Estimating environmental costs at feasibility study stage by providing a checklist

A project in any case should have a feasibility study and besides justifying the project, it should be able to make the best use of resources. There are costs for all projects which is imposed on the project and this cost should be estimated in the feasibility study of the project. External costs are costs which are imposed on society and the environment but they are not included in the price of the goods or services. This paper presents a new model to estimating the external environmental costs of a project. Therefor, first the potential environmental pollutants will be grouped and justified by the checklist method.Finally, external costs are estimated based on the said checklist using the energy balance sheet and its adjustment coefficients. And by using another checklist to look at external costs that have been counted many times, Subtract or add to the total external costs. Then the private (fixed and variable) costs of the project are taken into account and The cost is minus the total income.This is a kind of cost-benefit analysis, can be used to justify a financially project.