An Evaluation of NEPTUNE - A Program for Estimating Life-Cycle Cost of Oily Waste/Waste Oil Collection, Transportation and Treatment Systems.
EG AND G WASHINGTON ANALYTICAL SERVICES CENTER INC RIVERDALE MD APPLIED SCIENCES DEPT
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This report describes the results of an evaluation of NEPTUNE, a computer based model designed to estimate life-cycle costs for oily wastewaste oil collection, transfer, treatment and disposal system. We have found that the program can meet its stated goal of 25 percent relative accuracy, and can also be a valuable aid in identifying oily waste sources. It was determined that a formal error propagation analysis, omitted during program development, would provide helpful data to the user and indicate the likely confidence levels of the estimates. the principal recommendation of this report is that this be completed and that new tables for error terms be incorporated into the model. The procedure used to determine the regression relationships ignored the issue of the weight of the points. In some cases, therefore, the smaller values of cost or effluent volume were fitted better while in other cases the larger values were fitted better. The correct procedure would be to assign a priori weights to the data according to their anticipated frequency in the estimation case description.
- Administration and Management
- Computer Programming and Software
- Water Pollution and Control