Program VOLCAL is for creating input files, GASRUN.DAT and WORKRUN.DAT, for SOLVGAS and GASWORKS.
   It needs the files GASTHERM.DAT (February 1992 version) and GAS.STO to run.
   VOLCAL.EXE is the executable file, compiled with the Lahey FORTRAN compiler, that is ready to run.
   To run the executable type "VOLCAL", then answer the questions that follow, which are very similar those asked by GEOCAL.
   One difference is that you must specify whether the gas data is in:

     1) mole % for all species
     2) moles for all species
     3) mole % for major gases and
        ppm in condensate for trace elements,
     4) moles for major gases and
        ppm in condensate for trace elements

If you choose option (1) or (2), the major and trace species will be input in the same units.

Options (3) and (4) let you use condensate data for the trace elements.

Options (1) and (3) always normalize the results to one mole of gas, whereas options (2) and
(4) allow you to specify whether or not you want to normalize to one mole of gas.
The remaining questions are essentially identical to those in GEOCAL.