Fall 08 Maynilad Water Services, Inc. Public Disclosure Authorized Public Disclosure Authorized Valenzuela Sewerage System Project Environmental Assessment Report Public Disclosure Authorized Public Disclosure Authorized M a r c h 2 0 1 4 Environmental Assessment Report VALENZUELA SEWERAGE SYSTEM PROJECT CONTENTS Executive Summary ...................................................................................................................................... 7 Project Fact Sheet ..................................................................................................................................... 7 Introduction ................................................................................................................................................ 7 Brief Description of the Project .................................................................................................................. 8 A. Project Location ............................................................................................................................. 8 B. Project Components ....................................................................................................................... 9 C. Project Rationale .......................................................................................................................... 10 D. Project Cost .................................................................................................................................. 10 E. Project Phases ............................................................................................................................. 10 F. Types of Major Wastes ................................................................................................................ 11 Summary of Project’s EIA Process ......................................................................................................... 11 A. Description of Philippines Policy, Legal and Administrative Framework ..................................... 11 B. World Bank’s Environment Safeguards Requirements ................................................................ 12 C. Organization and Structure of the EIS Report ............................................................................. 13 D. EIA Study Schedule ..................................................................................................................... 13 E. EIA Study Area ............................................................................................................................. 13 F. EIA Methodology .......................................................................................................................... 14 G. Public Participation ....................................................................................................................... 14 Summary of Baseline Characterization ................................................................................................... 15 Key Environmental Impacts ..................................................................................................................... 17 A. Benefits ........................................................................................................................................ 17 B. Adverse Impacts and Associated Mitigating Measures ............................................................... 17 Environmental Management and Monitoring Plan .................................................................................. 17 Summary of Impact Assessment and Environmental Management Plan ............................................... 18 Summary of Environmental Monitoring Plan ........................................................................................... 24 Environmental Monitoring Fund and Environmental Guarantee Fund .................................................... 27 1. Project Background and Rationale ...................................................................................................... 28 2. Project Description ............................................................................................................................... 28 2.1 Project Location and Area ............................................................................................................ 28 2.2 Project Rationale .......................................................................................................................... 29 2.3 Project Alternatives ....................................................................................................................... 30 2.3.1 Without Project Alternative ...................................................................................................... 30 2.3.2 Siting Alternative ..................................................................................................................... 30 2.3.3 Sewerage Alternatives ............................................................................................................ 30 2.3.3.1 Sewage Treatment Options ............................................................................................ 31 2.3.3.2 Implementation Schedule and Risks ............................................................................... 32 2.3.3.3 Environmental and Health Benefits ................................................................................. 32 2.4 Project Development Plan, Process Technology and Project Components ................................ 32 2.4.1 Interception and Conveyance System .................................................................................... 32 2.4.2 Sewage Treatment Plant ......................................................................................................... 35 2.4.2.1 Preliminary Treatment System ........................................................................................ 35 2.4.2.2 Secondary Treatment ...................................................................................................... 35 2.4.2.3 Tertiary Treatment ........................................................................................................... 36 2.4.2.4 Sludge Management ....................................................................................................... 36 2.4.2.5 Odor Control .................................................................................................................... 37 2.4.2.6 Amenities, Equipment and Machinery............................................................................. 37 2.5 Description of Project Phases (Activities/Environmental Aspects, Associates Wastes and Built-in Pollution Control Measures) .................................................................................................................... 38 2.5.1 Pre-Construction/Pre-Operational Phase ............................................................................... 38 2.5.2 Construction/Development Phase ........................................................................................... 38 2.5.2.1 Construction Wastes and Management Measures ......................................................... 38 2 | P a g e Environmental Assessment Report VALENZUELA SEWERAGE SYSTEM PROJECT 2.5.3 Operational Phase................................................................................................................... 38 2.5.3.1 Waste Production and Management Scheme During Operational Phase ...................... 39 2.5.4 Abandonment Phase ............................................................................................................... 39 2.6 Manpower Requirements ............................................................................................................. 39 2.7 Project Cost .................................................................................................................................. 39 3 Analysis of Key Environmental Impacts ............................................................................................... 40 3.1 Land .............................................................................................................................................. 40 3.1.1 Land Use and Classification .................................................................................................... 40 3.1.1.1 Affected Structures at Proposed STP Site ...................................................................... 40 3.1.1.2 Affected Structures along Sewer Network ...................................................................... 42 3.1.2 Topography ............................................................................................................................. 42 3.1.3 Geology ................................................................................................................................... 43 3.1.4 Tectonic Setting....................................................................................................................... 44 3.1.4.1 Geologic Hazards ................................................................................................................ 45 A. Ground Rupture................................................................................................................... 45 B. Ground Shaking .................................................................................................................. 45 C. Differential Settlement and