The remains of the sin offerings were not to remain in the camp, they were to be disposed of outside the camp. The discarding of the remains was dealt with in Leviticus 4:12, Leviticus 4:21. On this occasion, however, one difference appears: here it is not the duty of the priest to dispose of the remains, but of some other person.
27 And the bull for the sin offering and the goat for the sin offering, whose blood was brought in to make atonement in the Holy Place, shall be carried outside the camp. Their skin and their flesh and their dung shall be burned up with fire.