SUMMERS is a screening level interactive computer program for estimating soil cleanup levels. The model assumes that a percentage of rainfall at a polluted site will infiltrate and desorb contaminants from the soil based on equilibrium soil-water partitioning. Using a mass balance approach and assuming equilibrated, complete mixing in the aquifer, the soil cleanup level is calculated from the original soil concentration, the concentration of the infiltrating water, and an equilibrium coefficient.

The public domain SUMMERS model was developed to estimate when contaminant concentrations in the soil will produce aquifer contaminant concentrations above acceptable levels. The resulting soil concentrations can then be used as guidelines in estimating boundaries or extent of soil contamination by applying the derived maximum soil contaminant concentration level to the observed concentration in the soil at the site.

This version of the SUMMERS model has been prepared by IGWMC. It is a menu-driven, interactive code and includes simple error-checking. The DOS-based program produces simple tabular on screen. It is distributed complete with source code, executable image and MathCadŽ application file. The user's manual contains installation procedures and a short notice on the model's theory.

SYSTEM REQUIREMENTS

Intel 80i86 based computer with math coprocessor, 640 Kb RAM, DOS 3.1 or higher.

Developer: P.K.M. van der Heijde (IGWMC).