Life cycle costs are the sum of the present values of-
(a) Investment costs, less salvage values at the end of the study period;(b) Non-fuel operation and maintenance costs:(c) Replacement costs less salvage costs of replaced building systems; and(d) Energy and/or water costs.
10 C.F.R. §436.19
55 FR 48220, Nov. 20, 1990, as amended at 61 FR 32651, June 25, 1996