This paper describes the results of

This paper describes the results of a study conducted to assess the stability of a hazardous solid waste landfill resting on sloping ground. The base profile of the landfill was governed by the bedrock level which was at a shallow depth below the ground surface and exhibited significant elevation difference from one end to the other. The initial studies showed that the base inclination caused by the elevation difference results in planar failure through waste mass and lining system when smooth geomembrane is present in the lining system. As a consequence, an earthen berm was provided at the toe of the landfill and textured geomembrane in the lining system for stabilization. The stability was evaluated for five different rotational and translational failure slip surfaces for conditions of dry and wet waste mass, leachate head, and earthquake. The results show that the two stabilization measures generate satisfactory values of factor of safety for all conditions of analysis.