environmental monitoring report · adb section bi annual report 2008 2nd half environmental impact...

Environmental Monitoring Report

Project Number: 26522 April 2009

Sri Lanka : Southern Transport Development Project ADB Section Bi Annual Report – July to December 2008

Prepared by FINNROAD

In association with Surath Wickramasinghe Associates

Colombo, Sri Lanka

For Road Development Authority Ministry of Highways, Sri Lanka

This re port has been submitted to ADB by the Ministry of Highways and is made publicly available in cordance with ADB’s public communications policy (2005). It does not necessarily reflect the views of

ADB.

ac

ADB Section

Bi Annual Report 2008 2nd Half Environmental Impact Monitoring - Page│1

ENVIRONMENTAL IMPACT MONITORING

ADB Funded Section Southern Transport Development Project

Sri Lanka

July to December 2008 Bi Annual Report

FINNROAD With Surath Wikramasinghe Associate Management Consultant of STDP

ADB Section

Bi Annual Report 2008 2nd Half Environmental Impact Monitoring - Page│I

Table of Contents

Executive Summary V

1. Reporting Period 1 2. Construction Activities during the Reporting Period 1 3. Environmental Impacts Monitoring and Mitigation Measures 3

3.1 Hydrology 4 3.1.1 Monitoring Methodology 6 3.1.2 Mitigation Measures to be adopted 6

3.2 Surface and Ground Water 7 3.2.1. Monitoring Methodology 8 3.2.2. Equipment and calibration Detail 9 3.2.3. Regulatory Standards 10 3.2.4. Mitigation Measures to be adopted 11 3.3 Air Quality 12 3.3.1. Monitoring Methodology 13

3.3.2. Equipment and calibration Detail 13 3.3.3. Regulatory Standards 13 3.3.4. Mitigation Measures to be adopted 14

3.4 Noise and Ground Vibration 14 3.4.1. Monitoring Methodology 15 3.4.2. Equipment and calibration Detail 15

3.4.3. Regulatory Standards 15 3.4.4. Mitigation Measures to be adopted 16

3.5Exploitation and Storage of Construction Material 17 3.5.1. Monitoring Methodology 17 3.5.2. Mitigation Measures to be adopted 18 3.6 Natural Environment 18 3.6.1 Monitoring Methodology 18

4. Results of Environmental Monitoring 20 4.1. Hydrology and Drainage aspect 20 4.2. Surface and Ground Water Quality 30 4.3. Air Quality Monitoring 40 4.4. Noise /Vibration Monitoring 42 4.5 Exploitation Handling, transportation and Storage of Construction Materials 47 5. Status of Environmental Licenses and Permits 48 6. Public Complain 50 7. Social Impact 51 8. Conclusion 53

ADB Section

Bi Annual Report 2008 2nd Half Environmental Impact Monitoring - Page│II

List of Tables

Table 01 Environmental parameters monitored 03 Table 02 Locations of water level monitoring-August 2005-2006 05 Table 03 Location of Ground water level monitoring-New 06 Table 04 Location of Ground water quality monitoring 08 Table 05 Location of Surface water quality monitoring 09 Table 06 Surface water quality monitoring parameters 09 Table 07 Base Line Data for Ground Water Quality Measurements Location 10 Table 08 Base Line Data for Surface Water Quality Measurements Location 10 Table 09 General Standards for Discharge of Effluents into Inland Surface Waters 11 Table 10 National standard for the ambient air quality 13 Table 11 Noise/Vibration Monitoring Parameters 15 Table 12 Maximum permissible noise levels for the construction activities 16 Table 13 Maximum permissible noise levels for prescribed activities 16 Table 14 Maximum Permissible Vibration Level 17 Table 15 Erosion control Work progress 21 Table 16 Hydrology and Drainage Activities 23 Table 17 Detail of the Flood Issues 27 Table 18 Flood Mitigation Activities 28 Table 19 Ground Water Levels –New Locations 28 Table 20 Locations of Affected Houses 30 Table 21 surface Water Quality Analysis 31 Table 22 Water Quality Monitoring Location Due to Public Compliant 37 Table 23 Water Quality Results at Locations Due to Public Compliant 37 Table 24 Locations of Surface & ground water quality measurement

around unsuitable dumping site Thalpe 38 Table 25 Ground water Quality at Thalpe Site 38 Table 26 Surface water quality at Thalpe Site 38 Table 27 Results of the Ground Water Quality 39 Table 28 Water Quality Results of Waste water discharged at motor Pool 40 Table 29 SPM Measurement Results 40 Table 30 Ambient Air Quality Levels at Asphalt Plant 41 Table 31 Number of Compaction Measurements and Noise level Exceedings 43 Table 32 Number of Compaction Measurements and GV Exceed 44 Table 34 Noise Level Measurement at the Boundary of Crusher plant 46 Table 35 Noise Level Measurement at the Boundary of Fence Post Yards

at Endeavor Yard 46 Table 36 Noise Level Measurement at the Boundary of

Fence Post Yards at ICW 46 Table 37 Noise Level Measurement at the Boundary of Crusher Plant B 47 Table 38 Noise Levels Measurement at the Boundary of Asphalt Plant 47 Table 39 Analysis of the Effectiveness of Mitigation Measures 54

ADB Section

Bi Annual Report 2008 2nd Half Environmental Impact Monitoring - Page│III

List of Figures

Figure 01 Construction progress month of December (CH 0+000-CH 30+800 & GPAR) 02

Figure 02 Monitoring Locations 19 Figure 03 Rain Fall data from April to December 2008 20 Figure 04 Ground Water Levels –New Locations 29 Figure 05 pH value Surface Water Quality 31 Figure 06 BOD value Surface Water Quality 32 Figure 07 DO value Surface Water Quality 32 Figure 08 COD value Surface Water Quality 33 Figure 09 TSS value Surface Water Quality 33 Figure 10 Total Coli form value Surface Water Quality 34 Figure 11 pH Value- Ground Water Quality 34 Figure 12 EC- Ground Water Quality 35 Figure 13 Turbidity- Ground Water Quality 35 Figure 14 Total Hardness- Ground Water Quality 36 Figure 15 Total Coliform- Ground Water Quality 36 Figure 16 Fecal Coli form Value- Ground Water Quality 37 Figure 17 Status of Blasting Locations 42 Figure 18 Number of Blasting Measurements and Exceeding of GV & ABOP 43 Figure 19 Compaction Noise levels Exceedings 44 Figure 20 Compaction Noise levels Exceedings 45 Figure 21 Unsuitable Material Disposal Sits (Galle Access) 49 Figure 22 Unsuitable Material Disposal Sites (Northern Section) 49

Figure 23 Status of the Public Complaints- December 2008 50 Figure 24 Categarization of Public Complints 51 Figure 25 Complain Categorization in Percentage Vise 52 Figure 26 Affected Parties due to Construction 52 Figure 27 Damage Assessments & payment 53

ADB Section

Bi Annual Report 2008 2nd Half Environmental Impact Monitoring - Page│IV

ABBREVIATIONS

ADB – Asian Development Bank AP – Affected Person ABOP BOD

- -

Air blast Over Pressure Biochemical Oxygen Demand

CEA – Central Environmental Authority COD - Chemical Oxygen Demand CSC – Supervision Consultant (Engineer) DO dB

- -

Dissolved Oxygen Decibel

EA – Executing Agency EIA – Environmental Impact Assessment EIMO – Environmental Impact Monitoring Officer EMP – Environmental Management Plan EMU - Environmental Management Unit of RDA GN – Gramaseva Niladari ITI – Industrial Technology Institute JBIC – Japanese Bank for International Co-operation km – Kilometer MC – Management Consultants MOH – Ministry of Highways NBRO – National Building Research Organization PCRM - Public Complaint Resolving Monitoring Meeting

NGO – Nongovernmental Organization

PPV – Peak Particle Velocity PD – Project Director PM – Project Manager PMO – Project Managers’ Office PMU – Project Management Unit RDA – Road Development Authority RIP – Resettlement Implementation Plan ROW – Right of Way RSC _ Road Safety Component STDP – Southern Transport Development Project SPM TSS

_ -

Suspended Particulate Matter Total Suspended Solids

ADB Section

Bi Annual Report 2008 2nd Half Environmental Impact Monitoring - Page│V

Executive Summary The southern Transport Development Project comprises of the construction of 130 Km of new express highway between Colombo and Matara in the south -western province in Sri Lanka. The ADB funded section extends 31.4 Km. from Kurudugahahatckma to Pinnaduwa and including the Galle Port Access Road about 6 Km other total connecting roads. The Contractor, of this section is Kumagai Gumi Co Ltd. This report covers the Environmental Impact Monitoring activities for the period from July to December 2008. As per the National Environmental Act of No 47 of 1980 and the subsequent amendments, projects of this nature require Environmental Impact Assessment (EIA). The EIA of the project was approved on July 23, 1999 for a period of 3 years and the validity has been extended on April 08, 2002, August 03, 2005 and July 23, 2008 respectively until July 23, 2011. The CEA chaired monitoring committee approved the project Environmental Management Plan (EMP), which included Environmental Impact Monitoring and Mitigation Plan of the project and this report covers the fulfillment of the requirements of the EMP during the construction period. The Environmental Impact Monitoring and Mitigation of the project is carried out in accordance with the Environmental Action Plan prepared based on the Environmental Management Plan. The construction activities which affect the environment are identified as

(1) Rock and Soil excavation, (2) Embankment filling and compaction, (3) Excavation and , removal of unsutable soil and back filling, (4) Soft Ground treatment, (5) Sub base, base course and pavement laying (6) Construction of Underpasses, bridges and culvert (7) Slope protection and other miscellaneous works.

The following items are monitored during the implementation of the project.

(1) Hydrology and Drainage (2) Surface and Ground water Quality (3) Air Quality (4) Noise & Vibration (5) Social Impacts

The hydrological and drainage impact such as soil erosion of embankment, sedimentation, water stagnation, trans basin diversions, flood and earth slips are monitored in the project area. The measurements taken by the contractor to mitigate soil erosion and siltation have been inadequate. Several irrigation channels, crop land and low lands have been silted due to poor application of erosion control measures implemented by the contracting firm. The water quality monitoring carried out jointly with the Industrial Technology Institute (ITI) has not shown any adverse change in the chemical nature of surface water quality. The watering the unpaved roads being continued to control dust the main contributor to air quality deterioration. The Engineer, the Contractor and the regulating agencies (GSMB & CEA) have set up controlling methodologies for controlling the blasting and the compaction impacts. The Contractor has attended to the public complaints and resolved them to certain extent.

ADB Section

Bi Annual Report 2008 2nd Half Environmental Impact Monitoring - Page│VI

According to the observations made during the site inspections further improvement has to be done at the site. Joint inspections and monthly meetings such as PCRM have helped to sort out some of the problems at the site. The construction of the southern section, Pinnaduwa to Godagama, is abandoned due to restructuring of the contract of Kumagi Gumi and selection process of new Cntractor is going on. Soil erosion, siltation in paddy lands and water bodies, flooding due to block of culvert were the major environmental issues in this section. The previous Contractor Kumagi Gumi handing over the trace section by section to RDA after rectifying the silted paddy lands and blocked culvert.

ADB Section


1.0. Reporting Period

The current report covers the period from July to December 2008 and is based on the Monthly Environmental Reports submitted by the Roughton International, Supervision Consultant for Southern Transport Development Project of ADB funded section from Kurundugahahetekma to Pinnaduwa.

2.0. Construction Work during the Period

The following construction activities of the ADB section, from Kurundugahahetekma to Pinnaduwa Chainage 31+400 including Galle Port Access Road were continued during the period of July to December 2008 (1) UC excavation (2) Embankment filling and compaction (3) Pipe culvert extension (4) Rock excavation –Rock Blasting (5) Extension of existing under passes, bridges and culvert – (6) Cascades (7) Other miscellaneous and maintenance works. Rock excavation activities were progressed at 17 locations within ROW with the approval of CEA and the GSMB. Most of the locations major blasting was completed and level & boulder blasting are to be completed. The blasting locations at, Ch 5+340- 5+800, Ch12+500-13+300, Ch13+300-13+900, Ch20+950-21+500, Ch 21+560-22+000 Ch 22+040- 22+650 ,Ch 22+700- 23+000, Ch 23+000-23+800, Ch 23+800-24+000, Ch 24+100- 24+600, Ch 24+640- 25+100, Ch 25+500- 26+300, Ch 27+200- 27+600, Ch 29+700- 30+100, Ch 3+400-3+600 (GA), Ch 4+100-4+320(GA), Ch 4+840-4+920 (GA) are in progress at the end of December 2008. Almost all unsuitable sub soil excavation &replacement have now been completed as part of the direct construction activities. On site stockpiled excavated material are removing to the permanent disposal site and 80539 m3 yet to be transported. Normal embankment construction to widen the previously constructed embankment from 2 lanes to 4 lane using unclassified soils gained from cutting areas continuous at the locations indicated in Figure 2 Works in forming cutting either by rock blasting or excavation of soils continues and location in month of December are indicated on the chart given in Figure 2 Remedial measures to restore the failed cutting at CH 4+300 RHS commenced in early 2007 and are continuing in a strictly control manner. Work on granular pavement continuous at various locations using crushed rock and completed sections of granular pavement have been sprayed with a bituminous prime coat to seal the surface ahead of premix asphalt pavement construction. Structures include RC bridges, RC pipe and box culverts and corrugated metal underpasses and culverts and their locations, the progress on each is given on the Progress chart in Figure1

ADB Section


Figure 01-Construction progress month of December (CH 0+000-CH 30+800 & GPAR)

ADB Section


3.0. Environmental Monitoring and Mitigatory Measures

The Environmental issues of the project during the construction phase were monitored according to the Environmental Management Plan. The following key sectors were identified to monitor indicators of possible adverse environmental impacts.

Hydrology-To minimize hydrological and drainage effect such as flood level, ponding and water logging and depletion of ground water

Water Quality-To avoid contamination of water by construction and related activities, such as accidental oil spills, disposal of solid waste, construction material and domestic waste water

Ground water Quality- To avoid ground water quality deterioration arising due to construction activities and post construction related activities

Air Quality- To minimize air pollution during the construction activities Noise / Ground Vibration -To minimize the noise emission due to construction

activities and ground vibration and air blast over pressure due to blasting and compaction activity

Exploitation, Handling, Transportation and Storage of Construction Materials- To minimize the impacts

Social impacts - To minimize indirect impaction of dust, noise and vibration effects to the people close to ROW

Kumagai Gumi Co Ltd, as the Contractor for the ADB section, monitored the environmental parameters during the construction period to ascertain the impacts that may be caused of the construction activities. The environmental parameters which need to be monitored during the construction period has been specified in the EMP and listed in the Table 01. Table 01 - Environmental parameters monitored

No Discipline Parameters Frequency

1 Hydrology Water Table, Water level, PH value, Sulphate Content, Iron Content, Sediment Level

During Dry /wet season at sensitive stretches as described by Final Drainage Report.

2 Surface/Ground water quality

PH Value, Conductivity, Salinity, DO level, BOD5, COD, SS, Nitrate, Phosphate, Chloride, Oil & Grease, Zinc, lead, Total coli form, Iron, Manganese,

During wet seasons Once in six months

ADB Section


3.1. Hydrology

As per the EMP, the objectives of the monitoring of hydrology are to minimize hydrological and drainage impacts such as arising of local flood situations, changes of the surface drainage paths and depletion of ground water levels etc. Impact of the hydrological and drainage could cause;

• Construction activities such as material exploitation, reclamation of lands and improper disposal of spoil materials clearing activities, paving of the surfaces and envisaged development activities, levelling of hillocks, borrow operations cause to change the surface water flow patterns to streams and impact will be local flooding during rains and changes of moisture content of the soil.

• In cases where the road spans across narrow valleys, the filling for construction would cause significant flooding.

• Where the project trace is located on low flood plains of the major rivers due to blockages of stream floor at major rivers during rains, the flood situation will be altered.

• Unconnected culvert crossing to lead away drains would cause flooding water congestion upstream and related impacts on ground water.

• Undersized temporary culvert crossings in the service road would cause flooding and water stagnation.

• Ground water level can change in cut and fill areas. • Ground water and surface water in downstream waterways and related

area will deplete if combining of upstream drains are done especially in small catchments.

3 Air Quality Suspended particulate Matters (SPM)

On complaints during construction

4 Noise & Ground vibration

LA,eq One hour at Day time Peak particle velocity Air blast over pressure level

On complaints during construction

5 Exploitation Handling, Transportation and storage of Construction Materials

Quantity of material in temporary storage, Type of materials, Hazard level of material in relation to environmental damage including water, drainage, Duration of storage and climatic season, Method of transportation

During construction Once a week

6 To minimize the impacts on aquatic eco system , To minimize the impact on Terrestrial eco system Effects on marsh land ecosystem

Fauna and flora associated with the systems Water quality water levels and drainage, Sedimentation levels maps of critical systems future developments and land use zoning Noise dust and smoke levels , Fauna and flora associated with system of concerns

Periodical programmes in consultation with and ecologist depending on the nature of importance to suit in construction phases

ADB Section


• The proposed traces were considered on a control point basis to identify the impacts on flooding and drainage in relation to the surface water and ground water quantity. Unless adequate surface drainage flow passage across the road embankment is provided the lands will have water logging and also salinity impacts. It will be necessary to provide drainage or irrigation structures on retention areas, which are clearly identifiable as paddy or marsh on the 1:50,000 topo maps.

• Irrigation scheme segmentation and disturbances to supply and drainage channel would cause drainage impacts.

• Drainage pattern changes and embankment construction would create impacts on surface and ground water.

According to the EMP parameters such as

-water table, -water levels, -pH value, -sulfate content, -iron content, -sediment level -suspended solids,

need to be monitored in areas of -acidic or high sulfate soils, -embankment areas in flood plains, and deep cut sections below ground

water level, -water levels just upstream of embankment, -areas where soil contains high iron pyrites, -pH and chemical components at just downstream of excavations and filling

sections, -erodible areas/cut and fill sections, temporary and permanent irrigation

/drainage structure locations, -general low lying high flood prone areas, -irrigation schemes (paddy grown areas), -major drainage, structures such as bridges and culverts to identify any significant impact due to the construction activity of the STDP

The locations of water level monitoring in previously were shown in the Table 02. The water level measurement has being carried out one year period from August 2005 to August 2006 by the RDA. After 2006 monitoring of water levels haven’t been carried out in the location mention in Table 02. Table-02- Location of Water Level Monitoring- August 2005 to August 2006

No Location Area W1 11+950 LHS Cut area W2 14+300 LHS Fill area (Bridge site) W3 16+100 LHS Cut area W4 17+500 RHS Cut Area W5 17+500 RHS Blasting area W6 17+600 LHS Cut area W7 18+050 LHS Parana Ela W8 19+500 LHS Blasting area W9 20+950 LHS Blasting area W10 41+900 RHS Cut area W11 49+500 RHS W12 53+584 RHS

ADB Section


From May 2008, Contractor has started the monitoring of water levels in 16 new locations with the instruction given by RDA. Identified new locations for Monitoring of Water Levels are given in the Table -03. The parameters such as water table, pH value, sulfate contain, iron contain and sedimentation level mention in the FDR were not monitored. Only water levels were monitoring in weekly basis.

3.1.1 Monitoring Methodology

The parameters, which have been identified in the EMP for the monitoring of hydrology and drainage impact, are listed in the above. These parameters such as sulfate, iron and sedimentation level require the detail laboratory analysis and water table water level pH in-situ field data collection techniques using specified equipments and simple measuring equipments respectively. Table- 03 – Location of Ground Water Level Monitoring -New

No Location Area W1 1+800 LHS Blasting Area (35m) W2 2+000 LHS Blasting Area (40m) W3 5+270 LHS Filling area 20m W4 7+240 LHS Filling area 30m W5 8+450 LHS Filling area 35m W6 10+250 RHS Filling area 40m W7 11+780RHS Blasting Area (20m) W8 12+780 RHS Cutting Area (30m) W9 14+600 LHS Cutting Area (30m) W10 19+400 Cutting Area (20m) W11 20+780LHS Cutting Area (10m) W12 22+638 RHS Filling Area (35m) W13 26+000 RHS Cutting Area (30m) W14 28+650 RHS Filling Area (25m) W15 3+750 RHS Filling Area 10m W16 0+.820LHS Filling area 10m

3.1.2. Mitigatory Measures to be adopted

As mention in the EMP following mitigatory measures should be adopted to minimize the Impact of the affected parties

• Preparation and implementation of a through plan (Hydrology and darnage ) including its review and updating. Plan should be approved by CSC one month before construction and reviewed and or updated for implementation during construction.

• Use of extensive erosion and sedimentation control measures at all construction sites(e.g. geotextiles, siltfencing, benching of cuts, sediment basins and sediment traps, filter fabric fences, straw bale barriers)

• Provision of proper drainage systems at all construction, material exploitation and storage sites prior to their use. Stockpiles should also be coverd before heavy rains and should be located within 20m of water causes. There should be an intervening vegetated buffer to control any unexpected runoff.

ADB Section


• Best engineering practice and timing of activities for erosion and sedimentation control measures at all construction sites (e.g., geotextiles, silt fencing, benching of cuts, stabilizing vegetation and using appropriate slope dimensions etc.]

• Provision of proper drainage systems at all construction material exploitation and storage sites prior to their use.

• Scheduling of excavation operations to minimize potential erosion • Limitations on excavation depths in use of recharge areas for material

exploitation or spoil disposal. • Minimizing the removal of vegetative cover, and revegetation at 1:1 on

all construction sites1 • Ensure connectivity of all lead way drainage paths. This should be

systematically recorded. • Ensure sufficient crossings and openings in the service road to avoid short

term inundation. • Examine critical, culverts and if necessary further increase the opening

size to cater to a higher return period. • Systematic collection and analysis of the stakeholder complaints

regarding drainage. • Liaise with Irrigation Department, SLLRDE, etc. to obtain approvals for

drainage structures. • Incorporate additional measures as recommended in Drainage Report. •

3.2. Surface and Ground Water

The surface water quality deterioration can be anticipated due to the dust and earth emerges as result of construction works and materials and machineries used for bridge and culvert construction and paving works. In view of effective mitigation of the impacts, periodical testing of water quality had been proposed to identify impacts at early stages of pollution. Parameters and frequencies for water quality monitoring were listed in the Environment Management Plan. The location of the ground water quality measurement and the surface water quality measurement are given in the Table 04 & Table 05 (Refer Page 12- section 4.4.1& Page 32- section 4.4.2 of FDR, University of Moratuwa ,2001) Monitoring of water quality is schedule to be done in every six month during the construction stage. The base line measurement was carried out in August 2001 for dry period and November 2001 for wet period. Surface water quality measurement has been carried out in July 2008 for the period of July- December 2008. According to the EMP main objective of the surface water quality monitoring as follows,

• To identify adverse impact due to pooling of water , blocking of water ways, restrictions to surface runoff and flood water flows as a result of unplanned stock pilling and disposal of spoil, unstable excavations and careless camp siting.

• To identify impact due to application of weedisides and pesticides rich in heavy metals, organochlorides or organophospates for landscaping and surface cover clearing purposes that leads to surface water pollution with subsequent long term toxic effects on biota

• To identify impact due to significant oil spills from construction machinery and vehicles may lead to contamination especially during rainy days as run off carries oil rich water

ADB Section


• To identify impacts due to disposal of wash water from machinery used in concrete and asphalt plants could lead to visual pollution in terms of colour and turbidity and contamination with oily material and heavy metals such as Pb.

• Objective of the ground water quality monitoring are to identify impact due to the application of pesticides rich in heavy metals, organo-chlorides or Organophosphates for landscaping and surface cover clearing purposes could also cause groundwater contamination due to percolation through soil material having higher hydraulic conductivities, especially in areas having a significant amount of sandy material.

• To identify impacts due to construction of bridges and culverts that could

result in groundwater contamination. Deep excavations and cuts done below the mean sea level and deforestation and vegetation clearing activities could lead to substantial salinization with subsequent adverse effects on well water used for drinking and agricultural purposes.

• To identify impacts due to Piling of cleared vegetation without any removal

and/or replanting that could also lead to groundwater contamination with organics and nutrients as a consequence of anaerobic degradation by microbes.

• To identify impacts due to careless disposal of excavated peat materiel

may also lead to acidification and hardness problems during rains periods when the acidity of the peat material gets leached out, thereby resulting in dissolution of certain minerals such as gypsum, calcite, dolomite, etc.


Water quality monitoring parameters, which have been identified in the EMP for the monitoring of surface water quality, are listed in the Table 06.(Refer Annexure IV) These parameters require both the detail laboratory analysis and in-situ field data collection techniques using specified equipments and simple measuring equipments respectively. Water quality monitoring is carried out once in six month during dry and wet period. Table- 04 – Location of Ground Water Quality Monitoring

No Chainage Location Water Source (Surface / Ground water)

Present Activity

4GW 1+830 Sumith Stores, Anuruddagama, Kurudugahahetekma

Open Dug well (Shallow)

Completed embankment, Aggregate Base, sub base

5GW 9+350 K D Piyatissa, Millagaswatta, Divitura, Ethkandura

Artesian Well

Completed embankment , Aggregate sub base

6GW 25+720 Well in the Talgasyaya Tea Factory

Covered Dug well

Cut & Fill on progress

ADB Section


Table- 05- Location of Surface Water Quality Monitoring

No Chainage Location Water Source (Surface / Ground water)

Present Activity

24SW 14+100 Ginganga River Bridge deck slab on progress

25SW 19+900 Keembiya Ela , Poddala (Over the bridge)

Stream Bridge extension on progress

26SW 29+600

Holuwagoda Ela (sample Collected at existing bridge)

Stream Bridge deck slab completed

3.2.2. Equipment and Calibration Details.

Sample collection and Laboratory analysis for the water quality monitoring carried out by the ITI & CEA. Table- 06-Surface Water Quality Monitoring Parameters Parameter Test method Principle/Equipment Temperature APHA 2550 B Thermometer pH APHA 4500- H+B Electrometry Electrical Conductivity APHA 2510 B Conductometry Dissolved Oxygen APHA 4500 O-G Electrometry Salinity APHA 2520 B Conductometry Biochemical Oxygen Demand BOD 3 at 30ºC/5 at 20 º C

Modified DIN 38409 Part 52 APHA 5210 B

Manometry Electrometry

Chemical Oxygen Demand (COD)

APHA 5220 B Modified APHA 5220 D

Open reflux Titrimetry Closed reflux Colorimetry

Total Suspended Solids APHA 2540 D Gravimetry Chloride APHA 4500 –Cl B Titrimetry

Nitrate Nitrogen APHA 4500- NO3B

SLS 614 Part 1 1983 Colorimetry Colorimetry

Oil and Grease APHA 1992 5520 B Gravimetry Total Phosphate APHA 4500-PC Colorimetry Lead APHA 3111 B

APHA 3113B AAS/Flame AAS/GTA

Zinc APHA 3111 B AAS/Flame Iron APHA 3111 B AAS/Flame Manganese APHA 3111 B AAS/Flame Coliform count (MPN) SLS 614-Part 2-1983 - E-coli (MPN) SLS 614-Part 2-1983

ADB Section


3.2.3. Regulatory Standards.

Standard for the surface water quality in Sri Lanka has been proposed by the Central Environmental Authority. The proposed ambient water quality standard for inland water is given in the Annexure II. These standards are still not published. However the results of the surface water quality and ground water quality is compared with the base line data given in the FDR which were collected in 2001 (Table 07 & 08) The effluent generated from other activities such as crusher plant, casting yard, pre mix plant, motor pool in JBIC- package 01 is discharged according to the General Standards for the Discharge of Effluent in to the Inland Surface Water bodies as mention in the Table 09. Table 07 – Base Line Data for Ground Water Quality Measurements Location

Parameters 4GW

CH 1+8305GW

CH 9+350 6GW

CH 25+720

1-Aug 1-Aug 1-Aug

PH 6 5.5 5.5EC mS/cm 28.8 53.7 80

Temperature 0C 29 28 31Salinity mS/cm 9.36 16.37 17.54DO mg/c 6.9 7.2 6.8BOD mg/l 2 12 6TSS mg/l 2 2 2Chloride mg/l 5.67 9.92 10.63Phosphate mg/l 0 38.9 53.9COD mg/l 8 16 12Nitrate mg/l 0.15 1.03 1.98Total Iron mg/L 0.13 0.1 0.1Total Coli form 100/MPN 9 33 22Al mg/l 0 - 0Zn mg/l 0 - 0Pb ug/l 0.26 0.28 0.4Mn mg/l 0.28 0.14 0.35

Table 08 – Base Line Data for Surface Water Quality Measurements Location

Parameters CH 14+000 24SW

CH 19+900 25SW

CH 29+600 26SW

1-Aug 1-Aug 1-Aug

PH 7 7 7EC mS/cm 60.1 238 104Turbidity (NTU) Temperature C 30.3 33 31Salinity mS/cm 0.022 0.092 0.05DO mg/c 8 4 7.5BOD mg/l 5 40 20TSS mg/l 4 6 3Chloride mg/l 13.47 55.3 30.49

ADB Section


Sulphate mg/l 0.02 0Phosphate mg/l 0.02 COD mg/l 24 76 36Nitrate mg/l 0.4 0.24 0.39Total Iron mg/L 0.53 0.93 1.75Total Coliform 100/MPN 9 240 14Fecal Coliform 100/MPN 30 4Al mg/l 6.85 11 15.58Zn mg/l 0 - -Pb ug/l 0.26 0.58 0Fe mg/l 0.53 0.93 1.75Mn mg/l 0.12 0.19 0.19

Table 09 - General Standards for Discharge of Effluents into Inland Surface Waters

Determinant Tolerance limit Total suspended solids, mg/l, max 50 PH value of ambient temperature 6.0 to 8.5 Biochemical Oxygen Demand-BOD5 mg/l, max

30

Temperature of Discharge Shall not exceed 40 0C of the Stream within 15m down

Oils and greases, mg/ l max 10.0 Total residual chlorine mg/l, max

1.0

Lead, total, mg/l, max

0.1

Zinc total, mg/l, max 5.0

Chemical Oxygen Demand (COD), mg/l, max

250

Ammoniacal Nitrogen mg/l, max 50.0 Total residual chlorine mg/l, max 1.0

3.2.4. Mitigatory Measures to be adopted As mention in the EMP following mitigatory measures should be adopted to minimize the Impact of the affected parties Surface Water Quality

• Best management practices applied to equipment maintenance and operations to control contaminated run-off water.

• Storage of lubricants, fuels and other hydrocarbons in self-contained enclosures

• Proper disposal of solid waste from construction activities and labour camps. (Licensed sanitary landfills or designated construction disposal sits)

• Cover of construction materials and spoil stockpiles with a suitable material to reduce material loss and sedimentation.

• Minimum distance of 100 m between stockpiles and water bodies, or greater distance as needed to minimize distance of natural drainage

ADB Section


• Borrow and spoils disposal sites at minimum distance of 100 meters from drinking water sources

• Planned and quantified vegetation clearing and deforestation • Regulations and enforcement in washing construction vehicles,

equipment and machinery. • Regulation and enforcement in the use of weedisides containing

hazardous materials that are highly toxic and could bio accumulate. • Regulationm and enforcement in the use of weedicides (not containing

hazardous materials that could bioaccumulate during rainy period. • Treatment of waste water from asphalt or concrete plants using pH

correction and physicochemical treatment to the CEA standards for inland surface water

• Provision of oil and grease traps to curtail run-off carrying them to water body

• Preparation of temporary darnge management plan; one month before commencement of works

• Proper installation of TD and EC before works within 50m of water bodies • Meaningful water quality monitoring up and down stream at all bridges

during construction within 100 m of revers. Ground Water Quality

• Regular and proper maintenance of machinery, construction vehicles and equipment to prevent oil spills

• Heavy restrictions on oil storage (except in self-contained cans placed in sheds) to prevent spills.

• Avoid heavy deforestation and excessive vegetation clearing as much as possible.

• Prohibitation in the use of weedicides containing hazardous materials that could bioacumulate.

• Regulate the dumping of waste material and other wastes.

3.3 Air Quality

The major causes for air quality in the STDP are: (1) Vehicle emissions, (2) Dust during construction stage and (3) vehicular emissions during operation stage. The air quality that contributed significant level for environmental pollution had considered necessary for continuous monitoring and included in the EMP. A baseline condition survey had carried out in the project area by the Industrial Technology Institute (ITI) jointly with the CEA official for this purpose in November 2002 to January 2003. (EIA report 2000) During the construction phase vehicles traveling on unpaved roads generate dust and operating vehicles at high speed under dry weather condition can increase such pollution. Improper handling transferring of materials can also potentially generate dust. Improper storage of materials can potentially generate dust if not properly covered. Cut and fill operations of asphalt plant, crusher plant and pre mix plant can also pollute the ambient air quality According to the EMP the following parameters to be monitored during the construction phase. Carbon monoxide Sulfer dioxide Nitrogen dioxide Ground level ozone

PM 10/SPM(Dust level 8 hourly average)

ADB Section


3.3.1. Monitoring Methodology.

According to the EMP at least 8 hour sampling should be carried out depending on the complaints from local people at relevant premises. Also EMP stated that 24 hours monitoring at critical locations in dry weather condition and at least every 2 weeks during construction phase. Crusher plants, asphalt plants, pre mix plants can be considered as sensitive location in the project trace. Ambient Air quality monitoring carried out according to National Environmental (Ambient Air Quality) regulations 1994 The monitoring locations should be the list of sensitive locations prepared using EA and other available data and practical situation. Two crusher plants Crasher plant A CH 4+800 & crusher plant B CH 20+300 , asphalt plant CH 20+100, premix plant CH 14+500 are considered sensitive locations for air quality monitoring. In addition measurements need to be carried out complaints basis especially for dust. 3.3.2. Monitoring Equipment and Calibration Details.

The monitoring of dust emission was carried out by the ITI instead of the contractor. Monitoring equipment and the calibration details has been published by the Central Environmental Authority at the schedule VIII of the Gazette extraordinary No 924/12 dated 23. 05. 1996. 3.3.3. Regulatory Standards. The results of the actual monitoring should be compared with the base line data to identify the increasing trends. The prevailing stipulated national standard for the ambient air quality is given in the Table 10.

Table -10- National Standard for the Ambient Air Quality

Maximum permissible level No.

Pollutant

Average Time in mg/m3 in ppm

1 Carbon Monoxide

8 hr 1 hr Any time

10 30 58

9 26 50

2 Nitrogen Dioxide

24hr 8hr 1hr

0.10 0.15 0.25

0.05 0.08 0.13

3 Sulfur Dioxide 24hr 8hr 1hr

0.08 0.12 0.20

0.03 0.05 0.08

4 Ozone 1hr 0.20 0.10 5 Lead Annual

24hr 0.0005 0.002

-- --

6 SPM Annual 24hr 8hr 3hr 1hr

0.10 0.30 0.35 0.45 0.50

-- -- -- -- --

ADB Section


3.3.4. Mitigatory Measures to be adopted As mention in the EMP following mitigatory measures should be adopted to minimize the Impact of the affected parties

• All heavy equipment and machinery shall be fitted in full compliance with the national and local regulations. [National environmental air emissions fuel and vehicle standards E.O Gazette 1137/35 of June 2000, updates by air emissions fuel and vehicle standards (importation standards) 1268/18 December 2002 and 1295/11 June 2003]

• Routine water sprays on stockpiled soil and sand to prevent dust generation

• Vehicles transporting soil, sand and other construction materials shall be covered.

• Speed limits to be rigorously enforced and transport through densely populated areas should be avoided where possible.

• Concrete plants, asphalt (hot-mix plants), and metal crusher activities to be controlled; these facilities should be upwind of sensitive receptors (e.g., schools and hospitals) a minimum 500 meters and downwind of sensitive receptors a minimum of 100 meters.

• Care should be taken in stockpiling construction material with adequate coverage against wind, Sun and rain.

• Care should be taken to avoid spillage of construction material and dust emissions during unloading of construction material to the project site.

• Regular and proper maintenance of construction vehicles and machinery to avoid smoke emissions.

• Base line air quality standards to be monitored and a list of more sensitive areas to be prepared and ensures watering and other mitigatory measures

3.4 Noise/Ground Vibrations

The major sources of noise and ground vibration of the kurudugaha to Pinnaduwa section are: Blasting, Compaction Heavy Equipment movement Pile driving During the construction period use of construction equipment connected with the extraction, handling and transportation of material can increased noise levels. Rock blasting produces very high noise and vibration levels that may have adverse effect on any nearby communities. The Contractor and the Employer have received large number of complaints regarding the damages due to blasting. Contractor has implemented a blasting monitoring system jointly with the Geological Survey and Mines Bureau (GS&MB) and Industrial Technology Institute (ITI). Excessive noise levels were generated due to compaction, Heavy vehicle movement pile driving and the operation of crusher plants A & B ( CH 4+800 & CH 20+300), asphalt plant (CH 20+100) , batching plants (CH 14+500), Two motor pool area (CH 4+800 & 21+000) and two pre cast yard located outside ROW (Narawala- Poddala area).

ADB Section


The background noise assessment program has been carried out during the pre construction period, to measured background noise levels during two assessment periods.

• Twenty four hour background noise level measurements • Three hour background noise level measurements

However the EMP has proposed to monitor the noise levels (one hour at day time) and vibration levels and depending on the complaints from local people at their premises. Parameters to be monitored regarding noise and vibrations are listed in Table 11. To minimize the possible adverse effects to the residence in the vicinity of blasting locations, the GSMB instructed to monitor both the air blast over pressure and ground vibration on daily basis. In addition ground vibration levels were monitored at the adjacent locations where the compaction operations were carried out. Accordingly it is monitoring results appropriate action is taken if the limits are exceeded.

Table 11 - Noise/Vibration Monitoring Parameters

Noise/ vibration Parameter Remarks LAeq, One hour for Day time Day time (06.00 hrs to 18.00 hrs) LAeq, 5 min for Night time Night Time (18.00 hrs to 06.00 hrs) Vibration- Peak particle Velocity (PPV)-(mm/sec) ABOP (Air blast over pressure)

Construction activities, Vehicle movement and Blasting

3.4.1. Monitoring Methodology

Environmental noise level measurements should be carried out generally in accordance with the methods laid down in National Environmental (Noise Control) Regulation 1996 No 924/12 dated 23.05.1996 and ISO 1996 (Part 1, 2, 3) and - 4142: 1990 3.4.2. Monitoring Equipment and Calibration Details

Monitoring equipment and calibration procedure for noise monitoring should be comply with the methods published by the Central Environmental Authority at the schedule VIII of the Gazette extraordinary No 924/12 dated 23. 05. 1996.

3.4.3. Regulatory Standards

As per the regulations made under the National Environmental Act, the prevailing standard for maximum permissible noise for the construction activities is as per the Table 12 Maximum permissible noise level for the operation of other activities (Prescribed activities) in Pradesia Sabha areas and within silent zones is as per the Table 13. Maximum permissible vibration levels for the construction activities, vehicle movements and rock blasting operations are as per the Table 14.

ADB Section




• All heavy equipment and machinery shall be fitted in full compliance with the national and local regulations. [Extra Ordinary Gazette No. 924/12 May 1996 amended by E.O Gazette 937/7 April 1999]

• Heavy equipment operations shall be restricted to daylight hours in sensitive locations.

• Percussion (pile driving) operations shall be avoided in sensitive areas unless geotechnical conditions require this method to be used. Hammer- type pile driving operations shall be avoided during night time.

• Borrow and disposal sites should be located at least 200 meters from residential areas unless suitable methods will be used to mitigate the noise and vibration impacts to acceptable levels..

• Blasting activities to be minimized and controlled. Blasting to be scheduled at regular intervals with prior notice to nearby residents. Reasonable compensation to be paid to those houses that are damaged by blasting effects.

• Contractor shall take adequate measures to minimize noise nuisance in the vicinity of construction sites by way of adopting available acoustic methods. - Contractor may obtain guidelines for noise reduction from ISO/TR11688-1:1995(E), which enumerates methods by which air-born, liquid – born and structure-born noise sources may be curtailed with suitable design criteria. (Summary of design is in the Annex of EIA)

• Regular and proper maintenance of construction vehicles and machinery to avoid undue noise including irritating hums.

• Intensive monitoring of noise levels specially in nearby noise sensitive areas such as residences and schools and if predicted noise levels are excessive, then provision of noise barriers.

• Limitation of the use of explosives and mode of blasting for rock blasting activities where feasible.

• Detonators to be selected according to the sensitivity of the site. • Maximum blasting amount /specifications to be reduced based on

monitoring of the impacts. • Cover against fly rocks shall be used following adequate standards.(weight,

durability)

Table-12 - Maximum Permissible Noise Levels for the construction Activities

Permissible Noise Level at boundaries in LAeq’T where the source of noise located

Day Time (06.00-21.00)

75 dB(A)

Night Time (21.00-06.00)

50 dB(A)

Table 13 - Maximum Permissible Noise Levels for Prescribed Activities

Maximum Permissible Noise Levels at Boundaries in LAeq, T Area Day time dB(A) Night time dB(A)

Low Noise (Pradeshiya Sabha area)

55

45

Silent Zone

50

45

ADB Section


Table 14 – Maximum Permissible vibration Levels

Activity Category

of the Structure

Frequency/type

Permissible Vibration in

PPV (mm/Sec

ABOP dB (L)

Construction activity / vehicle movement

Type 3 10 – 50 (Continuous)

2.0

Rock Blasting with multi bore holes and with delay detonators

Type 3 Impulsive 5.0

115

3.5. Exploitation and Storage of Construction Material

According to the EMP main objective of monitoring the exploitation handling, transportation and storage of construction materials as follows

Unplanned exploitation of construction material from borrow areas could result in poor quality construction material and environmental problems such as collection and stagnation of rain water in the excavation. Storage of construction material on sloping grounds could increase erosion and silting the low line areas. When excavated material within the trace is used as fill material, and if proper planning and management of cut and fill operation is not followed ,large amount of materials need to be kept in temporary storage thereby causing environmental issues such as :erosion, silting, landslides etc. Unsafe and unhygienic conditions of those locations case to people adjoining to have bad impacts. Also causes to visual segregation conditions. To identify the impact due to the exploitation handling, transportation and storage of construction material following parameters should be monitored Quality of the martial in temporary storage Type of material Hazard level of material in relation to environmental damage Duration of storage and climatic season Method of transportation 3.5.1 Monitoring Methodology

The parameters, which have been identified in the EMP for the monitoring of exploitation handling, transportation and storage of construction materials, are listed in the above. These parameters require in-situ field data collection techniques using observation methods. The parameter such as hazard level of the material requires detail laboratory analysis. Temporary storage locations and the locations where material is exploited and transportation routes need to be monitored. According to the EMP the frequency of the monitoring is once a week

ADB Section




• Conditions described in the EIA report and also in the subsequent EA by

proponent in relation to selecting sites for material exploitation, to timing and use of roads for material transport, for maintenance of vehicles used in material transport or construction for selection of sites for material storage, for rock blasting and aggregate production, and for handling hazardous or dangerous materials such as oil, explosives and toxic chemicals.

• Excavation of the material from the borrow pits should be carried out without creating unsuitable surfaces of excavation such as near vertical slopes.

• Avoid as much as possible, excavation and transportation of soil during rainy weather conditions.

• When excavated material within the trace are used as fill material, proper planning and management of cut and fill operations to minimize distance of transport and temporary storage.

• Before the beginning of the construction, marking of the cut sections and the corresponding fill sections on a map for the entire trace considering distance of transport, easiness of transport, construction process etc.

• Regular revision of the map depending on the progress of construction. • As much as possible, direct transportation of the exploited construction

material from generated location to the fill section should be practice without keeping the exploited material in temporary storage.

• Maintaining and inventory of the volume of exploited material in temporary storage and revision of the construction sequence to minimize the volume in temporary storage.

•

3.6 Natural Environment

The main object of the monitoring of natural environmental are to minimize the impact on aquatic eco systems, terrestrial eco system and effect on marsh land eco system The following parameters need to be monitored to identify the impact of natural environment; Fauna and flora associated with the systems Water quality water levels and drainage Sedimentation levels Maps of critical systems Future developments and land use zoning Noise Dust and smoke levels


The parameters, which have been identified in the EMP for the monitoring of natural environment, are listed in the above. These parameters require in-situ field data collection techniques using observation methods and detail laboratory analysis. Monitoring should be carried out critical aquatic systems, and especially at major river crossings, terrestual eco systems, marsh lands. Periodical monitoring need to be carried out in consultation with an ecologist depending on the nature of importance to suit construction phase

ADB Section


Figure 02- Monitoring Locations

ADB Section


4.0. Results of Environmental Monitoring and Mitigation Measures

4.1. Hydrology and Drainage Aspects

The construction activity along with the rains compounded the problems of silt deposition and flooding. Therefore rain fall data collected as a prominent indicator of environmental degradation along the trace. The rain fall data has measured continuously from July to December 2008. Rain fall data measurement was carried out in four locations including Baddegama (CH 18+000), batching plant(CH 14+500), crusher plant A (CH 4+800) and crusher plant B (CH 20+200) . The high rainfall was experience during the April and October 2008 at the STDP ADB section (Figure 03). Figure -03- Rain Fall data from April to December 2008

Rain F all Data

0.0

100.0

200.0

300.0

400.0

500.0

600.0

Rain fall (m

m)

Baddegama (C H 18+000) 451.6 312.6 314.5 319.4 177.2 127.4 360.8 148.0 187.7

B atching P lant (CH 14+500) 463.1 357.0 333.0 296.4 200.2 104.0 385.3 250.9 197.1

C P 1(CH 4+800) 393.6 295.0 286.2 227.0 239.3 166.3 453.4 204.0 216.0

C P 2(CH 20+200) 544.4 282.7 352.2 332.8 242.2 157.9 379.5 159.8 199.8

AVE 463.2 311.9 321.5 293.9 214.7 138.9 394.8 190.7 200.2

April May J une J uly Aug S ept Oct Nov Dec

The construction activity during the rainy session aggravates the problem of the slit deposition. Most of the culverts were blocked due to siltation during the rainy session and the culvert clearing programme was launched during the period. Also construction firm provides sedimentation trap and basin, temporary

ADB Section


beams/bunds, temporary slope drains, temporary diversion boulder packing to prevent the siltation in the downstream. To achieve the target of control the siltation methods statement for temporary erosion control has been submitted by the Contractor in August 2003 and November 2007 and the statement was approved by the Engineer. (Annex 1) After starting the turfing of the embankments soil erosion control activities are getting improved along the trace of the north section. In addition construction of cascade drains side drains helps to minimize the Soil erosion. Some positive improvements of desilting & erosion control preventions of soil eroded locations along the trace during the reporting period are as follows. Table -15 Table -15 - Erosion control Work progress Chanage Description Remarks CH 1+500-CH 3+000 CH 1+500 End of the Road

protection Work completed

CH1+600 LHS silt traps desilted CH 2+120 LHS Erosion

control Works Completed

CH 2+373 LHS RCBC clearing works

Completed

CH 2+500 LHS/RHS MSP clearing works In progress CH 3+000 LHS Embankment

protedtion Completed

CH 3+100 LHS silt trap desilted CH 3+400 LHS Embankment

protection Completed

CH 3+480 LHS Silt Trap Desilted CH 3+765 LHS Deain Slong the ROW Completed CH 4+881 RCP Cleaning Completed CH 5+003 RCP LHS Toe Drain Desilted CH 5+200 LHS Desilting of Paddy land Completed CH 5+212 LHS Embankment

protection completed

CH 5+267 RCP Cleaning Completed CH 5+300 LHS Toe Drain Desilted CH 5+780 LHS silt Trap Desilted CH 6+180 LHS silt trap Desilted CH 7+110 LHS Embankment

Protection Completed

CH 8+159 LHS Embankment protecion

Completed

CH 8+280 LHS Embankmet Protection Completed CH 8+348 LHS Embankmet Protection Completed CH 8+551 LHS Embankmet Protection Completed CH 8+579 LHS Embankmet Protection Completed CH 8+600 LHS Embankmet Protection Completed CH 8+620 LHS Embankmet Protection Completed CH 8+640 LHS Embankmet Protection Completed CH 8+680 RHS Erosion of the

embankment & culvert Completed

ADB Section


cleaning CH 9+300 RHS Lead away canal Completed CH 9+950 LHS Dsilting of Culvert &

Embankment Protection Completed

CH 10+185RHS Deslting of culver & link to lead away

Compleed

CH 10+000 RCP Clearing work CH 10+199-1002C CH 10+432-1005C work CH 10+528-1006C Done CH 10+624-1008C CH 10+703-1011C CH 10+400 RHS CH 10+600 RHS CH 10+700 RHS

Embankment above the culver & desilting culvert

completed

CH 11+000 RCP Cleaning works In progress CH 11+000RHS CH 11+070 RHS CH 11+180 RHS CH 11+370 RHS CH 11+500 RHS CH 11+550 RHS CH 11+630 LHS

Embankment above the culver and clearing

Completed

CH 12+400 RHS Embankmet protection

Completed

CH 12+780 RHS Silt Trap DEsilted CH 12+800 RHS CH 12+900 RHS

Desilting the silt pond completed

CH 13+400 RHS Desilting of Paddy lands In progress CH 13+600 RHS Desilting of Paddy lands Completed CH 15+500 RHS Canal Cleaning Completed CH 16+200 LHS Desilting of Paddy lands Completed CH 16+660RHS RCP Cleaning Works Completed CH 17+435 RHS Canal Cleaning Completed CH 24+100 RHS Cleaing of Katuwatta Ela Up stream –Completed,

Down stream –in progress CH 24+100LHS RCBC cleaning works Erosion Control works-

completed RCBC cleaning- in progress

CH 24+600 RHS RCBC cleaning works Erosion control works –completed RCBC cleaning –in progress

CH 25+094 RHS CH 25+120 RHS

Protection of the embankment & clearinmg the opening

completed

CH 30+800 LHS Lead in canal cleaning completed

ADB Section


In addition the following activities are going on to minimize the hydrology and drainage issues along the ADB funded project trace Table 16- Hydrology and Drainage Activities

CH. Issue Description Status Leadway Cases

2+120

• Erosion of embankment and private land due to leadway, • Inundation of local road, land and house

• Cascade drain will be constructed along the embankment slope • RCP will be constructed across the local road at the end of the cascade • Stretch of Additional land need to be acquired to construct leadway drain • Construct MSP type leadaway drain for about 50m and remaining will be done as earth drain

KG instructed to construct leadaway upto the local road, Additional land acquisition is on progress to construct complete leadway

2+700 Leadway directed to a private land, which caused some damages

Culvert is to be removed and construct MSP to take water along the road

RCP is omitted and water directed along the ramp road upto 0213L

3+390 Leadway directed to a private land which has cinnamon cultivation

Further monitoring and will decide later

No more complain received and no progress on the issue, out of ROW

3+700 Leadway directed to a private land which has cinnamon cultivation

Additional land to be acquired and drawing preparation is being done by RI

Additional land acquisition is on progress to construct complete leadway

7+110 Leadway drain is not adequate to cater for the design discharge of the box culvert 0701C

Additional land to be acquired and drawing preparation is being done by RI


8+913 Leadway directed to the private land

Coordinate of the additional land to be acquired has been sent to RDA through our letter ref. RI/STDP/RDA/24/3151/s dated 29th October 2008.


ADB Section


12+669 Leadway is directed to the private land

Design is changed such a way that ommit RCP 1207C and divert the water path to Previous RCBC.

RCP is omitted and water directed along the highway 1206C

16+211 16+266 16+326 16+372

No proper leadway

Cut a canal through paddy field on daywork basis and leadways will be connected to it

work on progress

16+668 Leadway is directed to a private land Additional land to be

aquired. Coordinates has been sent to RDA. Ref. RI/STDP/RDA/24/3064/s dated 01st October 2008)


12+050 Leadway is directed to a private land

Additional land has been aquired. KG has been instructed to proceed with the construction of outflow drain.

additional land acquisition is done and KG instructed to construct complete leadway as MSP

29+980 Leadway is directed to a private land

Design is changed . New culvert is being constructed (3001L/1) to divert water.

RCP is temporary tapped, RDA has been requested to make clearence of assumed crown land nearby to construct leadaway

Drainage Improvement Across the Pilot Road

2+450

• Inundation of upstream due to inadequate of opening across the pilot road

Pilot road is being removed and facilitate easy flow of water.

Pilot road removed, problem completely setteled

ADB Section


9+340

• Inadequate drainage facility across pilot road

Pilot road has been diverted over the box culvert 0901C

pilot road directed over the RCBC and downstream has been cleared

Cases from SLLRDC drainage review

20+220

Inadequacy of drainage facilities through expressway

A RCBC (4.5mx2.0m) is under construction at 20+220

construction of RCBC has been completed

28+650 Inadequacy of drainage facilities through expressway

KG was instructed to construct three nos. of RCBC at this place.

construction of RCBC's are on progress

GPAR

12 new RCBC's and 3 new RCP's on GPAR

KG has already instructed and work is under consturction. Preparation of VO is underway by RI.

8 nos of RCBC's are on prgress, 4 nos of RCBC's yet to be started, 3 RCP's have been already completed

Improvement to irrigation canal through PRID

10+512

10+587~10+619 10+703~10+728

12+430

Improvement of drainage canals outside the ROW

The Employer has approved this work, accordingly KG has instructed to laise with PRID and complete the work

PRID has been requested to

do the improvement

1+400~ 2+600 (GPAR)

Improvement of Bambagala Ela canals parallel to GPAR

This work is almost finished and undertaking by PRIDTotal cost for the work is Rs. 4,568,881.96. The approval has been granted by the Employer through their letter ref. RDA/STDP/ADB/CC/VO/100/8/2008 dated 17th October 2008

On progress

Maben ela

yet to be finalized

ADB Section


39+050~43+060 Watawana Ela

The approved the revised estimate of 752,400.00 has been informed to PRID through KG letter ref. KG/STDP/GEN/7731 dated 30th April 2008. PRID has sent another revised estimate for this item and later they were informed by the Engineer that the revision is not acceptable through the letter ref. RI/STDP/RDA/62.5/3135/s Dated 22nd October 2008 On progress

Deegoda Canal (44th, 45th and 46th Km) On progress

Danduwana Ela (35th to 38th Km)

On progress

Improvement to irrigation canal, which are under Central Irrigation Department

15+500 Ela Uda Ela - Removaing of silt from upstream and downstream

Routing maintenance is done

15+700 RHS

Galagoda Ela - De-silting the canal


15+840 LHS

Galagoda Ela - De-silting the canal


17+400

Boralugoda Ela - Removing excess materials under the bridge and de-silting the downstream side

Regarding all the cases under the above subject, KG has attempted to rectify these problems several times under out instruction. RDA, Irrigation Department, and formers organization has inspected. RDA has commented about the rectification work done by KG and we have instructed them to maintain those canal as good condition as possible.


18+000

Parana Ela - Removing excess materials under the bride (B6) and clearing of the temporty bride opening.


20+000

Keembiya Ela - Lowering of pilot road to form as causeway and removing of blockage from the pipes.


ADB Section


20+600~20+380

Kasidiniya Dola - Upstream and downstream canal to be cleaned and maintain.


20+780

Bathalahena Ela - The section of this irrigation canal within ROW to be cleaned and maintain.


24+100

Katuatta Ela - Removing the silt construction of silt trap and maintain as not to flow silt from the construction site.

De-silting work done . Ref. KG letter ref. KG/STDP/RI/18078 dated 03rd October 2008


Other Drainage Improvement

49+100

Rectification of damages caused to RDA road (3465) at km 49+ 100 by water flowing from expressway and improvement of drainage system with road.

RDA has granted the approval and KG has instructed to proceed accordingly.

VO is approved and work is yet to be started by KG

Flood issues are occurred in several locations at the site area especially in the rainy seasons. Such locations are prior identified and get precautionary action for minimize the impacts. The observations of the flood issues were not included in the month of July, August and September. The details of flood issues occurred in the month of October are in the following table 17. In the month of November flooding was not observed and possible locations of flood mention in the table 18 were cleaned to avoid flooding. (Annex II) Table 17-Detali of the Flood Issues Location Impact due to flood Action taken to mitigate CH 10 +500 Blocked the pilot road .no

property damage and not due to the project activity.

CH 15+500 Blocked the pilot road. No property damage and not due to the project activity

Cut the pilot road and arrange cause way for property proper drainage

CH 20+000 Blocked the pilot road. No property damage and not due to the project activity

Cut the pilot road and arrange cause way for property proper drainage

CH 24+100 No property damage Action taken erosion control for avoid silting the box culvert for better flow rate and de silted the down stream

CH 24+600 No property damage Cleaned the culvert and mitigate erosion either side of the culvert

Unsuitable dumping site at Thalpe sout, Habaradoowa

Flood spread up to ground level of the two houses

Improved the canal for proper drainage

ADB Section


Table 18-Flood Mitigation Activities Location Precautionary measures CH 2+450 LHS Pilot road was cut and supplied enough space for proper

drainage CH 8+740 LHS Pilot road was cut and placed enough pips for proper

drainage CH 27+900 The natural stream was diverted to the box culvert

According to the Environmental Management plan water level measurement has been carried out at the locations mention in the table 2 in the section 3.1 during the period of August 2005 to August 2006. The Construction Company didn’t measures the water levels until May 2008. With the instruction given by RDA in March 2008 new locations have been identified and measured water levels from May 2008 by the Contractor. The Results were given in the graph Figure 09. The average distance considered from the centerline of the trace to well location is approx 30m and measurements were taken with respect to ground level. Maximum water level was recorded at locations CH 5+270 (W3), CH 10+250 (W6) and CH 22+638 (12) as similar to ground level. The ground water table is situated 9.6m deep from ground level at CH 7+240. The average depth of ground water table is approx 2.55m in main trace and 2.78m in GPRA. The other parameters water table pH value, sulfate contains, iron contains, and sedimentation level suspended solids have not been measured in these locations. According to the graph of ground water level Figure 04 there is no significant variation of ground water levels from May to December Table 19-Ground Water Levels –New Locations

No Location Area W1 1+800 LHS Blasting Area (35m) W2 2+000 LHS Blasting Area (40m) W3 5+270 LHS Filling area 20m W4 7+240 LHS Filling area 30m W5 8+450 LHS Filling area 35m W6 10+250 RHS Filling area 40m W7 11+780RHS Blasting Area (20m) W8 12+780 RHS Cutting Area (30m) W9 14+600 LHS Cutting Area (30m) W10 19+400 Cutting Area (20m) W11 20+780LHS Cutting Area (10m) W12 22+638 RHS Filling Area (35m) W13 26+000 RHS Cutting Area (30m) W14 28+650 RHS Filling Area (25m) W15 3+750 RHS Filling Area 10m W16 0+.820LHS Filling area 10m

ADB Section


Figure- 04- Ground Water Levels –New Locations

Ground Water L evels in ADB (North) S ec tion

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

11.0

Water levels (m

)

W1 4.9 4.8 4.8 4.8 4.6 4.6 4.5 4.3

W2 3.3 3.3 3.5 3.5 3.4 3.9 3.0 3.3

W3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

W4 9.4 9.3 9.6 9.6 9.7 9.7 9.6 9.5

W5 0.7 0.7 0.7 0.6 0.6 0.7 0.6 0.6

W6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

W7 4.1 4.1 4.1 4.1 4.0 4.0 3.9 3.8

W8 4.9 4.8 4.9 4.9 4.8 5.1 4.7 4.7

W9 1.5 1.5 1.5 1.4 1.7 1.7 1.6 1.5

W10 0.6 0.3 0.3 0.3 0.9 0.8 0.9 0.0

W11 0.8 1.0 1.0 1.0 0.9 1.2 1.2 1.1

W12 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

W13 6.4 6.4 6.1 6.0 5.9 6.2 7.5 6.2

W14 2.2 2.1 2.3 2.0 1.9 2.3 2.1 1.5

May June J uly Aug S ept Oct Nov Dec

ADB Section


Flooding is the main issue during the Monsoon seasons along the project trace. But there is no proper mechanism to monitor the flooding levels. At the December 20008 366 houses were compensated due to flooding at the locations CH 1+500 5 Houses, CH 24+000-26+000 62 Houses , CH 30+700 2 Houses, Galle access 265 Houses and Isolated locations 32 Houses . In addition to 713 houses were paid for soil sedimentation to paddy, 44 houses were paid for soil sedimentation to the tea and 23 houses were paid for soil sedimentation due to the other crops. There were no new cases during the period of July to December 2008. (Table 20) Table -20 - Locations of Affected Houses Type of Event Location Affected Assessed Paid Flooded Houses CH 1+500-2+500

CH 24+000 -26+000 CH 30+700 Galle access Isolated Locations

5 62 2 265 32

5 62 2 265 32

5 62 2 265 32

Total 366 366 366 Soil sedimentation paddies

CH 1+500-30+800 (North) CH 30+800-61+400

163 550

163 550

163 550

Total 713 713 713 Soil sedimentation tea

CH 1+500-30+800 (North) CH 30+800-61+400

39 5

39 5

39 5

Total 44 44 44 Soil sedimentation other crops

CH 1+500-30+800 (North) CH 30+800-61+400

21 2

21 2

21 2

Total 23 23 23 4.2. Surface and Ground Water Quality

Water quality monitoring of surface water and ground water was carried out selected location along the project corridor. The monitoring was carried out Central Environmental Authority and Industrial Technology Institute. The monitoring of the water quality was started before the project commencement which is considered to be the base line status. The proper analysis cannot be carried out with the available data because of the water samples were collected off and on since the commencement of the project. More number of samples is required to be collected to make proper analysis and to observe the trends of the pollution load. According to the EMP water quality should be measured twice a year during dry and wet seasons. In addition to ground water sampling should be carried out at borrow reclaimed areas and at the unsuitable material dumping yards to observed the extent of leaching and the status of pollution load. Water quality has measured in August 2001 considered as base line data. The surface water quality has measured in July 2008. Two samples from Gin Ganga at at CH 14+100 as both 100 m upstream and down stream and one sample from Kemmbi ela and Holuwaagoda ela. Table 21 hows the surface water quality measured in July 2008, location mention in the FRD.

ADB Section


Table -21 surface Water Quality Analysis

Water Quality Analysis SW24 CH14+000

SW 25 CH 19+900

SW 26 CH 29+600

Parameter July-08 (Up Stream)

July-08 (Down Stream) July-08 July-08

PH 8.4 7.7 7.4 8EC mS/cm 0.03 0.03 0.04 0.05Turbidity (NTU) 25 29 42 21Temperature C 27.1 27 27.7 27.6Salinity mS/cm DO mg/c 6.8 5.4 6.4 7.4BOD mg/l 3 1 3 2TSS mg/l 14 28 22 16Chloride mg/l 6 5 9 9Sulphate mg/l 12 10 14 10Phosphate mg/l 0.01 0.01 0.01 0.02COD mg/l 10 10 10 20Nitrate mg/l 0.15 0.27 0.2 0.3Total Iron mg/L Total Coliform 100/MPN 3000 9000 170 2400Fecal Coliform 100/MPN 140 800 20 270 The surface water quality and the ground water quality level comparisons with the previous data have given in the Figure 05 – 16. Figure -05- pH value Surface Water Quality

ADB Section


Figure -06- BOD value Surface Water Quality

Figure -07- DO value Surface Water Quality

ADB Section


Figure -08- COD value Surface Water Quality

Figure -09- TSS value Surface Water Quality

ADB Section


Figure -10- Total Coli form value Surface Water Quality

Figure -11- pH Value- Ground Water Quality

ADB Section


Figure -12- EC- Ground Water Quality

Figure -13- Turbidity- Ground Water Quality

ADB Section


Figure -14- Total Hardness- Ground Water Quality

Figure -15- Total Coliform- Ground Water Quality

ADB Section


Figure -16- Fecal Coli form Value- Ground Water Quality

In addition water quality monitoring was carried out by the Contractor due to the public complaints of well water contamination due to the dumping of unsuitable materials close to the well at the following locations. (Table 22) Table -22- Water Quality Monitoring Location Due to Public Compliant

Location Address CH 7+100 RHS Nimal Wijesinghe,

Paranajanapadaya,Ethkandura CH 16+100 (Near dumping Site) H.D. Dayananda ,Yahaladoowa Road

Baddegama CH 28+500 (Near dumping site) W.G.AnuraPasenadee kmmemana CH 30+900 (Near dumping site) A Amarasinghe Pinnaduwa

Table -23- Water Quality Results at Locations Due to Public Compliant Water Quality Analysis

CH 7+100 RHS

CH 16+100 RHS

CH 28+500(LHS)

CH 30+900 (LHS)

Max Desirable

level

Max Permissible

level

Parameter

PH 5.2 4.4 5.4 5.3 7.0-8.5 6.5-9.5 EC mS/cm 0.09 0.18 0.6 0.15 0.75 3.5 Turbidity (NTU) 16 14 77 28 Temperature C 27.2 27.6 28.3 27.8 Cl- (mg/l) 18 40 15 28 200 1200 SO42- (mg/l) 21 13 13 7 200 400

ADB Section


HCO3- (mg/l) 100 50 50 60 NO3- (mg/l) 0.44 2.12 1.24 4.53 10 Total Hardness as CaCo3(mg/l)

11 7 15 19

250 600

Total Coliform 100/MPN

340 9000 16000 2200

20

Fecal Coliform 100/MPN

80 140 5000 2

0

Water sample of wells at the Location CH 7+100 , Ch 16+100 & CH 30+900 contain high level of coliform that may be due to the toilet pit located close to the well. Well at the location CH 28+500 contain high value of coliform and feacal coliform. This may be lead to toilet pit of the house located higher elevation of the well. Surface and well water sample were analyzed around the lime pit at Thalpe Habarduwa which was approved for the Unsuitable dumping site(Table 24). Water samples were collected from the two wells in the proposed land .Theses wells are not used for drinking purposes due to high carbonate content even before dumping the unsuitable. These analytical results are used as base line data to monitor any deterioration due to filling of unsuitable materials. The analytical results are in the following table 25 Table-24-Locations of Surface & ground water quality measurement around unsuitable dumping site Thalpe

GW1 Well at land 315 block K Dammika, Niduwa, Mihiripanna GW2 Well at Land 324 block Nandasilli Wehalle, Niduwa, Mihiripanna SW1 Wakgalmodara Ela (Up stream) SW2 Wakgalmodara Ela (Down Stream)

Table- 25-Ground water Quality At Thalpe Site Water Quality Analysis

GW1 GW2 Max Desirable level

Max Permissible

level

Parameter

PH 7.2 7.1 7.0-8.5 6.5-9.5 EC mS/cm 5 7.5 0.75 3.5 Turbidity (NTU) 23 157 Temperature C 28.6 27.7 Cl- (mg/l) 1309 2049 200 1200 SO42- (mg/l) 186 407 200 400 HCO3- (mg/l) 57 93 NO3- (mg/l) 0.19 0.11 10 Total Hardness as CaCo3(mg/l) 860 1530 250 600 Total Coliform 100/MPN 340 260 20 Fecal Coliform 100/MPN 270 0 Table -26-Surface water quality at Thalpe Site Water Quality Analysis SW1 SW2

Parameter PH 8 7.8EC mS/cm 15.7 15.8Turbidity (NTU) 179 24Temperature C 30.1 30

ADB Section


Salinity mS/cm DO mg/c 6.2 5.4BOD mg/l 1 2TSS mg/l 363 103Chloride mg/l 4339 4319Sulphate mg/l 381 393Phosphate mg/l 0.02 0.02COD mg/l 130 110Nitrate mg/l 0.81 0.52Total Iron mg/L Total Coliform 100/MPN 140 330Fecal Coliform 100/MPN 140 260 Ground water quality monitoring at the locations mention in the FDR were not carried out from 2006. Instead of the FDR mention locations the contractor has selected water level measurement locations for ground water quality measurements. Four wells were selected for water quality analysis out of sixteen wells where monitoring ground water levels. (Table 27) Table 27-Results of the Ground Water Quality Water Quality Analysis

CH 2+000 (RHS)

CH 12+800 (RHS)

CH 12+500 (LHS)

CH 28+500 (RHS)

CH 0+820 (LHS)

Parameter 09/08 12/08 9/08 12/08 9/08 12/08 9/08 12/08 9/08 12/08

PH 6 5.1 5.3 4.6 4.8 5.3 5.4 5.4 5.4 EC mS/cm .04 0.06 .03 0.04 0.05 .07 0.11 .34 0.38 Turbidity (NTU) 10 17 10 3 14 10 42 10 13 Temperature C 27.6 27.7 27.3 27.6 27.3 27.8 28 28.3 27.6 Cl- (mg/l) 24 15 95 11 7 12 20 8 17 SO42- (mg/l) 0.4 1 59 2 5 12 2 0.8 32 HCO3- (mg/l) 12 40 6 50 30 6 40 12 30 NO3- (mg/l) 2.86 2.19 1.5 1.60 1.10 9 1.30 0.93 0.25 Total Hardness as CaCo3(mg/l)

19 14 107 12 19 0.76 27 7 91

Total Coliform 100/MPN

770 2800 9000 500 800 1700 330 3000 900

Fecal Coliform 100/MPN

80 210 110 110 220 140 90 220 210

Analyzed parameters exist in permissible level except pH, total coliform and feacal coliform. All these wells are in out side ROW and dumping of unsuitable or other project activities do not interfere for these locations. When compared with the base line data of water quality in these locations it does not show any deviations of pH. However levels of total coliform and feacal coliform gets increased than the base line data in the area. Also it can observe that toilet pits are within the fifty feet distance of the well.

The vehicles in the project are repaired or routine maintains at the Motor pool –A CH 4+800 LHS and Motor Pool B 21+300 RHS. Washing water contains with oil goes through the oil separation tanks to remove the oil and discharge in to the environment.

ADB Section


Waste water sample in motor pool A analyzed in October .The results were given in table below. There were no enough samples to be collected in Motor pool B due to dry season. Table -28- Water Quality Results of Waste water discharged at motor Pool Parameter Units Results Tolerance limit Motor Pool A Motor Pool B pH 6.7 5.0-8.5 EC mS/cm 0.17 Turbidity (NTU) 67 Temperature C 29.2 40 Oil & Grease Mg/l 15 10 Oil & Grease level of the discharge waste water does not comply with the National Standards in motor pool A. Further improvements are needed to remove the oil & Grease from discharge waste water

4.3. Air Quality Monitoring Results

During the reporting period, the Contractor has completed most of the earth work activities from Kurudugahahetapma to Pinnaduwa. The Gale Port Access Road and the 4 lane extension work according to the revised contract were on progress. According to the work carried out thought the period the possible air emission source was dust from the vehicle movements and the operation of crusher plant, asphalt plant and concrete batching plants The SPM level was measured by ITI at crusher plant-A, plant -B and concrete batching plant. As specified in National Environmental (Ambient Air Quality) regulations in 1994 under the National Environmental Act No 47 of 1980, desired SPM level is 035 mg/m3 for 8 hours average time and 0.45 mg/m3 in the 3 hours average time. According to the ITI report, the measured levels were given in the table 29 Table -29 - SPM Measurement Results

SPM(mg/m3) Location

Measured level Permissible

level

11/07/08

Dry/sunny

SPM

(03hrs)

02/10/08

Dry/sunny

SPM

(03hrs)

5/12/08

Dry/sunny

SPM

(08hrs)

03 hrs 08 hrs

Crusher plant A 0.13 0.47 0.13 0.45 0.35

4/07/08

Dry/sunny

03 hrs

08/11/08

Dry/sunny

03 hrs

11/12/08

Dry/sunny

08 hrs

ADB Section


Crusher plant B 0.23 0.16 0.04 0.45 0.35

21/08/08

Dry/ Sunny

03 hrs

21/11/08

Wet

3 hrs

Concert Batching Plant 0.02 0.03 0.45 0.35

08/08/08

Dry/sunny

03 hrs

28/11/08

Wet

03 hrs

Asphalt plant 0.09 0.06 0.45 0.35

ITI has measured the SPM level at the crusher plant A in July, October & December 2008 and crusher plant B in July November & December 2008. In concert Batching Plant and Asphalt plant August and November. According to the EMP, 8 hours average dust measurement need to be carried out. But the contractor has carried out 3 hour average measurement for previous measurement and started 08 hrs average SPM measurements from December with the instruction given by MC. SPM measurements in Crusher Plant A exceed the National Standards for 03 hrs average in October measurement. As mitigatory measures sprinkle system has been improved at the Jay crusher and cone crusher to minimize the dust emission. In the other measurements the results measured SPM levels were lower than the permissible level under the National Standards. In the month of November ambient SO2 and NO2 measurements were carried out in Asphalt plant. Results are given in the Table -30- Table -30- Ambient Air Quality Levels at Asphalt Plant Parameter Value (mg/m3) Maximum permissible Level

(mg/m3) Sulphur Dioxide (SO2) 0.01 0.20 Nitrogien dioxide (NO2) 0.02 0.25

According to the results SO2 and NO2 levels in ambient air in the vicinity of Asphalt plant are within the permissible level according to the National standards. The crusher plant and the asphalt plant are located away from the public and other sensitive locations. The CEA approval has been granted for 24 hrs operation of crusher plant. Further Contractor carried out regularly monitoring, visual observations at each work site and accordingly prepared a schedule to identify the excessive dust emission locations. According to the EMP dust (SPM) measurements need to be carried out for complaints. However any measurement has carried out to monitor dust level due to complaints during the reporting period. The Contractor had continued watering of exposeed areas and sensitive locations to prevent dust emission from construction sites. Both dry and wet weather conditions were prevailed due to inter monsoon rains. The Contractor had modified the watering schedule accordingly to prevent dust. Water browser had been employed to control dust in the entire the pilot road and public road sections crossing the expressway in the north section.

ADB Section


The drilling machines were equipped with dust collectors to prevent dust in the drilling sites. The hand drill machines are lack of these equipments. Also the vehicle speed within the site is limited to 30 Km/hr and this appears to have not been adhered to by the Contractor’s vehicles. The speed limits sign boards have been fixed all along the corridor.

4.4. Noise & Vibration Monitoring Results

The noise and vibration sources were in this section compaction and rock blasting activities. End of December 2008 there were 18 out of 33 rocks excavation site were operated along the trace. (Figure -17) During the blasting activities the affected houses are evacuate as permanent and temporary basis according to the GSMB and CEA recommendations and 1595 houses were identify as affected due to operation of the metal excavation.

Figure- 17 - Status of Blasting Locations

Air blast over pressure and ground vibration is being measured at the complaints houses during the blasting take place. Figure-18 shows the number of measurements carried out during the months July to December 2008 and the number of exceeding of ABOP and Ground vibration.

ADB Section


Figure 18-Number of Blasting Measurements and Exceeding of GV & ABOP

During the reporting period 3350 blasting were carried out in 569 locations and 1863 blasting were monitored by ITI and 1487 were monitored by GSMB. 25 Air blast over pressure measurements and 12 Ground vibration measurements were reported during this period. The common reason for the GV exceedences may be due to geological conditions of the area and higher ABOP results due to weather conditions. Test blast is carried out at every location prior to production blasts to obtain GSMB mining license and Environmental recommendation from CEA.

Compaction monitoring was carried out in order to determine the noise and vibration levels exceed the recommended level at the nearest residential locations. The activity carried out during the above period was soil compaction, Base compaction, RUC compaction and sub grade compaction. The main machineries used were sheet foot roller, vibrating roller namely SPF 56, CS 533, V 160D & CA280, dozer and hammer. Summary of the noise monitoring of compaction activity and number of exceeding the permitted levels are given below (Table 31 & Figure-19-).

Table 31-Number of Compaction Measurements and Noise level Exceedings Month Base Compaction Soil compaction RUC Compaction Sub grade

compaction

Number of Measurement

Exceedances


Exceedances


Exceedances


Exceedances

July 44 1 37 No 9 1

August 47 8 52 3

September 16 4 57 2 27 No 8 3

ADB Section


October 17 NO 24 3 3 1

November 42 1 21 1

December 40 1 23 NO

High noise levels due to high capacity machines to maintain required density of the layer. In particular, this situation is common in residencies which are situated closer to the ROW. To overcome this problem, low capacity machines in high frequencies especially, when construction activities are carrying out in closer residual areas.

Figure - 19- Compaction Noise levels Exceedings

Summary of the vibration monitoring of compaction activity and number of exceeding the permissible levels are given below Table 32 & Figure 20.

Table 32-Number of Compaction Measurements and GV Exceed Month Base Compaction Soil compaction RUC Compaction Sub grade

compaction


Exceedances


Exceedances


Exceedances


Exceedances

July 44 7 37 14 9 7

ADB Section


August 47 17 52 8

September 16 4 57 15 27 9 8 1

October 17 2 24 18 3 1

November 42 37 21 7

December 40 17 23 14

High vibration levels due to high capacity machines to maintain required density of the layer. In particular, this situation is common in residencies which are situated closer to the ROW Further it was clearer that vibration levels measured in three different activities were different to each as it depends on the material used to compaction. Higher value recorded for RUC compaction and lower values recorded for soil compaction as soil is softer than RUC.

Figure- 20- Compaction Noise levels Exceedings

Noise level measurement at the boundary of the crusher plants, Concrete batching plants, asphalt plant have been carried out by ITI and GSMB ( Pvt) Ltd. (Table 34 to 38)

ADB Section


Table -34- Noise Level Measurement at the Boundary of Crusher plant -A

Noise level (Day Time) dB (A) Noise Level (Night Time) dB (A)

Location Annexure

II

July August Sept Nov July August Nov

A

48 51 60 59 47 48 58

B

60 60 58 63 56 55 62

C

54 50 45 ** 58 48 **

D

63 66 58 55 49 48 50

F

56 58 63 54 60

** - No contribution to the back ground level Noise level variation at the boundary of the crusher plant due to the reduction of the aggregate barriers along the boundary of the premises. The contractor has taken some mitigatory measures such as enclose the high noise area of the plant and noise barries at the boundary to minimize the nuisances to the nearby residences. Also Contractor are being paid inconviniance allowence to the nearby residences.

The two pre cast yards are working for cast fence post to be marked the right of way along the trace. The yard was placed at Poddala in outside of the ROW.

Table-35-Noise Level Measurement at the Boundary of Fence Post Yards at Endeavor Yard

Table-36-Noise Level Measurement at the Boundary of Fence Post Yards at ICW

The measured noise level on 1/11/2008 shows considaralbe noise reduction due to implementation of mitigatory measures. However the measured noise level at the boundary of the ICW yard shows higher levels than the permtterd levels

Location

(Endeavor Yard)

Corrected Noise level

dB(A)(04/10/2008)

Corrected Noise level dB(A)

(01/11/2008) A 57 55 B 58 54 C 58 52 D 52 49

Location

(ICW Yard)

Corrected Noise level

dB(A)(04/10/2008)

Corrected Noise level dB(A)

(01/11/2008) A 64 58 B 64 58 C 68 69 D 58 58 E 60 57

ADB Section


Table–37-Noise Level Measurement at the Boundary of Crusher Plant B

Day Time* Night Time

Corrected Noise Levels dB(A) Corrected Noise Levels dB(A)

Location Annexure III Aug Sep Nov Sept Oct Nov A

B

C

D

H1

H3

H5

H6

H10

H15

H17

60

52

53

58

62

60

60

2

58

60

47

54

54

44

57

57

57

56

44

52

55

57

53

48

50

50

50

50

56

57

56

55

50

50

56

59

56

55

**

51

53

**

57

51

**

* High noise level due to the operation of rock breaker within ROW

High noise level at the Location A was operation of the rock breaker within ROW. To minimize the excessive noise at the boundary of the crusher plant Contractor has introduced noise barriers at the boundary and enclose the high noise area at the plant. Also compensations are being paid for inconvenience to the nearby residences.

Table- 38- Noise Levels Measurement at the Boundary of Asphalt Plant

According to the results of the asphalt plant the locations H177,H77& H78 exceed the maximum permissible level for day time. (Table 38) 4.5 Exploitation Handling, transportation and Storage of Construction

Materials The parameters mention in the EMP regarding the exploitation handling, transportation and storage of construction material are not available in the monthly reports of the supervision consultants. RDA has informed the contractor to maintain the required records regarding the above and supervision consultants requested to includes the details into the monthly reports.

Location*

Residual Noise Level dB(A)

Corrected Noise Level dB(A)

H177

H77

H75

H78

48

48

48

48

61

58

53

58

ADB Section


5.0 Status of Environmental Licenses and Permits

According to the Miniing and Mineral Act No 33,1992 and National Environmental Act No 47 of 1980 and its subsequent amendments, relevant licences should be obtained from GSMB and CEA respectively. For the month of July, 2008, two Mining Licences and Environmental Recommendations were obtained for blasting activities in for two locations. Approvals for night work renewed for 03 locations to work up to 21.00hrs to maintain the noise level at 75dB (A). The EPLs issued for the operation of two Crusher Plants, Asphalt and Batching Plants were amended including conditions to carry out SPM and Noise Measurements once in three months. For the month of August, 2008, one Mining Licences and Environmental Recommendations were obtained for blasting activities at 13+300 – 13+900 km. Approvals for night work renewed and activated for 03 locations to work up to 21.00hrs to maintain the noise level at 75dB (A). For the month of September, 2008, four Mining Licences and one Environmental Recommendation were obtained for blasting activities at 26+200-26+300, 22+700-23+400, 18+300, 29+300, 22+700 and 23+400 km. Approvals for night work renewed and activated for 06 locations to work up to 21.00hrs to maintain the noise level at 75dB (A) and Environmental Approvals were extended for night work up to 24.00hrs from 21.00hrs by maintaining the noise level at 50 dB(A). For the month of October, 2008, five Mining Licences and four Environmental Recommendations were obtained for blasting activities at five locations. Approvals for night work renewed and activated for 03 locations to work up to 21.00hrs to maintain the noise level at 75dB (A). Further, Environmental Recommendation has been obtained for disposal of unsuitable material site at Thalpe South, Habaraduwa. For the month of November, 2008, four Mining Licences and two Environmental Recommendations were obtained for blasting activities at six locations. Approvals for night work renewed and activated for 06 locations to work up to 21.00hrs to maintain the noise level at 75dB (A). For the month of December, 2008, two Mining Licences and two Environmental Protection Licences were obtained. Approvals for night work renewed and activated for 06 locations to work up to 21.00hrs to maintain the noise level at 75dB (A).

There were 34 unsuitable sites have been identified in the Galle Port Access road and 26 sites in the north section. (Annex III)

According to the information given by the Contractor 34 disposal sites have been identify in the GPAR. Out of them 25 sites were approved by CEA, 03 sites were rejected, 02 sites pending for approvals and 04 sites required IEE reports.(Figure 21)

In the northern section 26 sites were identified as disposal sites and 25were approved and 01 site was rejected by CEA. (Figure 22)

ADB Section


Figure 21-Unsuitable Material Disposal Sits (Galle Access)

Total Sits Selected

Approved s ites

C ompleted

F illing S tarted

F illing Not Started

R ejected

S uspended

P ending

IEE Required

0

5

10

15

20

25

30

35

Axis Title

Uns uitable Material Dis pos al S its (G alle Ac c es s )

Unsuitable Material Dis pos alS its (G alle Acces s )

34 25 1 4 7 3 7 2 4

Total S its

S elect

Approved

s ites

C ompleted

F illing S tarte

d

F illing Not

S tarte

R ejected

S us pended

P ending

IE E Required

Figure-22 Unsuitable Material Disposal Sites (Northern Section)

Total Sits Selected

Approved s ites

C omp

leted

F illing S

tarted

F illing N

ot Started

R ejected

S uspended

P ending

IEE R equired

05

1015202530

No of Sites

Uns uitable Material Dis pos al S its (Nothern S ec tion)

Unsuitable Material Dis pos alS its (Nothern S ec tion)

26 25 11 7 5 1 1 1

Total S its

S elec t

Approved

s ites

C ompleted

F illing S tarted

F illing Not

S tarted

R ejected

S us pended

P ending

IE E Required

ADB Section


6.0. Public Complaints

Total complaints received up to 30th October 2008 were 5251 in the north section and action has taken for 5204 cases. In the south section 1636 complaints have been received up to 30th October 2008 and actions taken for 1633 cases. The complains categorized into 18 category and the highest number of complaints received for vibration and damage due to blasting , compaction , incidentals and damage due to cultivation. In October 2008 the Contractor revised the complaint received list from the re-structured contract commence dated 10-01-2007. According to the above list received complaints for the period of 2007 to 2009, were 1462 in the northern section and action taken for the 1305 cases. 189 cases remain to be attended. In the revised list the Contractor reduced the category of received complaint up to 8. Highest complaints received this period were vibration and damage due to blasting, Damage to cultivation, and Vibration and damage due to compaction In south section 208 cases have been received during the period of 10/01/2007 to December 2008.Action taken for the 199 cases and 9 cases remain to be investigated. Most of the cases received during this period Damage due to cultivation, Vibration and damage due to compaction, Heavy vehicles movement and incidentals The Figure-23, 24 & 25 gives the information about the summery of the complaints and complaints resolution up to December 2008. Figure - 23 - Status of the Public Complaints- December 2008

ADB Section


Figure -24 - Categarization of Public Complints

7.0. Social Impacts

The Contractor, the Engineer and the Employer have entertained 1494 public environmental claims regarding construction related impacts during the period of 10/01/2007 to December 2008. The Contractor, Supervision Engineer and the Employer have formed the joint committee to investigate the complaints. Combined meetings were held to monitor both the obstruction and public complaints resolving and Obstruction Public complaints Resolving Monitoring (O&PRCM) during this period. During the process of complain investigation Contractor has identified 3401 cases were affected. Out of the above cases they have assessed 2427 cases and compensation has been paid for 1992 cases. The highest affected cases have been identified due to blasting activities. (Figure- 26 & 27).

ADB Section


Figure -25– Complain Categorization in Percentage Vise

Figure-26- Affected Parties due to Construction

ADB Section


Figure-27-Damage Assessments & payment

8.0. Conclusion and Recommendation

Environmental impacts owing to construction activities of the STDP were minimized according to the description of planned Mitigation measurement given in the EMP. A summary of the mitigation measures adopted during the reporting period and the effectiveness of the mitigation measures and further action recommended for improving the mitigation measures are given in the following table 39

AD

B Section

Bi A

nnual Report 2008 2

nd Half

Environm

ental Imp

act M

onitoring - Page│

54

Table 39 - Analysis of the Effectiveness of M

itigation Measures -

Environm

ental Managem

ent Plan matrix (In accordance to C

EA)

Environmental

Concern

Mitigation M

easures

Com

pliance

Com

ments/ Recom

mendations

1.Hydrology and Drainage A

spects

1. Use of extensive erosion and sed

imentation control

measures at all construction sites (e.g. geo textiles, silt

fencing, benching of cuts etc). 2. Provision

of proper

drainage

systems

at all

construction, material exploitation; and

storage sites prior to their use.

3. Consid

eration of weather cond

itions when particular

construction activities

such as

cut opera

tions are

undertaken.

4. Limitations on excavation d

epths in use of recharge areas for m

aterial exploitation or spoil disposal.

5. Use of landscaping as an integrated com

ponent of construction activity as an erosion control m

easure. 6. M

inimizing the rem

oval of vegetative cover as much

as possible and provid

ing for it s restoration where

construction sites have been cleared of such areas. 7. Som

e other

mitigation

measures

recomm

ended

in

Drainage Report of STD

P to be followed. (Section 11,

page 169)

1.Mod

arate 2.M

odarate

3.Moderate

4.Yes 5.Yes 6.Yes 7.Yes

1. The Contractor has subm

itted the soil

erosion control measures and

it was

reviewed

and

approval has

been given

by the

Engineer/Employer

to take

necessary action.

(15th N

ovember

2007 5

th Subm

ission). Erosion

prevention m

ethods

are getting im

proved w

ith the works d

one by the C

ontractor as mention in the

Section 04

and

turfing

of the

embankm

ent minim

ize the issue of soil erosion to the outsid

e of the ROW

. 2. The C

ontractor add

ress the problem

and

provided

necessary d

rainage system

prior to start the work

3. There are limitations in sched

uling the construction w

orks only during d

ry w

eather conditions. The project area

experienced unexpected

no of rainy d

ays 4

At

the tim

e of

detailed

design,

excavation depth w

as determ

ined on

considering this cond

ition. 5

Turfing of the some area w

here construction

activities nearly

completed

have

done

and

some

AD

B Section

Bi A

nnual Report 2008 2

nd Half

Environm

ental Imp

act M

onitoring - Page│

55

area in

progress. How

ever m

aintenance such as grass cutting is poor .The C

ontractor was ad

vice to m

aintain the grass turfed area.

6 Removing of vegetation cover w

as strictly lim

ited to RO

W

7. All previous flood

dam

age on was

settled. Includ

ing earth slip and G

PAR.

However, no d

amages d

ue to recent flood

s 2. W

ater quality

1. Proper construction

of TD

and

EC

m

easures m

aintenance and m

anagement includ

ing training of operators and

other workers to avoid

pollution of water

bodies by the operation of construction m

achinery and

equipment.

2. Storage of lubricants, fuels and other hyd

rocarbons in self-contained

enclosures. 3. Proper

disposal

of solid

w

aste from

construction

activities and labour cam

ps. 4. C

over the construction material and

spoil stockpiles w

ith a suitable m

aterial to reduce m

aterial loss and sed

imentation.

5. Avoid

ing stockpiling to water bod

ies. 6. Stripped

material shall not be stored

where natural

drainage w

ill be disrupted

. 7. Borrow

sites should not be close to sources of d

rinking w

ater.

1.Yes 2.no 3.poor 4.N

o 5.Yes 6.Yes 7.Yes

1. Construction of brid

ges and other

structures over the rivers are almost

completed.

Therefore no

contamination

of w

ater bod

ies is

observed

2. Fuel tanks located in open air and

there are no second

ary containments

to cater any accidental spill. O

il traps are

not properly

function. Frequent

maintenances need

ed

3. Solid w

astes are not properly disposal

in the plant sites. 4. C

ontractor disputed

the condition as

impractical.

6. D

isrupted natural

drainage

was

cleared

7. Water levels close to the deep cut

areas are measured

3. Air quality

1. All heavy equipm

ent and m

achinery shall be fitted in

full com

pliance w

ith the

national and

local

regulations.(Relevant regulations

are in

the M

otor Traffic A

ct, Highway A

ct)

1.Moderate

1. A

ll vehicles

satisfy the

SL traffic

requirements

and

the vehicles

not satisfy the sam

e is not allowed

to work

in the project. However the vehicle

AD

B Section

Bi A

nnual Report 2008 2

nd Half

Environm

ental Imp

act M

onitoring - Page│

56

2. Stockpiled soil and

sand shall be slightly w

etted before

loading, particularly in w

indy cond

itions. Control all

dusty m

aterials at source. Plan to minim

ize the dust

within the vicinity of tea land

s. 3. Fuel-efficient and

well-m

aintained haulage trucks shall

be employed to m

inimize exhaust em

issions. 4. V

ehicles transporting soil, sand and

other construction m

aterials shall be covered. Limitations to speed

s of such

vehicles necessary.

Transport throug

h d

ensely populated area should be avoid

ed.

5. To plan minim

ize the dust w

ithin the vicinity of tea land

s. 6. Spraying of bare areas w

ith water.

7. Concrete plants, asphalt, m

etal crusher activities to be controlled

(e.g. asphalt hot-mix plants should

not be close d

ownw

ind of sensitive receptors such as schools

and hospitals).

2.Moderate

3.Data not

available 4.Yes 5.Fair 6.Yes 7.Yes

emission d

ata are not available with

the Contractor. A

ll vehicles use in the project recom

mend

ed to ob

tained

the emission certificate for the year

2009 2. W

etting of dry surfaces continued.

However, d

uring dry cond

itions some

dust

problems

recorded

in

the construction sites. Frequency of the w

atering should be increased

during

the dry period.

4. All vehicle transporting m

aterials were

covered w

hich are using the public road

s on

special perm

issions. The

vehicles transporting materials in the

service road

s are

not essentially

covered. How

ever, the

Contractor

was

advised

to

follow

the C

EA

regulation on the matter

5. The dust barriers are provid

ed close to

the tea

land

especially close

to asphalt plant. C

ontractor has initiated

action to

extend

the d

ust cover.

Dam

age is compensating. SPM

levels m

easured

at the

Crusher

plans, A

sphalt plant & Batching plants and

the recoded

levels were low

er than the perm

issible level 7.

Water

sprinkles are

fixed

at the

crusher plant , wet scrubber system

at asphalt plant helps to controls d

ust at these plants

AD

B Section

Bi A

nnual Report 2008 2

nd Half

Environm

ental Imp

act M

onitoring - Page│

57

4. Noise / G

round Vibration

1. All heavy equipm

ent and m

achinery shall be fitted in full

compliance w

ith the national and local regulations.

.(Relevant regulations

are in

the M

otor Traffic

Act,

Highway A

ct) 2. A

s a rule, the operation of heavy equipment shall be

conducted

in daylight hours.

3. Hamm

er-type pile driving operations shall be avoided

during night tim

e. 4. C

onstruction equipm

ent, w

hich generates

excessive noise, shall be enclosed

. 5. W

ell-maintained

haulage trucks will be used

with speed

controls.

6. Borrow sites should not be close to resid

ential areas. 7. Blasting activities to be controlled

(e.g. daytim

e hours only,

and

with

advance

notification to

nearby resid

ents). 8. Blasting should be d

one at regular intervals and people

should be inform

ed. Reasonable com

pensation to be paid

to those houses that are dam

aged by blasting

effects. Cond

ition surveys/crack surveys on all structures close

to blasting/com

paction/piling sites

to be

conducted

before comm

encement of activities.

9. Contractor shall take ad

equate measures to m

inimize

noise nuisance in the vicinity of construction sites by way

of adopting available acoustic m

ethods.

1.Yes 2.Yes 3.Yes 4.Yes 5.Yes 6.Yes 7.Yes 8.Yes 9.M

odarate

1. A

ll vehicle

register and

necessary

approval have been taken for all m

achinery. ( In Sri Lanka there is no regulation

for vehicle

noise or

silencer noise 2.

CEA

has

issued

license for

construction works up to 21.00 hours

for selected location. 3. C

onstruction works lim

ited to d

ay time

and

only approved

project

works

continue during night (C

rusher plants and

other

locations approved

by

CEA

). Pile

driving

operation

has com

pleted along

the A

DB

funded

North Section

4. The noisy equipment at C

rusher plant is enclosed

and actions w

ere taken to m

aintain the approved levels of noise

at the

boundary

of resid

ential prem

ises. A

n inconvenience

allowance is paying in the locations

exceed

noise levels.

However,

the Engineer

requested

mitigation

of im

pacts. C

ontractor has

installed ad

ditional

crusher plant

at C

rusher plant

A.

Engineer requested

mitigation m

easures. CEA

has granted

approval for the additional crusher

8. Blasting

is strictly

controlled

and ensures that the cond

itions given in the ap

provals are strictly applied.

The houses around the 500 m

at the

AD

B Section

Bi A

nnual Report 2008 2

nd Half

Environm

ental Imp

act M

onitoring - Page│

58

blasting sites

were

surveyed

and record

ed the

existing cond

itions. N

ew approval granted d

uring this period

and a summ

ary of blasting d

etails is attached (A

nnexure I). The com

pensation process for identified

effected

houses

are going

on.(Summ

ery sheet

is attached

- (A

nnexure-II) 9. Low

vibration impact com

pactors, low

noise

equipments

has introd

uced at the critical locations.

Noise

barriers, enclose

the high

noise areas of plants , compensate

for effected

peoples

are som

e positive

approaches for

the problem

5.Soil Erosion/ Surface Run-off

1. Back-fill should be com

pacted properly in accord

ance w

ith design stand

ards and graded to original contours

where possible.

2. Cut areas should

be treated against flow

acceleration w

hile filled areas should be carefully d

esigned to avoid

improper d

rainage. 3. Stockpiles should

not be formed

within such d

istances behind

excavated or natural slopes that w

ould red

uce the stability of the slopes.

4. In the

short-term,

either tem

porary or

permanent

drainage w

orks shall protect all areas susceptible to erosion.

5. Measures shall be taken to prevent pond

ing of surface w

ater and scouring of slopes. N

ewly erod

ed channels

shall be backfilled and

restored to natural contours.

6. The C

ontractor should

arrange to

adopt

suitable m

easures to minim

ize soil erosion during the construction

1.Yes 2.Yes 3.Yes 4.M

oderate 5.M

oderate 6.M

odarate

1. N

ecessary action

have been

initiated

by the Contractor and

need im

provement

2. Cut slop d

rains and beam

sealing are ad

opted

3. Stockpiles are

placed at

stable places

4. A

lmost

all locations

which

require d

rainage were provid

ed. However,

the drainage is obstructed

by the tem

porary w

orks. N

ecessary precautionary m

easures were taken

to minim

ize adverse effect.

6. Tem

porary &

perm

anent erosion

AD

B Section

Bi A

nnual Report 2008 2

nd Half

Environm

ental Imp

act M

onitoring - Page│

59

period. The C

ontractor should consult Ag. Societies, A

g. A

uthorities in

the area

before d

eciding

mitigation

measures.

7. Surface protection

measures

such as

turfing to

be carried out as early as possible. The protection shall be applied

in completed

portions of surfaces, if such is possible w

ithout waiting for the entire section to be

completed.

8. Clearing of green surface cover to be m

inimized

during

site clearing. 9. Replanting trees to be d

one with appropria

te trees to ensure interception of rainw

ater and the deceleration

of surface run-off. 10. Large scale nurseries should

be located w

ith access to good

supply of water for the care and storage of

appropriate vegetation to be re-used on site.

7.Moderate

8.Yes 9.N

o 10.N

o

measures w

ere provided

to arresting the

erosion. M

ost of

the crop

dam

ages w

ere assessed

and

compensation paid

. 7.

Turfing of

embankm

ent has

been started

by the Contractor. M

ost of the areas are now

completed

where

turfing necessary. 8. Site clearing w

orks are not happing at this stage.

9. Mc has given the instruction to the

Engineer to instruct the Contractor to

comm

ence the activities. 10. N

ot yet attended

6. Exploitation Handling, Transportation and Storage of C

onstruction m

aterials

1. In order

to m

inimize

and

or avoid

adverse

environmental

impacts

arising out

of construction

material exploitation, handling, and

transportation and

storage measures to be taken in consid

ering with the

EIA/C

EA cond

itions / recomm

endations.

2. Cond

itions that a

pply for selecting sites for material

exploitation. 3. C

onditions tha

t apply to tim

ing and use of road

s for m

aterial transport. 4. C

onditions that a

pply for maintenance vehicles used

in m

aterial transport or construction. 5. C

onditions that apply for selection of sites for m

aterial storage.

6. Cond

itions that apply for rock blasting and aggregate

production

7. Cond

itions that

apply

for handling

hazardous

or

1.Yes 2.Yes 3.Yes 4.Yes 5.M

oderate 6.Yes 7.Yes

1. A

ll vehicles registered as per the SL

regulations, Speed limits applied

for all

heavy vehicles

and

covered m

aterial transport

out side

of the

project. 3. Lim

ited land

s available in the area

and options for selection of sites are

also limited

. Only service road

is used for haulage.

5. Lim

ited availability

of bare

lands

restricted the best selection.

6. GSM

B/CEA

approvals issued

for all

AD

B Section

Bi A

nnual Report 2008 2

nd Half

Environm

ental Imp

act M

onitoring - Page│

60

dangerous m

aterials such as oil, explosives and toxic

chemicals.

the blasting and borrow

sites, disposal

sites, crusher

plants and

vehicle

maintenance yards. G

SMB/ITI team

s are m

onitoring all blasting operations in

add

ition to

the Engineer’s

supervision. 14. Im

pact on W

etlands

1. A

void d

isposal of wash w

ater, solid waste

and d

iscarded

packing etc. on wetland

s. 2.

Piling up of loose material should

be done in

protected areas to arrest w

ashing out of soil. In add

ition, these m

aterials should not be tipped

or stockpiled near

wetland

s. 3.

Leftovers from concrete plants should

not be d

umped close to w

etlands.

4. A

void tem

porary structures or stockpiling on w

etlands

5. A

pplication of pesticides d

uring the period of rain should

be totally stopped. Use of fertilizers should

be m

inimized

.

1.Yes 2.Yes 3.Yes 4.Yes 5.Yes

1. M

ost of

project areas

pass through the flood

plains of major rivers.

Limited

availability of proper disposal

sites restricted the selection of proper

sites. Marginal land

s and the lim

e pits w

ere mostly selected

for the removal of

debris/ d

iscarded m

aterials. However

preference will be given for filling lim

e pits. M

ihiripanna disposal yard

is used after IEE approval

Also d

rainage facilities have been established

accord

ing to

the SLLRD

C/ID

requirements

6.Pesticides are not applied for any

activity of the project

ADB Section


ANNEX - I

ADB Section


ANNEX - II

ADB Section


ANNEX - III

ADB Section


ANNEX - IV

ADB Section


ANNEX - V

environmental monitoring report · adb section bi annual report 2008 2nd half environmental impact...

Documents