environmental monitoring reportthe two civil engineering contracts: xl01 design and construction of...
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Environmental Monitoring Report
Semestral Report July-December 2012
VIE: Song Bung 4 Hydropower Project
Prepared by Song Bung 4 Hydropower Project Management Board (SB4HPMB) for Vietnam
Electricity and the Asian Development Bank.
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Project head office: Song Bung 4 Hydropower Project Management Board No. 78 A Duy Tan street, Da Nang City Tel: +84 511 2488 811 Fax: +84 511 2621 535
SONG BUNG 4 HYDROPOWER PROJECT Loan No.: VIE 2429:
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Environmental Management Report
Semi-Annual Report July – December 2012 Loan VIE 2429: Song Bung 4 Hydropower Project For the ADB Prepared by Song Bung 4 Hydropower Project Management Board for the Vietnam Electricity and the Asian Development Bank.
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CURRENCY EQUIVALENTS (as of 31st December 2012) Currency unit – dong (D)
$1.00 = 20,820 VND
NOTE In this report, “$” refers to US dollars, “VND” refers to Vietnam Dong unless
otherwise stated
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ABBREVIATIONS
ADB Asian Development Bank
EVN Electricity of Viet Nam
BYT Ministry of Health
MONRE/BTNMT Ministry of Natural Resources and Environment
EVN Electricity of Vietnam
PMU Project Management Unit
NR Natural Reserve
IMA Independent Monitoring Agency
EMP Environmental Management Plan
KK Air
NM Surface Water
SH Domestic
NT Waste Water
QCVN Vietnam Regulation
TCVN Vietnam Standard
PMB Project Management Board
SB4 Song Bung 4
PPC People’s Committee
DPC District people committe
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TABLE OF CONTENTS
1. INTRODUCTION .......................................................................................................... 5
1.1. Project background .................................................................................................. 5 1.2 Project owner, consultants and contractors, stakeholders................................... 6 1.3. Objectives of EMP Monitoring................................................................................ 7
2. PROJECT IMPLEMENTATION................................................................................... 8 3. COMPLIANCE WITH EMP.......................................................................................... 8 4. MONITORING PROGRAM........................................................................................ 13
4.1. Introduction............................................................................................................ 13 4.2. Water quality monitoring....................................................................................... 13 4.3. Wastewater quality monitoring.............................................................................. 17 4.4. Air quality monitoring .......................................................................................... 21 4.5. Solid wastes ........................................................................................................... 26
5. Conservation offset programs....................................................................................... 27 5.1. Capacity building program .................................................................................... 27 5.2. Rehabilitation program .......................................................................................... 29 5.3. Reservoir clearance................................................................................................ 31
6. Total fund for environemtal management activities in 2012........................................ 32 7. Main activities related to environment management in the first six months of 2013... 33
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1. INTRODUCTION
1.1. Project background
Song Bung 4 Hydropower Project is part of the Vu Gia – Thu Bon
hydropower cascade approved by the Ministry of Industry by Decision
No.875/QD-KHDT dated 02/05/2003 and given priority for construction after A
Vuong and Song Tranh 2 project. The project is partially funded locally from
within Vietnam and partially by a loan from the Asian Development Bank (ADB).
Song Bung 4 Hydropower Project is located on Song Bung in the upper
part of the Vu Gia River in Nam Giang District, Quang Nam Province. The basin
area to the dam of Song Bung 4 is 1,477 km2, length of the main river is about
107km.
The headwork is located in the area of the Ta BHing and ZuoiH communes,
Nam Giang district, Quang Nam province. The coordinate of the proposed dam is
at 15o42’19” of the Northern latitude and 107o38’28” of the Eastern longitude. The
powerhouse is located at Ta BHing commune with the coordinate at 15o43’38” of
the Northern latitude and 107o38’58” of the Eastern longitude.
Figure 1. Project location
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Main milestone:
- Ground breaking : June 2010
- River closure : January 2012
- Impounding : June 2014
- Unit 1 Commissioning : September 2014
- Unit 2 Commissioning : October 2014
1.2 Project owner, consultants and contractors, stakeholders
- Project Owner: Song Bung 4 Hydro Power Project Management Board
(that represents for EVN to implement)
- Site Supervision Consultant: Mott Macdonald in association with
PECC4
- Civil Contractor: Sinohydro is the main contractor appointed for both of
the two civil engineering contracts: XL01 Design and construction of the
Headworks, XL02 Design and Construction of the Waterways
- Independent Environmental Monitoring: Social Consultant
Figure 2. Flowchart of Environmental management
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1.3. Objectives of EMP Monitoring
EMP monitoring is based on (i) approved EIA by MONRE in 2007,
(ii) approved EMP by ADB in 2010, (iii) Civil works contract of packages, (iv)
Vietnam Technical regulations and Law on Environment, (v) ADB’s
environmental safeguards. Objectives of EMP monitoring are as follows:
- Monitor the Project compliance with Vietnam Technical regulations and
Law on Environment, ADB’s Environmental safeguards, EMP, EIA;
- Monitor the compliance of Contractors during construction phase;
- Suggest measures to increase efficiency of minimizing negative impacts
on environment during construction phase;
- Determine and control new or potential environmental impacts (of any).
3.Annual Implementation Plan 2012
4. EMP Subprogram Plans Objective, activities, locations, responsible parties, budget,...
2.Environmental Management Plan Approved by ADB and DONRE
March 2010
Semi-annual Reports to DoNRE Compliance with DoNRE requirements
Mott MacDonald Non-compliance reports
Socioconsult reports
Contractor reports
Semi-annual Reports to ADB Compliance with EMP, Progress
Towards Expected Outcomes
Local authorities reports
4.1 Environmental Protection from Construction +
Inspection
4.4 Rehabilitation
for Song Thanh Natural Reserve
4.5 Community
Based Forestry Management
(Finished)
4.2 Monitoring programs (water, air quality,…)
4.3 Capacity Building Program
1.Environmental Impacts Assessment Approved by MONRE/ ADB
2007
SB4 PMB
4.6 Reservoir clearance
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2. PROJECT IMPLEMENTATION
There are 4 main packages in Song Bung 4 Project:
- Package XL-01: Preparation of Engineering and Construction Drawings
and Civil Works Construction of Headworks.
- Package XL-02: Preparation of Engineering and Construction Drawings
and Civil Works Construction of Waterways.
- Package TB-04: Supply, transportation, storage and preservation,
installation, pre-commissioning and commissioning of electro-mechanical
equipment.
- Package TB-05: Package 5 (TB-05) Supply, transportation, storage and
preservation, installation, pre-commissioning and commissioning of Hydro-
mechanical equipment
3. COMPLIANCE WITH EMP
Table 1. Mitigation measures in compliance with EMP
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Potential environmental impacts / Proposed mitigation measures mentioned in EMP
Compliance Implemented activities
Dust, noise and air quality reduction:
- Cover trucks
- Equip 1-2 water sparying trucks to spray water at leat 2 times/day
- Build washing station
- Pave, asphalt the road
- Ensure workers’ health
- Blasting activities
Partly complied
- Contractors has equipped 2 spraying trucks and spray at least 02 times/ day to reduce dust
- Add more watering equipment at crushing plant to reduce dust
- Some trucks are not covered during transportation
- Contractors have concreted some section in national road 14D to prevent dust, safety
- Workers are equipped PPE, air quality in tunnel is monitored everyday to ensure the working conditions, air ventilation is open during working times;
- Quantity of dynamite, time of blasting, warning sign,… are under control to ensure safety.
Wastes from domestic use:
- Dustbins, toilets will be installed in camps and construction areas
- Landfill will be constructed for domestic waste and daily covered by soil to reduce bad smell and insect activities
Construction wastes:
Set up disposal areas for construction wastes and operate them as method statement
Hazardous wastes:
Collect, store and ask for a firm accredited by government to handle.
Partly complied
- Dustbins are installed in camps, construction areas
- PECC4/ MM and SB4 PMB remind Contractors many times to cover the landfill everyday.
- Disposal area No.01 (one of four) is not operated correctly, ex. Do not cover the layer of rock around the disposal areas to prevent erosion, rain-water drainage channels as mentioned in approved method statement
- Contractor build stable areas to store oil, battery, ... and has signed contract with Green Company to treat hazardous waste. Until now, the Green company transported some wastes one time in May 2012.
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Potential environmental impacts / Proposed mitigation measures mentioned in EMP
Compliance Implemented activities
Construction wastewater
- Arranging mud-deposit tank at the rock crush station areas, concrete-factories
- Arranging oil traps
Domestic water waste
Domestic wastewater of workers will be collected and treated by septic tanks
Partly complied
- Contractors arrange settling tank for construction wastewater at concrete mixing area, adit 1 &2 for water from the tunnel, at crushing plant; oil traps to separate oil in rain-water that flow over the rock quarry
- Contractors build toilets at camps, mobile toilet at construction sites. However, these do not operate effectively due to some parameters in water still exceed standard after being treated to discharge into environment ( see more in section 4 for detail))
Reduction of Bung water quality, water courses nearby:
River pollution cause by waste, harmful waste and solid erosion will be minimized.
Mining for mineral at upstream will be monitored and controlled by forest guard.
Monitoring the quality of the river regularly
Partly complied
- Arrange sedimentation tank to settle construction wastewater before discharging;
- Monitoring water quality of Bung river to determine the trend of quality change;
Safety on site
Complied - Workers have been equipped with PPE including boots, ear defend, hard hat, mask,…
- Arrange worker to collect spoil rock on road and ensure traffic
- Contractor concreted a part of National road 14D to reduce dust, noise. Also, SB4 transferred fund to Transportation Department of Quang Nam to concrete, repair, maintain this road. In 2012, SB4 transferred 04
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Potential environmental impacts / Proposed mitigation measures mentioned in EMP
Compliance Implemented activities
billion VND.
Impact on soil environment and vegetation:
- Erosion and loss of top sod: removing the sod before construction activities and restoring after construction.
- Solid pollution: collecting oil at oil storage, reparing area, parking area,... These areas will be consolidated by waterproof and drain around
- Restore damp site and other roadwork zones: Much of the area in the vicinity is grassy and vulnerable to erosion and slippage due to construction activities of vegetation clearing, scalling, driving of heavy vehicles, blasting, etc.
- Storage area, repairing area, parking area have roof, concrete floor, drainage surrounding to collect oil leakage
- Slope protection in disposal areas by operating in accordance with approved method statement and plant trees to prevent erosion, protect river banks along Bung river by prohibiting worker to cut down trees illegally,…
- Planting trees in workers’ camps, along the roads to office; arranging rubbish in camps and collect, treat daily;
- Right now, illegal gold mining activities have happened on Bung river and near SB4 project construction areas. Hence, this will reduce the water quality of Bung river, cause erosion along the river banks. Local agencies have chased the illegal miners may times but it might have not any improvement.
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Potential environmental impacts / Proposed mitigation measures mentioned in EMP
Compliance Implemented activities
Biological impacts:
- Construction activities will require removal of trees; Building (access roads) and improvement (highway) of roads, and transmission lines in relation to the Song Bung 4 HPP will increase access to the forested areas in the vicinity and potentially increase illegal logging,
- The temporary increase in workers to the construction site will increase the potential for illegal fuel wood and non timber forest product collection and hunting. Mitigation measures will include (a) Disseminating widely the regulation of forest protection and hunting forbiddance; (b) provision of environmental training on environmental management issues, (c) environmental protection by guards, capacity building of forest rangers, and imposing fines for illegal activities, and (d) community awareness campaign.
- Vegetation will also be lost in the STNR, other areas and might affect local people. Instead of paying for each tree lost, the Project will support a conservation off-set program, including: community based forest management plan, rehabilitation plan, capacity building program, …
Complied
- At the entrance of Project site, SB4 supported District Police to build a police station and finished in 2011. This will help to prevent illegal exploiting wood at site.
- Site labors have been trained not using products from wild animals, not cutting down tree outside of project boundary, not using wood for fuel but using gas,… These issues have been inspected frequently, continuously by MM/PECC4. According to report from Independent Environmental Monitoring Agency, the local forest control have no findings on illegal hunting from SB4 site’s workers;
- The Community-based forest management program is finished in 2011, complies with EMP. This program helps affected people to access and profit non-timber forest products.
- Capacity building for Song Thanh NR to prevent illegal hunting and access to forest when there are construction activities and reservoir; (see more section 4 for detail)
- Rehabilitation plan for the areas affected by construction activities has been implemented (see more section 4 for detail)
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4. MONITORING PROGRAM
4.1. Introduction There are many parties carry out monitoring weekly, monthly, quarterly:
(i) The McDonald/PECC4 – acting as supervising consultant- carry out regular inspection at site and generate report on the EMP compliance to Contractor, SB4 PMB; including toxic gas, noise, dust, sanitation condition, erosion, siltation,…;
(ii) The Contractor carry out monitoring monthly as mentioned in EMP and apply mitigation measures
(iii) The Socio Consultant- acting as independent agency- conduct monitoring period every 03 months (surface water, wastewater, ecology, air, domestic water, safety,…)
(iv) SB4 PMB- acting as Project owner- receive all the relevant information, conduct inspection at least once a month with McDonald/PECC4, Contractors…
In the last semi-annual of 2012, the Contractor has been retained a mount of money (about ~ 2 billion VND) for the repeated non-conformance including: dust due to lack of watering frequency, poor sanitary hygiene at workers’ camps, truck overloading, erosion at disposal area No.02,….
4.2. Water quality monitoring
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Figure 3. Sampling station for surface water quality
Note: NM1: sampling location before construction area (on Bung river) NM2: sampling location after construction area (on Bung river)
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Table 2. Surface water quality
Results from SocioConsult (IMA) Results from Contractor
July October July August September November No Content Unit
NM1 NM2 NM1 NM2 NM1 NM2 NM1 NM2 NM1 NM2 NM1 NM2
QCVN 08: 2008/ BTNMT
(A2)
1 pH - 7,1 7,6 6,9 6,8 7,3 7,2 7,2 7,4 7,2 7,4 7,1 7,1 6 – 8,5
2 DO mg/l 5,9 5,6 6,2 6,3 5,25 5,4 5,48 5,42 5,4 5,42 5,54 5,42 >=5
3 TSS mg/l 1733 1087 373 568 475 356 590 580 2175 580 244 102 <=30
4 BOD5 mg/l 3 4 7 10 3 3 20 10 20 10 3 3 <=6
5 COD mg/l 8 10 16 22 7 7 43 25 43 25 6 6 <=15
6 NO3
- - N mg/l 2,4 3,2 3,8 4,2 2,4 2,8 2,8 2,4 3,8 2,4 2,8 2,6 <=5
7 NH4
+ - N mg/l 1,5 1,8 1,01 1,41 1,26 1,3 1,18 1,1 0,25 1,1 1,5 0,61 <=0,2
8 Total oil mg/l Not detected
Not detected
Not detected
Not detected
Not detected
Not detected
Not detected
Not detected
Not detected
Not detected
No detected
No detected <=0,02
9 Coliforms
MPN/ 100ml 1200 2300 270 340 3600 2900 1200 7500 400 7500 14000 9000 <=5000
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D4.2.1. Diagram of dissolved oxygen in surface water
Dissolved oxygen
0
1
2
3
4
5
6
7
July August Sept Oct NovTime
mg
/L
Before construction area
After cons. Area
QCVN (>5)
D4.2.2. Diagram of Total suspended solid
TSS
0
500
1000
1500
2000
2500
July(contractor) July(IMA) Aug Sept Oct(IMA) NovTime
mg
/L
Before construction area
After cons. Area
QCVN
D4.2.3. Diagram of Coliform
Coliform
0
2000
4000
6000
8000
10000
12000
14000
16000
July(contractor) July(IMA) Aug Sept Oct(IMA) Nov
Time
MP
N/1
00m
L
Before construction area
After cons. Area
QCVN
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These are the results from random samples at the monitoring period. The coliform, BOD5, Nitrogen, TSS parameters increase from upstream to downstream of construction area. However only TSS, coliform parameters exceed the allowed limit, the others are under allowed limits. This reflects the impacts of construction activities on Bung river quality: - Resettlement ponds at RCC batching plant, at adit 1, adit 2 are not cleared very often; - The inefficient wastewater treatment plants (septic tanks) in workers’ camps;
However this water source is not used for domestic use in construction site and for local people in radius of 15 km downstream of the powerhouse. The site workers and local people use the upper streams for their domestic use. Among the above parameters, Nitrogen is the agent that causes eutrophication/ nutrient loading to receiving body of water. However, the eutrophication usually occurs in static water sources (lake, reservoir). In this case, receiving body is Bung river with continuous flow, hence eutrophication will not occur.
4.3. Wastewater quality monitoring - At the camp areas at site, contractors built septic tank to treat the
wastewater from toilets, bathroom, kitchen,.. before discharge into the environment.
- Waste water from the machinery and vehicle repair activity has been collected.
- Vehicle repair area has been provided with roof and wastewater collection gutter.
- Wastewater from construction activities (adit 1, adit2, RCC batching plant, …) are collected and settled by ponds before discharge into environment.
Picture 4.1. Septic tank at camps and settling pond for wastewater from RCC batching
plant
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Figure 3. Sampling station for wastewater quality
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Table 3. Wastewater quality monitoring results
Results from Socioconsult (IMA) Results from Contractor
July October June September No Parameter Unit
NT1 NT2 NT3b NT1 NT2 NT3b NT1 NT2 NT3b NT2 NT3b
QCVN 14/BTNMT, Column B, II
1 pH - 7,3 7,5 7,6 6,6 6,8 6,8 6,6 6,5 6,4 7,3 7,2 2 TSS mg/l 40 36 40 35 50 36 15 19 26 36 195 <=100 3 BOD5 mg/l 26 65 98 40 156 20 12 38 98 22 386 <=50 4 NO3
- - N mg/l 2,8 2,6 2,3 5,4 7,6 3,8 3,6 4,3 7,4 2,8 3,4 <=50
5 NH4+ - N mg/l 6,5 29 26,5 2 89 18 2,64 9,4 32 0,5 1,75 <=10
6 PO43- - P
mg/l 0,12 0,87 0,81 0,12 0,92 0,32 0,67 0,011 0,34 0,22 0,08 <=10
7 Total oil mg/l 0,2 0,2 0,4 0,4 0,6 0,4 1,68 1,22 3,6 1,16 2,82 <=20
8 Coliforms MPN/ 100ml 9300 12000 12000 150 290 93 2300 93000 420000 2800 110000 <=5000
Note: NT1: Main camps of contractor NT2: Camp No.45 on the right abutment NT3b: Camp on the left abutment
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D4.3.1. Diagram of TSS in wastewater quality
TSS
0
50
100
150
200
250
June July September OctoberMonth
mg/L
Main campCamp 45Camp on left abutmentQCVN 14/BTNMT
D4.3.2. Diagram of N-NO3 in wastewater quality
N-NO3-
0
10
20
30
40
50
60
June July September OctoberMonth
mg/L
Main camp
camp 45
camp on left abutment
Standard
D4.3.3. Diagram of P-PO4 in wastewater quality
P-PO4
0
2
4
6
8
10
12
June July September OctoberMonth
Mg
/L
Main camp
camp 45
camp on left abutment
QCVN 14/BTNMT
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From the monitoring results, the quality of wastewater before discharging
into environment has been improved to comply with Vietnam standards. Among
the parameters BOD5, ammonia nitrogen, coliform, the ammonia can cause
eutrophication for receiving body water. However, the receiving body water is
streams with continuous flow; hence the eutrophication will never happen.
(eutrophication will usually happen in static water course such as lake, pond,…)
4.4. Air quality monitoring (i) Noise, dust, vibration
- Operation of rock crushing and screening stations and concrete mixing stations cause concentrated dust.
Picture 4.2. Cover the aggregation area at the rock crushing plant and cover the
conveyor at RCC batching plant to reduce dust
- Vehicles traveling on road, blasting cause distributed dust. Mitigation
measures are spraying water onto the road, at least 4 times/ day; cover the trucks
transporting materials.
- The responsibilities to maintain this road are agencies using this road. Currently, Quang Nam Department of Traffic (DOT) is the main agency to implement this responsibilities with the fund contribution from agencies using this road (Song Bung 2, Song Bung 4, Xekaman,….) and fund from government. Until now, Song Bung 4 PMB transferred 05 billion VND/ total of 12 billion VND to DOT to maintain this road. Also, contractor Sinohydro have maintained some parts of this road (concereting) and sprayed water to reduce dust that might affect the locals during their material transportation from rock quarry to project site.
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Picture 4.3. Cover vehicles transporting materials, spraying water on National road 14D (ii) Toxic gas
Dust, CO, NOx, SO2, wind speed is monitored daily by staff of Heath and safety department from Contractor in the tunnel. CO is considered the toxic gas and can cause lethal. However, the concentration of CO is under the allowable value; hence this will not affect the workers’ health. Workers are provided personal protective equipment (boots, glass, button noise, mask, hard hat,…) and they have to wear during their working time.
Contractor used ventilating devices to supply clean air continuously into tunnel
area and push out toxic emissions.
Picture 4.4. Air ventilation in tunnel (adit)
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Figure 4. Sampling locations for air quality
Table 4. Air monitoring results from SocioConsultant (IMA)
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July October
No Parameters Unit
KK1a KK2 KK3a KK4 KK5b KK1a KK2 KK3a KK4 KK5b
QCVN 05:2009 /BTNMT
(average1h)
QCVN 26:2010/
BTNMT , and QCVN
27:2010 /BTNMT
1 ðộ ồn L50 dBA 70,2 76,3 91,2 61,5 65,8 69,5 67,5 87,2 60,8 80,6 <=70
2 ðộ rung m/s2 0,022 0,169 0,212 0,01 0,021 0,019 0,022 0,045 0,007 0,024 - <=0,055 3 TSP mg/m3 0,15 0,42 0,29 - - 0,06 0,13 3,62 <=0,3 -
4 CO mg/m3 2 4 3 - - 2 3 7 <=30 -
5 NOx mg/m3 0,08 0,1 0,08 - - 0,026 0,038 0,153 <=0,2 -
6 SO2 mg/m3 0,017 0,021 0,02 - - 0,016 0,023 0,076 <=0,35 - Note:
KK1a: Air sample in the construction area of waterway-right abutment
KK2: Air sample in rock quarry – rock crushing plants
KK3a: Air sample in sub-tunnel 2 – 20m from the tunnel head
KK4: Noise sample in Vinh village –Ta Poo commune
KK5b: Noise sample in concrete mixing plant
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Table5. Toxic gas monitoring results in the tunnel Parameter/ allowable limits (ppm)
SO2 CO NO2 O2 CH4 H2S Date Position (in the tunnel) 20 100 5 19,5-23,5 50 20
July, 2012 3-Jul G3 0 0 0 21,3 0 0 G4 0 0 0 21,2 0 0 12-Jul G3 0 0 0,5 21,2 0 0 G4 0 0 0 21 0 0 17-Jul G3 0 0 0 21,3 0 0 G4 0 13 3,2 22 0 0 24-Jul G3 0 0 0 21 0 0 G4 0 0 0 21,1 0 0 August, 2012 1-Aug G3 0 1 0,6 20,9 0 0 G4 0 0 0 21,3 0 0 8-Aug G3 0 0 0,5 22,3 0 0 G4 0 0 0 22,3 0 0
15-
Aug G3 0 0 0 21,6 0 0 G4 0 0 0 22 0 0
23-
Aug G3 0 0 0 21 0 0 G4 0 0 0 21,1 0 0
29-
Aug G3 0 0 0 21,2 0 0 G4 0 4 5,1 21,2 0 0 September, 2012 5 0 0 0,8 21 0 0 15 0 8 0,8 21 0 0 21 0 0 0 21,3 0 0 25 0 8,5 0 21,1 0 0 October 2 0 9 1,3 21 0 0 12 0 0 0 21 0 0 15 0 0 0 21,2 0 0 25 0 2 1,7 21,4 0 0
The monitoring results in tunnel show that there have been toxic gas (CO) in the tunnel, but the value is under the allowable limits. Workers are forced to use personal protection equipment to protect the health and ensure the safety.
Picture 4.5. Monitoring toxic gas in the tunnel.
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4.5. Solid wastes (i) Solid wastes from construction activities
Solid construction waste generated in the construction site includes: building materials, rubble and soil were collected in disposal sites along construction roads. Currently, the transportation of refuse soil and rubble has been decreased. It was mainly the transportation of surface soil in rock quarry to the waste disposal no.1. At the disposal areas, mitigation measures are plied to prevent land slide, soil erosion, such as: there are layers of rock on the bottom of the disposal areas, there are layers of rock to cover the slope of disposal areas, water drainage system to collect rain-water, …
Picture 4.6. Slope protection in disposal areas (ii) Domestic solid wastes
Domestic solid waste of the offices, camps and kitchen was collected into 15 mobile waste bins (150 liters) which were placed around the main camp area and 01 large mental bin-about 12 m3 was used to collect waste before they was buried in the waste disposal.
Picture 4.7. Cleaners collect domestic waste into large bin and cover soil
on the waste disposal area daily
11/2012 11/2012
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c. Hazardous solid waste Hazardous waste containing and generating area in the construction site
includes material storage areas, waste disposal sites and vehicle gathering and repair area.
The composition of hazardous waste generated in the construction area was mainly waste oil from the oil change of vehicles and machines; and clouts that contain lubricant. Contractor SinoHydro has signed contract with Viet Xanh Environmental Limited Company (Contract Number 2/5-2012 – Hð/CN dated 01 May, 2012) whose has license accredited by government for transporting, storage and treating the hazardous wastes. Hazardous wastes will be collected, transported and treated under the contract including: (1) Waste hydraulic oil; (2) lubricant clouts; (3) unused battery; Collection frequency will be based on the request of the construction site. Also, at oil supplement areas and hazardous wastes will be put/ stored at site in accordance with Vietnam regulation: concrete floor, roof, drainage with collection pit to collect water and leaked oil. The leaked oil will be absorbed into the clout.
In 2012, Viet Xanh Environmental Limited Company collected and treated the hazardous solid waste one time in May, including: 1500 liters of waste oil; 22 batteries and 15kg clouts with lubricant.
Picture 4.8. Transport& treat hazardous wastes and oil storage area at project site
5. Conservation offset programs
5.1. Capacity building program
* Objective:
Inundating reservoir and building road for flood avoidance of the Song Bung 4 project will increase access to the Song Thanh Nature Reserve, from that increase activities such as illegal timber logging and hunt, water quality decrease, excessive forest products logging and change of forest use.
As a result of the inundation, creating access by water in Tra Vinh (Vinh stream), Dak Pring and Bung rivers will be created in Ta Bhing and Zuoih communes. Since access into the forests will be easier by boat, hunters and loggers
28
in the area may be tempted to gain access to the forest products of both Song Thanh Nature Reserve and watershed areas (Dak Pring river, forest near the dam site). The dam and low river stretch will make it difficult for the transport of timber to downstream as is often done at present. However, forest products may be removed from the forests first by using the waterway before transferring to the road for transport. Hence, the capacity program for Song Thanh NR with equipment supplying and building guards post is useful and necessary.
* Implementation mechanism and estimates
There has been an agreement between STNR and SB4 about the implementation mechanism, as steps below:
Step1: STNR would prepare all design document of guards post, boat based on their own demands, serving to patrol and send to SB4 PMB for review;
Step 2: After reviewing, SB4 will submit to EVN for approval of mechanism implementation and cost estimation;
Step 3: SB4 will transfer money to STNR according to their request which is based on the implementation progress. STNR will implement the works by themselves (such as: sign contract with contractor to build guard post, select the boat supplier,…) When STNR finish all their works, they inform SB4 to witness and send all related documents to SB4 to strike as balance accordingly to regulation. It is expected that STNR will finish the works in Quarter 2/2013.
Table 6. Cost estimate for the program
Item Cost (VND) Source of fund Implementing agency
Building guards post
697.000.000
Purchasing boat 395.000.000
Contigency 105.000.000
Total cost 1.197.000.000
SB4 PMB STNR
Table 7. The implementation progress in 2012
2012 Activities
Q1 Q2 Q3 Q4
STNR prepare technical design and estimates to build the guards
post, purchase boat
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2012 Activities
Q1 Q2 Q3 Q4
SB4 send to EVN for approval the program
STNR adjust the design documents based on contents of EVN’s
approval Decision
STNR send all required documents to SB4, including: design
documents for guards post, quotations for boat purchasing
SB4 transfer money to STNR to implement in November 2012
(~ 548.707.000 VND). STNR begin to build guards post and
order the boat. It is expected that STNR will finish the works in
Quarter 2/2013.
Conclusion:
The implementation progress of the program is a bit later than committment in EMP. Although, Forest guards have continously monitored illegal activities full time throughout construction. At the entrance of the construction site of main civil works, SB4 built a guard post ( starting from April 2011 and finishing in June 2011) for Police of Nam Giang District to patrol at the construction site. Besides, SB4 PMB conduct monthly meeting with Police of Nam Giang District, Police of Quang Nam Province to inform the security at site to have actions accordingly. Also, SB4 had official letter to District Police, Provincial Police to reflect security at site in time, such as illegal mining affect Bung river quality and cause erosion along the river bank, illegal hunters/ loggers, ...
5.2. Rehabilitation program * Objective: The implementation of rehabilitation plan will enhance forest quality and
soil conservation through plant and enriching forests, and thus increase watershed protection. The rehabilitation plan for STNR is a part of the afforestation and rehabilitation for areas that are affected by Song Bung 4 HPP. Some of these total areas will be planted in areas that have been transferred to affected communities in the Community based forest management. So that they can have benefits from forest (non-timber forest products, …)
* Total afforestation areas (according to Decision No. 2334 dated 26 July 2010 on Approval on Afforestation Plan replacement for Forest areas to be transferred by purpose serving for Song Bung 4 hydropower project)
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Table 8. Estimated areas for afforestation
Items Areas (ha) Note
Special-use afforestation 128.5(*) These areas are of STNR
Protective afforestation 141.5
Productive afforestation 182.9
Note: (*) : the areas is estimated, and will be exacted after Quang Nam PPC issue the decision on land acquisition.
* Fund/ source:
- Total cost for the rehabilitation plan is 15.6 billion VND (according to Decision No.2334); EVN/SB4 will transfer the total cost to Afforestation Management Unit. However, in facts, the total cost for this program has been changed due to:
+ The location of production forest is changed in compared with the approved original (the new location is further than the expected original) so the cost is increased. Currently, related parties are under surveying the new location and then preparation of Detail design documents for these areas submission to Quang Nam PPC for approval. Hence, the special-use forest areas and protection forest areas will be implemented first.
+ Price escalation.
- On 09/5/2012, Nam Giang DPC, Afforestation Management Unit and PMB held the meeting about the price escalation and the change of location for productive forest areas. Based on this, there was an agreement that PMB will transfer fund for the supplement cost due to change of location and price escalation; PMB shall transfer the whole cost to Afforestation PMB after Technical Design approval by Quang Nam PPC. This total cost shall be higher than those indicated in Plan approved in Jul 2010.
- The latest cost that has been approved by Quang Nam PPC for special –use forest areas (consist of 128.5ha under Song Thanh NR), protection forest (consist of 141.5ha) is 20.3 billion VND in Decision No.517/Qð-SNN&PTNT of Quang Nam DARD. Howeer, the afforestation for special-use in STNR is pending the decision of land acquisition from Quang Nam PPC ( the area is less than 128,5 ha).
- Total transferred cost has been transferred to RMB (for 02 times) is 5.2 billion VND to replant the protection forest.
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The implmentation progress is later than plan. Until end of 2012, RMB has been in preparation stage for site work (select contractor, ...) and no hectare has been replanted.
5.3. Reservoir clearance The project will create a reservoir with an area of about 16 km2 and store a
total volume of water of 493 million m3 at the Normal Water Level (NWL) of El. 222.5 m. Thus, the botanical carpet will be inundated by the reservoir.
According to the general progress of the project, filling the reservoir will be inundated in June 2014. Before reservoir inundation, the reservoir must be cleared, trees must be cut down in order to mitigate eutrophication and water pollution.
The reservoir clearance plan is urgently prepared to meet the general progress of the project. The progress until the end of 2012 is shown in the Table 9 .below:
Table 9. Miles stone for main activities
2012 Activities
Q1 Q2 Q3 Q4
Implementation
agency Note
-Prepare the reservoir
clearance plan and send to
SB4 for comments
- SB4 finalize the clearance
plan and ñen to DONRE for
review
-Consultant:
PECC3
-SB4/EVN
Fund for PECC3 to
prepare the plan is
412,000,000 VND
(approved by EVN)
The final plan has been sent to Quang Nam DONRE to get the no-objection letter about technical specifications. Then, the DONRE has sent the letter to MONRE to ask for comments in 18th December 2012, due to the EIA was approved by MONRE. However, until the end of December 2012, there has no reply from these agencies for final revision/comments.
After getting the no-objection from MONRE, DONRE, the plan will be sent to EVN for approval (fund and technical specifications) before SB4 PMB issue bidding documents to select qualified Contractor. The clearance activities are expected to be done from June 2013 to May 2014, before filling reservoir in June 2014.
- According to EIA approved by MONRE in 2007, 60% of the total biomass volume will be cleared (it means 40% of the total biomass in reservoir will be allowed to retain). The volume of retained biomass will degraded but must ensure the concentration of Dissolved oxxygen (DO) in the reservoir > 6 mg/L in accordance with Vietnam standard QCVN 08:2008/BTNMT of the surface water.
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In SB4 project, the DO in water course after reservoir filling is 6.324 mg/L. (>6mg/L)
- 03 components need to be cleared in the reservoir, including:
+ Biomass: trees consist of roots, trunks, leaves. Nam Giang DPC will collect all valuable cut trees. Then, the rest of biomass will be burned 2 times to ensure the efficiency of burning.
+ Graves will be loaded, collected and buried in the cemetery;
+ Residential areas: houses, cattle housings, crops,...
Table 10. Volume of components cleared in the resevoir
No. Content Unit Volume Note
1 Biomass ton 67 026 This volume is equal to 60% of the total biomass in the reservoir (according to EIA approved by MONRE in 2007)
2 Graves 1 585 Loading, moving to cemetery
3 Residential areas
Houses, crops, cattle housing, public house,...
- Areas of local people
M2 62 427
- Public areas M2 15 156
6. Total fund for environemtal management activities in 2012
Table 11. Fund for environmental management in 2012
No Content Fund (VND) Note 1 Conservation off-set program 4,200,000,000 2 Environemtal monitoring (IMA) 400,000,000 3 Capacity building for STNR 548,000,000 4 Reservoir clearance 420,000,000 Total 5,568,000,000
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7. Main activities related to environment management in the first six months of 2013
- Environmental monitoring, inspection: Conduct inspection the mitigation measures in construction sites, conduct termly environmental monitoring (every 03 months by IMA); ...
- Conservation off-set: Cooperate and push with Afforestation Management Unit to implement the replanting activities.
- Capacity building for STNR: cooperate with STNR to implement in accordance with requirements in EIA.
- Reservoir clearance: cooperate, make clear the comments from MONRE, Quang Nam DONRE to get the no-objection for the technical specifications/ design . Then send to EVN for approval (technical design, fund) before issuing the bidding documents. The clearing activities are expected to implement in Quarter 3/2013.
- The fund for environmental management activities in 2013 is estimated below:
Table 12. Cost estimate in 2013
No Content Fund (VND) Note 1 Conservation off-set program 2,900,000,000 2 Environemtal monitoring (IMA) 400,000,000 3 Capacity building for STNR 548,000,000 4 Reservoir clearance 5,000,000,000 Total 8,848,000,000