الفهرس 
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Abstract
Hazardous waste is any discarded substance in which its chemical nature has the potential to cause irreversible damage and severe illness to human health and the environment. This is due to its physical, chemical, biological, or infectious properties, which could be corrosive, toxic, flammable, or reactive. These reasons were behind the urgent need for the existence of hazardous waste management system, which covers different stages of hazardous waste starting from the generator and ends up at the disposal in secured landfills.
The first international environmental conference was held by the United Nations in the Swedish capital in 1972. The main objective of this conference was the management of hazardous waste and the development of a comprehensive system for preserving and protecting the environment through ensuring that no serious damage to the environment might occur. The Egyptian Environmental Protection Law No. 4 of 1994 criminalized the transport and disposal of hazardous waste without a license, and also criminalized the import of hazardous waste from foreign countries. Egypt is considered one of the first Arab and African countries to put laws that restrict the transboundary movement of hazardous waste.
Egypt has witnessed during the last decades a remarkable increase in population density accompanied by a large industrial revolution, especially in the production of organic and chemical materials, and consequently, the volume of hazardous waste resulting from these industrial processes has been increased.
Although there are many ways in which hazardous waste can be disposed of, such as burial in seas and oceans, burning, recycling, and landfilling, some of these methods have resulted in collateral damage to the environment. This damage has proved them as unsuccessful, while others have had a very high financial cost. Industrial companies that produce waste have sought to find out new ways to dispose of this waste. Landfill is one of the best economically and technically safe ways, it minimizes the amount of harmful substances that reaches the environment, reduces the interactions that may occur between them, and also prevents any leakage of waste either to the surface of the soil or to groundwater.
Because hazardous waste landfills, if not controlled efficiently, would be a great source of hazardous pollutants to the surrounding environment, the determination of the suitable location for the construction of the landfill is one of the major awaiting problems particularly for developing countries where industrial revolution is adversely affecting the environment.
Because it has been noticed that Egypt lacks a well-established scientific methodology accompanied with different factors that affecting the site selection decision, therefore, the main objective of this research is to develop a multi-criteria evaluation model for siting hazardous waste landfill. The research is conducted for West Delta region that extends in the governorates of Alexandria, El-Beheira and Matrouh.
The site selection process was carried out using suitability analysis in light of multi-criteria decision analysis, which usually involves the incorporation of a wide range of variables and spatial factors that must be taken into account. According to a specified methodology, criteria for selecting suitable sites has been developed based on comparisons of previous studies and in light of the geographical nature of the specified study area. The criteria have been divided into four basic.