Material between the presampler and the EMB module 0

This note presents an evaluation of the amount of material located between the presampler and the lAr electromagnetic barrel module 0. After a study concerning the level of accuracy to which the material has to be described, the amount of material due to the mother boards and the cables is evaluated. The hardware used in the barrel module 0 in august 2000 test beam is in principle similar to the final setup. So the present computation should hold for the final calorimeter.