CONDITION
Geochemical conditions are keyword blocks which may occur more than once and are used to set up boundary and initial conditions and source terms. In each case, they provide information on the actual concentrations of primary species and minerals needed to carry out a distribution of species calculation. Only after a particular geochemical condition is read and processed is it allocated as a particular boundary or initial condition or as a source term. Geochemical conditions are input via a CONDITION keyword block. The CONDITION string is followed in each case by a label which identifies the condition elsewhere in the input file. Most of the information in a condition block pertains to aqueous and solid phase concentrations. However, certain parameters may be input which apply to the condition as a whole. These are discussed in the following section.