Fall 08 Environmental Impact Statement SOUTH SEPTAGE TREATMENT PLANT Maynilad Water Services, Inc. Public Disclosure Authorized Public Disclosure Authorized South Septage Treatment Plant Alabang-Zapote Road, Barangay Pamplona Uno, Las Piñas City Environmental Impact Statement Public Disclosure Authorized Public Disclosure Authorized M a y 2014 1 | P a g e Environmental Impact Statement SOUTH SEPTAGE TREATMENT PLANT CONTENTS Executive Summary ...................................................................................................................................... 7 Project Fact Sheet ..................................................................................................................................... 7 Introduction ................................................................................................................................................ 7 Brief Description of the Project .................................................................................................................. 8 A. Project Location ............................................................................................................................. 8 B. Project Components ....................................................................................................................... 8 C. Project Rationale ............................................................................................................................ 9 D. Project Phases ............................................................................................................................... 9 E. Types of Major Wastes ................................................................................................................ 10 Summary of Project’s EIA Process ......................................................................................................... 10 A. Description of Philippines Policy, Legal and Administrative Framework ..................................... 10 B. World Bank’s Environment Safeguards Requirements ................................................................ 11 C. Organization and Structure of the EIS Report ............................................................................. 12 D. EIA Study Schedule ..................................................................................................................... 12 E. EIA Study Area ............................................................................................................................. 12 F. EIA Methodology .......................................................................................................................... 13 G. Public Participation ...................................................................................................................... 13 Summary of Baseline Characterization ................................................................................................... 14 Key Environmental Impacts ..................................................................................................................... 16 A. Benefits ........................................................................................................................................ 16 B. Adverse Impacts and Associated Mitigating Measures ............................................................... 16 Environmental Management and Monitoring Plan .................................................................................. 16 Environmental Monitoring Fund and Environmental Guarantee Fund .................................................... 17 1. Project Background and Rationale ...................................................................................................... 18 2. Project Description ............................................................................................................................... 18 2.1 Project Location and Area .............................................................................................................. 18 2.2 Project Rationale ............................................................................................................................ 21 2.3 Project Alternatives ........................................................................................................................ 21 2.3.1 Without Project Alternative ...................................................................................................... 21 2.3.2 Siting Alternative ..................................................................................................................... 21 2.3.3 Sanitation Alternatives ............................................................................................................ 21 2.3.3.1 Septage Treatment Options .............................................................................................. 21 2.4 Project Development Plan, Process Technology and Project Components .................................. 22 2.4.1.1 Amenities, Equipment and Machinery .............................................................................. 26 2.5 Description of Project Phases ........................................................................................................ 27 2.5.1 Pre-Construction/Pre-Operational Phase ............................................................................... 27 2.5.2 Construction/Development Phase ........................................................................................... 27 2.5.2.1 Construction Wastes and Management Measures ........................................................... 27 2.5.3 Operational Phase................................................................................................................... 27 2.5.3.1 Waste Production and Management Scheme During Operational Phase ....................... 27 2.5.4 Abandonment Phase ............................................................................................................... 27 2.6 Manpower Requirements ............................................................................................................... 28 3 Analysis of Key Environmental Impacts ............................................................................................... 29 3.1 Land ............................................................................................................................................... 29 3.1.1 Land Use and Classification .................................................................................................... 29 3.1.1.1 Affected Structures at Proposed STP Site ....................................................................... 30 3.1.2 Topography and Physiography ............................................................................................... 30 3.1.3 Soil .......................................................................................................................................... 31 3.1.4 Geology ................................................................................................................................... 32 3.1.5 Geomorphology ....................................................................................................................... 33 3.1.6 Tectonic Setting....................................................................................................................... 34 3.1.6.1 Geologic Hazards ................................................................................................................ 35 A. Ground Rupture .................................................................................................................... 35 2 | P a g e Environmental Impact Statement SOUTH SEPTAGE TREATMENT PLANT B. Ground Shaking .................................................................................................................... 35 C. Differential Settlement and Liquefaction ............................................................................... 35 D. Damage to Adjacent Properties ............................................................................................ 37 3.1.7 Flora and Fauna ...................................................................................................................... 38 3.2 The Water....................................................................................................................................... 38 3.2.1 Hydrology ................................................................................................................................ 38 3.2.1.1 Flooding ............................................................................................................................... 39 3.2.1.2 Uses of the River ................................................................................................................. 40 3.2.2 Water Quality ........................................................................................................................... 40 3.2.2.1 Surface Water Quality ....................................................................................................... 40 3.2.3 Groundwater ............................................................................................................................ 42 3.3 The Air ............................................................................................................................................ 43 3.3.1 Meteorology