  We present a new analysis of the deuterium absorption at z = 2.504 towards
the quasar Q1009+2956 using the mesoturbulent model which accounts for possible
correlations in the large scale velocity field. We obtain a slightly higher
deuterium-to-hydrogen ratio D/H = (3.5 - 5.0)*10^{-5} as compared with the
recent measurement D/H = (3.3 - 4.5)*10^{-5} (68% C.L.) performed by Burles &
Tytler (1998b) using the usual microturbulent approximation which assumes that
the velocity field is uncorrelated. Other mesoturbulent calculations of the
D-abundances at z = 3.572 towards Q1937--1009 and at z = 0.701 towards
Q1718+4807 (the systems showing `low' and possibly `high' D/H values,
respectively, in the microturbulent approaches) agree with the present one
within the errors of measurements. Thus, the mesoturbulent analysis does not
reveal any spatial variations of D/H and supports the standard homogeneous
model of big bang nucleosynthesis.
