  We have examined the physics and the experimental feasibility at the AGS of
various kaon decay processes in which the polarization of a muon in the final
state is measured. Valuable information on CP violation, the CKM matrix or new
physics can be obtained with these measurements and therefore they are well
motivated. In particular, models of non-standard CP violation that produce the
baryon asymmetry of the universe could also produce effects observable in these
measurements. Limits from measurements such as the neutron and electron
electric dipole moment, and epsilon-prime over epsilon in neutral kaon decays
do not eliminate all of these models. We have made a more detailed examination
of the measurement of the out of the plane muon polarization in Kmu3 decays.
With our current knowledge of the AGS kaon beams and detector techniques it is
possible to measure this polarization with an error approaching 10**-4. Such an
experiment would be well justified since the sensitivity is well beyond the
current direct experimental limit (5.3 times 10**-3) and the projected
sensitivity (10**-3) of the currently running experiment at KEK in Japan.
