Calculation of disposal costs may involve a set of tasks. It may be necessary to calculate material flows (an engineering exercise) from the plant's production process so that wastes can be desegregated and tracked. These material flows will then have to be translated into disposal costs. This calculation can be complex. Consider the issues that arise if the waste is destined for landfill disposal. First, there will be marginal disposal costs associated with transport of the waste. Second, the waste's contribution to landfill costs must be calculated. If a third-party landfiller is to be used, costs will include the.