EPA On-line Tools for Site Assessment Calculation
On-Site Models
Fuel Source Model
The fuel source model assumes that there is a "lens" of fuel in contact with the water table.
The fuel is subject to leaching from aquifer recharge, flow through a smear zone and ground water flow
below the lens.
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Fuel Source Model Conceptualization
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The model includes each of these mechanisms of leaching, followed by
one-dimensional transport in the aquifer.
The aquifer model includes advection, dispersion, sorption and
first order loss.
All the intermediate and preliminary calculations needed for using the
On-Site
fuel
(light nonaqueous phase liquid (LNAPL)) source model are self contained in the calculator.
Pulse Source Concentration Model
If contamination concentrations from a fuel can be treated as a constant,
the
On-Site pulse source calculator can be used with a specified concentration.
The calculator is self contained when the source concentration is known, or the
effective solubility
calculator can be used to estimate the aquifer concentration resulting from
a zone that is contaminanted by fuel.
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