and impacts on people’s
health.
In case insufficient resources to address the incident, it should be reported to
competent agency to get the support.
When the incident is solved the authorized person shall report to EMR on solving
situation.
If the incident could not be solved completely and could cause pollution or people’s
health, the team leader shall report to EMR and competent agencies for necessary
intervention.
1.4.7.3. Power Shortage
(1). Preparedness
The company shall prepare list of electric generator leasing companies (name,
address, contact number, email, etc.). Selection of a generator leasing company shall
be conducted properly to select the most suitable agency.
When receiving the power cut notice, the office shall confirm to the centralized
wastewater treatment facility. The facility manager is responsible to hire the generator
properly.
(2). Response
In case of sudden power cut the operator shall confirm to the facility management
and contact to the generator leasing company immediately to hire the generator and
operate within 6 hours.
The generator shall be operated to supply power for the treatment system. The
generator operation shall be in compliance with the guideline of the generator leasing
company.
1.4.7.4. Failure of the Wastewater System
The wastewater system failures are comprised of pipe broken, flooding rainwater, etc.
(1). Preparedness
Proper equipment and tools shall be prepared to close the pipe broken and repair.
In every six months, the company shall formulate the emergency response
rehearsal; record the rehearsal minutes of meeting properly.
(2). Response
28
In case of incident confirmation from the operation staff, cleaning team or other
sources, the technical department/the centralized wastewater treatment facility shall
response to the incident immediately. In case of insufficient resources, it shall be
reported to the manager immediately.
1.4.7.5. Failure of the Treatment System
(1). Preparedness
The treatment system manager shall assign staff to conduct the maintenance as
scheduled.
The operator shall prepare proper tools for repairing properly.
The treatment system leader shall prepare the list of maintenance or repairing
agencies adequately.
(2). Response
The operator or anyone who detects the failure (equipment damage, components of
the treatment system, among others) shall report immediately to the repairing and
maintenance manager. In the guarantee period, the manager shall contact to the
guarantee agency properly.
If the failure is out of the corporation control the manager shall conduct with the
repairing and maintenance agencies.
The repairing shall be conducted within 6 hours since the failure occurs.
Remark:
In the rehearsal cases, the team leader shall evaluate the rehearsal results and
requirements on activities to have experiences for the afterward turns.
After every incident solving turn, the team shall address the issue properly, preventing
impacts on environment.
Currently, the project owner have finished the construction of finishing ponds, with
size 34m x 107.3m x 2.2m and holding a volume of 8,026 m3. This will also
temporarily storing the waste water if the CETP stop working.
1.5. DESCRIPTION OF CETP OF NHON TRACH 3 IP – PHASE 2 (MODULE
2)
1.5.1. Treatment Technology, Influent and Effluent Characteristics
Based on a) the actual condition and requirement of Nhon Trach 3 IP, b) the influent
characteristics, and c) the Module 1 technology for the wastewater treatment plant;
Module 2 technology for Nhon Trach 3 IP CETP can be described as below:
29
1.5.1.1. The Step-By Step Processes of the Treatment Plant
Preliminary and Primary Treatment:
+ Removal of wastewater constituents (rags, sticks, floatables, grits…).
+ Chemical treatment (mixing and flocculation).
+ Removed floating oils and greases.
Secondary treatment (remove biodegradable organics):
+ Aerobic treatment to removal biodegradable nutrients, BOD, COD.
Tertiary treatment:
+ Advanced treatment by remove residual suspended solid and dissolved materials.
+ Disinfection.
Sludge treatment:
+ Dewater and compact the dried sludge.
The more detail processes of the plant is presented in Section 1.5.2.2.
1.5.1.2. Actual Influent and the Required Effluent Characteristics
The influent for CETP of Nhon Trach 3 IP – Phase 2 (Module 2) will have similar
characteristics as CETP of Nhon Trach 3 IP – Phase 2 (Module 1) waste water. Based
on the design, the influent characteristics of the CETP of Nhon Trach 3 IP – Phase 2
(both Module 1 and Module 2) requirements that industries have to meet through pre-
treatment is:
+ Average BOD5 : ≤ 600 mg/l
+ Average COD : ≤ 1,000 mg/l
+ TSS : ≤ 300 mg/l
+ Colour : ≤ 100 Pt-Co
+ pH : not limited
+ Other parameters based on Regulation C of Vietnam.
The effluent characteristics have to meet the national regulation QCVN 40:
2011/BTNMT, Column B, Kq=1,1; Kf=1,0
1.5.2. Characteristics of CETP and sluice-gates
1.5.2.1. Characteristics of wastewater
(1). Wastewater profiles
Wastewaters toward the CETP of Nhon Trach 3 IP – Phase 2 is industrial and
domestic wastewater which being generated by the operating facilities and workers
onsite.
(2). Influent profiles
The influent wastewater profiles of the industries within the IP are presented in table
below. All of industries which connected to CEPT of Nhon Trach 3 IP – Phase 2 must
30
send their environmental monitoring report to Nhon Trach 3 IP (1 time per three
months) to prove that their waste water meet the influent standards of CEPT.
(3). Effluent required characteristics
The effluent characteristics have to meet the national regulation QCVN 40:
2011/BTNMT, Column B, Kq=1.1; Kf=1.0.
(4). Assess the wastewater characteristics with available standard
As the technology from Module 2 of the CETP is similar is to Module 1, therefore the
reports used the influent and the effluents waste water characteristics of Module 1 and
place it against the “National regulation on industrial waste water discharge” QCVN
40:2011/BTNMT (column B) as below
Table 4: Influent and the effluents waste water characteristics of Module 1 versus the
QCVN 40:2011/BTNMT
No Parameters Units Influents Effluents Efficiency
(%)
QCVN
(***)
1 pH - 7.2 7.2 - 5.5 - 9
2 Colour
(pH=7) Pt-Co 31 24 22.6 165
3 BOD5 mg/l 31 11 64.5 55
4 COD mg/l 80 32 60.0 110
5 TSS mg/l 58 20 65.5 165
6 As mg/l 0.038 0.034 10.5 0.011
7 Hg (**) mg/l
Undetected
(LOD=0.000
3)
Undetected
(LOD=0.0003) - 0.55
8 Pb mg/l Undetected
(LOD=0.01)
Undetected
(LOD=0.01) - 0.11
9 Cd mg/l Undetected
(LOD=0.005)
Undetected
(LOD=0.005) - 0.55
10 Cr6+
mg/l Undetected
(LOD=0.043)
Undetected
(LOD=0.043) - 0.11
11 Cr3+
mg/l Undetected
(LOD=0.025)
Undetected
(LOD=0.025) - 1.1
12 Zn mg/l Undetected
(LOD=0.1)
Undetected
(LOD=0.1) - 2.2
13 Ni mg/l Undetected
(LOD=0.06)
Undetected
(LOD=0.06) - 5.5
14 Fe mg/l 0,52 0,27 48.1 3,3
15 CN- mg/l
Undetected
(LOD=0.005)
Undetected
(LOD=0.005) - 0,11
16 Phenol mg/l Undetected
(LOD=0.01)
Undetected
(LOD=0.01) - 0,55
17 Cl2 mg/l Undetected Undetected - 2.2
31
(LOD=0.1) (LOD=0.1)
18 S2-
mg/l 0.063 Undetected
(LOD=0,002) 96.8 0.55
19 N-NH3 mg/l 12.9 0.98 92.4 11
20 TN (*) mg/l 15.7 Undetected
(LOD=0,01) 99.9 44
21 TP mg/l 2.7 2.06 23.7 6,6
22 Inorganic
Greases (*) mg/l Undetected Undetected - 11
23 Coliforms
(**)
MPN/100
ml 1400 110 92.1 5,5
24
Organophos
phate
pesticides
(**)
mg/l - - - 1,1
Source: Tin Nghia 05/2011.
Note:
(*): parameters which has not yet acknowledged by Vilas (Bureau of Accreditation
Vietnam)
(**): was sampled by HCM ENTEC
(***): QCVN 40:2011/BTNMT Column B Kq=1.1;Kf=1.0
LOD: Limit of Detection
As seen, many parameters of module 1 does not meet the regulation QCVN
40:2011/BTNMT column B with Kq=1.1; Kf=1.0.
1.5.2.2. Characteristics of CETP
(1). Wastewater collection systems
All waste water from the IP is collected with a concrete drainage system, through
D1.500 pipe toward the treatment plant.
From the CETP, the treated wastewater is discharged through a network of 235 m
open ditches, and 524.3 m closed pipes (total length of 759.3 m).
The purpose using the 235 m open ditches is 1) To keep original landscape; 2) To
monitor the storm water drainage (to avoid the industries discharge the waste water
into environment .through the open ditches). .
(2). Treatment Technology Description
The treatment technology is described in Figure below
32
Figure 1: CETP diagram
Technology description:
Waste water from factories in industrial zones flows in the drainage system into
manhole of the CEPT. Before entering the pump house, waste water is passed through
the rough screen to remove the large solid residue out of the flow. From the pump
SORT AND
TREAT APPROPRIATELY
PUMP
GRIT REMOVAL
GREASE TRAP
FLOTATION
PRIMARY CLARIFIER
EQUALISER
FLOCULATION
AERATION TANK
CLARIFIER
DISINFECTION AND MONITOR
STABILISING POND
SLUDGE DEWATERING
COMPRESSOR
SLUDGE TANK
Slu
dg
e W
ater
Disinfector
Nutrients
Oxygen
INFLUENT
SCREENING
pH stabiliser
Oxygen
EFFLUENT
33
house, the waste water be pumped the fine screen to remove the solid residue, which is
larger than 1.5 mm, then flow into grease trap tank. In the grease trap tank, grease is
removed ot of the waste water, then waste water continue flows into the equaliser tank.
The equaliser tank is arranged the blades system to mix the component, behaviour
of the waste water to avoid the solid sedimentation, coinstantaneous, the equaliser tank
is installed the add-in chemical system to neutralize the pH of waste water.
From the equaliser tank, waste water continue to be led through the physical and
chemical treatment systems. the wastewater will be treated with chemical through
flocculation and flotation process in primary clarifier. The clarifier will separate the
residue/sludge from influent, before it’s running through the aeration tank where being
treated with activated sludge (aerotank).
Organic substances treatment by aerotank is aerobic activated sludge suspended
technology, in continuous agitation. The operating principle of the aerotank is an
application of the growth of aerobic microorganisms - under the influence of supplied
oxygen from the air through the aerator and plates smooth foam – it helps
microorganism decompose organic matter, converting them into CO2, H2O, inorganic
products and new biological cells.
The wastewater after being treated with the aerobic process, will be run through the
secondary clarifier. Some of the sludge from the secondary clarifier will be fed back to
the aerobic tank to provide the foods and maintain the level of microorganism inside
the aerobic tank. The rest of the sludge will be pumped out for dewatering and further
treatment. The treated wastewater will then be pumped into disinfection tanks for
disinfections and monitoring
The stabilising pond acted as buffer to further treat the water before it’s released
into the environment.
1.5.2.3. Characteristics of wastewater discharge
(1). Discharge System
1). Technical aspects of discharge system
(a). Industrial wastewater discharge
At the centralized wastewater treatment plant, after treated wastewater is discharged
through Lo Ren canal (the regional discharge channel) through a network of open
ditches B4000, and closed pipes B3000, with a total length of 759.3 m (B4000= 235
m, B3000 = 524.3 m)
(b). Storm water drainage discharge
Storm water is collected by the drainage system running along the internal roads (as
mentioned previously), then is gathered and discharged through the drain pipe along
D6 road. Finally the storm water is discharged through Lo Ren canal along with the
treated wastewater from the treatment plant
34
Currently all of the firms within the IP have connected their wastewater drainage
system toward the IP’s centralized wastewater treatment plant; no industries have self
treatment and discharged into the stormwater pipeline
(2). Discharge method
As mentioned above, waste water after treatment will be flown through the open
ditches B4000, then closed pipes B3000 before being directed along the upper stream
of Lo Ren canal (along regional slopes toward southeast), and finally is discharged
into Thi Vai River.
(3). Discharge Schedule
The wastewater treatment plants used the combination of chemical and biological
treatment methods (BNR), so wastewater treatment system is operated 24 hours a day.
(4). Discharge flow rate
In the first 6 months of 2012, we have:
Maximum discharge flow rate is 1,364 m3/day;
Minimum discharge flow rate is 325 m3/day;
Averaged discharge flow rate (the first 6 months of 2012) is 780 m3/day.
1.5.3. Sludge treatment technology
On sludge treatment: sludge from primary and secondary clarifiers will be pumped out
for solidified and dewatered (with mixing). Solidified and dewatered sludge are mixed
with polymer before finally being compressed. This mud, and the greases from the
container will be treated as hazardous wastes. Water from sludge in these processes
will be pumped back and mixed with the influent.
1.5.4. Total investment and Progression pace of the Wastewater Treatment Plant
1.5.4.1. Project total investment
Table 5: Projected investment
No Items Units Prices
(VND)
Costs
(VND)
I. Investment before taxes 13,412,388,000
Investment before Tax 12,193,080,000
VAT 10% 1,219,308,000
1 Wastewater Pump
Already constructed during phase 1,
have capacity for phase 1& 2
2 Disinfection Tank
3 Biological tank
4 Sludge Tank
35
No Items Units Prices
(VND)
Costs
(VND)
5 Laboratory
6 Administration Building
7 Chemical warehouse
8 Equalisation Tank 1 3,987,600,000 3,987,600,000
9 Flocculation Tank 1 23,250,000 23,250,000
10 Flotation tank 1 120,900,000 120,900,000
11 Primary Clarifier 1 447,330,000 447,330,000
12 Grease Trap 1 72,850,000 72,850,000
13 Aerobic Tank 2 2,926,600,000 5,853,200,000
14 Secondary Clarifier 1 1,687,950,000 1,687,950,000
II. Investments in machines and
equipments 7,544,863,333
Equipment Investment before tax 6,858,966,667
VAT 10% 685,896,667
A. Equipments
1 Wastewater Pump 2 406,560,000 813,120,000
2 Transition wastewater pump 2 102,666,667 205,333,333
3 Blower for aerating of stabilizer 1 88,150,000 88,150,000
4 Aerating system for stabilizer 1 97,000,000 97,000,000
5 Acid, alkaline storage tanks 2 5,666,667 11,333,333
6 Acid, alkaline injectors 2 23,232,000 46,464,000
7 Mixer for flocculation tank 1 35,200,000 35,200,000
8 Mixer for flotation tank 1 68,400,000 68,400,000
9 Tank to mix chemicals for
flocculation 1 5,666,667 5,666,667
10 Mixer to mix chemicals for
flocculation 1 35,200,000 35,200,000
11 Injector for flocculation 1 48,400,000 48,400,000
12 Tank to mix chemicals to aid
flocculation process 1 22,666,667 22,666,667
13 Mixer to mix chemicals to aid
flocculation process 1 35,200,000 35,200,000
14 Injector to aid flocculation
process 2 42,592,000 85,184,000
15 Equipment to wipe sludge from
primary clarifier 1 281,600,000 281,600,000
16 Sludge pump of primary clarifier 1 64,533,333 64,533,333
17 Blower for aerating of aerobic
tank 3 179,000,000 537,000,000
18 Aerating system for aerobic tank 1 490,200,000 490,200,000
19 Nutrient mixing tank 1 5,666,667 5,666,667
20 Nutrient mixer 1 35,200,000 35,200,000
21 Nutrient pump 1 23,232,000 23,232,000
36
No Items Units Prices
(VND)
Costs
(VND)
22 Equipment to wipe sludge from
secondary clarifier 1 354,666,667 354,666,667
23 Cycling sludge pump of
secondary clarifier 3 82,133,333 246,400,000
24 Sludge pump for treatment of
secondary clarifier 2 67,466,667 134,933,333
B. Pipes, walking platform
33 Pipelines 1 1,066,666,667 1,066,666,667
34 Ladders, walking platform 1 70,000,000 70,000,000
C. Monitoring equipments
35 Automatic pH monitoring 1 55,100,000 55,100,000
36 DO measurer 1 62,700,000 62,700,000
37 Flow rate measurer using
ultrasonic waves 1 104,500,000 104,500,000
38 Water level switch 3 5,700,000 17,100,000
D. Electrical system 1 1,336,000,000 1,336,000,000
E. Automatic control system
39 PLC 1 332,500,000 332,500,000
Total 20,957,251,333
Other 2,095,725,133
TOTAL INVESTMENT 23,052,976,467
The above cost does not include costs from administration, technology transferring,
and interest rates
1.5.4.2. Operating costs of the CETP
Due to the CETP of Nhon Trach 3 IP – Phase 2 (Module 2) similar to Module 1, The
operating cost of the CETP Module 2 also the same with Module 1. The operating cost
of the CETP Module 1 to treat 1 m3 can be calculated based on daily costs divide to
the plant treatment capacity. These costs based on CETP running with the real data in
the first 6 months of 2012.
Table 6: Daily operating cost
No Items Cost (VND/day)
1 Operating labour costs 1,160,493
2 CETP amortisation 3,486,257
3 Chemicals 683,030
4 PTN Chmicals 40,920
5 Power 1,764,112
6 Sludge treatment 5,880,000
7 Domestic water 140,936
37
No Items Cost (VND/day)
8 Maintenance costs 150,000
Total 13,305,749
Considering the CETP treatment rate is 2,000 m3/day, the treatment cost for each m
3 of
treated waste water will be 6,653 VND.
1.5.4.3. Operation schedule of CETP
June to August 2012: finish legal documents
August to December 2012: start the construction
January 2013: implement machineries, equipments
February 2013: pilot run
March- April 2013: technology transfer, take over and transfer
Pictures of the CETP Module 1:
Figure 2: Wastewater pump
38
Figure 3: treatment tanks
Figure 4: Finishing pond
Figure 5: Automatic effluent quality monitor
39
Figure 6: Sludge treatment
Figure 7: Labs in CETP environmental department
40
CHARACTERISTICS OF THE PROJECT AREA
2.1. GENERAL CHARACTERISTICS OF PROJECT AREA
2.1.1.1. Geography and Climate
(1). Geography
Based on planning land use for Long tho Commune :
63.51% of the commune is located on top of the alluvial deposit, with an area of
1,541.81 ha
29.10% of the commune is located on top of marine sediment rocks, with an
area of 706.53 ha
The basic geography is divided in these 3 categories :
High terrains: toward the West of the Districts, along the 319 road toward
Provincial War Memorial. 3 – 80
slope with solid foundation, suitable for planting
long-growth plants such as rubber, fruit frees, cashew nut, or constructing industrial
zones
Medium terrains: toward the East of Road 19, the transition zone between the hills
and mangrove areas, <30 slopes. Suitable for residential areas, garden and rice farming
Is affected by tides, and have weak foundations for construction. Suitable for
mangroves or agricultural farming.
In general the terrain slop toward South West, with the highest terrain in North East
50-55m, while the low land in South West, 5-10 m
(2). Climate
The high temperatures around the years are suitable for plant growing and farming
The average annual temperature is 270C, highest at April with 27.3
0 – 30.7˚C, and
lowest at December at 24.80C. Max recorded temperature is 38
0C while min is 18
0C.
The variety of temperatures during wet season is 5.5 - 80C, and dry season is 5 - 12
0C.
The humidity around the year is around 78 – 81.4%, with 85 – 93% during rainy
season, and 68 - 83% during dry season. Peak humidity at 95% and lowest at 50%
Rainfall is from 1,800 to 2,300 mm annually. Rainfall is not distributed evenly with
really high rainfall during August, September, October, some month even reach 500
mm per month. The dry season from November to April only have 10% of the whole
year rainfall, with months like February may not even have rain. Due to the
geography, the regional agriculture depends almost on rain, with vegetables farming
on the hill and 1-2 rice farming seasons a year
Wind direction: have two main wind directions separate by seasons. During rain
season, the wind flow toward South West, during dry season, wind flow North East-
41
ward. There are some transition periods where winds blow East or South East. Wind
speed is around 2.1-2.5 m/s, and peak at 25 m/s. The region is affected little by storms
The statistics in 5 years below includes: temperatures and humidity (from Bien Hoa
station), rainfall (from Long thanh Station)
Average temperature through the year in Dong Nai is in table below.
Table 7: Monthly temperature from 2007 to 2011 – Dong nai province
Unit: 0C
2007 2008 2009 2010 2011
Annual average 26.9 26.7 26.8 27.9 27.5
January 25.2 25.8 25.0 26.5 26.1
February 26.6 25.0 26.4 27.8 27.0
March 28.1 27.2 28.8 28.9 27.6
April 29.0 28.5 27.5 29.9 28.5
May 28.6 27.3 29.0 30.7 28.7
June 27.3 29.1 28.4 28.5 28.0
July 26.9 27.6 26.0 27.5 27.5
August 26.7 26.7 27.2 27.6 27.9
September 26.7 25.7 26.4 27.9 27.5
October 26.3 27.0 27.3 26.9 27.3
November 25.9 25.9 26.2 26.7 27.6
December 25.0 25.3 24.8 26.6 26.5
Source: Hydrometeorology Division of South East Vietnam
Humidity:
Table 8: Monthly humidity from 2007 to 2011 – Dong nai province
Unit: %
2007 2008 2009 2010 2011
Annual average 81 79.8 81.4 78 78
January 71 74.5 75 74 75
February 68 71.7 80 70 70
March 74 71.0 76 69 71
April 72 73.1 83 70 73
May 84 78.6 79 72 79
June 86 83.7 81 81 80
July 88 84.7 84 85 83
42
August 87 85.3 86 83 82
September 88 85.9 87 83 86
October 88 86.2 88 85 85
November 83 83.5 80 83 81
December 78 79.0 78 79 76
Source: Hydrometeorology Division of South East Vietnam
Rainfall
Table 9: Average annual rainfall Dong Nai
Unit: mm
2007 2008 2009 2010 2011
Annual rainfall 2,335 2,080 1,993 1,957 2,0179
January 13.0 8.1 14.0 26.3 10.2
February 4.7 8.4 5.5 0.0 0
March 70.6 12.5 13.9 13.5 54.2
April 59.6 72.9 60.9 8.8 35.5
May 280.3 382.3 211.3 128.5 289.5
June 270.3 162.1 282.6 165.7 271.5
July 366.1 336.9 323.0 338.2 414.5
August 349.0 266.7 297.3 261.2 219.0
September 450.0 433.8 352.3 157.3 407.0
October 260.5 211.0 280.0 504.3 250.7
November 205.3 160.0 109.0 293.7 201.7
December 5.6 25.4 42.9 59.2 25.6
Source: Hydrometeorology Division of South East Vietnam
(3). Surface water
Wastewater from Nhon Trach IP – Module 2 will be discharged through Lo Ren
Discharge point, into Mareng Canal, before finally being discharged into Thi Vai
River. At Rach Mieu Section, the Ma reng flowrate is <2 m3/s during dry season, and
<10 m3/s during wet/rain season.
2.1.1.2. River and Open Water Network
Thi Vai River is the wastewater receiving body for all of Nhon Trach 3’s wastewater.
The river has a length of 76 km, start from Long Thanh Commune toward Chau thanh,
before meet the South China Sea at Rach Gai Bay. Downstream, the river joins with
43
Saigon- Dong Nai at some sections. The average river width is 400 – 650 m, depth at
22 m, with the lowest depth at 60 m.
River flowrate mixed with flood is peaked at 3,400 m3/s, with river with tide reverse
flow peaked with tide at 2,300 m3/s. River flowrate during wet season is around 350 –
400 m3/s and during dry season is around 200 m
3/s. The minimum recorded flowrate
is 40 – 50 m3/s. The highest river speed could reach 1.5 m/s. Thi Vai River based on
Dong nai Province planned landuse, is for aquaculture farming.
Tides: rise at 4-9 am, and 4-11 pm. The tide falls from 9am-4 pm and 11pm-4am. Thi
Vai River is heavily affected by tide, and shows sign of being heavily polluted. The
project location is 24 m above Thi vai River level, hence won’t be affected by tide
2.1.2. Socio-economic Conditions
2.1.2.1. Existing Socio-economic Conditions
According to the report on socio-economic development and public security and
defense, year 2011 of Long tho commune, the socio-economic conditions are
summarized as follows:
(1). Agriculture
Total cultivation land area was 270 ha, including:
+ Rice land: 95/90 ha, equally to 1065 of the planned target. The yield is 3.5 tons to
4.5 tons per ha. Various anti-pesticide rice species were introduced, including
OM4900, OM6162, MTL 110, and Bac Thom…
+ Vegetable land: 155/150 ha, equally to 103% of the planned target due to expansion
of vegetable land along Cau Mit canal. The productivity is 30 tons to 40 tons,
generating stable income of 25 to 35 million VND per ha, minus the investment cost.
+ Cassava: reduces to 20 ha comparing to 30 ha planned, equally to 67%, mainly on
the planned land of committed projects.
Agricultural promotion: VNd 80 million was invested to develop 2,000 m2
vegetable land but the efficiency is not high due to lack of in-glass door vegetable
nurturing experience. The Economy Department is introducing a new model. 7
excellent farmers are trained on vegetable cultivation at the provincial agricultural
promotion center. Training course was hold at cooperative teams, attracting 30
trainees.
Husbandry: The livestock herd is reducing due to narrowing glass land. There were
480 cow heads, reducing 50 heads comparing to that of 2010. The buffalo drove had
50 heads while the pig flock has 1,570 heads. The chicken and duck herd has 1,500
heads at household-scale.
Aquaculture: 45 ha intensive shrimp rearing land was closed due to epidemic
disease of 45-year young shrimp.
(2). Trade and Service
44
So far, the commune has 296 business households in food processing, trading, food
supply, accommodation services, internet service, increasing 24 households comparing
to that of previous year. 161 households registered to tax department, increasing 71
households comparing to that of previous year. The accommodation leasing household
number increases 22 households, increasing to 104 households with 1,346 rooms.
Businesses households at Long tho market were registered but the business is not
stable. 161 households registered at the tax office, increasing 71 households
comparing to that of previous year. 89 households were classified as low-income ones.
(3). Education and Training
School Year 2011 – 2012: 63 kindergarteners; and 412 preschoolers.
Total student number is 556 students comparing to the target of 520 students,
increasing 7%. Teaching methodology and vocational training are strengthened. The
educational environment is improved to raise the teaching quality.
2.1.2.2. Economic Development Plan of the Wastewater Receiving Zone
Nhon Trach District Socio-economic Development Plan in 2006-2020 sets the socio-
economic and environment development targets as follows:
2006-2010 Period: the average economic growth rate target is 16.4% per year, of
which, the growth rate of industry, agriculture and service sectors are 17-17.5%, 4%
and 24-25%, respectively. Those of 2011-2015 period are 15.5%, 15-15.5%, 3%, and
20-21%. 2016-2020 period targets are 14.5%, 13-13.5%, 1.5% and 18-19%,
respectively.
Natural population growth rate shall be controlled at less than 1.1% by 2010 and
shall be maintained in the period up to 2020.
Poverty household rate shall be reduced to fewer than 2% by 2010 and basically
cleared in 2011-2015 period.
High secondary school universalize shall be completed in 2010.
Increase vocational training labor ratio to 30%, 60% and 80% by 2010, 2015 and
2020, respectively.
Urban unemployment ratio shall be controlled at fewer than 3% in the period to
2020.
Under-5-year old malnutrition ratio shall be reduced to 13%, 8% and 3% by 2010,
2015 and 2020, respectively.
Power supply coverage shall be increased to 95% by 2010 and 100% in 2011-2015
period. .
Clean water accessing ratio shall grow up to 95% in 2010 and 100% in 2011-2015
period.
Forest and greenery tree coverage shall be expanded to 25%, 29% and 32% in 2010,
2015 and 2020 respectively.
45
Collected non-hazardous industrial solid waste, and urban waste shall be 75% by
2010 and 100% in 2011-2015 period. Over 85% hazardous waste shall be collected
and treated properly by 2010 and expanded to 100% in 2011-2015 period.
Water environment pollution prevention: the centralized wastewater treatment
system shall be developed at 100%W industrial parks by 2010; 70% urban wastewater
is collected to the centralized treatment system in 2010-2015 period and this number
will increase to 100% in 2016-2020.
Decision No. 284/2006/QD-TTg dated December 21, 2006 of the Prime Minister
approved the adjustment of Nhon Trach new town construction plan to 2020 sets Nhon
Trach district development orientations as follows:
To be one of industrial, trade-service, tourism, education and training and science
and technology centers of Dong Nai province as well as Southern Focal Economic
Zone, meeting urban category II standard;
To be a key transport hub of the southern focal economic zone;
Play a significant role in public security and defense of the southern focal economic
zone .
Population:
Forecast by 2010: 265,000 people, of which, urban population is 150,000 people;
Forecast by 2020: 600,000 people, of which, urban population is 450,000 people.
Construction Land Availability
By 2010: the urban construction land will cover 10,000 ha, of which, the civil land
will be 4,200 ha or 160 m2/capita;
By 2020: the urban construction land will be expanded to 22,700 ha, of which, the
civil land will be 9,200 ha or 155 m2/capita.
* Urban Spatial and Architecture Development Directions:
Urban Development Direction: the urban development is promoted in the zone
surrounded by Road 25° and District 19, Dong Nai and Long Tau riverside zones
connecting to District 2 and District 9 of Ho Chi Minh City, specifically as follows:
Existing District Urban Center: develop compact urban centers, urban center, trade
and service centers;
Northwest side along Dong Nai River: develop urban and tourism center, university
center;
Southwest side: develop urban centers, rural residential centers, port and port-
integrated industries along Long Tau River;
Eastern side: develop industrial parks and rural residential centers;
Southern and southeast side along Dong Tranh River, Thi Vai River adjoining to
Can Gio district (Ho Chi Minh City) and Phu My new town (Ba Ria – Vung Tau): the
submerged forest preserve zone.
46
Technical Infrastructure Development Orientations:
a) Transport
Primary Indicators:
+ Transport land: 2,430 ha, including 1,030 ha urban transport land.
+ Urban transport land ratio: 11.2%, of which, traffic facilities land shares 1.7%.
+ Primary urban road density: 2.5 - 3 km/km2;
+ Urban transport land per capita: 22.8 m2/capita.
b) Sewage and Environmental Sanitation:
Indicators: the domestic wastewater volume is equally to 80% of supplied water; the
industrial wastewater is 40 m3/ha;
Domestic wastewater:
+ Total domestic wastewater volume will grow up to 80,000 m3/day by 2020;
+ Total industrial wastewater volume will be 144,000 m3/day;
+ Central center: to collect wastewater to a treatment facility at Phuoc An commune
with capacity of 65,000 m3/day; the treated wastewater is discharged to Bau Bong
stream, flowing to Ba Hao River.
+ Long Tho commune, Dong Mua Rua zone: the wastewater is transferred to a
pumping station with capacity of 5,000 m3/day near the ring road to pump the water to
the treatment facility Number 1;
+ Long Tan and Phu Hoi communes: the wastewater is collected to the second
wastewater treatment facility at Dong Nai River spanning bridge foundation with
capacity of 5,000 m3/day;
+ Hiep Phuoc commune: the wastewater is collected to the third treatment facility at
northern urban residential center with capacity of 5,000 m3/day; the treated
wastewater is discharged to Ba Ky canal;
+ Dai Phuoc commune and a part of Vinh thanh commune adjoining to Ong Keo
canal: the wastewater is collected to the fourth treatment facility near Cau Trai River
with capacity of 4,000 m3/day;
+ Other basins besides Ong Keo canal in Phu Huu commune and Phuoc Khanh
commune, and the zone outside Dong Mon River in Phuoc Thien commune: local
treatment.
Industrial wastewater:
+ Industrial wastewater of plants and industries inner the urban area shall be processed
meeting the limit B prior discharge to the urban sewage system. The centralized
treatment system shall be developed at industrial parks. The wastewater shall be
treated at the discharge source prior transferring to the centralized treatment system.
The wastewater shall be treated at the centralized system meeting limit A to discharge
into the environment;
47
+ Hospital waste shall be treated and pasteurized to discharge into the urban sewage
system.
Urban Sanitation:
+ Domestic Solid Waste: A domestic solid waste disposal site, covering 10 ha shall be
developed in short-term at Dong Mu Rua zone, Phuoc An commune, outside inner ring
road. A provincial landfill is planned at Bau can commune, Long Thanh district,
covering 100 ha. Hazardous solid waste shall be collected to Giang Dien landfill.
+ Cemetery: In the short term, a cemetery in Long Tho commune, covering 20 ha
could meet the current cemetery requirement. In the future, the cemetery shall be
developed far from the urban center 20 - 30 km;
Environment and Water Landscape Preservation:
To control the domestic and industrial wastewater strictly
To grow tree and protect greenery buffer zones along the river and canals, forming
open space for new towns
To control ecotourism development along rivers and on islands.
Initial Construction Development Plan and Prioritized Projects:
To develop technical infrastructure of Nhon Trach industrial park which is 2,700 ha
area
To develop urban housing and public utilities
To develop specific centers: education, sport, healthcare and trading centers
To develop tourism centers, parks, especially along Dong Nai, Dong Mon, Nha Be
and Cai Rivers.
2.2. CHARACTERISTICS OF RECEIVING WATERS
2.2.1. Discharge location
Wastewater after being treated is directed through Lo Ren canal, and then continues
flowing into Ma Reng canal and its sub-canals, before being discharged into the
upstream section of Thi Vai River (the section along Long Tho commune, Nhon
Trach, Dong Nai)
The discharge point of Lo Ren Canal (near Lo Ren Bridge) is coordinated At (VN2000
coordinate system):
+ X: 1.184.745 m.
+ Y: 413.438 m.
The location of receiving waters with nearby area is shown in appendix.
LOCATION OF RECEIVING WATERS
48
Open ditch, to collect stormwater Open ditch for treated wastewater from treatment
plant andstorm water
The connection point between the above
open ditch and closed culvets
Lò Rèn discharge point before being discharged
into the environment
Lo Ren Canal – section under Lo Ren Bridge Mareng Canal – taken from the middle of canal
THI VAI RIVER
49
Thi Vai River – the intersection with other
streams within the border of Long Tho
Commune
Thi Vai River – section running through Long
Tho Commune
Figure 8: Pictures of the site
2.2.2. Local Environment Status
2.2.3. Description Of All Discharge Sources With Same Final Discharge Receiving
Body
The discharge sources are listed below in order of their location along the discharge
network: upper Lo Ren Canal, lower Lo Ren Canal (downstream of project discharge
point), and then the section along Thi Vai River (near Long Tho Commune).
Table 10: List of all wastewater discharge sources in vicinity of Nhon Trach 3 IP
No Wastewater Source Discharge rate
(m3/day)
Discharge point Receive body
I Industrial sources 20,500
1 Formosa Limited
Liability Company 5,000 Lo Ren
Mareng and
Lo Ren
Canals
2 Nhon Trach 2 IP 12,000 Upstream of Rach
Mieu
Rach Mieu
3 Nhon Trach 1 IP 3,500
Upper stream of
Thi Vai before
joined by Ma
Reng Canal, and
100m downstream
of discharge point
Thi vai River
(upper stream
along Long
Tho
Commune)
II Agricultural sources
7,043,760 –
9,391,680
m3/farming
season
50
No Wastewater Source Discharge rate
(m3/day)
Discharge point Receive body
1
Wastewater from
shrimp farming in Long
Thanh and Nhon Trach
District
9,000 – 12,000
m3/ha
Thi vai River
Thi vai River
III Domestic 1,467 – 1,956
1
Domestic wastewater
from Long tho
Commune, Nhon Trach
District
536 – 715 Lo Ren
Mareng and
Lo Ren
Canals
2
Domestic wastewater
from Hiep Phuoc
District, after mixing
with surface water of
Rach Mieu, Ba Ky and
Ma Reng Canals
930 – 1,240
Upper stream of
Thi Vai before
joined by Ma
Reng Canal, and
100m downstream
of discharge point.
Thi vai River
(upper stream
along Long
Tho
Commune)
2.2.3.1. Industrial Sources
Wastewater after treatment of Nhon Trach 3 IP is directed into Lo Ren Canal, then
mixed with wastewater from Formosa section of Industrial Park and the Long Tho
Commune (Hiep Phuoc). This continues to flow southeast down the slope across
terrain, receiving wastewater from residential areas along the canal, before running
through Ma Reng Canals and finally being discharged into upper Thi Vai.
2.2.3.2. Agricultural Sources
In addition to industrial wastewater, the regional agricultural activities also contribute
significant amounts of discharges into the Thi Vai River. Currently the main
agriculture activities here are quite diverse: fishing, animal livestock, horticulture….
But the majority of wastewater is still generated by aquaculture activities (farming
black tiger shrimp, white shrimp, and other types of fishes). The farming areas are
distributed across Long Phuoc, Phuoc Thai Communes (Long Thanh - Dong Nai),
Long Tho and Phuoc An Communes (Nhon Trach - Dong Nai) and My Xuan
commune, Phu My town (Tan Thanh, Ba Ria - Vung Tau). This type of wastewater
from shrimp farming arises mainly after the shrimps were harvested. As the farmers
live on both sides of river banks often works in small scale/ household business (about
1-2 ha in farming area), they simply can’t afford an appropriate treatment system for
these wastewater. The wastewater from shrimp farming, include ponds water with
food scraps, wastes, and used biotic; is currently being discharged directly into the Thi
Vai River without treatment.
According to survey data of Le Van Thu - Project "Investigation and proposing
solutions for the development and protection of mangrove ecosystems in Long Thanh -
Nhon Trach" in 2005; the mangroves areas in two districts of Long Thanh and Nhon
51
Trach, have a total area of shrimp farming is 782.64 ha. This generate an amount of
wastewater approximate 9000-12000 m3/ha. In another words, the total volume of
wastewater from aquaculture activities discharged into Thi Vai river is estimated at
7,043,760 to 9,391,680 m3/farming season (or 58,698 to 93,917 m
3/day due to a 100-
120 days/farming season). However, most of these wastewater is discharged only after
being harvested (after around 3-4 months) so there is always a concentrated amount of
discharge by the end of this period rather than distributed evenly into daily.
2.2.3.3. Domestic Uses Sources
In addition to the industrial and agricultural wastewater, the wastewater from nearby
residential areas also should be mentioned. The demographic of those residential areas:
Long Phuoc and Phuoc Thai Communes (Long Thanh - Dong Nai Districts ), Hiep
Phuoc, Long Tho and Phuoc An Communes (Nhon Trach -Dong Nai Districts), in
addition to Xuan My Commune and Phu My town (Tan Thanh district, Ba Ria-Vung
Tau District) are as follows.
Table 11: The demographic of nearby residential areas to Thi Vai river
No Residential Area Population
1 Long Thanh District – Dong Nai
Province
Long Phuoc
Commune 10,402
2 Phuoc Thai
Commune 13,105
3
Nhon Trach District – Dong Nai
Province
Hiep Phuoc
Commune 10,338
4 Long Tho
Commune 5,959
5 Phuoc An
Commune 6,547
6 Tan Thanh District, Ba Ria-
Vung Tau province
My Xuan Commune 12,383
7 Phu My Town 8,797
Total 67,531
Standard wastewater discharge per capital of households with sewer system, but
without bathroom is ranged from 90-120 liters/capital/day (Nguyen Trung Viet, 2005).
If apply that to the residents along Thi Vai River with a population of 67,531 residents,
the daily discharged wastewater can be estimated at 6078-8104 m3.
However, at present, these residential areas still either does not connect to public
sewer systems, or connect to an incomplete system. This means the majority of these
52
domestic wastewaters are still left to run-off and eventually infiltrate into the grounds.
That’s why the amount of discharged wastewater directly into Thi Vai River from this
source can be considered negligible.
2.2.4. Nearby Water Supply Intake (within 3 km downstream)
The water quality of nearby open water source is much lower than the requirement for
water supply source (mostly due to salinity) . Therefore the main use of them is for
river transportation and aquaculture.
Along the Mareng and Lo ren, there is no water supply intake structure. Only the
residents lives near the meet between Mareng and Thi vai working in fishing, and no
river water was used for farming .
3km downstream of Thi Vai (from Mareng discharge point), there’s also no river water
intake sites, even for industrial or aquaculture purposes.
2.3. CURRENT ENVIRONMENT STATUS
The environmental statistics of Nhon Trach 3 IP for Phase 2 was monitored by Tin
Nghia Company every 6 months. The results of 12/2011 can be summarized as below.
2.3.1. Atmosphere Status
2.3.1.1. Location of samples
Table 12: Location of atmosphere quality testing is as below
No Samples Location
1 K1 In front of DerFul Co Limited
2 K2 In front of Sinpoong Vina Company
3 K3 Near Velco Company
4 K4 Near Viet Long Company
5 K5 Near Bueno Co Limited
6 K6 Near Kirby SEA company
7 K7 Near CSB battery Vietnam Company
2.3.1.2. Sampling and analyzing methods
Table 13: Sampling and analyzing methods
No Parameters Sampling methods
1 Noise TCVN 5964 : 1999
2 NO2 TCVN 6137 : 2009
3 SO2 TCVN 5971 : 1995
4 CO 52 TCN 352 - 89
5 Suspended dusts (*) TCVN 5067 : 1995
6 THC TCVN 7558-1:2005
53
7 Formaldehyde General method
Note:(*): parameter accepted by Vilas
2.3.1.3. Results
Table 14: Results of Nhon Trach 3 – Phase 2 air quality
Samples
Noise
s Dusts NOx SO2 CO HC HCHO
dBA mg/m3
K1 58.5 152.6 17.4 13.2 2461 UD UD
K2 59.1 110.0 18.4 12.6 2280 UD UD
K3 58.3 120.4 20.8 16.0 2931 UD 0.96
K4 59.5 120.5 18.4 16.8 1628 UD UD
K5 63.1 146.4 12.8 12.2 1791 UD UD
K6 59.1 112.0 20.2 16.5 2605 UD UD
K7 54.7 155.2 21.1 18.7 2280 UD 1,3
QCVN
05:2009/BTNM
T
70
(*) 300 200 350 30,000
5,000
(**)
20
(**)
Source: Environment Technology and management Centre, 11/2011.
Notes
UD: undetected
QCVN 05:2009/BTNMT: Air quality, surrounding air quality
(*) QCVN 26:2010/BTNMT: National regulation on noises
(**) QCVN 06:2009/BTNMT: National regulation on hazardous air emission in
surrounding air
Comments
The analysed results showed all parameters met QCVN 05:2009/BTNMT, QCVN
26:2010/BTNMT, and QCVN 06:2009/BTNMT
2.3.2. Water Quality Status
Results of the sampling of water supply sources can be presented in table below:
Table 15: Tap Water quality
No Parameters Units Sampling Methods Results QCVN
01:2009/BYT
1 pH - TCVN 6492:1999 7.24 6.5 – 8.5
2 Colour Pt Photometry 0.00 ≤15.0
54
No Parameters Units Sampling Methods Results QCVN
01:2009/BYT
3 Odour - Smelling
No
offensive
smell
No offensive
smell
4 Turbidity NTU Photometry 0.07 ≤2.0
5 Hardness mg/l SMEWW – 2340 C 58.0 ≤300
6 Chloride (Cl-) mg/l SMWW4500 – Cl
- B 2.50 ≤250
7 Permanganate mg/l TCVN 1686 : 1996 Can’t be
Detected ≤2.0
8 Sulfate mg/l US – EPA 1997 –
375,4
12.47 ≤250
9 Iron mg/l SMEWW 3500Fe B 0.02 ≤0.3
10 Manganese mg/l AAS 0.02 ≤0.3
11 Nitrite (NO2-) mg/l TCVN 1678:1996 0.009 ≤3.0
12 Nitrate (NO3-) mg/l TCVN 1680:1996 2.03 ≤50
13 Chloride residue mg/l RC Mater 0.33 0.3 -0.5
14 Total Coliforms /100ml CFU ISO 9308 – 2: 2000
(E)
0/100ml 0
15 E. coli/100ml CFU ISO 9308 – 2: 2000
(E)
0/100ml 0
16 As (*) mg/l TCVN 4571 - 1988
Can’t be
Detected
(<35x10-4
) 0.01
17 Cd (*) mg/l TCVN 6197 - 1996
Can’t be
Detected
(<35x10-4
) 0.003
18 Pb (*) mg/l TCVN 4573 - 1988
Can’t be
Detected
(<35x10-4
) 0.01
19 Hg (*) mg/l TCVN 5991 - 1988
Can’t be
Detected
(<35x10-4
) 0.001
20 Ammonia (*) mg/l SMEWW 4500–Norg
B
KPH
(<35x10-4
) 3
(Source: Dong Nai Department of Health, 08/2011)
Note
(*) From Center of environmental and labour health in 11/2011.
QCVN 01:2009/BYT – National regulation on portable water
55
Comments
The results showed that water supply sources in Nhon Trach 3 IP met all of the
required regulation in QCVN 01:2009/BYT.
2.3.2.1. Surface Water Quality
(1). Sampling locations
Table 16: Locations of Surface water Sample
No Sample Location
1 NM1 Mareng Canal
2 NM2
On Thi Vai River, 500m upstream from the join with Mareng
canal during high tide
3 NM3
On Thi Vai River, 500m upstream from the join with Mareng
canal during low tide
4 NM4 On Thi Vai River, 500m downstream from the join with Mareng
canal during high tide
5 NM5 On Thi Vai River, 500m downstream from the join with Mareng
canal during low tide
- The sample is taken 20 cm below the surface specialized scoops
(2). Sampling and analyzing method
The sampling method for surface water in Ma Reng Canal, Thi Vai River is presented
in thetable below:
Table 17: The sampling method for surface water
No Parameters Methods
1 pH TCVN 6492: 1999
2 DO Hanna 9142 Equipment
3 BOD5 SMEWW 5210 B
4 COD SMEWW 5220 C
5 TSS SMEWW 2540 D
6 As ASTM D 2972-08
7 Hg ASTM D 3223-02
8 Pb Hach - 8033
9 Cd Hach - 8017
10 TN TCVN 6638:2000
11 TP Hach – 8190
12 Oil and Greases SMEWW 5520 B
56
Table 18: Surface water quality
No Parameter
s Units NM1 NM2 NM3 NM4 NM5
QCVN 08:2008,
Column B1
1 pH - 6.8 6.7 6.8 6.8 6.8 5.5 - 9
2 DO (*) mg /l 4.1 6.1 6 5.8 5.6 >4
3 BOD5 mg /l 6 3 4 3 4 15
4 COD mg /l 35 25 28 28 32 30
5 TSS mg /l 30 22 25 26 27 50
6 As (**) mg /l 0.044 0.115 0.052 0.028 0.032 0.05
7 Hg (**) mg /l Undetected
(LOD=0.0003)
Undetected
(LOD=0.0003)
Undetected
(LOD=0.0003)
Undetected
(LOD=0.0003)
Undetected
(LOD=0.0003) 0.001
8 Pb mg /l Undetected
(LOD=0.01)
Undetected
(LOD=0.01)
Undetected
(LOD=0.01)
Undetected
(LOD=0.01)
Undetected
(LOD=0.01) 0.05
9 Cd mg /l Undetected
(LOD=0.005)
Undetected
(LOD=0.005)
Undetected
(LOD=0.005)
Undetected
(LOD=0.005)
Undetected
(LOD=0.005) 0.01
10 TN (*) mg /l Undetected Undetected Undetected Undetected Undetected 0.5
11 TP mg /l 0.2 0.16 0.2 0.1 0.13 0.3
12 Oil and
Greases (*) mg /l Undetected Undetected Undetected Undetected Undetected 0.1
(*) : Parameters not yet certified by Vilas.
(**): by ENTEC;
LOD: limit of Detection
57
Note
Samples from Sonadezi Company collect and analyse in 5/2012
QCVN 08:2008/BTNMT – National regulation on surface water, column B1:
Use for irrigation and industrial uses.
Comments Compare the sampling results against QCVN 08:2008/BTNMT, Column B1 showed:
COD of 2 samples NM1, NM5 over the regulation from 1.17 times;
TSS, BOD5 and other parameters of all 5 samples meet the regulation
2.3.2.2. Groundwater quality
Currently there’s no groundwater intake structure within Nhon Trach 3 IP, so the up to
date statistics will be updated in the next EIA report. Below is the underground water
quality as measured in April 2006.
Table 19: Groundwater quality of Nhon Trach 3 IP (Sampling date: 17/04/2006).
Parameters Units N1 N2 N3 N4 QCVN
09:2008
pH - 4.93 5.70 5.1 4.86 5.5–8.5
TDS mg/l 36 29 37 29 1,500
Hardness mg/l 20.8 18.2 21.2 19.3 500
Chloride mg/l 28.2 26.8 27.4 25.8 250
Fluoride mg/l UD UD UD UD 1.0
N-NO3- mg/l 4.2 3.8 3.9 4.1 15
Total Fe mg/l 0.04 0,04 0.05 0.04 5
Mn mg/l UD UD UD UD 0.5
Sulfate mg/l 2.84 2.65 2.55 2.78 400
Lead mg/l UD UD UD UD 0.01
Hg mg/l UD UD UD UD 0.001
Zinc mg/l UD UD UD UD 3,0
Oils and greases mg/l UD UD UD UD -
Pesticide chemicals mg/l UD UD UD UD -
E.Coli MPN/100ml 3 2 3 2 UD
Coliform MPN/100ml 12 10 12 10 3
Source: Nhon Trach 3 – Module 2 ‘s EIA report 2006
Notes :
QCVN 09:2008/BTNMT: National regulations about underground water quality;
UD : Undetected
" – ": Not regulated
58
Sampling locations:
N1: Samples from Mr. Tong’s farm.
N2: Samples from Nhon Trach water supply plant.
N3: Samples from wells of Lo Ren residential area.
N4: Samples from well in 319B road.
Comments:. Comparing the results with QCVN 09:2008/BTNMT showed that the
groundwater quality onsite have high E. Coli and Coliform (2-4 times higher than
regulation) while all of the well samples have lower pH than the regulation (due to
alum or salinity). Since local residents are extracting groundwater, the IZ will be
periodically measuring groundwater at nearby sites.
2.3.3. Soil Status
The soil status within the project site can be presented in table below
Table 20: Soil quality in Nhon Trach 3 IP – Phase 2
No Parameters Unit Results QCVN
03:2008/BTNMT D1 D2 D3 D4
1 As mg/Kg 2.27 3.98 3.19 5.37 12
2 Cd mg/Kg UD
(<0.2) 1.23 0.87
UD
(<0.2) 10
3 Cu mg/Kg 8.15 8.59 7.74 5.12 100
4 Pb mg/Kg 21.72 20.22 24.71 23.71 300
5 Zn mg/Kg 25.71 30.95 23.96 34.7 300
Source: Tin Nghia
Note:
D1: 100 m from head of project site;
D2: Next to the surrounding walls of Y.S.P Company;
D3: End of the project site, 100 m away from road 8;
D4: Project site toward N2 Road.
UD: undetected
Based on the results comparing to the national regulations on heavy metals in soils,
we can see that the soils here are not polluted
2.3.4. Surrounding Deposit Status
59
2.3.4.1. Sludge quality from treatment plant
Sludge sample from B10 tank of the CETP was analysed by Hai Dang Company in
1/2011. He results are presented as below:
Table 21: Results of the sludge sampling
No Parameters Units Sampling method Results QCVN
07:2009/BTNMT
1 pH - TCVN 5979 – 2007 6.50 -
2 As mg/kg TK TCVN 6496 – 2009 4.12 2.0
3 Cd mg/kg TCVN 6496 – 2009 0.40 0.5
4 Ni mg/kg TCVN 6496 – 2009 0.25 70
5 Pb mg/kg TCVN 6496 – 2009 2139.9 15
6 Hg mg/kg TK TCVN 6496 – 2009 0.61 0.2
7 Cr mg/kg TCVN 6496 – 2009 101.59 5.0
8 Zn mg/kg TCVN 6496 – 2009 522.04 250
9 CN- mg/kg TK TCVN 6181 – 1996 <0.05 -
10 Phenol µg/kg KTSK 21 – GC/MS 1.71 1,000
Sources: Sludge sample from Hai Dang Company, under no 11010211/KQ in 7th Jan
2011
Notes :
QCVN 07:2009/BTNMT: national regulation on hazardous wastes
Comments:
The analysed results against Regulation QCVN 07:2009/BTNMT showed heavy metal
parameters such as As, Pb, Cr and Zn are all over the regulation. This mean, the
sludge from Nhon Trach IP treatment plant will be classified as hazardous waste.
2.3.4.2. Thi Vai River bed sediments
The sampling results of the sediments/ sludge from Thi Vai riverbed can be presented
in below table:
Table 22: The sampling results of the sediments underneath Thi Vai river
No Parameters Units Methods Results QCVN
03:2008/BTNMT
1 Asen (As) ppm MOSA 23- 3 As 18.7 12
2 Cadmium (Cd) ppm TCVN 6496 - 2009 1.64 2
3 Mercury (Hg) ppm MOSA 23- 3 Hg 0.02 -
4 Lead (Pb) ppm TCVN 6496 - 2009 12.73 70
5 Total oil and ppm TCVN 7369 - 2004 105 -
60
No Parameters Units Methods Results QCVN
03:2008/BTNMT
1 Asen (As) ppm MOSA 23- 3 As 18.7 12
2 Cadmium (Cd) ppm TCVN 6496 - 2009 1.64 2
3 Mercury (Hg) ppm MOSA 23- 3 Hg 0.02 -
greases
Note
Samples from Environmental Technology Advising & Labour Health and Safety
Center 11/2011.
QCVN 03:2008/BTNMT – National regulation on heavy metal in soils
“-”: Not regulated
Comments
Due to the lack of national regulation on river sediments, the project used QCVN
03:2008/BTNMT – national regulation on heavy metal in soils instead. The results
showed mostly meet the standard, except the level of As is 1.6 times higher than the
required standard.
2.3.5. Ecological Environment
2.3.5.1. Flora
(1). Long Thanh – Nhon Trach Mangrove Forest
Long Thanh – Nhon Trach mangrove forest is distributed along two banks of Thi Vai
River where there are lots of habitat of typical floral species of the mangrove forest,
playing significant role in maintaining eco-balance in the area. There are total 261
floral species of 61 families and 184 branches. They belong to Magnolyophyta,
Magnolyopsida and Liliopsida.
Long Thanh – Nhon Trach mangrove forest is in the submerged land of the province,
contributing to stabilize deposited alluvium, forming a protective wall, preventing
river mouth erosion which is caused by tidal and other activities. The mangrove forest
plays significant roles in maintaining the eco-balance, including alluvium transporting
and movement of plankton, balancing fish and shrimp larva resources. The mangrove
forest is managed by Long Thanh Farm, covering the area of 4 communes: Phuoc An,
Long Tho (Nhon Trach district) and Phuoc Thai, Long Phuoc (Long Thanh district).
The inland waterway transport system is densely in the forest area, favorable to
transport and ecotourism development. It is estimated that the total natural area of
Long Thanh – Nhon Trach mangrove forest is 7,952.67ha, comprising:
7,060 ha in Nhon Trach district (4,036 ha with forest trees and 3,024 ha without
forest trees).
61
1,467 ha in Long Thanh district.
(a). Plant Plankton
The salinity-polluted zone is affected by industrial wastes. Number of species in this
zone is less diversified, comprising 29 species where Bacillariophyta is dominated
with 17 species or 58.6% of 10 families; following by Chlorophyta with 6 species or
20.7%, belonging to 6 families; Cyanophyta with 4 species (13.8%) of 4 families;
Chrysophyta with one species (3.4%); and Euglenophycota with 1 species (3.4%). The
average density is 19,000 to 45,000 individuals per 1 litter.
(b). Zoo Plankton and Zoo Benthos
In the salinity polluted zones which are affected by industrial wastes, Copepoda
species are dominated with 11 species, 20 initials per liter; following by Rotifer – 2
species, 8 individuals per liter, Protozoa – 5 species, 7 individuals per liter, Cladocera
– 11 species – 3 individuals per liter and larva – 38 individuals per liter.
(c). Crustacean
19 valuable shrimp species are identified, especially Penaeus indicus, Metapenaeus
ensis; Metapenaeus lyssianassa Metapenaeus spinulatus is an important species in
intensive rearing ponds in Long thanh and Nhon Trach. Scylla serrata crab is also
exploited in mangrove forest. Regarding Penaeud monodon, the rearing has been
developed rapidly.
(d). Mollusk
There are some mollusk species in Thi Vai River which are exploited to nurture duck
and fish. They shall be further studied to maintain these valuable natural resources.
(2). Terrestrial Ecosystem
The local terrestrial ecosystem is characterized as follows:
(a). Species
Characteristics of species in Thi Vai River are shown in Table 20.
(b). Species Coverage
139 species have small coverage, sharing 53%, distributed in incident-occurred
zones or used to be densely community.
86 species have average coverage, sharing 33% which are mixed groups in the
community, having characteristics of dominated species.
62
37 species have high coverage, sharing 14%, which are dominated species in
riverside forest, of which, Rhizophora apiculata is dominated.
(c). Value
13 salt-water species distributed along canals, river banks in tidal inundation
zones. Salt water species trees are planted or wild trees in fertilizer land along the
river;
123 valuable tree species: green coverage, erosion-prevention, organic fertilizer,
etc.
86 species used as medical herbs; 6 vegetable species
34 species as bonsai tree
62 wooden tree species
44 fruit tree species.
2.3.5.2. Aquatic Ecosystem (Zoo and Plant Plankton, Zoo Benthos)
(1). Zoo Plankton
The survey results of past years show that there are replacement of various species
such as substitution of Cartia clausi, Paracalanus parvus and shrimp larva by Oithona
plumifera and nauplius.
(2). Plant Plankton
The survey results show there are structure variations of individuals by dominant
species. When the plants were not developed in Nhon Trach III IP, algae species are
dominated, including Chaetoceros, Pseudocurvicetus, C. Spinosus, Skeletonema
costatum, Ditylum sol and Coscinodiscus jonessiacus. When the plants are operating,
silica algae species are dominated, including Chaetoceros abnormis, Nitzchia
longissima, and especially Lepto-cylindiscus danicus.
(3). Zoo Benthos
The river bed covers with gravel and stiff clay. Main zoo benthos species are
Anthozoa, Spongia, Holothurian. There are Sedentaria or Terebellidesstroemi Sars,
Sabllearia cenentarium Moore, Sternaspis sactata (Rosami) along the river bank.
63
EVALUATION OF ALTERNATIVES
3.1. CRITERIA FOR SELECTING ALTERNATIVES
Any of the alternative solutions still have to meet the national regulation QCVN
40:2011/BTNMT.
The discharge point have to ensure the discharge need, while avoid the negative
impacts toward the environments and the local public.
Sludge from the treatment system has to be treated as hazardous wastes, and avoid
impacts toward the environment.
3.2. LOCATIONS OF OUTLETS
The purpose of the choosing the exist location of outlet is 1) To utilize the exist
infrastructure of Nhon Trach 3 IP; 2) To save the construction cost; 3) The exits
location of outlet is suitable with the real condition. Wastewater from Nhon Trach 3
IP – Module 2 will use the existing (Module 1) discharge network. Therefore, the
location of Module 2 discharge 2 will be unchanged.
3.3. WASTEWATER TREATMENT TECHNOLOGY
Treatment efficiency of the treatment plant (Module 1) is very effective. The results
from earlier treatment can be seen in Table 26 and 27 as below, while the up-to-date
results 05/ 2012) were already presented in table below:
Table 23: The characteristics of the IP centralized wastewater treatment (Phase 2 -
Module 1), September 2011
No Parameters Unit
WASTE WATER
characteristics 9/2011
QCVN
40:2011/BTNMT
Column B with
Kq=1.1;Kf=1.0
Pre-treatment
(Equaliser)
After
Treatment
1 pH - 6.2 7.2 5.5 - 9.0
2 COD mg O2/L 760 Undetected
(LOD=10) 165
3 BOD5 mg O2/L 330 9 55
4 TSS mg/L 148 48 110
5 Colour Pt-Co 42 13 165
6 N-NH4+ mg/L 25.8
Undetected
(LOD=0.056) 11
7 TN mg/L 27.3 4.8 44
8 TP mg/L 9.4 1.72 6.6
9 CN- mg/L 0.013 Undetected 0.11
64
No Parameters Unit
WASTE WATER
characteristics 9/2011
QCVN
40:2011/BTNMT
Column B with
Kq=1.1;Kf=1.0
Pre-treatment
(Equaliser)
After
Treatment
(LOD=0.005)
10 Cr6+
mg/L Undetected
(LOD=0.01)
Undetected
(LOD=0.01) 0.11
11 Cr3+
mg/L Undetected
(LOD=0.025)
Undetected
(LOD=0.025) 1.1
12 Fe mg/L 1.37 Undetected
(LOD=0.06) 5.5
13 Zn mg/L 0.19 0.21 3.3
14 Cu mg/L Undetected
(LOD=0.1) 0.18 2.2
15 As mg/L Undetected
(LOD=0.001)
Undetected
(LOD=0.1) 2.2
16 Hg mg/L Undetected
(LOD=0.001) 0.003 0.011
17 Pb mg/L 0.036 Undetected
(LOD=0.001) 0.55
18 Cd mg/L Undetected
(LOD=0.005)
Undetected
(LOD=0.01) 0.11
19 Ni mg/L Undetected
(LOD=0.06)
Undetected
(LOD=0.005) 0.55
20 Inorganic oils mg/L 12.6 Undetected
(LOD=3) 11
21 Organic Oils mg/L 7.26 Undetected -
22 S2-
mg/L 2.83 Undetected 0.55
23 Cl2 mg/L Undetected
(LOD=0.1) 1.85 2.2
24
Phosphorus
based
Pesticides
µg/L 0.0073 Undetected
(LOD=0.001) 1.1
25
Chloride
based
Pesticides
µg/L Undetected
(LDO=0.0005)
Undetected
(LOD=0.0005) 0.11
26 Phenol µg/L 0.08 Undetected
(LOD=0.01) 0.55
27 Coliforms MPN/
100mL 3.5x10
6 < 1.8 5500
Source: Environmental monitoring report of Nhon Trach 3 IP, Phase 2, 2011
Table 24: The characteristics of the IP centralized wastewater treatment (Phase 2 -
Module 1), fourth quarter, November 2011
65
No Parameters Unit
WASTE WATER
characteristics 9/2011
QCVN
40:2011/BTNMT
Column B with
Kq=1.1;Kf=1.0
Pre-treatment After
Treatment
1 pH - 6.69 8,47 5.5 - 9.0
2 COD Pt-Co 278 13 165
3 BOD5 mg/L 192 18 55
4 TSS Mg/L 104 39 110
5 Colour mg/L 55 25 165
6 N-NH4
+ mg/L 34.2
Undetected
(<0.5) 11
7 TN mg/L 46.2 18.1 44
8 TP mg/L 8.18 1.58 6.6
9 CN
- mg/L
Undetected
(<0.005)
Undetected
(<0.005) 0.11
10 Cr6+
mg/L Undetected
(<0.01)
Undetected
(<0.01) 0.11
11 Cr3+
mg/L 0.024 0.009 1.1
12 Fe mg/L 2.199 0.017 5.5
13 Zn mg/L 0.081 0.619 3.3
14 Cu mg/L 0.098 0.011 2.2
15 As mg/L 0.017 0.076 2.2
16 Hg mg/L Undetected
(<0.004)
Undetected
(<0.004) 0.011
17 Pb mg/L 0.167 Undetected
(<0.004) 0.55
18 Cd mg/L Undetected
(<0.0002) 0.026 0.11
19 Ni mg/L Undetected
(<0.001)
Undetected
(<0.0002) 0.55
20 Inorganic oils mg/L 1.7 Undetected
(<0.01) 11
21 Organic Oils mg/L 3.3 Undetected
(<0.01) -
22 S2-
mg/L 2.0 Undetected
(<0.1) 0.55
23 Cl2 mg/L - Undetected
(<0.1) 2.2
24
Phosphorus
based
Pesticides
mg/L Undetected
(<0.1)
Undetected
(<0.1) 1.1
25
Chloride
based
Pesticides
mg/L Undetected
(<0.1)
Undetected
(0.1) 0.11
26 Phenol mg/L 0.052 Undetected 0.55
66
(<0.005)
27 Coliforms MPN/
100mL 43x10
3
Undetected
(<3) 5500
Source: Environmental monitoring report of Nhon Trach 3 IP, Phase 2, 2011
Notes:
9/2011 samples were collected and analysed by SONADEZI
11/2011 samples were collected and analysed by Environmental Technology and
management Centre
QCVN 40:2011/BTNMT – National regulation on industrial ww, Column B, with
Kq=1.1 (Thi Vai flowrate > 200 m3/s) and Kf=1.0 (discharge rate ≤2,000m
3/day).
Wastewater monitoring results showed all parameters of the effluents meeting the
Vietnam national standard
After considering the positive results from Module 1 of Nhon Trach 3 IP, Phase 2’s
centralized waste water treatment plant. The project owners have decided to continue
with the same technology for Module 2. The diagram for Module 2 CETP is presented
in Figure 5 as below (as see, is connected straight into Module 1). More detail of
Module 2 was also presented in Section 1.5.2.2.
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Figure 9: Diagram of Module 2 of the treatment plant and how it’s connected to the
system of Module 1
3.4. SLUDGE TREATMENT TECHNOLOGY
EQUALISER B02
GRIT REMOVAL
GREASE TRAP
EQUALISOR TANK
PRIMARY
TREATMENT TANK
AERATION TANK
CLARIFIER
Module 2
SLUDGE-TANK B10
DEWATERING
BÙN
COMPRESSOR
DISINFECTION
B09
STABILISOR
PUMP BO1
GRIT REMOVAL
SCR02
PRIMARY TREATMENT
TANKS B02/B04/B05
GREASE TRAP B06
AERATION TANK B07
CLARIFIER B08
SCREENING SCRO1
INFLUENT
TREATED EFFLUENT
68
All of the sludge from Nhon Trach 3, Phase 2, centralized CETP will be compacted
into blocks and landfilled by Tai Tien Co.Limited.
The technology used by Tai Tien is already been approved by the MONRE under
license No 132/TCMT dated 01/12/2010 through the project earlier EIA report, and
the DONRE under Document 1197/SKHCN-QLC dated 9/0/2011 (attached with the
Appendix)
Just like the waste water treatment technology, after considering the positive results
from the treatment of hazardous wastes generated from Module, the project owners
have chose the same Tai Tien contractor to deal with the hazardous wastes of Module
2.
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IMPACTS ASSESSMENT OF WASTEWATER DISCHARGE
INTO RECEIVING WATER BASIN
4.1. EFFECTS ON WATER QUALITY
4.1.1. Pollution Load
At the maximum load of 2,000 m3/day, the pollutant load can be estimated as follows:
Table 25: Pollutant Load in Wastewater of Nhon Trach 3 IP Treatment Plant
No. Parameter Concentration
(mg/l)
Pollutant load
(kg/day)
1 TSS 20 40
2 BOD5 12 24
3 COD 35.5 71
4 N-NH3 0.89 1,78
5 Total Fe 0.28 0,56
Note: The average pollutant concentration is measured 15/05/2012 (1st sample at
10:35am; 2nd
sample at 13:15, 3rd
sample at 16:20)
4.1.2. Assessment on the Impacts on Receiving Sources
Based on the calculation of Table 28, after the Module 2 start operating, a flow of
2,000 m3/ day will contribute into Mareng Canal flow. This equivalent to 31.6 kg
TSS, 14 kg BOD5, 104 kg COD, 0.76 kg ammonia and 0.36 kg Total iron
Thi Vai river water is not utilized for domestic water supply but only for waterway
transport, irrigation and aquaculture among other. QCVN 08:2008/BTNMT column
B2 (the National Technical Regulation on Surface Water Quality) is applied to
evaluate the water quality.
Polluted wastewater can cause the following impacts when it is discharged to the
environment:
Increase turbidity of the river flow due to SS; alter photosynthetic efficiency and
reduce DO in the surface water. Suspended solid could be deposited at the outlet,
altering the river flow, river depth and hydraulic conditions. Organic sludge
depositing also causes oxygen deficient, forming toxic gases like H2S, CH4, etc. If
the receiving source is not cleaned properly, the water will be changed to black
and smelly.
Increase organic pollution load (BOD5, COD), increasing organic and inorganic
compound oxidization, reducing DO concentration in the water.
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Increase nutrients in the water (total N, total P), causing eutrophication
Reduce load bearing and purifying capacity of the river.
Affect to drinking and production water quality.
Affect to load bearing and purifying capacity of receiving sources.
As Mareng Canal is quite short (1.5 km) with small slope, and is under affected by
tide, the disperse of pollutants toward downstream from Mareng is slow. Furthermore
this river section also receives a 5,000 m3/day from hung Nghiep Formosa Co.Lmited,
that’s why the self-mechanism is overall limited. Especially when Mareng is the only
discharge road from project site toward the main river (Thi Vai)
As the project treated wastewater will join other discharged sources toward Thi Vai
river. That’s why the negative impacts of the project toward Thi Vai will be presented
more detail in Section 4.7 “Accumulated and integrated Impacts”
4.2. EFFECTS ON ENVIRONMENT AND AQUATIC ECOSYSTEM
Increase turbidity, reduce DO, affecting to photosynthesis efficiency, altering
number of aquatic species in the water.
Impact on food chain of the ecosystem.
If the river could not purified water will be polluted by organic substance and
nutrients, affecting seriously to aquatic life, reducing biodiversity (species number
and density), etc. narrowing habitat of small animal species in mangrove forest.
Pollution of nutrients: Proper nutrient content will promote algae growing
adequately in the food cycle. However, if it increases significantly eutrophication
will occur, causing organic pollution.
Nitrogen Impacts:
+ Toxic to fish at high concentration
+ Small NH3 concentration and NO3- are nutrients to algae growth.
+ Conversion of NH4+ to NO3
- needs large volume of DO.
Impacts of Phosphorus:
Phosphorus is an essential nutrient for algae growth. High concentration will promote
algae growth. When algae died it will be organic food for bacteria, altering oxygen
content, causing fish dead.
Organic Substance Pollution: reduce DO, threatening to fish and other aquatic
species.
Impacts of wastewater discharge to mangrove forests (Long Thanh – Nhon Trach and
Can Gio district) are not considered yet.
71
4.3. EFFECTS ON HYDROLOGY
Ma reng Canal flow volume is around 2 m3/s during dry season and increase to
<10m3/s during flooding season. The wastewater volume of Nhon Trach 3 IP
Treatment Plant is about 2,000 m3/day and night, equally to 0.023 m
3/s which will not
increase the water flow or the change hydraulic regime of Thi Vai River even during
dry season.
4.4. EFFECTS ON AIR
The maximum capacity of Module 2 of the wastewater treatment facility of Nhon
Trach 3 IP, Phase 2 is 2.000 m3/day. They could emit odor, H2S, Hydrocarbons,
Mercaptan among others affecting to areas near the outlet. However currently there is
no detected odour from the Nhon Trach 3 IP Treatment Plant’s discharges, and was
reflected through the surveying of residents living along Mareng Canal. Hence it can
be concluded that the discharge wastewater does not affect local air quality.
Obviously, the discharge from the Treatment Plant will be really small compare to Thi
Vai River flowrate even during dry season (0.023 m3/s vs. 10 m
3/s). So the affect
toward Thi vai also minimum
4.5. IMPACTS OF RISK AND ACCIDENTS
The effluent is quite large at 2,000 m3/day of the treatment facility could cause river
bank erosion. The large effluent may also disturb the river flow, affect small canoe
navigation in the outlet area. However as the addition discharge is only 0.23 m3/s
while the canoe trip record here is small, just 2-3 canoes travelling on the Canal a day,
therefore the affect should be minimal
4.6. SOCIAL-ECONOMIC AND DOWNSTREAM WATER USE IMPACTS
Wastewater from the treatment facility contains organic substances (BOD5, and
COD), causing turbidity increase in Thi Vai River water, offensive odor at the outlet.
The effluent discharge can affect to socio-economic as follows:
The discharge of treated waste water into Mareng and Thi vai river more or less will
impact on the economical activities of residents living along the river. However at this
moment, the local government still has not received any complaints from the residents
within the affected areas. The impact is analysed generally to be low considering the
discharge rate of only 2,000 m3/day and waste water quality meeting the QCVN
40:2011/BTNMT column B (kq=1.1; kf =1.0)
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4.7. CUMULATIVE IMPACTS
Thi Vai River is the final wastewater receiving source of Nhon Trach 3 IP. As
mentioned before, the river water is not used for drinking purpose. The effluent, thus,
have met TCVN 5945:2005 column B, Kq=1.1 and Kf depending on the discharge
volume of the industries (pursuant to Appendix 1 of Decision No. 65/2007/QD-UBND
dated December 11, 2007 of Dong Nai PC on environmental zoning for surface water
basin to receive industrial wastewater..
At this moment, Thi vai river is the receiving body for the waste water from Nhon
Trach IPs (1, 2 & 3, Clothing IP), Go Dau IP (Long Thanh District), and Phu My 1
(Ba Ria –Vung Tau Province). The intake for water supply form Thi vai river is small,
with slow river speed, and narrow basin. As the river is heavily affected by tides, the
mixing rate of river is slow, and the flow toward the sea is small. That’s why the
wastewater from Nhon Trach 3 will cause some problematic negative impacts towards
the basin if is not treated properly.
However, the effluent is small compared to the river flow and the wastewater is
treated in compliance with Vietnam environmental standard so the impact is
insignificant.
To analyse the accumulated impacts of the project toward Mareng canal and Thi Vai
River, we will have to analyse the discharge receiving capacity of Mareng and Thi
Vai. The assessment will be based on Circular 02/2009/TT-BTNMT dated 19/3/2009
of the MONRE
The wastewater of the project has to meet the national regulation on industrial
discharge: QCVN 40:2011/BTNMT (column B), Kq=1.1, Kf=1.0, before being
allowed to discharge into Mareng and Thi Vai
4.7.1. Mareng Pollution Loads Analysis
Mareng pollution loads can be analysed by the limits of polluting parameters in
Mareng canal water. It can be presented in table below.
Table 26: Pollutant concentrations of Mareng
Parameters BOD COD TSS As Pb Cd Hg
Ctc (mg/l) 15 30 50 0,05 0,05 0,01 0,001
Note: Limitation value Ctc is based on QCVN 08:2008/BTNMT, column B1.
4.7.1.1. Max Pollution loads
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Max pollution load that nearby surface water sources can receive, will be calculated
using below equation:
Ltd = (Qs + Qt) x Ctc x 86.4
When:
- Ltd: max pollution load of that water sources with a certain pollutants;
- Qs: Flow rate during dry season, Qs= 2.0 m3/s;
- Qt: waste water flowrate, Qt = 2,000 m3/day = 0.024 m
3/s;
- 86.4 is the coefficiency from (m3/s)x(mg/l) to (kg/day).
The max pollution load that nearby surface water sources can receive will be
presented in below table:
Table 27: The max pollution load that nearby surface water sources can receive
Parameters BOD COD SS As Pb Cd Hg
Qs + Qt
(m3/s)
2.024 2.024 2.024 2.024 2.024 2.024 2.024
Ctc (mg/l) 15 30 50 0.05 0.05 0.01 0.001
Ltd (kg/day) 2623.1 5246.2 8743.7 8.7 8.7 1.7 0.2
4.7.1.2. Current Pollution Loads
Current pollution loads will be calculated using below equation:
Ln = Qs x Cs x 86.4 When:
- Ln: Present Pollution Loads in receiving water body;
- Qs: Flow rate during dry season, Qs= 2.0 m3/s;
- Cs: Max concentration of certain pollutants in the river before receives the
waste water discharge;
- 86.4 is the coefficiency from (m3/s)x(mg/l) to (kg/day).
The Current pollution loads will be presented in below table:
Table 28: The current pollution loads.
Parameter
s BOD COD SS
As Pb Cd Hg
Qs (m3/s) 2 2 2 2 2 2 2
Cs (mg/l) 6 35 30 0.044 UD UD UD
Ln (kg/day) 1036.8 6048.0 5184.0 7.6 - - -
Notes: Cs is the average analysed results of Mareng Canal 11/2009. UD= undetected
4.7.1.3. Pollution loads from discharge source
Pollution loads from discharge sources will be calculated using below equation:
Lt = Qt x Ct x 86.4
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When:
- Lt: Pollution loads in effluent (kg/day);
- Qt: Discharge flow rate, Qt= 0,024 m3/s;
- Ct: Max concentration of certain pollutants in discharge;
- 86.4 is the coefficiency from (m3/s)x(mg/l) to (kg/day).
Pollution loads from discharge sources will be presented in below table:
Table 29: Pollution loads from discharge sources
Parameters BOD COD SS As Pb Cd Hg
Qt (m3/s) 0.024 0.024 0.024 0.024 0.024 0.024 0.024
Ct (mg/l) 12 35 20 0,0267 UD UD UD
Lt (kg/day) 24,88 73,27 41,47 0,06 - - -
Notes: Pollutants concentration in effluents is taken from Monitoring Report 11/2011
UD= undetected
4.7.1.4. Mareng Pollution loads receiving capacity
Mareng receiving capacity of these pollution loads will be calculated using below
equation:
Ltn = (Ltd – Ln - Lt) x Fs
When:
- Ltn: Mareng pollution loads receiving capacity (kg/day);
- Ltd: Max pollution load of that water sources with a certain pollutants
(kg/day);
- Ln: Present Pollution Loads in receiving water body (kg/day);
- Lt: Pollution loads in effluent (kg/day);
- Fs: safety coefficiency, Fs = 0.3 – 0.7, the project chose Fs = 0.5.
Mareng pollution loads receiving capacity after received the discharge from the CETP
can be summarised as below:.
Table 30: Mareng pollution loads receiving capacity after received the discharge
Parameters BOD COD SS As Pb Cd Hg
Ltd (kg/day) 2623.1 5246.2 8743.7 8.7 8.7 1.7 0.2
Ln (kg/day) 1036.80 6048.00 5184.00 7.60 - - -
Lt (kg/day) 24.88 73.27 41.47 0.06 - - -
Ltn (kg/day) 780.71 -437.53 1759.10 0.54 4.37 0.87 0.09
Conclusion: Ma Reng Canal, after received the treated waste water from the IP will
still be able to sustain the loads of parameters BOD, SS, As, Pb, Cd and Hg and
remain within national standards. COD levels are already over the river maximum
75
pollution loads; thus the additional COD load will not in themselves cause a change in
water quality of the canal with respect to existing standards.
4.7.2. Thi Vai Pollution Loads Analysis
Thi Vai pollution loads can be analysed by the limits of polluting parameters in
Mareng canal water. It can be presented in table 29 as below
Table 31: Pollution load of Thi Vai
Parameters BOD COD TSS As Pb Cd Hg
Ctc (mg/l) 15 30 50 0.05 0.05 0.01 0.001
Note: Limitation value Ctc is based on QCVN 08:2008/BTNMT, column B1.
4.7.2.1. Max Pollution loads
Max pollution load that nearby surface water sources can receive, will be calculated
using below equation:
Ltd = (Qs + Qt) x Ctc x 86.4
When:
- Ltd: max pollution load of that water sources with a certain pollutants;
- Qs: Flow rate Qs of Thi Vai=243.0 m3/s (Under Decision No 65/2007/UBND
of 11/12/2007 by Dong Nai people Committee);
- Qt: waste water flowrate, Qt = 2,000 m3/day = 0.024 m
3/s;
- 86.4 is the coefficiency from (m3/s) x (mg/l) to (kg/day).
The max pollution load that nearby surface water sources can receive will be
presented in below table:
Table 32: The max pollution load that nearby surface water sources can receive
Parameters BOD COD SS As Pb Cd Hg
Qs + Qt
(m3/s)
2.024 2.024 2.024 2.024 2.024 2.024 2.024
Ctc (mg/l) 15 30 50 0.05 0.05 0.01 0.001
Ltd (kg/day) 317,551.1 635,102.2 1,058,503.7 1,058.5 1,058.5 211.7 21.2
4.7.2.2. Current Pollution Loads
Current pollution loads will be calculated using below equation:
Ln = Qs x Cs x 86.4 When:
- Ln: Present Pollution Loads in receiving water body;
- Qs: Qs of Thi vai= 243.0 m3/s (Under Decision No 65/2007/UBND of
11/12/2007 by Dong Nai people Committee);
76
- Cs: Max concentration of certain pollutants in the river before receives the
waste water discharge;
- 86.4 is the coefficiency from (m3/s)x(mg/l) to (kg/day).
The Current pollution loads will be presented in below table:
Table 33: The current pollution loads.
Parameters BOD COD SS As Pb Cd Hg
Qs (m3/s) 243 243 243 243 243 243 243
Cs (mg/l) 4 27 24 0,08 UD UD UD
Ln (kg/day) 73,483.2 556,372.8 493,387.2 1,753.10 - - -
Notes: Cs is the average analysed results of Mareng Canal 11/2009.
4.7.2.3. Pollution loads from discharge source
Pollution loads from discharge sources will be calculated using below equation:
Lt = Qt x Ct x 86.4 When:
- Lt: Pollution loads in effluent (kg/day);
- Qt: Discharge flow rate, Qt= 0,024 m3/s;
- Ct: Maximum concentration of certain pollutants in discharge;
- 86.4 is the coefficiency from (m3/s)x(mg/l) to (kg/day).
Pollution loads from discharge sources will be presented in below table:
Table 34: Pollution loads from Mareng into Thi Vai
Parameters BOD COD SS As Pb Cd Hg
Qt (m3/s) 0.024 0.024 0.024 0.024 0.024 0.024 0.024
Ct (mg/l) 20 46 128 0.002 0.005 UD UD
Lt (kg/day) 3497.47 8044.19 22383.82 0.35 0.87 0 0
Notes: Pollutants concentration in effluents is taken from Monitoring Report 11/2011
4.7.2.4. Pollution loads receiving capacity of Thi Vai
Thi Vai receiving capacity of these pollution loads will be calculated using below
equation:
Ltn = (Ltd – Ln - Lt) x Fs
When:
- Ltn: Mareng pollution loads receiving capacity (kg/day);
- Ltd: Max pollution load of that water sources with a certain pollutants
(kg/day);
- Ln: Present Pollution Loads in receiving water body (kg/day);
- Lt: Pollution loads in effluent (kg/day);
- Fs: safety coefficiency, Fs = 0.3 – 0.7, the project chose Fs = 0.5.
77
Mareng pollution loads receiving capacity after received the discharge from the CETP
can be summarised as below:.
Table 35: Mareng pollution loads receiving capacity after received the discharge
Parameters BOD COD SS As Pb Cd Hg
Ltd (kg/day) 317,551.1 635,102.2 1,058,503.7 1,058.5 1,058.5 211.7 21.2
Ln (kg/day) 73,483.2 556,372.8 493,387.2 1,753.1 - - -
Lt (kg/day) 1,061.7 6,121.3 5,225.5 7.7 - - -
Ltn (kg/day) 121,503.1 36,304.1 279,945.5 -351.1 529.3 105.9 10.6
Conclusion: Thi Vai River, after received the treated waste water from the IP will still
be able to sustain the loads of parameters BOD, COD, SS, Pb, Cd and Hg without
exceeding maximum pollution loads. Only arsenic (As) is already over the river
maximum pollution loads.
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MITIGATION MEASURES
5.1. ENVIRONMENTAL MANAGEMENT PLAN AND RISK MANAGEMENT
PLAN
5.1.1. Typical mitigation measures for the site clearance phase
The CETP of Nhon Trach 3 IP – Phase 2 is located in a clearance area in Road No. 2,
Nhon Trach Industrial Park No. 3 - Phase 2, therefore, it is not necessary to carry out
any additional to obtain the land for constructing CETP. This process has been done
during construction phase of industrial zones.
5.1.2. Typical mitigation measures for CETP construction
5.1.2.1. Water Pollution Mitigation Measures
Lubricant scrap shall be collected properly in the course of repairing and
maintenance process, preventing pollution in the local area.
5.1.2.2. Air Environment Pollution Mitigation
To spray water as needed to minimize dust pollution.
To manage traffic flow properly; inspect construction equipment and machine and
maintain them properly;
To clean vehicles properly prior leaving the constructions
5.1.2.3. Solid Waste Pollution Mitigation Measures
Solid wastes from construction activities, e.g. cement, brick, sand, stone, material
shall be collected and categorized to reuse for land reclamation;
Domestic solid waste and nonhazardous industrial waste shall be collected to
specific tank and outsource Bay Ha Long Co., Ltd. to transfer the wastes to dispose
properly (Bay Ha Long Co., Ltd. is collecting domestic waste at the centralized
wastewater treatment system at Nhon Trach 3 IP, Phase II, Module 1.
Metal, nylon and paper scraps are sold to recycling establishments.
Hazardous solid wastes such as oil-tainted clout, lubricant, among others shall be
collected to specific tanks and outsourced to Tai Tien Co., Ltd. to collect and dispose
properly.
To stipulate regulations on sanitation preservation with proper penalty for the one
who committed to the regulation violation.
To request workers enforcing occupational safety regulations, raising public
awareness on environment protection.
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5.1.2.4. Sludge Management to Minimize Adverse Impacts
Sludge is not generated in the construction stage
5.1.2.5. Soil Pollution Mitigation
The impact on soil environment is insignificant so it does not require soil pollution
prevention measures.
5.1.3. Typical mitigation measures for CETP operation
5.1.3.1. Water Pollution Mitigation Measures
(1). Industrial Wastewater
Industrial wastewater from enterprises in Nhon Trach 3 IP, Phase 2 shall be treated
meeting the limit stipulated by Nhon Trach 3 IP One-member Affiliated Co. (see the
limits of allowable parameters of the centralized wastewater treatment connection in
appendix).
The centralized wastewater treatment system, Module 1 of Nhon Trach 3 IP, Phase
2 was developed and is operating stably with design capacity of 2,000m3/day to meet
the wastewater treatment demand of existing enterprises in the industrial zone. The
total wastewater volume is about 780 m3/day. The centralized wastewater treatment
system, module 2 of Nhon Trach 3 IP will be connected to Module 1 to expand the
treatment capacity of the system.
The treated wastewater is monitored properly in compliance with Vietnam
Technical Regulation QCVN 40:2011/BTNMT (Column B) to discharge into Lo Ren
culvert, flowing to Thi Vai River.
The automatic wastewater monitoring system (with automatic recording system)
will be installed to monitor flowrate, pH, DO, TSS and COD in the treated
wastewater.
(2). Domestic Solid Waste
Domestic solid waste will be collected to be treated in the septic tank.
(3). Storm Water
Tin Nghia Corporation developed a separated drainage system in Nhon Trach 3 IP,
Phase 2. The storm water is collected to the open canal and discharge into Lo Ren
culvert, flowing to Thi Vai River.
The reinforce concrete drainage system cover 30,111.4 m long, comprising of D600
= 2,042 m; D800 = 6,905.6 m; D1000 = 7,020.2 m; D1200 = 485.6 m; D1500 =
80
11,254.2 m open canal B2000 = 997.5 m; B4000 = 982 m; closed box culvert B3000 =
524.3 m meeting drainage requirements in the IP.
5.1.3.2. Air Environment Impact Mitigation Measures
(1). General Measures to Minimize Air Pollution
The investor will take the following measures to minimize air pollution and impacts
on worker’s health in the operation process:
To develop the centralized wastewater treatment system in compliance with
regulations on safety and industrial sanitation, meeting the ventilation standard by
natural wind and forced fan.
To clean the wastewater treatment zone properly
(2). Air Pollution Mitigation at the Centralized CETP
1). Use of Bio-Products
If offensive arises, odor bio-products such as GEM-P, GEM-K, GEM, CTA-T will be
used to minimize offensive odor from waste storage yard, sludge yard, etc.
2). Odor Oxidization
Odors will be deoxidized by strong oxidizers such as H2O2 or Ozone. H2O2 will be
periodically electrolyzed to treat odor. Ozone generator may be installed to process
odor. Ozone generator has been applied widely to deoxidize odor in Vietnam.
(3). Air Pollution Control from Traffic Air Emission
The investor will take appropriate measures to control air pollution from traffic,
including:
Concretise inner plant roads and clean roads properly; install auto-water spraying
system to water the roads effectively
To turn off transport vehicle while waiting in the plant
To regularly maintain and inspect vehicles
(4). Noise Control Measures
The investor will take following measures to reduce noise the operation process:
To install rubber buffer and anti-vibration spring for heavy loading equipments;
To separate intensive noise sources (200 mm thick wall, 100 mm buffer zone,
heavy wooden door, etc.);
81
To regularly maintain equipment properly: the maintenance cycle is in every 4—6
months for branch new equipment and in every 3 months for the old equipment;
Plant trees to mitigate noise dispersion.
(5). Mitigation of Heat Residue
Temperature will exceed the allowable standard from 1 – 30C in the CETP in sunny
days. Ventilation will be designed properly. Drinks will be provided to workers.
5.1.3.3. Solid Waste Impact Mitigation
The company got the hazardous waste owner registration book No. 587/SĐK-TNMT
dated November 5, 2010, hazardous solid waste management code No. 75001375
When the second module is developed completely the solid waste treatment contract
will be signed with the following agencies:
Domestic solid waste: The company signed the contract with Bay Ha Long Co.,
Ltd to collect the domestic solid waste properly (attached with the solid waste
collection contract).
Hazardous Solid Waste: The company continues singing the contract with Tai Tien
Co. Ltd. To collect and transport hazardous solid waste properly.
5.1.3.4. Sludge Impact Mitigation Measures
Sludge generated at the centralized wastewater treatment facility will be collected and
treated by signing the contract with Tai Tien Co., Ltd.
(1). Collection and transport processes
Hazardous sludge from the CETP of Nhon Trach 3 IP – Module 2 will be contracted
with Tai Tien Co Limited to collect, transport and treat appropriately as below:
Hazardous sludge after was pumped and compressed is marked hazardous and
stored separately in hazardous wastes warehouse
Periodically, Tai Tien Co Limited will bring their own vehicles to collect, and
travel back with this path: Nhon Trach 3 IP 25B Provincial road 51 national
road Thai Lan 3-way crossroads Trang Bom 1A national road Tay Hoa
District Tai Tien hazardous treatment plant (Nhan Hoa commune, Tay Hoa
District).
(2). Sludge Treatment Technology at Tai Tien Ltd. Co.
Sludge from the wastewater treatment system currently contracted with Tai Tien
Ltd. Co. and will be treated as below:
The dried and dewatered sludge contains hazardous substances will be mixed with
cement, then compressed into blocks to reduce pollution disperse into the
82
environment. As cement has high alkalinity, the heavy metals will kept under
hydroxide or carbonate salts.
The compressing often also often include Ca(OH)2 solution (to increase its acidity),
or coal slag. Coal slag and Ca(OH)2 can stabilize As, Cd, Cr, Cu, Fe, Pb, Mg, Se, Ag,
Zn…The blocks will then be landfilled under required standard inside the treatment
plant border, rather than hand it to third party.
The % of mixing based on mass is as below:
Table 36: Mixing Rates
Hazardous Wastes Incineration Slag Cement Lime Sand Water
100 20 35 10 100 65
30% 6% 10% 3% 30% 19%
With the mixing as above, the hazardous after compressed into blocks will increase
weights by 2.75 times, due to 63.6% of the mass from addition.
The diagram for solidifying process can be seen as below:
Figure 10: Sludge solidifying process
(3). Tai Tien landfill site
Landfilling
Mixing
Incineration slag Inorganic Sludge
Additions
Compressing
Test/
sample
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Tai Tien landfill site is constructed based on design TCXDVN 261:2001 with double
layers and 2 trends to collect landfill leachate. The detail layers are as below
+ Compacted original soil;
+ 0.3 m compacted clay layer (filtration coefficiency k 10-7 cm/s);
+ 2 mm HDPE layer;
+ 0.3 m sand filtration layer, (filtration coefficiency k = 0,9);
+ Geotexttile layer;
Area: 156.73 m x 33.24 m x 11 m
Total potential landfill volume: 61,378 m3
Filled duration: 8 years (if the landfilling rate of hazardous solid wastes is 10 tons/
day).
Actual landfilling rate at this point: 380 kg/day or around 10 tons per months
5.1.3.5. Soil Environment Impact Mitigation
Soil is not affected in the operation process.
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Table 37: Typical mitigation measures for CETP construction
Issues/impacts Mitigation measures applied for CETP Vietnam code/regulation
Air pollution
Construction vehicles must undergo a regular emissions check and get
certified named: “Certificate of conformity from inspection of quality,
technical safety and environmental protection” following Decision No.
35/2005/QD-BGTVT
TCVN 6438-2005: Road
vehicles. Maximum permitted
emission limits of exhaust gas;
Decision No. 35/2005/QD-
BGTVT on inspection of
quality, technical safety and
environmental protection;
QCVN 05:2009/BTNMT:
National technical regulation
on ambient air quality
Maintain vehicles and equipments daily and every 6 months (or 8.000 km on
the road)
Do not burn waste on site
Monitoring air quality for dust emission, noise and ambient air quality
Dust generation
Removing waste out of construction site as soon as possible QCVN 05: 2009/BTNMT:
National technical regulation
on ambient air quality
Cover the transport means to avoid dust, soil and building materials
scattering during transportation
The Contractor is responsible for compliance with relevant Vietnamese
legislation with respect to ambient air quality.
The Contractor shall ensure that the generation of dust is minimized and is
not perceived as a nuisance by local residents and shall implement a dust
control program to maintain a safe working environment and minimize
disturbances for surrounding residential areas/dwellings
The Contractor shall implement dust suppression measures (e.g. use water
spraying vehicles to water roads, covering of material stockpiles, etc.) as
required.
Exposed soil and material stockpiles shall be protected against wind erosion
and the location of stockpiles shall take into consideration the prevailing
wind directions and locations of sensitive receptors.
Disruption of vegetative cover and
ecological resources
The Contractor shall prepare vegetation protection measures to be included
in the Construction Environment Management Plan for prior approval by the
Construction Engineer, following relevant regulations. The Clearance Plan
shall be approved by Construction Supervision Consultant and followed
strictly by contractor. Areas to be cleared should be minimized as much as
possible.
Law on Environment
protection No. 52/2005/QH11
85
Issues/impacts Mitigation measures applied for CETP Vietnam code/regulation
Noise and Vibration
Avoid construction at night (10 pm – 6 am) QCVN 26:2010/BTNMT:
National technical regulation
on noise
QCVN 27:2010/BTNMT:
National technical regulation
on vibration
The contractor is responsible for compliance with the relevant Vietnamese
legislation with respect to noise and vibration.
All vehicles must have appropriate “Certificate of conformity from
inspection of quality, technical safety and environmental protection”
following Decision No. 35/2005/QD-BGTVT; to avoid exceeding noise
emission from poorly maintained machines.
Increased turbidity in surface water Ensure the technical requirements on treatment of wastewater and run-offs
Good management of soil erosion and sedimentation
Domestic wastewater of workers
Build portable or use temporary toilet in IZs (if needed) QCVN 14:2008/BTNMT:
National technical regulation
on domestic wastewater
Construct septic tank (if needed) and withdraw the wastewater and sewage
when the construction finishes
The Contractor must be responsible for compliance with the relevant
Vietnamese legislation relevant to wastewater discharges into watercourses.
Wastewater over permissible values set by relevant Vietnam technical
standards/regulations must be collected in a conservancy tank and removed
from site by licensed waste collectors.
Drainage and sedimentation control
Periodic dredging sewers TCVN 4447:1987: Earth
works-Codes for construction
Decree No. 22/2010/TT-BXD
on regulation of construction
safety
QCVN 08:2008/BTNMT –
National technical regulation
on quality of surface water
To avoid sediment-laded runoff that could adversely impact watercourses,
install sediment control structures where needed to slow or redirect runoff
and trap sediment until vegetation is established.
Ensure drainage system is always maintained cleared of mud and other
obstructions and periodically check the status of the drainage system
Areas of the site not disturbed by construction activities shall be maintained
in their existing conditions.
Earthworks, cuts, and fill slopes shall be properly maintained, in accordance
with the construction specifications of CETP outlets or AMS.
The Contractor shall follow the detailed drainage design included in the
construction plans, intended to prevent storm water from causing local
flooding or scouring slopes and areas of unprotected soil resulting in heavy
sediment loads affecting local watercourses (Arrange drainage ditches
around the construction area to collect rainwater runoff and sedimentation
pits before leading into water resources)
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Issues/impacts Mitigation measures applied for CETP Vietnam code/regulation
Ground water pollution due to sewage leak Leaks on drainage system must be detected and corrected promptly
QCVN 09:2008/BTNMT:
National Technical Standard
on underground water Quality
Solid Waste Management
Before construction, a solid waste control procedure (storage, provision of
bins, site clean-up schedule, bin clean-out schedule, contract with waste
management company or waste treatment company to collect waste daily,
etc.) must be prepared by Contractors and included in Construction
Environment Management Plan and it must be carefully followed during
construction activities.
Decree No. 59/2007/ND-CP on
solid waste management
Before construction, all necessary waste disposal permits or licenses must be
obtained.
Solid waste may be temporarily stored on site in a designated area approved
by the Construction Supervision Consultant and IZA prior to collection and
disposal through a licensed waste collector. In case, if not removed off site,
solid waste or construction debris shall be disposed of only at sites identified
and approved by the Construction Supervision Consultant and included in
the solid waste plan. Under no circumstances shall the contractor dispose of
any material in environmentally sensitive areas, such as in areas of natural
habitat or in watercourses.
Waste storage containers shall be covered, tip-proof, weatherproof and
scavenger proof.
No burning, on-site burying or dumping of solid waste shall occur.
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Issues/impacts Mitigation measures applied for CETP Vietnam code/regulation
Chemical or hazardous wastes
Chemical waste of any kind shall be disposed of at an approved appropriate
landfill site and in accordance with local legislative requirements. The
Contractor shall obtain needed disposal certificates.
Decision No. 23/2006/QD-
BTNMT with list of hazardous
substance
Circular No. 12/2011/TT-
BTNMT on management of
hazardous substance Used oil, lubricants, cleaning materials, etc. from the maintenance of
vehicles and machinery shall be collected in holding tanks and removed
from site by a specialized oil recycling company for disposal at an approved
hazardous waste site.
Unused or rejected tar or bituminous products shall be returned to the
supplier’s production plant.
Relevant agencies shall be promptly informed of any accidental spill or
incident. Prepare and initiate a remedial action following any spill or
incident. In this case, the contractor shall provide a report explaining the
reasons for the spill or incident, remedial action taken,
consequences/damage from the spill, and proposed corrective actions.
Store chemicals appropriately and with appropriate labeling
Appropriate communication and training programs should be put in place to
prepare workers to recognize and respond to workplace chemical hazards
Traffic management Streamline traffic and navigation with consultations with local government
and community, and traffic police
Law on traffic and
transportation No.
23/2008/QH12
Law on construction No.
16/2003/QH11
Decree No. 22/2010/TT-BXD
on regulation of construction
safety
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Issues/impacts Mitigation measures applied for CETP Vietnam code/regulation
Health and safety
Limit speed at the construction site Decree No. 22/2010/TT-BXD
on regulation of construction
safety
Instruction No. 02 /2008/CT-
BXD on safety and sanitation
issues in construction agencies
TCVN 5308-91: Technical
regulation on safety in
construction
Decision No. 96/2008/QD-
TTg on clearance of UXO.
Avoid transportation in rush hours
Installation of lighting at night
Equipped workers with labor protection instruments (ie ear pieces are
provided to and used by workers who must use noisy machines such as
piling, explosion, mixing, etc., for noise control and workers protection.)
Training workers on occupational safety regulations
Keep the construction area safe and orderly; If blasting is to be used,
additional mitigation measures and safety precautions must be outlined in
the CEMP.
Clean the site prior to completion and closure; if previous assessments
indicate there could be unexploded ordnance (UXO), clearance must be
done by qualified personnel and as per detailed plans approved by the
Construction Engineer
Workers should carry protective clothing and goggles to protect and not to
work too long in the closed environment;
Prepare and implement action plan to cope with risk and emergency (ie in
case of problems, stop the construction and implement of necessary
measures) as well as well prepare emergency aid service at construction site
Contractor shall comply with all Vietnamese regulations regarding worker
safety.
Communication with local communities Copies in Vietnamese of these ECOPs and of other relevant environmental
safeguard documents shall be made available to local communities and to
workers at the site.
Decree No. 73/2010/ND-CP
on administrative penalization
security and society issues
Provide a community relations contact from whom interested parties can
receive information on site activities, project status and project
implementation results.
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Issues/impacts Mitigation measures applied for CETP Vietnam code/regulation
Provide all information, especially technical findings, in a language that is
understandable to the general public and in a form of useful to interested
citizens and elected officials through the preparation of fact sheets and news
release, when major findings become available during project phase.
Monitor community concerns and information requirements as the project
progresses;
Respond to telephone inquiries and written correspondence in a timely and
accurate manner;
Chance find procedures
(in case if the Contractor discovers
archeological sites, historical sites,
remains and objects, including graveyards
and/or individual graves during
excavation or construction)
Stop the construction activities in the area of the chance find and delineate
the discovered site or area; Secure the site to prevent any damage or loss of
removable objects.
Law on Cultural Heritage
(2002)
Law on Cultural Heritage
(2009) for supplementary and
reformation
Decree No. 98/2010/ND-CP
for supplementary and
reformation
In cases of removable antiquities or sensitive remains, a night guard shall
be arranged until the responsible local authorities or the Department of
Culture and Information takes over;
Notify the Construction Supervision Consultant who in turn will notify
responsible local or national authorities in charge of the Cultural Property
of Viet Nam (within 24 hours or less); Relevant local or national authorities
would be in charge of protecting and preserving the site before deciding on
subsequent appropriate procedures. This would require a preliminary
evaluation of the findings to be performed. The significance and
importance of the findings should be assessed according to the various
criteria relevant to cultural heritage; those include the aesthetic, historic,
scientific or research, social and economic values;
Decisions on how to handle the finding shall be taken by the responsible
authorities. This could include changes in the layout (such as when finding
an irremovable remain of cultural or archeological importance)
conservation, preservation, restoration and salvage;
Decisions concerning the management of the finding shall be
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Issues/impacts Mitigation measures applied for CETP Vietnam code/regulation
communicated in writing by relevant authorities;
Construction works could resume only after permission is granted from the
responsible local authorities concerning safeguard of the heritage.
Table 38: Typical mitigation measures for CETP operation
No. Issues Impacts Mitigation measures Implementer Supervisors Budget
sources Difficulties/barriers
needed to be considered
1 Pollution at the
outlets
Long-term Regular monitoring
Installing warning signs at
suitable positions
Regular dredging the manhole,
sewerage system
Reducing the spilling of
wastewater Control the preliminary
wastewater treatment at enterprises
Water Drainage
Company
IZA, DONRE,
IZD
Budget
operation of
UDC
Awareness of workers
and factories and CETP
2 Groundwater
contamination Long-term Monitoring and controlling the
groundwater quality in the area
Preventing infiltration of
anaerobic ponds
Preventing leakage at
connections or transitions in the
wastewater pipes
Operation Unit IZA, DONRE,
IZD Budget
operation of
CETPs
3 Operational
problems Long-term O&M training for workers
Monitoring of water quality to
evaluate the efficiency of the
operation
Installing the signs to warn
people of the risks of contacting the
Operation Unit IZA, DONRE,
IZD
Lack of training for
operational workers
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No. Issues Impacts Mitigation measures Implementer Supervisors Budget
sources Difficulties/barriers
needed to be considered
water bodies
Noticing by the communication
means Repairing as soon as accident
happens
Construct the bio- restoration
pond (if applicable) 4 Odors Long-term Ensuring the radius of buffer
zone at least 300 m
Planting trees in the buffer zone
to create landscape and prevent odor
dispersion
Regular maintenance of
treatment units
Solving operational accidents
Clearance of surroundings of the
ponds
Operation Unit IZA, DONRE,
IZD Lack of financial budget
for O&M
5 Noise Long-term Planting trees
Appropriate O&M regime
Operation Unit IZA, DONRE,
IZD
6 Waste from the
operation Long-term A good plan of collection and
treatment
Training for workers
Regular collection of sludge
Operation Unit IZA, DONRE,
IZD
7 Sludge
management Long-term Checking sludge quality in order
to have a suitable plan: drying and
using for making fertilizer or
disposing at the landfill, which based
on the sludge quality
Reducing the leakage along the
haulage distance because dust could
Operation Unit IZA, DONRE,
IZD Lack of covering the
haulage vehicles
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No. Issues Impacts Mitigation measures Implementer Supervisors Budget
sources Difficulties/barriers
needed to be considered
bear heavy metals and pathogens
which result in food contamination
and diseases related to skin and
respiratory system
Workers must be equipped with
appropriate safety clothes and prevent
sludge contact to open wounds
Dried sludge will be treated as
hazardous waste if sludge quality
does not meet standards.
8 Health and
working safety Long-term,
regularly Training and providing enough
equipments for checking labor health
At least two workers working in
a operating shift. Keeping a good personal hygiene
Prepare detailed guidance of
CETP operation manual
Operation Unit IZA, DONRE,
IZD
Table 39: Mitigation measures for environmental risks
No. Case Action plan responsibility
1
Complaints from the nearby industries and
community on environmental issues of
construction and operation activities
Immediately implement remedial measures if possible
Record in the logbook
Contractors
Discuss with investors, local government to address thoroughly the
contradictions
Contractors, NT3IP, DIZA,
DONRE, PC49
2 Construction or operational accidents
First aid and immediately transfer the victim to the nearest hospital
if necessary
Workers and local residents
Place the danger signs
Make record of the accident
Contractors, CETP, NT3IP,
DIZA
3 Failure operation of CETP Storage the untreated wastewater, built the biological pond if
possible
CETP, NT3IP, DIZA
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No. Case Action plan responsibility
Have the back up equipments/facilities
Place the danger signs and report to authorities
Avoid over waste loading from enterprises' wastewater
Training the staff on operation, regularly monitoring
Check the design and prepare the new unit of CETP
Prepare for accidental response action plan
4 Improper sludge disposal
Contract with relative permitted agencies to disposal sludge
properly if they are found to be hazardous to environment and
human health
CETP
Report and check frequently all emitted amount of sludge
Issue the strict penalties for violation cases DIZA, DONRE
5 Fires
Inform authorities (in particular, is that fire police).
Rescue the objects in the danger zone.
Actively isolate the fire with the existing facilities on site
(shepherds, water or fire extinguisher (if any)).
Contractors,
industries/enterprises CETP,
IZA, DIZA
Support under the guidance of the functional units until they are
present at the scene (especially in situations detect mines,
explosion caused by chemical substances etc.).
Contractors, CETP, NT3IP,
DIZA, industries
Support functional units, local government to set up security
perimeter around hazardous areas.
Contractors, CETP, NT3IP,
DIZA, industries/enterprises
Check the conditions of fire and explosion safety on site, ensuring
the problem does not continue.
Suspension of work if they violate conditions of fire safety.
Contractors, CETP, NT3IP,
DIZA, industries/enterprises
6 Electric accidents
Disconnect power sources in the incident area and surrounding
areas
Immediate rescue the objects in the danger zone
Explore the causes of accidents, checking power sources, wires and
contacts...
Contractors, CETP, NT3IP,
DIZA, industries/enterprises
Make records of accidents Contractors, CETP, NT3IP,
DIZA, industries/enterprises
S1-6 Environmental Consultant Team 94
5.1.4. Typical mitigation measures for environmental risks
The typical mitigation measures for environmental risks is shown in the table below.
S1-6 Environmental Consultant Team 95
Table 40: Mitigation measures for environmental risks
No. Case Action plan responsibility
1
Complaints from the nearby industries and
community on environmental issues of
construction and operation activities
Immediately implement remedial measures if possible
Record in the logbook
Contractors
Discuss with investors, local government to address thoroughly the
contradictions
Contractors, NT3IP, DIZA,
DONRE, PC49
2 Construction or operational accidents
First aid and immediately transfer the victim to the nearest hospital
if necessary
Workers and local residents
Place the danger signs
Make record of the accident
Contractors, CETP, NT3IP,
DIZA
3 Failure operation of CETP
Storage the untreated wastewater, built the biological pond if
possible
CETP, NT3IP, DIZA
Have the back up equipments/facilities
Place the danger signs and report to authorities
Avoid over waste loading from enterprises' wastewater
Training the staff on operation, regularly monitoring
Check the design and prepare the new unit of CETP
Prepare for accidental response action plan
4 Improper sludge disposal
Contract with relative permitted agencies to disposal sludge
properly if they are found to be hazardous to environment and
human health
CETP
Report and check frequently all emitted amount of sludge
Issue the strict penalties for violation cases DIZA, DONRE
5 Fires
Inform authorities (in particular, is that fire police).
Rescue the objects in the danger zone.
Actively isolate the fire with the existing facilities on site
(shepherds, water or fire extinguisher (if any)).
Contractors,
industries/enterprises CETP,
IZA, DIZA
Support under the guidance of the functional units until they are
present at the scene (especially in situations detect mines,
explosion caused by chemical substances etc.).
Contractors, CETP, NT3IP,
DIZA, industries
Support functional units, local government to set up security Contractors, CETP, NT3IP,
S1-6 Environmental Consultant Team 96
No. Case Action plan responsibility
perimeter around hazardous areas. DIZA, industries/enterprises
Check the conditions of fire and explosion safety on site, ensuring
the problem does not continue.
Suspension of work if they violate conditions of fire safety.
Contractors, CETP, NT3IP,
DIZA, industries/enterprises
6 Electric accidents
Disconnect power sources in the incident area and surrounding
areas
Immediate rescue the objects in the danger zone
Explore the causes of accidents, checking power sources, wires and
contacts...
Contractors, CETP, NT3IP,
DIZA, industries/enterprises
Make records of accidents Contractors, CETP, NT3IP,
DIZA, industries/enterprises
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5.2. RISK MANAGEMENT
The investor will take proper measures to prevent and response to environmental
incidents and risks as follows:
5.2.1.1. Environmental Incidents in Preparation and Construction Stages
The construction volume is small and carried out in short period. Incidents can be
prevented properly. Specifically:
(1). Fire and Explosion Prevention
Workers who work directly at the construction site will be trained on fire and
explosion methods.
Inflammable solvents and fuel shall be stored at isolated warehouses, far from
ignition sources.
Provide fire and explosion prevention and fighting equipments at fuel warehouses;
Provide proper fire and explosion prevention and fighting equipments in
compliance with existing regulations;
In case of fire and explosion: the investor shall cooperate with Nhon Trach District
Fire Police to response to the incident properly.
(2). Mitigation of Traffic Accident
Control and manage traffic properly; proper loading;
Raise public awareness on traffic safety and road law enforcement.
(3). Working Safety, Health Protection and Incident Prevention Measures
Compliance with the regulations on labor safety when elaborate construction plans;
proper machine operation, preventive measures; provide adequate labor protection
uniforms such as helmet, mask, gloves, clothing, welding glasses, shoes, boots, etc.
To closely monitor the construction process; minimize occupational accidents;
Develop fire and explosion prevention and fighting program, provide proper
equipment for responding to the incident if any.
5.2.1.2. Operation Stage
(1). Sanitation and Occupational Safety Measures
Equipment of the wastewater treatment facility comprises of various types. The
Corporation will carry out working safety regulation in compliance with existing
regulations.
For all other machinery systems, the operation regulation will be elaborated based
on their specs.
98
1). Safety for Workers:
To train workers for working safety regulation. The Corporation shall cooperate
with Working Safety Division of Dong Nai Department of Labor, War Invalid and
Social Affairs to train on safety regulation and operation of specific equipments to
secure safety;
Provide proper protection uniform for workers.
Train on and provide safety and sanitation information.
(2). Fire and Explosion Prevention and Response Measures
1). Fire and Explosion Safety:
Provide proper fire extinguisher
Train workers on fire and explosion prevention and response
Store inflammable fuels in isolated warehouses, far from ignition; install safety
valve, temperature monitoring equipment, fire alarm for solvent tanks
Provide adequate fire alarming system, information system; check and maintain
the fire extinguisher properly.
Smoking ban in inflammable zones
Provide fire and explosion prevention equipment adequately.
2). Equipment
The fire extinguishing system shall be installed, comprising of:
Fire –hydrant
Foam and gas fire extinguisher
Fire extinguisher for all workshops
Water for firefighting: tower, pond
For the Operation Room:
Provide ventilation system properly
Design and install electricity system properly; regularly maintenance to prevent
electricity leakage
Install automatic fire alarm system and proper fire extinguisher in the inflammable
zones.
3). Fire and Explosion Prevention and Response
In production spaces, fuel storage and product storage, there will be fire alarm,
communication and alarming system. Fire prevention and extinguishing devices and
means shall be regularly checked to ensure readiness;
99
Machines, equipment operated at high heat, high pressure will be managed via a
profile of technical inspection and registration status at state functional bodies.;
Inflammable solvents, fuels will be stored in isolated storage areas, far from
potential source of fire, electrical spark. Fire extinguishing system is combined with
distance of 10-12m among workshops for movement of vehicle and man, and
sufficient space to prevent spread of fire.
In fire risk spaces, workers must not smoke, carry lighter, matches and sparking or
igniting tools;
The company will cooperate with Dong Nai Fire Fighting Police to elaborate fire
prevention and response plan, training workers properly.
(3). Fuel Leakage Prevention and Response
The investor will cooperate with competent agencies to inspect the specifications of
the fuel storage system to prevent fuel leakage, specifically as follows:
Regularly examine safety of fuel tank to maintain, replace broken device, prevent
fuel leakage;
Install fence around the fuel tanks, 5-10 m far from the tank; install warning board,
fire ban properly
Fuel and chemical tank truck shall be registered, inspected and maintained
adequately.
Raising public awareness on fire and explosion prevention and fighting
In addition, the investor will cooperate closely with competent agencies to elaborate
fuel leakage prevention and response plan, inspect the technical system adequately.
(4). Anti-Lightning
Install lightning prevention system at high positions of the factory;
Install lightning conducting system, aggregated electricity conducting and system
improvement which applies new technology to get safe height;
Impulsive resistance < 10 while land’s resistance < 50,000 /cm2. Land-
contacting impulsive resistance >10 while land’s resistance > 50,000 /cm2;
Install the lighting prevention system for the whole project area and each
workshop/warehouse properly;
Using positive lightning prevention device; lightning conducting rods are installed
across the project to protect the estimated height of 10-14m;
Invest in the system in compliance with the infrastructure development construction
schedule.
(5). Failure of Centralized Wastewater Treatment System
100
Failure of centralized wastewater treatment system may occur since machines and
equipment in the system, including pump, stirring machine, chemical gasification
machine, are out of order (due to technical failure or power outage). Other possible
causes include worker’s failures to operate in accordance with technical requirements
leading to death of microorganisms and temporary stoppage of centralized wastewater
treatment system to replant microorganisms. Temporary stoppage of centralized
wastewater treatment system will create a big accumulated and untreated volume of
wastewater, leading to contamination of soil, water and air.
This incident can be avoided by conducting regular technical checks on operating
machines and equipment, replace and repair timely broken ones; provide backup
equipment, generator; provide proper technical training to workers.
One the incident occurs the investor will temporarily close all workshops that generate
wastewater to discharge to the centralized wastewater treatment system.
5.3. PUBLIC INFORMATION PROGRAM AND COMMUNITY RELATION
5.3.1. Public Consultation in EMP Report Preparation
During the construction and operation of the CETP of Nhon Trach 3 IP, Phase 2, the
project owners will publish all of the EMP information toward the People’s Committee
and nearby residents so the public can monitor/ supervise the project.
The EMP includes these key points:
The organization and activities of project environmental department;
Training, awareness promoting of environmental issues and measures relating to the
project;
Responsibilities of project owners in implement measures, impact mitigation
activities in the situation of environmental catastrophic during both the construction
and operation phases of the project;
Plans to operate environmental protection facility;
Plans to monitor wastes/emissions/ discharges sources and surrounding
environment during both the construction and operation phases of the project.
5.3.2. Information Dissemination
The environmental management plan was approved and publicized at the people’s
committee of Long Tho commune.
The environmental management plan covers:
Organization and operation of the specific environmental division of the project;
Environmental protection education and awareness strengthening;
101
Responsibility of the project owner in implementation of adverse impact mitigation
measures and environmental incident prevention and response in construction and
operation stages;
Environmental facilities operation plans;
Monitoring plan for waste sources: ambient air environment monitoring and other
monitoring activities in construction and operation stages.
5.4. TRAINING
The Industrial Zone is in the process of determining the precise training needs of its
staff and contracters to ensure efficient implementation of the EMP. The VIPMP will
provide support for this training.
5.5. ORGANIZATION OF ENVIRONMENTAL MANAGEMENT AND
RESPONSIBILITY FOR CETP AND IZ
The organization of environmental management and responsibility for CETP and
Nhon Trach 3 IP includes Environment Department of Nhon Trach 3 IP – Phase 2 and
CETP operation Team. Together other environmental management agencies at all
levels in Dong Nai province form an organization structure as is shown in Figure
below:
Figure 11: The Organization Structure of environmental management in Nhon Trach 3
IP – Phase 2
Environmental
Department
CETP
Nhon Trach 3 IP
(Tin Nghia Coporation)
DIZA
Industries
Pre-treatment
Plant
Wastewater
Dong Nai
People Commitee
Management
Wastewater
102
5.5.1. Environment Department of Nhon Trach 3 IP
5.5.1.1. Functions and Tasks
(1). Function
To advise the corporation manager on environmental management, and wastewater
treatment facility as well as to provide environmental consulting services for the
customers.
To elaborate and propose environmental management plans, schemes and measures;
the centralized wastewater treatment facility operation plan and to provide
environmental consultation services for enterprises in and outside Nhon Trach 3 IP.
To cooperate with other competent agencies and customers in management the
industrial park environment in compliance with “the Regulation on industrial parks,
export processing zone and high-tech parks” which was promulgated together with
Decree No. 36/CP in April 24, 2007 of the Government as well as other related
regulations.
To operate the centralized wastewater treatment system and other activities related
to environment in the industrial park.
To inspect, supervise, operate the centralized wastewater treatment facility and
wastewater quality of enterprises in Nhon Trach 3 and conduct repairing in case of
failure.
To treat wastewater of Nhon Trach 3 IP meeting Vietnam standard prior
discharging to the environment.
To manage, operate and utilize the centralized wastewater facility effectively and
efficiently.
(2). Tasks
Organise plans and required activities of the treatment plants, monitor business-
related environmental contracts, and propose the Director for approval and
implementation;
Supervise land-renting investors on their contract to meet Environmental Protection
laws. Follow the International Organisation for Standardsation (ISO 14001:2004) at
the company;
Ultilise the available resources, apply technology creativities on the managements
of the treatment plants effectively;
Supervise the effluent quality standard to ensure the treated waste water from Nhon
Trach 3 meet all regulations before being released into the environments;
Cooperate with Technical – Infrastructure Departments to maintain the plant and
immediately repair any faults of the systems onsite;
103
Hold responsibilities over the contract with environmental consultants; wastes
treatments agencies, plant designers, drainage system supervisors and other
economical-technical- environmental customers;
Implements tasks from the Directors;
Follow Organisational Regulations and Activities to promote company business;
Implement operation plans and business developing activities as assigned by the
company directors;
Ultilise available resources, promote upgrades, apply scientific and technical
innovations during the plant operation phase;
Implement applied designs for the investors of company within Nhon Trach 3 IP;
Maintenance the infrastructures of the centralised waste water treatment plant;
Ultilise the assets, budgets of the company to continuously increase the efficiency
of the business;
Commit to provide and update information as requests by the company
5.5.1.2. Environmental Department Hierarchy
Figure 12: Environmental Department Hierarchy
5.5.2. CETP operation Team
5.5.2.1. Function and Task
(1). Function
To manage and monitor compliance with the environment regulations stipulated at
Decree No. 36/CP dated April 24, 1997 of the Government on “Regulation on
industrial parks, export processing zones and high-tech parks”. To advise the
corporation director on issues related to environment of Nhon Trach IP; to perform
Team leader
Env Consultants
Lab staffs
Supervisor
Operating Staffs
Maintenance
Staffs
104
activities of the treatment facilities and other related activities related to environment
in the industrial park.
To inspect, monitor, operate the system and take remedial measures of the station
and enterprises in Nhon Trach 3 IP prior transferring to the centralized treatment
system.
To treat wastewater of Nhon Trach 3 IP, Phase 2 in compliance with Vietnam
standards prior discharge into environment.
To manage, operate functions of the treatment facility effectively and efficiently. .
(2). Tasks
To perform the regulation on the Corporation organization and operation to promote
business;
To develop proper operation and business promotion plan, and submit to the
corporation director for approval and organize the implementation;
To exploit available resources effectively, R&D activities to improve the operation
efficiency;
To provide consulting services in designing, connecting, construction and
supervision for investors in Nhon Trach 3 IP, Phase 2;
To operate, maintain and repair the wastewater discharge infrastructure and
centralized treatment system properly;
To manage and develop the assigned fund effectively;
To be compliance with information and reporting policy of the company as well as
existing regulation;
To perform other assigned tasks.
5.5.2.2. Organization Structure of CETP operation Team
Figure 13: Organization Structure of CETP operation Team
5.6. MONITORING PROGRAM AND CONTROL OF WATER QUALITY OF
RECEIVING WATERS
The full monitoring program is under development and wil be subject to review and
approval by VEPF.
Site supervisor
01 người
Lab staff
01 person
Operating staffs
03 people
Maintenance staffs
01 person
105
5.6.1. Monitoring of the Centralized Wastewater Treatment Facility
The investor shall collect and analyze some pollution indicators at the treatment tanks
and record the data properly to evaluate the operation daily. The monitoring shall be
maintained properly.
Specifically as follows:
To monitor the wastewater volume at every storage tank prior pumping to the
centralized pipe to collect to the treatment system.
To monitor the wastewater volume prior treatment (at the balancing tank)
To monitor the sludge from the wastewater treatment system.
The mentioned tasks are performed daily.
5.6.2. Monitoring of Pre- and Post-Treated Wastewater Quality
Internal Check:
+ Are the wastewater treatment facility equipped with rapid metering and sampling
equipment to analyze pH, SS, COD and temperature? The monitoring data shall be
recorded as achieves to examine the treatment process.
+ Frequency: One in every day.
+ Install monitoring equipment to monitor basic indicators of the treated wastewater
quality.
Cooperate with competent agencies: The investor shall sign the contract with
competent environmental analysis agencies to collect sample and analysis.
Monitoring locations and indicators: 02 places
+ Pre-treated wastewater: pH, temperature, color, odor, COD, BOD5, TSS, total N,
total P, ammonia (by Nitrogen), phenol, cyanua, Cr (VI), Cr (III), Cd, Pb, Cu, Zn, Ni,
total Fe, Hg, As, Chloride pesticide, P-pesticide, mineral oil, vegetable oil, sulfur, and
Coliform (28 indicators)
+ Treated wastewater: pH, temperature, color, odor, COD, BOD5, TSS, total N, total
P, ammonia (by Nitrogen), phenol, cyanua, Cr (VI), Cr (III), Cd, Pb, Cu, Zn, Ni, total
Fe, Hg, As, Chloride pesticide, P-pesticide, mineral oil, vegetable oil, sulfur, Chloride
residue and Coliform (28 indicators)
Comparing standard: QCVN 40:2011/BTNMT, column B, Kq=1.1, Kf = 1.0.
Frequency: 4 times a year.
The analyzed results shall be compared to each other to evaluate the treatment
efficiency and take necessary adjustment properly.
(The analysis and periodical environmental monitoring of Nhon Trach 3 IP provide
data for local state management over environment adequately).
106
5.6.3. Monitoring of Water of Receiving Source at the Outlet
Monitoring locations: 2 places in Thi Vai River where receive wastewater of Nhon
Trach 3 IP.
Analyzing indicators: pH, DO, SS, COD, BOD5, N-NO2, N-NO3, coliform.
Comparing standard: QCVN 08:2008/BTNMT, column B2.
Frequency: Twice a year.
5.7. CAPACITY BUILDING
To build the capacity of the project, the owner will carry out these measures:
Workers working on-site will be frequently trained to deal with fire and explosions-
related situations
Train and assign tasks/ measures to mitigate the effect when the treatment plant
encounters failure. This situation would also can be avoided by frequent maintenance
and repairing of all equipments, machines onsite (the maintenance workers have to be
trained and skillful at the job)
Provide the workers all safety information about the plant. In the same time, the
company will cooperate with Work Safety Office and Dong Nai Department of
Labour- Invalids and Social Affairs to set up a safety guide for every step of the plant
operation and allow the workers to understand their own responsibilities of the site’s
safety.
A comprehensive training and capacity building program is outlined in the project’s
ESMF and will be implemented in the Nhon Trach 3 IZ. It has been reviewed by the
IZA and considered to be appropriate in scope for the needs of the IZ. During project
implementation the EMP will be further updated with specific training needs if these
are identified, above and beyond what will be covered in the standard program.
5.8. ESTIMATED COST AND TIME FOR IMPLEMENTATION OF EMP
5.8.1. EMP Budgets
Total budgets for the Environmental management Plan is presented I table below:
Table 41: EMP Budgets
No Items Costs Note
1. Construct the EMP report 71,000,000 Hire consultant
2. Monitoring process
2.1. During Construction 20,000,000 1 year
2.2. During Operation 36,000,000 1 year
107
5.8.2. EMP Schedule
The EMP schedule is listed in this table below
Table 42: EMP schedule
No Items Schedule
1. Construct the EMP May 2012
2. Carrying out the EMP Along with the construct of the treatment
plant
108
PUBLIC CONSULTATION
6.1. THE OBJECTIVE OF PUBLIC CONSULTATION
6.1.1. Toward Evaluation Authority
Based on the consulting from local authority and the public from the affected areas, it
will assist Evaluation Authority to have a more complete view over the project, and
make the process (of project evaluating) more efficient
6.1.2. Toward project owner
Receive feedback from local government and the public from the affected areas. From
there, provide realistic and effective mitigation proposals and assessments. In the same
time, hold up responsibilities to carry out mitigation to reduce long and short-term
negative impacts from the projects
Furthermore, create understandings between the project investor the affected public.
6.1.3. Toward consulting agencies
Receive feedback from local government and the public from affected areas. From
there, provide realistic and effective mitigation proposals and assessments.
6.1.4. Toward the People’s Committee and Fatherland Front Committee
Assist the authorised body to understand more on the projects through these points:
benefits from carrying out the Project, the environment impacts, and negative effects
mitigation methods.
This will create more understanding from local government toward the project
6.1.5. Towards the public from affected areas
Help the public to understand more on the projects through these points: benefits from
carrying out the Project, the environment impacts, and negative effects mitigation
methods.
This will create more understanding from the public; include acknowledging their
raise of concerns toward the project
109
6.2. PUBLIC CONSULTATION IMPLEMENTATION
The public consultant was conducted with the people committee and the fatherland
front committee of Long Tho commune. The contents are as follows:
The project scale and characteristics;
The project impacts on natural, socio-economic environments;
The adverse impact mitigation measures of the project and
Other issues if any.
Project owners have consulted these groups:
People Committee and fatherland Front Committee in Long Tho (project location)
The public, including residents lives nearby and will be affected by the projects
The planned activities are:
Toward People Committee and fatherland Front Committee in Long Tho, the
project owner has sent official dispatch toward these local governmental bodies. The
official dispatch is attached along with this report;
Towards the residents who live nearby and under effects of the project, the project
owners have sent a survey to take their opinions and feedbacks about the projects. The
surveys are also attached with this report
6.3. RESULTS OF PUBLIC CONSULTATION
6.3.1. Results from consulting the People’s Committee
6.3.1.1. On environmental and socio-economical negative impacts
Project “Construct a CETP with capacity 2,000 m3/day at Nhon Trach 3 IP –
Phase 2” at Long Tho Commune, Nhon Trach District, Dong Nai Province” will assist
the government on the quests of environmental protection, residential health
enhancements, therefore will be very essential in Dong Nai environmental protection
plan.
The People’s Committee of Long Tho Commune fully agree with points raised in
this EMP report over environmental and socio-economical issues
6.3.1.2. Project Environmental Impact Assessment
People’s Committee of Long Tho Commune has agreed with the environmental
impact mitigation plan proposed by the project.
6.3.1.3. Feedbacks toward project owner
Project owners need to pay special attention toward the environment protection
efforts during the construction and operation of the project
110
Need to frequently assess, maintain the wastewater treatment plants, and avoid
expected accidents that can affect the local environments and publics.
Need to provide safety equipments for working staffs onsite to ensure their health
and reduce risks when accidents occurred. This needed to be done in both
construction and operation phases.
6.3.2. Results from consulting the Fatherland Front Committee
6.3.2.1. On environmental and socio-economical negative impacts
Project “ Construct a CETP with capacity 2,000 m3/day at Nhon Trach 3 IP –
Phase 2” at Long Tho Commune, Nhon Trach District, Dong Nai Province” will assist
the government on the quests of environmental protection, residential health
enhancements, therefore will be very essential in Dong Nai environmental protection
plan.
The People’s Committee of Fatherland Front Commune fully agree with points
raised in this EMP report over environmental and socio-economical issues
6.3.2.2. Project Environmental Impact Assessment
People’s Committee of Long Tho Commune have agree with the environmental
impact mitigation plan proposed by the project
Need to provide safety equipments for working staffs onsite to ensure their health
and reduce risks when accidents occurred. This needed to be done in both
construction and operation phases.
6.3.2.3. Feedbacks toward project owner
Project owners have to follow legal regulations during both construction and
operation phase of this treatment plant.
Project owners have to carry out all environmental impact mitigation plan proposed
by the project
Project owners have to ensure order and security, and avoid conflicts between
workers from different provinces and local residents
6.3.3. Results of consultations with the public
The results of consultations with the public are summarized below:
111
Table 43 Public consultations
N
o Name
Gen
der
Birth
year Address Job
Water
sources
Is affected by the project
Agree on
the project
Other
opinions
Air
Quali
ty
Health Income Others
Response
1
Nguye
n Van
Bang
Mal
e 1969
Hamlet 2,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Fisherm
an Well No No No No Agree
The project
owner should
ensure treated
wastewater
meet national
regulation
Adequately
reflected in
EIA
2
Nguye
n Tan
Phuc
Mal
e 1956
Hamlet 3,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Aquacul
ture
worker
Well No No Well is
polluted No Agree
Treat the
wastewater and
reduce
pollution
Reflected in
project design
3 Le Anh
Tuan
Mal
e 1990
384/19
Hamlet 2,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Policem
an Well No No No No Agree
112
N
o Name
Gen
der
Birth
year Address Job
Water
sources
Is affected by the project
Agree on
the project
Other
opinions
Air
Quali
ty
Health Income Others
Response
4
Tran
Quoc
Hung
Mal
e 1964
Hamlet 2,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
No No
Pomelo
crop is
affected
by water
quality
No Disagree
Project owner
should
cooperate with
local
government to
monitor and
prevent solid
wastes and
wastewater to
enter the open
water
Reflected in
project design
5
Nguye
n Thi
Kim
Lien
Fem
ale 1969
877/1 Hamlet
2, Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Un-
contract
ed
worker
Well No No No No No opinion
The project
owner should
be careful with
the discharge
during rain, to
prevent flood
onto residential
houses near Lo
Ren
Design of
discharge and
drainage
system has
taken into
account
potential
flooding (see
also text below
table)
6 Nguye
n Thi
Fem
ale 1955
Hamlet 2,
Long Tho Worker Well No No No No Agree
113
N
o Name
Gen
der
Birth
year Address Job
Water
sources
Is affected by the project
Agree on
the project
Other
opinions
Air
Quali
ty
Health Income Others
Response
Lot Commune,
Nhon Trach
District, Dong
Nai Province,
Dong Nai
7
Huynh
Thi
Nam
Fem
ale 1967
859/6/7
Hamlet 2,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Workers Well No No No
Odours
from
wastewater
affects the
family
No opinion
Ensure the
treated
wastewater
meet the
standard and
won’t cause
offensive
odours
Reflected in
project design
8
Nguye
n Thi
Dien
Fem
ale 1950
815/34/2
Hamlet 2,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Un-
contract
ed
worker
Well
9
Nguye
n Thi
Luom
Fem
ale 1958
Hamlet 2,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Un-
contract
ed
worker
Well No No No No Agree
No Opinion
114
N
o Name
Gen
der
Birth
year Address Job
Water
sources
Is affected by the project
Agree on
the project
Other
opinions
Air
Quali
ty
Health Income Others
Response
10
Phan
Thi
Hong
Fem
ale 1971
Hamlet 2,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Un-
contract
ed
worker
Well No No No No Agree
The project
owner should
be careful with
the discharge
during rain, to
prevent flood
onto residential
houses near Lo
Ren
See above.
11
Phan
Thi
Loc
Fem
ale 1964
Hamlet 2,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Worker Well No No No No Agree
The project
owner should
be careful with
the discharge
to prevent
flood onto
residential
houses near Lo
Ren
See above.
12
Nguye
n Th
Luoc
Fem
ale 1968
Hamlet 2,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Un-
contract
ed
worker
Well No No No No Agree
No Opinion
115
N
o Name
Gen
der
Birth
year Address Job
Water
sources
Is affected by the project
Agree on
the project
Other
opinions
Air
Quali
ty
Health Income Others
Response
13
Tran
Thi
Thu
Mai
Fem
ale 1959
Hamlet 2,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Retailer Well No No No No No opinion
Please
excavate Lo
Ren frequently,
prevent
wastewater
stagnant,
causing flood
during rain
See above.
14
Tran
Ngoc
Thanh
Mal
e 1975
Hamlet 2,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Worker Well No No No No Agree
Ensure the
treated
wastewater
meet the
standard
Reflected in
project design
15
Phan
Thi
Nhung
Fem
ale 1989
Hamlet 3,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Worker Well No No No No Agree
No Opinion
16
Nguye
n Thi
Tuyet
Fem
ale 1958
861, Hamlet
2, Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Retailer Well No No No No No opinion
No Opinion
17 Nguye Fem 1989 Hamlet 3, Retailer Well No No Yes No Agree No Opinion
116
N
o Name
Gen
der
Birth
year Address Job
Water
sources
Is affected by the project
Agree on
the project
Other
opinions
Air
Quali
ty
Health Income Others
Response
n Thi
Nuu
ale Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
18
Le
Binh
Phuon
g Kim
Fem
ale 1977
808, Hamlet
2, Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Retailer Well Yes Yes No No Agree
Flood during
rain, The water
colour is dark
See above.
19
Doan
Bich
Nguye
n
Fem
ale 1961
Hamlet 2,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Retailer Well No No No No No opinion
The project
owner should
be careful with
the discharge
during rain, to
prevent flood
onto residential
houses near Lo
Ren
See above.
117
N
o Name
Gen
der
Birth
year Address Job
Water
sources
Is affected by the project
Agree on
the project
Other
opinions
Air
Quali
ty
Health Income Others
Response
20
Tran
Kim
Kieu
Fem
ale 1969
874, Hamlet
2, Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Retailer Well No No No No Agree
Before Lo Ren
discharge is
showed to be
darken,
however it
have stopped
recently
21
Huynh
Th
Nhieu
Fem
ale 1971
Hamlet 2,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Retailer Well No No No No Agree
No Opinion
22
Truong
Dinh
Huu
Mal
e 1964
Hamlet 3,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Worker Well No No No No Agree
No Opinion
23
Huynh
Van
Hoa
Mal
e 1959
877, Hamlet
2, Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Worker Well No No No No Agree
No Opinion
24 Le Van
Dao
Mal
e 1948
Hamlet 2,
Long Tho
Commune,
Nhon Trach
District, Dong
Nai Province
Retailer Well Yes Yes No No Agree
Ensure flow
from Lo ren
and reach the
main river
Reflected in
project design
118
Based on the survey as above, few key points can be summed up as below:
Most people agree with the construction of the CETP for Nhon Trach 3- Phase 2
(Module 2). Most of the others have no comments on the issues
Many residents faced the issues of flooding from the canal during rainfall, and
expected the project owners to have counter-measures for this problem
Project investors comments:
Currently the flooding issues at Long Tho Commune is caused by the discharge of
Nhon Trach 6 IP, Nhon Trach Clothing IP,and current Nhon Trach 3 especially during
high rainfall.
However, based on industrial parks planning, Nhon Trach 6 IP and Nhon Trach
Clothing IP discharges will soon going through the discharge road at Suoi Can Bridge
and Cai Sinh Canal, once the pipe network there constructed, hence relieve the
flowrate through Mareng Canal (and reduce the flood issues here). Currently, the Cai
Sinh Canal project have already been proposed by Nhon Trach People Committee and
Dong Nai Department of Infrastructure and Planning to Dong Nai People Committee
for fundings in fourth quarter of 2012, and start construction in early 2013.
6.4. INFORMATION DISCLOSURE
The Vietnamese version of the EIA was disclosed locally on July 16 2012 at Dong Nai
DONRE office, Dong Nai Industrial Zone Management Board Office, Division of
Natural Resources and Environment of Nhon Trach District; and Long Tho Commune
People's Committee. It was also disclosed at the Vietnam Development Information
Centre (VDIC) on July 17, 2012.
The English version was disclosed at VDIC on July 6 2012 and in the InfoShop on
May 2, 2012. The final versions will be disclosed at the completion of Project
appraisal.
6.5. COMMITTMENTS OF THE PROJECT OWNER
Project owners promised to follow all Vietnam regulation during the construction
and operation of the project, include:
+ Nearby air quality: Air emissions have to meet Vietnam regulations (QCVN
05:2009/BTNMT, QCVN 06:2009/BTNMT).
+ Noise: have to be below the regulated level allowed for residential areas (QCVN
26:2010/BTMNT).
+ Treated wastewater: reach Vietnam regulation QCVN 40:2011/BTNMT – National
regulation about industrial discharge, Column B, Kf=1.0, Kq=1.1.
+ Solid wastes: All domestic solid wastes will be contracted to be sorted and treated
appropriately.
+ Sludge: is dewatered, compressed and transported to appropriate site.
+ Hazardous wastes: Stores under covers, then hand to authorized agents to handle.
119
+ Hazardous and non hazardous wastes are collected, transported, and treated as
Decree 59/2007/ND-CP on solid wastes and Circular 12/2011/TT-BTNMT of
MONRE on hazardous wastes
Project owners promise will apply safety features to reduce risks and environmental
negative impacts as presented in the report, while strengthen the training of ground
staffs to ensure effective operation of the system
The project owner will take full responsible in front of Vietnam Law if violate
International Convention or Vietnam Regulation.