  We examine galactic chemical evolution models which reproduce the present-day
and pre-solar values of deuterium starting with a primordial value which is
consistent with a baryon-to-photon ratio of $3 \times 10^{-10}$. We consider
various galactic chemical evolution models to determine the viability of
significant deuterium destruction and which provide a consistent age of the
galaxy at the time of the formation of the solar system and consequently its
present day age from nuclear chronometers. These models generally require some
amount of infall which we take with rates proportional to the gas mass as well
as exponentially decreasing rates and some initial disk enrichment which we
limit to the range of 0\% to 30\%. We present those models which give the
observed pre-solar value and present-day value of D/H and which lead to a
present-day gas fraction of $\sigma = .05\quad - \quad .2$. These models result
in a braod range for the age of galaxy between $9.8 - 21.6$ Gyrs.
