Environmental Monitoring Report · Angat Water Transmission Improvement Project – Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December v Table 44. Sound

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

i

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.



ii

Contents

1 Introduction viii

Background 2

Project Data 4

Project Implementation Progress 4

Overall Progress as of 31 December 2018 4

Site Works / Activities for the Period (as of December 2018) 8

Contractors Resources 10

Site visits/inspections by the supervision consultant to monitor

compliance of the contractors and subcontractors 15

2 Compliance with ADB loan covenants and applicable government laws,

regulations and requirements 16

Status of compliance with government environmental requirements: 16

3 Changes in project scope 23

4 Summary of Environmental Mitigations and Compensation Measures

Implemented 24

Emission/Wastewater Discharge (Source) Monitoring Program (if relevant or

required in the EMP) 35

Summary of Monitoring 35

Assessment 38

Water Quality Monitoring Program 38

Summary of Water Quality Monitoring for Bigte and Ipo River (July to

December 2018) 38

Results of Bigte and Ipo River (July to December 2018) 38

Water Quality Results for Bigte River (July to December 2018) 42

Water Quality Results for Ipo River (July to December 2018) 64

Water quality in IDSSP 82

Assessment of Bigte River, Ipo River and IDSSP (July to December

2018) 85

Air and Noise Quality Monitoring Program 86

Summary of Air Quality Monitoring 86

Result of Ambient Air Quality Monitoring (September and November

2018) 88

Assesment3 for Air Quality Monitoring 91

Summary of Noise Quality Monitoring (July to December 2018) 91

Result of Noise Level Monitoring (September and November 2018) 92

Assesment3 for Noise Quality Monitoring (September and November

2018) 96

Summary of Sound Level Monitoring in General Construction Sites 96



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Assessment for Noise Quality Monitoring (July to December 2018) 114

Results of Tunnel Air Quality Monitoring 114

Assessment for Indoor Air Quality Monitoring (July to December 2018)

117

Spoil Management and Monitoring Program 117

Summary of Sediment Quality of Spoil/Excavated Materials 117

Results of Spoil Sediment Quality 119

Assessment for Sediment Quality of Spoil / Excavated Material 123

Freshwater Monitoring Program (Wet Season) 123

Terrestrial Ecology Monitoring 124

Wet Season 124

5 Key Environmental Issues 128

Key activities implemented 128

Key Issues Identified 128

6 Complaints 133

Details of Complaint/s 133

7 Conclusion and Recommendation 134

Overall Progress of Implementation of Environmental Management

Measures 134

8 Appendices 135

Site Works / Activities for the Period (July to November 2018) 135

Progress Photos (as of December 2018) 151

AWTIP Monitoring Matrix 159

Laboratory Results 177

Tree Cutting Permit 178

Terrestrial Ecology Monitoring Report 307

Related Documentation on Hazardous Materials 414

NCIP 425

Tunnel Geotechnical Profile 426



iv

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 22. Water Quality Results for SWB2A ................................................................ 51


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 32. Water Quality in IPO5 ................................................................................... 81

Table 33. Water Quality in IDSSP (Inside and Outside Curtain) .................................. 83

Table 34. Results of Ambient Air Quality Monitoring, September 2018 ....................... 89

Table 35. Ambient Air quality, November 2018 ............................................................ 90

Table 36. Noise level in Ipo Dam Compound, 2018 September .................................. 92

Table 37. Noise level in San Mateo Brgy. Hall, 2018 September ................................ 92

Table 38. Noise level in MWSS Bigte Compound, 2018 September ........................... 93

Table 39. Noise level in Ipo Dam Compound, 2018 November ................................... 94

Table 40. Noise level in San Mateo Brgy. Hall, 2018 November ................................. 95

Table 41. Noise level in MWSS Bigte Compound, 2018 November ............................ 95

Table 42. Sound levels in Bigte Construction Work Area 2018 July, morning ............. 97

Table 43. Sound levels in Ipo Construction Work Area 2018 July, evening (9:00 pm –

10:00 pm) .................................................................................................................... 100



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Table 44. Sound levels in Ipo Work Area – Sitio Ipo (Vicinity of Watershed Building,

across the Ipo Dam on 15 Aug 2018 (9:00 AM – 9:00 PM)........................................ 102

Table 45. Sound levels in Bigte Work Area – Portal Area (at tally room vicinity) on 15

Aug 2018 (9:00 AM – 8:00 PM) .................................................................................. 102

Table 46. Sound levels in Sitio Settling (about 100m from portal, MWSS Bigte) on 15

Aug 2018 (9:15AM to 8:45 PM) .................................................................................. 103

Table 47. Sound levels in Industrial Area (about 100m from portal, MWSS Bigte) on 15

Aug 2018 (9:30 AM to 8:30 PM) ................................................................................. 103

Table 48. Sound levels in Outside the Tippler Area (about 200m from portal, MWSS

Bigte on 15 Aug 2018 (10:00 AM to 9:00 PM) ............................................................ 104

Table 49. Sound levels in Bigte Construction Work Area 2018 October.................... 104

Table 50. Sound Level Monitoring, 30 November 2018 (6:00pm-9:00 pm) ............... 108

Table 51. Sound Level Monitoring, 1 December 2018 (6:00pm-9:00 pm) ................. 111

Table 52. Tunnel air quality monitoring (July to December 2018) .............................. 115

Table 53. Spoil/ Excavated Materials ......................................................................... 117

Table 54. Sediment Quality of Spoil/ excavated material ........................................... 120

Table 55. List of grievances as of December 2018 ................................................... 133



vi

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



vii

Executive Summary

General

The Contractor, CMC di Ravenna, monitors its performance against the CEMMP

obligations. Because of this, it will record non-compliance where performance does not

meet the original obligations. In many cases this should not be taken to mean that the

outcomes are bad and where alternative courses of action have been adopted CMC and

MWSS has recorded this.

This report highlights prevailing issues about the project. Only obligations which are

assessed as in progress, non-compliant (in specification and time schedule), and not

applicable are presented in the body of the report. A full review of the CEMMP obligations

is presented in the CA matrix in excel format.

The layout of this report followed recommended ADB monitoring report structure.

Assessment of compliance

The following are the definition of remarks used to assess the CEMMP, EMP of IEE and

EIA and other environment related project documents.

(a) COMPLIANT – completed according to schedule and specifications in the CEMMP and other relevant ADB policies;

(b) NON-COMPLIANT – not completed according to schedule and specification and/or not according to specification;

(c) IN PROGRESS – partly compliant and pending for completion (d) NOT APPLICABLE – obligations not applicable to AWTIP project (e) CANNOT DOCUMENT COMPLIANCE – insufficient document or no document

provided to support assessment of compliance

A full review of the CEMMP and other relevant project documents on environment is presented in Appendix 8.3.

No grievance case reported in the period of July to December 2018.

Water quality monitoring and air quality monitoring are done by CRL Laboratories every month and quarterly, respectively. Portable Multi-meter and sound level meter were procured by CMC to do their own monitoring activities. Freshwater and terrestrial ecology monitoring are done during dry and wet seasons starting May 2018.

A water treatment facility is now operational to treat the tunnel’s effluent.



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1. Introduction

Background

The Angat Water Transmission Improvement Project (AWTIP) is part of a bigger scheme of modernization and improvement of the Metro Manila Water Distribution Network. Its main source of water is generated from the Angat watershed. This is supplemented by water which is fed through the Umiray tunnel that provides around 35% of the water for domestic use to Metro Manila and parts of adjacent 2 provinces. Currently, the delivery of water from Ipo dam basin to the Bigte sedimentation plant happens through 3 tunnels, 1 of which is quite obsolete. The progressive deterioration of the existing tunnels, or the occurrence of an earthquake (which is very likely since the area is close to two active faults), may seriously compromise the provision of water to millions of people.

The project is located in the province of Bulacan, at around 50 km north of Manila, close to Norzagaray, municipality of 150,000 inhabitants which hosts several important cement industries and which is easily accessible via highway or normal roads.

More than 95% of the water supply for Metro Manila comes from a single source: The Umiray–Angat– Ipo, or Angat system. Water from the Angat reservoir is conveyed through three parallel tunnels followed by six parallel aqueducts, to water treatment plants in Metro Manila. The treated water is then distributed to households, businesses, and industries in Metro Manila, and parts of Cavite and Rizal provinces. The transmission’s tunnel system which is about 75 years old, has not been assessed ever since. The earlier tunnels, tunnels 1 and 2 are not in compliance with current structural and seismic requirements. These factors could lead to serious interruptions of Metro Manila’s water supply. The proposed project will construct the urgently required fourth parallel tunnel. This new tunnel will not increase system capacity, but it will enable the rehabilitation or decommissioning of the upstream tunnels and downstream aqueducts.

The proposed project aims to (i) help restore the full design capacity of the Angat systems and thus ensure the sustainable provision of the water supply distribution system, and (ii) mitigate the risk of a total loss of water supply to Metro Manila and portions of Cavite and Rizal provinces. Both objectives are essential for the stable economic growth of Metro Manila and the Philippines. The government has asked the Asian Development Bank (ADB) to finance this investment. Figure 1 shows the general location of the project.



3

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



4

Project Data

Table 2. Key information about the project

Project Name Angat Water Transmission Improvement Project

(AWTIP)

Components 6.4 km Tunnel Construction, Intake/Outlet

Structure, and Interconnection to Basin of

Aqueduct No. 5

Location Norzagaray, Ipo Dam to Bigte Basin

Duration 52 months (4 years and 4 months) Design Period =

6 months Construction Period = 46 months

Source of Fund Asian Development Bank (Loan 3377 PHI-AWTIP)

Contractor Cooperativa Muratori Cementisti di Ravenna (Italy)

Contractor’s Project Manager Mr. Salvatore La Valle

Project Manager/ CO for MWSS Jose D. Dorado Jr.

Consultant’s Project Manager Mr Choi Kihyung, DOHWA Engineering Co. Ltd.

Notice to Proceed (NTP) May 31, 2016

Actual Date of Start June 01, 2016

Target Completion September 07, 2020

Project Implementation Progress

Overall Progress as of 31 December 2018

Table 3. Key project progress

Description Actual (Previous

Month)

Actual (This

Month)

Actual (Cumulative)

Plan to Date

Variance to Date

S1 Design Services

2.84% 0.00% 2.84% 2.84% 0.00%

A-1 Site Facilities

1.89% 0.01% 1.90% 1.90% 0.00%

A-2 Inlet Works Including Cofferdam and Auxillary Mechanical Equipment

2.38% 0.02% 2.40% 2.34% 0.06%

A-4 Tunnel and Portals

73.52% 3.22% 76.74% 75.72% 1.02%

A-3 Outlet Works

0.61% 0.00% 0.61% 0.61% 0.00%

TOTAL 81.24% 3.25% 84.89% 83.41% 1.08%



5

Tunnel

The total excavation by TBM is at 5,657 m as of December 31, 2018.

Total excavation progress/ TBM location (m) 5, 988

Previous TBM Excavation progress (starting 2018 Feb 13 until previous month), (m)

5,657

TBM Excavation progress in 2018 December, (m) 331

Average daily TBM excavation progress in 2018December, (m) 16 excavation days

20.69

Total number of rings installed, (no) 4, 610

Rings installation progress (starting 2018 Feb 13 until previous month), (No)

4,356

Rings installed in 2018 December 254

Average daily rings installed in 2018 December 15.88

Total excavated materials/ spoil (m3) 114, 781

Excavated materials (starting 2018 Feb 13 until previous month), (m3)

108, 437

Excavated materials in 2018 December, (m3) 6, 344

The TBM location and tunnel profile by December 2018 are shown in Figures 2 and 3, respectively.

AWTIP Tunnel 4 Semi Annual Environmental Monitoring Report 4


6

Figure 2. TBM Location as of December 2018



7

Figure 3. TBM Location and profile



8

Site Works / Activities for the Period (as of December 2018)

All of the project site facilities were completed in July 2017 and in continuous operation until this period. The accomplished site work / activities for the last month of the period are given below while the monthly accomplishments from July to November are provided in Appendix 8.1. Photo documentation of the project area and activities are presented in Appendix 8.2.

A. Inlet

Permanent Access Road

Works in the permanent access road area had resumed starting from the first week of October 2018. The following are the progress for the period:

• Concrete breaking and excavation works to the required elevation at Sta. 0+827 to Sta. 0+865.

• Casting of curbs and gutter at Sta. 0+660.

B. Structures along Permanent Access Road

• Soil nailing including grouting works from Sta. 0+827 to Sta. 0+865, and Sta. 0+530

• Drainage pipes installation from Sta. 0+827 to Sta. 0+865.

• Shotcreting works (1st and 2nd layer) on different locations / stations; from Sta. 0+595 to 621, Sta. 0+580 to 630, Sta. 0+660 to 675, and from Sta. 0+827 to 865.

• Fabrication and installation (restoration) of new silt curtain.

• Installation of piezometer at Sta. 0+760.

C. Outlet

Conveyance Channel and Drainage System

• Nothing to report for the period.

D. Tunnels and Portals

Site Works (Bigte Area) and TBM Preparatory Works

• Preparatory works completed.

Tunnel Excavation

TBM excavation progress the period was 331-m only compared to 800-m last month. This difference was mainly due to the positioning of the TBM prior to its waiting period for the breakthrough milestone date and partly because of yuletide season and New Year’s vacation. Despite this figure, tunneling works is still ahead of schedule by 1.23% (see progress summary below). The excavation works already reached Ch. 6+007.232 as of the end of the period which leaves to about 440-meters balance to excavate. On the other hand, the slope stabilization acceleration works is on steady progress which is forecasted to be completed on or even ahead (as per the current update) of the scheduled milestone on 08-May-2019.



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Major Works for the period:

• TBM excavation for the period is from Ch. 5+676.231 to Ch. 6+007.23 (a total of 331 m).

• Precast segment ring linings installed for the period is from ring no. 4356 to 4610.

• Pea gravel backfilled for the period is between ring nos. 4353 to 4607.

• Back-grouting works completed for the period from 1361 cu.m. to 1935.4 cu.m.

Progress Assessment for the Period:

Planned: 91.68 % Actual: 92.91 % Slippage: +1.23 % (ahead of schedule) Precast Concrete Lining Segments

To date, about 96% of the total number of ring segments had already been manufactured, wherein 95% were already delivered to the site. The manufactured number of segment lining for the period was 1140. The remaining segment to be manufactured is about 664 segments. E. Geological and Geotechnical Works 1. Tunnel Tunnel Face Mapping to the Excavated Area

• MAP-198 to 199 at Ch5+676.07 to Ch5+717.87, MAP-205 at Ch5+841.78 and MAP-209 at Ch5+983.67, light to dark greenish gray, coarse medium-grained aphanitic to basaltic texture of Andesite. The rock assemblage is mafic rich shows a high presence of dark silicate minerals. Observed joints are closely to widely-spaced joints filled with hard and soft minerals, semi undulating to steeped planar joint planes and has slightly rough to smooth roughness and has narrow to tight aperture. Fair-III to Good-II Rock Class with dry groundwater condition.

• MAP-200 to 201 at Ch5+763.34 to Ch5+776.08 and MAP-203 to MAP-204 at Ch5+816.94 to Ch5+831.32 and MAP-209 at Ch5+983.67, mottled dark to light greenish gray, medium-grained to agglomeratic texture of Tuff. The rock assemblage is mafic rich shows a high presence of dark silicate minerals. Observed joints are closely to widely-spaced, semi undulating to stepped planar joint planes and has slightly rough to smooth roughness and has narrow/gapped to tight aperture. The wall rock is intact with discontinuities. At Ch5+763.34, intercepted minor fault with thickness of ±0.80m infilled with gouge materials and broken tuff fragments. Fair-III to Good-II Rock Class with dry groundwater condition.



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• MAP-202 at Ch5+802.58, MAP-206 to MAP-208 at Ch5+958.85 and MAP-210 at Ch6+007.23, dark greenish gray, medium-grained to amygdaloidal texture of Basalt. The rock assemblage is mafic rich shows a high presence of dark silicate minerals. Observed joints are closely to widely-spaced, semi undulating to planar joint planes and has slightly rough to smooth roughness and has narrow/gapped to tight aperture infilled with hard and soft minerals. The wall rock is intact with discontinuities. Fair-III to Good-II Rock Class with dry groundwater condition.

Geological Probing Forecast ahead of the Tunnel Face

• PD-TBM-54 at Ch5+793.6 to Ch5+822.6 intercepted a Good-II to Fair-III class of Fresh sound to Fractured rock Basalt (GU1). The average penetration rate is 0.85 m/min.

• PD-TBM-55 at Ch5+832.8 to Ch5+861.8 intercepted a Good-II to Fair-III to Good-II class of Moderately strong to fresh sound strong Andesite (GU1). The average penetration rate is 0.73 m/min.

• PD-TBM-56 at Ch5+890.1 to Ch5+919.1 intercepted a Good-II to Fair-III to Good-II class of Fresh sound to Fractured rock Basalt (GU1). The average penetration rate is 0.80 m/min.

• PD-TBM-57 at Ch5+949.8 to Ch5+978.8 intercepted a Good-II to Fair-III to Good-II class of Fresh sound to Fractured rock Basalt (GU1). The average penetration rate is 0.96 m/min.

Geological Interpretation for Tunnel

The interpreted as-built geological section for one thousand five hundred to three thousand (1500 to 3000) meter excavation is in progress. Future Geotechnical Works

• Map digitization and manual plotting of latest tunnel face mapping data obtained during TBM excavation

• Database filling and data summary of new gathered information

• Convergence monitoring in the tunnel

Contractors Resources

(a) List of Production Construction Staff

Table 4. Workforce as of December 31, 2018

Entity Filipino Foreigner

TOTAL # % # %

CMC permanent staff 141 58% 21 9% 162

CMC contract workers / utilities

75 31% 0 0 75



11

CMC consultants 2 1% 2 1% 4

SUB-CON Don Vic Construction (AWTIP/IDSSP)

79 100% 0 0% 79

Mapolcom 21 100% 0 0% 21

Morse Hydraulic 3 100% 0 0% 3

Trevi Foundations Philippines(AWTIP/IDSSP)

48 92% 4 8% 52

Bunzu Construction (Manpower Supply)

38 100% 0 0% 38

Fabrimetrics 11 100% 0 0% 11

Table 5. Filipino Workforce as of December 31, 2018 – by geographic location

Entity

Personnel employed from Brgy San Mateo

Personnel employed from Bgry Bigte

Personnel employed from other Bgrys in Norzagaray

Personnel employed from other municipalities/ cities in Bulacan

Personnel employed from other provinces TOTAL

# % # % # % # % # % CMC permanent staff

25 12% 33 15% 18 7% 32 13% 54 22% 162


15 6% 10 4% 12 5% 10 4% 28 12% 75

CMC consultants 0 % 0 % 0 % 0 % 4 1% 4

SUB-CON

Don Vic Construction (AWTIP/IDSSP)

75 95% 2 3% 1 1% 1 1% 0 0% 79

Mapolcom 2 10% 19 90% 0 0% 0 0% 0 0% 21

Morse Hydraulic 0 0% 0 0% 0 0% 0 0% 3 100% 3


7 13% 0 0% 0 0% 0 0% 45 87% 52

Fabrimetrics 1 8% 0 0% 0 0% 0 0% 10 92% 11


4 11 1 3 1 3 17 45 15 39 38



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Table 6. Workforce as of December 31, 2018 – by Gender

Entity Male Female

TOTAL # % # %



71 29% 4 2% 75


SUB-CON


70 89% 9 11% 79

Mapolcom 21 100% 0 0% 21



50 96% 2 4% 52


38 100% 0 0% 38


Table 7. Workforce as of December 31, 2018 – Dumagats

Entity Male Female

TOTAL # % # %



3 100% 0 0% 3


SUB-CON


65 89% 8 11% 73

Mapolcom 0 0% 0 0% 0



7 100% 0 0% 6


4 100% 0 0% 4




13

The project implements environmental monitoring programs. Such monitoring surveys require local guides/ assistance. It should be noted that there is a total of 8 Dumagats from Ipo Dam site who assisted in River Ecology Monitoring (5 Dumagats) and Terrestrial Ecology Monitoring (3 Dumagats).

Table 8. Workforce as of December 31, 2018– by Age Groups

Entity 18-25 26-35 36-45 46-60 Over 60 TOTA

L # % # % # % # % # % CMC permanent staff

10 4% 60 25% 65 25% 25 10% 2 1% 162


23 10% 15 7% 17 7% 19 8% 1 1% 75

CMC consultants 0 0% 0 0% 1 1% 3 1% 0 0% 4

SUB-CON Don Vic Construction (AWTIP/IDSSP)

14 18% 32 41% 28 35% 5 6% 0 0% 79

Mapolcom 11 52% 5 24% 5 24% 0 0% 0 0% 21

Morse Hydraulic 1 33% 2 67% 0 0% 0 0% 0 0% 3


17 33% 16 31% 9 17% 10 19% 0 0% 52


8 21% 10 26% 18 47% 2 5% 0 0% 38

Fabrimetrics 0 0% 8 62% 5 38% 0 0% 0 0% 13

(b) Recruitment

Table 9. Staff requirement in the next 3 months

No. of Required

Plant Engineer 1

Yard Foreman 1



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(c) List of Equipment

Table 10. Contractor: CMC di Ravenna

Item Quantity

Generator Set 7 Air Compressor 5 Telescopic Handler 1 Forklift 12 Backhoe Ladder 6 Welding Machine 3 Tower Light 1 Dropside Vehicle 4 Locomotive 2 High Pressure Washer 3 Submersible Pump 1 60 Ton Crane 1 65 Ton Crane (Rental) 1 Mini Backhoe 1 High Bed Trailer 2 Grouting Plant 1 Wheel Excavator 1 Vibratory Compactor 1 One Bagger Mixer 2 Man Lift Truck 1 Shotcrete Machine 2 Mini Dump Truck 1 Backhoe with Breaker 1 Dump Truck 1 TOTAL 51

Table 11. MAPOLCOM Construction

Item Quantity

Loader 1 Dump Truck 6 TOTAL 7

Table 12. Trevi Foundation

Item Quantity

SM 400 1 Cometria Pump 1 Air Compressor 1 Generator 1 Grouting Machine 1 Compressed Air Tank 1 SM 103 1 Service Vehicle/Truck 1



15

Item Quantity

Tower Light 1 SM 14 1 TOTAL 10

Table 13. Don Vic Construction

Item Quantity

Loader 1 Dump Truck 6 TOTAL 7

Site visits/inspections by the supervision consultant to monitor compliance of the

contractors and subcontractors

The construction supervision consultants, DOHWA Engineering Co., Ltd., have been commissioned by MWSS. The consultants started in September 2018. The DOHWA has an International and National Environment Specialists for the environmental supervision of the project. The National Environment Specialist or together with the International Environment Specialist is conducting at least two (2) days per week monitoring of compliance with the mitigation measures specified in the EMP. Ocular inspection of the work areas, the activities of contractors and subcontractors, and the operation of installed structures and/or facilities for mitigation measures are conducted to verify the compliance. Any lapses or noncompliance noted during the site inspection is directly communicated to the concerned contractor or subcontractors for immediate implementation of corrective actions.



16

2. Compliance with ADB loan covenants and

applicable government laws, regulations and

requirements

Status of compliance with government environmental requirements:

Tables 14 and 15 present the permits acquired for the project. Copies of the permits are in Appendices 8.5 and 8.7 of this report.

Table 14. Permits Environmental

Laws Permits Date of Issue/ remarks Expiry Date

P.D. 984 (Pollution Control Law)

A/C No. (Authority to Construct) -

Please refer to Section 3 (k) of Republic Act 6234, as amended, allows the MWSS “to construct work across , over, through and/or alongside any stream, watercourse, canal, ditch, flume, street, avenue, highway or railway, whether public or private as the location of said works may require; X X X the system is hereby given the right-of-way to locate, construct, and maintain such works over and throughout the lands, including any street, avenue or highway owned by the Republic of the Philippines, or any of its branches, or political subdivisions, and is given right of immediate entry and to prosecute any undertaking thereon without any further requirement or restriction other than due notice to the office or entity concerned X X X”

PO No. (Permit to Operate) -

Please see row on RA 8749 (Phil Clean Air Act) of this table

PD 1586 (Establishing EIS System)

ECC1 (Environmental Compliance Certificate)

ECC -CO-1508-0022 7 May 2017.

The certificate shall cover the following: 1. construction of water tunnel #4 with

6.4 kilometer length and 4 m diameter from Ipo Dam, Barangay San Mateo to Barangay Bigte, with associated facilities such as Contractor’s Work areas, Spoil Disposal Sites as enumerated in the EIS

2. Repair and rehabilitation works of Tunnel Nos 1,2,3

3. Water transmission operations of Tunnels No 1,2,3 and 4 for an aggregate water flow of up to 43 m3/sec

-



17

Environmental Laws

Permits Date of Issue/ remarks Expiry Date

4. Fencing of the Right-of- way ECC2 Not applicable. No change in project

ECC3 Not applicable. No change in project

RA 6969 (Toxic Substances and Hazardous and Nuclear Waste)

DENR Registry ID GR-R3-14-01197 CCO Registry (Chemical Control Order)

Not applicable.

Importer Clearance No

Not applicable.

Permit to Transport

PTT-R3-14-01368 06 August 2018

2018 Feb 06

P.D 984 (water Pollution)

Discharge Permit Discharge Permit No. DP-18K-03BU-2381-R

2019 November 30

RA 8749 (Phil Clean Air Act)

A/C No.

PO No.1

FLA- 17J-03BU-549 (1-unit 40KW Standby GenSet) 2017 October 20 Certificate of final electrical inspection was given to CMC by the LGU Norzagaray for the 50KVA (control number 28787) Genset for temporary power. date issued on 10 August 2018

2018 October 30

PO No.2

FLA- 17J-03BU-550 (1-unit 20KW Standby GenSet) 2017 October 20 Certificate of final electrical inspection was given to CMC by the LGU Norzagaray for the 25KVA (control number 28789) Genset for temporary power. date issued on 10 August 2018

2018 October 30

PO No. 3

FLA-18J-03BU-550 (1-unit 20KW Standby Genset) 2018 September 17 Certificate of final electrical inspection was given to CMC by the LGU Norzagaray for the 25KVA (control number 28789) Genset for temporary power. Date issued on 10 August 2018 (see MPR 2018 Sept, Append 1)

2019 October 30

PO No. 4

FLA-18J-03BU-549 (1-unit 40KW Standby Genset) 2018 September 17 Certificate of final electrical inspection was given to CMC by the LGU Norzagaray for the 50KVA (control number 28787) Genset for temporary power. Date issued on 10 August 2018 (see MPR 2018 Sept, Append 1)

2019 October 30

P.O No. 5 FLA-18H-03BU-825 (1-unit 100KW Temporary Diesel Genset) 2019 August 02

2019 August 30



18

Environmental 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)

P.O No. 6

FLA-18G-03BU-815 (1-unit 80KW Temporary Diesel Genset) Certificate of final electrical inspection was given to CMC by the LGU Norzagaray for the 100KVA (control number 28788) Genset for temporary power. Date issued on 2018 August 10 (see MPR 2018 Sept, Append 1)

2019 July 30

PD 705 (The Forestry Reform Code Of The Philippines)

Tree Cutting Permit

Tree cutting permit dated September 23, 2016 (10 assorted tree species in Bigte) issued by CENRO Tabang

September 30, 2016

Tree cutting permit dated October 5, 2016 (38 mixed trees in Brgy San Mateo and Bigte) issued by MENRO Norzagaray

October 20, 2016

Tree cutting permit dated November 10, 2016 (10 assorted fruit tree species in Bigte) issued by CENRO Tabang

November 25, 2016

Tree cutting permit dated March 16, 2017 (10 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang

March 31, 2017

Tree cutting permit dated April 3, 2017 (10 assorterd fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang

April 18, 2017

Tree cutting permit dated April 21, 2017 (10 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang

May 6, 2017

Tree cutting permit dated March 20, 2017 (50 trees in Brgy San Mateo and Bigte) issued by MENRO Norzagaray

April 4, 2017

Tree cutting permit dated January 29, 2018 (20 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang

February 14, 2018

Tree cutting permit dated February 1, 2018 (10 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang

February 16, 2018

Tree cutting permit dated February 26, 2018 (15 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang

March 13, 2018

Tree cutting permit dated March 13, 2018 (25 assorted fruit tree species in the Ipo Dam Access Road) issued by CENRO Tabang

April 13, 2018

Tree cutting permit dated November 26, 2018 (4 fruit bearing trees/

Dec 3, 2018



19

Environmental 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 issued by NPC

Land use permit (2017 –LUP-03) dated 14 July 2017 was issued by NPC to MWSS

25 years (Approx. July 2042)

Garbage Hauling and Disposal

May 30, 2017 December 30, 2017

expired and renewed

January 1, 2018 December 30, 2018

Mayor’s Permit Permit number: 2017-0722 Date of Issue: June 5, 2017

December 31, 2017 Expired and renewed

Permit number: 2018-0126 Date of Issue: January 11, 2018

December 31, 2018

Excavation/slope stabilization Permit

Permit number: 2017-11-0090 November 29, 2017

Storage Building Permit BP #2017-11-0091 November 29, 2017

PCO Accreditation – Hector Veloso

29 September 2017 29 September 2020

Demolition Permit (Permit to demolish pedestrian bridge of the Old Ipo Dam watch tower)

22 March 2018

Building Permit No 2018- 03-0001 Applied at the Municipality of Norzagaray on 22 March 2018 Name of proponent to be amended from MWSS/ CMC to MWSS/ CMC/ Maynilad/ Manila Water Target date: week 1 July 2018



20

Permits Date of Issue/ remarks Expiry Date Remarks

Free and Prior Informed Consent (FPIC)

In progress. 2017 08 17-18 Field based investigation by NCIP 2018 0804 First Community Assembly 2018 0829 second community assembly 2018 0914 Consensus Building. However postponed. 2018 1009 scheduled Concensus Building however postponed by NCIP. 2018 1218 new schedule of concensus Building

Table 16. Safety Report as of December 31, 2018 Previous This Period To Date

Average Manpower 336 -25 311

CMC di Ravenna 265 -12 253

Sub-contractor 71 -13 58

Safe Man-hours 1,396,516.00 94,534.00 1,491,050.00

CMC di Ravenna 750,475.00 75,520.00 825,995.00

Sun-contractor 646,041.00 19,014.00 665,055.00

Major Incidents1 0 0 0

Minor Incidents2 3 0 3

Slight Incidents 10 0 10

Activity Previous This Period To Date

Incidents / Cases

Vehicle Incidents3 8 0 8

1 Major Incidents – defined as an acute incident such as major discharge/emission or a fire/explosion, which immediately or

subsequently causes several serious injuries and/or fatalities, serious harm to environment and/or loss of substantial material assets.

2 Minor Incidents – an accident that causes minor damage. 3 Vehicle Incidents – when a motor vehicle strikes or collides another vehicle, a stationary object, a pedestrian, or an animal



21

Previous This Period To Date

Near Misses4 19 0 19

First-Aid Cases5 10 0 10

Medical Treatment Cases6 2 1 3

Restricted Work Cases7 0 0 0

Lost-Time Cases8 - - -

Nurse Consultation 1,427 90 1,517

Meeting/s

No. of Safety Meetings 39 8 47

No. of Toolbox Meetings 712 88 800

No. of People Inducted/Oriented

916 14 930

No. of Safety Observations 319 28 347

No. of Inspection Audits 215 10 225

Training Activity/ies and Number of Participants

Hand and power tools 13 0 13

Personal Protective Equipment (PPE)

47 0 47

Fire Prevention 116 0 116

Ladder Safety 66 0 66

Confined Space 163 0 163

Working at Heights 31 0 31

First Aid and CPR 40 0 40

Emergency and Evacuation Drill

5 0 5

Defensive Driving 26 0 26

Electrical Safety 35 0 35

Hazardous Materials Handling 8 0 8

No. of People Trained (Disaster awareness and

management) 113

0

113

No. of People Trained (Self Resuscitator)

42 0 42

Refuge Chamber 23 0 23

Self-Contained Breathing Apparatus

21 0 21

Total number of people trained 773 0 773

4 Near Misses – unplanned event that has the potential to cause, but does not actually result in human injury, environmental or equipment damage, or an interruption of normal operation. 5 First Aid Cases – workers injury cases administered immediately after the injury occurs at the location where it occurred. 6 Medical Treatment Cases – recordable incident involving injury or illness that has required management and care of the patient

above and beyond first aid, but not severe enough to be a reportable fatality or lost work day case or restricted work day case. 7 Restricted Work Cases – when a person is so injured that they cannot perform their normal duties. Therefore they are transferred

temporarily to some other jobs (light duties). 8 Lost-Time Cases – refer to the number of lost-time injuries within a given accounting period, relative to the total number of hours

worked in that period.



22

Previous This Period To Date

No. of Emergency and Evacuation Drill 5 0 5

Number of Trainings Conducted 16 0 16



23

2 Changes in project scope

No change in project scope.



24

3 Summary of Environmental Mitigations and Compensation Measures

Implemented

The contractor, CMC di Ravenna, monitors its performance against contractual obligations stated in various project documents such as the CEMMP, Employer’s Requirement Document, and Environmental Compliance Certificate, IEE among others. This section of the report highlights major measures implemented and prevailing issues about the project. Only obligations which are assessed as in progress, non-compliant (in specification and time schedule), and not applicable are presented in the body of the report

A full review of the CEMMP, IEE, and other obligations is presented in the compliance matrix in Appendix 8.3 of this report. Below are the summary of mitigation measures on prevailing issues and Table 17 presented the major monitoring programs implemented.

Environmental Aspect

Potential Impact Possible Approach/ Mitigating Measures

Compliance Status

Remarks

Physical

(Land)

Environment

Soil and Erosion due to: · soil disturbance · vegetation clearing

Protect slopes with any one or combination of bonded fiber matrices, erosion control blankets, silt fence, fiber rolls, and keeping stormwater off the slopes through diversion channels and/or berms.

Compliant Ipo Contractor’s Work Area

The project site in Ipo is characterized by steep slopes of transported materials and loose soil. With this area condition, slopes along some sections of the road have been installed with threaded rock bolts/ soil nails. Slope stabilization permit for Ipo Construction Site has been obtained in November 2017 and slope stabilization works is almost complete.



25



Compliance Status

Remarks

Silt curtains have already been installed in May 2018

Slope protection at Ipo Contractor’s Work Area.



26



Compliance Status

Remarks

Bigte Contractor’s Work Area

Geocomposite steel mesh with anchor bolts has been installed at the portals; geotextile are installed in the slopes along the railway going to tippler area and at the tippler area.

Tippler Area and Geotextile along the railway



27



Compliance Status

Remarks

Water Impact on surface water quality due to/ from: · Contaminants from materials used and construction activities and processes · Siltation from soil erosion, spoil disposal area, dewatering excavations, etc · Water quality Deterioration of water quality in Ipo Dam and Bigte river Tributary during construction

At the active work sites Mitigating contaminants · Provide adequate sanitation facilities and water supply at work sites and workers’ camp. Enforce observance of good sanitation practices by workers.

Compliant Portalets are provided in all construction sites. Construction of office facilities includes septic tanks at the CMC Office.

Construction of septic tank of CMC Office Water purification tanks to provide drinking water are installed at the CMC Office in Bigte and workers' camp/ accommodation at Villa Antonio (in San Jose del Monte, Bulacan). All other workers' apartments are provided with AC rooms, domestic water supply, and drinking water, among others.



28



Compliance Status

Remarks

Water treatment facility for drinking water Subcontractors have separate portalets and water supply (drinking and domestic) for their workers. Water treatment plant at Industrial area is already constructed in May 2018.



29



Compliance Status

Remarks

Water Treatment Plant in Bigte High coliform was reported in segment of surface water where there are communities along the riverbanks. Although, the construction camp is near the riverbank, portalets has been provided.



30



Compliance Status

Remarks

Portalets provided at construction sites



31



Compliance Status

Remarks

Sedimentation ponds in Ipo; and Bigte prior to treatment of water to WTP Construction area at the inlet is a steep slope. No spillage reported in July 2017-December 2018 Monthly water quality monitoring is being done by CRL Laboratories with the following parameters: temperature, pH, electric conductivity, turbidity, color, TDS, ORP, dissolved oxygen, BOD, coliform (total and fecal) and heavy metals (See sampling location and results on the report).

Water b) lowering of water level of wells in nearby

Monitor for potential groundwater depletion in existing wells in the vicinity.

Not Applicable

There were no water cell/ aquifer traversed by the TBM during tunnel excavation along the alignment which is characterized to have community above ground. Action is deemed not needed.



32



Compliance Status

Remarks

communities due to tunneling, pumping/extracting of tunnel drainage water

Provide interim measures to avoid disrupting water supply to affected households. Investigate for proper corrective action.

Water Impact on surface water quality due to/ from: · Contaminants from materials used and construction activities and processes · Siltation from soil erosion, spoil disposal area, dewatering excavations, etc · Water quality Deterioration of water quality in Ipo Dam and Bigte river Tributary during construction

· Mitigating sedimentation Build diaphragm wall when building inlet structure

Not Applicable

In the construction of the inlet structure, diaphragm wall plan will be built. Design drawings submitted to MWSS. (Drawing Code: S-A-06-O-ST-SE-04-A; Sheet Contents: Variant Inlet Works, Intake Structures, Diaphragm wall – Plan, sections and setting out point)



33

Table 17. Summary of Environmental Monitoring Programs Implemented

EMP Requirement (list all mitigation

measures specified in the

EMP/CEMP/SEMP)

Compliance Attained

Location

Comment on Reasons for Partial or Non-Compliance

Required Action and Target Dates to Achieve Compliance

1. Water Quality Monitoring

Compliant Ipo and Bigte River

Parial Compliance. Activity still ongoing. Visual monitoring through photograph and Video documentation. Water quality sampling is conducted monthly for surface water and water treatment plant by CRL Laboratories. The parameters for the surface water are the following: Temperature, pH, electric conductivity, tubidity, color, TDS, ORP, dissolved oxygen, BOD, coliform (Total and Fecal) and heavy metals (See sampling location and results on the report). Water samples from Basin 2, the source of water supply for TBM, has also been collected and analyzed last December 2017 with the following parameters: temperature, TSS, electric conductivity, turbidity, color and TDS.

Schedule of surface water quality monitoring:

• July 10 , 2018 • August 23, 2018 • Sept 20, 2018 • November 6-8, 2018 • December 4, 2018

Schedule of effluent monitoring:

• July 10 , 2018 • August 7-9, 2018 • September 11, 2018 • October 9, 2018 • November 6-8, 2018 • December 4, 2018

2. Air quality monitoring

Compliant Ambient air quality monitoring is conducted quarterly by CRL Laboratories.

A sound level meter was procured by CMC to monitor the noise level during construction period as one of the requirements of ADB and DENR. Noise monitoring started on 28 October 2017.

Schedule of Air Quality Monitoring:

• September 25-28, 2018 • November 19-21, 2018



34

EMP Requirement (list all mitigation

measures specified in the

EMP/CEMP/SEMP)

Compliance Attained

Location

Comment on Reasons for Partial or Non-Compliance

Required Action and Target Dates to Achieve Compliance

3. Freshwater ecology monitoring

Compliant Freshwater ecology monitoring is done during wet and dry seasons.

• June 10-15, 2018 • September 20-23, 2018

5. Social and environmental awareness

Partial Residences near construction area and tunnel ROW

Bulletin boards for IEC purpose were installed in the barangay halls of Brgys. Bigte and San Mateo on June 19-20, 2017. FPIC process is in progress. MMT was already formed. CMC is funding MMT meetings. MMT meetings held: - Sept. 13, 2018 - Nov. 13, 2018 - provisional date of next meeting is Feb. 12, 2019

IEC is a continuous activity by updating the project bulletin boards installed in Brgys. Bigte and San Mateo Barangay Halls; Ipo Elementary School.

6. Public Health and safety

Compliant Health and safety staff are hired. Detailed grievance procedure was formulated in July 2017.

Applicable measures implemented.



35

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.



36

Table 18. Water Quality of WTP effluent (July to December 2018

Parameter (Class B DAO 2016-

08, Effluent

Standards)

Reference Unit July 18, 2018

August 23, 2018

September 20, 2018

October 16, 2018

November 6, 2018

December 18, 2018

Physical Characteristics

Temp (°C change)9 3 DAO 2016-08 °C 0.9 4.8 3.2 0.2 1.1 0.3 TSS 85 DAO 2016-08 mg/L 9 12 71 9 16 11

Color 100 DAO 2016-08 TCU 5 5 8

5 5 5

pH 6.0-9.0 DAO 2016-08 7.2 8.2 9.2 7.3 8.3 7.3

Inorganic and nonmetallic constituents

Nitrogen (as NO ¯) 14 DAO 2016-08 mg/L 0.2 0.4 0.9 0.4 0.1 <0.02

organic and biological

constituents

Ammonia 0.5 DAO 2016-08 mg/L 0.2 0.3 0.2 0.8 0.2 <0.003 Oil and Grease 5 DAO 2016-08 mg/L 0.7 1.5 1.0 0.5 0.7 0.7

Elements

Arsenic (As) 0.02 DAO 2016-08 mg/L <0.008 <0.008 <0.008 <0.008 <0.008 <0.008

Cadmium (Cd) 0.006 DAO 2016-08 mg/L <0.001 <0.001 <0.001 <0.001 <0.001 <0.001

Chromium Hexavalent

0.02 DAO 2016-08 mg/L <0.005 <0.005 <0.005 <0.005 <0.005 <0.005

Dissolved Copper (Cu)

0.04 DAO 2016-08 mg/L <0.003 <0.003 <0.003 <0.003 <0.003 <0.003

9 General Effluent Standard values for temperature is the temperature difference of the background value and discharge point.



37

Parameter (Class B DAO 2016-

08, Effluent

Standards)

Reference Unit July 18, 2018

August 23, 2018

September 20, 2018

October 16, 2018

November 6, 2018

December 18, 2018

Lead (Pb) 0.02 DAO 2016-08 mg/L <0.005 <0.005 <0.0005 <0.005 <0.005 <0.005

Manganese (Mn) 2 DAO 2016-08 mg/L 0.03 0.06 0.0006 <0.003 <0.003 0.01

Mercury (Hg) 0.002 DAO 2016-08 mg/L - <0.00002 <0.00002 <0.0002 <0.0002 <0.0002

Nickel (Ni) 0.2 DAO 2016-08 mg/L <0.003 <0.003 <0.003 <0.003 <0.003 <0.003

Zinc (Zn) 4 DAO 2016-08 mg/L 0.02 0.009 0.007 <0.005 0.005 <0.005

BTEX

Benzene 0.1 DAO 2016-08 mg/L ND ND - - - ND

Toluene 5 DAO 2016-08 mg/L ND ND - - - ND

Ethyl Benzene 1.5 DAO 2016-08 mg/L ND ND - - - ND

m/p-Xylene 5 DAO 2016-08 mg/L ND ND - - - ND

o-Xylene 5 DAO 2016-08 mg/L ND ND - - -

TPH

TPH as GRO (Gasoline Range Organics, C6-C10

100 DAO 2016-08 mg/L ND ND ND ND ND ND

TPH C10-C14 100 DAO 2016 mg/L - - - ND ND -

TPH C15-C28 100 DAO 2016 mg/L - - - ND ND - TPH C29-36 100 DAO 2016 mg/L - - - - - -

ND = not detected or below the method detection limit of the analysis/test



38

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.



39

Figure 4. The sampling locations (Bigte and Ipo Rivers)



40

Figure 5. Sampling points in Bigte River



41

Figure 6. Sampling points in Ipo River



42

Water Quality Results for Bigte River (July to December 2018)

Table 19. Bigte Creek Water Quality Sampling sites

Code /

General

Location

Photo Sampling Date/

remarks

SWB1

(SW1 in EIA

Nov 2016)

Bigte Creek

near the outlet.

Bigte Creek

near the basin

2 in Bigte

Portal.

N14° 51.538’

E121° 05.453’

2018 July 11

2018 August 23

2018 Sept20

2018 Oct 9

2018 Nov 6

2018 Dec 18

SWB2

(SW3 in EIA

Nov 2016)

Bigte Creek,

within the

Salonga

Property. The

site near Sitio

Settling

N14° 51.526

E121° 05.330’

2018 July 11

2018 August 23

2018 Sept20

2018 Oct 9

2018 Nov 6

2018 Dec 18



43

Code /

General

Location


remarks

SWB2 A

Bigte Creek,

within the

Salonga

Property. The

site near

culvert at Sitio

Settling

2018 July 11

2018 August 23

2018 Sept 20

2018 Oct 9

2018 Nov 6

2018 Dec 18

SWB3

Bigte Creek.

Sampling site is

near the

Minuyan bridge

N14° 51.404’

E121° 05.193

2018 July 11

2018 Aug 23

2018 Sept 20

2018 Oct 9

2018 Nov 6

2018 Dec 18



44

Code /

General

Location


remarks

SWSM1

(Sta.MARIA 03

in EIA

November

2016)

In Sta.Maria

River,

within the

vicinity of San

Jose Bridge

N14° 50.123’

E121° 04.47’1’

2018 July 11

2018 August 23

2018 Sept20

2018 Oct 9

2018 Nov 6

2018 Dec 18



45

Table 20. Water Quality Results for SWB1 Parameter Adopted

Criteria (Class B

DAO 2016-08)

Reference SW BIGTE1/SWB1 Bigte Creek near the basin 2 in Bigte Portal. This site is near the outlet.

N14° 51.538’ E121° 05.453’

Year/ quarter 2013 WET

(May to October)

2014 DRY (Novemb

er to April)

July 11, 2018

Aug. 23,

2018

Sept. 20, 2018

Nov. 6, 2018


Temp (°C) 26-30 DAO 2016-08 27.4 27.5 28 27.3 27.4 25

Salinity (%) b - parameter not included in DAO 90-34

14.62 13.91 8.2 8.1 8.2 9.0

TSS 65 DAO 2016-08 130.5 130.5 - - - 314

Electric Cond. (mS/cm) b

- parameter not included in DAO 2016-08

228.5 217.3 223 246 270 8

Turbidity (NTU) b 20 EP (Water Quality) Policy 2003, ANZECC

5.66 5.26 40 17 9.4 15

Colour (Apparent, PCU)

50 DAO 2016-08, class B 15 15 60 20 20 183

TDS - parameter not included inDAO 2016-08

146.9 12 133 144 155 8

pH 6.50-8.50 DAO 2016-08 8.7 7.93 8.1 8.3 8.2




46

Parameter Adopted Criteria (Class B

DAO 2016-08)


N14° 51.538’ E121° 05.453’

Total Nitrogen

DAO 2016-08 - - 5.7 5.4 8.4 1.9

Nitrogen (as NO ¯) a 7 DAO 2016-08 0.1 0.02 0.4 0.1 0.5 0.6

Oxidation Reduction Potential ORP (mV)


195 217.2 520 360 269 332

Phosphorus (as PO ³¯) 0.5 DAO 2016-08 0.03 0.4 0.1 0.1 0.2 0.2

organic and biological constituents

Dissolved Oxygen 5 (minimum)

DAO 2016-08 14.4 4.21 9 8 8 9

BOD5 5 DAO 2016-08 1 1 1 1 1 2

COD b - parameter not included in DAO 2016-08

20 9.8 11 5 12 14

Faecal Coliform (MPN/100mL) b

100 DAO 2016-08 54,000 1,700

4600 24000 3500 790

Total Coliform (MPN/100mL)


92,000 16,000

35000 24000 3500 3,500

Oil and Grease 1 DAO 2016-08 0.5 0.4 0.8 0.9 0.56 0.8

Elements

Antimony (Sb) - parameter not included in

DAO 2016-08 <0.001 <0.001 <0.008 <0.008 <0.008 <0.008



47


DAO 2016-08)


N14° 51.538’ E121° 05.453’

Arsenic (As) 0.01 DAO 2016-08 <0.01 <0.01 <0.01 <0.01 <0.01 <0.008

Cadmium (Cd) 0.003 DAO 2016-08 <0.006 <0.006 <0.003 <0.003 <0.003 <0.001

Chromium (hexavalent, Cr(VI))

0.01 DAO 2016-08 <0.003 <0.003 - - - -

Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 <0.01 <0.02 <0.02 <0.003

Lead (Pb) 0.01 DAO 2016-08 <0.04 <0.05 - <0.005 <0.005 <0.005

Manganese (Mn) 0.2 DAO 2016-08 0.01 0.1 - - - -

Mercury (Hg) 0.001 DAO 2016-08 <0.0001 <0.0001 <0.0002 <0.0002 <0.0002 <0.0002

Nickel (Ni) 0.04 DAO 2016-08 <0.03 <0.03 <0.03 <0.03 <0.03 <0.003

Vanadium (V) - parameter not included in DAO 2016-08

<1.0 <1.0 0.01 0.01 0.01 0.01

Zinc (Zn) 2 DAO 2016-08 <0.02 <0.02 - 0.01 0.006 0.008



48


Criteria (Class B

DAO 2016-08)

Reference SW03/SWB2 Bigte Creek, within the Salonga Property. The site near Sitio Settling

N14° 51.526 E121° 05.330’

Year/ quarter 2013 WET (May to October)

2014 DRY (November to April)

July 11, 2018

Aug. 23, 2018

Sept. 20, 2018

Nov. 6, 2018


Temp (°C) 26-30 DAO 2016-08 27 27.10 32.2 27.1 26.5 -


14.06 12.16 9.0 8.1 4.9 -

TSS 65 DAO 2016-08 - 12 - - - -



219.7 190.0 222 233 220 -


12.8 24.10 45 17 20 -


50 DAO 2016-08, class B 20 10 60 20 15 -


141.1 120.40 133 138 122 -

pH 6.50-8.50 DAO 2016-08 8.33 8.12 7.7 8.3 8 -




49


DAO 2016-08)


N14° 51.526 E121° 05.330’

Total Nitrogen

DAO 2016-08 -

5.7 2.7 8.7 -

Nitrogen (as NO ¯) a 7 DAO 2016-08 0.02 0.02 0.4 0.08 0.8 -



82.00 82 525 378 287 -

Phosphorus (as PO ³¯) 0.5 DAO 2016-08 0.01 0.01 0.1 0.1 0.1 -


Dissolved Oxygen 5 (minimum) DAO 2016-08 22.5 8.18 7 8 7 -

BOD5 5 DAO 2016-08 1 1 1 1 1 -


9.8 9.8 9.5 16 11 -


100 DAO 2016-08 9,200 1,700

4,600

24,000

2,400

-



92,000 16,000

35,000

24,000

2,400

-

Oil and Grease 1 DAO 2016-08 0.3 0.4 1.1 0.8 <0.41 -

Elements



50


DAO 2016-08)


N14° 51.526 E121° 05.330’

Antimony (Sb) - parameter not included in DAO 2016-08

<0.001 <0.001 0.008 0.008 0.008 -

Arsenic (As) 0.01 DAO 2016-08 <0.01 <0.01 <0.01 <0.01 <0.01 -

Cadmium (Cd) 0.003 DAO 2016-08 <0.006 <0.006 <0.003 <0.003 <0.003 -


0.01 DAO 2016-08 <0.003 <0.003 - - - -

Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 <0.01 <0.02 <0.02 -

Lead (Pb) 0.01 DAO 2016-08 <0.05 <0.05 - <0.005 <0.005 -

Manganese (Mn) 0.2 DAO 2016-08 0.07 0.2 - - - -

Mercury (Hg) 0.001 DAO 2016-08 <0.0001 <0.0001 <0.0002 <0.0002 <0.0002 -

Nickel (Ni) 0.04 DAO 2016-08 <0.03 <0.03 0.08 <0.03 <0.03 -


<1.0 <1.0 0.01 0.01 0.01 -

Zinc (Zn) 2 DAO 2016-08 <0.02 <0.02 0.01 0.01 -



51

Table 22. Water Quality Results for SWB2A Parameter Adopted

Criteria (Class B

DAO 2016-08)

Reference SWB2A Water Quality of Bigte Creek in the section drains out from construction

site


(May to October)

2014 DRY (Novemb

er to April)

July 11, 2018

Aug. 23,

2018

Sept. 20, 2018

Nov. 6, 2018


Temp (°C) 26-30 DAO 2016-08 - 27.10 27.5 26.6 27.4 24.3


- 12.16 5.8 5.7 8.2 4.9

TSS 65 DAO 2016-08 - 12 - - - -



- 190.0 205 216 270 180


- 24.10 23 30 9.4 16


50 DAO 2016-08, class B - 10 25 20 20 10


- 120.40 120 124 155 104

pH 6.50-8.50 DAO 2016-08 - 8.12 7.8 8 8.2 8




52


DAO 2016-08)


site

Total Nitrogen

DAO 2016-08

5.8 2.6 8.4 5.5

Nitrogen (as NO ¯) a 7 DAO 2016-08 - 0.02 0.5 <0.02 0.5 0.2



- 82 547 496 269 344

Phosphorus (as PO ³¯) 0.5 DAO 2016-08 - 0.01 0.08 0.1 0.2 0.05



DAO 2016-08 - 8.18 8 8 8 9

BOD5 5 DAO 2016-08 - 1 1 1 1 2


- 9.8 16 9.8 12 15


100 DAO 2016-08 - 1,700 2400 4300 3500 5400



- 16,000 5400 24000 3500 16000

Oil and Grease 1 DAO 2016-08 - 0.4 0.9 0.6 0.56 0.9

Elements


- <0.001 <0.008 <0.008 <0.008 <0.008



53


DAO 2016-08)


site

Arsenic (As) 0.01 DAO 2016-08 - <0.01 <0.01 <0.01 <0.01 <0.008

Cadmium (Cd) 0.003 DAO 2016-08 - <0.006 <0.003 <0.003 <0.003 <0.001


0.01 DAO 2016-08 - <0.003 - - - -

Copper (Cu) 0.02 DAO 2016-08 - <0.02 <0.01 <0.02 <0.02 <0.003

Lead (Pb) 0.01 DAO 2016-08 - <0.05 - <0.005 <0.005 <0.005

Manganese (Mn) 0.2 DAO 2016-08 - 0.2 - - - -

Mercury (Hg) 0.001 DAO 2016-08 - <0.0001 <0.0002 <0.0002 <0.0002 <0.0002

Nickel (Ni) 0.04 DAO 2016-08 - <0.03 <0.03 <0.03 <0.03 <0.003


- <1.0 0.1 0.01 0.01 0.008

Zinc (Zn) 2 DAO 2016-08 - <0.02 0.4 0.02 0.006 0.01



54


Criteria (Class B

DAO 2016-08)

Reference SWB3 Baltazar bridge. This is the bridge pass the Barangay Bigte Hall

N14° 51.272’ E121° 05.144’


(May to October)

2014 DRY (November to April)

July 11, 2018

Aug. 23,

2018

Sept. 20, 2018

Nov. 6, 2018


Temp (°C) 26-30 DAO 2016-08

28.20 -

28.4 - 26.5 25.4

Salinity (%) b - parameter not included in DAO 90-34 - -

11 - 9 9

TSS 65 DAO 2016-08

- -

- - - -


- parameter not included in DAO 2016-08 376.00 -

419 - 420 225

Turbidity (NTU) b 20 EP (Water Quality) Policy 2003, ANZECC 25.40 -

55 - 11 50


50 DAO 2016-08, class B

-

25 - 15 10

TDS - parameter not included inDAO 2016-08 244.80 -

254 - 263 130

pH 6.50-8.50 DAO 2016-08

7.94 -

7.8 - 8 8




55

Parameter Adopted Criteria

(Class B DAO

2016-08)


N14° 51.272’ E121° 05.144’

Total Nitrogen

DAO 2016-08

12 - 8.5 7.1

Nitrogen (as NO ¯) a 7 DAO 2016-08

- -

1.2 - 0.5 0.5


- parameter not included in DAO 2016-08 251.00 -

- 281 404 366

Phosphorus (as PO ³¯) 0.5 DAO 2016-08

- -

- 0.1 0.1 0.1



DAO 2016-08

- -

8 - 8 8

BOD5 5 DAO 2016-08

- -

1 - 1 1

COD b - parameter not included in DAO 2016-08 - -

7.5 - 13 15


100 DAO 2016-08

- -

16000 - 11000 1,700


- parameter not included in DAO 2016-08 - -

24000 - 11000 9,200

Oil and Grease 1 DAO 2016-08

- -

0.8 - 0.67 1.1

Elements

-

Antimony (Sb) - parameter not included in DAO 2016-08 - -

<0.008 - <0.008 <0.008



56


(Class B DAO

2016-08)


N14° 51.272’ E121° 05.144’

Arsenic (As) 0.01 DAO 2016-08

- -

<0.01 - <0.01 <0.008

Cadmium (Cd) 0.003 DAO 2016-08

- -

<0.003 - <0.003 <0.001


0.01 DAO 2016-08

- -

- - - -

Copper (Cu) 0.02 DAO 2016-08

- -

<0.01 - <0.02 <0.003

Lead (Pb) 0.01 DAO 2016-08

- -

- - <0.005 <0.005

Manganese (Mn) 0.2 DAO 2016-08

- -

- - - -

Mercury (Hg) 0.001 DAO 2016-08

- -

<0.0002 - <0.0002 <0.0002

Nickel (Ni) 0.04 DAO 2016-08

- -

<0.03 - <0.03 <0.0003

Vanadium (V) - parameter not included in DAO 2016-08 - -

0.01 - 0.01 0.01

Zinc (Zn) 2 DAO 2016-08

- -

0.04 - 0.008 0.01



57

Table 24. Water Quality Results for SW3A Parameter Adopted

Criteria (Class B

DAO 2016-08)

Reference SWB3A Water Quality near Minuyan Bridge


(May to October)

2014 DRY (Novemb

er to April)

July 11, 2018

Aug. 23,

2018

Sept. 20, 2018

Nov. 6, 2018


Temp (°C) 26-30 DAO 2016-08 28.20 - 27.5 26.6 23.3 28.7


- - 5.8 5.7 6.5 8.1

TSS 65 DAO 2016-08 - - - - -



376.00 - 205 216 256 622


25.40 - 23 30 13 2.4


50 DAO 2016-08, class B - 25 20 15 8


244.80 - 120 124 149 376

pH 6.50-8.50 DAO 2016-08 7.94 - 7.8 8 8 7.5


Total Nitrogen

DAO 2016-08 - 5.8 2.6 8.7 4.5



58


DAO 2016-08)


Nitrogen (as NO ¯) a 7 DAO 2016-08 - - 0.5 <0.02 0.8 0.5



251.00 - 547 496 296 352

Phosphorus (as PO ³¯) 0.5 DAO 2016-08 - - 0.08 0.1 0.1 0.09


- -


DAO 2016-08 - - 8 8 7 7

BOD5 5 DAO 2016-08 - - 1 1 1 1


- - 16 9.8 6.9 17


100 DAO 2016-08 - - 2400 4300 5400 240,000



- - 5400 24000 5400 240,000

Oil and Grease 1 DAO 2016-08 - - 0.9 0.6 0.44 0.5

Elements


- - <0.008 <0.008 <0.008 0.008

Arsenic (As) 0.01 DAO 2016-08 - - <0.01 <0.01 <0.01 0.008

Cadmium (Cd) 0.003 DAO 2016-08 - - <0.003 <0.003 <0.003 <0.001



59


DAO 2016-08)



0.01 DAO 2016-08 - - - - - -

Copper (Cu) 0.02 DAO 2016-08 - - <0.01 <0.02 <0.02 <0.003

Lead (Pb) 0.01 DAO 2016-08 - - - <0.005 <0.005 <0.005

Manganese (Mn) 0.2 DAO 2016-08 - - - - - -

Mercury (Hg) 0.001 DAO 2016-08 - - <0.0002 <0.0002 <0.0002 <0.0002

Nickel (Ni) 0.04 DAO 2016-08 - - <0.03 <0.03 <0.03 <0.003


- 0.1 0.01 0.01 0.006

Zinc (Zn) 2 DAO 2016-08 - - 0.4 0.02 <0.005 <0.005



60

Table 25. Water Quality Results for SWSM1 Parameter Adopted

Criteria (Class B

DAO 2016-08)

Reference Sta.MARIA 03/SWSM1 In Sta.Maria River,

within the vicinity of San Jose Bridge N14° 50.123’ E121° 04.47’1’

Year/ quarter

2013 WET

(May to October)

2014 DRY (Novemb

er to April)

July 11, 2018

Aug. 23,

2018

Sept. 20, 2018

Nov. 6, 2018


Temp (°C) 26-30 DAO 2016-08 27.30 32.30 28.6 28 27.8 25.2


15.74 12 6.5 13 15

TSS 65 DAO 2016-08 657.00 32.00 - - - -



246.00 450.80 300 247 310 390


51.40 12.10 65 35 26 3.7


50 DAO 2016-08, class B 500.00 25 25 15 15


158.00 292.50 179 142 188 234

pH 6.50-8.50 DAO 2016-08 8.20 7.64

7.5 7.7 7.7 7.8


Total Nitrogen

DAO 2016-08 0.10 0.60

8.9 8.3 11 5.2



61

Nitrogen (as NO ¯) a 7 DAO 2016-08

0.9 0.2 0.6 1.1



187.00 156.00

547 493 286 313

Phosphorus (as PO ³¯) 0.5 DAO 2016-08 0.70 0.30

0.2 0.1 0.2 0.3



DAO 2016-08 not measured

2.07

7 8 7 8

BOD5 5 DAO 2016-08 14.00

1.00

3 4 4 2


49.00

49.00

15 9.3 21 18


100 DAO 2016-08 920,000.0

0

31,000.00

35,000

54,000

16,000 54,000



920,000.0

0

31,000.00

54,000

54,000

16,000 54,000

Oil and Grease 1 DAO 2016-08 <0.3 0.70

0.7 1.1 0.44 0.4

Elements


<0.001 <0.001 <0.008 <0.008 <0.008 <0.008

Arsenic (As) 0.01 DAO 2016-08 <0.01 <0.01 <0.01 <0.01 <0.01 <0.008

Cadmium (Cd) 0.003 DAO 2016-08 <0.006 <0.006 <0.003 <0.003 <0.003 <0.001


0.01 DAO 2016-08 <0.003 <0.003 - - - -

Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 <0.01 <0.02 <0.02 <0.003



62

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


<1.0 <1.0 0.01 0.01 0.01 0.01

Zinc (Zn) 2 DAO 2016-08 0.10 <0.02 - 0.02 0.007 0.05



63

Table 26. Water Quality Results for SW2B Parameter Adopted

Criteria Unit Reference Wet

(May to October 2013)

Aug 23, 2018


Temp 26-30 °C DAO 2016-08, class B;

32.3 27.3

Salinity - % parameter not included in DAO 2016-08

8.1

TSS 65 mg/L DAO 2016-08, class B

32 -

Electric Conductivity (EC)

- µS/cm parameter not included in DAO 2016-08;

450.8 384

Turbidity 20 NTU EP (Water Quality) Policy 2003, ANZECC

12.1 17

Colour 50 TCU parameter not included in DAO 2016-08

15

TDS - mg/L parameter not included in DAO 2016-08

292.5 225

pH 6.50-8.50 DAO 2016-08, class B

7.64 7.8


Total Nitrogen - mg/L parameter not included in DAO 2016-08

- 5.3

Nitrogen (as NO ¯) a

7 mg/L DAO 2016-08, class B

0.6 0.08

Oxidation- Reduction Potential (ORP)

- mV parameter not included in DAO 2016-08

156 524

Phosphorus (as PO ³¯)

0.5 mg/L DAO 2016-08, class B

0.3 0.1


Dissolved Oxygen


2.07 7

BOD5 5 mg/L DAO 2016-08, class B

1 1

COD b - mg/L parameter not included in DAO 2016-08

49 5.8

Faecal Coliform 100 MPN/100mL

DAO 2016-08, class B

31000 16,000



64


Unit Reference Wet (May to October 2013)

Aug 23, 2018

Total Coliform - MPN/100mL

parameter not included in DAO 2016-08

31000 16,000

Oil and Grease 1 mg/L DAO 2016-08, class B

0.7 3

Elements

Antimony (Sb) - mg/L parameter not included in DAO 2016-08

<0.001 <0.0008

Arsenic (As) 0.01 mg/L DAO 2016-08 <0.01 <0.01

Cadmium (Cd) 0.003 mg/L DAO 2016-08 <0.006 <0.003


0.01 mg/L DAO 2016-08 <0.003 -

Copper (Cu) 0.02 mg/L DAO 2016-08 <0.02 <0.02

Lead (Pb) 0.01 mg/L DAO 2016-08 <0.04 <0.005

Manganese (Mn)

0.2 mg/L DAO 2016-08 0.5 -

Mercury (Hg) 0.001 mg/L DAO 2016-08 <0.0001 <0.0002

Nickel (Ni) 0.04 mg/L DAO 2016-08 <0.01 <0.03

Vanadium (V) 0.075 mg/L WHO <1.0 0.01

Zinc (Zn) 2 mg/L DAO 2016-08 <0.02 0.01

Water Quality Results for Ipo River (July to December 2018)

The location of sampling stations for Ipo River within the period of July to December 2018 are shown in Table 27.



65

Table 27. Water Quality Sampling sites along Angat/ Ipo River

Code/ General Location

Photos Remarks

SW IPO 1

(IPO US2 in EIA Nov 2016)

Sapang Anginan and Angat River confluence

N 14 53 26.09

E 121 9 59.59

Water quality sampling was done

on 6 Nov 2018

SW IPO 2

(IPO 4 in EIA Nov 2016)

Near confluence of Sapang Munti

and Angat River

N14° 52’ 22.3”

E121° 10’ 05.6”


on 6 Nov 2018



66

SW IPO3 (IPO2 in EIA Nov 2016)

Between the old Ipo Dam structure and

intakes of existing tunnels

1,2,3

N14° 52’ 26.9”

E121° 10’ 56.5


on 6 Nov 2018



67

SW IPO4

(IPO DS2 in EIA Nov 2016)

~ 350m downstream of

Ipo Dam

N14° 52’ 36.8” E121° 10’ 42.3”


on 6 Nov 2018



68

Tables 28 to 32 indicated the results of Angat River water quality monitoring for July to December 2018 while the laboratory analysis is shown in Appendix 8.4.

Table 28. Water Quality Results for SW IPO1 Parameter Adopted

Criteria (Class B

DAO 2016-08)

Reference IPO SW1/

IPO US2 in EIA 2016 confluence of Sapang Anginan and Angat River


(May to October)

2014 DRY (Novemb

er to April)

July 11, 2018

Aug. 23,

2018

Sept. 20, 2018

Nov. 6, 2018


Temp (°C) 26-30 DAO 2016-08 28.6 30.2 - - 23.2 22.4

Salinity (%) - parameter not included in DAO 90-34

9.97 9.96 - - 4.9 3.3

TSS 65 DAO 2016-08 4 7.0 - - - -

Electric Cond. (mS/cm) - parameter not included in DAO 2016-08

155.8 155.6 - - 142 143

Turbidity (NTU) 20 EP (Water Quality) Policy 2003, ANZECC

4.61 4.9 - - 23 3.7


50 DAO 2016-08, class B 10 5 - - 10 8


100.30 92.71 - - 81 83

pH 6.50-8.50 DAO 2016-08 8.93 7.92 - - 7.9 7.5



69


DAO 2016-08)

Reference IPO SW1/



Total Nitrogen

DAO 2016-08 95.26 - - - 10 288

Nitrogen (as NO ¯) 7 DAO 2016-08 - <0.02 - - 1.0 6.9



<0.02 219 - - 320 0.3

Phosphorus (as PO ³¯) 0.5 DAO 2016-08 <0.006 <0.006 - - 0.04 0.01



DAO 2016-08 8.89 8.90 - - 9 9

BOD5 5 DAO 2016-08 1 1 - - <1 1

COD - parameter not included in DAO 2016-08

15 9.9 - - 6.4 17

Faecal Coliform (MPN/100mL)

100 DAO 2016-08 13 17

- - 94 45



49 110

- - 920 1300

Oil and Grease 1 DAO 2016-08 15 0.04 - 0.55 0.5



70


DAO 2016-08)

Reference IPO SW1/


Elements

-


<0.001 <0.001 - - <0.008 <0.008

Arsenic (As) 0.01 DAO 2016-08 <0.01 <0.01 - - <0.01 <0.008

Cadmium (Cd) 0.003 DAO 2016-08 <0.006 <0.006 - - <0.003 <0.001


0.01 DAO 2016-08 - <0.003 - - -

Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 - - <0.02 <0.003

Lead (Pb) 0.01 DAO 2016-08 <0.05 <0.05 - - <0.005 <0.005

Manganese (Mn) 0.2 DAO 2016-08 0.06 <0.0001 - - - -

Mercury (Hg) 0.001 DAO 2016-08 <0.0001 0.05 - - <0.0002 <0.0002

Nickel (Ni) 0.04 DAO 2016-08 <0.03 <0.0001 - - <0.03 <0.003


<1.0 <0.03 - - 0.008 0.006

Zinc (Zn) 2 DAO 2016-08 <0.02 <1.0 - - 0.009 0.006



71


Criteria (Class B

DAO 2016-08)

Reference IPO 2/

IPO 4 in EIA Nov 2016) Near confluence of Sapang Munti and Angat River

N14° 52’ 22.3” E121° 10’ 05.6


(May to October)

2014 DRY (Novemb

er to April)

July 11, 2018

Aug. 23,

2018

Sept. 20, 2018

Nov. 6, 2018


Temp (°C) 26-30 DAO 2016-08 30.2 28.6 28.3 26.3 25.5 26.6


9.96 9.97 4.1 3.2 6.5 3.3

TSS 65 DAO 2016-08

4 - - - -


7.0 155.8 153 145 162 170


155.6 4.61 2.9 37 30 3.4


50 DAO 2016-08, class B 4.9 10 8 20 10 8


5 100.30 90 82 91 99

pH 6.50-8.50 DAO 2016-08 92.71 8.93 7.4 7.8 7.6 7.4


7.92



72


DAO 2016-08)

Reference IPO 2/


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



95.26 370 371 306 316

Phosphorus (as PO ³¯) 0.5 DAO 2016-08 <0.02

0.2 0.04 0.04 <0.01



DAO 2016-08 8.89 9 8

BOD5 5 DAO 2016-08 8.90 1 2 1 1 1


1 15 12 5.4 8.4 12


100 DAO 2016-08 9.9 13 78 3500 3500 170



17

49 230 9200 3500 2400

Oil and Grease 1 DAO 2016-08 110

15 0.9 0.6 <0.471 0.7

Elements



73


DAO 2016-08)

Reference IPO 2/


N14° 52’ 22.3” E121° 10’ 05.6


0.04 <0.001 <0.008 <0.008 <0.008 <0.008

Arsenic (As) 0.01 DAO 2016-08 <0.001 <0.01 <0.01 <0.01 <0.01 <0.008

Cadmium (Cd) 0.003 DAO 2016-08 <0.01 <0.006 <0.003 <0.003 <0.003 <0.001


0.01 DAO 2016-08 <0.006 <0.003 - - -

Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 <0.01 <0.02 <0.02 <0.003

Lead (Pb) 0.01 DAO 2016-08 <0.05 <0.05 - <0.005 <0.005 <0.003

Manganese (Mn) 0.2 DAO 2016-08 <0.0001 0.06 - - - -

Mercury (Hg) 0.001 DAO 2016-08 0.05 <0.0001 <0.0002 <0.0002 <0.0002 <0.0002

Nickel (Ni) 0.04 DAO 2016-08 <0.0001 <0.03 <0.03 <0.03 <0.03 <0.003


<0.03 <1.0 <0.005 0.01 0.008 0.007

Zinc (Zn) 2 DAO 2016-08 <1.0 - 0.03 0.02 0.009 <0.005

Bromide

DAO 2016-08 2.60

- - - -



74


Criteria (Class B

DAO 2016-08)

Reference SW IPO 3 (IPO2 in EIA Nov 2016)

Between the old Ipo Dam structure and intakes of existing tunnels 1,2,3 N14° 52’ 26.9” E121° 10’ 56.5

Year/ quarter

2013 WET

(May to October)

2014 DRY (Novemb

er to April)

July 11, 2018

Aug. 23,

2018

Sept. 20, 2018

Nov. 6, 2018


Temp (°C) 26-30 DAO 2016-08 28.5 28.5 28 26.4 21.8 18.6


10.00 10.00 3.3 3.2 4.1 3.3

TSS 65 DAO 2016-08 11 11 8 - - -


156.3 156.3 153 147 165 143


4.68 4.68 3 32 12 4.2


50 DAO 2016-08, class B 10.00 10.00 8 10 8 8


97.3 97.3 88 83 97 81

pH 6.50-8.50 DAO 2016-08 8.50 8.50 7.4 7.4 7.7 7.5



75


DAO 2016-08)




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



166 166 389 359 269 312

Phosphorus (as PO ³¯) 0.5 DAO 2016-08 <0.02 <0.02 0.02 0.04 0.03 0.02



DAO 2016-08 8.84 8.84 8 7 8 9

BOD5 5 DAO 2016-08 1 1 1 <1 1 2


15 15 7.6 3.9 6.4 12


100 DAO 2016-08 140

140 79 1700 2400 490



1,400

1,400 240 3500 2400 2400



76


DAO 2016-08)



Oil and Grease 1 DAO 2016-08 0.6 0.6 0.8 0.7 0.67 0.6

Elements


<0.001 <0.001 <0.008 <0.008 <0.008 <0.008

Arsenic (As) 0.01 DAO 2016-08 <0.01 <0.01 <0.01 <0.01 <0.01 <0.008

Cadmium (Cd) 0.003 DAO 2016-08 <0.006 <0.006 <0.003 <0.003 <0.003 <0.001


0.01 DAO 2016-08

<0.003 - - - -

Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 <0.01 <0.02 <0.02 <0.003

Lead (Pb) 0.01 DAO 2016-08 <0.05 <0.05 - 0.01 <0.005 <0.005

Manganese (Mn) 0.2 DAO 2016-08 0.05 0.05 - - - -

Mercury (Hg) 0.001 DAO 2016-08 <0.0001 <0.0001 <0.0002 <0.0002 <0.0002 <0.0002

Nickel (Ni) 0.04 DAO 2016-08 <0.01 <0.01 <0.03 <0.03 <0.03 <0.003



77


DAO 2016-08)




<1.0 <1.0 <0.005 0.008 0.008 0.005

Zinc (Zn) 2 DAO 2016-08 <0.02 <0.02 0.02 0.01 0.1 <0.005

Table 31. Water Quality Results for SW IPO4


DAO 2016-08)

Reference SW IPO4 ~ 350m downstream of Ipo Dam

N14° 52’ 36.8” E121° 10’ 42.3”

Year/ quarter

2013 WET

(May to October)

2014 DRY (Novemb

er to April)

July 11, 2018

Aug. 23,

2018

Sept. 20, 2018

Nov. 6, 2018


Temp (°C) 26-30 DAO 2016-08 31.96 31.96 27.1 25.6 25.3 20.3


9.83 9.83 4.1 3.2 4.9 5.7

TSS 65 DAO 2016-08 5 5 - - - -


153.6 153.6 146 147 159 143


4.02 4.02 19 34 13 5.6



78


DAO 2016-08)


N14° 52’ 36.8” E121° 10’ 42.3”


50 DAO 2016-08, class B 5 5 10 20 8 8


97 97 8.6 84 93 81

pH 6.50-8.50 DAO 2016-08 8.16 8.16 7.4 7.3 7.5 7.3


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



195 195 528 231 269 283

Phosphorus (as PO ³¯) 0.5 DAO 2016-08 <0.006 <0.006 0.03 0.5 0.03 0.01


Dissolved Oxygen 5 (minimum

)

DAO 2016-08 6.25 6.25 9 9 10

BOD5 5 DAO 2016-08 1 1 2 <1 1


9.8 9.8 14 17 13



79


DAO 2016-08)


N14° 52’ 36.8” E121° 10’ 42.3”


100 DAO 2016-08 70 70 49 280 330



540 540 130 3500 2400

Oil and Grease 1 DAO 2016-08 0.5 0.5 0.4 0.8 0.8

Elements


<0.001 <0.001 8 9 8 <0.008

Arsenic (As) 0.01 DAO 2016-08 <0.01 <0.01 1 1 1 <0.008

Cadmium (Cd) 0.003 DAO 2016-08 <0.006 <0.006 8.5 8.4 6.4 <0.001


0.01 DAO 2016-08 <0.003 <0.003 5400 2400 2400

Copper (Cu) 0.02 DAO 2016-08 <0.02 <0.02 9200 92200 2400 <0.003

Lead (Pb) 0.01 DAO 2016-08 <0.05 <0.05 0.7 0.9 <0.005

Manganese (Mn) 0.2 DAO 2016-08 0.03 0.03 -

Mercury (Hg) 0.001 DAO 2016-08 <0.0001 <0.0001 <0.008 <0.008 <0.008 <0.0002

Nickel (Ni) 0.04 DAO 2016-08 <0.01 <0.01 <0.01 <0.01 <0.01 <0.003



80


DAO 2016-08)


N14° 52’ 36.8” E121° 10’ 42.3”


<1.0 <1.0 <0.003 <0.003 <0.003 0.006

Zinc (Zn) 2 DAO 2016-08 <0.02 <0.02 - - - 0.007



81

Table 32. Water Quality in IPO5 Parameter Adopted

Criteria Unit Reference Sept 20, 2018



26


4.9


-



163


21


10

TDS - mg/L parameter not included inDAO 2016-08

97

pH 6.50-8.50


7.6



12

Nitrogen (as NO ¯) 7 mg/L DAO 2016-08, class B

1.2



311



0.03


Dissolved Oxygen 5 mg/L DAO 2016-08, class B

9


1

COD - mg/L parameter not included in DAO 2016-08

8.4

Faecal Coliform 100 MPN/100mL


35000

Total Coliform - - parameter not included in DAO 2016-08

35000



82


Unit Reference Sept 20, 2018


0.56

Elements


<0.008

Arsenic (As) 0.01 mg/L DAO 2016-08 <0.01

Cadmium (Cd) 0.003 mg/L DAO 2016-08 <0.003


0.01 mg/L DAO 2016-08 -

Copper (Cu) 0.02 mg/L DAO 2016-08 <0.02

Lead (Pb) 0.01 mg/L DAO 2016-08 <0.005

Manganese (Mn) 0.2 mg/L DAO 2016-08 -

Mercury (Hg) 0.001 mg/L DAO 2016-08 <0.0002

Nickel (Ni) 0.04 mg/L DAO 2016-08 <0.03

Vanadium (V) 0.075 mg/L WHO 0.007

Zinc (Zn) 2 mg/L DAO 2016-08 <0.005

Bromide Mg/L DAO 2016-08 -

Water quality in IDSSP

Water samples were also collected from inside and outside the silt curtain areas (Ipo Dam Slope Stabilization Project IDSSP- Ipo inside curtain and IDSSP- Ipo outside curtain) on August 28, 2018. The results were also compared to the Class B standards for fresh surface water similar to the sample taken from other sites along Angat River. Results are shown in Table 33.



83

Photo 1 IDSSP water sampling, 2018 August 28

Table 33. Water Quality in IDSSP (Inside and Outside Curtain) Parameter Adopted

Criteria Unit Reference IDSSP-IPO

INSIDE CURTAIN

IDSSP-IPO OUTSIDE CURTAIN



27.2 26.3


4.1 3.2


- -



168 146


27 36


15 8

TDS - mg/L parameter not included in DAO 2016-08

96 85

pH 6.50-8.50 DAO 2016-08, class B

10.0 7.8




84


Unit Reference IDSSP-IPO INSIDE

CURTAIN




587 571


2.7 0.03

Nitrogen (as NO ¯) a


0.1 0.1



0.01 0.03


Dissolved Oxygen


8 8


1 1

COD - mg/L parameter not included in DAO 2016-08

2.9 <1.82

Faecal Coliform

100 MPN/100mL DAO 2016-08, class B

54,000 1700

Total Coliform - - parameter not included in DAO 2016-08

160,000 3500


2.6 1.0

Elements


<0.008 <0.008

Arsenic (As) 0.01 mg/L DAO 2016-08, class B

<0.01 <0.01

Cadmium (Cd) 0.003 mg/L DAO 2016-08, class B

<0.003 <0.003



- -

Copper (Cu) 0.02 mg/L DAO 2016-08, class B

<0.02 <0.02

Lead (Pb) 0.01 mg/L DAO 2016-08, class B

<0.005 <0.005

Manganese (Mn)


- -



85


Unit Reference IDSSP-IPO INSIDE

CURTAIN


Mercury (Hg) 0.001 mg/L DAO 2016-08, class B

<0.0002 <0.0002

Nickel (Ni) 0.04 mg/L DAO 2016-08, class B

<0.03 <0.03

Vanadium (V) 0.075 mg/L WHO 0.008 0.007 Zinc (Zn) 2 mg/L DAO 2016-

08, class B 0.008 0.01

Assessment12 of Bigte River, Ipo River and IDSSP (July to December 2018)

The in situ and laboratory results confirmed that the water quality along Angat River is within the Class B standards for fresh surface water. It is noted that exceedances on baseline data were observed in temperature, pH, feacal coliform and mercury. Colder water temperature is noted result in 2018 Nov sampling activity. Elevated fecal coliform was reported at the Ipo Dam site and downstream of Ipo Dam during the conduct of baseline data gathering. It is noted that communities beside the riverbanks of Angat River and its tributaries have poor sanitation practices. This may have contributed to elevated fecal coliform. All heavy metal parameters, on the other hand, are mostly below detection limit.

It should be noted that CMC provided sanitation facilities such as portalets in all construction sites. These are all properly and regularly collected and maintained.

For IDSSP, elevated fecal and total coliform are reported on both sampling locations (inside and outside silt curtains). Moreover, turbidity and pH exceeded the DENR standards for IDSSP – inside curtain. Turbidity is expected to increase since silts are trapped on the silt curtains. During wet season, the turbidity of the river water outside the silt curtain is higher than the river water contained by the silt curtain. The pH and coliform results show higher measure inside the silt curtain compared to the results of samples taken from outside the

12 Ambient environmental conditions should be compared to the relevant ambient standards and/or performance indicators noted in the EMP.

Any exceedances should be highlighted for attention and follow-up. In addition, ambient environmental conditions could be compared to the baseline conditions (if baseline data is available) and described in qualitative terms or be evaluated based on a ranking system, such as the following:

1. Very Good (overall conditions are generally improved) 2. Good (conditions are maintained or slightly improved) 3. Fair (conditions are unchanged) 4. Poor (conditions are moderately degraded) 5. Very Poor (conditions are significantly degraded)

Additional explanatory comments should be provided as necessary.



86

silt curtain. The alkaline nature of water within the silt curtain may be due to a high salt contents particularly dissolved salts (sodium, calcium, magnesium carbonates and bicarbonates) which may be present in the soil that have eroded during the wet season. Since water column is protected by silt curtain, it is not as freely flowing and mineral often form column of mineral deposits which causes pH to increase.

Air and Noise Quality Monitoring Program

Summary of Air Quality Monitoring

Ambient air quality sampling was conducted on 25-28 September 2018 and 19-21 November 2018. A 24-hour sampling was conducted in three (3) sampling sites: Ipo Dam Site, Brgy. San Mateo, and MWSS Bigte Area. Below are the map and photos of sampling sites for the air quality monitoring (Fig. 7).

Code/ General

Location

Photos

Ipo Dam Site



87

Brgy. Hall of San Mateo

MWSS Bigte Area



88

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.



89

Table 34. Results of Ambient Air Quality Monitoring, September 2018

Parameter Sampling method Test

method

DENR

standards

(NAAQGV)

Reporting

limits Units

AT4- A1 AT4- A2 AT4

A3 AT4- A1 AT4- A2 AT4 A3

Near

MWSS

Bigte

property

San

Mateo

Barangay

Hall

Ipo

Dam

site

Near

MWSS

Bigte

property

San

Mateo

Barangay

Hall

Ipo Dam

site

WET

(30-31

Jul

2013)

WET

(31 Jul-1

Aug

2013)

WET

(1-2

Aug

2013)

WET

25-28

Sept

2018)

WET

25-28

Sept

2018)

WET

25-28

Sept

2018)

Wet Season Baseline

TSP Filtration method by high-

volume sampler Flame AAS

230 0.1 µg/Ncm 119.87 33.9 35.4 439 134.5 50.2

SO2 Absorption in liquids for

gaseous pollutants - Kimoto Brand (sampler)

Flame AAS

180 0.4 µg/Ncm 15.26 15.26 13.9 2.0 ND ND

NO2 Absorption in liquids for

gaseous pollutants - Kimoto Brand (sampler)

Flame AAS

150 0.4 µg/Ncm 3.57 3.42 6.56 7.0 6.3 4.7

PM10 Filtration method by high-

volume sampler Flame AAS

150 20 µg/Ncm 71.09 30 33.19 160.9 62.0 27.8



90

Table 35. Ambient Air quality, November 2018

Parameter Sampling method Test

method

DENR

standards

(NAAQGV)

Reporting

limits Units

AT4- A1 AT4- A2 AT4

A3 AT4- A1 AT4- A2 AT4 A3

Near

MWSS

Bigte

property

San

Mateo

Barangay

Hall

Ipo

Dam

site

Near

MWSS

Bigte

property

San

Mateo

Barangay

Hall

Ipo

Dam

site

DRY

(2-3

June

2014)

DRY

(4-5 June

2014)

DRY

(3-4

June

2014)

DRY

(19-21

Nov

2018)

DRY

(19-21

Nov

2018)

DRY

(19-21

Nov

2018)

Dry season Baseline

TSP Filtration method by high-

volume sampler

Flame

AAS 230 0.1 µg/Ncm 56.91 48.17 17.65 82.8 87.2 22.7

SO2

Absorption in liquids for

gaseous pollutants -

Kimoto Brand (sampler)

Flame

AAS 180 0.4 µg/Ncm 2.88 3.06 2.16 1.7 ND ND

NO2

Absorption in liquids for

gaseous pollutants -

Kimoto Brand (sampler)

Flame

AAS 150 0.4 µg/Ncm 4.14 4.56 3.06 7.4 7.4 1.2

PM10 Filtration method by high-

volume sampler

Flame

AAS 150 20 µg/Ncm 117.44 107.68 45.26 50.5 56.0 14.1



91

Assesment3 for Air Quality Monitoring

For September 2018 sampling, all stations passed the DENR standard for all parameters except for total suspended particulate matter (TSP) and particulate matter at 10 microns (PM10) at the MWSS Bigte station. The TSP and PM10 values, which exceeded the DENR Standard, may have been also influenced by the dusts coming from the cement plant operation. Also, occasional passing vehicles, wind propagation and ongoing construction within vicinity were observed at the station during the sampling.

Meanwhile, all stations also passed the DENR standard for all parameters in November 2018 sampling.

Summary of Noise Quality Monitoring (July to December 2018)

A noise level monitoring was conducted by CRL Laboratories in September and November 2018. The noise levels were recorded in decibels (dB). The results are compared with the DENR Ambient Noise Quality Standards Sec 78 Chapter IV, Article 1 of National Pollution Control Commission (NPCC) Rules and Regulations, 1978 standard limits for Class A category and WHO guidelines.

Maximum Allowable Noise Levels in General Areas, NPCC

Category of Area

Morning 5:00am to

9:00am

Daytime 9:00am- 6:00pm

Evening 6:00pm- 10:00pm

Night Time 10:00pm –

5:00am AA 45dB 50dB 45dB 40dB A 50dB 55dB 50dB 45dB B 60dB 65dB 60dB 55dB C 65dB 70dB 65dB 60dB D 70dB 75dB 70dB 65Db

Legend:

AA A section or contiguous area which requires quietness such as area within 100 meters from school sites, nursery schools, hospitals, and special home for the aged A A section or contiguous area that is primarily used for residential purposes B A section or contiguous area that is primarily a commercial area C A section primarily reserved as light industrial area D A section that is primarily reserved as a heavy industrial area

Maximum Allowable Noise Levels in General Areas, WHO

Reference / Jurisdiction Ambient Standard

Guidelines for Community Noise, WHO, 1999

International

Receptor: Residential; institutional; educational

Daytime (07:00-22:00): 55dBA

Nighttime (22:00-07:00): 45dBA

Receptor: Industrial; commercial

70dBA throughout the day



92

Result of Noise Level Monitoring (September and November 2018)

Tables 36 to 41 presented the noise level measurements at the different locations onsite:

September 2018

Table 36. Noise level in Ipo Dam Compound, 2018 September Sampling

Time (September 26-27, 2018)

Average dB(A)

DENR Standard for Light Industrial Area

Maximum Allowable Noise Level, dB(A)***

Remarks

1140H – 1340H 50.7 70 Passed 1340H – 1540H 51.0 70 Passed 1540H – 1740H 54.1 70 Passed 1740H – 1940H 53.3 70 Passed 1940H – 2140H 47.8 65 Passed 2140H – 2340H 46.4 65 Passed 2340H – 0140H 45.5 60 Passed 0140H – 0340H 46.9 60 Passed 0340H – 0540H 48.5 60 Passed 0540H – 0740H 55.2 60 Passed 0740H – 0940H 56.2 65 Passed 0940H – 1140H 55.5 65 Passed

Table 37. Noise level in San Mateo Brgy. Hall, 2018 September Sampling Time

(Sept 25-26, 2018)

DENR Standard for Residential

Area Maximum

Allowable Noise Level, dB(A)***

Baseline Wet

Season (31 Jul –

1 Aug 2013)

Average dB(A)

Remarks

1100H - 1300H 55 62.2 68.2 Exceeded the

Maximum Allowable

Noise Level

1300H - 1500H 55

66.8

67.4 Exceeded the

Maximum Allowable

Noise Level

1500H - 1700H 55

60.9

67.2 Exceeded the

Maximum Allowable

Noise Level

1700H - 1900H 55

64.2

67.6 Exceeded the

Maximum Allowable

Noise Level

1900H - 2100H 50

59.4

65.8 Exceeded the

Maximum Allowable

Noise Level



93

Sampling Time (Sept 25-26,

2018)

DENR Standard for Residential

Area Maximum

Allowable Noise Level, dB(A)***

Baseline Wet

Season (31 Jul –

1 Aug 2013)

Average dB(A)

Remarks

2100H - 2300H 50

61.4

62.4 Exceeded the

Maximum Allowable

Noise Level

2300H - 0100H 45

54.2

62.1 Exceeded the

Maximum Allowable

Noise Level

0100H - 0300H 45

47.5

57.9 Exceeded the

Maximum Allowable

Noise Level

0300H - 0500H 45

43.9

51.0 Exceeded the

Maximum Allowable

Noise Level

0500H - 0700H 45

51.6

53.2 Exceeded the

Maximum Allowable

Noise Level

0700H - 0900H 50

64.0

65.8 Exceeded the

Maximum Allowable

Noise Level

0900H - 1100H 50

63.6

65.2 Exceeded the

Maximum Allowable

Noise Level

Table 38. Noise level in MWSS Bigte Compound, 2018 September Sampling Time

(Sept 27-28, 2018)

DENR Standard for Light Industrial Area

Maximum Allowable Noise Level, dB(A)***

Average dB(A)

Remarks

1725H - 1925H 70 66.2 Passed

1925H - 2125H 65 65.5 Exceeded the Maximum Allowable

Noise Level 2125H - 2325H 65 63.9 Passed

2325H - 0125H 60 59.3 Passed 0125H - 0325H 60 55.7 Passed

0325H - 0525H 60 55.9 Passed






94

November 2018

Table 39. Noise level in Ipo Dam Compound, 2018 November Sampling

Time (Nov 20-21,

2018)

DENR Standard Maximum Allowable Noise

Level, dB(A)***

Average dB(A)

Remarks

1213H - 1413H 70 50.7 Passed

1413H - 1613H 70 51 Passed 1613H - 1813H 70 54.1 Passed

1813H - 2013H 70 53.3 Passed




0813H - 1013H 65 56.2 Passed

1013H - 1213H 70 55.5 Passed



95

Table 40. Noise level in San Mateo Brgy. Hall, 2018 November Sampling

Time (Nov 20-21,

2018)

DENR Standard Maximum Allowable

Noise Level, dB(A)***

Baseline Dry

Season (4-5 Jun

2014

Average dB(A)

Remarks

1213H - 1413H 55 61.70 50.7 Passed

1413H - 1613H 55 61.80 51 Passed

1613H - 1813H 55 63.00 54.1 Passed

1813H - 2013H 50 61.70 53.3 Exceeded the Maximum Allowable

Noise Level 2013H - 2213H 50 62.40 47.8 Passed


Noise Level 2413H - 0213H 45 55.90 45.5 Exceeded the

Maximum Allowable Noise Level


Noise Level 0413H - 0613H 50 42.60 48.5 Passed


Noise Level 0813H - 1013H 55 61.30 56.2 Exceeded the



Noise Level

Table 41. Noise level in MWSS Bigte Compound, 2018 November Sampling

Time (Nov 21-22,

2018)


Level, dB(A)***

Average dB(A)

Remarks

1539H-1739H 70 64.3 Passed

1739H-1939H 65 67.2 Exceeded the Maximum Allowable

Noise Level

1939H-2139H 65 68.1 Exceeded the Maximum Allowable

Noise Level 2139H-2339H 60 65.6 Exceeded the


2339H-0139H 60 58.8 Passed 0139H-0339H 60 57.9 Passed

0339H-0539H 65 58.5 Passed

0539H-0739H 65 58.2 Passed



96

Sampling Time

(Nov 21-22, 2018)


Level, dB(A)***

Average dB(A)

Remarks

0739H-0939H 70 61.6 Passed

0939H-1139H 70 66.1 Passed 1139H-1339H 70 67.9 Passed

1339H-1539H 70 65.1 Passed

Assesment3 for Noise Quality Monitoring (September and November 2018)

The noise measurement was conducted 4 times every 2 hours interval for a representative reading. Monitoring was conducted on a sunny, fair and cloudy weather associated with light to moderate winds. The prevailing winds at the time of sampling came mostly from various directions.

The results of the noise monitoring for 2018 September shows that stations located within the construction sites in Ipo Dam Site have passed the DENR standard for noise level. The noise at the vicinity of MWSS Bigte Compound was slightly elevated at 7:25-9:25 in the evening. The noise level at San Mateo Brgy Hall exceeded the DENR standard during the 24-hour sampling.

On the other hand, results of the noise monitoring for 2018 November also show within acceptable limit at Ipo Dam Site and slightly elevated noise at MWSS Bigte Compound at 17:39H-23:39H. The noise level at San Mateo Barangay Hall is within the noise level limit only in the afternoon (12:13H – 18:13H), late evening (20:13H – 22:13H) and early morning (04:13H – 06:13H).

It should be noted that the baseline data from 2014 survey showed that elevated noise level was predominant (passed the noise standard only at 3:00 - 5:00 AM). The results of the September 2018 noise monitoring show almost similar noise pattern with the 2014 baseline data. Such elevated noise level cannot be directly attributed to the construction works.

Summary of Sound Level Monitoring in General Construction Sites

Noise levels are measured weekly using portable sound level meter procured by CMC. Tables 42 to 51 indicated the results of noise monitoring from July to December 2018.

July 2018



97

Table 42. Sound levels in Bigte Construction Work Area 2018 July, morning Location Class D

Allowable Limit

Noise level , dB 1:00-6:00pm

Remarks

Max Min

Front Office

70 dB 60.6 54.3

Mwss Area

70 dB 70.1 65.2

Portal

70 dB 86.9 81 Beyond allowable

limit

Back Up Entrance

70 dB 96 89.2 Beyond allowable

limit



98

Location Class D Allowable

Limit


Remarks

Max Min

Control Cabin

70 dB 94.3 88.9 Beyond allowable

limit

Warehouse


limit

Tippler

70 dB 86 78.3 Beyond allowable

limit

Pre-Cast

70 dB 74.1 60.6 Beyond allowable

limit



99

Location Class D Allowable

Limit


Remarks

Max Min

Industrial Gate


limit

Water Treatment

70 dB 68.9 60.1 -



100

Table 43. Sound levels in Ipo Construction Work Area 2018 July, evening (9:00 pm – 10:00 pm) Location Class C

Allowable Limit


Remarks

Max Min

Ipo Dam Bridge

65 dB 59.2 57.1 -

Mwss Operation Office

65 dB 68.7 60.3 Beyond allowable limit

Ipo Site Slope

65 dB 61.5 58 -

Ipo Site Access

65 dB 61.2 56.6 -



101

Location Class C Allowable

Limit


Remarks

Max Min

Ipo Site Office

65 dB 60.4 56.7 -

Ipo Site Downstream

65 dB 54.8 50.5 -



102

August 2018

Table 44. Sound levels in Ipo Work Area – Sitio Ipo (Vicinity of Watershed Building, across the Ipo Dam on 15 Aug 2018 (9:00 AM – 9:00 PM)

SAMPLING TIME NOISE LEVEL (DB)

DENR STANDARD MAXIMUM

ALLOWABLE NOISE LEVEL

CLASS A, DB

REMARKS

0500H – 0900 H (Morning) 61.4 50

Ear Plug Required

0900H – 1800 H (Daytime) 70 55

Ear Plug Required

1800H – 2200 H (Evening) 65.3 50

Ear Plug Required

2200H – 0500 H (Nighttime)

62 45 Ear Plug Required

For Class A (A section which is primarily a RESIDENTIAL area)

Table 45. Sound levels in Bigte Work Area – Portal Area (at tally room vicinity) on 15 Aug 2018 (9:00 AM – 8:00 PM)



ALLOWABLE NOISE LEVEL CLASS C, DB

REMARKS

0500H – 0900 H (Morning) 82.1 65

Required ear plug

0900H – 1800 H (Daytime) 79.3 70

Required ear plug

1800H – 2200 H (Evening) 64 65

Normal, within the limit


64 60 Ear plug required

For Class C (A section primarily zoned or used as a LIGHT INDUSTRIAL area)



103

Table 46. Sound levels in Sitio Settling (about 100m from portal, MWSS Bigte) on 15 Aug 2018 (9:15AM to 8:45 PM)




CLASS A, DB

REMARKS

0500H – 0900 H (Morning)

65.4 50 Ear plug required

0900H – 1800 H (Daytime)


1800H – 2200 H (Evening)



62 45 Ear plug required

For Class A (A section which is primarily a RESIDENTIAL area)

Table 47. Sound levels in Industrial Area (about 100m from portal, MWSS Bigte) on 15 Aug 2018 (9:30 AM to 8:30 PM)




CLASS C, DB

REMARKS (PASSED OR EXCEEDED)

0500H – 0900 H (Morning)

78.1 65 Required Ear plug

0900H – 1800 H (Daytime)

67.6 70 Normal



104

1800H – 2200 H (Evening)

64 65 Normal


54.1 60 Normal

For Class C (A section primarily zoned or used as a LIGHT INDUSTRIAL area)

Table 48. Sound levels in Outside the Tippler Area (about 200m from portal, MWSS Bigte on 15 Aug 2018 (10:00 AM to 9:00 PM)


DENR STANDARD MAXIMUM ALLOWABLE NOISE

LEVEL CLASS A,

DB

REMARKS (PASSED OR EXCEEDED)

0500H – 0900 H (Morning) 71.4 50 Over the limit 0900H – 1800 H (Daytime) 65.6 55 Over the limit 1800H – 2200 H (Evening) 64.9 50 Over the limit


57.8 45 Over the limit

October 2018

Table 49. Sound levels in Bigte Construction Work Area 2018 October

Location Allowable Limit

Unit Maximum Minimum Remarks

70 dB 59.2 57.3

Within

allowable

limit



105



Front Office

Portal

70 dB 89.9 77.6

Exceeded

allowable

limit

(Earplugs

are

needed)

MWSS Area

70 dB 61.5 59.9

Within

allowable

limit

TBM (Back Up)

70 dB 89.2 88.7

Exceeded

allowable

limit

(Earplugs

are

needed)



106



TBM (Control Cabin)

70 dB 86.4 73.4

Exceeded

allowable

limit

(Earplugs

are

needed)

TBM (Erection Area)

70 dB 88.3 84.2

Exceeded

allowable

limit

(Earplugs

are

needed)

Tippler

70 dB 81.3 79.2

Within

allowable

limit

Wastewater Treatment Plant

(WTP)

70 dB 74.8 60.3

Exceeded

allowable

limit

(Earplugs



107



are

needed)

Industrial Gate

70 dB 65.1 60.5

Within

allowable

limit

Main Gate

70 dB 72.7 52.8

Exceeded

allowable

limit

(Earplugs

are

needed)

Warehouse

70 dB 62.2 58.3

Within

allowable

limit



108

November 2018

Table 50. Sound Level Monitoring, 30 November 2018 (6:00pm-9:00 pm)

Location Allowable

Limit Maximum Minimum Time Remarks

Front Office

65dB 54.1 50.7 7:08 PM Within allowable

limit

Portal

65dB 81.2 80.1 7:32 PM

Exceeded

allowable limit

(Earplugs are

needed)

Back-Up (TBM)

65dB 94.1 93.7 9:15 PM

Exceeded

allowable limit

(Earplugs are

needed)

TBM (Control Cabin)

65dB 92.3 87.4 9:30 PM

Exceeded

allowable limit

(Earplugs are

needed)



109

Location Allowable


Industrial Area (Warehouse)

65dB 74.6 52.8 7:45 PM

Exceeded

allowable limit

(Earplugs are

needed)

Industrial Area (Gate)

65dB 74 51.6 7:49 PM

Exceeded

allowable limit

(Earplugs are

needed)

Tippler

65dB 85 81 7:58 PM

Exceeded

allowable limit

(Earplugs are

needed)

Main Gate

60dB 69.4 47.2 11:20 PM

Exceeded

allowable limit

(Earplugs are

needed)



110

Location Allowable


Main Gate

65dB 108.7 103.6 8:15 PM

Exceeded

allowable limit

(Earplugs are

needed



111

December 2018

Table 51. Sound Level Monitoring, 1 December 2018 (6:00pm-9:00 pm)

Location Allowable


Front Office

50dB 54.1 50.7 7:08 PM

Exceeded allowable limit (Earplugs are

needed)

Portal

65dB 81.2 80.1 7:32 PM


needed)

Back-Up (TBM)

70dB 94.1 93.7 9:15 PM


needed)

70dB 92.3 87.4 9:30 PM


needed)



112

Location Allowable


TBM (Control Cabin)

Industrial Area (Warehouse)

70dB 74.6 52.8 7:45 PM


needed)

Industrial Area (Gate)

65dB 74 51.6 7:49 PM


needed)

Tippler

70dB 85 81 7:58 PM


needed)

Main Gate

65dB 69.4 47.2 11:20 PM


needed)



113

Location Allowable


Main Car

70dB 108.7 103.6 8:15 PM


needed



114

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).



115

Table 52. Tunnel air quality monitoring (July to December 2018)

Air quality parameter

standard

reference Reading, ppm

2018 Jul

Reading, ppm

2018 Aug

Reading, ppm

2018 Sep

Reading, ppm

2018 Oct

Reading, ppm

2018 Nov

Reading, ppm

2018 Dec

Average

Carbon Dioxide, CO2 (ppm)13 1000 NIOSH 0.029770 0.029770 0.0088 0.01 0.0093 -0.0279

Hydrogen Sulfide, H2S (ppm)14 10-20 WHO, 2000 0.000005 0.000005 0.0000 0.00 0.0000 0.0000

Oxygen, O2 (%) 17.6-23.5

WHO, 2000 20.994605 20.994605 21.0000 21.00 20.9984 20.9996

Carbon Monoxide, CO15 8.73 WHO, 2000 0.018813 0.018813 0.2361 0.07 0.0519 0.0436

Hydrogen Cyanide, HCN (ppm)16 44.64 WHO,2004 0.006171 0.006171 0.0066 0.01 0.0071 0.0062

Minimum

CO2 (ppm) 1000 NIOSH -0.959144 -0.959144 0.000000 -0.20 -0.7586 -0.2292

H2S (ppm) 10 WHO, 2000 0.000000 0.000000 0.000000 0.00 0.0000 0.0000

O2 (%) 17.6 WHO, 2000 0.000000 0.000000 21.0000 0.00 0.0000 0.0000

CO (ppm) 8.73 (8 hrs)

WHO, 2000 0.000000 0.000000 0.000000 0.00 0.0000 0.0000

HCN (ppm) 17.86 WHO,2004 - - - -0.35 0.0000 -0.5350

Maximum

CO2 (ppm) 1000 NIOSH 1.191796 1.191796 0.3092 1.05 0.5790 0.3045

H2S (ppm) 20 WHO, 2000 2.000000 2.000000 0.0000 0.00 0.0000 0.0000

13 The National Institute for Occupational Safety and Health (NIOSH) considers that indoor air concentrations of carbon dioxide that exceed 1,000 ppm are a marker suggesting inadequate ventilation. 14 Threshold for eye irritation. Ref: Air quality guidelines WHO Regional Office for Europe, Copenhagen, Denmark 2000.

15 15 minutes – 100 mg/m3. 1 hour – 35 mg/ m3. 8 hours – 10 mg/ m3. 24 hours – 7 mg/m3. WHO 2000 Guideline (https://www.ncbi.nlm.nih.gov/books/NBK138710/)

16 In WHO study, moderate impairment in health-related scores showed an increase (no statistical analysis) at exposure levels in excess of 2.5 cyanide hours (mg/m3 × h). Adverse effects are not expected at the low levels reported

i a bie t air usually below μg/ 3 = . pp .



116

Air quality parameter

standard

reference Reading, ppm

2018 Jul

Reading, ppm

2018 Aug

Reading, ppm

2018 Sep

Reading, ppm

2018 Oct

Reading, ppm

2018 Nov

Reading, ppm

2018 Dec

O2 (%) 23.5 WHO, 2000 22.000000 22.000000 21.0000 21.00 21.0000 21.0000

Carbon Monoxide, CO (ppm) 30.55 (1hr)

WHO, 2000 22.000000 22.000000 21.0000 63.00 47.0000 47.0000

Hydrogen Cyanide, HCN (ppm) 53.57 (20 min to 1hr)

WHO,2004 - - - 3.77 4.5914 6.3505



117

Assessment for Indoor Air Quality Monitoring (July to December 2018)

The air quality inside the tunnel is still within NIOSH and WHO indoor air quality standards.

October 2018 monitoring shows maximum CO measurement at 63 ppm. This reading is noted from 10:42:50 to 10:44:30 on October 14, 2018. November 2018 monitoring shows that the CO exceedance, which ranges from 31-47 ppm, as noted in the maximum reading was observed from 11:43:55 to 11:46:10 on November 9, 2018. Furthermore, the CO exceedance, which ranges from 32-47 ppm, as noted in the maximum reading was observed from 10:05:23 to 10:05:58 on December 2, 2018. These exceedances on CO are just noted for a little more than 2 minutes and less than a minute, respectively. This means the TBM’s ventilation system and its gas control sensors are effectively bringing fresh air, reducing the CO2 footprint inside the tunnel.

Spoil Management and Monitoring Program

Summary of Sediment Quality of Spoil/Excavated Materials

The compact volume of the excavated material, given a 5,988 m tunnel length, is estimated at about 114,781 m3 as of December 31, 2018 (Table 53). The spoil is disposed in the Temporary Spoil Disposal in Bigte.

Table 53. Spoil/ Excavated Materials

Total excavated materials/ spoil (m3) 114, 781

Excavated materials (starting Feb 13, 2018 until previous month), (m3)

108, 437

Excavated materials in December 2018, (m3) 6, 344

Given a swelling factor of ~1.80, the spoil/ excavated materials that is temporarily dumped at the Tippler Area for the period is about 11,419 m3 or about 206,606 m3 total spoil generated.

The delivery receipts of spoil/ excavated material showed a total collection of spoil of about 211,659 m3 with 12,505 m3 for the month of December 2018 (Fig. 8). The little discrepancy in volume may be due to the computation based on delivery receipts/ number of truck collection and capacity of trucks. It should be noted that in most cases, the dump trucks for spoil collection are not fully filled.



118

Figure 8. Excavated Material and TBM advancement

201

8-

Feb

-

Mar

201

8-

Apr

201

8-

Ma

y

201

8-

Jun

e

201

8-

July

201

8-

Aug

201

8-

Sep

t

201

8-

Oct

201

8-

Nov

201

8-

Dec

Spoil Volume/ Month 5,98715,47321,53715,86723,80626,33629,26230,38930,49812,505

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

Sp

oil

, m

3

Axis Title

Excavated Materials as per delivery receipt



119

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.



120

Table 54. Sediment Quality of Spoil/ excavated material

Parameter

Adopted Criteria

reference

Sample ID

maximum average concentration for characterization

absolute maximum

concentration

Spoil Material Sample No. 1

Chainage CH 0+031.92

Spoil Material

Sample No. 2 Chainage

CH 0+142.36

CH 0+317.59

TBM Tunnel

CH 0+485.212

TBM Tunnel

Spoil Material - TBM CH: 0+629,38

Material Sample CH 3 + 881.221

Date of sampling

2-Feb-18 2-Feb-18 7-Apr-18 23-Apr-18 4-May-18 19-

Sept-18


Total Nitrogen (mg/kg)

25 125 soil quality ANZECC 198 205 94 76 147 417

Total Phosphorus (mg/kg)

25 2,000

Assessment levels for soil, sediment and water (Contaminated Sites Management Series) Department of Environment and Conservation, ANZECC

294 1,180 1450 1560 1,040 905


Oil and Grease (mg/kg)

1,500

Ontario Ministry of the Environment guidelines for open lake disposal of sediments17

496 353 489 589 1,190 193

Potassium (K) (mg/kg)

60 100+ soil quality ANZECC 240 762 1,130 793 - 245

Elements -

17 Ontario Ministry of the Environment guidelines for open lake disposal of sediments (Beyer, W N. 1990. Evaluating soil contamination U.S Fish Wildl. Serv., Biol. Rep. 90(2). 25 pp.; and Irwin, RJ, M. VanMouwerick, L. Stevens,

MD. Seese, and W. Basham. 1997. Environmental Contaminants Encyclopedia. National Park Service, Water Resource Division, Fort Collins, Colorado.)



121

Parameter

Adopted Criteria

reference

Sample ID


absolute maximum

concentration



Spoil Material


CH 0+142.36

CH 0+317.59

TBM Tunnel

CH 0+485.212

TBM Tunnel



Chromium (mg/kg)

75 150

NSW EPA. Protection of the Environment

Operations (Waste) Regulation 2014.

Application to land as engineering fill or for use in

earthworks

6.9 1.0 1.4 0.9 3.6 ND

Copper** (mg/kg)

100 200




earthworks

117 121 110 88 73

Iron (mg/kg) 17 26,600 24,900 15,900 - 10,700

Lead (mg/kg) 50 100




earthworks

6,610 ND ND ND ND ND

Manganese (mg/kg)

ND 916 345 330 396 286

Nickel (mg/kg) 30 60




earthworks

129 9.4 2.3 2.3 5.9 2.5



122

Parameter

Adopted Criteria

reference

Sample ID


absolute maximum

concentration



Spoil Material


CH 0+142.36

CH 0+317.59

TBM Tunnel

CH 0+485.212

TBM Tunnel



Zinc (mg/kg) 150 300




earthworks

8.1 29 31 47 21 20



123

Assessment for Sediment Quality of Spoil / Excavated Material

The spoil samples are within the acceptable heavy metal content.

Freshwater Monitoring Program (Wet Season)

Freshwater Ecology Survey was conducted on September 20, 2018. The survey was led by Dr

Roberto Pagulayan. There are 5 Dumagats who served as local assistants during the conduct

of the survey.

Sampling site at Sta.Maria River

Sampling at Angat River adjacent to the construction site

In situ water quality measurement and preparation of various samples

Fish sampling at near Sitio Settling, Brgy Bigte

Photo 2. River Ecology Monitoring, 2018 September

The report will be available in March 2019.



124

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.



125

Plot

Transect

Amphibian observation

Sorting of biomass

Setting up of monitoring plot in MWSS Bigte Compound

Rodent traps held by a Dumagat field assistant

Photo 3. Terrestrial Ecology Monitoring, 2018 August



126

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



127

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.



128

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.



129

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.



130

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.



131

Photo 7. First Community Assembly with Dumagats led by NCIP

Photo 8. Second Community Assembly with Dumagats led by NCIP, 29 August 2018



132



133

5 Complaints

Details of Complaint/s

No grievance cases have been reported from July to December 2018 (Table 55). Previous reported valid grievance cases were already resolved. (Please see Jan-Dec 2017 SEMR)

Table 55. List of grievances as of December 2018

Invalid Grievance Cases 0

Unresolved Grievance Case from previous months

0

Pending Valid Grievance Cases 0

Resolved Grievance Cases to date 0



134

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.



135

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



136

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



137

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.



138

• 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



139

- 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.



140

- 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.


- 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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• 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.


• Tunnel


- 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.


- 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



• 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.


• 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-



147

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-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.




149


- 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-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.


- 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


(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


- 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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AWTIP Monitoring Matrix



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Laboratory Results



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Tree Cutting Permit



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Terrestrial Ecology Monitoring Report



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Related Documentation on Hazardous Materials



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NCIP



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Tunnel Geotechnical Profile

Environmental Monitoring Report · Angat Water Transmission Improvement Project – Tunnel 4 Semi Annual Environmental Monitoring Report 4 2018 July to December v Table 44. Sound

Documents