  Collecting experimental insight into the relativistic particle populations
and emission mechanisms at work within TeV-emitting blazar jets, which are
spatially unresolvable in most bands and have strong beaming factors, is a
daunting task. New observational information has the potential to lead to major
strides in understanding the acceleration site parameters. Detection of
molecular carbon monoxide (CO) in TeV emitting blazars, however, implies the
existence of intrinsic gas, a connection often found in photo-dissociated
region models and numerical simulations. The existence of intrinsic gas within
a blazar could provide a target photon field for Compton up-scattering of
photons to TeV energies by relativistic particles. We investigate the possible
existence of intrinsic gas within the three TeV emitting blazars RGB J0710+591,
W Comae and 1ES 1959+650 which have measurements or upper limits on molecular
CO line luminosity using an independent technique which is based on the
spectral analysis of soft X-rays. Evidence for X-ray absorption by additional
gas beyond that measured within the Milky Way is searched for in Swift X-ray
Telescope (XRT) data between 0.3 and 10 keV. Without complementary information
from another measurement, additional absorption could be misinterpreted as an
intrinsically curved X-ray spectrum since both models can frequently fit the
soft X-ray data. After breaking this degeneracy, we do not find evidence for
intrinsically curved spectra for any of the three blazars. Moreover, no
evidence for intrinsic gas is evident for RGB J0710+591 and W Comae, while the
1ES 1959+650 XRT data support the existence of intrinsic gas with a column
density of $\sim1\times10^{21}$cm$^{-2}$.
