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Environmental Monitoring Report
Semi-annual Report January 2019
Philippines: Angat Water Transmission Improvement
Project
Prepared by the Metropolitan Waterworks and Sewerage System for the Asian Development Bank.
This environmental monitoring report is a document of the borrower. The views expressed herein do not necessarily represent those of ADB's Board of Directors, Management, or staff, and may be preliminary in nature.
In preparing any country program or strategy, financing any project, or by making any designation of or reference to a particular territory or geographic area in this document, the Asian Development Bank does not intend to make any judgments as to the legal or other status of any territory or area.
Angat Water Transmission Improvement Project – Tunnel 4 Semi Annual Environmental Monitoring Report 4
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Environmental Monitoring Report
Semi Annual
December 2018
MWSS: ANGAT WATER TRANSMISSION IMPROVEMENT PROJECT
(AWTIP) Project Number: 46362-002
March 2019
Disclaimer:
This Semi-annual Environmental Report is a document of the borrower. The views expressed herein do not necessarily represent those of ADB’s Board of Directors, Management, or Staff, and may be preliminary in nature.
In preparing any country program or strategy, financing any project, or by making any designation of or reference to a particular territory or geographic area in this document, the Asian Development Bank does not intend to make any judgements as to the legal or other status of any territory or area.
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Contents
1 Introduction viii
Background 2
Project Data 4
Project Implementation Progress 4
Overall Progress as of 31 December 2018 4
Site Works / Activities for the Period (as of December 2018) 8
Contractors Resources 10
Site visits/inspections by the supervision consultant to monitor
compliance of the contractors and subcontractors 15
2 Compliance with ADB loan covenants and applicable government laws,
regulations and requirements 16
Status of compliance with government environmental requirements: 16
3 Changes in project scope 23
4 Summary of Environmental Mitigations and Compensation Measures
Implemented 24
Emission/Wastewater Discharge (Source) Monitoring Program (if relevant or
required in the EMP) 35
Summary of Monitoring 35
Assessment 38
Water Quality Monitoring Program 38
Summary of Water Quality Monitoring for Bigte and Ipo River (July to
December 2018) 38
Results of Bigte and Ipo River (July to December 2018) 38
Water Quality Results for Bigte River (July to December 2018) 42
Water Quality Results for Ipo River (July to December 2018) 64
Water quality in IDSSP 82
Assessment of Bigte River, Ipo River and IDSSP (July to December
2018) 85
Air and Noise Quality Monitoring Program 86
Summary of Air Quality Monitoring 86
Result of Ambient Air Quality Monitoring (September and November
2018) 88
Assesment3 for Air Quality Monitoring 91
Summary of Noise Quality Monitoring (July to December 2018) 91
Result of Noise Level Monitoring (September and November 2018) 92
Assesment3 for Noise Quality Monitoring (September and November
2018) 96
Summary of Sound Level Monitoring in General Construction Sites 96
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Assessment for Noise Quality Monitoring (July to December 2018) 114
Results of Tunnel Air Quality Monitoring 114
Assessment for Indoor Air Quality Monitoring (July to December 2018)
117
Spoil Management and Monitoring Program 117
Summary of Sediment Quality of Spoil/Excavated Materials 117
Results of Spoil Sediment Quality 119
Assessment for Sediment Quality of Spoil / Excavated Material 123
Freshwater Monitoring Program (Wet Season) 123
Terrestrial Ecology Monitoring 124
Wet Season 124
5 Key Environmental Issues 128
Key activities implemented 128
Key Issues Identified 128
6 Complaints 133
Details of Complaint/s 133
7 Conclusion and Recommendation 134
Overall Progress of Implementation of Environmental Management
Measures 134
8 Appendices 135
Site Works / Activities for the Period (July to November 2018) 135
Progress Photos (as of December 2018) 151
AWTIP Monitoring Matrix 159
Laboratory Results 177
Tree Cutting Permit 178
Terrestrial Ecology Monitoring Report 307
Related Documentation on Hazardous Materials 414
NCIP 425
Tunnel Geotechnical Profile 426
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List of Tables
Table 1. Contract Price for design and construction service ...........................................3
Table 2. Key information about the project ......................................................................4
Table 3. Key project progress ..........................................................................................4
Table 4. Workforce as of December 31, 2018 .............................................................. 10
Table 5. Filipino Workforce as of December 31, 2018 – by geographic location ......... 11
Table 6. Workforce as of December 31, 2018 – by Gender ......................................... 12
Table 7. Workforce as of December 31, 2018 – Dumagats ......................................... 12
Table 8. Workforce as of December 31, 2018– by Age Groups .................................. 13
Table 9. Staff requirement in the next 3 months .......................................................... 13
Table 10. Contractor: CMC di Ravenna ....................................................................... 14
Table 11. MAPOLCOM Construction ........................................................................... 14
Table 12. Trevi Foundation ........................................................................................... 14
Table 13. Don Vic Construction .................................................................................... 15
Table 14. Permits ......................................................................................................... 16
Table 15. Other Permits ............................................................................................. 19
Table 16. Safety Report as of December 31, 2018 ...................................................... 20
Table 17. Summary of Environmental Monitoring Programs Implemented .................. 33
Table 18. Water Quality of WTP effluent (July to December 2018 .............................. 36
Table 19. Bigte Creek Water Quality Sampling sites ................................................... 42
Table 20. Water Quality Results for SWB1 .................................................................. 45
Table 21. Water Quality Results for SWB2 .................................................................. 48
Table 22. Water Quality Results for SWB2A ................................................................ 51
Table 23. Water Quality Results for SWB3 .................................................................. 54
Table 24. Water Quality Results for SW3A .................................................................. 57
Table 25. Water Quality Results for SWSM1 ............................................................... 60
Table 26. Water Quality Results for SW2B .................................................................. 63
Table 27. Water Quality Sampling sites along Angat/ Ipo River .................................. 65
Table 28. Water Quality Results for SW IPO1 ............................................................. 68
Table 29. Water Quality Results for SW IPO2 ............................................................. 71
Table 30. Water Quality Results for SW IPO3 ............................................................. 74
Table 31. Water Quality Results for SW IPO4 ............................................................. 77
Table 32. Water Quality in IPO5 ................................................................................... 81
Table 33. Water Quality in IDSSP (Inside and Outside Curtain) .................................. 83
Table 34. Results of Ambient Air Quality Monitoring, September 2018 ....................... 89
Table 35. Ambient Air quality, November 2018 ............................................................ 90
Table 36. Noise level in Ipo Dam Compound, 2018 September .................................. 92
Table 37. Noise level in San Mateo Brgy. Hall, 2018 September ................................ 92
Table 38. Noise level in MWSS Bigte Compound, 2018 September ........................... 93
Table 39. Noise level in Ipo Dam Compound, 2018 November ................................... 94
Table 40. Noise level in San Mateo Brgy. Hall, 2018 November ................................. 95
Table 41. Noise level in MWSS Bigte Compound, 2018 November ............................ 95
Table 42. Sound levels in Bigte Construction Work Area 2018 July, morning ............. 97
Table 43. Sound levels in Ipo Construction Work Area 2018 July, evening (9:00 pm –
10:00 pm) .................................................................................................................... 100
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Table 44. Sound levels in Ipo Work Area – Sitio Ipo (Vicinity of Watershed Building,
across the Ipo Dam on 15 Aug 2018 (9:00 AM – 9:00 PM)........................................ 102
Table 45. Sound levels in Bigte Work Area – Portal Area (at tally room vicinity) on 15
Aug 2018 (9:00 AM – 8:00 PM) .................................................................................. 102
Table 46. Sound levels in Sitio Settling (about 100m from portal, MWSS Bigte) on 15
Aug 2018 (9:15AM to 8:45 PM) .................................................................................. 103
Table 47. Sound levels in Industrial Area (about 100m from portal, MWSS Bigte) on 15
Aug 2018 (9:30 AM to 8:30 PM) ................................................................................. 103
Table 48. Sound levels in Outside the Tippler Area (about 200m from portal, MWSS
Bigte on 15 Aug 2018 (10:00 AM to 9:00 PM) ............................................................ 104
Table 49. Sound levels in Bigte Construction Work Area 2018 October.................... 104
Table 50. Sound Level Monitoring, 30 November 2018 (6:00pm-9:00 pm) ............... 108
Table 51. Sound Level Monitoring, 1 December 2018 (6:00pm-9:00 pm) ................. 111
Table 52. Tunnel air quality monitoring (July to December 2018) .............................. 115
Table 53. Spoil/ Excavated Materials ......................................................................... 117
Table 54. Sediment Quality of Spoil/ excavated material ........................................... 120
Table 55. List of grievances as of December 2018 ................................................... 133
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List of Figures
Figure 1. Project Site .......................................................................................................3
Figure 2. TBM Location as of December 2018 ................................................................6
Figure 3. TBM Location and profile .................................................................................7
Figure 4. The sampling locations (Bigte and Ipo Rivers) .............................................. 39
Figure 5. Sampling points in Bigte River ...................................................................... 40
Figure 6. Sampling points in Ipo River.......................................................................... 41
Figure 7. Air quality monitoring sampling points ........................................................... 88
Figure 8. Excavated Material and TBM advancement ............................................... 118
Figure A-1. Shotcreting Sta. 0+520 to 0+540 (2nd layer).......................................... 151
Figure A-2. Drilling works for the Piezometer Sta. 0+760 .......................................... 152
Figure A-3. Installation of Piezometer at Sta. 0+775 .................................................. 152
Figure A-4. Restoration/ repair of silt curtain .............................................................. 153
Figure A-5. Drilling works for soil nails at Sta. 0+530 ................................................. 153
Figure A-6. Drilling works for soil nails at Sta. 0+865 ................................................. 154
Figure A-7. Shotcrete at Sta. 0 + 860 (2nd layer) ...................................................... 154
Figure A-8. Tunnel ring no. 4180 ................................................................................ 155
Figure A-9. Clearing and grubbing of grass and shrubs on the sides slopes of the railway
embankment along aqueduct ..................................................................................... 155
Figure A-10. Hauling of tunnel muck materials .......................................................... 156
Figure A-11. Loading of precast concrete segment lining on the train cars ............... 156
Figure A-12. Wagon Tippler in operation.................................................................... 157
Figure A-13. Construction of drainage canal and bund wall at the Tippler area ........ 157
Figure A-14. Precast Segments at Industrial stockyard area ..................................... 158
Figure A-15. Repair and maintenance of the wagon Tippler ...................................... 158
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Executive Summary
General
The Contractor, CMC di Ravenna, monitors its performance against the CEMMP
obligations. Because of this, it will record non-compliance where performance does not
meet the original obligations. In many cases this should not be taken to mean that the
outcomes are bad and where alternative courses of action have been adopted CMC and
MWSS has recorded this.
This report highlights prevailing issues about the project. Only obligations which are
assessed as in progress, non-compliant (in specification and time schedule), and not
applicable are presented in the body of the report. A full review of the CEMMP obligations
is presented in the CA matrix in excel format.
The layout of this report followed recommended ADB monitoring report structure.
Assessment of compliance
The following are the definition of remarks used to assess the CEMMP, EMP of IEE and
EIA and other environment related project documents.
(a) COMPLIANT – completed according to schedule and specifications in the CEMMP and other relevant ADB policies;
(b) NON-COMPLIANT – not completed according to schedule and specification and/or not according to specification;
(c) IN PROGRESS – partly compliant and pending for completion (d) NOT APPLICABLE – obligations not applicable to AWTIP project (e) CANNOT DOCUMENT COMPLIANCE – insufficient document or no document
provided to support assessment of compliance
A full review of the CEMMP and other relevant project documents on environment is presented in Appendix 8.3.
No grievance case reported in the period of July to December 2018.
Water quality monitoring and air quality monitoring are done by CRL Laboratories every month and quarterly, respectively. Portable Multi-meter and sound level meter were procured by CMC to do their own monitoring activities. Freshwater and terrestrial ecology monitoring are done during dry and wet seasons starting May 2018.
A water treatment facility is now operational to treat the tunnel’s effluent.
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1. Introduction
Background
The Angat Water Transmission Improvement Project (AWTIP) is part of a bigger scheme of modernization and improvement of the Metro Manila Water Distribution Network. Its main source of water is generated from the Angat watershed. This is supplemented by water which is fed through the Umiray tunnel that provides around 35% of the water for domestic use to Metro Manila and parts of adjacent 2 provinces. Currently, the delivery of water from Ipo dam basin to the Bigte sedimentation plant happens through 3 tunnels, 1 of which is quite obsolete. The progressive deterioration of the existing tunnels, or the occurrence of an earthquake (which is very likely since the area is close to two active faults), may seriously compromise the provision of water to millions of people.
The project is located in the province of Bulacan, at around 50 km north of Manila, close to Norzagaray, municipality of 150,000 inhabitants which hosts several important cement industries and which is easily accessible via highway or normal roads.
More than 95% of the water supply for Metro Manila comes from a single source: The Umiray–Angat– Ipo, or Angat system. Water from the Angat reservoir is conveyed through three parallel tunnels followed by six parallel aqueducts, to water treatment plants in Metro Manila. The treated water is then distributed to households, businesses, and industries in Metro Manila, and parts of Cavite and Rizal provinces. The transmission’s tunnel system which is about 75 years old, has not been assessed ever since. The earlier tunnels, tunnels 1 and 2 are not in compliance with current structural and seismic requirements. These factors could lead to serious interruptions of Metro Manila’s water supply. The proposed project will construct the urgently required fourth parallel tunnel. This new tunnel will not increase system capacity, but it will enable the rehabilitation or decommissioning of the upstream tunnels and downstream aqueducts.
The proposed project aims to (i) help restore the full design capacity of the Angat systems and thus ensure the sustainable provision of the water supply distribution system, and (ii) mitigate the risk of a total loss of water supply to Metro Manila and portions of Cavite and Rizal provinces. Both objectives are essential for the stable economic growth of Metro Manila and the Philippines. The government has asked the Asian Development Bank (ADB) to finance this investment. Figure 1 shows the general location of the project.
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Figure 1. Project Site
The Angat Water Transmission Project (AWTIP) is a design and build project consists of Design and Construction activities (Table 1):
Table 1. Contract Price for design and construction service
ITEM GRAND SUMMARY CONTRACT PRICE
1 Designs Services 93,516,701.06
2 Construction Devices 3,198,038,168.46
Grand Total for Design Services and Construction Service (1) + (2) Php 3,291,554,869.52
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Project Data
Table 2. Key information about the project
Project Name Angat Water Transmission Improvement Project
(AWTIP)
Components 6.4 km Tunnel Construction, Intake/Outlet
Structure, and Interconnection to Basin of
Aqueduct No. 5
Location Norzagaray, Ipo Dam to Bigte Basin
Duration 52 months (4 years and 4 months) Design Period =
6 months Construction Period = 46 months
Source of Fund Asian Development Bank (Loan 3377 PHI-AWTIP)
Contractor Cooperativa Muratori Cementisti di Ravenna (Italy)
Contractor’s Project Manager Mr. Salvatore La Valle
Project Manager/ CO for MWSS Jose D. Dorado Jr.
Consultant’s Project Manager Mr Choi Kihyung, DOHWA Engineering Co. Ltd.
Notice to Proceed (NTP) May 31, 2016
Actual Date of Start June 01, 2016
Target Completion September 07, 2020
Project Implementation Progress
Overall Progress as of 31 December 2018
Table 3. Key project progress
Description Actual (Previous
Month)
Actual (This
Month)
Actual (Cumulative)
Plan to Date
Variance to Date
S1 Design Services
2.84% 0.00% 2.84% 2.84% 0.00%
A-1 Site Facilities
1.89% 0.01% 1.90% 1.90% 0.00%
A-2 Inlet Works Including Cofferdam and Auxillary Mechanical Equipment
2.38% 0.02% 2.40% 2.34% 0.06%
A-4 Tunnel and Portals
73.52% 3.22% 76.74% 75.72% 1.02%
A-3 Outlet Works
0.61% 0.00% 0.61% 0.61% 0.00%
TOTAL 81.24% 3.25% 84.89% 83.41% 1.08%
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Tunnel
The total excavation by TBM is at 5,657 m as of December 31, 2018.
Total excavation progress/ TBM location (m) 5, 988
Previous TBM Excavation progress (starting 2018 Feb 13 until previous month), (m)
5,657
TBM Excavation progress in 2018 December, (m) 331
Average daily TBM excavation progress in 2018December, (m) 16 excavation days
20.69
Total number of rings installed, (no) 4, 610
Rings installation progress (starting 2018 Feb 13 until previous month), (No)
4,356
Rings installed in 2018 December 254
Average daily rings installed in 2018 December 15.88
Total excavated materials/ spoil (m3) 114, 781
Excavated materials (starting 2018 Feb 13 until previous month), (m3)
108, 437
Excavated materials in 2018 December, (m3) 6, 344
The TBM location and tunnel profile by December 2018 are shown in Figures 2 and 3, respectively.
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Figure 2. TBM Location as of December 2018
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Figure 3. TBM Location and profile
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Site Works / Activities for the Period (as of December 2018)
All of the project site facilities were completed in July 2017 and in continuous operation until this period. The accomplished site work / activities for the last month of the period are given below while the monthly accomplishments from July to November are provided in Appendix 8.1. Photo documentation of the project area and activities are presented in Appendix 8.2.
A. Inlet
Permanent Access Road
Works in the permanent access road area had resumed starting from the first week of October 2018. The following are the progress for the period:
• Concrete breaking and excavation works to the required elevation at Sta. 0+827 to Sta. 0+865.
• Casting of curbs and gutter at Sta. 0+660.
B. Structures along Permanent Access Road
• Soil nailing including grouting works from Sta. 0+827 to Sta. 0+865, and Sta. 0+530
• Drainage pipes installation from Sta. 0+827 to Sta. 0+865.
• Shotcreting works (1st and 2nd layer) on different locations / stations; from Sta. 0+595 to 621, Sta. 0+580 to 630, Sta. 0+660 to 675, and from Sta. 0+827 to 865.
• Fabrication and installation (restoration) of new silt curtain.
• Installation of piezometer at Sta. 0+760.
C. Outlet
Conveyance Channel and Drainage System
• Nothing to report for the period.
D. Tunnels and Portals
Site Works (Bigte Area) and TBM Preparatory Works
• Preparatory works completed.
Tunnel Excavation
TBM excavation progress the period was 331-m only compared to 800-m last month. This difference was mainly due to the positioning of the TBM prior to its waiting period for the breakthrough milestone date and partly because of yuletide season and New Year’s vacation. Despite this figure, tunneling works is still ahead of schedule by 1.23% (see progress summary below). The excavation works already reached Ch. 6+007.232 as of the end of the period which leaves to about 440-meters balance to excavate. On the other hand, the slope stabilization acceleration works is on steady progress which is forecasted to be completed on or even ahead (as per the current update) of the scheduled milestone on 08-May-2019.
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Major Works for the period:
• TBM excavation for the period is from Ch. 5+676.231 to Ch. 6+007.23 (a total of 331 m).
• Precast segment ring linings installed for the period is from ring no. 4356 to 4610.
• Pea gravel backfilled for the period is between ring nos. 4353 to 4607.
• Back-grouting works completed for the period from 1361 cu.m. to 1935.4 cu.m.
Progress Assessment for the Period:
Planned: 91.68 % Actual: 92.91 % Slippage: +1.23 % (ahead of schedule) Precast Concrete Lining Segments
To date, about 96% of the total number of ring segments had already been manufactured, wherein 95% were already delivered to the site. The manufactured number of segment lining for the period was 1140. The remaining segment to be manufactured is about 664 segments. E. Geological and Geotechnical Works 1. Tunnel Tunnel Face Mapping to the Excavated Area
• MAP-198 to 199 at Ch5+676.07 to Ch5+717.87, MAP-205 at Ch5+841.78 and MAP-209 at Ch5+983.67, light to dark greenish gray, coarse medium-grained aphanitic to basaltic texture of Andesite. The rock assemblage is mafic rich shows a high presence of dark silicate minerals. Observed joints are closely to widely-spaced joints filled with hard and soft minerals, semi undulating to steeped planar joint planes and has slightly rough to smooth roughness and has narrow to tight aperture. Fair-III to Good-II Rock Class with dry groundwater condition.
• MAP-200 to 201 at Ch5+763.34 to Ch5+776.08 and MAP-203 to MAP-204 at Ch5+816.94 to Ch5+831.32 and MAP-209 at Ch5+983.67, mottled dark to light greenish gray, medium-grained to agglomeratic texture of Tuff. The rock assemblage is mafic rich shows a high presence of dark silicate minerals. Observed joints are closely to widely-spaced, semi undulating to stepped planar joint planes and has slightly rough to smooth roughness and has narrow/gapped to tight aperture. The wall rock is intact with discontinuities. At Ch5+763.34, intercepted minor fault with thickness of ±0.80m infilled with gouge materials and broken tuff fragments. Fair-III to Good-II Rock Class with dry groundwater condition.
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• MAP-202 at Ch5+802.58, MAP-206 to MAP-208 at Ch5+958.85 and MAP-210 at Ch6+007.23, dark greenish gray, medium-grained to amygdaloidal texture of Basalt. The rock assemblage is mafic rich shows a high presence of dark silicate minerals. Observed joints are closely to widely-spaced, semi undulating to planar joint planes and has slightly rough to smooth roughness and has narrow/gapped to tight aperture infilled with hard and soft minerals. The wall rock is intact with discontinuities. Fair-III to Good-II Rock Class with dry groundwater condition.
Geological Probing Forecast ahead of the Tunnel Face
• PD-TBM-54 at Ch5+793.6 to Ch5+822.6 intercepted a Good-II to Fair-III class of Fresh sound to Fractured rock Basalt (GU1). The average penetration rate is 0.85 m/min.
• PD-TBM-55 at Ch5+832.8 to Ch5+861.8 intercepted a Good-II to Fair-III to Good-II class of Moderately strong to fresh sound strong Andesite (GU1). The average penetration rate is 0.73 m/min.
• PD-TBM-56 at Ch5+890.1 to Ch5+919.1 intercepted a Good-II to Fair-III to Good-II class of Fresh sound to Fractured rock Basalt (GU1). The average penetration rate is 0.80 m/min.
• PD-TBM-57 at Ch5+949.8 to Ch5+978.8 intercepted a Good-II to Fair-III to Good-II class of Fresh sound to Fractured rock Basalt (GU1). The average penetration rate is 0.96 m/min.
Geological Interpretation for Tunnel
The interpreted as-built geological section for one thousand five hundred to three thousand (1500 to 3000) meter excavation is in progress. Future Geotechnical Works
• Map digitization and manual plotting of latest tunnel face mapping data obtained during TBM excavation
• Database filling and data summary of new gathered information
• Convergence monitoring in the tunnel
Contractors Resources
(a) List of Production Construction Staff
Table 4. Workforce as of December 31, 2018
Entity Filipino Foreigner
TOTAL # % # %
CMC permanent staff 141 58% 21 9% 162
CMC contract workers / utilities
75 31% 0 0 75
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CMC consultants 2 1% 2 1% 4
SUB-CON Don Vic Construction (AWTIP/IDSSP)
79 100% 0 0% 79
Mapolcom 21 100% 0 0% 21
Morse Hydraulic 3 100% 0 0% 3
Trevi Foundations Philippines(AWTIP/IDSSP)
48 92% 4 8% 52
Bunzu Construction (Manpower Supply)
38 100% 0 0% 38
Fabrimetrics 11 100% 0 0% 11
Table 5. Filipino Workforce as of December 31, 2018 – by geographic location
Entity
Personnel employed from Brgy San Mateo
Personnel employed from Bgry Bigte
Personnel employed from other Bgrys in Norzagaray
Personnel employed from other municipalities/ cities in Bulacan
Personnel employed from other provinces TOTAL
# % # % # % # % # % CMC permanent staff
25 12% 33 15% 18 7% 32 13% 54 22% 162
CMC contract workers / utilities
15 6% 10 4% 12 5% 10 4% 28 12% 75
CMC consultants 0 % 0 % 0 % 0 % 4 1% 4
SUB-CON
Don Vic Construction (AWTIP/IDSSP)
75 95% 2 3% 1 1% 1 1% 0 0% 79
Mapolcom 2 10% 19 90% 0 0% 0 0% 0 0% 21
Morse Hydraulic 0 0% 0 0% 0 0% 0 0% 3 100% 3
Trevi Foundations Philippines(AWTIP/IDSSP)
7 13% 0 0% 0 0% 0 0% 45 87% 52
Fabrimetrics 1 8% 0 0% 0 0% 0 0% 10 92% 11
Bunzu Construction (Manpower Supply)
4 11 1 3 1 3 17 45 15 39 38
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Table 6. Workforce as of December 31, 2018 – by Gender
Entity Male Female
TOTAL # % # %
CMC permanent staff 139 58% 23 9% 162
CMC contract workers / utilities
71 29% 4 2% 75
CMC consultants 3 1% 1 1% 4
SUB-CON
Don Vic Construction (AWTIP/IDSSP)
70 89% 9 11% 79
Mapolcom 21 100% 0 0% 21
Morse Hydraulic 3 100% 0 0% 3
Trevi Foundations Philippines(AWTIP/IDSSP)
50 96% 2 4% 52
Bunzu Construction (Manpower Supply)
38 100% 0 0% 38
Fabrimetrics 11 100% 0 0% 11
Table 7. Workforce as of December 31, 2018 – Dumagats
Entity Male Female
TOTAL # % # %
CMC permanent staff 0 0% 0 0% 0
CMC contract workers / utilities
3 100% 0 0% 3
CMC consultants 0 0% 0 0% 0
SUB-CON
Don Vic Construction (AWTIP/IDSSP)
65 89% 8 11% 73
Mapolcom 0 0% 0 0% 0
Morse Hydraulic 0 0% 0 0% 0
Trevi Foundations Philippines(AWTIP/IDSSP)
7 100% 0 0% 6
Bunzu Construction (Manpower Supply)
4 100% 0 0% 4
Fabrimetrics 0 0% 0 0% 0
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The project implements environmental monitoring programs. Such monitoring surveys require local guides/ assistance. It should be noted that there is a total of 8 Dumagats from Ipo Dam site who assisted in River Ecology Monitoring (5 Dumagats) and Terrestrial Ecology Monitoring (3 Dumagats).
Table 8. Workforce as of December 31, 2018– by Age Groups
Entity 18-25 26-35 36-45 46-60 Over 60 TOTA
L # % # % # % # % # % CMC permanent staff
10 4% 60 25% 65 25% 25 10% 2 1% 162
CMC contract workers / utilities
23 10% 15 7% 17 7% 19 8% 1 1% 75
CMC consultants 0 0% 0 0% 1 1% 3 1% 0 0% 4
SUB-CON Don Vic Construction (AWTIP/IDSSP)
14 18% 32 41% 28 35% 5 6% 0 0% 79
Mapolcom 11 52% 5 24% 5 24% 0 0% 0 0% 21
Morse Hydraulic 1 33% 2 67% 0 0% 0 0% 0 0% 3
Trevi Foundations Philippines(AWTIP/IDSSP)
17 33% 16 31% 9 17% 10 19% 0 0% 52
Bunzu Construction (Manpower Supply)
8 21% 10 26% 18 47% 2 5% 0 0% 38
Fabrimetrics 0 0% 8 62% 5 38% 0 0% 0 0% 13
(b) Recruitment
Table 9. Staff requirement in the next 3 months
No. of Required
Plant Engineer 1
Yard Foreman 1
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(c) List of Equipment
Table 10. Contractor: CMC di Ravenna
Item Quantity
Generator Set 7 Air Compressor 5 Telescopic Handler 1 Forklift 12 Backhoe Ladder 6 Welding Machine 3 Tower Light 1 Dropside Vehicle 4 Locomotive 2 High Pressure Washer 3 Submersible Pump 1 60 Ton Crane 1 65 Ton Crane (Rental) 1 Mini Backhoe 1 High Bed Trailer 2 Grouting Plant 1 Wheel Excavator 1 Vibratory Compactor 1 One Bagger Mixer 2 Man Lift Truck 1 Shotcrete Machine 2 Mini Dump Truck 1 Backhoe with Breaker 1 Dump Truck 1 TOTAL 51
Table 11. MAPOLCOM Construction
Item Quantity
Loader 1 Dump Truck 6 TOTAL 7
Table 12. Trevi Foundation
Item Quantity
SM 400 1 Cometria Pump 1 Air Compressor 1 Generator 1 Grouting Machine 1 Compressed Air Tank 1 SM 103 1 Service Vehicle/Truck 1
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Item Quantity
Tower Light 1 SM 14 1 TOTAL 10
Table 13. Don Vic Construction
Item Quantity
Loader 1 Dump Truck 6 TOTAL 7
Site visits/inspections by the supervision consultant to monitor compliance of the
contractors and subcontractors
The construction supervision consultants, DOHWA Engineering Co., Ltd., have been commissioned by MWSS. The consultants started in September 2018. The DOHWA has an International and National Environment Specialists for the environmental supervision of the project. The National Environment Specialist or together with the International Environment Specialist is conducting at least two (2) days per week monitoring of compliance with the mitigation measures specified in the EMP. Ocular inspection of the work areas, the activities of contractors and subcontractors, and the operation of installed structures and/or facilities for mitigation measures are conducted to verify the compliance. Any lapses or noncompliance noted during the site inspection is directly communicated to the concerned contractor or subcontractors for immediate implementation of corrective actions.
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2. Compliance with ADB loan covenants and
applicable government laws, regulations and
requirements
Status of compliance with government environmental requirements:
Tables 14 and 15 present the permits acquired for the project. Copies of the permits are in Appendices 8.5 and 8.7 of this report.
Table 14. Permits Environmental
Laws Permits Date of Issue/ remarks Expiry Date
P.D. 984 (Pollution Control Law)
A/C No. (Authority to Construct) -
Please refer to Section 3 (k) of Republic Act 6234, as amended, allows the MWSS “to construct work across , over, through and/or alongside any stream, watercourse, canal, ditch, flume, street, avenue, highway or railway, whether public or private as the location of said works may require; X X X the system is hereby given the right-of-way to locate, construct, and maintain such works over and throughout the lands, including any street, avenue or highway owned by the Republic of the Philippines, or any of its branches, or political subdivisions, and is given right of immediate entry and to prosecute any undertaking thereon without any further requirement or restriction other than due notice to the office or entity concerned X X X”
PO No. (Permit to Operate) -
Please see row on RA 8749 (Phil Clean Air Act) of this table
PD 1586 (Establishing EIS System)
ECC1 (Environmental Compliance Certificate)
ECC -CO-1508-0022 7 May 2017.
The certificate shall cover the following: 1. construction of water tunnel #4 with
6.4 kilometer length and 4 m diameter from Ipo Dam, Barangay San Mateo to Barangay Bigte, with associated facilities such as Contractor’s Work areas, Spoil Disposal Sites as enumerated in the EIS
2. Repair and rehabilitation works of Tunnel Nos 1,2,3
3. Water transmission operations of Tunnels No 1,2,3 and 4 for an aggregate water flow of up to 43 m3/sec
-
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Environmental Laws
Permits Date of Issue/ remarks Expiry Date
4. Fencing of the Right-of- way ECC2 Not applicable. No change in project
ECC3 Not applicable. No change in project
RA 6969 (Toxic Substances and Hazardous and Nuclear Waste)
DENR Registry ID GR-R3-14-01197 CCO Registry (Chemical Control Order)
Not applicable.
Importer Clearance No
Not applicable.
Permit to Transport
PTT-R3-14-01368 06 August 2018
2018 Feb 06
P.D 984 (water Pollution)
Discharge Permit Discharge Permit No. DP-18K-03BU-2381-R
2019 November 30
RA 8749 (Phil Clean Air Act)
A/C No.
PO No.1
FLA- 17J-03BU-549 (1-unit 40KW Standby GenSet) 2017 October 20 Certificate of final electrical inspection was given to CMC by the LGU Norzagaray for the 50KVA (control number 28787) Genset for temporary power. date issued on 10 August 2018
2018 October 30
PO No.2
FLA- 17J-03BU-550 (1-unit 20KW Standby GenSet) 2017 October 20 Certificate of final electrical inspection was given to CMC by the LGU Norzagaray for the 25KVA (control number 28789) Genset for temporary power. date issued on 10 August 2018
2018 October 30
PO No. 3
FLA-18J-03BU-550 (1-unit 20KW Standby Genset) 2018 September 17 Certificate of final electrical inspection was given to CMC by the LGU Norzagaray for the 25KVA (control number 28789) Genset for temporary power. Date issued on 10 August 2018 (see MPR 2018 Sept, Append 1)
2019 October 30
PO No. 4
FLA-18J-03BU-549 (1-unit 40KW Standby Genset) 2018 September 17 Certificate of final electrical inspection was given to CMC by the LGU Norzagaray for the 50KVA (control number 28787) Genset for temporary power. Date issued on 10 August 2018 (see MPR 2018 Sept, Append 1)
2019 October 30
P.O No. 5 FLA-18H-03BU-825 (1-unit 100KW Temporary Diesel Genset) 2019 August 02
2019 August 30
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Environmental Laws
Permits Date of Issue/ remarks Expiry Date
Certificate of final electrical inspection was given to CMC by the LGU Norzagaray for the 125KVA (control number 28790) Genset for temporary power. Date issued on 2018 August 10 (see MPR 2018 Sept, Append 1)
P.O No. 6
FLA-18G-03BU-815 (1-unit 80KW Temporary Diesel Genset) Certificate of final electrical inspection was given to CMC by the LGU Norzagaray for the 100KVA (control number 28788) Genset for temporary power. Date issued on 2018 August 10 (see MPR 2018 Sept, Append 1)
2019 July 30
PD 705 (The Forestry Reform Code Of The Philippines)
Tree Cutting Permit
Tree cutting permit dated September 23, 2016 (10 assorted tree species in Bigte) issued by CENRO Tabang
September 30, 2016
Tree cutting permit dated October 5, 2016 (38 mixed trees in Brgy San Mateo and Bigte) issued by MENRO Norzagaray
October 20, 2016
Tree cutting permit dated November 10, 2016 (10 assorted fruit tree species in Bigte) issued by CENRO Tabang
November 25, 2016
Tree cutting permit dated March 16, 2017 (10 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang
March 31, 2017
Tree cutting permit dated April 3, 2017 (10 assorterd fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang
April 18, 2017
Tree cutting permit dated April 21, 2017 (10 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang
May 6, 2017
Tree cutting permit dated March 20, 2017 (50 trees in Brgy San Mateo and Bigte) issued by MENRO Norzagaray
April 4, 2017
Tree cutting permit dated January 29, 2018 (20 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang
February 14, 2018
Tree cutting permit dated February 1, 2018 (10 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang
February 16, 2018
Tree cutting permit dated February 26, 2018 (15 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang
March 13, 2018
Tree cutting permit dated March 13, 2018 (25 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang
April 13, 2018
Tree cutting permit dated November 26, 2018 (4 fruit bearing trees/
Dec 3, 2018
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Environmental Laws
Permits Date of Issue/ remarks Expiry Date
miscellaneous species) issued by CENRO Guiguinto
The acquired tree cutting permits allowed the project to cut a total of 208 assorted trees within the project construction area. To date, the project only cut a total of 172 trees; on which the replacement seedlings should be about 17,200 seedlings. RADSI and Briquettors Association of the Philippines were contracted to provide a total of 25,000 replacement seedlings (see MPR 2018 Sept., Appendix 2).
CMC already requested document showing receipt of replacement seedlings from DENR. To date, CMC secured the acknowledgement of the 8,500-seedling replacement (CENRO acknowledgement dated 10 July 2018); 13,800 seedlings (CENRO acknowledgement dated 7 September 2018) from Community Environment and Natural Resources Office –Guiguinto, Bulacan (see MPR 2018 Sept., Appendix 2); and 2,700 assorting seedlings of forest trees (CENRO acknowledgement dated 26 November 2018) from Community Environment and Natural Resources Office –Guiguinto, Bulacan (see MPR 2018 Nov., Appendix 2).
Table 15. Other Permits
Permits Date of Issue/ remarks Expiry Date Remarks
Land use Permit issued by NPC
Land use permit (2017 –LUP-03) dated 14 July 2017 was issued by NPC to MWSS
25 years (Approx. July 2042)
Garbage Hauling and Disposal
May 30, 2017 December 30, 2017
expired and renewed
January 1, 2018 December 30, 2018
Mayor’s Permit Permit number: 2017-0722 Date of Issue: June 5, 2017
December 31, 2017 Expired and renewed
Permit number: 2018-0126 Date of Issue: January 11, 2018
December 31, 2018
Excavation/slope stabilization Permit
Permit number: 2017-11-0090 November 29, 2017
Storage Building Permit BP #2017-11-0091 November 29, 2017
PCO Accreditation – Hector Veloso
29 September 2017 29 September 2020
Demolition Permit (Permit to demolish pedestrian bridge of the Old Ipo Dam watch tower)
22 March 2018
Building Permit No 2018- 03-0001 Applied at the Municipality of Norzagaray on 22 March 2018 Name of proponent to be amended from MWSS/ CMC to MWSS/ CMC/ Maynilad/ Manila Water Target date: week 1 July 2018
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Permits Date of Issue/ remarks Expiry Date Remarks
Free and Prior Informed Consent (FPIC)
In progress. 2017 08 17-18 Field based investigation by NCIP 2018 0804 First Community Assembly 2018 0829 second community assembly 2018 0914 Consensus Building. However postponed. 2018 1009 scheduled Concensus Building however postponed by NCIP. 2018 1218 new schedule of concensus Building
Table 16. Safety Report as of December 31, 2018 Previous This Period To Date
Average Manpower 336 -25 311
CMC di Ravenna 265 -12 253
Sub-contractor 71 -13 58
Safe Man-hours 1,396,516.00 94,534.00 1,491,050.00
CMC di Ravenna 750,475.00 75,520.00 825,995.00
Sun-contractor 646,041.00 19,014.00 665,055.00
Major Incidents1 0 0 0
Minor Incidents2 3 0 3
Slight Incidents 10 0 10
Activity Previous This Period To Date
Incidents / Cases
Vehicle Incidents3 8 0 8
1 Major Incidents – defined as an acute incident such as major discharge/emission or a fire/explosion, which immediately or
subsequently causes several serious injuries and/or fatalities, serious harm to environment and/or loss of substantial material assets.
2 Minor Incidents – an accident that causes minor damage. 3 Vehicle Incidents – when a motor vehicle strikes or collides another vehicle, a stationary object, a pedestrian, or an animal
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Previous This Period To Date
Near Misses4 19 0 19
First-Aid Cases5 10 0 10
Medical Treatment Cases6 2 1 3
Restricted Work Cases7 0 0 0
Lost-Time Cases8 - - -
Nurse Consultation 1,427 90 1,517
Meeting/s
No. of Safety Meetings 39 8 47
No. of Toolbox Meetings 712 88 800
No. of People Inducted/Oriented
916 14 930
No. of Safety Observations 319 28 347
No. of Inspection Audits 215 10 225
Training Activity/ies and Number of Participants
Hand and power tools 13 0 13
Personal Protective Equipment (PPE)
47 0 47
Fire Prevention 116 0 116
Ladder Safety 66 0 66
Confined Space 163 0 163
Working at Heights 31 0 31
First Aid and CPR 40 0 40
Emergency and Evacuation Drill
5 0 5
Defensive Driving 26 0 26
Electrical Safety 35 0 35
Hazardous Materials Handling 8 0 8
No. of People Trained (Disaster awareness and
management) 113
0
113
No. of People Trained (Self Resuscitator)
42 0 42
Refuge Chamber 23 0 23
Self-Contained Breathing Apparatus
21 0 21
Total number of people trained 773 0 773
4 Near Misses – unplanned event that has the potential to cause, but does not actually result in human injury, environmental or equipment damage, or an interruption of normal operation. 5 First Aid Cases – workers injury cases administered immediately after the injury occurs at the location where it occurred. 6 Medical Treatment Cases – recordable incident involving injury or illness that has required management and care of the patient
above and beyond first aid, but not severe enough to be a reportable fatality or lost work day case or restricted work day case. 7 Restricted Work Cases – when a person is so injured that they cannot perform their normal duties. Therefore they are transferred
temporarily to some other jobs (light duties). 8 Lost-Time Cases – refer to the number of lost-time injuries within a given accounting period, relative to the total number of hours
worked in that period.
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Previous This Period To Date
No. of Emergency and Evacuation Drill 5 0 5
Number of Trainings Conducted 16 0 16
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2 Changes in project scope
No change in project scope.
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3 Summary of Environmental Mitigations and Compensation Measures
Implemented
The contractor, CMC di Ravenna, monitors its performance against contractual obligations stated in various project documents such as the CEMMP, Employer’s Requirement Document, and Environmental Compliance Certificate, IEE among others. This section of the report highlights major measures implemented and prevailing issues about the project. Only obligations which are assessed as in progress, non-compliant (in specification and time schedule), and not applicable are presented in the body of the report
A full review of the CEMMP, IEE, and other obligations is presented in the compliance matrix in Appendix 8.3 of this report. Below are the summary of mitigation measures on prevailing issues and Table 17 presented the major monitoring programs implemented.
Environmental Aspect
Potential Impact Possible Approach/ Mitigating Measures
Compliance Status
Remarks
Physical
(Land)
Environment
Soil and Erosion due to: · soil disturbance · vegetation clearing
Protect slopes with any one or combination of bonded fiber matrices, erosion control blankets, silt fence, fiber rolls, and keeping stormwater off the slopes through diversion channels and/or berms.
Compliant Ipo Contractor’s Work Area
The project site in Ipo is characterized by steep slopes of transported materials and loose soil. With this area condition, slopes along some sections of the road have been installed with threaded rock bolts/ soil nails. Slope stabilization permit for Ipo Construction Site has been obtained in November 2017 and slope stabilization works is almost complete.
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Environmental Aspect
Potential Impact Possible Approach/ Mitigating Measures
Compliance Status
Remarks
Silt curtains have already been installed in May 2018
Slope protection at Ipo Contractor’s Work Area.
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Environmental Aspect
Potential Impact Possible Approach/ Mitigating Measures
Compliance Status
Remarks
Bigte Contractor’s Work Area
Geocomposite steel mesh with anchor bolts has been installed at the portals; geotextile are installed in the slopes along the railway going to tippler area and at the tippler area.
Tippler Area and Geotextile along the railway
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Environmental Aspect
Potential Impact Possible Approach/ Mitigating Measures
Compliance Status
Remarks
Water Impact on surface water quality due to/ from: · Contaminants from materials used and construction activities and processes · Siltation from soil erosion, spoil disposal area, dewatering excavations, etc · Water quality Deterioration of water quality in Ipo Dam and Bigte river Tributary during construction
At the active work sites Mitigating contaminants · Provide adequate sanitation facilities and water supply at work sites and workers’ camp. Enforce observance of good sanitation practices by workers.
Compliant Portalets are provided in all construction sites. Construction of office facilities includes septic tanks at the CMC Office.
Construction of septic tank of CMC Office Water purification tanks to provide drinking water are installed at the CMC Office in Bigte and workers' camp/ accommodation at Villa Antonio (in San Jose del Monte, Bulacan). All other workers' apartments are provided with AC rooms, domestic water supply, and drinking water, among others.
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Environmental Aspect
Potential Impact Possible Approach/ Mitigating Measures
Compliance Status
Remarks
Water treatment facility for drinking water Subcontractors have separate portalets and water supply (drinking and domestic) for their workers. Water treatment plant at Industrial area is already constructed in May 2018.
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Environmental Aspect
Potential Impact Possible Approach/ Mitigating Measures
Compliance Status
Remarks
Water Treatment Plant in Bigte High coliform was reported in segment of surface water where there are communities along the riverbanks. Although, the construction camp is near the riverbank, portalets has been provided.
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Environmental Aspect
Potential Impact Possible Approach/ Mitigating Measures
Compliance Status
Remarks
Portalets provided at construction sites
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Environmental Aspect
Potential Impact Possible Approach/ Mitigating Measures
Compliance Status
Remarks
Sedimentation ponds in Ipo; and Bigte prior to treatment of water to WTP Construction area at the inlet is a steep slope. No spillage reported in July 2017-December 2018 Monthly water quality monitoring is being done by CRL Laboratories with the following parameters: temperature, pH, electric conductivity, turbidity, color, TDS, ORP, dissolved oxygen, BOD, coliform (total and fecal) and heavy metals (See sampling location and results on the report).
Water b) lowering of water level of wells in nearby
Monitor for potential groundwater depletion in existing wells in the vicinity.
Not Applicable
There were no water cell/ aquifer traversed by the TBM during tunnel excavation along the alignment which is characterized to have community above ground. Action is deemed not needed.
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Environmental Aspect
Potential Impact Possible Approach/ Mitigating Measures
Compliance Status
Remarks
communities due to tunneling, pumping/extracting of tunnel drainage water
Provide interim measures to avoid disrupting water supply to affected households. Investigate for proper corrective action.
Water Impact on surface water quality due to/ from: · Contaminants from materials used and construction activities and processes · Siltation from soil erosion, spoil disposal area, dewatering excavations, etc · Water quality Deterioration of water quality in Ipo Dam and Bigte river Tributary during construction
· Mitigating sedimentation Build diaphragm wall when building inlet structure
Not Applicable
In the construction of the inlet structure, diaphragm wall plan will be built. Design drawings submitted to MWSS. (Drawing Code: S-A-06-O-ST-SE-04-A; Sheet Contents: Variant Inlet Works, Intake Structures, Diaphragm wall – Plan, sections and setting out point)
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Table 17. Summary of Environmental Monitoring Programs Implemented
EMP Requirement (list all mitigation
measures specified in the
EMP/CEMP/SEMP)
Compliance Attained
Location
Comment on Reasons for Partial or Non-Compliance
Required Action and Target Dates to Achieve Compliance
1. Water Quality Monitoring
Compliant Ipo and Bigte River
Parial Compliance. Activity still ongoing. Visual monitoring through photograph and Video documentation. Water quality sampling is conducted monthly for surface water and water treatment plant by CRL Laboratories. The parameters for the surface water are the following: Temperature, pH, electric conductivity, tubidity, color, TDS, ORP, dissolved oxygen, BOD, coliform (Total and Fecal) and heavy metals (See sampling location and results on the report). Water samples from Basin 2, the source of water supply for TBM, has also been collected and analyzed last December 2017 with the following parameters: temperature, TSS, electric conductivity, turbidity, color and TDS.
Schedule of surface water quality monitoring:
• July 10 , 2018 • August 23, 2018 • Sept 20, 2018 • November 6-8, 2018 • December 4, 2018
Schedule of effluent monitoring:
• July 10 , 2018 • August 7-9, 2018 • September 11, 2018 • October 9, 2018 • November 6-8, 2018 • December 4, 2018
2. Air quality monitoring
Compliant Ambient air quality monitoring is conducted quarterly by CRL Laboratories.
A sound level meter was procured by CMC to monitor the noise level during construction period as one of the requirements of ADB and DENR. Noise monitoring started on 28 October 2017.
Schedule of Air Quality Monitoring:
• September 25-28, 2018 • November 19-21, 2018
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EMP Requirement (list all mitigation
measures specified in the
EMP/CEMP/SEMP)
Compliance Attained
Location
Comment on Reasons for Partial or Non-Compliance
Required Action and Target Dates to Achieve Compliance
3. Freshwater ecology monitoring
Compliant Freshwater ecology monitoring is done during wet and dry seasons.
• June 10-15, 2018 • September 20-23, 2018
5. Social and environmental awareness
Partial Residences near construction area and tunnel ROW
Bulletin boards for IEC purpose were installed in the barangay halls of Brgys. Bigte and San Mateo on June 19-20, 2017. FPIC process is in progress. MMT was already formed. CMC is funding MMT meetings. MMT meetings held: - Sept. 13, 2018 - Nov. 13, 2018 - provisional date of next meeting is Feb. 12, 2019
IEC is a continuous activity by updating the project bulletin boards installed in Brgys. Bigte and San Mateo Barangay Halls; Ipo Elementary School.
6. Public Health and safety
Compliant Health and safety staff are hired. Detailed grievance procedure was formulated in July 2017.
Applicable measures implemented.
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Emission/Wastewater Discharge (Source) Monitoring Program (if relevant or required in
the EMP)
Summary of Monitoring
A water treatment plant (WTP) is operational since May 2018.
The effluent samples were collected from July to December 2018 from the effluent of WTP. The results of the laboratory analysis of the samples are compared to effluent standards in DAO 2016-08 (Table 18).
Water samples from Bigte Creek after the discharge point was also collected in October 2018. The results of the laboratory analysis of the samples are compared to surface water standards in DAO 2016-08.
The sampling locations for water quality monitoring are indicated in Figs. 4 to 6. The photo-documentation and summary of results are provided in Tables 19 to 26 while the laboratory analysis is shown in Appendix 8.4.
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Table 18. Water Quality of WTP effluent (July to December 2018
Parameter (Class B DAO 2016-
08, Effluent
Standards)
Reference Unit July 18, 2018
August 23, 2018
September 20, 2018
October 16, 2018
November 6, 2018
December 18, 2018
Physical Characteristics
Temp (°C change)9 3 DAO 2016-08 °C 0.9 4.8 3.2 0.2 1.1 0.3 TSS 85 DAO 2016-08 mg/L 9 12 71 9 16 11
Color 100 DAO 2016-08 TCU 5 5 8
5 5 5
pH 6.0-9.0 DAO 2016-08 7.2 8.2 9.2 7.3 8.3 7.3
Inorganic and nonmetallic constituents
Nitrogen (as NO ¯) 14 DAO 2016-08 mg/L 0.2 0.4 0.9 0.4 0.1 <0.02
organic and biological
constituents
Ammonia 0.5 DAO 2016-08 mg/L 0.2 0.3 0.2 0.8 0.2 <0.003 Oil and Grease 5 DAO 2016-08 mg/L 0.7 1.5 1.0 0.5 0.7 0.7
Elements
Arsenic (As) 0.02 DAO 2016-08 mg/L <0.008 <0.008 <0.008 <0.008 <0.008 <0.008
Cadmium (Cd) 0.006 DAO 2016-08 mg/L <0.001 <0.001 <0.001 <0.001 <0.001 <0.001
Chromium Hexavalent
0.02 DAO 2016-08 mg/L <0.005 <0.005 <0.005 <0.005 <0.005 <0.005
Dissolved Copper (Cu)
0.04 DAO 2016-08 mg/L <0.003 <0.003 <0.003 <0.003 <0.003 <0.003
9 General Effluent Standard values for temperature is the temperature difference of the background value and discharge point.
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Parameter (Class B DAO 2016-
08, Effluent
Standards)
Reference Unit July 18, 2018
August 23, 2018
September 20, 2018
October 16, 2018
November 6, 2018
December 18, 2018
Lead (Pb) 0.02 DAO 2016-08 mg/L <0.005 <0.005 <0.0005 <0.005 <0.005 <0.005
Manganese (Mn) 2 DAO 2016-08 mg/L 0.03 0.06 0.0006 <0.003 <0.003 0.01
Mercury (Hg) 0.002 DAO 2016-08 mg/L - <0.00002 <0.00002 <0.0002 <0.0002 <0.0002
Nickel (Ni) 0.2 DAO 2016-08 mg/L <0.003 <0.003 <0.003 <0.003 <0.003 <0.003
Zinc (Zn) 4 DAO 2016-08 mg/L 0.02 0.009 0.007 <0.005 0.005 <0.005
BTEX
Benzene 0.1 DAO 2016-08 mg/L ND ND - - - ND
Toluene 5 DAO 2016-08 mg/L ND ND - - - ND
Ethyl Benzene 1.5 DAO 2016-08 mg/L ND ND - - - ND
m/p-Xylene 5 DAO 2016-08 mg/L ND ND - - - ND
o-Xylene 5 DAO 2016-08 mg/L ND ND - - -
TPH
TPH as GRO (Gasoline Range Organics, C6-C10
100 DAO 2016-08 mg/L ND ND ND ND ND ND
TPH C10-C14 100 DAO 2016 mg/L - - - ND ND -
TPH C15-C28 100 DAO 2016 mg/L - - - ND ND - TPH C29-36 100 DAO 2016 mg/L - - - - - -
ND = not detected or below the method detection limit of the analysis/test
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Assessment10
The water quality result for effluent of the WTP from July to December 2018 are within the General Effluent Standards except for the temperature and pH in August and September 2018. This exceedance may be attributed to the level of purification of the effluent. The test for BTEX, heavy metals and TPH Gasoline Range Organics, C6-C10 and related parameters are reported below the detection limit.
On the other hand, results of water quality of river after discharge point shows that all related parameters are reported within allowable limit and below the detection limit except for ammonia.
Water Quality Monitoring Program
Summary of Water Quality Monitoring for Bigte and Ipo River (July to December
2018)
Freshwater quality sampling in Angat River and Bigte Creek are done monthly by CRL laboratories.
The Angat Upper Reach between Angat Dam and Ipo Dam is classified as Class B fresh surface water11. Water samples were collected by grab sampling technique from four sampling points from 5 km upstream of Ipo Dam to 0.8 km downstream. On the other hand, Bigte Creek is not yet classified but it is also assumed to be Class B to ensure optimal use of water since bathing is observed in some sections of the creek.
Results of Bigte and Ipo River (July to December 2018)
Below are sampling points and complete laboratory results of the water quality samples collected from July to December 2018. Measures in red are parameters with exceedances according to DAO 2016-08. The results of July to October 2018 were compared with the 2013 wet season baseline while November 2018 results were compared with the 2014 dry season baseline.
10 Discharge levels should be compared to the relevant discharge standards and/or performance indicators noted in the EMP. Any
exceedances should be highlighted for attention and follow-up. In addition, discharge levels could be compared to baseline conditions (if baseline data is available) and described in qualitative terms or be evaluated based on a ranking system, such as the following:
1. Very Good (overall conditions are generally improved) 2. Good (conditions are maintained or slightly improved) 3. Fair (conditions are unchanged) 4. Poor (conditions are moderately degraded) 5. Very Poor (conditions are significantly degraded)
Additional explanatory comments should be provided as necessary. 11Angat River Upper Reach is classified as Class B river as listed in the List of classified rivers (2004). This classification is based on DAO 1990-34 and now
superseded by DAO 2018-08. The description of surface water classification is the same in both DAOs. Hence for comparison to standards, the water quality results will be compared to Class B for which Angat River is classified.
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Figure 4. The sampling locations (Bigte and Ipo Rivers)
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Figure 5. Sampling points in Bigte River
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Figure 6. Sampling points in Ipo River
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Water Quality Results for Bigte River (July to December 2018)
Table 19. Bigte Creek Water Quality Sampling sites
Code /
General
Location
Photo Sampling Date/
remarks
SWB1
(SW1 in EIA
Nov 2016)
Bigte Creek
near the outlet.
Bigte Creek
near the basin
2 in Bigte
Portal.
N14° 51.538’
E121° 05.453’
2018 July 11
2018 August 23
2018 Sept20
2018 Oct 9
2018 Nov 6
2018 Dec 18
SWB2
(SW3 in EIA
Nov 2016)
Bigte Creek,
within the
Salonga
Property. The
site near Sitio
Settling
N14° 51.526
E121° 05.330’
2018 July 11
2018 August 23
2018 Sept20
2018 Oct 9
2018 Nov 6
2018 Dec 18
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Code /
General
Location
Photo Sampling Date/
remarks
SWB2 A
Bigte Creek,
within the
Salonga
Property. The
site near
culvert at Sitio
Settling
2018 July 11
2018 August 23
2018 Sept 20
2018 Oct 9
2018 Nov 6
2018 Dec 18
SWB3
Bigte Creek.
Sampling site is
near the
Minuyan bridge
N14° 51.404’
E121° 05.193
2018 July 11
2018 Aug 23
2018 Sept 20
2018 Oct 9
2018 Nov 6
2018 Dec 18
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
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Code /
General
Location
Photo Sampling Date/
remarks
SWSM1
(Sta.MARIA 03
in EIA
November
2016)
In Sta.Maria
River,
within the
vicinity of San
Jose Bridge
N14° 50.123’
E121° 04.47’1’
2018 July 11
2018 August 23
2018 Sept20
2018 Oct 9
2018 Nov 6
2018 Dec 18
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
45
Table 20. Water Quality Results for SWB1 Parameter Adopted
Criteria (Class B
DAO 2016-08)
Reference SW BIGTE1/SWB1 Bigte Creek near the basin 2 in Bigte Portal. This site is near the outlet.
N14° 51.538’ E121° 05.453’
Year/ quarter 2013 WET
(May to October)
2014 DRY (Novemb
er to April)
July 11, 2018
Aug. 23,
2018
Sept. 20, 2018
Nov. 6, 2018
Physical Characteristics
Temp (°C) 26-30 DAO 2016-08 27.4 27.5 28 27.3 27.4 25
Salinity (%) b - parameter not included in DAO 90-34
14.62 13.91 8.2 8.1 8.2 9.0
TSS 65 DAO 2016-08 130.5 130.5 - - - 314
Electric Cond. (mS/cm) b
- parameter not included in DAO 2016-08
228.5 217.3 223 246 270 8
Turbidity (NTU) b 20 EP (Water Quality) Policy 2003, ANZECC
5.66 5.26 40 17 9.4 15
Colour (Apparent, PCU)
50 DAO 2016-08, class B 15 15 60 20 20 183
TDS - parameter not included inDAO 2016-08
146.9 12 133 144 155 8
pH 6.50-8.50 DAO 2016-08 8.7 7.93 8.1 8.3 8.2
Inorganic and nonmetallic constituents
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
46
Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SW BIGTE1/SWB1 Bigte Creek near the basin 2 in Bigte Portal. This site is near the outlet.
N14° 51.538’ E121° 05.453’
Total Nitrogen
DAO 2016-08 - - 5.7 5.4 8.4 1.9
Nitrogen (as NO ¯) a 7 DAO 2016-08 0.1 0.02 0.4 0.1 0.5 0.6
Oxidation Reduction Potential ORP (mV)
- parameter not included in DAO 2016-08
195 217.2 520 360 269 332
Phosphorus (as PO ³¯) 0.5 DAO 2016-08 0.03 0.4 0.1 0.1 0.2 0.2
organic and biological constituents
Dissolved Oxygen 5 (minimum)
DAO 2016-08 14.4 4.21 9 8 8 9
BOD5 5 DAO 2016-08 1 1 1 1 1 2
COD b - parameter not included in DAO 2016-08
20 9.8 11 5 12 14
Faecal Coliform (MPN/100mL) b
100 DAO 2016-08 54,000 1,700
4600 24000 3500 790
Total Coliform (MPN/100mL)
- parameter not included in DAO 2016-08
92,000 16,000
35000 24000 3500 3,500
Oil and Grease 1 DAO 2016-08 0.5 0.4 0.8 0.9 0.56 0.8
Elements
Antimony (Sb) - parameter not included in
DAO 2016-08 <0.001 <0.001 <0.008 <0.008 <0.008 <0.008
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
47
Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SW BIGTE1/SWB1 Bigte Creek near the basin 2 in Bigte Portal. This site is near the outlet.
N14° 51.538’ E121° 05.453’
Arsenic (As) 0.01 DAO 2016-08 <0.01 <0.01 <0.01 <0.01 <0.01 <0.008
Cadmium (Cd) 0.003 DAO 2016-08 <0.006 <0.006 <0.003 <0.003 <0.003 <0.001
Chromium (hexavalent, Cr(VI))
0.01 DAO 2016-08 <0.003 <0.003 - - - -
Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 <0.01 <0.02 <0.02 <0.003
Lead (Pb) 0.01 DAO 2016-08 <0.04 <0.05 - <0.005 <0.005 <0.005
Manganese (Mn) 0.2 DAO 2016-08 0.01 0.1 - - - -
Mercury (Hg) 0.001 DAO 2016-08 <0.0001 <0.0001 <0.0002 <0.0002 <0.0002 <0.0002
Nickel (Ni) 0.04 DAO 2016-08 <0.03 <0.03 <0.03 <0.03 <0.03 <0.003
Vanadium (V) - parameter not included in DAO 2016-08
<1.0 <1.0 0.01 0.01 0.01 0.01
Zinc (Zn) 2 DAO 2016-08 <0.02 <0.02 - 0.01 0.006 0.008
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
48
Table 21. Water Quality Results for SWB2 Parameter Adopted
Criteria (Class B
DAO 2016-08)
Reference SW03/SWB2 Bigte Creek, within the Salonga Property. The site near Sitio Settling
N14° 51.526 E121° 05.330’
Year/ quarter 2013 WET (May to October)
2014 DRY (November to April)
July 11, 2018
Aug. 23, 2018
Sept. 20, 2018
Nov. 6, 2018
Physical Characteristics
Temp (°C) 26-30 DAO 2016-08 27 27.10 32.2 27.1 26.5 -
Salinity (%) b - parameter not included in DAO 90-34
14.06 12.16 9.0 8.1 4.9 -
TSS 65 DAO 2016-08 - 12 - - - -
Electric Cond. (mS/cm) b
- parameter not included in DAO 2016-08
219.7 190.0 222 233 220 -
Turbidity (NTU) b 20 EP (Water Quality) Policy 2003, ANZECC
12.8 24.10 45 17 20 -
Colour (Apparent, PCU)
50 DAO 2016-08, class B 20 10 60 20 15 -
TDS - parameter not included inDAO 2016-08
141.1 120.40 133 138 122 -
pH 6.50-8.50 DAO 2016-08 8.33 8.12 7.7 8.3 8 -
Inorganic and nonmetallic constituents
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
49
Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SW03/SWB2 Bigte Creek, within the Salonga Property. The site near Sitio Settling
N14° 51.526 E121° 05.330’
Total Nitrogen
DAO 2016-08 -
5.7 2.7 8.7 -
Nitrogen (as NO ¯) a 7 DAO 2016-08 0.02 0.02 0.4 0.08 0.8 -
Oxidation Reduction Potential ORP (mV)
- parameter not included in DAO 2016-08
82.00 82 525 378 287 -
Phosphorus (as PO ³¯) 0.5 DAO 2016-08 0.01 0.01 0.1 0.1 0.1 -
organic and biological constituents
Dissolved Oxygen 5 (minimum) DAO 2016-08 22.5 8.18 7 8 7 -
BOD5 5 DAO 2016-08 1 1 1 1 1 -
COD b - parameter not included in DAO 2016-08
9.8 9.8 9.5 16 11 -
Faecal Coliform (MPN/100mL) b
100 DAO 2016-08 9,200 1,700
4,600
24,000
2,400
-
Total Coliform (MPN/100mL)
- parameter not included in DAO 2016-08
92,000 16,000
35,000
24,000
2,400
-
Oil and Grease 1 DAO 2016-08 0.3 0.4 1.1 0.8 <0.41 -
Elements
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
50
Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SW03/SWB2 Bigte Creek, within the Salonga Property. The site near Sitio Settling
N14° 51.526 E121° 05.330’
Antimony (Sb) - parameter not included in DAO 2016-08
<0.001 <0.001 0.008 0.008 0.008 -
Arsenic (As) 0.01 DAO 2016-08 <0.01 <0.01 <0.01 <0.01 <0.01 -
Cadmium (Cd) 0.003 DAO 2016-08 <0.006 <0.006 <0.003 <0.003 <0.003 -
Chromium (hexavalent, Cr(VI))
0.01 DAO 2016-08 <0.003 <0.003 - - - -
Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 <0.01 <0.02 <0.02 -
Lead (Pb) 0.01 DAO 2016-08 <0.05 <0.05 - <0.005 <0.005 -
Manganese (Mn) 0.2 DAO 2016-08 0.07 0.2 - - - -
Mercury (Hg) 0.001 DAO 2016-08 <0.0001 <0.0001 <0.0002 <0.0002 <0.0002 -
Nickel (Ni) 0.04 DAO 2016-08 <0.03 <0.03 0.08 <0.03 <0.03 -
Vanadium (V) - parameter not included in DAO 2016-08
<1.0 <1.0 0.01 0.01 0.01 -
Zinc (Zn) 2 DAO 2016-08 <0.02 <0.02 0.01 0.01 -
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
51
Table 22. Water Quality Results for SWB2A Parameter Adopted
Criteria (Class B
DAO 2016-08)
Reference SWB2A Water Quality of Bigte Creek in the section drains out from construction
site
Year/ quarter 2013 WET
(May to October)
2014 DRY (Novemb
er to April)
July 11, 2018
Aug. 23,
2018
Sept. 20, 2018
Nov. 6, 2018
Physical Characteristics
Temp (°C) 26-30 DAO 2016-08 - 27.10 27.5 26.6 27.4 24.3
Salinity (%) b - parameter not included in DAO 90-34
- 12.16 5.8 5.7 8.2 4.9
TSS 65 DAO 2016-08 - 12 - - - -
Electric Cond. (mS/cm) b
- parameter not included in DAO 2016-08
- 190.0 205 216 270 180
Turbidity (NTU) b 20 EP (Water Quality) Policy 2003, ANZECC
- 24.10 23 30 9.4 16
Colour (Apparent, PCU)
50 DAO 2016-08, class B - 10 25 20 20 10
TDS - parameter not included inDAO 2016-08
- 120.40 120 124 155 104
pH 6.50-8.50 DAO 2016-08 - 8.12 7.8 8 8.2 8
Inorganic and nonmetallic constituents
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
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Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SWB2A Water Quality of Bigte Creek in the section drains out from construction
site
Total Nitrogen
DAO 2016-08
5.8 2.6 8.4 5.5
Nitrogen (as NO ¯) a 7 DAO 2016-08 - 0.02 0.5 <0.02 0.5 0.2
Oxidation Reduction Potential ORP (mV)
- parameter not included in DAO 2016-08
- 82 547 496 269 344
Phosphorus (as PO ³¯) 0.5 DAO 2016-08 - 0.01 0.08 0.1 0.2 0.05
organic and biological constituents
Dissolved Oxygen 5 (minimum)
DAO 2016-08 - 8.18 8 8 8 9
BOD5 5 DAO 2016-08 - 1 1 1 1 2
COD b - parameter not included in DAO 2016-08
- 9.8 16 9.8 12 15
Faecal Coliform (MPN/100mL) b
100 DAO 2016-08 - 1,700 2400 4300 3500 5400
Total Coliform (MPN/100mL)
- parameter not included in DAO 2016-08
- 16,000 5400 24000 3500 16000
Oil and Grease 1 DAO 2016-08 - 0.4 0.9 0.6 0.56 0.9
Elements
Antimony (Sb) - parameter not included in DAO 2016-08
- <0.001 <0.008 <0.008 <0.008 <0.008
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
53
Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SWB2A Water Quality of Bigte Creek in the section drains out from construction
site
Arsenic (As) 0.01 DAO 2016-08 - <0.01 <0.01 <0.01 <0.01 <0.008
Cadmium (Cd) 0.003 DAO 2016-08 - <0.006 <0.003 <0.003 <0.003 <0.001
Chromium (hexavalent, Cr(VI))
0.01 DAO 2016-08 - <0.003 - - - -
Copper (Cu) 0.02 DAO 2016-08 - <0.02 <0.01 <0.02 <0.02 <0.003
Lead (Pb) 0.01 DAO 2016-08 - <0.05 - <0.005 <0.005 <0.005
Manganese (Mn) 0.2 DAO 2016-08 - 0.2 - - - -
Mercury (Hg) 0.001 DAO 2016-08 - <0.0001 <0.0002 <0.0002 <0.0002 <0.0002
Nickel (Ni) 0.04 DAO 2016-08 - <0.03 <0.03 <0.03 <0.03 <0.003
Vanadium (V) - parameter not included in DAO 2016-08
- <1.0 0.1 0.01 0.01 0.008
Zinc (Zn) 2 DAO 2016-08 - <0.02 0.4 0.02 0.006 0.01
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
54
Table 23. Water Quality Results for SWB3 Parameter Adopted
Criteria (Class B
DAO 2016-08)
Reference SWB3 Baltazar bridge. This is the bridge pass the Barangay Bigte Hall
N14° 51.272’ E121° 05.144’
Year/ quarter 2013 WET
(May to October)
2014 DRY (November to April)
July 11, 2018
Aug. 23,
2018
Sept. 20, 2018
Nov. 6, 2018
Physical Characteristics
Temp (°C) 26-30 DAO 2016-08
28.20 -
28.4 - 26.5 25.4
Salinity (%) b - parameter not included in DAO 90-34 - -
11 - 9 9
TSS 65 DAO 2016-08
- -
- - - -
Electric Cond. (mS/cm) b
- parameter not included in DAO 2016-08 376.00 -
419 - 420 225
Turbidity (NTU) b 20 EP (Water Quality) Policy 2003, ANZECC 25.40 -
55 - 11 50
Colour (Apparent, PCU)
50 DAO 2016-08, class B
-
25 - 15 10
TDS - parameter not included inDAO 2016-08 244.80 -
254 - 263 130
pH 6.50-8.50 DAO 2016-08
7.94 -
7.8 - 8 8
Inorganic and nonmetallic constituents
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
55
Parameter Adopted Criteria
(Class B DAO
2016-08)
Reference SWB3 Baltazar bridge. This is the bridge pass the Barangay Bigte Hall
N14° 51.272’ E121° 05.144’
Total Nitrogen
DAO 2016-08
12 - 8.5 7.1
Nitrogen (as NO ¯) a 7 DAO 2016-08
- -
1.2 - 0.5 0.5
Oxidation Reduction Potential ORP (mV)
- parameter not included in DAO 2016-08 251.00 -
- 281 404 366
Phosphorus (as PO ³¯) 0.5 DAO 2016-08
- -
- 0.1 0.1 0.1
organic and biological constituents
Dissolved Oxygen 5 (minimum)
DAO 2016-08
- -
8 - 8 8
BOD5 5 DAO 2016-08
- -
1 - 1 1
COD b - parameter not included in DAO 2016-08 - -
7.5 - 13 15
Faecal Coliform (MPN/100mL) b
100 DAO 2016-08
- -
16000 - 11000 1,700
Total Coliform (MPN/100mL)
- parameter not included in DAO 2016-08 - -
24000 - 11000 9,200
Oil and Grease 1 DAO 2016-08
- -
0.8 - 0.67 1.1
Elements
-
Antimony (Sb) - parameter not included in DAO 2016-08 - -
<0.008 - <0.008 <0.008
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
56
Parameter Adopted Criteria
(Class B DAO
2016-08)
Reference SWB3 Baltazar bridge. This is the bridge pass the Barangay Bigte Hall
N14° 51.272’ E121° 05.144’
Arsenic (As) 0.01 DAO 2016-08
- -
<0.01 - <0.01 <0.008
Cadmium (Cd) 0.003 DAO 2016-08
- -
<0.003 - <0.003 <0.001
Chromium (hexavalent, Cr(VI))
0.01 DAO 2016-08
- -
- - - -
Copper (Cu) 0.02 DAO 2016-08
- -
<0.01 - <0.02 <0.003
Lead (Pb) 0.01 DAO 2016-08
- -
- - <0.005 <0.005
Manganese (Mn) 0.2 DAO 2016-08
- -
- - - -
Mercury (Hg) 0.001 DAO 2016-08
- -
<0.0002 - <0.0002 <0.0002
Nickel (Ni) 0.04 DAO 2016-08
- -
<0.03 - <0.03 <0.0003
Vanadium (V) - parameter not included in DAO 2016-08 - -
0.01 - 0.01 0.01
Zinc (Zn) 2 DAO 2016-08
- -
0.04 - 0.008 0.01
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
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Table 24. Water Quality Results for SW3A Parameter Adopted
Criteria (Class B
DAO 2016-08)
Reference SWB3A Water Quality near Minuyan Bridge
Year/ quarter 2013 WET
(May to October)
2014 DRY (Novemb
er to April)
July 11, 2018
Aug. 23,
2018
Sept. 20, 2018
Nov. 6, 2018
Physical Characteristics
Temp (°C) 26-30 DAO 2016-08 28.20 - 27.5 26.6 23.3 28.7
Salinity (%) b - parameter not included in DAO 90-34
- - 5.8 5.7 6.5 8.1
TSS 65 DAO 2016-08 - - - - -
Electric Cond. (mS/cm) b
- parameter not included in DAO 2016-08
376.00 - 205 216 256 622
Turbidity (NTU) b 20 EP (Water Quality) Policy 2003, ANZECC
25.40 - 23 30 13 2.4
Colour (Apparent, PCU)
50 DAO 2016-08, class B - 25 20 15 8
TDS - parameter not included inDAO 2016-08
244.80 - 120 124 149 376
pH 6.50-8.50 DAO 2016-08 7.94 - 7.8 8 8 7.5
Inorganic and nonmetallic constituents
Total Nitrogen
DAO 2016-08 - 5.8 2.6 8.7 4.5
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
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Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SWB3A Water Quality near Minuyan Bridge
Nitrogen (as NO ¯) a 7 DAO 2016-08 - - 0.5 <0.02 0.8 0.5
Oxidation Reduction Potential ORP (mV)
- parameter not included in DAO 2016-08
251.00 - 547 496 296 352
Phosphorus (as PO ³¯) 0.5 DAO 2016-08 - - 0.08 0.1 0.1 0.09
organic and biological constituents
- -
Dissolved Oxygen 5 (minimum)
DAO 2016-08 - - 8 8 7 7
BOD5 5 DAO 2016-08 - - 1 1 1 1
COD b - parameter not included in DAO 2016-08
- - 16 9.8 6.9 17
Faecal Coliform (MPN/100mL) b
100 DAO 2016-08 - - 2400 4300 5400 240,000
Total Coliform (MPN/100mL)
- parameter not included in DAO 2016-08
- - 5400 24000 5400 240,000
Oil and Grease 1 DAO 2016-08 - - 0.9 0.6 0.44 0.5
Elements
Antimony (Sb) - parameter not included in DAO 2016-08
- - <0.008 <0.008 <0.008 0.008
Arsenic (As) 0.01 DAO 2016-08 - - <0.01 <0.01 <0.01 0.008
Cadmium (Cd) 0.003 DAO 2016-08 - - <0.003 <0.003 <0.003 <0.001
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
59
Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SWB3A Water Quality near Minuyan Bridge
Chromium (hexavalent, Cr(VI))
0.01 DAO 2016-08 - - - - - -
Copper (Cu) 0.02 DAO 2016-08 - - <0.01 <0.02 <0.02 <0.003
Lead (Pb) 0.01 DAO 2016-08 - - - <0.005 <0.005 <0.005
Manganese (Mn) 0.2 DAO 2016-08 - - - - - -
Mercury (Hg) 0.001 DAO 2016-08 - - <0.0002 <0.0002 <0.0002 <0.0002
Nickel (Ni) 0.04 DAO 2016-08 - - <0.03 <0.03 <0.03 <0.003
Vanadium (V) - parameter not included in DAO 2016-08
- 0.1 0.01 0.01 0.006
Zinc (Zn) 2 DAO 2016-08 - - 0.4 0.02 <0.005 <0.005
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
2018 July to December
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Table 25. Water Quality Results for SWSM1 Parameter Adopted
Criteria (Class B
DAO 2016-08)
Reference Sta.MARIA 03/SWSM1 In Sta.Maria River,
within the vicinity of San Jose Bridge N14° 50.123’ E121° 04.47’1’
Year/ quarter
2013 WET
(May to October)
2014 DRY (Novemb
er to April)
July 11, 2018
Aug. 23,
2018
Sept. 20, 2018
Nov. 6, 2018
Physical Characteristics
Temp (°C) 26-30 DAO 2016-08 27.30 32.30 28.6 28 27.8 25.2
Salinity (%) b - parameter not included in DAO 90-34
15.74 12 6.5 13 15
TSS 65 DAO 2016-08 657.00 32.00 - - - -
Electric Cond. (mS/cm) b
- parameter not included in DAO 2016-08
246.00 450.80 300 247 310 390
Turbidity (NTU) b 20 EP (Water Quality) Policy 2003, ANZECC
51.40 12.10 65 35 26 3.7
Colour (Apparent, PCU)
50 DAO 2016-08, class B 500.00 25 25 15 15
TDS - parameter not included inDAO 2016-08
158.00 292.50 179 142 188 234
pH 6.50-8.50 DAO 2016-08 8.20 7.64
7.5 7.7 7.7 7.8
Inorganic and nonmetallic constituents
Total Nitrogen
DAO 2016-08 0.10 0.60
8.9 8.3 11 5.2
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Nitrogen (as NO ¯) a 7 DAO 2016-08
0.9 0.2 0.6 1.1
Oxidation Reduction Potential ORP (mV)
- parameter not included in DAO 2016-08
187.00 156.00
547 493 286 313
Phosphorus (as PO ³¯) 0.5 DAO 2016-08 0.70 0.30
0.2 0.1 0.2 0.3
organic and biological constituents
Dissolved Oxygen 5 (minimum)
DAO 2016-08 not measured
2.07
7 8 7 8
BOD5 5 DAO 2016-08 14.00
1.00
3 4 4 2
COD b - parameter not included in DAO 2016-08
49.00
49.00
15 9.3 21 18
Faecal Coliform (MPN/100mL) b
100 DAO 2016-08 920,000.0
0
31,000.00
35,000
54,000
16,000 54,000
Total Coliform (MPN/100mL)
- parameter not included in DAO 2016-08
920,000.0
0
31,000.00
54,000
54,000
16,000 54,000
Oil and Grease 1 DAO 2016-08 <0.3 0.70
0.7 1.1 0.44 0.4
Elements
Antimony (Sb) - parameter not included in DAO 2016-08
<0.001 <0.001 <0.008 <0.008 <0.008 <0.008
Arsenic (As) 0.01 DAO 2016-08 <0.01 <0.01 <0.01 <0.01 <0.01 <0.008
Cadmium (Cd) 0.003 DAO 2016-08 <0.006 <0.006 <0.003 <0.003 <0.003 <0.001
Chromium (hexavalent, Cr(VI))
0.01 DAO 2016-08 <0.003 <0.003 - - - -
Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 <0.01 <0.02 <0.02 <0.003
AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4
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Lead (Pb) 0.01 DAO 2016-08 <0.04 <0.04 - <0.005 <0.005 <0.005
Manganese (Mn) 0.2 DAO 2016-08 0.40 0.5 - - - -
Mercury (Hg) 0.001 DAO 2016-08 <0.0001 <0.0001 <0.0002 <0.0002 <0.0002 <0.0002
Nickel (Ni) 0.04 DAO 2016-08 <0.01 <0.01 <0.03 <0.03 <0.03 <0.003
Vanadium (V) - parameter not included in DAO 2016-08
<1.0 <1.0 0.01 0.01 0.01 0.01
Zinc (Zn) 2 DAO 2016-08 0.10 <0.02 - 0.02 0.007 0.05
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2018 July to December
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Table 26. Water Quality Results for SW2B Parameter Adopted
Criteria Unit Reference Wet
(May to October 2013)
Aug 23, 2018
Physical Characteristics
Temp 26-30 °C DAO 2016-08, class B;
32.3 27.3
Salinity - % parameter not included in DAO 2016-08
8.1
TSS 65 mg/L DAO 2016-08, class B
32 -
Electric Conductivity (EC)
- µS/cm parameter not included in DAO 2016-08;
450.8 384
Turbidity 20 NTU EP (Water Quality) Policy 2003, ANZECC
12.1 17
Colour 50 TCU parameter not included in DAO 2016-08
15
TDS - mg/L parameter not included in DAO 2016-08
292.5 225
pH 6.50-8.50 DAO 2016-08, class B
7.64 7.8
Inorganic and nonmetallic constituents
Total Nitrogen - mg/L parameter not included in DAO 2016-08
- 5.3
Nitrogen (as NO ¯) a
7 mg/L DAO 2016-08, class B
0.6 0.08
Oxidation- Reduction Potential (ORP)
- mV parameter not included in DAO 2016-08
156 524
Phosphorus (as PO ³¯)
0.5 mg/L DAO 2016-08, class B
0.3 0.1
organic and biological constituents
Dissolved Oxygen
5 mg/L DAO 2016-08, class B
2.07 7
BOD5 5 mg/L DAO 2016-08, class B
1 1
COD b - mg/L parameter not included in DAO 2016-08
49 5.8
Faecal Coliform 100 MPN/100mL
DAO 2016-08, class B
31000 16,000
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Parameter Adopted Criteria
Unit Reference Wet (May to October 2013)
Aug 23, 2018
Total Coliform - MPN/100mL
parameter not included in DAO 2016-08
31000 16,000
Oil and Grease 1 mg/L DAO 2016-08, class B
0.7 3
Elements
Antimony (Sb) - mg/L parameter not included in DAO 2016-08
<0.001 <0.0008
Arsenic (As) 0.01 mg/L DAO 2016-08 <0.01 <0.01
Cadmium (Cd) 0.003 mg/L DAO 2016-08 <0.006 <0.003
Chromium (hexavalent, Cr(VI))
0.01 mg/L DAO 2016-08 <0.003 -
Copper (Cu) 0.02 mg/L DAO 2016-08 <0.02 <0.02
Lead (Pb) 0.01 mg/L DAO 2016-08 <0.04 <0.005
Manganese (Mn)
0.2 mg/L DAO 2016-08 0.5 -
Mercury (Hg) 0.001 mg/L DAO 2016-08 <0.0001 <0.0002
Nickel (Ni) 0.04 mg/L DAO 2016-08 <0.01 <0.03
Vanadium (V) 0.075 mg/L WHO <1.0 0.01
Zinc (Zn) 2 mg/L DAO 2016-08 <0.02 0.01
Water Quality Results for Ipo River (July to December 2018)
The location of sampling stations for Ipo River within the period of July to December 2018 are shown in Table 27.
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Table 27. Water Quality Sampling sites along Angat/ Ipo River
Code/ General Location
Photos Remarks
SW IPO 1
(IPO US2 in EIA Nov 2016)
Sapang Anginan and Angat River confluence
N 14 53 26.09
E 121 9 59.59
Water quality sampling was done
on 6 Nov 2018
SW IPO 2
(IPO 4 in EIA Nov 2016)
Near confluence of Sapang Munti
and Angat River
N14° 52’ 22.3”
E121° 10’ 05.6”
Water quality sampling was done
on 6 Nov 2018
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SW IPO3 (IPO2 in EIA Nov 2016)
Between the old Ipo Dam structure and
intakes of existing tunnels
1,2,3
N14° 52’ 26.9”
E121° 10’ 56.5
Water quality sampling was done
on 6 Nov 2018
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SW IPO4
(IPO DS2 in EIA Nov 2016)
~ 350m downstream of
Ipo Dam
N14° 52’ 36.8” E121° 10’ 42.3”
Water quality sampling was done
on 6 Nov 2018
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Tables 28 to 32 indicated the results of Angat River water quality monitoring for July to December 2018 while the laboratory analysis is shown in Appendix 8.4.
Table 28. Water Quality Results for SW IPO1 Parameter Adopted
Criteria (Class B
DAO 2016-08)
Reference IPO SW1/
IPO US2 in EIA 2016 confluence of Sapang Anginan and Angat River
Year/ quarter 2013 WET
(May to October)
2014 DRY (Novemb
er to April)
July 11, 2018
Aug. 23,
2018
Sept. 20, 2018
Nov. 6, 2018
Physical Characteristics
Temp (°C) 26-30 DAO 2016-08 28.6 30.2 - - 23.2 22.4
Salinity (%) - parameter not included in DAO 90-34
9.97 9.96 - - 4.9 3.3
TSS 65 DAO 2016-08 4 7.0 - - - -
Electric Cond. (mS/cm) - parameter not included in DAO 2016-08
155.8 155.6 - - 142 143
Turbidity (NTU) 20 EP (Water Quality) Policy 2003, ANZECC
4.61 4.9 - - 23 3.7
Colour (Apparent, PCU)
50 DAO 2016-08, class B 10 5 - - 10 8
TDS - parameter not included inDAO 2016-08
100.30 92.71 - - 81 83
pH 6.50-8.50 DAO 2016-08 8.93 7.92 - - 7.9 7.5
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Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference IPO SW1/
IPO US2 in EIA 2016 confluence of Sapang Anginan and Angat River
Inorganic and nonmetallic constituents
Total Nitrogen
DAO 2016-08 95.26 - - - 10 288
Nitrogen (as NO ¯) 7 DAO 2016-08 - <0.02 - - 1.0 6.9
Oxidation Reduction Potential ORP (mV)
- parameter not included in DAO 2016-08
<0.02 219 - - 320 0.3
Phosphorus (as PO ³¯) 0.5 DAO 2016-08 <0.006 <0.006 - - 0.04 0.01
organic and biological constituents
Dissolved Oxygen 5 (minimum)
DAO 2016-08 8.89 8.90 - - 9 9
BOD5 5 DAO 2016-08 1 1 - - <1 1
COD - parameter not included in DAO 2016-08
15 9.9 - - 6.4 17
Faecal Coliform (MPN/100mL)
100 DAO 2016-08 13 17
- - 94 45
Total Coliform (MPN/100mL)
- parameter not included in DAO 2016-08
49 110
- - 920 1300
Oil and Grease 1 DAO 2016-08 15 0.04 - 0.55 0.5
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Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference IPO SW1/
IPO US2 in EIA 2016 confluence of Sapang Anginan and Angat River
Elements
-
Antimony (Sb) - parameter not included in DAO 2016-08
<0.001 <0.001 - - <0.008 <0.008
Arsenic (As) 0.01 DAO 2016-08 <0.01 <0.01 - - <0.01 <0.008
Cadmium (Cd) 0.003 DAO 2016-08 <0.006 <0.006 - - <0.003 <0.001
Chromium (hexavalent, Cr(VI))
0.01 DAO 2016-08 - <0.003 - - -
Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 - - <0.02 <0.003
Lead (Pb) 0.01 DAO 2016-08 <0.05 <0.05 - - <0.005 <0.005
Manganese (Mn) 0.2 DAO 2016-08 0.06 <0.0001 - - - -
Mercury (Hg) 0.001 DAO 2016-08 <0.0001 0.05 - - <0.0002 <0.0002
Nickel (Ni) 0.04 DAO 2016-08 <0.03 <0.0001 - - <0.03 <0.003
Vanadium (V) - parameter not included in DAO 2016-08
<1.0 <0.03 - - 0.008 0.006
Zinc (Zn) 2 DAO 2016-08 <0.02 <1.0 - - 0.009 0.006
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Table 29. Water Quality Results for SW IPO2 Parameter Adopted
Criteria (Class B
DAO 2016-08)
Reference IPO 2/
IPO 4 in EIA Nov 2016) Near confluence of Sapang Munti and Angat River
N14° 52’ 22.3” E121° 10’ 05.6
Year/ quarter 2013 WET
(May to October)
2014 DRY (Novemb
er to April)
July 11, 2018
Aug. 23,
2018
Sept. 20, 2018
Nov. 6, 2018
Physical Characteristics
Temp (°C) 26-30 DAO 2016-08 30.2 28.6 28.3 26.3 25.5 26.6
Salinity (%) - parameter not included in DAO 90-34
9.96 9.97 4.1 3.2 6.5 3.3
TSS 65 DAO 2016-08
4 - - - -
Electric Cond. (mS/cm) - parameter not included in DAO 2016-08
7.0 155.8 153 145 162 170
Turbidity (NTU) 20 EP (Water Quality) Policy 2003, ANZECC
155.6 4.61 2.9 37 30 3.4
Colour (Apparent, PCU)
50 DAO 2016-08, class B 4.9 10 8 20 10 8
TDS - parameter not included inDAO 2016-08
5 100.30 90 82 91 99
pH 6.50-8.50 DAO 2016-08 92.71 8.93 7.4 7.8 7.6 7.4
Inorganic and nonmetallic constituents
7.92
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Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference IPO 2/
IPO 4 in EIA Nov 2016) Near confluence of Sapang Munti and Angat River
N14° 52’ 22.3” E121° 10’ 05.6
Total Nitrogen
DAO 2016-08
- 13 2.7 9.9 8.0
Nitrogen (as NO ¯) 7 DAO 2016-08 219 <0.02 0.9 0.05 0.6 0.1
Oxidation Reduction Potential ORP (mV)
- parameter not included in DAO 2016-08
95.26 370 371 306 316
Phosphorus (as PO ³¯) 0.5 DAO 2016-08 <0.02
0.2 0.04 0.04 <0.01
organic and biological constituents
Dissolved Oxygen 5 (minimum)
DAO 2016-08 8.89 9 8
BOD5 5 DAO 2016-08 8.90 1 2 1 1 1
COD - parameter not included in DAO 2016-08
1 15 12 5.4 8.4 12
Faecal Coliform (MPN/100mL)
100 DAO 2016-08 9.9 13 78 3500 3500 170
Total Coliform (MPN/100mL)
- parameter not included in DAO 2016-08
17
49 230 9200 3500 2400
Oil and Grease 1 DAO 2016-08 110
15 0.9 0.6 <0.471 0.7
Elements
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Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference IPO 2/
IPO 4 in EIA Nov 2016) Near confluence of Sapang Munti and Angat River
N14° 52’ 22.3” E121° 10’ 05.6
Antimony (Sb) - parameter not included in DAO 2016-08
0.04 <0.001 <0.008 <0.008 <0.008 <0.008
Arsenic (As) 0.01 DAO 2016-08 <0.001 <0.01 <0.01 <0.01 <0.01 <0.008
Cadmium (Cd) 0.003 DAO 2016-08 <0.01 <0.006 <0.003 <0.003 <0.003 <0.001
Chromium (hexavalent, Cr(VI))
0.01 DAO 2016-08 <0.006 <0.003 - - -
Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 <0.01 <0.02 <0.02 <0.003
Lead (Pb) 0.01 DAO 2016-08 <0.05 <0.05 - <0.005 <0.005 <0.003
Manganese (Mn) 0.2 DAO 2016-08 <0.0001 0.06 - - - -
Mercury (Hg) 0.001 DAO 2016-08 0.05 <0.0001 <0.0002 <0.0002 <0.0002 <0.0002
Nickel (Ni) 0.04 DAO 2016-08 <0.0001 <0.03 <0.03 <0.03 <0.03 <0.003
Vanadium (V) - parameter not included in DAO 2016-08
<0.03 <1.0 <0.005 0.01 0.008 0.007
Zinc (Zn) 2 DAO 2016-08 <1.0 - 0.03 0.02 0.009 <0.005
Bromide
DAO 2016-08 2.60
- - - -
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Table 30. Water Quality Results for SW IPO3 Parameter Adopted
Criteria (Class B
DAO 2016-08)
Reference SW IPO 3 (IPO2 in EIA Nov 2016)
Between the old Ipo Dam structure and intakes of existing tunnels 1,2,3 N14° 52’ 26.9” E121° 10’ 56.5
Year/ quarter
2013 WET
(May to October)
2014 DRY (Novemb
er to April)
July 11, 2018
Aug. 23,
2018
Sept. 20, 2018
Nov. 6, 2018
Physical Characteristics
Temp (°C) 26-30 DAO 2016-08 28.5 28.5 28 26.4 21.8 18.6
Salinity (%) - parameter not included in DAO 90-34
10.00 10.00 3.3 3.2 4.1 3.3
TSS 65 DAO 2016-08 11 11 8 - - -
Electric Cond. (mS/cm) - parameter not included in DAO 2016-08
156.3 156.3 153 147 165 143
Turbidity (NTU) 20 EP (Water Quality) Policy 2003, ANZECC
4.68 4.68 3 32 12 4.2
Colour (Apparent, PCU)
50 DAO 2016-08, class B 10.00 10.00 8 10 8 8
TDS - parameter not included inDAO 2016-08
97.3 97.3 88 83 97 81
pH 6.50-8.50 DAO 2016-08 8.50 8.50 7.4 7.4 7.7 7.5
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Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SW IPO 3 (IPO2 in EIA Nov 2016)
Between the old Ipo Dam structure and intakes of existing tunnels 1,2,3 N14° 52’ 26.9” E121° 10’ 56.5
Inorganic and nonmetallic constituents
Total Nitrogen
DAO 2016-08 -
8 7.9 17 8.2
Nitrogen (as NO ¯) 7 DAO 2016-08 <0.02 <0.02 0.08 <0.02 0.9 0.2
Oxidation Reduction Potential ORP (mV)
- parameter not included in DAO 2016-08
166 166 389 359 269 312
Phosphorus (as PO ³¯) 0.5 DAO 2016-08 <0.02 <0.02 0.02 0.04 0.03 0.02
organic and biological constituents
Dissolved Oxygen 5 (minimum)
DAO 2016-08 8.84 8.84 8 7 8 9
BOD5 5 DAO 2016-08 1 1 1 <1 1 2
COD b - parameter not included in DAO 2016-08
15 15 7.6 3.9 6.4 12
Faecal Coliform (MPN/100mL)
100 DAO 2016-08 140
140 79 1700 2400 490
Total Coliform (MPN/100mL)
- parameter not included in DAO 2016-08
1,400
1,400 240 3500 2400 2400
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Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SW IPO 3 (IPO2 in EIA Nov 2016)
Between the old Ipo Dam structure and intakes of existing tunnels 1,2,3 N14° 52’ 26.9” E121° 10’ 56.5
Oil and Grease 1 DAO 2016-08 0.6 0.6 0.8 0.7 0.67 0.6
Elements
Antimony (Sb) - parameter not included in DAO 2016-08
<0.001 <0.001 <0.008 <0.008 <0.008 <0.008
Arsenic (As) 0.01 DAO 2016-08 <0.01 <0.01 <0.01 <0.01 <0.01 <0.008
Cadmium (Cd) 0.003 DAO 2016-08 <0.006 <0.006 <0.003 <0.003 <0.003 <0.001
Chromium (hexavalent, Cr(VI))
0.01 DAO 2016-08
<0.003 - - - -
Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 <0.01 <0.02 <0.02 <0.003
Lead (Pb) 0.01 DAO 2016-08 <0.05 <0.05 - 0.01 <0.005 <0.005
Manganese (Mn) 0.2 DAO 2016-08 0.05 0.05 - - - -
Mercury (Hg) 0.001 DAO 2016-08 <0.0001 <0.0001 <0.0002 <0.0002 <0.0002 <0.0002
Nickel (Ni) 0.04 DAO 2016-08 <0.01 <0.01 <0.03 <0.03 <0.03 <0.003
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Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SW IPO 3 (IPO2 in EIA Nov 2016)
Between the old Ipo Dam structure and intakes of existing tunnels 1,2,3 N14° 52’ 26.9” E121° 10’ 56.5
Vanadium (V) - parameter not included in DAO 2016-08
<1.0 <1.0 <0.005 0.008 0.008 0.005
Zinc (Zn) 2 DAO 2016-08 <0.02 <0.02 0.02 0.01 0.1 <0.005
Table 31. Water Quality Results for SW IPO4
Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SW IPO4 ~ 350m downstream of Ipo Dam
N14° 52’ 36.8” E121° 10’ 42.3”
Year/ quarter
2013 WET
(May to October)
2014 DRY (Novemb
er to April)
July 11, 2018
Aug. 23,
2018
Sept. 20, 2018
Nov. 6, 2018
Physical Characteristics
Temp (°C) 26-30 DAO 2016-08 31.96 31.96 27.1 25.6 25.3 20.3
Salinity (%) - parameter not included in DAO 90-34
9.83 9.83 4.1 3.2 4.9 5.7
TSS 65 DAO 2016-08 5 5 - - - -
Electric Cond. (mS/cm) - parameter not included in DAO 2016-08
153.6 153.6 146 147 159 143
Turbidity (NTU) 20 EP (Water Quality) Policy 2003, ANZECC
4.02 4.02 19 34 13 5.6
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Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SW IPO4 ~ 350m downstream of Ipo Dam
N14° 52’ 36.8” E121° 10’ 42.3”
Colour (Apparent, PCU)
50 DAO 2016-08, class B 5 5 10 20 8 8
TDS - parameter not included inDAO 2016-08
97 97 8.6 84 93 81
pH 6.50-8.50 DAO 2016-08 8.16 8.16 7.4 7.3 7.5 7.3
Inorganic and nonmetallic constituents
Total Nitrogen
DAO 2016-08 - 5.5 7.9 17 6.8
Nitrogen (as NO ¯) 7 DAO 2016-08 <0.02 <0.02 0.2 0.05 0.9 0.2
Oxidation Reduction Potential ORP (mV)
- parameter not included in DAO 2016-08
195 195 528 231 269 283
Phosphorus (as PO ³¯) 0.5 DAO 2016-08 <0.006 <0.006 0.03 0.5 0.03 0.01
organic and biological constituents
Dissolved Oxygen 5 (minimum
)
DAO 2016-08 6.25 6.25 9 9 10
BOD5 5 DAO 2016-08 1 1 2 <1 1
COD - parameter not included in DAO 2016-08
9.8 9.8 14 17 13
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Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SW IPO4 ~ 350m downstream of Ipo Dam
N14° 52’ 36.8” E121° 10’ 42.3”
Faecal Coliform (MPN/100mL)
100 DAO 2016-08 70 70 49 280 330
Total Coliform (MPN/100mL)
- parameter not included in DAO 2016-08
540 540 130 3500 2400
Oil and Grease 1 DAO 2016-08 0.5 0.5 0.4 0.8 0.8
Elements
Antimony (Sb) - parameter not included in DAO 2016-08
<0.001 <0.001 8 9 8 <0.008
Arsenic (As) 0.01 DAO 2016-08 <0.01 <0.01 1 1 1 <0.008
Cadmium (Cd) 0.003 DAO 2016-08 <0.006 <0.006 8.5 8.4 6.4 <0.001
Chromium (hexavalent, Cr(VI))
0.01 DAO 2016-08 <0.003 <0.003 5400 2400 2400
Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 9200 92200 2400 <0.003
Lead (Pb) 0.01 DAO 2016-08 <0.05 <0.05 0.7 0.9 <0.005
Manganese (Mn) 0.2 DAO 2016-08 0.03 0.03 -
Mercury (Hg) 0.001 DAO 2016-08 <0.0001 <0.0001 <0.008 <0.008 <0.008 <0.0002
Nickel (Ni) 0.04 DAO 2016-08 <0.01 <0.01 <0.01 <0.01 <0.01 <0.003
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Parameter Adopted Criteria (Class B
DAO 2016-08)
Reference SW IPO4 ~ 350m downstream of Ipo Dam
N14° 52’ 36.8” E121° 10’ 42.3”
Vanadium (V) - parameter not included in DAO 2016-08
<1.0 <1.0 <0.003 <0.003 <0.003 0.006
Zinc (Zn) 2 DAO 2016-08 <0.02 <0.02 - - - 0.007
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Table 32. Water Quality in IPO5 Parameter Adopted
Criteria Unit Reference Sept 20, 2018
Physical Characteristics
Temp 26-30 °C DAO 2016-08, class B;
26
Salinity - % parameter not included in DAO 2016-08
4.9
TSS 65 mg/L DAO 2016-08, class B
-
Electric Conductivity (EC)
- µS/cm parameter not included in DAO 2016-08;
163
Turbidity 20 NTU EP (Water Quality) Policy 2003, ANZECC
21
Colour 50 TCU parameter not included in DAO 2016-08
10
TDS - mg/L parameter not included inDAO 2016-08
97
pH 6.50-8.50
DAO 2016-08, class B
7.6
Inorganic and nonmetallic constituents
Total Nitrogen - mg/L parameter not included in DAO 2016-08
12
Nitrogen (as NO ¯) 7 mg/L DAO 2016-08, class B
1.2
Oxidation- Reduction Potential (ORP)
- mV parameter not included in DAO 2016-08
311
Phosphorus (as PO ³¯)
0.5 mg/L DAO 2016-08, class B
0.03
organic and biological constituents
Dissolved Oxygen 5 mg/L DAO 2016-08, class B
9
BOD5 5 mg/L DAO 2016-08, class B
1
COD - mg/L parameter not included in DAO 2016-08
8.4
Faecal Coliform 100 MPN/100mL
DAO 2016-08, class B
35000
Total Coliform - - parameter not included in DAO 2016-08
35000
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Parameter Adopted Criteria
Unit Reference Sept 20, 2018
Oil and Grease 1 mg/L DAO 2016-08, class B
0.56
Elements
Antimony (Sb) - mg/L parameter not included in DAO 2016-08
<0.008
Arsenic (As) 0.01 mg/L DAO 2016-08 <0.01
Cadmium (Cd) 0.003 mg/L DAO 2016-08 <0.003
Chromium (hexavalent, Cr(VI))
0.01 mg/L DAO 2016-08 -
Copper (Cu) 0.02 mg/L DAO 2016-08 <0.02
Lead (Pb) 0.01 mg/L DAO 2016-08 <0.005
Manganese (Mn) 0.2 mg/L DAO 2016-08 -
Mercury (Hg) 0.001 mg/L DAO 2016-08 <0.0002
Nickel (Ni) 0.04 mg/L DAO 2016-08 <0.03
Vanadium (V) 0.075 mg/L WHO 0.007
Zinc (Zn) 2 mg/L DAO 2016-08 <0.005
Bromide Mg/L DAO 2016-08 -
Water quality in IDSSP
Water samples were also collected from inside and outside the silt curtain areas (Ipo Dam Slope Stabilization Project IDSSP- Ipo inside curtain and IDSSP- Ipo outside curtain) on August 28, 2018. The results were also compared to the Class B standards for fresh surface water similar to the sample taken from other sites along Angat River. Results are shown in Table 33.
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Photo 1 IDSSP water sampling, 2018 August 28
Table 33. Water Quality in IDSSP (Inside and Outside Curtain) Parameter Adopted
Criteria Unit Reference IDSSP-IPO
INSIDE CURTAIN
IDSSP-IPO OUTSIDE CURTAIN
Physical Characteristics
Temp 26-30 °C DAO 2016-08, class B;
27.2 26.3
Salinity - % parameter not included in DAO 2016-08
4.1 3.2
TSS 65 mg/L DAO 2016-08, class B
- -
Electric Conductivity (EC)
- µS/cm parameter not included in DAO 2016-08;
168 146
Turbidity 20 NTU EP (Water Quality) Policy 2003, ANZECC
27 36
Colour 50 TCU parameter not included in DAO 2016-08
15 8
TDS - mg/L parameter not included in DAO 2016-08
96 85
pH 6.50-8.50 DAO 2016-08, class B
10.0 7.8
Inorganic and nonmetallic constituents
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Parameter Adopted Criteria
Unit Reference IDSSP-IPO INSIDE
CURTAIN
IDSSP-IPO OUTSIDE CURTAIN
Oxidation- Reduction Potential (ORP)
- mV parameter not included in DAO 2016-08
587 571
Total Nitrogen - mg/L parameter not included in DAO 2016-08
2.7 0.03
Nitrogen (as NO ¯) a
7 mg/L DAO 2016-08, class B
0.1 0.1
Phosphorus (as PO ³¯)
0.5 mg/L DAO 2016-08, class B
0.01 0.03
organic and biological constituents
Dissolved Oxygen
5 mg/L DAO 2016-08, class B
8 8
BOD5 5 mg/L DAO 2016-08, class B
1 1
COD - mg/L parameter not included in DAO 2016-08
2.9 <1.82
Faecal Coliform
100 MPN/100mL DAO 2016-08, class B
54,000 1700
Total Coliform - - parameter not included in DAO 2016-08
160,000 3500
Oil and Grease 1 mg/L DAO 2016-08, class B
2.6 1.0
Elements
Antimony (Sb) - mg/L parameter not included in DAO 2016-08
<0.008 <0.008
Arsenic (As) 0.01 mg/L DAO 2016-08, class B
<0.01 <0.01
Cadmium (Cd) 0.003 mg/L DAO 2016-08, class B
<0.003 <0.003
Chromium (hexavalent, Cr(VI))
0.01 mg/L DAO 2016-08, class B
- -
Copper (Cu) 0.02 mg/L DAO 2016-08, class B
<0.02 <0.02
Lead (Pb) 0.01 mg/L DAO 2016-08, class B
<0.005 <0.005
Manganese (Mn)
0.2 mg/L DAO 2016-08, class B
- -
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Parameter Adopted Criteria
Unit Reference IDSSP-IPO INSIDE
CURTAIN
IDSSP-IPO OUTSIDE CURTAIN
Mercury (Hg) 0.001 mg/L DAO 2016-08, class B
<0.0002 <0.0002
Nickel (Ni) 0.04 mg/L DAO 2016-08, class B
<0.03 <0.03
Vanadium (V) 0.075 mg/L WHO 0.008 0.007 Zinc (Zn) 2 mg/L DAO 2016-
08, class B 0.008 0.01
Assessment12 of Bigte River, Ipo River and IDSSP (July to December 2018)
The in situ and laboratory results confirmed that the water quality along Angat River is within the Class B standards for fresh surface water. It is noted that exceedances on baseline data were observed in temperature, pH, feacal coliform and mercury. Colder water temperature is noted result in 2018 Nov sampling activity. Elevated fecal coliform was reported at the Ipo Dam site and downstream of Ipo Dam during the conduct of baseline data gathering. It is noted that communities beside the riverbanks of Angat River and its tributaries have poor sanitation practices. This may have contributed to elevated fecal coliform. All heavy metal parameters, on the other hand, are mostly below detection limit.
It should be noted that CMC provided sanitation facilities such as portalets in all construction sites. These are all properly and regularly collected and maintained.
For IDSSP, elevated fecal and total coliform are reported on both sampling locations (inside and outside silt curtains). Moreover, turbidity and pH exceeded the DENR standards for IDSSP – inside curtain. Turbidity is expected to increase since silts are trapped on the silt curtains. During wet season, the turbidity of the river water outside the silt curtain is higher than the river water contained by the silt curtain. The pH and coliform results show higher measure inside the silt curtain compared to the results of samples taken from outside the
12 Ambient environmental conditions should be compared to the relevant ambient standards and/or performance indicators noted in the EMP.
Any exceedances should be highlighted for attention and follow-up. In addition, ambient environmental conditions could be compared to the baseline conditions (if baseline data is available) and described in qualitative terms or be evaluated based on a ranking system, such as the following:
1. Very Good (overall conditions are generally improved) 2. Good (conditions are maintained or slightly improved) 3. Fair (conditions are unchanged) 4. Poor (conditions are moderately degraded) 5. Very Poor (conditions are significantly degraded)
Additional explanatory comments should be provided as necessary.
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silt curtain. The alkaline nature of water within the silt curtain may be due to a high salt contents particularly dissolved salts (sodium, calcium, magnesium carbonates and bicarbonates) which may be present in the soil that have eroded during the wet season. Since water column is protected by silt curtain, it is not as freely flowing and mineral often form column of mineral deposits which causes pH to increase.
Air and Noise Quality Monitoring Program
Summary of Air Quality Monitoring
Ambient air quality sampling was conducted on 25-28 September 2018 and 19-21 November 2018. A 24-hour sampling was conducted in three (3) sampling sites: Ipo Dam Site, Brgy. San Mateo, and MWSS Bigte Area. Below are the map and photos of sampling sites for the air quality monitoring (Fig. 7).
Code/ General
Location
Photos
Ipo Dam Site
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Brgy. Hall of San Mateo
MWSS Bigte Area
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Figure 7. Air quality monitoring sampling points
Result of Ambient Air Quality Monitoring (September and November 2018)
Tables 34 to 35 and Appendix 8.4 present the results of sampling and analysis conducted from three (3) stations in comparison with the National Ambient Air Quality Guideline Values (NAAQGV) prescribed under Republic Act 8749 (Clean Air Act) Implementing Rules and Regulations.
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Table 34. Results of Ambient Air Quality Monitoring, September 2018
Parameter Sampling method Test
method
DENR
standards
(NAAQGV)
Reporting
limits Units
AT4- A1 AT4- A2 AT4
A3 AT4- A1 AT4- A2 AT4 A3
Near
MWSS
Bigte
property
San
Mateo
Barangay
Hall
Ipo
Dam
site
Near
MWSS
Bigte
property
San
Mateo
Barangay
Hall
Ipo Dam
site
WET
(30-31
Jul
2013)
WET
(31 Jul-1
Aug
2013)
WET
(1-2
Aug
2013)
WET
25-28
Sept
2018)
WET
25-28
Sept
2018)
WET
25-28
Sept
2018)
Wet Season Baseline
TSP Filtration method by high-
volume sampler Flame AAS
230 0.1 µg/Ncm 119.87 33.9 35.4 439 134.5 50.2
SO2 Absorption in liquids for
gaseous pollutants - Kimoto Brand (sampler)
Flame AAS
180 0.4 µg/Ncm 15.26 15.26 13.9 2.0 ND ND
NO2 Absorption in liquids for
gaseous pollutants - Kimoto Brand (sampler)
Flame AAS
150 0.4 µg/Ncm 3.57 3.42 6.56 7.0 6.3 4.7
PM10 Filtration method by high-
volume sampler Flame AAS
150 20 µg/Ncm 71.09 30 33.19 160.9 62.0 27.8
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Table 35. Ambient Air quality, November 2018
Parameter Sampling method Test
method
DENR
standards
(NAAQGV)
Reporting
limits Units
AT4- A1 AT4- A2 AT4
A3 AT4- A1 AT4- A2 AT4 A3
Near
MWSS
Bigte
property
San
Mateo
Barangay
Hall
Ipo
Dam
site
Near
MWSS
Bigte
property
San
Mateo
Barangay
Hall
Ipo
Dam
site
DRY
(2-3
June
2014)
DRY
(4-5 June
2014)
DRY
(3-4
June
2014)
DRY
(19-21
Nov
2018)
DRY
(19-21
Nov
2018)
DRY
(19-21
Nov
2018)
Dry season Baseline
TSP Filtration method by high-
volume sampler
Flame
AAS 230 0.1 µg/Ncm 56.91 48.17 17.65 82.8 87.2 22.7
SO2
Absorption in liquids for
gaseous pollutants -
Kimoto Brand (sampler)
Flame
AAS 180 0.4 µg/Ncm 2.88 3.06 2.16 1.7 ND ND
NO2
Absorption in liquids for
gaseous pollutants -
Kimoto Brand (sampler)
Flame
AAS 150 0.4 µg/Ncm 4.14 4.56 3.06 7.4 7.4 1.2
PM10 Filtration method by high-
volume sampler
Flame
AAS 150 20 µg/Ncm 117.44 107.68 45.26 50.5 56.0 14.1
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Assesment3 for Air Quality Monitoring
For September 2018 sampling, all stations passed the DENR standard for all parameters except for total suspended particulate matter (TSP) and particulate matter at 10 microns (PM10) at the MWSS Bigte station. The TSP and PM10 values, which exceeded the DENR Standard, may have been also influenced by the dusts coming from the cement plant operation. Also, occasional passing vehicles, wind propagation and ongoing construction within vicinity were observed at the station during the sampling.
Meanwhile, all stations also passed the DENR standard for all parameters in November 2018 sampling.
Summary of Noise Quality Monitoring (July to December 2018)
A noise level monitoring was conducted by CRL Laboratories in September and November 2018. The noise levels were recorded in decibels (dB). The results are compared with the DENR Ambient Noise Quality Standards Sec 78 Chapter IV, Article 1 of National Pollution Control Commission (NPCC) Rules and Regulations, 1978 standard limits for Class A category and WHO guidelines.
Maximum Allowable Noise Levels in General Areas, NPCC
Category of Area
Morning 5:00am to
9:00am
Daytime 9:00am- 6:00pm
Evening 6:00pm- 10:00pm
Night Time 10:00pm –
5:00am AA 45dB 50dB 45dB 40dB A 50dB 55dB 50dB 45dB B 60dB 65dB 60dB 55dB C 65dB 70dB 65dB 60dB D 70dB 75dB 70dB 65Db
Legend:
AA A section or contiguous area which requires quietness such as area within 100 meters from school sites, nursery schools, hospitals, and special home for the aged A A section or contiguous area that is primarily used for residential purposes B A section or contiguous area that is primarily a commercial area C A section primarily reserved as light industrial area D A section that is primarily reserved as a heavy industrial area
Maximum Allowable Noise Levels in General Areas, WHO
Reference / Jurisdiction Ambient Standard
Guidelines for Community Noise, WHO, 1999
International
Receptor: Residential; institutional; educational
Daytime (07:00-22:00): 55dBA
Nighttime (22:00-07:00): 45dBA
Receptor: Industrial; commercial
70dBA throughout the day
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Result of Noise Level Monitoring (September and November 2018)
Tables 36 to 41 presented the noise level measurements at the different locations onsite:
September 2018
Table 36. Noise level in Ipo Dam Compound, 2018 September Sampling
Time (September 26-27, 2018)
Average dB(A)
DENR Standard for Light Industrial Area
Maximum Allowable Noise Level, dB(A)***
Remarks
1140H – 1340H 50.7 70 Passed 1340H – 1540H 51.0 70 Passed 1540H – 1740H 54.1 70 Passed 1740H – 1940H 53.3 70 Passed 1940H – 2140H 47.8 65 Passed 2140H – 2340H 46.4 65 Passed 2340H – 0140H 45.5 60 Passed 0140H – 0340H 46.9 60 Passed 0340H – 0540H 48.5 60 Passed 0540H – 0740H 55.2 60 Passed 0740H – 0940H 56.2 65 Passed 0940H – 1140H 55.5 65 Passed
Table 37. Noise level in San Mateo Brgy. Hall, 2018 September Sampling Time
(Sept 25-26, 2018)
DENR Standard for Residential
Area Maximum
Allowable Noise Level, dB(A)***
Baseline Wet
Season (31 Jul –
1 Aug 2013)
Average dB(A)
Remarks
1100H - 1300H 55 62.2 68.2 Exceeded the
Maximum Allowable
Noise Level
1300H - 1500H 55
66.8
67.4 Exceeded the
Maximum Allowable
Noise Level
1500H - 1700H 55
60.9
67.2 Exceeded the
Maximum Allowable
Noise Level
1700H - 1900H 55
64.2
67.6 Exceeded the
Maximum Allowable
Noise Level
1900H - 2100H 50
59.4
65.8 Exceeded the
Maximum Allowable
Noise Level
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Sampling Time (Sept 25-26,
2018)
DENR Standard for Residential
Area Maximum
Allowable Noise Level, dB(A)***
Baseline Wet
Season (31 Jul –
1 Aug 2013)
Average dB(A)
Remarks
2100H - 2300H 50
61.4
62.4 Exceeded the
Maximum Allowable
Noise Level
2300H - 0100H 45
54.2
62.1 Exceeded the
Maximum Allowable
Noise Level
0100H - 0300H 45
47.5
57.9 Exceeded the
Maximum Allowable
Noise Level
0300H - 0500H 45
43.9
51.0 Exceeded the
Maximum Allowable
Noise Level
0500H - 0700H 45
51.6
53.2 Exceeded the
Maximum Allowable
Noise Level
0700H - 0900H 50
64.0
65.8 Exceeded the
Maximum Allowable
Noise Level
0900H - 1100H 50
63.6
65.2 Exceeded the
Maximum Allowable
Noise Level
Table 38. Noise level in MWSS Bigte Compound, 2018 September Sampling Time
(Sept 27-28, 2018)
DENR Standard for Light Industrial Area
Maximum Allowable Noise Level, dB(A)***
Average dB(A)
Remarks
1725H - 1925H 70 66.2 Passed
1925H - 2125H 65 65.5 Exceeded the Maximum Allowable
Noise Level 2125H - 2325H 65 63.9 Passed
2325H - 0125H 60 59.3 Passed 0125H - 0325H 60 55.7 Passed
0325H - 0525H 60 55.9 Passed
0525H - 0725H 65 58.9 Passed 0725H - 0925H 65 59.9 Passed
0925H - 1125H 70 61.0 Passed 1125H - 1325H 70 56.3 Passed
1325H - 1525H 70 56.7 Passed 1525H - 1725H 70 58.5 Passed
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November 2018
Table 39. Noise level in Ipo Dam Compound, 2018 November Sampling
Time (Nov 20-21,
2018)
DENR Standard Maximum Allowable Noise
Level, dB(A)***
Average dB(A)
Remarks
1213H - 1413H 70 50.7 Passed
1413H - 1613H 70 51 Passed 1613H - 1813H 70 54.1 Passed
1813H - 2013H 70 53.3 Passed
2013H - 2213H 65 47.8 Passed 2213H - 2413H 65 46.4 Passed
2413H - 0213H 60 45.5 Passed 0213H - 0413H 60 46.9 Passed
0413H - 0613H 60 48.5 Passed 0613H - 0813H 65 55.2 Passed
0813H - 1013H 65 56.2 Passed
1013H - 1213H 70 55.5 Passed
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Table 40. Noise level in San Mateo Brgy. Hall, 2018 November Sampling
Time (Nov 20-21,
2018)
DENR Standard Maximum Allowable
Noise Level, dB(A)***
Baseline Dry
Season (4-5 Jun
2014
Average dB(A)
Remarks
1213H - 1413H 55 61.70 50.7 Passed
1413H - 1613H 55 61.80 51 Passed
1613H - 1813H 55 63.00 54.1 Passed
1813H - 2013H 50 61.70 53.3 Exceeded the Maximum Allowable
Noise Level 2013H - 2213H 50 62.40 47.8 Passed
2213H - 2413H 45 60.00 46.4 Exceeded the Maximum Allowable
Noise Level 2413H - 0213H 45 55.90 45.5 Exceeded the
Maximum Allowable Noise Level
0213H - 0413H 45 46.20 46.9 Exceeded the Maximum Allowable
Noise Level 0413H - 0613H 50 42.60 48.5 Passed
0613H - 0813H 50 56.50 55.2 Exceeded the Maximum Allowable
Noise Level 0813H - 1013H 55 61.30 56.2 Exceeded the
Maximum Allowable Noise Level
1013H - 1213H 55 64.70 55.5 Exceeded the Maximum Allowable
Noise Level
Table 41. Noise level in MWSS Bigte Compound, 2018 November Sampling
Time (Nov 21-22,
2018)
DENR Standard Maximum Allowable Noise
Level, dB(A)***
Average dB(A)
Remarks
1539H-1739H 70 64.3 Passed
1739H-1939H 65 67.2 Exceeded the Maximum Allowable
Noise Level
1939H-2139H 65 68.1 Exceeded the Maximum Allowable
Noise Level 2139H-2339H 60 65.6 Exceeded the
Maximum Allowable Noise Level
2339H-0139H 60 58.8 Passed 0139H-0339H 60 57.9 Passed
0339H-0539H 65 58.5 Passed
0539H-0739H 65 58.2 Passed
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Sampling Time
(Nov 21-22, 2018)
DENR Standard Maximum Allowable Noise
Level, dB(A)***
Average dB(A)
Remarks
0739H-0939H 70 61.6 Passed
0939H-1139H 70 66.1 Passed 1139H-1339H 70 67.9 Passed
1339H-1539H 70 65.1 Passed
Assesment3 for Noise Quality Monitoring (September and November 2018)
The noise measurement was conducted 4 times every 2 hours interval for a representative reading. Monitoring was conducted on a sunny, fair and cloudy weather associated with light to moderate winds. The prevailing winds at the time of sampling came mostly from various directions.
The results of the noise monitoring for 2018 September shows that stations located within the construction sites in Ipo Dam Site have passed the DENR standard for noise level. The noise at the vicinity of MWSS Bigte Compound was slightly elevated at 7:25-9:25 in the evening. The noise level at San Mateo Brgy Hall exceeded the DENR standard during the 24-hour sampling.
On the other hand, results of the noise monitoring for 2018 November also show within acceptable limit at Ipo Dam Site and slightly elevated noise at MWSS Bigte Compound at 17:39H-23:39H. The noise level at San Mateo Barangay Hall is within the noise level limit only in the afternoon (12:13H – 18:13H), late evening (20:13H – 22:13H) and early morning (04:13H – 06:13H).
It should be noted that the baseline data from 2014 survey showed that elevated noise level was predominant (passed the noise standard only at 3:00 - 5:00 AM). The results of the September 2018 noise monitoring show almost similar noise pattern with the 2014 baseline data. Such elevated noise level cannot be directly attributed to the construction works.
Summary of Sound Level Monitoring in General Construction Sites
Noise levels are measured weekly using portable sound level meter procured by CMC. Tables 42 to 51 indicated the results of noise monitoring from July to December 2018.
July 2018
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Table 42. Sound levels in Bigte Construction Work Area 2018 July, morning Location Class D
Allowable Limit
Noise level , dB 1:00-6:00pm
Remarks
Max Min
Front Office
70 dB 60.6 54.3
Mwss Area
70 dB 70.1 65.2
Portal
70 dB 86.9 81 Beyond allowable
limit
Back Up Entrance
70 dB 96 89.2 Beyond allowable
limit
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Location Class D Allowable
Limit
Noise level , dB 1:00-6:00pm
Remarks
Max Min
Control Cabin
70 dB 94.3 88.9 Beyond allowable
limit
Warehouse
70 dB 88.9 85 Beyond allowable
limit
Tippler
70 dB 86 78.3 Beyond allowable
limit
Pre-Cast
70 dB 74.1 60.6 Beyond allowable
limit
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Location Class D Allowable
Limit
Noise level , dB 1:00-6:00pm
Remarks
Max Min
Industrial Gate
70 dB 77.3 63 Beyond allowable
limit
Water Treatment
70 dB 68.9 60.1 -
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Table 43. Sound levels in Ipo Construction Work Area 2018 July, evening (9:00 pm – 10:00 pm) Location Class C
Allowable Limit
Noise level , dB 1:00-6:00pm
Remarks
Max Min
Ipo Dam Bridge
65 dB 59.2 57.1 -
Mwss Operation Office
65 dB 68.7 60.3 Beyond allowable limit
Ipo Site Slope
65 dB 61.5 58 -
Ipo Site Access
65 dB 61.2 56.6 -
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Location Class C Allowable
Limit
Noise level , dB 1:00-6:00pm
Remarks
Max Min
Ipo Site Office
65 dB 60.4 56.7 -
Ipo Site Downstream
65 dB 54.8 50.5 -
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August 2018
Table 44. Sound levels in Ipo Work Area – Sitio Ipo (Vicinity of Watershed Building, across the Ipo Dam on 15 Aug 2018 (9:00 AM – 9:00 PM)
SAMPLING TIME NOISE LEVEL (DB)
DENR STANDARD MAXIMUM
ALLOWABLE NOISE LEVEL
CLASS A, DB
REMARKS
0500H – 0900 H (Morning) 61.4 50
Ear Plug Required
0900H – 1800 H (Daytime) 70 55
Ear Plug Required
1800H – 2200 H (Evening) 65.3 50
Ear Plug Required
2200H – 0500 H (Nighttime)
62 45 Ear Plug Required
For Class A (A section which is primarily a RESIDENTIAL area)
Table 45. Sound levels in Bigte Work Area – Portal Area (at tally room vicinity) on 15 Aug 2018 (9:00 AM – 8:00 PM)
SAMPLING TIME NOISE LEVEL (DB)
DENR STANDARD MAXIMUM
ALLOWABLE NOISE LEVEL CLASS C, DB
REMARKS
0500H – 0900 H (Morning) 82.1 65
Required ear plug
0900H – 1800 H (Daytime) 79.3 70
Required ear plug
1800H – 2200 H (Evening) 64 65
Normal, within the limit
2200H – 0500 H (Nighttime)
64 60 Ear plug required
For Class C (A section primarily zoned or used as a LIGHT INDUSTRIAL area)
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Table 46. Sound levels in Sitio Settling (about 100m from portal, MWSS Bigte) on 15 Aug 2018 (9:15AM to 8:45 PM)
SAMPLING TIME NOISE LEVEL (DB)
DENR STANDARD MAXIMUM
ALLOWABLE NOISE LEVEL
CLASS A, DB
REMARKS
0500H – 0900 H (Morning)
65.4 50 Ear plug required
0900H – 1800 H (Daytime)
62.6 55 Ear plug required
1800H – 2200 H (Evening)
71.8 50 Ear plug required
2200H – 0500 H (Nighttime)
62 45 Ear plug required
For Class A (A section which is primarily a RESIDENTIAL area)
Table 47. Sound levels in Industrial Area (about 100m from portal, MWSS Bigte) on 15 Aug 2018 (9:30 AM to 8:30 PM)
SAMPLING TIME NOISE LEVEL (DB)
DENR STANDARD MAXIMUM
ALLOWABLE NOISE LEVEL
CLASS C, DB
REMARKS (PASSED OR EXCEEDED)
0500H – 0900 H (Morning)
78.1 65 Required Ear plug
0900H – 1800 H (Daytime)
67.6 70 Normal
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1800H – 2200 H (Evening)
64 65 Normal
2200H – 0500 H (Nighttime)
54.1 60 Normal
For Class C (A section primarily zoned or used as a LIGHT INDUSTRIAL area)
Table 48. Sound levels in Outside the Tippler Area (about 200m from portal, MWSS Bigte on 15 Aug 2018 (10:00 AM to 9:00 PM)
SAMPLING TIME NOISE LEVEL (DB)
DENR STANDARD MAXIMUM ALLOWABLE NOISE
LEVEL CLASS A,
DB
REMARKS (PASSED OR EXCEEDED)
0500H – 0900 H (Morning) 71.4 50 Over the limit 0900H – 1800 H (Daytime) 65.6 55 Over the limit 1800H – 2200 H (Evening) 64.9 50 Over the limit
2200H – 0500 H (Nighttime)
57.8 45 Over the limit
October 2018
Table 49. Sound levels in Bigte Construction Work Area 2018 October
Location Allowable Limit
Unit Maximum Minimum Remarks
70 dB 59.2 57.3
Within
allowable
limit
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Location Allowable Limit
Unit Maximum Minimum Remarks
Front Office
Portal
70 dB 89.9 77.6
Exceeded
allowable
limit
(Earplugs
are
needed)
MWSS Area
70 dB 61.5 59.9
Within
allowable
limit
TBM (Back Up)
70 dB 89.2 88.7
Exceeded
allowable
limit
(Earplugs
are
needed)
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Location Allowable Limit
Unit Maximum Minimum Remarks
TBM (Control Cabin)
70 dB 86.4 73.4
Exceeded
allowable
limit
(Earplugs
are
needed)
TBM (Erection Area)
70 dB 88.3 84.2
Exceeded
allowable
limit
(Earplugs
are
needed)
Tippler
70 dB 81.3 79.2
Within
allowable
limit
Wastewater Treatment Plant
(WTP)
70 dB 74.8 60.3
Exceeded
allowable
limit
(Earplugs
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Location Allowable Limit
Unit Maximum Minimum Remarks
are
needed)
Industrial Gate
70 dB 65.1 60.5
Within
allowable
limit
Main Gate
70 dB 72.7 52.8
Exceeded
allowable
limit
(Earplugs
are
needed)
Warehouse
70 dB 62.2 58.3
Within
allowable
limit
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November 2018
Table 50. Sound Level Monitoring, 30 November 2018 (6:00pm-9:00 pm)
Location Allowable
Limit Maximum Minimum Time Remarks
Front Office
65dB 54.1 50.7 7:08 PM Within allowable
limit
Portal
65dB 81.2 80.1 7:32 PM
Exceeded
allowable limit
(Earplugs are
needed)
Back-Up (TBM)
65dB 94.1 93.7 9:15 PM
Exceeded
allowable limit
(Earplugs are
needed)
TBM (Control Cabin)
65dB 92.3 87.4 9:30 PM
Exceeded
allowable limit
(Earplugs are
needed)
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Location Allowable
Limit Maximum Minimum Time Remarks
Industrial Area (Warehouse)
65dB 74.6 52.8 7:45 PM
Exceeded
allowable limit
(Earplugs are
needed)
Industrial Area (Gate)
65dB 74 51.6 7:49 PM
Exceeded
allowable limit
(Earplugs are
needed)
Tippler
65dB 85 81 7:58 PM
Exceeded
allowable limit
(Earplugs are
needed)
Main Gate
60dB 69.4 47.2 11:20 PM
Exceeded
allowable limit
(Earplugs are
needed)
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Location Allowable
Limit Maximum Minimum Time Remarks
Main Gate
65dB 108.7 103.6 8:15 PM
Exceeded
allowable limit
(Earplugs are
needed
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December 2018
Table 51. Sound Level Monitoring, 1 December 2018 (6:00pm-9:00 pm)
Location Allowable
Limit Maximum Minimum Time Remarks
Front Office
50dB 54.1 50.7 7:08 PM
Exceeded allowable limit (Earplugs are
needed)
Portal
65dB 81.2 80.1 7:32 PM
Exceeded allowable limit (Earplugs are
needed)
Back-Up (TBM)
70dB 94.1 93.7 9:15 PM
Exceeded allowable limit (Earplugs are
needed)
70dB 92.3 87.4 9:30 PM
Exceeded allowable limit (Earplugs are
needed)
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Location Allowable
Limit Maximum Minimum Time Remarks
TBM (Control Cabin)
Industrial Area (Warehouse)
70dB 74.6 52.8 7:45 PM
Exceeded allowable limit (Earplugs are
needed)
Industrial Area (Gate)
65dB 74 51.6 7:49 PM
Exceeded allowable limit (Earplugs are
needed)
Tippler
70dB 85 81 7:58 PM
Exceeded allowable limit (Earplugs are
needed)
Main Gate
65dB 69.4 47.2 11:20 PM
Exceeded allowable limit (Earplugs are
needed)
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Location Allowable
Limit Maximum Minimum Time Remarks
Main Car
70dB 108.7 103.6 8:15 PM
Exceeded allowable limit (Earplugs are
needed
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Assessment for Noise Quality Monitoring (July to December 2018)
Exceedances in noise allowable limit were observed in the major construction areas of the site from July to December 2018. This is expected due to machines, equipment and laborers at work. Workers are required to wear earplugs and ear muffs within the construction perimeters. No complaints received from the area regarding noise.
Results of Tunnel Air Quality Monitoring
Air quality monitoring inside the tunnel is conducted with an interval of 2 and 7 seconds.
The air quality parameters monitoring by TBM sensors includes carbon dioxide (CO2),
hydrogen sulphide (H2S) and oxygen (O2). Presented below is the summary of tunnel
air quality monitoring in July to December 2018 (Table 52).
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Table 52. Tunnel air quality monitoring (July to December 2018)
Air quality parameter
standard
reference Reading, ppm
2018 Jul
Reading, ppm
2018 Aug
Reading, ppm
2018 Sep
Reading, ppm
2018 Oct
Reading, ppm
2018 Nov
Reading, ppm
2018 Dec
Average
Carbon Dioxide, CO2 (ppm)13 1000 NIOSH 0.029770 0.029770 0.0088 0.01 0.0093 -0.0279
Hydrogen Sulfide, H2S (ppm)14 10-20 WHO, 2000 0.000005 0.000005 0.0000 0.00 0.0000 0.0000
Oxygen, O2 (%) 17.6-23.5
WHO, 2000 20.994605 20.994605 21.0000 21.00 20.9984 20.9996
Carbon Monoxide, CO15 8.73 WHO, 2000 0.018813 0.018813 0.2361 0.07 0.0519 0.0436
Hydrogen Cyanide, HCN (ppm)16 44.64 WHO,2004 0.006171 0.006171 0.0066 0.01 0.0071 0.0062
Minimum
CO2 (ppm) 1000 NIOSH -0.959144 -0.959144 0.000000 -0.20 -0.7586 -0.2292
H2S (ppm) 10 WHO, 2000 0.000000 0.000000 0.000000 0.00 0.0000 0.0000
O2 (%) 17.6 WHO, 2000 0.000000 0.000000 21.0000 0.00 0.0000 0.0000
CO (ppm) 8.73 (8 hrs)
WHO, 2000 0.000000 0.000000 0.000000 0.00 0.0000 0.0000
HCN (ppm) 17.86 WHO,2004 - - - -0.35 0.0000 -0.5350
Maximum
CO2 (ppm) 1000 NIOSH 1.191796 1.191796 0.3092 1.05 0.5790 0.3045
H2S (ppm) 20 WHO, 2000 2.000000 2.000000 0.0000 0.00 0.0000 0.0000
13 The National Institute for Occupational Safety and Health (NIOSH) considers that indoor air concentrations of carbon dioxide that exceed 1,000 ppm are a marker suggesting inadequate ventilation. 14 Threshold for eye irritation. Ref: Air quality guidelines WHO Regional Office for Europe, Copenhagen, Denmark 2000.
15 15 minutes – 100 mg/m3. 1 hour – 35 mg/ m3. 8 hours – 10 mg/ m3. 24 hours – 7 mg/m3. WHO 2000 Guideline (https://www.ncbi.nlm.nih.gov/books/NBK138710/)
16 In WHO study, moderate impairment in health-related scores showed an increase (no statistical analysis) at exposure levels in excess of 2.5 cyanide hours (mg/m3 × h). Adverse effects are not expected at the low levels reported
i a bie t air usually below μg/ 3 = . pp .
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Air quality parameter
standard
reference Reading, ppm
2018 Jul
Reading, ppm
2018 Aug
Reading, ppm
2018 Sep
Reading, ppm
2018 Oct
Reading, ppm
2018 Nov
Reading, ppm
2018 Dec
O2 (%) 23.5 WHO, 2000 22.000000 22.000000 21.0000 21.00 21.0000 21.0000
Carbon Monoxide, CO (ppm) 30.55 (1hr)
WHO, 2000 22.000000 22.000000 21.0000 63.00 47.0000 47.0000
Hydrogen Cyanide, HCN (ppm) 53.57 (20 min to 1hr)
WHO,2004 - - - 3.77 4.5914 6.3505
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Assessment for Indoor Air Quality Monitoring (July to December 2018)
The air quality inside the tunnel is still within NIOSH and WHO indoor air quality standards.
October 2018 monitoring shows maximum CO measurement at 63 ppm. This reading is noted from 10:42:50 to 10:44:30 on October 14, 2018. November 2018 monitoring shows that the CO exceedance, which ranges from 31-47 ppm, as noted in the maximum reading was observed from 11:43:55 to 11:46:10 on November 9, 2018. Furthermore, the CO exceedance, which ranges from 32-47 ppm, as noted in the maximum reading was observed from 10:05:23 to 10:05:58 on December 2, 2018. These exceedances on CO are just noted for a little more than 2 minutes and less than a minute, respectively. This means the TBM’s ventilation system and its gas control sensors are effectively bringing fresh air, reducing the CO2 footprint inside the tunnel.
Spoil Management and Monitoring Program
Summary of Sediment Quality of Spoil/Excavated Materials
The compact volume of the excavated material, given a 5,988 m tunnel length, is estimated at about 114,781 m3 as of December 31, 2018 (Table 53). The spoil is disposed in the Temporary Spoil Disposal in Bigte.
Table 53. Spoil/ Excavated Materials
Total excavated materials/ spoil (m3) 114, 781
Excavated materials (starting Feb 13, 2018 until previous month), (m3)
108, 437
Excavated materials in December 2018, (m3) 6, 344
Given a swelling factor of ~1.80, the spoil/ excavated materials that is temporarily dumped at the Tippler Area for the period is about 11,419 m3 or about 206,606 m3 total spoil generated.
The delivery receipts of spoil/ excavated material showed a total collection of spoil of about 211,659 m3 with 12,505 m3 for the month of December 2018 (Fig. 8). The little discrepancy in volume may be due to the computation based on delivery receipts/ number of truck collection and capacity of trucks. It should be noted that in most cases, the dump trucks for spoil collection are not fully filled.
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Figure 8. Excavated Material and TBM advancement
201
8-
Feb
-
Mar
201
8-
Apr
201
8-
Ma
y
201
8-
Jun
e
201
8-
July
201
8-
Aug
201
8-
Sep
t
201
8-
Oct
201
8-
Nov
201
8-
Dec
Spoil Volume/ Month 5,98715,47321,53715,86723,80626,33629,26230,38930,49812,505
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
Sp
oil
, m
3
Axis Title
Excavated Materials as per delivery receipt
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Results of Spoil Sediment Quality
The spoil samples were collected from different sections of the tunnel or chainages. The results of laboratory analysis of sediments are presented in Table 54.
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Table 54. Sediment Quality of Spoil/ excavated material
Parameter
Adopted Criteria
reference
Sample ID
maximum average concentration for characterization
absolute maximum
concentration
Spoil Material Sample No. 1
Chainage CH 0+031.92
Spoil Material
Sample No. 2 Chainage
CH 0+142.36
CH 0+317.59
TBM Tunnel
CH 0+485.212
TBM Tunnel
Spoil Material - TBM CH: 0+629,38
Material Sample CH 3 + 881.221
Date of sampling
2-Feb-18 2-Feb-18 7-Apr-18 23-Apr-18 4-May-18 19-
Sept-18
Inorganic and nonmetallic constituents
Total Nitrogen (mg/kg)
25 125 soil quality ANZECC 198 205 94 76 147 417
Total Phosphorus (mg/kg)
25 2,000
Assessment levels for soil, sediment and water (Contaminated Sites Management Series) Department of Environment and Conservation, ANZECC
294 1,180 1450 1560 1,040 905
organic and biological constituents
Oil and Grease (mg/kg)
1,500
Ontario Ministry of the Environment guidelines for open lake disposal of sediments17
496 353 489 589 1,190 193
Potassium (K) (mg/kg)
60 100+ soil quality ANZECC 240 762 1,130 793 - 245
Elements -
17 Ontario Ministry of the Environment guidelines for open lake disposal of sediments (Beyer, W N. 1990. Evaluating soil contamination U.S Fish Wildl. Serv., Biol. Rep. 90(2). 25 pp.; and Irwin, RJ, M. VanMouwerick, L. Stevens,
MD. Seese, and W. Basham. 1997. Environmental Contaminants Encyclopedia. National Park Service, Water Resource Division, Fort Collins, Colorado.)
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Parameter
Adopted Criteria
reference
Sample ID
maximum average concentration for characterization
absolute maximum
concentration
Spoil Material Sample No. 1
Chainage CH 0+031.92
Spoil Material
Sample No. 2 Chainage
CH 0+142.36
CH 0+317.59
TBM Tunnel
CH 0+485.212
TBM Tunnel
Spoil Material - TBM CH: 0+629,38
Material Sample CH 3 + 881.221
Chromium (mg/kg)
75 150
NSW EPA. Protection of the Environment
Operations (Waste) Regulation 2014.
Application to land as engineering fill or for use in
earthworks
6.9 1.0 1.4 0.9 3.6 ND
Copper** (mg/kg)
100 200
NSW EPA. Protection of the Environment
Operations (Waste) Regulation 2014.
Application to land as engineering fill or for use in
earthworks
117 121 110 88 73
Iron (mg/kg) 17 26,600 24,900 15,900 - 10,700
Lead (mg/kg) 50 100
NSW EPA. Protection of the Environment
Operations (Waste) Regulation 2014.
Application to land as engineering fill or for use in
earthworks
6,610 ND ND ND ND ND
Manganese (mg/kg)
ND 916 345 330 396 286
Nickel (mg/kg) 30 60
NSW EPA. Protection of the Environment
Operations (Waste) Regulation 2014.
Application to land as engineering fill or for use in
earthworks
129 9.4 2.3 2.3 5.9 2.5
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Parameter
Adopted Criteria
reference
Sample ID
maximum average concentration for characterization
absolute maximum
concentration
Spoil Material Sample No. 1
Chainage CH 0+031.92
Spoil Material
Sample No. 2 Chainage
CH 0+142.36
CH 0+317.59
TBM Tunnel
CH 0+485.212
TBM Tunnel
Spoil Material - TBM CH: 0+629,38
Material Sample CH 3 + 881.221
Zinc (mg/kg) 150 300
NSW EPA. Protection of the Environment
Operations (Waste) Regulation 2014.
Application to land as engineering fill or for use in
earthworks
8.1 29 31 47 21 20
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Assessment for Sediment Quality of Spoil / Excavated Material
The spoil samples are within the acceptable heavy metal content.
Freshwater Monitoring Program (Wet Season)
Freshwater Ecology Survey was conducted on September 20, 2018. The survey was led by Dr
Roberto Pagulayan. There are 5 Dumagats who served as local assistants during the conduct
of the survey.
Sampling site at Sta.Maria River
Sampling at Angat River adjacent to the construction site
In situ water quality measurement and preparation of various samples
Fish sampling at near Sitio Settling, Brgy Bigte
Photo 2. River Ecology Monitoring, 2018 September
The report will be available in March 2019.
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Terrestrial Ecology Monitoring
Wet Season
Terrestrial ecology monitoring was conducted on August 11 – 14, 2018. There were 3
Dumagats who served as local guides/ assistants during the conduct of flora and fauna
surveys.
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Plot
Transect
Amphibian observation
Sorting of biomass
Setting up of monitoring plot in MWSS Bigte Compound
Rodent traps held by a Dumagat field assistant
Photo 3. Terrestrial Ecology Monitoring, 2018 August
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The full report was presented in Appendix 2 of MPR 2018 October (Appendix
8.7).
The full report is presented in Appendix 8.6 while conclusion and
recommendations are presented below.
As what has been found during the dry season sampling, result of the wet season
biodiversity of flora and fauna study revealed that the studied plots have
considerable biodiversity and carbon stock budget, although there is an ongoing
construction for AWTIP water transmission tunnel. There are more flora species
during the wet season compared to the dry season sampling which can be due to
wet season species that were not able to grow during the drought period of the
dry season. All of the big tree species are still alive, which means no further tree
fall and tree cutting activities has been conducted. Some small trees died/cut down
in some of the sites.
There was a lower fauna species recorded during the wet season survey, which
can be due to sampling difficulty as typhoon is passing the area during the time of
the field survey. This also contributed to absence of some species that were taking
refuge somewhere in the area. Still, the consultants raised possible threats to flora
and fauna within the study area, as the continuous loss of their natural habitats
can lead to a serious environmental loss, and might lead to probable extirpation
of species from the site in the near future. Moreover, it is emphasized that big trees
should be protected, as these contain most of the stored carbon that has been
sequestered for decades.
To reduce the impact of tunnel construction, the following are suggested:
(a) Some portion of studied site had been affected by construction activities. This
indicates that land clearing and tree cutting is inevitable within the primary
impact areas. Hence, compensating vegetation loss through reforestation
planting should be employed by the proponent. This can be done through
active planting within open areas of the Ipo watershed and near the water
transmission tunnel. Species that will be used for the reforestation must be
indigenous trees and/or fruit bearing trees endemic in the place that can attract
wildlife species that can help dispersed seeds for further regeneration. List of
species for planting has been listed from the dry season sampling report. More
importantly, reforestation effort should trigger reintroduction of species that
were previously found in the landscape.
(b) Land clearing can induce more threat to non-volant fauna to transfer from one
place to another. Hence, a biodiversity corridor to connect small forest
fragments from the affected sites to forest sites will be beneficial for such
species. As suggested above, reforestation planting should focus on
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reconnecting forests habitats in the area by building up the said biodiversity
corridor.
(c) The study still encouraged to observe the prohibition of wildlife
poaching/collection. The proponent should ensure that its employees must be
prohibited/warned/informed not to engage in any mode of wildlife collection
and/or hunting for the conservation and protection of remaining wildlife
species. Promote wildlife protection using innovative means such as putting
up of warning signages on strategic areas for public information and warning.
A more effective approach is to include environmental education as part of the
environmental planning in the area. The environmental educators can be
invited from education sectors, non-government organizations, or from expert
educators with support from the proponent.
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4 Key Environmental Issues
Key activities implemented
The following activities are currently implemented:
• Water quality monitoring
o Water quality monitoring is conducted monthly by CRL Laboratories in
Ipo/Angat River and Bigte Creek. CMC also procured portable
turbidimeter and Multi-meter to take in-situ measurements on the
established sampling points and bodies of water near the construction
sites.
• Air and Noise quality monitoring
o Ambient air quality monitoring is conducted quarterly by CRL Laboratories
o A sound level meter was procured by CMC to monitor the noise level
during construction period as one of the requirements of ADB and DENR.
o Tunnel air quality is monitored thru a built-in gas tester of the TBM.
• Freshwater ecology monitoring
o Freshwater ecology monitoring is done during dry and wet seasons.
• Terrestrial ecology monitoring
o Terrestrial ecology monitoring is done during dry and wet seasons.
Key Issues Identified
• Social and economic survey
o Target date of the socio-economic survey and monitoring to be
conducted by DOHWA:
March 2019 – Socio-economic survey of households within six
sitios
April 2019 - Socio-economic survey of households located
along access road to Ipo Dam or the primary impact area
• Social and environmental awareness
Bulletin boards for IEC purpose in the barangay halls of Brgys. Bigte and San
Mateo has been installed in June 2017; in Ipo Elementary School has been
purchased and installed in July 2017. The bulletin board has project information
and announcements.
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Photo 4. Bulletin Board at Ipo Elementary School.
Photo 5. Bulletin Board at Barangay Bigte
Public consultation on the updates of the project were held at Brgy San Mateo
Covered Court, Brgy. Bigte Multipurpose Hall on June 1, 2018 and at Ipo Dam
Open Parking Area on June 26, 2018. The public consultations were led by Engr.
Jojo Dorado of MWSS.
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Photo 6. Public Consultations in Brgy San Mateo and Brgy Bigte
The 1st community assembly was conducted on July 18, 2018 9:00 AM at MWSS
Powehouse in Sitio Bitbit, Barangay Lorenzo, Norzagaray, Bulacan. This was headed
by NCIP Bulacan Service Center as part of FPIC process for the Certification Pre-
Condition (CP) application of AWTIP (Appendix 8.8). The following were discussed to
the Indigenous Peoples (Dumagats) during the assembly:(a) results of FBI last August
2017; (b) RA 8371 and FPIC process; (c) overview of the project; (d) work and financial
plan for the conduct of FPIC; and, (e) other related matters.. Second community
assembly, also led by NCIP, was held on August 29, 2018. MOA Negotiation was led
by NCIP.
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Photo 7. First Community Assembly with Dumagats led by NCIP
Photo 8. Second Community Assembly with Dumagats led by NCIP, 29 August 2018
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5 Complaints
Details of Complaint/s
No grievance cases have been reported from July to December 2018 (Table 55). Previous reported valid grievance cases were already resolved. (Please see Jan-Dec 2017 SEMR)
Table 55. List of grievances as of December 2018
Invalid Grievance Cases 0
Unresolved Grievance Case from previous months
0
Pending Valid Grievance Cases 0
Resolved Grievance Cases to date 0
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6 Conclusion and Recommendation
Overall Progress of Implementation of Environmental Management Measures18
The overall progress can be assessed as very good. In construction activities, potential environmental impacts associated to tunnel construction are observed and proper mitigation measures indicated in EIA, IEE and CEMMP were followed. Different monitoring activities such as monthly water quality monitoring and quarterly ambient air quality and noise level monitoring are carried out by CRL Laboratories. CMC’s initiative to monitor noise and water thru their portable equipment are continuous. The TBM has built-in gas tester to monitor the quality of air inside the tunnel. Freshwater and terrestrial ecosystem monitorings are done during wet and dry seasons. Further, a water treatment plant is now operational to treat the tunnel’s effluent.
On the other hand, no social assessment has been done yet since the TBM started its operation.
18 Overall sector environmental management progress could be described in qualitative terms or be evaluated based on a ranking system,
such as the following: 1. Very Good 2. Good 3. Fair 4. Poor 5. Very Poor
Additional explanatory comments should be provided as necessary.
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7 Appendices
Site Works / Activities for the Period (July to November 2018)
(a) July 2018
(i) Inlet • Permanent Access Road
- Clearing and grubbing is completed except on the lifting zone area for slope stabilization
- Casting of road pavement Sta. 0+308 to 0+336 - Concreting of curbs and gutter at Sta. 0+623 to 0+657
(ii) Structures along Permanent Access Road - Soil nailing works at Sta. 0+530 and 0+765 - Shotcrete completion at Sta. 0+540 to 0+750 - Concreting of retaining wall foundation - Rebar and formworks of retaining wall - Laying and collaring of RC pipe culvert at Sta. 0+741
(iii) Outlet
- Conveyance Channel and Drainage System - Concreting of wall and top slab for manhole no. 4 and manhole no. 3 at the
conveyance channel area - Backfilling and compaction of pipe culvert between manhole 3 and 4 - Pipe laying of concrete from manhole 3 to manhole 5 - Laying and collaring of reinforced concrete pipe culvert between manhole 5
and overflow tank.
(iv) Tunnel and Portals
• Site Works (Bigte Area) & TBM Preparatory Works - Preparatory works completed.
• Tunnel Excavation - TBM excavation for the period is from Ch. 1+629.38 to Ch. 2+321.67 - Precast segment ring linings installed for the period is from ring no. 1245 to
1777 - Pea gravel backfilled for the period is between ring nos. 1243 to 1729 - Accumulated back-grouting from 285 to 301 cubic meter
• Precast Concrete Lining Segments
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There was a delay in the start of fabrication due to the late approval by the Client of the Fabricator’s Qualification Data and the submitted Method of Fabrications. Surpassing this, fabrications went on at a steady rate as expected. However, during this period, there was a supply shortage of concrete aggregates. Although a new supplier had been sourced, the available material’s specifications have to pass the required quality tests, resulting in the halt of works on February 20, 2018. Production resumed on March 13, 2018 after the 7-day strength of the trial mix passed the requirement.
(v) Geological and Geotechnical Works
• Tunnel Face Mapping - MAP-87 to 89 at Ch. 1+663.08 to Ch. 1+727.02 and MAP-93 is moderately
strong and highly fractured, dark greyish green, poly-volcanoclastic to medium-grained texture volcaniclastic Tuff. Joints are generally closely to medium-spaced discontinuity spacing, smooth to slicken sided, semi-undulating to planar joint planes, moderately narrow/gapped aperture, weakly altered joint walls with commonly quartz-calcite hard minerals joint coatings/infills. Fair-III Rock Class with dry groundwater condition.
- MAP-90 and 92 at Ch. 1+754.4 to Ch. 1+816.51 is moderately strong, dark greyish green, poly-volcanoclastic to medium-grained texture volcaniclastic Tuff. Joints are generally medium to widely spaced, slightly rough semi-undulating joint planes, tight aperture, slight to moderately altered joint walls with commonly calcite-hematite soft mineral joint infills/coatings and observed limestone fragments at Ch. 1+816.51. Good-II Rock Class with dry groundwater condition.
- MAP-94 and 95 at Ch1+887.23 to Ch1+907.63 is weak to moderately strong, dark brownish gray, coarse medium-grained clastic texture Greywacke. Joints are generally medium to widely spaced random joints and box jointing, slightly rough semi-undulating joint planes, narrow aperture, slight to moderately altered joint walls with commonly calcite-hematite-clay hard and soft mineral joint infills/coatings. Noted an inferred lithological contact of weak fractured thin layer brownish gray of claystone (GU3) at Ch. 1+887.23. Poor-IV to Good-II Rock Class with dry groundwater condition.
- MAP-96 and 97 at Ch. 1+937.81 to Ch. 1+959.94, MAP-102 to 103 at Ch. 2+105.66 to Ch. 2+130.57 and MAP-105 at Ch. 2+188.56 is moderately strong with brittle fracturings, dark greenish gray, fine medium-grained texture Basaltic Tuff. Joints are generally medium to widely spaced, slightly rough semi-undulating joint planes, narrow to tight aperture, slight to moderately altered joint walls with commonly calcite-hematite-clay hard and
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soft mineral joint infills/coatings. Occasional fine quartz-calcite±hematite veining. Fair-III to Good-II Rock Class with dry groundwater condition.
- MAP-98 to 100 at Ch. 2+005.51 to Ch. 2+061.48 and MAP-101 at Ch. 2+082.40 is moderately strong with brittle fracturings, dark greenish gray, medium-grained to volcanoclastic in texture Volcanic Tuff. Joints are generally closely to medium spaced, slightly rough with semi-undulating joint planes with tight aperture, slight to moderately altered joint walls with commonly calcite-hematite-clay hard and soft mineral joint infills/coatings and presence of hematite stains in some portion of the wall rock. Fair-III to Good-II Rock Class with dry groundwater condition.
- MAP-104 at Ch. 2+166.51 and MAP-108 to 109 at Ch. 2+247.33 to Ch. 2+294.29 is moderately strong, dark greenish gray, medium-grained in texture Andesitic Tuff. Joints are generally medium to widely spaced, slightly rough to slicken sided with semi-undulating joint planes and tight aperture, slight to moderately altered joint walls with commonly quartz-calcite-hematite hard mineral joint infills/coatings. Minor fault was observed with approximate thickness of 80-100mm filled with oxidized gougy-clay materials at Ch. 2+166.51. Fair-III to Good-II Rock Class with dry groundwater condition.
- MAP-106 to 107 at Ch. 2+209.69 to Ch. 2+227.95 is moderately strong and
fractured rock, dark greenish gray, fine medium-grained in texture Basaltic Tuff. Joints are generally medium to widely spaced, roughness is smooth to slightly rough with semi-undulating joint planes and tight aperture, slight to moderately altered joint walls with commonly quartz-calcite-hematite hard mineral joint infills/coatings. GU2; Andesitic Tuff lense was observed with approximate thickness of ±0.40m at Ch. 2+209.69. Fair-III Rock Class with dry groundwater condition.
• Geological Probing Forecast Ahead of the Tunnel Face - PD-TBM-22 at Ch. 2+121.60 to Ch. 2+152.0 intercepted a Fair-III Rock
Class of fresh to altered Volcaniclastic Tuff and Basaltic Tuff (GU2) with an average penetration rate of 0.43 m/min.
- PD-TBM-23 at Ch. 2+200.7 to Ch. 2+228.2 intercepted a Good–II to Fair-III Rock Class of Fresh Basaltic tuff to altered Basaltic Tuff (GU2) with an average penetration rate of 0.56 m/min.
- PD-TBM-24 at Ch. 2+238.3 to Ch. 2+267.3 intercepted a Good–II to Fair-III Rock class of Fresh Andesitic Tuff to altered Andesitic Tuff (GU2) and encountered minor fault at Ch. 2+255.7 to Ch. 2+257.2. The average penetration rate is 0.66 m/min.
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• Geological Interpretation for Tunnel - The interpreted as-built geological section for five hundred (500) meter
excavation has already been submitted. MAP-TBM 01 to 10 and the other 500 meters is in progress.
- Rock Core Ref. no. GC-04 was taken for rock strength testing in the laboratory or UCS testing to verify the strength parameter of RMR.
(b) August 2018
(i) Inlet
• Permanent Access Road
- Balance road to complete is put on hold due to potential high risk of landslide around Ipo area.
- Conducting LIDAR survey for data record and investigation of landslide at Ipo area.
• Structures along Permanent Access Road (Inlet)
- Concrete pavement at Japanese bridge left lane. - Installation of guard rail - Shotcrete works along Sta. 510 to 540 - Continuous works on curbs and gutters - Drilling of boreholes for investigation of landslide
(ii) Outlet
• Conveyance Channel and Drainage System - Base course laying, compaction and Field Density test at Bigte access road
at conveyance channel area - Complete restoration of road pavement at conveyance channel area - Installation of manhole cover no. 3, 4 & 5 at conveyance channel area - Construction of sump pit at industrial area - Concrete pavement of Tippler Access road
(iii) Tunnel and Portals
• Tunnel Excavation - TBM excavation for the period is from Ch. 2+321.67 to Ch. 3+132 - Precast segment ring linings installed for the period is from ring no. 1777 to
2395
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- Pea gravel backfilled for the period is between ring nos. 1729 to 2392 - Accumulated back-grouting from 301 to 568 cubic meter
• Precast Concrete Lining
There was a delay in the start of fabrication due to the late approval by the Client of the Fabricator’s Qualification Data and the submitted Method of Fabrications. Surpassing this, fabrications went on at a steady rate as expected. However, during this period, there was a supply shortage of concrete aggregates. Although a new supplier had been sourced, the available material’s specifications have to pass the required quality tests, resulting in the halt of works on February 20, 2018. Production resumed on March 13, 2018 after the 7-day strength of the trial mix passed the requirement.
(iv) Geological and Geotechnical Works
• Tunnel
Tunnel Face Mapping to the Excavated Area
- MAP-110 at Ch. 2+321.66 is moderately strong and highly fractured, dark greyish green, fine medium-grained in texture Andesitic Tuff. Joints are generally medium to widely-spaced discontinuity spacing, slicken sided, semi-undulating to planar joint planes, moderately narrow/gapped aperture, weakly altered joint walls with commonly quartz-calcite hard minerals joint coatings/infills. Noted inferred contact of (GU3) Claystone, thin-layer lense, bownish gray with weak strength. Fair-III Rock Class with dry groundwater condition.
- MAP-111 to MAP-113 at Ch. 2+355.39 to Ch. 2+418.05 is moderately strong, dark brownish grey, coarse medium-grained in texture Claystone. Joints are generally closely to medium-spaced, slicken sided with semi-undulating joint planes and tight aperture, slight to moderately altered joint walls with commonly quartz-calcite-hematite hard mineral joint infills/coatings. Minor fault was observed at Ch. 2+355.39, cutting the hematite vein 50 to 80mm thickness. Fair-III to Poor-IV Rock Class with dry groundwater condition.
- MAP-114 to 115 at Ch. 2+476.67 to Ch. 2+513.21 and MAP-126 at 2+885.07 is weak to moderately strong, dark greyish grey, medium-grained clastic texture Greywacke. Joints are generally closely to widely spaced random joints and criss-crossing jointing, roughness is stepped-slicken sided to slicken sided undulating joint planes, moderately narrow aperture, slight to moderately altered joint walls with commonly calcite-hematite-clay hard and soft mineral joint infills/coatings. Noted wet groundwater condition (0.081 l/min) at Ch. 2+513.21. Poor-IV to Fair-III Rock Class with wet to dry groundwater condition.
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- MAP-116 to 119 at Ch. 2+541.56 to Ch. 2+644.42 and MAP-127 to MAP-128 at 2+934.55 to Ch. 3+004.86 is massive with brittle fracturing, dark greenish grey, fine medium-grained clastic texture Andesitic Tuff. Joints are generally medium to widely-spaced joints healed with quartz-calcite minerals, roughness is slightly rough to slicken sided semi-undulating joint planes, moderately narrow/gapped to tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. The wall rock is abundant in dark colored minerals (pyroxene and hornblende) and occasional fine quartz-calcite veining’s in some portion along wall rock. Noted micro fault (20 to 30mm thickness) with water seepage measured 0.75 l/min at Ch. 2+644.42. Good-II to Fair-III Rock Class with wet to dry groundwater condition.
- MAP-120 at Ch. 2+679.42, dark greenish grey, fine medium-grained clastic texture Basaltic Tuff. Joints are widely-spaced joints filled with calcite±quartz minerals, slightly rough with semi-undulating joint planes, tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. The wall rock is abundant in dark colored minerals (pyroxene and hornblende), massive with brittle fracturings. Fair-III Rock Class with dry groundwater condition.
- -MAP-121 to MAP-125 at Ch. 2+706.74 to Ch. 2+808.25, dark greyish green, fine-grained aphanitic texture of Andesite. Joints are closely to widely-spaced joints filled with calcite±quartz minerals, slightly rough with semi-undulating joint planes, tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. The wall rock is massive with only few fracturings. Noted two micro fault with water seepage at Ch. 2+735.45. Fair-III to Good-II Rock Class with wet to dry groundwater condition.
- MAP-129 at Ch. 3+083.87, dark greenish grey, coarse medium-grained texture Basaltic Tuff. Joints are medium-spaced joints filled with calcite±hematite minerals, smooth with undulating to step joint planes, moderately narrow aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. Noted an inferred lithologic contact of GU2; Greywacke within the basaltic tuff wall rock. The greywacke is moderately strong with brittle fracturings. Fair-III Rock Class with dry groundwater condition.
Geological Probing Forecast Ahead of the Tunnel Face
- PD-TBM-25 at Ch. 2+415.172 to Ch. 2+445.6 intercepted a Good–II to Fair-III Rock class of Fresh Claystone to altered Claystone (GU3) and encountered minor fault at Ch. 2+423.9 to Ch. 2+429.7. The average penetration rate is 0.97 m/min.
- PD-TBM-26 at Ch. 2+504.2 to Ch. 2+534.6 intercepted a Fair-III Rock class of altered Greywacke (GU2) and encountered three minor fault at (1) Ch. 2+507.1 to Ch. 2+515.8 (2) Ch. 2+518.7 to Ch. 2+520.2 (3) Ch. 2+523 to Ch. 2+527.4. The average penetration rate is 1.14 m/min.
- PD-TBM-27 at Ch. 2+799.3 to Ch. 2+828.20 intercepted a Fair-III Rock class of altered Andesite (GU2) and encountered two minor fault at (1) Ch. 2+802.1 to Ch.
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2+818.1 and at Ch. 2+821.0 to Ch. 2+822.4. The average penetration rate is 1.15 m/min.
- PD-TBM-28 at Ch. 2+876.1 to Ch. 2+905.0 intercepted a Fair-III Rock class of altered Greywacke (GU2) and encountered minor fault at Ch. 2+877.50 to Ch. 2+886.20. The average penetration rate is 1.0 m/min.
- PD-TBM-29 at Ch. 2+904.805 to Ch. 2+933.8 intercepted a Fair-III Rock class of altered Greywacke (GU2) and encountered minor fault at Ch. 2+906.3 and at Ch. 2+928.0. The average penetration rate is 0.83 m/min.
- PD-TBM-30 at Ch. 2+925.6 to Ch. 2+951.6 intercepted a Fair-III Rock class of altered Andesitic tuff (GU2) and encountered minor fault at Ch. 2+931.3. The average penetration rate is 0.95 m/min.
Geological Interpretation for Tunnel
- The interpreted as-built geological section for five hundred (500) meter excavation has already been submitted MAP-TBM 01 to 10. MAP-TBM-11 to 20 is in progress.
- Rock Core Ref. no. GC-05 was taken for rock strength testing in the laboratory or UCS testing to verify the strength parameter of RMR.
(c) September 2018
(i) Inlet • Permanent Access Road
- Balance road to complete is still put on hold due to potential high risk of landslide around
Ipo area - Conducting LIDAR survey is on-going for data record and investigation of landslide at
Ipo area - Installation of Lego concrete blocks at Sta. 0 + 770 to Sta. 0 + 800
• Structures along Permanent Access Road (Inlet) - Repair works at Japanese bridge. - Saw cutting of road pavement, contraction joint for expansion joint including bitumen
application - Repair works from Sta. 0 + 020 to Sta. 0 + 741 - Drilling of boreholes for investigation of landslide
(ii) Outlet
• Conveyance Channel and Drainage System - Nothing to report for the period.
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(iii) Tunnel and Portals
• Tunnel Excavation - TBM excavation for the period is from Ch. 3+125.89 to Ch. 3+979.74 - Precast segment ring linings installed for the period is from ring no. 2395 to 3051 - Pea gravel backfilled for the period is between ring nos. 2392 to 3048 - Back-grouting works at 275.79 cu.m.
• Precast Concrete Lining Productions
- There was a delay in the start of fabrication due to the late approval by the Client of the
Fabricator’s Qualification Data and the submitted Method of Fabrications. However, the production improved compared to that of last month. The production increased by 2.47% for the period (compared to last month), from 1,859 nos. to 1,905 nos.
(iv) Geological and Geotechnical Works
• Tunnel
Tunnel Face Mapping to the Excavated Area
- MAP-130 at Ch. 3+164.658, dark greenish grey, coarse medium-grained in texture of
Greywacke with inferred contact to Basaltic Tuff. Joints are medium-spaced joints filled with hard minerals, smooth to with undulating to step joint planes, moderately narrow apertures, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. The wall rock is massive with brittle fracturings. Fair-III Rock Class with dry groundwater condition.
- MAP-131 to MAP-134 at Ch. 3+193.14 to Ch. 3+279.06 and MAP-140 to MAP-142 at Ch. 3+573.42 to Ch. 3+647.54, dark greyish to dark greyish green, medium to fine-grained aphanitic texture of Andesite. Joints are closely to widely-spaced joints filled with calcite-quartz±hematite minerals, slightly rough to slicken sided with semi-undulating joint planes, narrow/gapped to tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. The wall rock is massive with only few fracturings. Good-II to Fair-III Rock Class with dry groundwater condition.
- MAP-136 to MAP-137 at Ch. 3+378.50 to Ch. 3+419.82, dark greenish grey, fine
medium-grained texture Andesitic Tuff. Joints are closely to widely-spaced joints filled with quartz-calcite±hematite minerals, slightly rough to slicken sided with semi-undulating joint planes, moderately narrow aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. Observed presence of
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pyrite mineral and volcanic clast in some portion of thw wall rock. Fair-III Rock Class with dry groundwater condition.
- MAP-138 at Ch. 3+431.86, dark green, medium-grained texture with highly visible mafic
minerals of Basaltic Tuff. Joints widely-spaced joints filled with quartz-calcite±hematite minerals, slightly rough with semi-undulating joint planes, tight aperture. Observed presence of pyrite mineral and volcanic clast in some portion of the wall rock. Good-II Rock Class with dry groundwater condition.
- MAP-139 at Ch. 3+535.55, dark greenish gray, coarse medium-grained texture of
Greywacke with inferred lithologic contact of Andesitic tuff. Joints are medium-spaced joints filled with calcite±hematite minerals, slightly rough with semi-undulating to step joint planes, moderately narrow/gapped to tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. The wall rock is moderately strong with brittle fracturings. Fair-III Rock Class with dry groundwater condition.
- MAP-143 to MAP-144 at Ch. 3+689.15 to Ch. 3+806.33, dark greenish gray, coarse
medium-grained texture of Greywacke. Joints are medium to closely-spaced joints filled with soft minerals, slightly rough with semi to undulating joint planes, very narrow/gapped aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. Noted water seepage at Ch. 3+689.15 with estimated measurement of 1.0 l/min and at Ch. 3+806.33 with measurement of 0.246 l/min. The wall rock is moderately strong in appearance but with brittle fracturings. Fair-III Rock Class with dry groundwater condition.
- MAP-135 at Ch. 3+354.87 and MAP-145 to MAP-149 at Ch. 3+845.38 to Ch. 3+979.74,
dark brownish gray, earth like in appearance and semi-foliated to sheeted-foliated in texture Claystone/Argillaceous Shale with Limestone lenses. Joints are closely to medium-spaced joints filled with soft minerals, slightly rough to slicken sided with semi to undulating joint planes, very narrow/gapped aperture. The rock exhibits graded fine layers of claystone, mudstone and argillaceous shale mottled with gravel size strained limestone fragments. Observed decimeter thick minor fault along joint beddings with gouge material infills at Ch. 3+868.79 to Ch. 3+897.39. Fair-III to Poor-IV Rock Class with dry groundwater condition.
Geological Probing Forecast Ahead of the Tunnel Face
- PD-TBM-33 at Ch. 3+856.8 to Ch. 3+885.8 intercepted a Poor–IV to Fair-III Rock class of slightly weathered Claystone/Argillaceous Shale (GU3). The average penetration rate is 1.20 m/min.
- PD-TBM-34 at Ch. 3+888.4 to Ch. 3+904.3 intercepted a Poor–IV to Fair-III Rock class of slightly weathered and oxidized Claystone/Argillaceous Shale (GU3). The average penetration rate is 1.39 m/min.
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- PD-TBM-35 at Ch. 3+905.3 to Ch. 3+931.4 intercepted a Fair-III to Poor-IV to Fair-III Rock class of slightly weathered and oxidized Claystone/Argillaceous Shale (GU3). The weak zone of the Oxidizes Claystone is at Ch. 3+908.2 to Ch. 3+912.6, Ch. 3+915.5 to Ch. 3+919.8, Ch. 3+925.6 to Ch. 3+927.0 and Ch. 3+929.9. The average penetration rate is 1.20 m/min.
- PD-TBM-36 at Ch. 3+943.8 to Ch. 3+972 intercepted a Fair-III to Poor-IV to Fair-III Rock class of slightly weathered and oxidized Claystone/Argillaceous Shale (GU3). The suspected weakzone of the slightly weathered Claystone is at Ch. 3+948.1 to Ch. 3+964.1 and Ch. 3+968.4 to Ch. 3+969.9. The average penetration rate is 1.26 m/min.
Geological Interpretation for Tunnel
- The interpreted as-built geological section for five hundred to one thousand (500-1000) meter excavation will be submitted MAP-TBM-11 to 20. MAP-TBM-21 to 30 is in progress.
(d) October 2018
(i) Inlet
• Permanent Access Road - Backfilling and compaction works from Sta. 0 + 770 up to Sta. 0 + 830 (leading up
to the temporary ramp). - Slope cutting and shotcreting works at Sta. 0 + 830 to 840. - Completion of curbs and gutter at Sta. 0 + 620 to 640. - Continuous LIDAR survey for data record and investigation of landslide at Ipo area.
• Structures along Permanent Access Road (Inlet)
- Soil nailing works. - Drainage pipes drilling works.
(ii) Outlet
• Conveyance Channel and Drainage System - Nothing to report for the period.
(iii) Tunnel and Portals
• Tunnel Excavation
- TBM excavation for the period is from Ch. 3+979.74 to Ch. 4+875.72 (a total of
895.98 m). - Precast segment ring linings installed for the period is from ring no. 3051 to 3740 - Pea gravel backfilled for the period is between ring nos. 3048 to 3737 - Back-grouting works at 236.30 cu.m.
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• Precast Concrete Lining Productions - As of October 2018, about 80% of the total number of ring segments had already
been manufactured, wherein 75% were already delivered to the site. - CMC / Frey Fil had encountered a shortage in the supply of cement which affected
the production of precast segment. The manufactured number of segment lining for the period had decreased to 1,390 nos.
- CMC had agreed to manage the mentioned shortage of supply in order to have a continuous production.
(iv) Geological and Geotechnical Works
• Tunnel Tunnel Face Mapping to the Excavated Area
- MAP-150 at Ch. 3+979.74, dark brownish gray, earth like in appearance and semi-
foliated to sheeted-foliated in texture Claystone/Argillaceous Shale with Limestone lenses. Joints are closely to medium-spaced joints filled with soft minerals, slightly rough to slicken sided with semi to undulating joint planes, very narrow/gapped aperture. The rock exhibits graded fine layers of claystone, mudstone and argillaceous shale mottled with gravel size strained limestone fragments. Poor-IV Rock Class with dry groundwater condition.
- MAP-151 to MAP-153 at Ch. 4+015.74 to Ch. 4+088.67, dark greenish gray to
blackish, fine medium-grained texture of Metasediment. Joints are medium-spaced joints filled/coated with calcite-quartz minerals, slicken sided with semi-undulating joint planes with tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. The wall rock is moderately strong with conchoidal fracturings and flaky rock cleavage. Fair-III Rock Class with dry groundwater condition and slightly oxidized.
- MAP-154 to MAP-155 at Ch. 4+104.33 to Ch. 4+122.64, dark greenish gray to
blackish, fine to clastic texture of Metasediment (Marbleized Limestone and Shaly Sandstone). The rock is dense with weak metallic elements. Joints are generally widely-spaced joints filled/coated with calcite and clay minerals, slicken sided with semi-undulating joint planes with tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. Observed lenses of greenish gray marbleized limestone intercalated on the clastic wall rock. The wall rock is moderately strong with conchoidal fracturings and flaky rock cleavage. Fair-III Rock Class with dry groundwater condition and slightly oxidized.
- MAP-156 at Ch. 4+153.82, dark greenish gray to blackish, fine medium-grained
texture of Metavolcanics/Faulted rocks (Fault zone). The rock is dense with weak
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metallic elements. The observed fault is slickensided infilled with soft gouge materials. The wall rock is highly fractured and has flaky rock cleavage. Fair-III Rock Class with dry groundwater condition and slightly oxidized.
- MAP-157 to MAP-158 at Ch. 4+177 to Ch. 4+198.01, dark greenish gray to blackish
gray, fine medium-grained texture of Metavolcanics (Andesite). Joints are closely to widely-spaced joints filled with calcite minerals, slickensided with semi-undulating to step joint planes, moderately narrow/gapped to tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. The wall rock is slightly fractured and has flaky rock cleavage. Fair-III Rock Class with dry groundwater condition and slightly oxidized.
- MAP-159 to MAP-160, MAP-162 to MAP-163,MAP-165 and MAP-177 at Ch.
4+235.65 to Ch. 4+273.49, Ch. 4+344.19 to Ch. 4+355.41, Ch. 4+424.54 and Ch. 4+875.72, dark greenish gray to blackish gray, fine medium-grained amygdaloidal texture of Andesite Flow. Joints are closely to widely-spaced joints filled with calcite-quartz minerals, slightly rough to slicken sided with semi-undulating to planar joint planes, moderately narrow/gapped to tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. At Ch. 4+875.72, there is noted crackle joint fractures zone infilled with calcite-quartz minerals at upper and lower part of tunnel face with no clear orientation of discontinuity. The wall rock is strong to moderately strong with some fracturings. Good-II to Fair-III Rock Class with dry groundwater condition.
- MAP-161,MAP-172 to MAP-176, at Ch. 4+286.16 , Ch. 4+711.41 to Ch. 4+835.55,
dark greenish gray, coarse-grained amygdaloidal to brecciated texture of Andesitic Tuff-Breccia. Joints are closely to medium-spaced joints filled with calcite-quartz±hematite minerals, slightly rough to slicken sided with semi-undulating to planar joint planes, moderately narrow/gapped to tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. At Ch. 4+286.16 and Ch. 4+803.15, there is noted indurated fault with compacted fault gouge. The wall rock is strong to moderately strong with some fracturings. Good-II to Fair-III Rock Class with dry groundwater condition.
- MAP-164, at Ch. 4+398.38, whitish gray, clastic fine-grained texture of Quartz-
sandstone. Joints are closely-spaced joints healed with calcite-quartz minerals, slightly rough to slicken sided with semi-undulating to planar joint planes, with tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. The wall rock is slightly fractured. Poor-IV Rock Class with dry groundwater condition.
- MAP-166 to MAP-167, at Ch. 4+458.21 to Ch. 4+486.83, dark greenish gray to
blackish gray, fine-medium grained with amygdaloidal to brecciated texture of Volcanics (Andesitic rock). Joints are closely to widely-spaced joints with calcite-
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quartz-hematite banded infill minerals, slightly rough with semi-undulating to planar joint planes, with tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. The wall rock is strong with platy fracturings. Good-II to Fair-III Rock Class with dry to damp groundwater condition.
- MAP-168 to MAP-169, at Ch. 4+574.74 to Ch. 4+605.28, dark green to blackish
gray, fine-medium grained with amygdaloidal to brecciated texture of Volcanics (Basaltic andesite rock). Joints are medium to widely-spaced joints with calcite-quartz-hematite infills, slightly rough with semi-undulating to stepped joint planes, with tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. The wall rock is strong with brittle fracturings. Good-II Rock Class with dry groundwater condition.
- MAP-170 to MAP-171, at Ch. 4+640.42 to Ch. 4+674.35, dark green to blackish
gray, fine-medium grained brecciated texture of Volcanics (Basaltic rock). Joints are mclosely to widely-spaced joints with calcite-quartz-hematite infills, slightly rough with semi-undulating to planar joint planes, moderately narrow/gapped to tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. The wall rock is strong with brittle fracturings. Fair-III to Good-II Rock Class with dry groundwater condition.
Geological Probing Forecast ahead of the Tunnel Face
- PD-TBM-37 at Ch. 3+979.7 to Ch. 4+007.3 intercepted a Fair-III to Poor-IV to Fair-III
class of slightly weathered Claystone/Argillaceous Shale (GU3). The weak zone of the oxidized Claystone is at Ch. 3+982.6 to Ch. 3+987.0, Ch. 3+991.3 to Ch. 3+994.2.The average penetration rate is 1.15 m/min.
- PD-TBM-38 at Ch. 4+006.8 to Ch. 4+035.7 intercepted a Fair-III to Poor–IV to Fair-III Rock class of slightly weathered Metasediment (GU1). The weak zone of the sligthly weathered Metassediment is at Ch. 4+009.7 to Ch. 4014.0. The average penetration rate is 1.05 m/min.
- PD-TBM-39 at Ch. 4+039.2 to Ch. 4+068.2 intercepted a Fair-III to Poor-IV to Fair-III Rock class of altered to slightly weathered Metasediment (GU1). The weak zone of the slightly weathered Metassediment is at Ch. 4+047.9 to Ch. 4+055.2. The average penetration rate is 1.06 m/min.
- PD-TBM-39 at Ch. 4+039.2 to Ch. 4+068.2 intercepted a Fair-III to Poor-IV to Fair-III Rock class of altered to slightly weathered Metasediment (GU1). The weak zone of the slightly weathered Metassediment is at Ch. 4+047.9 to Ch. 4+055.2. The average penetration rate is 1.06 m/min.
- PD-TBM-40 (Center) at Ch. 4+079.7 to Ch. 4+108.6 intercepted a Fair-III to Poor-IV to Fair-III Rock class of altered to slightly weathered Metasediment/Shaly Sandstone (GU1). The weak zone of the slightly weathered Metassediment is at Ch. 4+094.2 to Ch. 4+095.6 and Ch. 4+100.0. The average penetration rate is 1.02 m/min.
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- PD-TBM-40 (Left side) at Ch. 4+079.7 to Ch. 4+108.6 intercepted a Fair-III to Poor-IV to Fair-III Rock class of altered to slightly weathered Metasediment/Shaly Sandstone (GU1). The weak zone of the slightly weathered Metassediment is at Ch. 4+088.4 and Ch. 4+097.1. The average penetration rate is 0.95 m/min.
- PD-TBM-40 (Right side) at Ch. 4+079.7 to Ch. 4+108.6 intercepted a Fair-III to Poor-IV to Fair-III Rock class of altered to slightly weathered Metasediment/Shaly Sandstone (GU1). The weak zone of the sligthly weathered Metassediment is at Ch. 4+088.4. The average penetration rate is 0.97 m/min.
- PD-TBM-41 (Center) at Ch. 4+095.3 to Ch. 4+124.3 intercepted a Fair-III to Poor-IV to Fair-III Rock class of altered to slightly weathered Metasediment/Shaly Sandstone (GU1). The weak zone of the sligthly weathered Metassediment is at Ch. 4+104.0. The average penetration rate is 0.83 m/min.
- PD-TBM-41 (Left side) at Ch. 4+104.3 to Ch. 4+130.4 intercepted a Fair-III Rock class of altered Metasediment/Shaly Sandstone (GU1). The average penetration rate is 0.81 m/min.
- PD-TBM-41 (Right side) at Ch. 4+095.3 to Ch. 4+124.3 intercepted a Fair-III to Poor-IV to Fair-III Rock class of altered to slightly weathered Metasediment/Shaly Sandstone (GU1). The weak zone of the sligthly weathered Metassediment is at Ch. 4+099.7, Ch. 4+102.6,Ch. 4+105.5 and Ch. 4+115.6. The average penetration rate is 1.02 m/min.
- PD-TBM-42 at Ch. 4+113.6 to Ch. 4+142.6 intercepted a Fair-III to Poor-IV to Fair-III Rock class of altered to slightly weathered Metasediment/Shaly Sandstone (GU1). The weak zone of the sligthly weathered Metassediment is at Ch. 4+119.4 to Ch. 4+131.0, Ch. 4.135.4 to Ch. 4136.8 and Ch. 4+141.2. The average penetration rate is 1.13 m/min.
- PD-TBM-43 at Ch. 4+144.8 to Ch. 4+176.7 intercepted a Fair-III to Poor-IV to Fair-III Rock class of slightly to Highly fractured Faulted rock (GU5) along Metavolcanics. The fault zone of the Highly fractured rock is at Ch. 4+147.7 to Ch. 4+157.9 and Ch. 4+165.1. The average penetration rate is 1.12 m/min.
- PD-TBM-44 at Ch. 4+162.9 to Ch. 4+191.8 intercepted a Good-II to Fair-III to Good-II Rock class of slightly fractured to fresh sound Metavolcanics (GU1). The average penetration rate is 1.05 m/min.
- PD-TBM-45 at Ch. 4+189.0 to Ch. 4+218.9 intercepted a Good-II to Fair-III to Good-II Rock class of slightly fractured to fresh sound Metavolcanics (GU1). The average penetration rate is 1.01 m/min.
- PD-TBM-46 at Ch. 4+226.7 to Ch. 4+255.6 intercepted a Good-II to Fair-III to Good-II Rock class of slightly fractured to fresh sound Metavolcanics (GU1). The average penetration rate is 0.92 m/min.
- PD-TBM-47 at Ch. 4+264.5 to Ch. 4+293.5 intercepted a Good-II to Fair-III to Good-II Rock class of slightly fractured to fresh sound Metavolcanics-Andesite flow (GU1). The average penetration rate is 0.99 m/min.
- PD-TBM-48 at Ch. 4+335.2 to Ch. 4+364.2 intercepted a Good-II to Fair-III to Good-II Rock class of slightly fractured to fresh sound Metavolcanics-Andesite flow (GU1). The average penetration rate is 0.90 m/min.
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- PD-TBM-49 at Ch. 4+346.4 to Ch. 4+373.9 intercepted a Good-II to Fair-III to Good-II Rock class of slightly fractured to fresh sound Metavolcanics-Andesite flow (GU1). The average penetration rate is 0.89 m/min.
- PD-TBM-50 at Ch. 4+389.4 to Ch. 4+418.4 intercepted a Good-II to Fair-III to Good-II Rock class of slightly fractured to fresh sound altered Quartz Sandstone (GU1). The average penetration rate is 1.18 m/min.
- PD-TBM-51 at Ch. 4+415.5 to Ch. 4+443.1 intercepted a Good-II to Fair-III to Good-II Rock class of slightly fractured to fresh sound Metavolcanics-Andesite flow (GU1). The average penetration rate is 0.97 m/min.
- PD-TBM-52 at Ch. 4+702.4 to Ch. 4+729.9 intercepted a Good-II to Fair-III to Good-II Rock class of slightly fractured to fresh sound Volcanics-Andesite tuff (GU1). The average penetration rate is 0.93 m/min.
Geological Interpretation for Tunnel
- The interpreted as-built geological section for five hundred to one thousand (1000 to 1500) meter excavation will be submitted, MAP-TBM-21 to 30. MAP-TBM-31 to 40 is in progress.
(e) November 2018
(i) All site facilities were completed in July 2017.
(ii) Inlet
• Permanent Access Road - Excavation to required elevation from Sta. 0+827 to Sta. 0+865.
• Structures along Permanent Access Road (Inlet) - Soil nailing works. - Drainage pipes installation. - Shotcreting works (second layer).
(iii) Outlet
• Conveyance Channel and Drainage System - Nothing to report for the period.
(iv) Tunnel and Portals
• Tunnel Excavation - TBM excavation for the period is from Ch. 4+875.72 to Ch. 5+676.231 (a total of 800.51
m). - Precast segment ring linings installed for the period is from ring no. 3740 to 4356.
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- Pea gravel backfilled for the period is between ring nos. 3737 to 4353. - Back-grouting works at 546.10 cu.m. (production increased from only 236.30 cu.m. last
month).
• Precast Concrete Lining Segments - As of November 2018, about 90% of the total number of ring segments had already
been manufactured, wherein 88% were already delivered to the site. - The manufactured number of segment lining for the period had increased from 1,390
last month to 2,440 for the period, indicating that the reported shortage of the supply of cement last month had been successfully managed.
(v) Geological and Geotechnical Works
• Tunnel
Tunnel Face Mapping to the Excavated Area
- MAP-178 to 180 at Ch. 4+916.36 to Ch. 4+981.22, dark greenish gray, fine medium-grained aphanitic texture of moderately strong Basalt. Joints are closely to medium-spaced joints filled with soft minerals, undulating to stepped-smooth roughness and has tight aperture. The rock assemblage is mafic rich show a high presence of dark silicates. Fair-III to Good-II Rock Class with dry groundwater condition.
- MAP-181 to MAP-184 at Ch. 5+014.73 to Ch. 5+119.27 and MAP-186 to MAP-188 at Ch. 5+187.00 to Ch. 5+301.38, dark gray to dark greenish gray , medium to fine medium-grained aphanitic texture of strong Andesite. Joints are closely to medium-spaced joints filled/coated with calcite-quartz hard minerals, stepped rough to slicken sided with semi-undulating joint planes, narrow/gapped to tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. At Ch. 5+014.73 and Ch. 5+119.27, a minor fault was observed filled with indurated gouge with thickness of 50-80mm. The wall has a strong intact rock, Good-II Rock Class with dry groundwater condition.
- MAP-185 at Ch. 5+150.58 , dark gray to dark grayish green , coarse medium –grained brecciated to aphanitic texture of moderately strong Andesite. Observed joints are randomly discontinuous closely to medium-spaced joints filled/coated with calcite-quartz±hematite hard minerals, slightly rough to slicken sided with semi-undulating joint planes, narrow/gapped to tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. A minor fault was observed filled with indurated gouge with thickness of 40-50mm. The wall rock is moderately strong, Fair-III Rock Class with dry groundwater condition.
- MAP-189 to 190 at Ch. 5+339.26 to Ch. 5+376.71 and MAP-195 to MAP-196 at Ch. 5+595.58 to Ch. 5+630.61 , dark greenish gray, medium –grained agglomeratic texture Tuff. Joints are closely to medium-spaced joints filled/coated with calcite-quartz±hematite hard minerals, slightly rough to slicken sided with semi-undulating joint planes, narrow/gapped to tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings. A minor fault was observed at Ch.
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5+339.26, filled gray gouge clay material with thickness of 0.8m. Portions of wall rock has blocky fragments of volcanic materials (rounded to sub-rounded), 50 to 100mm clast size. The wall rock is moderately strong, Fair-III to Good-II Rock Class with dry groundwater condition.
- MAP-191 to 194 at Ch. 5+310.68 to Ch. 5+552.65 and MAP-197 at Ch. 5+652.80, dark green, fine medium-grained texture of strong and massively intact Basalt. Joints are closely to medium-spaced joints filled/coated with calcite-quartz±hematite hard minerals, slightly rough to rough with semi-undulating joint planes, narrow/gapped to tight aperture, slight to moderately altered joint walls with commonly hard and soft mineral joint infills/coatings and moderate veinings and stockworks. The wall rock is strong, Good-II Rock Class with dry groundwater condition.
- Geological Probing Forecast ahead of the Tunnel Face - PD-TBM-52 at Ch. 5+586.6 to Ch. 5+615.6 intercepted a Good-II class of Fresh sound
Tuff Agglomeratic (GU1). The average penetration rate is 0.78 m/min. Geological Interpretation for Tunnel
- The interpreted as-built geological section for one thousand five hundred to three thousand (1500 to 3000) meter excavation is in progress.
Progress Photos (as of December 2018)
(a) Inlet
Figure 9. Shotcreting Sta. 0+520 to 0+540 (2nd layer)
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Figure 10. Drilling works for the Piezometer Sta. 0+760
Figure 11. Installation of Piezometer at Sta. 0+775
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Figure 12. Restoration/ repair of silt curtain
Figure 13. Drilling works for soil nails at Sta. 0+530
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Figure 14. Drilling works for soil nails at Sta. 0+865
Figure 15. Shotcrete at Sta. 0 + 860 (2nd layer)
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Tunnels/Portals
Figure 16. Tunnel ring no. 4180
Figure 17. Clearing and grubbing of grass and shrubs on the sides slopes of the railway embankment along aqueduct
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Figure 18. Hauling of tunnel muck materials
Figure 19. Loading of precast concrete segment lining on the train cars
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Figure 20. Wagon Tippler in operation
Figure 21. Construction of drainage canal and bund wall at the Tippler area
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Figure 22. Precast Segments at Industrial stockyard area
Figure 23. Repair and maintenance of the wagon Tippler
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Tree Cutting Permit
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Related Documentation on Hazardous Materials
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NCIP
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Tunnel Geotechnical Profile