Calculation of Van der Vaals Volume

Is it possible to let Qchem calculate the VDW-Volume from a lebedev/Swig surface grid in PCM calculations? I know that it calculates the VDW surface, but could not find anything about the Volume in the manual.

The isodensity SS(V)PE method (also CMIRS, which uses that code) will print the volume of an isodensity cavity. The PCM code that uses a union of atom-centered spheres does not print the volume.