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 2018 July to December
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.
i Angat Water Transmission Improvement Project – Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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
ii Angat Water Transmission Improvement Project – Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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
iii Angat Water Transmission Improvement Project – Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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
iv Angat Water Transmission Improvement Project – Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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
v Angat Water Transmission Improvement Project – Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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
vi Angat Water Transmission Improvement Project – Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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.
vii Angat Water Transmission Improvement Project – Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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.
2 Angat Water Transmission Improvement Project – Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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
3 Angat Water Transmission Improvement Project – Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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 Actual Actual Plan to Variance to (Previous (This (Cumulative) Date Date Month) Month) S1 Design 2.84% 0.00% 2.84% 2.84% 0.00% Services A-1 Site 1.89% 0.01% 1.90% 1.90% 0.00% Facilities A-2 Inlet Works 2.38% 0.02% 2.40% 2.34% 0.06% Including Cofferdam and Auxillary Mechanical Equipment A-4 Tunnel and 73.52% 3.22% 76.74% 75.72% 1.02% Portals A-3 Outlet 0.61% 0.00% 0.61% 0.61% 0.00% Works TOTAL 81.24% 3.25% 84.89% 83.41% 1.08%
4 Angat Water Transmission Improvement Project – Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Tunnel The total excavation by TBM is at 5,657 m as of December 31, 2018.
5, 988 Total excavation progress/ TBM location (m) 5,657 Previous TBM Excavation progress (starting 2018 Feb 13 until previous month), (m) 331 TBM Excavation progress in 2018 December, (m)
Average daily TBM excavation progress in 20.69 2018December, (m) 16 excavation days
Total number of rings installed, (no) 4, 610
Rings installation progress (starting 2018 Feb 13 until 4,356 previous month), (No)
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 108, 437 previous month), (m3)
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.
5 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Figure 2. TBM Location as of December 2018
6 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Figure 3. TBM Location and profile
7 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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.
8 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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.
9 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
• 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 Filipino Foreigner Entity TOTAL # % # % CMC permanent staff 141 58% 21 9% 162 CMC contract workers / 75 31% 0 0 75 utilities
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CMC consultants 2 1% 2 1% 4 SUB-CON Don Vic Construction 79 100% 0 0% 79 (AWTIP/IDSSP) Mapolcom 21 100% 0 0% 21
Morse Hydraulic 3 100% 0 0% 3 Trevi Foundations 48 92% 4 8% 52 Philippines(AWTIP/IDSSP) Bunzu Construction 38 100% 0 0% 38 (Manpower Supply) Fabrimetrics 11 100% 0 0% 11
Table 5. Filipino Workforce as of December 31, 2018 – by geographic location Personnel Personnel Personnel Personnel Personnel employed employed employed employed employed from Brgy from Bgry from other from other from other Entity San Mateo Bigte Bgrys in municipalitie provinces TOTAL Norzagaray s/ cities in Bulacan # % # % # % # % # % CMC permanent 25 12% 33 15% 18 7% 32 13% 54 22% 162 staff CMC contract 15 6% 10 4% 12 5% 10 4% 28 12% 75 workers / utilities CMC consultants 0 % 0 % 0 % 0 % 4 1% 4 SUB-CON Don Vic Construction 75 95% 2 3% 1 1% 1 1% 0 0% 79 (AWTIP/IDSSP) 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/ 7 13% 0 0% 0 0% 0 0% 45 87% 52 IDSSP) Fabrimetrics 1 8% 0 0% 0 0% 0 0% 10 92% 11 Bunzu Construction 4 11 1 3 1 3 17 45 15 39 38 (Manpower Supply)
11 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Table 6. Workforce as of December 31, 2018 – by Gender Male Female Entity TOTAL # % # % CMC permanent staff 139 58% 23 9% 162 CMC contract workers / 71 29% 4 2% 75 utilities CMC consultants 3 1% 1 1% 4 SUB-CON Don Vic Construction 70 89% 9 11% 79 (AWTIP/IDSSP) Mapolcom 21 100% 0 0% 21
Morse Hydraulic 3 100% 0 0% 3 Trevi Foundations 50 96% 2 4% 52 Philippines(AWTIP/IDSSP) Bunzu Construction 38 100% 0 0% 38 (Manpower Supply) Fabrimetrics 11 100% 0 0% 11
Table 7. Workforce as of December 31, 2018 – Dumagats Male Female Entity TOTAL # % # % CMC permanent staff 0 0% 0 0% 0 CMC contract workers / 3 100% 0 0% 3 utilities CMC consultants 0 0% 0 0% 0
SUB-CON Don Vic Construction 65 89% 8 11% 73 (AWTIP/IDSSP) Mapolcom 0 0% 0 0% 0
Morse Hydraulic 0 0% 0 0% 0 Trevi Foundations 7 100% 0 0% 6 Philippines(AWTIP/IDSSP) Bunzu Construction 4 100% 0 0% 4 (Manpower Supply) Fabrimetrics 0 0% 0 0% 0
12 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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 18-25 26-35 36-45 46-60 Over 60 TOTA Entity # % # % # % # % # % L CMC permanent 10 4% 60 25% 65 25% 25 10% 2 1% 162 staff CMC contract 23 10% 15 7% 17 7% 19 8% 1 1% 75 workers / utilities CMC consultants 0 0% 0 0% 1 1% 3 1% 0 0% 4 SUB-CON Don Vic Construction 14 18% 32 41% 28 35% 5 6% 0 0% 79 (AWTIP/IDSSP) 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/ 17 33% 16 31% 9 17% 10 19% 0 0% 52 IDSSP) Bunzu Construction 8 21% 10 26% 18 47% 2 5% 0 0% 38 (Manpower Supply) 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 Quantity Item
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 Quantity Item
Loader 1 Dump Truck 6 TOTAL 7
Table 12. Trevi Foundation Quantity Item
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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Quantity Item
Tower Light 1 SM 14 1 TOTAL 10
Table 13. Don Vic Construction Quantity Item
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 Permits Date of Issue/ remarks Expiry Date Laws 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 A/C No. hereby given the right-of-way to locate, (Authority to construct, and maintain such works over Construct) and throughout the lands, including any P.D. 984 (Pollution - street, avenue or highway owned by Control Law) 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. Please see row on RA 8749 (Phil Clean (Permit to Air Act) of this table Operate) - 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 ECC1 diameter from Ipo Dam, Barangay (Environmental San Mateo to Barangay Bigte, with PD 1586 Compliance associated facilities such as (Establishing EIS Certificate) Contractor’s Work areas, Spoil System) 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 Permits Date of Issue/ remarks Expiry Date Laws 4. Fencing of the Right-of- way ECC2 Not applicable. No change in project Not applicable. No change in project ECC3
DENR Registry ID GR-R3-14-01197 CCO Registry RA 6969 (Toxic (Chemical Control Not applicable. Substances and Order) Hazardous and Importer Not applicable. Nuclear Waste) Clearance No Permit to PTT-R3-14-01368 2018 Feb 06 Transport 06 August 2018 P.D 984 (water Discharge Permit No. DP-18K-03BU- Discharge Permit 2019 November 30 Pollution) 2381-R A/C No. FLA- 17J-03BU-549 (1-unit 40KW 2018 October 30 Standby GenSet) 2017 October 20
Certificate of final electrical inspection PO No.1 was given to CMC by the LGU Norzagaray for the 50KVA (control number 28787) Genset for temporary power. date issued on 10 August 2018
FLA- 17J-03BU-550 (1-unit 20KW 2018 October 30 Standby GenSet) 2017 October 20
PO No.2 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 RA 8749 (Phil Clean FLA-18J-03BU-550 (1-unit 20KW 2019 October 30 Air Act) Standby Genset) 2018 September 17
Certificate of final electrical inspection PO No. 3 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) FLA-18J-03BU-549 (1-unit 40KW 2019 October 30 Standby Genset) 2018 September 17
Certificate of final electrical inspection PO No. 4 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) FLA-18H-03BU-825 (1-unit 100KW 2019 August 30 P.O No. 5 Temporary Diesel Genset) 2019 August 02
17 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Environmental Permits Date of Issue/ remarks Expiry Date Laws 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) FLA-18G-03BU-815 (1-unit 80KW 2019 July 30 Temporary Diesel Genset)
Certificate of final electrical inspection P.O No. 6 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) Tree cutting permit dated September September 30, 2016 23, 2016 (10 assorted tree species in Bigte) issued by CENRO Tabang Tree cutting permit dated October 5, October 20, 2016 2016 (38 mixed trees in Brgy San Mateo and Bigte) issued by MENRO Norzagaray Tree cutting permit dated November 10, November 25, 2016 2016 (10 assorted fruit tree species in Bigte) issued by CENRO Tabang Tree cutting permit dated March 16, March 31, 2017 2017 (10 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang Tree cutting permit dated April 3, 2017 April 18, 2017 (10 assorterd fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang Tree cutting permit dated April 21, 2017 May 6, 2017 (10 assorted fruit tree species in the Ipo PD 705 (The Dam Access Road) issued by CENRO Forestry Reform Tree Cutting Tabang Code Of The Permit Tree cutting permit dated March 20, April 4, 2017 Philippines) 2017 (50 trees in Brgy San Mateo and Bigte) issued by MENRO Norzagaray Tree cutting permit dated January 29, February 14, 2018 2018 (20 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang Tree cutting permit dated February 1, February 16, 2018 2018 (10 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang Tree cutting permit dated February 26, March 13, 2018 2018 (15 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang Tree cutting permit dated March 13, April 13, 2018 2018 (25 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang Tree cutting permit dated November 26, Dec 3, 2018 2018 (4 fruit bearing trees/
18 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Environmental Permits Date of Issue/ remarks Expiry Date Laws 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 (2017 –LUP- Land use Permit issued by 25 years (Approx. July 03) dated 14 July 2017 was NPC 2042) issued by NPC to MWSS Garbage Hauling and May 30, 2017 expired and December 30, 2017 Disposal renewed January 1, 2018 December 30, 2018 Permit number: 2017-0722 Expired and Mayor’s Permit December 31, 2017 Date of Issue: June 5, 2017 renewed Permit number: 2018-0126 Date of Issue: January 11, December 31, 2018 2018 Permit number: 2017-11- Excavation/slope 0090 stabilization Permit November 29, 2017 BP #2017-11-0091 Storage Building Permit November 29, 2017 PCO Accreditation – 29 September 2017 29 September 2020 Hector Veloso 22 March 2018 Building Permit No 2018- 03-0001 Applied at the Municipality of Norzagaray on 22 March 2018 Demolition Permit (Permit to demolish Name of proponent pedestrian bridge of the to be amended from Old Ipo Dam watch tower) MWSS/ CMC to MWSS/ CMC/ Maynilad/ Manila Water
Target date: week 1 July 2018
19 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Permits Date of Issue/ remarks Expiry Date Remarks In progress. 2017 08 17-18 Field based investigation by NCIP
2018 0804 First Community Assembly
2018 0829 second community assembly
Free and Prior Informed 2018 0914 Consent (FPIC) 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 916 14 930 Inducted/Oriented 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 47 0 47 Equipment (PPE) 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 5 0 5 Drill Defensive Driving 26 0 26 Electrical Safety 35 0 35 Hazardous Materials Handling 8 0 8 No. of People Trained (Disaster awareness and 113 113 management) 0 No. of People Trained (Self 42 0 42 Resuscitator) Refuge Chamber 23 0 23 Self-Contained Breathing 21 0 21 Apparatus 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.
21 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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.
23 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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 Potential Impact Possible Approach/ Compliance Remarks Aspect Mitigating Measures Status Physical Soil and Erosion Protect slopes with any one Compliant Ipo Contractor’s Work Area (Land) due to: or combination of bonded Environment fiber matrices, erosion The project site in Ipo is characterized by steep slopes of · soil disturbance control blankets, silt fence, transported materials and loose soil. With this area condition, · vegetation fiber rolls, and keeping slopes along some sections of the road have been installed with clearing stormwater off the slopes threaded rock bolts/ soil nails. Slope stabilization permit for Ipo through diversion channels Construction Site has been obtained in November 2017 and and/or berms. slope stabilization works is almost complete.
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Environmental Potential Impact Possible Approach/ Compliance Remarks Aspect Mitigating Measures Status Silt curtains have already been installed in May 2018
Slope protection at Ipo Contractor’s Work Area.
25 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Environmental Potential Impact Possible Approach/ Compliance Remarks Aspect Mitigating Measures Status 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
26 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Environmental Potential Impact Possible Approach/ Compliance Remarks Aspect Mitigating Measures Status Water Impact on surface At the active work sites Compliant Portalets are provided in all construction sites. Construction of water quality due office facilities includes septic tanks at the CMC Office. to/ from: Mitigating contaminants · Provide adequate · Contaminants sanitation facilities and water from materials used supply at work sites and and construction workers’ camp. Enforce activities and observance of good processes sanitation practices by workers. · Siltation from soil erosion, spoil disposal area, dewatering excavations, etc Construction of septic tank of CMC Office
· Water quality Water purification tanks to provide drinking water are installed at Deterioration of the CMC Office in Bigte and workers' camp/ accommodation at water quality in Ipo Dam and Bigte river Villa Antonio (in San Jose del Monte, Bulacan). All other workers' Tributary during apartments are provided with AC rooms, domestic water supply, construction and drinking water, among others.
27 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Environmental Potential Impact Possible Approach/ Compliance Remarks Aspect Mitigating Measures Status
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 Potential Impact Possible Approach/ Compliance Remarks Aspect Mitigating Measures Status
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 Potential Impact Possible Approach/ Compliance Remarks Aspect Mitigating Measures Status
Portalets provided at construction sites
30 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Environmental Potential Impact Possible Approach/ Compliance Remarks Aspect Mitigating Measures Status
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 Monitor for potential Not There were no water cell/ aquifer traversed by the TBM during level of wells in groundwater depletion in Applicable tunnel excavation along the alignment which is characterized to nearby existing wells in the vicinity. have community above ground. Action is deemed not needed.
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Environmental Potential Impact Possible Approach/ Compliance Remarks Aspect Mitigating Measures Status communities due to Provide interim measures to tunneling, avoid disrupting water supply pumping/extracting to affected households. of tunnel drainage Investigate for proper water corrective action. Water Impact on surface · Mitigating sedimentation Not In the construction of the inlet structure, diaphragm wall plan will water quality due Build diaphragm wall when Applicable be built. Design drawings submitted to MWSS. (Drawing Code: to/ from: building inlet structure S-A-06-O-ST-SE-04-A; Sheet Contents: Variant Inlet Works, Intake Structures, Diaphragm wall – Plan, sections and setting out · Contaminants point) 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
32 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Table 17. Summary of Environmental Monitoring Programs Implemented EMP Requirement Compliance Location Comment on Reasons for Partial or Non- Required Action and Target Dates to (list all mitigation Attained Compliance Achieve Compliance measures specified in the EMP/CEMP/SEMP) 1. Water Quality Compliant Ipo and Bigte Parial Compliance. Activity still ongoing. Schedule of surface water quality monitoring: Monitoring River Visual monitoring through photograph and • July 10 , 2018 Video documentation. • August 23, 2018 • Sept 20, 2018 Water quality sampling is conducted monthly • November 6-8, 2018 for surface water and water treatment plant by • December 4, 2018 CRL Laboratories. Schedule of effluent monitoring: The parameters for the surface water are the following: Temperature, pH, electric • July 10 , 2018 conductivity, tubidity, color, TDS, ORP, • August 7-9, 2018 dissolved oxygen, BOD, coliform (Total and • September 11, 2018 Fecal) and heavy metals (See sampling • October 9, 2018 location and results on the report). • November 6-8, 2018 • December 4, 2018 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. 2. Air quality Compliant Ambient air quality monitoring is conducted Schedule of Air Quality Monitoring: monitoring quarterly by CRL Laboratories. • September 25-28, 2018 A sound level meter was procured by CMC to • November 19-21, 2018 monitor the noise level during construction period as one of the requirements of ADB and DENR. Noise monitoring started on 28 October 2017.
33 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
EMP Requirement Compliance Location Comment on Reasons for Partial or Non- Required Action and Target Dates to (list all mitigation Attained Compliance Achieve Compliance measures specified in the EMP/CEMP/SEMP) 3. Freshwater Compliant Freshwater ecology monitoring is done during • June 10-15, 2018 ecology monitoring wet and dry seasons. • September 20-23, 2018
5. Social and Partial Residences Bulletin boards for IEC purpose were installed IEC is a continuous activity by updating the environmental near in the barangay halls of Brgys. Bigte and San project bulletin boards installed in Brgys. Bigte awareness construction Mateo on June 19-20, 2017. and San Mateo Barangay Halls; Ipo area and tunnel Elementary School. ROW 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 6. Public Health and Compliant Health and safety staff are hired. Detailed Applicable measures implemented. safety grievance procedure was formulated in July 2017.
34 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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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AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Table 18. Water Quality of WTP effluent (July to December 2018 Parameter (Class B Reference Unit July 18, August September October November December DAO 2016- 2018 23, 2018 20, 2018 16, 2018 6, 2018 18, 2018 08, Effluent Standards) Physical Characteristics 9 Temp (°C change) 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 Ύ 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 0.02 DAO 2016-08 mg/L <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Hexavalent Dissolved Copper 0.04 DAO 2016-08 mg/L <0.003 <0.003 <0.003 <0.003 <0.003 <0.003 (Cu)
9 General Effluent Standard values for temperature is the temperature difference of the background value and discharge point.
36 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Parameter (Class B Reference Unit July 18, August September October November December DAO 2016- 2018 23, 2018 20, 2018 16, 2018 6, 2018 18, 2018 08, Effluent Standards) 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 100 DAO 2016-08 mg/L ND ND ND ND ND ND (Gasoline Range Organics, C6-C10 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
37 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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.
38 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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
41 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Water Quality Results for Bigte River (July to December 2018)
Table 19. Bigte Creek Water Quality Sampling sites
Code / Photo Sampling Date/ General remarks Location
SWB1 2018 July 11
(SW1 in EIA 2018 August 23 Nov 2016) 2018 Sept20 Bigte Creek 2018 Oct 9 near the outlet. Bigte Creek 2018 Nov 6 near the basin 2018 Dec 18 2 in Bigte Portal.
N14° 51.538’ E121° 05.453’
SWB2 2018 July 11
(SW3 in EIA 2018 August 23 Nov 2016) 2018 Sept20 Bigte Creek, 2018 Oct 9 within the Salonga 2018 Nov 6 Property. The 2018 Dec 18 site near Sitio Settling
N14° 51.526
E121° 05.330’
42 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Code / Photo Sampling Date/ General remarks Location
SWB2 A 2018 July 11
Bigte Creek, 2018 August 23 within the 2018 Sept 20 Salonga Property. The 2018 Oct 9 site near 2018 Nov 6 culvert at Sitio 2018 Dec 18 Settling
SWB3 2018 July 11
Bigte Creek. 2018 Aug 23 Sampling site is 2018 Sept 20 near the Minuyan bridge 2018 Oct 9
N14° 51.404’ 2018 Nov 6
E121° 05.193 2018 Dec 18
43 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Code / Photo Sampling Date/ General remarks Location
SWSM1 2018 July 11
(Sta.MARIA 03 2018 August 23 in EIA 2018 Sept20 November 2016) 2018 Oct 9
In Sta.Maria 2018 Nov 6 River, 2018 Dec 18 within the vicinity of San Jose Bridge
N14° 50.123’
E121° 04.47’1’
44 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Table 20. Water Quality Results for SWB1 Parameter Adopted Reference SW BIGTE1/SWB1 Criteria Bigte Creek near the basin 2 in Bigte Portal. This site is near the outlet. (Class B N14° 51.538’ DAO E121° 05.453’ 2016-08) Year/ quarter 2013 2014 DRY July 11, Aug. Sept. 20, Nov. 6, WET (Novemb 2018 23, 2018 2018 (May to er to 2018 October) April) 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 14.62 13.91 8.2 8.1 8.2 9.0 DAO 90-34 TSS 65 DAO 2016-08 130.5 130.5 - - - 314
Electric Cond. (mS/cm) - parameter not included in 228.5 217.3 223 246 270 8 b DAO 2016-08 Turbidity (NTU) b 20 EP (Water Quality) Policy 5.66 5.26 40 17 9.4 15 2003, ANZECC Colour (Apparent, 50 DAO 2016-08, class B 15 15 60 20 20 183 PCU) TDS - parameter not included 146.9 12 133 144 155 8 inDAO 2016-08 pH 6.50-8.50 DAO 2016-08 8.7 7.93 8.1 8.3 8.2
Inorganic and nonmetallic constituents
45 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Parameter Adopted Reference SW BIGTE1/SWB1 Criteria Bigte Creek near the basin 2 in Bigte Portal. This site is near the outlet. (Class B N14° 51.538’ DAO E121° 05.453’ 2016-08) 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 ReductionΎ - parameter not included in 195 217.2 520 360 269 332 Potential ORP (mV) DAO 2016-08 Phosphorus (as PO ³¯) 0.5 DAO 2016-08 0.03 0.4 0.1 0.1 0.2 0.2 organic and biologicalΏ constituents Dissolved Oxygen 5 DAO 2016-08 14.4 4.21 9 8 8 9 (minimum)
BOD5 5 DAO 2016-08 1 1 1 1 1 2
COD b - parameter not included in 20 9.8 11 5 12 14 DAO 2016-08 Faecal Coliform 100 DAO 2016-08 54,000 4600 24000 3500 790 (MPN/100mL) b 1,700 Total Coliform - parameter not included in 92,000 35000 24000 3500 (MPN/100mL) DAO 2016-08 16,000 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 <0.001 <0.001 <0.008 <0.008 <0.008 <0.008 DAO 2016-08
46 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Parameter Adopted Reference SW BIGTE1/SWB1 Criteria Bigte Creek near the basin 2 in Bigte Portal. This site is near the outlet. (Class B N14° 51.538’ DAO E121° 05.453’ 2016-08) 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, 0.01 DAO 2016-08 <0.003 <0.003 - - - - Cr(VI)) 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 <1.0 <1.0 0.01 0.01 0.01 0.01 DAO 2016-08 Zinc (Zn) 2 DAO 2016-08 <0.02 <0.02 - 0.01 0.006 0.008
47 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Table 21. Water Quality Results for SWB2 Parameter Adopted Reference SW03/SWB2 Criteria Bigte Creek, within the Salonga Property. The site near Sitio Settling (Class B N14° 51.526 E121° 05.330’ DAO 2016- 08) Year/ quarter 2013 2014 DRY July 11, Aug. Sept. 20, Nov. 6, WET (Novemb 2018 23, 2018 2018 (May to er to 2018 October) April) Physical Characteristics Temp (°C) 26-30 DAO 2016-08 27 27.10 32.2 27.1 26.5 -
Salinity (%) b - parameter not included 14.06 12.16 9.0 8.1 4.9 - in DAO 90-34 TSS 65 DAO 2016-08 - 12 - - - -
Electric Cond. (mS/cm) - parameter not included 219.7 190.0 222 233 220 - b in DAO 2016-08 Turbidity (NTU) b 20 EP (Water Quality) 12.8 24.10 45 17 20 - Policy 2003, ANZECC Colour (Apparent, 50 DAO 2016-08, class B 20 10 60 20 15 - PCU) TDS - parameter not included 141.1 120.40 133 138 122 - inDAO 2016-08 pH 6.50-8.50 DAO 2016-08 8.33 8.12 7.7 8.3 8 -
Inorganic and nonmetallic constituents
48 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Parameter Adopted Reference SW03/SWB2 Criteria Bigte Creek, within the Salonga Property. The site near Sitio Settling (Class B N14° 51.526 E121° 05.330’ DAO 2016- 08) 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 ReductionΎ - parameter not included 82.00 82 525 378 287 - Potential ORP (mV) in DAO 2016-08 Phosphorus (as PO ³¯) 0.5 DAO 2016-08 0.01 0.01 0.1 0.1 0.1 - organic and biologicalΏ 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 9.8 9.8 9.5 16 11 - in DAO 2016-08 Faecal Coliform 100 DAO 2016-08 9,200 - (MPN/100mL) b 1,700 4,600 24,000 2,400
Total Coliform - parameter not included 92,000 - (MPN/100mL) in DAO 2016-08 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
49 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Parameter Adopted Reference SW03/SWB2 Criteria Bigte Creek, within the Salonga Property. The site near Sitio Settling (Class B N14° 51.526 E121° 05.330’ DAO 2016- 08) Antimony (Sb) - parameter not included <0.001 <0.001 0.008 0.008 0.008 - in DAO 2016-08 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, 0.01 DAO 2016-08 <0.003 <0.003 - - - - Cr(VI)) 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 <1.0 <1.0 0.01 0.01 0.01 - in DAO 2016-08 Zinc (Zn) 2 DAO 2016-08 <0.02 <0.02 0.01 0.01 -
50 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Table 22. Water Quality Results for SWB2A Parameter Adopted Reference SWB2A Criteria Water Quality of Bigte Creek in the section drains out from construction (Class B site DAO 2016-08) Year/ quarter 2013 2014 DRY July 11, Aug. Sept. 20, Nov. 6, WET (Novemb 2018 23, 2018 2018 (May to er to 2018 October) April) 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 - 12.16 5.8 5.7 8.2 4.9 DAO 90-34 TSS 65 DAO 2016-08 - 12 - - - -
Electric Cond. (mS/cm) - parameter not included in - 190.0 205 216 270 180 b DAO 2016-08 Turbidity (NTU) b 20 EP (Water Quality) Policy - 24.10 23 30 9.4 16 2003, ANZECC Colour (Apparent, 50 DAO 2016-08, class B - 10 25 20 20 10 PCU) TDS - parameter not included - 120.40 120 124 155 104 inDAO 2016-08 pH 6.50-8.50 DAO 2016-08 - 8.12 7.8 8 8.2 8
Inorganic and nonmetallic constituents
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Parameter Adopted Reference SWB2A Criteria Water Quality of Bigte Creek in the section drains out from construction (Class B site DAO 2016-08) 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 ReductionΎ - parameter not included in - 82 547 496 269 344 Potential ORP (mV) DAO 2016-08 Phosphorus (as PO ³¯) 0.5 DAO 2016-08 - 0.01 0.08 0.1 0.2 0.05 organic and biologicalΏ constituents Dissolved Oxygen 5 DAO 2016-08 - 8.18 8 8 8 9 (minimum)
BOD5 5 DAO 2016-08 - 1 1 1 1 2
COD b - parameter not included in - 9.8 16 9.8 12 15 DAO 2016-08 Faecal Coliform 100 DAO 2016-08 - 1,700 2400 4300 3500 5400 (MPN/100mL) b Total Coliform - parameter not included in - 16,000 5400 24000 3500 16000 (MPN/100mL) DAO 2016-08 Oil and Grease 1 DAO 2016-08 - 0.4 0.9 0.6 0.56 0.9
Elements
Antimony (Sb) - parameter not included in - <0.001 <0.008 <0.008 <0.008 <0.008 DAO 2016-08
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Parameter Adopted Reference SWB2A Criteria Water Quality of Bigte Creek in the section drains out from construction (Class B site DAO 2016-08) 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, 0.01 DAO 2016-08 - <0.003 - - - - Cr(VI)) 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 - <1.0 0.1 0.01 0.01 0.008 DAO 2016-08 Zinc (Zn) 2 DAO 2016-08 - <0.02 0.4 0.02 0.006 0.01
53 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Table 23. Water Quality Results for SWB3 Parameter Adopted Reference SWB3 Criteria Baltazar bridge. This is the bridge pass the Barangay Bigte Hall (Class B N14° 51.272’ E121° 05.144’ DAO 2016-08) Year/ quarter 2013 July 11, Aug. Sept. 20, Nov. 6, WET 2014 DRY 2018 23, 2018 2018 (May to (Novembe 2018 October) r to April) Physical Characteristics Temp (°C) 26-30 DAO 2016-08 28.4 - 26.5 25.4 28.20 - Salinity (%) b - parameter not included in 11 - 9 9 DAO 90-34 - - TSS 65 DAO 2016-08 ------Electric Cond. (mS/cm) - parameter not included in 419 - 420 225 b DAO 2016-08 376.00 - Turbidity (NTU) b 20 EP (Water Quality) Policy 55 - 11 50 2003, ANZECC 25.40 - Colour (Apparent, 50 DAO 2016-08, class B 25 - 15 10 PCU) - TDS - parameter not included 254 - 263 130 inDAO 2016-08 244.80 - pH 6.50-8.50 DAO 2016-08 7.8 - 8 8 7.94 - Inorganic and nonmetallic constituents
54 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Parameter Adopted Reference SWB3 Criteria Baltazar bridge. This is the bridge pass the Barangay Bigte Hall (Class B N14° 51.272’ E121° 05.144’ DAO 2016-08) Total Nitrogen DAO 2016-08 12 - 8.5 7.1
Nitrogen (as NO ¯) a 7 DAO 2016-08 1.2 - 0.5 0.5 - - Ύ Oxidation Reduction - parameter not included in - 281 404 366 Potential ORP (mV) DAO 2016-08 251.00 - Phosphorus (as PO ³¯) 0.5 DAO 2016-08 - 0.1 0.1 0.1 - - organic and biologicalΏ constituents Dissolved Oxygen 5 DAO 2016-08 8 - 8 8 (minimum) - - BOD5 5 DAO 2016-08 1 - 1 1 - - COD b - parameter not included in 7.5 - 13 15 DAO 2016-08 - - Faecal Coliform 100 DAO 2016-08 16000 - 11000 1,700 b (MPN/100mL) - - Total Coliform - parameter not included in 24000 - 11000 9,200 (MPN/100mL) DAO 2016-08 - - Oil and Grease 1 DAO 2016-08 0.8 - 0.67 1.1 - - Elements -
Antimony (Sb) - parameter not included in <0.008 - <0.008 <0.008 DAO 2016-08 - -
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Parameter Adopted Reference SWB3 Criteria Baltazar bridge. This is the bridge pass the Barangay Bigte Hall (Class B N14° 51.272’ E121° 05.144’ DAO 2016-08) 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, 0.01 DAO 2016-08 - - - - Cr(VI)) - - 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 0.01 - 0.01 0.01 DAO 2016-08 - - Zinc (Zn) 2 DAO 2016-08 0.04 - 0.008 0.01 - -
56 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Table 24. Water Quality Results for SW3A Parameter Adopted Reference SWB3A Criteria Water Quality near Minuyan Bridge (Class B DAO 2016-08) Year/ quarter 2013 2014 DRY July 11, Aug. Sept. 20, Nov. 6, WET (Novemb 2018 23, 2018 2018 (May to er to 2018 October) April) 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 - - 5.8 5.7 6.5 8.1 DAO 90-34 TSS 65 DAO 2016-08 - - - - -
Electric Cond. (mS/cm) - parameter not included in 376.00 - 205 216 256 622 b DAO 2016-08 Turbidity (NTU) b 20 EP (Water Quality) Policy 25.40 - 23 30 13 2.4 2003, ANZECC Colour (Apparent, 50 DAO 2016-08, class B - 25 20 15 8 PCU) TDS - parameter not included 244.80 - 120 124 149 376 inDAO 2016-08 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
57 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Parameter Adopted Reference SWB3A Criteria Water Quality near Minuyan Bridge (Class B DAO 2016-08) Nitrogen (as NO ¯) a 7 DAO 2016-08 - - 0.5 <0.02 0.8 0.5
Oxidation ReductionΎ - parameter not included in 251.00 - 547 496 296 352 Potential ORP (mV) DAO 2016-08 Phosphorus (as PO ³¯) 0.5 DAO 2016-08 - - 0.08 0.1 0.1 0.09 organic and biologicalΏ - - constituents Dissolved Oxygen 5 DAO 2016-08 - - 8 8 7 7 (minimum ) BOD5 5 DAO 2016-08 - - 1 1 1 1
COD b - parameter not included in - - 16 9.8 6.9 17 DAO 2016-08 Faecal Coliform 100 DAO 2016-08 - - 2400 4300 5400 240,000 (MPN/100mL) b Total Coliform - parameter not included in - - 5400 24000 5400 240,000 (MPN/100mL) DAO 2016-08 Oil and Grease 1 DAO 2016-08 - - 0.9 0.6 0.44 0.5
Elements Antimony (Sb) - parameter not included in - - <0.008 <0.008 <0.008 0.008 DAO 2016-08 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
58 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Parameter Adopted Reference SWB3A Criteria Water Quality near Minuyan Bridge (Class B DAO 2016-08) Chromium (hexavalent, 0.01 DAO 2016-08 ------Cr(VI)) 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 - 0.1 0.01 0.01 0.006 DAO 2016-08 Zinc (Zn) 2 DAO 2016-08 - - 0.4 0.02 <0.005 <0.005
59 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Table 25. Water Quality Results for SWSM1 Parameter Adopted Reference Sta.MARIA 03/SWSM1 Criteria In Sta.Maria River, (Class B within the vicinity of San Jose Bridge DAO N14° 50.123’ E121° 04.47’1’ 2016-08) Year/ quarter 2013 2014 DRY July 11, Aug. Sept. 20, Nov. 6, WET (Novemb 2018 23, 2018 2018 (May to er to 2018 October) April) 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 15.74 12 6.5 13 15 DAO 90-34 TSS 65 DAO 2016-08 657.00 32.00 - - - -
Electric Cond. (mS/cm) - parameter not included in 246.00 450.80 300 247 310 390 b DAO 2016-08 Turbidity (NTU) b 20 EP (Water Quality) Policy 51.40 12.10 65 35 26 3.7 2003, ANZECC Colour (Apparent, 50 DAO 2016-08, class B 500.00 25 25 15 15 PCU) TDS - parameter not included 158.00 292.50 179 142 188 234 inDAO 2016-08 pH 6.50-8.50 DAO 2016-08 8.20 7.5 7.7 7.7 7.8 7.64 Inorganic and nonmetallic constituents Total Nitrogen DAO 2016-08 0.10 8.9 8.3 11 5.2 0.60
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Nitrogen (as NO ¯) a 7 DAO 2016-08 0.9 0.2 0.6 1.1
Oxidation ReductionΎ - parameter not included in 187.00 547 493 286 313 Potential ORP (mV) DAO 2016-08 156.00 Phosphorus (as PO ³¯) 0.5 DAO 2016-08 0.70 0.2 0.1 0.2 0.3 0.30 organic and biologicalΏ constituents Dissolved Oxygen 5 DAO 2016-08 not 7 8 7 8 (minimum) measured 2.07 BOD5 5 DAO 2016-08 3 4 4 2 14.00 1.00 COD b - parameter not included in 15 9.3 21 18 DAO 2016-08 49.00 49.00 Faecal Coliform 100 DAO 2016-08 16,000 54,000 (MPN/100mL) b 920,000.0 31,000.00 35,000 54,000 0 Total Coliform - parameter not included in 16,000 54,000 (MPN/100mL) DAO 2016-08 920,000.0 31,000.00 54,000 54,000 0 Oil and Grease 1 DAO 2016-08 <0.3 0.7 1.1 0.44 0.4 0.70 Elements
Antimony (Sb) - parameter not included in <0.001 <0.001 <0.008 <0.008 <0.008 <0.008 DAO 2016-08 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, 0.01 DAO 2016-08 <0.003 <0.003 - - - - Cr(VI)) Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 <0.01 <0.02 <0.02 <0.003
61 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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 <1.0 <1.0 0.01 0.01 0.01 0.01 DAO 2016-08 Zinc (Zn) 2 DAO 2016-08 0.10 <0.02 - 0.02 0.007 0.05
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Table 26. Water Quality Results for SW2B Parameter Adopted Unit Reference Wet Aug 23, 2018 Criteria (May to October 2013) Physical Characteristics Temp 26-30 °C DAO 2016-08, 32.3 27.3 class B; Salinity - % parameter not 8.1 included in DAO 2016-08 TSS 65 mg/L DAO 2016-08, 32 - class B Electric - µS/cm parameter not 450.8 384 Conductivity included in DAO (EC) 2016-08; Turbidity 20 NTU EP (Water Quality) 12.1 17 Policy 2003, ANZECC Colour 50 TCU parameter not 15 included in DAO 2016-08 TDS - mg/L parameter not 292.5 225 included in DAO 2016-08 pH 6.50-8.50 DAO 2016-08, 7.64 7.8 class B Inorganic and nonmetallic constituents Total Nitrogen - mg/L parameter not - 5.3 included in DAO 2016-08 Nitrogen (as 7 mg/L DAO 2016-08, 0.6 0.08 NO ¯) a class B Oxidation- - mV parameter not 156 524 ReductionΎ included in DAO Potential (ORP) 2016-08 Phosphorus (as 0.5 mg/L DAO 2016-08, 0.3 0.1 PO ³¯) class B organic and biologicalΏ constituents Dissolved 5 mg/L DAO 2016-08, 2.07 7 Oxygen class B BOD5 5 mg/L DAO 2016-08, 1 1 class B COD b - mg/L parameter not 49 5.8 included in DAO 2016-08 Faecal Coliform 100 MPN/1 DAO 2016-08, 31000 00mL class B 16,000
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Parameter Adopted Unit Reference Wet Aug 23, 2018 Criteria (May to October 2013) Total Coliform - MPN/1 parameter not 31000 00mL included in DAO 16,000 2016-08 Oil and Grease 1 mg/L DAO 2016-08, 0.7 3 class B Elements Antimony (Sb) - mg/L parameter not <0.001 <0.0008 included in DAO 2016-08 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 0.01 mg/L DAO 2016-08 <0.003 - (hexavalent, Cr(VI)) 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 0.2 mg/L DAO 2016-08 0.5 - (Mn) 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.
64 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Table 27. Water Quality Sampling sites along Angat/ Ipo River Code/ Photos Remarks General Location
SW IPO 1 Water quality sampling was done (IPO US2 in on 6 Nov 2018 EIA Nov 2016) Sapang Anginan and Angat River confluence N 14 53 26.09 E 121 9 59.59
SW IPO 2 Water quality sampling was done (IPO 4 in EIA on 6 Nov 2018 Nov 2016) Near confluence of Sapang Munti and Angat River
N14° 52’ 22.3” E121° 10’ 05.6”
65 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
SW IPO3 Water quality (IPO2 in EIA sampling was done Nov 2016) on 6 Nov 2018 Between the old Ipo Dam structure and intakes of existing tunnels 1,2,3 N14° 52’ 26.9” E121° 10’ 56.5
66 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
SW IPO4 Water quality sampling was done (IPO DS2 in on 6 Nov 2018 EIA Nov 2016) ~ 350m downstream of Ipo Dam N14° 52’ 36.8” E121° 10’ 42.3”
67 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
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 Reference Criteria IPO SW1/ (Class B IPO US2 in EIA 2016 DAO confluence of Sapang Anginan and Angat River 2016-08) Year/ quarter 2013 2014 DRY July 11, Aug. Sept. 20, Nov. 6, WET (Novemb 2018 23, 2018 2018 (May to er to 2018 October) April) Physical Characteristics Temp (°C) 26-30 DAO 2016-08 28.6 30.2 - - 23.2 22.4
Salinity (%) - parameter not included in 9.97 9.96 - - 4.9 3.3 DAO 90-34 TSS 65 DAO 2016-08 4 7.0 - - - -
Electric Cond. (mS/cm) - parameter not included in 155.8 155.6 - - 142 143 DAO 2016-08 Turbidity (NTU) 20 EP (Water Quality) Policy 4.61 4.9 - - 23 3.7 2003, ANZECC Colour (Apparent, 50 DAO 2016-08, class B 10 5 - - 10 8 PCU) TDS - parameter not included 100.30 92.71 - - 81 83 inDAO 2016-08 pH 6.50-8.50 DAO 2016-08 8.93 7.92 - - 7.9 7.5
68 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Parameter Adopted Reference Criteria IPO SW1/ (Class B IPO US2 in EIA 2016 DAO confluence of Sapang Anginan and Angat River 2016-08) 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 ReductionΎ - parameter not included in <0.02 219 - - 320 0.3 Potential ORP (mV) DAO 2016-08 Phosphorus (as PO ³¯) 0.5 DAO 2016-08 <0.006 <0.006 - - 0.04 0.01 organic and biologicalΏ constituents Dissolved Oxygen 5 DAO 2016-08 8.89 8.90 - - 9 9 (minimum)
BOD5 5 DAO 2016-08 1 1 - - <1 1
COD - parameter not included in 15 9.9 - - 6.4 17 DAO 2016-08 Faecal Coliform 100 DAO 2016-08 13 - - 94 45 (MPN/100mL) 17 Total Coliform - parameter not included in 49 - - 920 1300 (MPN/100mL) DAO 2016-08 110 Oil and Grease 1 DAO 2016-08 15 0.04 - 0.55 0.5
69 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Parameter Adopted Reference Criteria IPO SW1/ (Class B IPO US2 in EIA 2016 DAO confluence of Sapang Anginan and Angat River 2016-08) Elements -
Antimony (Sb) - parameter not included in <0.001 <0.001 - - <0.008 <0.008 DAO 2016-08 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, 0.01 DAO 2016-08 - <0.003 - - - Cr(VI)) 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 <1.0 <0.03 - - 0.008 0.006 DAO 2016-08 Zinc (Zn) 2 DAO 2016-08 <0.02 <1.0 - - 0.009 0.006
70 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Table 29. Water Quality Results for SW IPO2 Parameter Adopted Reference Criteria IPO 2/ (Class B IPO 4 in EIA Nov 2016) DAO 2016- Near confluence of Sapang Munti and Angat River 08) N14° 52’ 22.3” E121° 10’ 05.6 Year/ quarter 2013 2014 DRY July 11, Aug. Sept. 20, Nov. 6, WET (Novemb 2018 23, 2018 2018 (May to er to 2018 October) April) 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 9.96 9.97 4.1 3.2 6.5 3.3 in DAO 90-34
TSS 65 DAO 2016-08 4 - - - -
Electric Cond. (mS/cm) - parameter not included 7.0 155.8 153 145 162 170 in DAO 2016-08 Turbidity (NTU) 20 EP (Water Quality) 155.6 4.61 2.9 37 30 3.4 Policy 2003, ANZECC Colour (Apparent, 50 DAO 2016-08, class B 4.9 10 8 20 10 8 PCU) TDS - parameter not included 5 100.30 90 82 91 99 inDAO 2016-08 pH 6.50-8.50 DAO 2016-08 92.71 8.93 7.4 7.8 7.6 7.4
Inorganic and 7.92 nonmetallic constituents
71 AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December
Parameter Adopted Reference Criteria IPO 2/ (Class B IPO 4 in EIA Nov 2016) DAO 2016- Near confluence of Sapang Munti and Angat River 08) 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 ReductionΎ - parameter not included 95.26 370 371 306 316 Potential ORP (mV) in DAO 2016-08
Phosphorus (as PO ³¯) 0.5 DAO 2016-08 <0.02 0.2 0.04 0.04 <0.01 organic and biologicalΏ constituents Dissolved Oxygen 5 DAO 2016-08 8.89 9 8 (minimum)
BOD5 5 DAO 2016-08 8.90 1 2 1 1 1
COD - parameter not included 1 15 12 5.4 8.4 12 in DAO 2016-08 Faecal Coliform 100 DAO 2016-08 9.9 13 78 3500 3500 170 (MPN/100mL) Total Coliform - parameter not included 49 230 9200 3500 2400 (MPN/100mL) in DAO 2016-08 17 Oil and Grease 1 DAO 2016-08 15 0.9 0.6 <0.471 0.7 110
Elements
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Parameter Adopted Reference Criteria IPO 2/ (Class B IPO 4 in EIA Nov 2016) DAO 2016- Near confluence of Sapang Munti and Angat River 08) N14° 52’ 22.3” E121° 10’ 05.6 Antimony (Sb) - parameter not included 0.04 <0.001 <0.008 <0.008 <0.008 <0.008 in DAO 2016-08 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, 0.01 DAO 2016-08 <0.006 <0.003 - - - Cr(VI)) 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 <0.03 <1.0 <0.005 0.01 0.008 0.007 in DAO 2016-08 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 Reference SW IPO 3 Criteria (IPO2 in EIA Nov 2016) (Class B Between the old Ipo Dam structure and intakes of existing tunnels 1,2,3 DAO N14° 52’ 26.9” 2016 -08) E121° 10’ 56.5 Year/ quarter 2013 2014 DRY July 11, Aug. Sept. 20, Nov. 6, WET (Novemb 2018 23, 2018 2018 (May to er to 2018 October) April) 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 10.00 10.00 3.3 3.2 4.1 3.3 DAO 90-34
TSS 65 DAO 2016-08 11 11 8 - - -
Electric Cond. (mS/cm) - parameter not included in 156.3 156.3 153 147 165 143 DAO 2016-08
Turbidity (NTU) 20 EP (Water Quality) Policy 4.68 4.68 3 32 12 4.2 2003, ANZECC
Colour (Apparent, 50 DAO 2016-08, class B 10.00 10.00 8 10 8 8 PCU)
TDS - parameter not included 97.3 97.3 88 83 97 81 inDAO 2016-08
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 Reference SW IPO 3 Criteria (IPO2 in EIA Nov 2016) (Class B Between the old Ipo Dam structure and intakes of existing tunnels 1,2,3 DAO N14° 52’ 26.9” 2016-08) 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 Ύ Oxidation Reduction - parameter not included in 166 166 389 359 269 312 Potential ORP (mV) DAO 2016-08
Phosphorus (as PO ³¯) 0.5 DAO 2016-08 <0.02 <0.02 0.02 0.04 0.03 0.02 Ώ organic and biological constituents
Dissolved Oxygen 5 DAO 2016-08 8.84 8.84 8 7 8 9 (minimum)
BOD5 5 DAO 2016-08 1 1 1 <1 1 2
COD b - parameter not included in 15 15 7.6 3.9 6.4 12 DAO 2016-08 Faecal Coliform 100 DAO 2016-08 140 79 1700 2400 490 (MPN/100mL) 140
Total Coliform - parameter not included in 1,400 240 3500 2400 2400 (MPN/100mL) DAO 2016-08 1,400
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Parameter Adopted Reference SW IPO 3 Criteria (IPO2 in EIA Nov 2016) (Class B Between the old Ipo Dam structure and intakes of existing tunnels 1,2,3 DAO N14° 52’ 26.9” 2016-08) 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 <0.001 <0.001 <0.008 <0.008 <0.008 <0.008 DAO 2016-08
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, 0.01 DAO 2016-08 <0.003 - - - - Cr(VI))
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 Reference SW IPO 3 Criteria (IPO2 in EIA Nov 2016) (Class B Between the old Ipo Dam structure and intakes of existing tunnels 1,2,3 DAO N14° 52’ 26.9” 2016-08) E121° 10’ 56.5 Vanadium (V) - parameter not included in <1.0 <1.0 <0.005 0.008 0.008 0.005 DAO 2016-08
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 Reference SW IPO4 Criteria ~ 350m downstream of Ipo Dam (Class B N14° 52’ 36.8” DAO E121° 10’ 42.3” 2016 -08) Year/ quarter 2013 2014 DRY July 11, Aug. Sept. 20, Nov. 6, WET (Novemb 2018 23, 2018 2018 (May to er to 2018 October) April) 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 9.83 9.83 4.1 3.2 4.9 5.7 DAO 90-34 TSS 65 DAO 2016-08 5 5 - - - -
Electric Cond. (mS/cm) - parameter not included in 153.6 153.6 146 147 159 143 DAO 2016-08 Turbidity (NTU) 20 EP (Water Quality) Policy 4.02 4.02 19 34 13 5.6 2003, ANZECC
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Parameter Adopted Reference SW IPO4 Criteria ~ 350m downstream of Ipo Dam (Class B N14° 52’ 36.8” DAO E121° 10’ 42.3” 2016-08) Colour (Apparent, 50 DAO 2016-08, class B 5 5 10 20 8 8 PCU) TDS - parameter not included 97 97 8.6 84 93 81 inDAO 2016-08 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 ReductionΎ - parameter not included in 195 195 528 231 269 283 Potential ORP (mV) DAO 2016-08 Phosphorus (as PO ³¯) 0.5 DAO 2016-08 <0.006 <0.006 0.03 0.5 0.03 0.01 organic and biologicalΏ constituents Dissolved Oxygen 5 DAO 2016-08 6.25 6.25 9 9 10 (minimum ) BOD5 5 DAO 2016-08 1 1 2 <1 1
COD - parameter not included in 9.8 9.8 14 17 13 DAO 2016-08
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Parameter Adopted Reference SW IPO4 Criteria ~ 350m downstream of Ipo Dam (Class B N14° 52’ 36.8” DAO E121° 10’ 42.3” 2016-08) Faecal Coliform 100 DAO 2016-08 70 70 49 280 330 (MPN/100mL) Total Coliform - parameter not included in 540 540 130 3500 2400 (MPN/100mL) DAO 2016-08 Oil and Grease 1 DAO 2016-08 0.5 0.5 0.4 0.8 0.8
Elements
Antimony (Sb) - parameter not included in <0.001 <0.001 8 9 8 <0.008 DAO 2016-08 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, 0.01 DAO 2016-08 <0.003 <0.003 5400 2400 2400 Cr(VI)) 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 Reference SW IPO4 Criteria ~ 350m downstream of Ipo Dam (Class B N14° 52’ 36.8” DAO E121° 10’ 42.3” 2016-08) Vanadium (V) - parameter not included in <1.0 <1.0 <0.003 <0.003 <0.003 0.006 DAO 2016-08 Zinc (Zn) 2 DAO 2016-08 <0.02 <0.02 - - - 0.007
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Table 32. Water Quality in IPO5 Parameter Adopted Unit Reference Sept 20, 2018 Criteria Physical Characteristics Temp 26-30 °C DAO 2016-08, class 26 B; Salinity - % parameter not 4.9 included in DAO 2016-08 TSS 65 mg/L DAO 2016-08, class - B Electric - µS/cm parameter not 163 Conductivity (EC) included in DAO 2016-08; Turbidity 20 NTU EP (Water Quality) 21 Policy 2003, ANZECC Colour 50 TCU parameter not 10 included in DAO 2016-08 TDS - mg/L parameter not 97 included inDAO 2016-08 pH 6.50-8.50 DAO 2016-08, class 7.6 B Inorganic and nonmetallic constituents Total Nitrogen - mg/L parameter not 12 included in DAO 2016-08 Nitrogen (as NO ¯) 7 mg/L DAO 2016-08, class 1.2 B Oxidation- Ύ - mV parameter not 311 Reduction included in DAO Potential (ORP) 2016-08 Phosphorus (as 0.5 mg/L DAO 2016-08, class 0.03 PO ³¯) B organic and biologicalΏ constituents Dissolved Oxygen 5 mg/L DAO 2016-08, class 9 B BOD5 5 mg/L DAO 2016-08, class 1 B COD - mg/L parameter not 8.4 included in DAO 2016-08 Faecal Coliform 100 MPN/100 DAO 2016-08, class 35000 mL B Total Coliform - - parameter not 35000 included in DAO 2016-08
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Parameter Adopted Unit Reference Sept 20, 2018 Criteria Oil and Grease 1 mg/L DAO 2016-08, class 0.56 B Elements Antimony (Sb) - mg/L parameter not <0.008 included in DAO 2016-08 Arsenic (As) 0.01 mg/L DAO 2016-08 <0.01 Cadmium (Cd) 0.003 mg/L DAO 2016-08 <0.003 Chromium 0.01 mg/L DAO 2016-08 - (hexavalent, Cr(VI)) 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 Unit Reference IDSSP-IPO IDSSP-IPO Criteria INSIDE OUTSIDE CURTAIN CURTAIN Physical Characteristics Temp 26-30 °C DAO 2016- 27.2 26.3 08, class B; Salinity - % parameter not 4.1 3.2 included in DAO 2016-08 TSS 65 mg/L DAO 2016- - - 08, class B Electric - µS/cm parameter not 168 146 Conductivity included in (EC) DAO 2016- 08; Turbidity 20 NTU EP (Water 27 36 Quality) Policy 2003, ANZECC Colour 50 TCU parameter not 15 8 included in DAO 2016-08 TDS - mg/L parameter not 96 85 included in DAO 2016-08 pH 6.50-8.50 DAO 2016- 10.0 7.8 08, class B Inorganic and nonmetallic constituents
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Parameter Adopted Unit Reference IDSSP-IPO IDSSP-IPO Criteria INSIDE OUTSIDE CURTAIN CURTAIN Oxidation- - mV parameter not 587 571 Reduction included in Potential DAO 2016-08 (ORP) Total Nitrogen - mg/L parameter not 2.7 0.03 included in DAO 2016-08 Nitrogen (as 7 mg/L DAO 2016- 0.1 0.1 NO ¯) a 08, class B Phosphorus 0.5 mg/L DAO 2016- 0.01 0.03 (as ΎPO ³¯) 08, class B organic and biologicalΏ constituents Dissolved 5 mg/L DAO 2016- 8 8 Oxygen 08, class B
BOD5 5 mg/L DAO 2016- 1 1 08, class B COD - mg/L parameter not 2.9 <1.82 included in DAO 2016-08 Faecal 100 MPN/100mL DAO 2016- 54,000 1700 Coliform 08, class B
Total Coliform - - parameter not 160,000 3500 included in DAO 2016-08 Oil and Grease 1 mg/L DAO 2016- 2.6 1.0 08, class B Elements
Antimony (Sb) - mg/L parameter not <0.008 <0.008 included in DAO 2016-08 Arsenic (As) 0.01 mg/L DAO 2016- <0.01 <0.01 08, class B Cadmium (Cd) 0.003 mg/L DAO 2016- <0.003 <0.003 08, class B Chromium 0.01 mg/L DAO 2016- - - (hexavalent, 08, class B Cr(VI)) Copper (Cu) 0.02 mg/L DAO 2016- <0.02 <0.02 08, class B
Lead (Pb) 0.01 mg/L DAO 2016- <0.005 <0.005 08, class B Manganese 0.2 mg/L DAO 2016- - - (Mn) 08, class B
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Parameter Adopted Unit Reference IDSSP-IPO IDSSP-IPO Criteria INSIDE OUTSIDE CURTAIN CURTAIN Mercury (Hg) 0.001 mg/L DAO 2016- <0.0002 <0.0002 08, class B Nickel (Ni) 0.04 mg/L DAO 2016- <0.03 <0.03 08, class B Vanadium (V) 0.075 mg/L WHO 0.008 0.007 Zinc (Zn) 2 mg/L DAO 2016- 0.008 0.01 08, class B
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 Photos Location 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 AT4 AT4- A1 AT4- A2 AT4- A1 AT4- A2 AT4 A3 A3 Near San Near San Ipo MWSS Mateo MWSS Mateo Ipo Dam Dam DENR Bigte Barangay Bigte Barangay site Test Reporting site Parameter Sampling method standards Units property Hall property Hall method limits (NAAQGV) WET WET WET WET WET WET (30-31 (31 Jul-1 (1-2 25-28 25-28 25-28 Jul Aug Aug Sept Sept Sept 2013) 2013) 2013) 2018) 2018) 2018)
Wet Season Baseline Filtration method by high- Flame TSP 230 0.1 µg/Ncm 119.87 33.9 35.4 439 134.5 50.2 volume sampler AAS Absorption in liquids for Flame SO2 gaseous pollutants - 180 0.4 µg/Ncm 15.26 15.26 13.9 2.0 ND ND AAS Kimoto Brand (sampler) Absorption in liquids for Flame NO2 gaseous pollutants - 150 0.4 µg/Ncm 3.57 3.42 6.56 7.0 6.3 4.7 AAS Kimoto Brand (sampler) Filtration method by high- Flame PM10 150 20 µg/Ncm 71.09 30 33.19 160.9 62.0 27.8 volume sampler AAS
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Table 35. Ambient Air quality, November 2018 AT4 AT4- A1 AT4- A2 AT4- A1 AT4- A2 AT4 A3 A3 Near San Near San Ipo Ipo MWSS Mateo MWSS Mateo Dam Dam DENR Bigte Barangay Bigte Barangay Test Reporting site site Parameter Sampling method standards Units property Hall property Hall method limits (NAAQGV) DRY DRY DRY DRY DRY DRY (2-3 (3-4 (19-21 (19-21 (19-21 (4-5 June June June Nov Nov Nov 2014) 2014) 2014) 2018) 2018) 2018)
Dry season Baseline Filtration method by high- Flame TSP 230 0.1 µg/Ncm 56.91 48.17 17.65 82.8 87.2 22.7 volume sampler AAS Absorption in liquids for Flame SO2 gaseous pollutants - 180 0.4 µg/Ncm 2.88 3.06 2.16 1.7 ND ND AAS Kimoto Brand (sampler) Absorption in liquids for Flame NO2 gaseous pollutants - 150 0.4 µg/Ncm 4.14 4.56 3.06 7.4 7.4 1.2 AAS Kimoto Brand (sampler) Filtration method by high- Flame PM10 150 20 µg/Ncm 117.44 107.68 45.26 50.5 56.0 14.1 volume sampler AAS
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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 Morning Daytime Evening Night Time Area 5:00am to 9:00am- 6:00pm- 10:00pm – 9:00am 6:00pm 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 Receptor: Residential; institutional; educational Noise, WHO, 1999 Daytime (07:00-22:00): 55dBA International 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 Average DENR Standard for Light Remarks Time dB(A) Industrial Area (September Maximum Allowable Noise 26-27, 2018) Level, dB(A)*** 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 DENR Standard Baseline Average Remarks (Sept 25-26, for Residential Wet dB(A) 2018) Area Season Maximum (31 Jul – Allowable Noise 1 Aug Level, dB(A)*** 2013) 1100H - 1300H 55 62.2 68.2 Exceeded the Maximum Allowable Noise Level 1300H - 1500H 55 67.4 Exceeded the 66.8 Maximum Allowable Noise Level 1500H - 1700H 55 67.2 Exceeded the 60.9 Maximum Allowable Noise Level 1700H - 1900H 55 67.6 Exceeded the 64.2 Maximum Allowable Noise Level 1900H - 2100H 50 65.8 Exceeded the 59.4 Maximum Allowable Noise Level
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Sampling Time DENR Standard Baseline Average Remarks (Sept 25-26, for Residential Wet dB(A) 2018) Area Season Maximum (31 Jul – Allowable Noise 1 Aug Level, dB(A)*** 2013) 2100H - 2300H 50 62.4 Exceeded the 61.4 Maximum Allowable Noise Level 2300H - 0100H 45 62.1 Exceeded the 54.2 Maximum Allowable Noise Level 0100H - 0300H 45 57.9 Exceeded the 47.5 Maximum Allowable Noise Level 0300H - 0500H 45 51.0 Exceeded the 43.9 Maximum Allowable Noise Level 0500H - 0700H 45 53.2 Exceeded the 51.6 Maximum Allowable Noise Level 0700H - 0900H 50 65.8 Exceeded the 64.0 Maximum Allowable Noise Level 0900H - 1100H 50 65.2 Exceeded the 63.6 Maximum Allowable Noise Level
Table 38. Noise level in MWSS Bigte Compound, 2018 September Sampling Time DENR Standard for Light Average Remarks (Sept 27-28, Industrial Area dB(A) 2018) Maximum Allowable Noise Level, dB(A)*** 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 DENR Standard Average Remarks Time Maximum Allowable Noise dB(A) (Nov 20-21, Level, dB(A)*** 2018) 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 DENR Standard Baseline Average Remarks Time Maximum Allowable Dry dB(A) (Nov 20-21, Noise Season 2018) Level, dB(A)*** (4-5 Jun 2014 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 DENR Standard Average Remarks Time Maximum Allowable Noise dB(A) (Nov 21-22, Level, dB(A)*** 2018) 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 DENR Standard Average Remarks Time Maximum Allowable Noise dB(A) (Nov 21-22, Level, dB(A)*** 2018) 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 Noise level , dB Remarks Allowable 1:00-6:00pm Limit 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 Noise level , dB Remarks Allowable 1:00-6:00pm Limit 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 Noise level , dB Remarks Allowable 1:00-6:00pm Limit 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 Noise level , dB Remarks Allowable 1:00-6:00pm Limit Max Min
Ipo Dam Bridge 65 dB 59.2 57.1 -
Mwss Operation 65 dB 68.7 60.3 Beyond allowable Office 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 Noise level , dB Remarks Allowable 1:00-6:00pm Limit Max Min
Ipo Site Office 65 dB 60.4 56.7 -
Ipo Site 65 dB 54.8 50.5 - Downstream
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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) DENR STANDARD NOISE MAXIMUM SAMPLING TIME LEVEL ALLOWABLE REMARKS (DB) NOISE LEVEL CLASS A, DB 0500H – 0900 H (Morning) Ear Plug 61.4 50 Required 0900H – 1800 H (Daytime) Ear Plug 70 55 Required 1800H – 2200 H (Evening) Ear Plug 65.3 50 Required 2200H – 0500 Ear Plug 62 45 H (Nighttime) 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) DENR STANDARD NOISE MAXIMUM SAMPLING TIME LEVEL REMARKS ALLOWABLE (DB) NOISE LEVEL CLASS C, DB 0500H – 0900 H (Morning) Required ear 82.1 65 plug 0900H – 1800 H (Daytime) Required ear 79.3 70 plug 1800H – 2200 H (Evening) Normal, 64 65 within the limit 2200H – 0500 Ear plug 64 60 H (Nighttime) 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) DENR STANDARD NOISE MAXIMUM SAMPLING TIME LEVEL ALLOWABLE REMARKS (DB) NOISE LEVEL CLASS A, DB 0500H – 0900 Ear plug 65.4 50 H (Morning) required 0900H – 1800 Ear plug 62.6 55 H (Daytime) required 1800H – 2200 Ear plug 71.8 50 H (Evening) required 2200H – 0500 Ear plug 62 45 H (Nighttime) 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) DENR STANDARD NOISE MAXIMUM REMARKS SAMPLING TIME LEVEL ALLOWABLE (PASSED OR (DB) NOISE EXCEEDED) LEVEL CLASS C, DB 0500H – 0900 78.1 65 Required Ear plug H (Morning) 0900H – 1800 67.6 70 Normal H (Daytime)
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1800H – 2200 64 65 Normal H (Evening) 2200H – 0500 54.1 60 Normal H (Nighttime) 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) DENR STANDARD MAXIMUM NOISE REMARKS ALLOWAB SAMPLING TIME LEVEL (PASSED OR LE NOISE (DB) EXCEEDED) LEVEL CLASS A, DB 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 Over the limit 57.8 45 H (Nighttime)
October 2018
Table 49. Sound levels in Bigte Construction Work Area 2018 October Location Allowable Maximum Minimum Remarks Unit Limit Within 70 dB 59.2 57.3 allowable limit
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Location Allowable Maximum Minimum Remarks Unit Limit Front Office
Exceeded allowable limit 70 dB 89.9 77.6 (Earplugs are Portal needed)
Within 70 dB 61.5 59.9 allowable limit
MWSS Area Exceeded allowable limit 70 dB 89.2 88.7 (Earplugs
TBM (Back Up) are needed)
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Location Allowable Maximum Minimum Remarks Unit Limit Exceeded allowable limit 70 dB 86.4 73.4 (Earplugs are TBM (Control Cabin) needed)
Exceeded allowable limit 70 dB 88.3 84.2 (Earplugs are TBM (Erection Area) needed)
Within 70 dB 81.3 79.2 allowable limit
Tippler
Exceeded 70 dB 74.8 60.3 allowable limit
Wastewater Treatment Plant (Earplugs (WTP)
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Location Allowable Maximum Minimum Remarks Unit Limit are needed)
Within 70 dB 65.1 60.5 allowable limit
Industrial Gate Exceeded allowable limit 70 dB 72.7 52.8 (Earplugs are Main Gate needed)
Within 70 dB 62.2 58.3 allowable limit
Warehouse
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November 2018
Table 50. Sound Level Monitoring, 30 November 2018 (6:00pm-9:00 pm) Allowable Location Maximum Minimum Time Remarks Limit
Within allowable 65dB 54.1 50.7 7:08 PM limit
Front Office Exceeded allowable limit 65dB 81.2 80.1 7:32 PM (Earplugs are needed)
Portal Exceeded allowable limit 65dB 94.1 93.7 9:15 PM (Earplugs are needed)
Back-Up (TBM) Exceeded allowable limit 65dB 92.3 87.4 9:30 PM (Earplugs are needed)
TBM (Control Cabin)
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Allowable Location Maximum Minimum Time Remarks Limit Exceeded allowable limit 65dB 74.6 52.8 7:45 PM (Earplugs are needed)
Industrial Area (Warehouse) Exceeded allowable limit 65dB 74 51.6 7:49 PM (Earplugs are needed)
Industrial Area (Gate) Exceeded allowable limit 65dB 85 81 7:58 PM (Earplugs are needed)
Tippler Exceeded allowable limit 60dB 69.4 47.2 11:20 PM (Earplugs are needed)
Main Gate
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Allowable Location Maximum Minimum Time Remarks Limit Exceeded allowable limit 65dB 108.7 103.6 8:15 PM (Earplugs are needed
Main Gate
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December 2018
Table 51. Sound Level Monitoring, 1 December 2018 (6:00pm-9:00 pm) Allowable Location Maximum Minimum Time Remarks Limit
Exceeded allowable limit 50dB 54.1 50.7 7:08 PM (Earplugs are needed)
Front Office
Exceeded allowable limit 65dB 81.2 80.1 7:32 PM (Earplugs are needed)
Portal
Exceeded allowable limit 70dB 94.1 93.7 9:15 PM (Earplugs are needed)
Back-Up (TBM) Exceeded allowable limit 70dB 92.3 87.4 9:30 PM (Earplugs are needed)
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Allowable Location Maximum Minimum Time Remarks Limit TBM (Control Cabin)
Exceeded allowable limit 70dB 74.6 52.8 7:45 PM (Earplugs are needed)
Industrial Area (Warehouse)
Exceeded allowable limit 65dB 74 51.6 7:49 PM (Earplugs are needed)
Industrial Area (Gate)
Exceeded allowable limit 70dB 85 81 7:58 PM (Earplugs are needed)
Tippler
Exceeded allowable limit 65dB 69.4 47.2 11:20 PM (Earplugs are needed)
Main Gate
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Allowable Location Maximum Minimum Time Remarks Limit
Exceeded allowable limit 70dB 108.7 103.6 8:15 PM (Earplugs are needed
Main Car
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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) standar reference Reading, Reading, Reading, Reading, Reading, Reading, d ppm ppm ppm ppm ppm ppm Air quality parameter 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 2018 Dec Average 13 Carbon Dioxide, CO2 (ppm) 1000 NIOSH 0.029770 0.029770 0.0088 0.01 0.0093 -0.0279 14 Hydrogen Sulfide, H2S (ppm) 10-20 WHO, 2000 0.000005 0.000005 0.0000 0.00 0.0000 0.0000
Oxygen, O2 (%) 17.6- WHO, 2000 20.994605 20.994605 21.0000 21.00 20.9984 20.9996 23.5 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 WHO, 2000 0.000000 0.000000 0.000000 0.00 0.0000 0.0000 hrs) 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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standar reference Reading, Reading, Reading, Reading, Reading, Reading, d ppm ppm ppm ppm ppm ppm Air quality parameter 2018 Jul 2018 Aug 2018 Sep 2018 Oct 2018 Nov 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 WHO, 2000 22.000000 22.000000 21.0000 63.00 47.0000 47.0000 (1hr) Hydrogen Cyanide, HCN (ppm) 53.57 WHO,2004 - - - 3.77 4.5914 6.3505 (20 min to 1hr)
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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 108, 437 previous month), (m3)
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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Excavated Materials as per delivery receipt 35,000 30,000 25,000 20,000 15,000
Spoil, m3 10,000 5,000 0 201 201 201 201 8- 201 201 201 201 201 201 8- 8- 8- Feb 8- 8- 8- 8- 8- 8- Ma Jun Sep - Apr July Aug Oct Nov Dec y e t Mar Spoil Volume/ Month 5,98715,47321,53715,86723,80626,33629,26230,38930,49812,505 Axis Title
Figure 8. Excavated Material and TBM advancement
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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 Adopted Criteria Sample ID Spoil maximum Material Spoil Material Material CH CH Spoil average absolute Sample Parameter reference Sample No. 1 Sample No. 0+317.59 0+485.212 Material - concentration maximum CH 3 + Chainage 2 Chainage TBM TBM TBM CH: 881.221 for concentration CH 0+031.92 CH Tunnel Tunnel 0+629,38
characterization 0+142.36 Date of 19- 2-Feb-18 2-Feb-18 7-Apr-18 23-Apr-18 4-May-18 sampling Sept-18 Inorganic and nonmetallic constituents Total Nitrogen 25 125 soil quality ANZECC 198 205 94 76 147 417 (mg/kg) Assessment levels for soil, sediment and water Total (Contaminated Sites Phosphorus 25 2,000 Management Series) 294 1,180 1450 1560 1,040 905 (mg/kg) Department of Environment and Conservation, ANZECC organic and biological constituents Oil and Ontario Ministry of the Environment guidelines for Grease 1,500 open lake disposal of 496 353 489 589 1,190 193 (mg/kg) sediments17 Potassium (K) 60 100+ soil quality ANZECC 240 762 1,130 793 - 245 (mg/kg) 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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Adopted Criteria Sample ID Spoil maximum Material Spoil Material Material CH CH Spoil average absolute Sample Parameter reference Sample No. 1 Sample No. 0+317.59 0+485.212 Material - concentration maximum CH 3 + Chainage 2 Chainage TBM TBM TBM CH: 881.221 for concentration CH 0+031.92 CH Tunnel Tunnel 0+629,38
characterization 0+142.36 NSW EPA. Protection of the Environment Chromium Operations (Waste) 75 150 Regulation 2014. 6.9 1.0 1.4 0.9 3.6 ND (mg/kg) Application to land as engineering fill or for use in earthworks NSW EPA. Protection of the Environment Copper** Operations (Waste) 100 200 Regulation 2014. 117 121 110 88 73 (mg/kg) Application to land as engineering fill or for use in earthworks Iron (mg/kg) 17 26,600 24,900 15,900 - 10,700 NSW EPA. Protection of the Environment Operations (Waste) Lead (mg/kg) 50 100 Regulation 2014. 6,610 ND ND ND ND ND Application to land as engineering fill or for use in earthworks Manganese ND 916 345 330 396 286 (mg/kg) NSW EPA. Protection of the Environment Operations (Waste) Nickel (mg/kg) 30 60 Regulation 2014. 129 9.4 2.3 2.3 5.9 2.5 Application to land as engineering fill or for use in earthworks
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Adopted Criteria Sample ID Spoil maximum Material Spoil Material Material CH CH Spoil average absolute Sample Parameter reference Sample No. 1 Sample No. 0+317.59 0+485.212 Material - concentration maximum CH 3 + Chainage 2 Chainage TBM TBM TBM CH: 881.221 for concentration CH 0+031.92 CH Tunnel Tunnel 0+629,38
characterization 0+142.36
NSW EPA. Protection of the Environment Operations (Waste) Zinc (mg/kg) 150 300 Regulation 2014. 8.1 29 31 47 21 20 Application to land as engineering fill or for use in earthworks
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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 Fish sampling at near Sitio Settling, Brgy Bigte preparation of various samples 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
Sorting of biomass
Amphibian observation
Setting up of monitoring plot in MWSS Bigte Rodent traps held by a Dumagat field Compound 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 0 previous months
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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Laboratory Results
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Tree Cutting Permit
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NCIP
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Tunnel Geotechnical Profile
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