Pt. Katsumata et We. Kastenberg, ON THE IMPACT OF FUTURE LAND-USE ASSUMPTIONS ON RISK ANALYSIS FOR SUPERFUND SITES, Journal of the Air & Waste Management Association [1995], 47(8), 1997, pp. 881-889
In this paper, assumptions regarding future land use as a key uncertai
nty is considered and its impact on risk analysis for contaminated sit
es is assessed. Risks are assessed for two land use scenarios (current
-use industrial and future-use residential) using probabilistic models
that incorporate uncertainty and variability in the exposure paramete
rs. Residual risks are calculated for both industrial and residential
cleanup standards. A Superfund site in northern California is consider
ed. In general, for the unremediated case, the future-use residential
scenarios produce larger risks (I to 3 orders of magnitude) than curre
nt-(continued) use industrial scenarios. For the Superfund site studie
d, the residual risks calculated for the remedy selected was not suffi
ciently protective of future-use residents in that it did not meet U.S
. Environmental Protection Agency (EPA) risk goals, but was protective
of current-use workers, even though the cleanup criteria were based o
n residential use. Alternative risk management practices, such as deed
restrictions, can be used in such cases.