1 COMPREHENSIVE REVIEW OF LINER FAILURE UNDER VARIOUS INSTALLATION CONDITIONS B.BINITHA 1 , Dr. G. JANARDHANAN 2 , SHERIN. K. RAHMAN 3 1 M.tech Environmental Engineering, Department of Civil Engineering, Hindustan University, Chennai, India. 2 Associate Professor, Centre for Environmental Management, National Institute of Technical Teachers Training & Research, Chennai, India. 3 Assistant professor, Department of Civil Engineering, Hindustan University, Chennai, India. Email: 1 bbinitha@outlook.com , 2 dr.gjanardhanan@gmail.com , 3 sherinkr@hindustanuniv.ac.in ABSTRACT Landfill has become the easiest and most environmental friendly method of waste disposal. The most important component of a landfill is the insulating liner material which is used in it in order to retard the flow of leachate. However, many researchers have found that the lining system has limited (10-30years) duration. When liner fail, a variety of compounds whose concentration may be above acceptable level spread into the environment. In this study, a comprehensive review of landfill liner and its types of failure under various conditions, consequences and methodology to avoid failures are presented. Keywords: Landfill, leachate, liner, liner failure, geo-membrane. 1. INTRODUCTION 1.1 General Leachate is any liquid which has the extract of soluble or suspended solids through which it has passed. It tends to intrude into the ground water table and pollute the ground water with the contaminants present in it. For the control of intrusion of leachate into the ground water from the solid waste landfills, liners are introduced in the landfills. The liners and closure system of a modern municipal solid waste (MSW) landfill are constructed with layers of materials having dissimilar properties, such as compacted clay or geo-synthetic clay liner, geo-membrane (liquid-barrier), geo-net (drainage layer), geo-textile (filter), and geo-grid (reinforcement). While compacted clay liner or geo-synthetic clay liner and geo-membranes functions effectively as flow barriers to leachate and infiltration, their interface peak and residual friction angles are lower than those of the soil alone. Geo-membranes are often included as a part of the engineered barrier system for modern landfills. 1.2 Landfill Landfill has been developed for the isolation of trash from the surrounding environment. In Tamilnadu the TNPCB (Tamilnadu pollution control board) has categorised the waste to be dumped in the landfill as hazardous waste, inert waste and construction debris in order to reduce the environmental effects. According to TNPCB domestic hazardous, inert waste, construction debris can be landfilled in a secure landfill site. TNPCB has taken initiatives for developing the three sites in Tamilnadu initially. The facilitators for all three sites are Tamilnadu Waste Management Ltd. Table 1: Description of TNPCB approved landfill site (TNPCB) Gummidipoondi Tiruppur Karur Area of the TSDF (acres) 66 3.09 64.5