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REPUBLIC OF KENYA MINISTRY OF WATER & SANITATION MOMBASA WATER SUPPLY AND SANITATION COMPANY LIMITED (MOWASSCO) ENVIRONMENTAL AND SOCIAL IMPACT ASSESSMENT PROJECT REPORT FOR KIPEVU WASTE WATER TREATMENT PLANT IMMEDIATE WORKS AND EXTENSION Report Prepared by: Zamconsult Consulting Engineers NOVEMBER 2018 i Kipevu Waste Water Treatment Plant immediate Works and Extension ESIA Report DECLARATION LEAD EXPERT I Eng. Dr. Zablon I. Oonge on behalf of Zamconsult Consulting Engineers, submit this Environmental and Social Impact Assessment (ESIA) Project Report, for Proposed Kipevu Wastewater Treatment Plant (WWTP) and the sewers in the West Mainland service area. This Report has been done with reasonable skills, care and diligence in accordance with the Environmental Management and Coordination Act (EMCA), 1999 and the Environmental Impact Assessment and Audit Regulations, 2003. I hereby certify that the particulars given in this ESIA Report are correct to the best of my knowledge: Signature: ______________________________________ Date: ________30/11/2018__________ Designation: EIA/Audit Lead Expert Reg. No 0217 Zamconsult Consulting Engineers i Kipevu Waste Water Treatment Plant immediate Works and Extension ESIA Report ACKNOWLEDGEMENT We would like to register our sincere appreciations to all those who made the entire Environmental and Social Impact Assessment (ESIA) study a success. In this regard we would first extend our thanks to Mr. Alphonce Okoth – Kipevu Waste Water Treatment Plant Manager and Jared Mjomba – Technical Officer (Networks Waste Water), for the support they gave us during the study period. Secondly we would like to thank all the Enumerators for the household survey they undertook on behalf of the team, Chiefs, and Assistant Chiefs whom we worked closely in the field in the course of the study. Third, we would like to appreciate the contribution of all the government officers from all the relevant departments that we interacted with in the course of the ESIA study for Proposed Kipevu Wastewater Treatment Plant (WWTP) and the sewers in the West Mainland service area. Fourth, the tireless efforts of the community representative committee members in the process went a long way in making this process a success. Fifth is the appreciation of the commitment and tolerance exhibited by all the community members within and outside the project area. Our sincere appreciations finally go to Coast Water Services Board, the project proponent for having offered us the chance to carry out this Environmental and Social Impact Assessment project report. Zamconsult Consulting Engineers i Kipevu Waste Water Treatment Plant immediate Works and Extension ESIA Report MINISTRY OF WATER & SANITATION MOMBASA WATER SUPPLY AND SANITATION COMPANY LIMITED (MOWASSCO) ENVIRONMENTAL AND SOCIAL IMPACT ASSESSMENT (ESIA) PROJECT REPORT CONTENTS DECLARATION ......................................................................................................................................................... i ACKNOWLEDGEMENT ............................................................................................................................................. i LIST OF TABLES ...................................................................................................................................................... v LIST OF FIGURES ..................................................................................................................................................... v LIST OF PHOTOGRAPHS ......................................................................................................................................... v LIST OF ABBREVIATIONS ...................................................................................................................................... vi EXECUTIVE SUMMARY ......................................................................................................................................... vii 1 INTRODUCTION............................................................................................................................................ 1 1.1 General .................................................................................................................................................... 1 1.2 Goals and Objectives of this Study ........................................................................................................ 1 1.3 Project Description ................................................................................................................................. 3 1.3.1 Summary Description of the Main Project Components ............................................................... 3 1.3.1.1 Chaani Upgrading Scheme ...................................................................................................... 3 1.3.1.2 Chaani Trunk Sewer ................................................................................................................ 4 1.3.1.3 Changamwe Site and Service Scheme ................................................................................... 4 1.3.1.4 Changamwe Trunk Sewer ....................................................................................................... 4 1.3.1.5 Hamisi Municipal Estate .......................................................................................................... 4 1.3.1.6 Export Processing Zone (EPZ) Area ....................................................................................... 4 1.3.1.7 Mikindani Site and Service Scheme ........................................................................................ 5 1.3.1.8 Mikindani Pumping Station and Rising Main ......................................................................... 5 1.3.1.9 Mikindani Trunk Sewer ........................................................................................................... 5 1.3.1.10 Miritini Site and Service Scheme ............................................................................................ 5 1.3.1.11 Miritini Trunk Sewer ................................................................................................................ 5 1.3.1.12 Miritini Pumping Stations ....................................................................................................... 6 1.3.1.13 Port Reitz Trunk Sewer ........................................................................................................... 6 1.3.1.14 Port Reitz Pumping Station .................................................................................................... 6 1.3.2 Kipevu Wastewater Treatment Plant ............................................................................................ 6 1.3.3 Preconstruction Phase ................................................................................................................... 7 1.3.4 Construction and Operation& Maintenance Phase ....................................................................... 8 1.4 Scope of the Services ............................................................................................................................. 8 1.5 Study Methodology ................................................................................................................................ 8 1.5.1 Data Collection Methods ............................................................................................................... 8 1.5.1.1 Direct Observation .................................................................................................................. 8 1.5.1.2 Interview of Key Informants ................................................................................................... 9 1.5.1.3 Questionnaires ........................................................................................................................ 9 1.5.1.4 Review of Available Information ............................................................................................ 9 1.5.1.5 Screening and Scoping .......................................................................................................... 10 1.5.2 Sampling Technique .................................................................................................................... 10 1.5.3 Data Analysis and Discussion ....................................................................................................... 10 2 DESCRIPTION OF THE PROJECT AREA...................................................................................................... 11 2.1 Project Location .................................................................................................................................... 11 2.2 The Background of Proposed Project ................................................................................................. 11 2.3 Project Overview .................................................................................................................................. 13 2.4 The Physical Environment .................................................................................................................... 17 2.4.1 Climate ......................................................................................................................................... 17 2.4.2 Topography ................................................................................................................................. 18 2.4.3 Geology and Soils ........................................................................................................................