SFG3527 Public Disclosure Authorized ENVIRONMENTAL IMPACT ASSESSMENT REPORT FOR COMBINED WATER SUPPLY SCHEME TO SANKARANKOIL, PULIYANKUDI MUNICIPALITIES AND THIRUVENKADAM TOWN PANCHAYAT IN TIRUNELVELI DISTRICT, RAJAPALAYAM, SIVAKASI, THIRUTHANGAL MUNICIPALITES IN VIRUDHUNAGAR DISTRICT WITH RIVER TAMIRABARANI AS SOURCE. Public Disclosure Authorized Public Disclosure Authorized Public Disclosure Authorized May 2017 PROVIDING CWSS TO SANKARANKOIL, PULIYANKUDI MUNICIPALITIES AND THIRUVENKADAM TOWN PANCHAYAT IN TIRUNELVELI DISTRICT, RAJAPALAYAM, SIVAKASI, THIRUTHANGAL MUNICIPALITES IN VIRUDHUNAGAR DISTRICT WITH RIVER TAMIRABARANI AS SOURCE. Table of Contents EXECUTIVE SUMMARY 1. INTRODUCTION ............................................................................................................................................................. 1.1 PREAMBLE .............................................................................................................................................................. 11 1.2 PROFILE OF THE STUDY AREA ...................................................................................................................... 1 1.3 EXISTING WATER SUPPLY ............................................................................................................................... 5 1.4 SCOPE OF THE PROJECT ................................................................................................................................... 6 1.5 NEED FOR THE PROJECT .................................................................................................................................. 6 1.6 PROJECT PROPOSAL ........................................................................................................................................... 7 1.6.1 Population Forecasts & Demand Projections ................................................................................... 8 1.6.2 Design Period ................................................................................................................................................ 9 1.7 CATEGORISATION OF PROJECT ..................................................................................................................... 9 1.8 STRUCTURE OF THE REPORT ..................................................................................................................... 10 2.1 Introduction ......................................................................................................................................................... 11 2.2 Cost Details .......................................................................................................................................................... 16 2.3 Components of the project ............................................................................................................................ 18 2.3.1 Head Work ................................................................................................................................................... 18 2.3.1.1 Sustainability of the source ............................................................................................................... 18 2.3.2 Water Treatment Plant ........................................................................................................................... 23 2.3.2.1 Water Treatment Process: ................................................................................................................. 24 2.3.3 Booster Stations ........................................................................................................................................ 31 2.3.4 Pumping Main ............................................................................................................................................ 32 2.3.5 ULB Sumps ................................................................................................................................................... 35 2.3.6 Service Reservoirs .................................................................................................................................... 36 2.3.7 Distribution System ................................................................................................................................. 38 2.4 Details of Land / Sites for proposed structures .................................................................................... 40 2.5 Description of the Alignment ....................................................................................................................... 41 2.6 Man Power Requirement ............................................................................................................................... 45 2.7 Power Requirement ......................................................................................................................................... 45 2.8 Construction Schedule .................................................................................................................................... 47 3. ENVIRONMENTAL REGULATORY FRAMEWORK........................................................................................ 49 3.1 INTRODUCTION ................................................................................................................................................. 49 PROVIDING CWSS TO SANKARANKOIL, PULIYANKUDI MUNICIPALITIES AND THIRUVENKADAM TOWN PANCHAYAT IN TIRUNELVELI DISTRICT, RAJAPALAYAM, SIVAKASI, THIRUTHANGAL MUNICIPALITES IN VIRUDHUNAGAR DISTRICT WITH RIVER TAMIRABARANI AS SOURCE. 3.2 ENVIRONMENTAL POLICIES AND REGULATIONS ............................................................................. 49 3.2.1 Environmental and Social Management Framework ................................................................ 49 3.2.2 Operational Policies and Directives of World Bank ................................................................... 50 3.2.4 Environmental Policy and Regulatory Frameworks in India ................................................. 50 3.2.5 Regulatory Framework in the State of Tamil Nadu .................................................................... 54 3.2.6 Clearances/ NOC Required from Competent Authority............................................................ 56 4. BASELINE ENVIRONMENTAL PROFILE .......................................................................................................... 57 4.1 Introduction ......................................................................................................................................................... 57 4.2 Scope of Baseline Study .................................................................................................................................. 57 4.3 Sampling Locations........................................................................................................................................... 61 4.4 Micro Meteorology ............................................................................................................................................ 61 4.4.1 Temperature ............................................................................................................................................... 61 4.4.2 Rainfall .......................................................................................................................................................... 61 4.4.3 Relative Humidity ..................................................................................................................................... 62 4.4.4 Wind Speed Direction in Project Site (WTP) ................................................................................. 63 ..................................................................................................................................................................................... 63 4.5 Air Environment ................................................................................................................................................ 66 4.5.1 Ambient Air Quality (AAQ) ................................................................................................................... 66 4.5.2 Monitoring Location and Methodology ........................................................................................... 66 4.5.3 Results and Discussions ......................................................................................................................... 67 4.5.4 Observation for AAQ Results ................................................................................................................ 69 4.6 Noise Environment ........................................................................................................................................... 69 4.7 Water Environment .......................................................................................................................................... 71 4.7.1 Surface Water ............................................................................................................................................. 71 4.7.2 Ground Water .................................................................................................................................................. 71 4.7.3 Water Quality assessment .......................................................................................................................... 71