char führ er ▁Fritz ▁J irm ann ▁( I rm ann ) ▁standing ▁at ▁the ▁pod ium ▁with ▁a ▁loud spe aker , ▁and ▁were ▁told ▁by ▁the ▁Son der k omm ando ▁men ▁that ▁they ▁had ▁arrived ▁at ▁a ▁trans it ▁camp . ▁To ▁ready ▁themselves ▁for ▁the ▁commun al ▁show er , ▁women ▁and ▁children ▁were ▁separated ▁from ▁men . ▁The ▁dis ro bed ▁new ▁arrival s ▁were ▁forced ▁to ▁run ▁along ▁a ▁f enced - off ▁path ▁to ▁the ▁gas ▁ch amb ers , ▁leaving ▁them ▁no ▁time ▁to ▁abs orb ▁where ▁they ▁were . ▁The ▁process ▁was ▁conducted ▁as ▁quickly ▁as ▁possible ▁amid ▁constant ▁sc ream ing ▁by ▁the ▁Germ ans . ▁At ▁times , ▁a ▁hand ful ▁of ▁Jews ▁were ▁selected ▁at ▁the ▁r amp ▁to ▁perform ▁all ▁the ▁manual ▁work ▁involved ▁with ▁ex termin ation . ▁ ▁The ▁wooden ▁gas ▁ch amb ers — which ▁were ▁built ▁with ▁double ▁walls ▁that ▁were ▁ins ulated ▁by ▁earth ▁pack ed ▁between ▁them — w ere ▁dis gu ised ▁as ▁the ▁show er ▁bar ra cks , ▁so ▁that ▁the ▁vict ims ▁would ▁not ▁real ise ▁the ▁true ▁purpose ▁of ▁the ▁facility . ▁The ▁g ass ing ▁itself , ▁which ▁took ▁about ▁ 3 0 ▁minutes , ▁was ▁conducted ▁by ▁H ack en hol t ▁with ▁the ▁Ukrain ian ▁gu ards ▁and ▁a ▁Jewish ▁a ide . ▁Rem oving ▁the ▁bodies ▁from ▁the ▁gas ▁ch amb ers , ▁b ury ing ▁them , ▁sorting ▁and ▁repair ing ▁the ▁vict ims