Albert Barnes Commentary Leviticus 4:12

"even the whole bullock shall he carry forth without the camp unto a clean place, where the ashes are poured out, and burn it on wood with fire: where the ashes are poured out shall it be burnt." — Leviticus 4:12 (ASV)

A clean place where the ashes are poured out (see Leviticus 1:16 note). It was a place free from impurities, not like those referred to in Leviticus 14:40 and Leviticus 14:45. The flesh, though it was burned in an ordinary way, and not sent up in the fire of the altar (see Leviticus 1:9 note), was not to be confounded with carrion, but was associated with the remains of the sacrifices. The priests could not eat the flesh of this victim or of that offered for the sin of the congregation, as they ate that of other sin-offerings (Leviticus 6:26). Compare Leviticus 10:17-18, because in these cases they were in the position of offerers (Hebrews 13:11).

The same rule was observed in regard to the meat-offering of the priests (Leviticus 6:23). It was only of the peace-offering that the offerer himself could partake.