  We investigate the electronic structure of Ca$_{1-x}$Sr$_x$VO$_3$ using
photoemission spectroscopy. Core level spectra establish an electronic phase
separation at the surface, leading to distinctly different surface electronic
structure compared to the bulk. Analysis of the photoemission spectra of this
system allowed us to separate the surface and bulk contributions. These results
help us to understand properties related to two vastly differing energy-scales,
namely the low energy-scale of thermal excitations (~$k_{B}T$) and the
high-energy scale related to Coulomb and other electronic interactions.
