Notes and Assumptions:
1. Based on EPA's estimate that a 10,000 gallon storage fuel tank loses up to 10% of its fuel per year due to evaporation. Gasoline savings: 500 gallons per year x 10 years x $2 per gallon = $10,000
2. Based on US Navy Corrosion protection maintenance and repair costs estimates at $2,800 per year per tank. (Navy Environmental Requirements Guidebook). It is assumed that by using the DSS material, the savings will be equal to 75% of the total annual R&M costs, i.e., $2,100 per year x10 years = $21,000
3. Extension of fuel tank life is estimated to be 5 yrs at savings of $1,000/yr or a total of $5,000. It is assumed that the cost of a new fuel tank is $15,000 and its useful life is 15 years.
4. Other cost savings include emergency welding repairs, cleaning of fuel tanks, insurance premiums, recycling DSS etc. It is estimated that such cost savings are $1,000 per year x 10 yrs= $10,000.