Adam,

I don't know about Voronkov, but my relatives were in the Abazovka colony near Balta and later lived in Olgopol and other towns in Podolia, Kiev, and Taurida guberniyas.
Many retained their registration as farmers in the colony, perhaps because it cost money to re-register and there was no incentive to do it. Did the passport say he was registered in the colony?
As a farmer? If so, he could have gone >from the colony to Voronkov and then to Olgopol. There seems to have been more mobility in those days than is often thought.

Which colony was Meir-Leib in?

Alan Shuchat
Newton, MA

SHUCHAT (Talnoye, Simferopol, Sevastopol, Odessa, Balta (Abazovka),
Tavrig, Pogrebishche)
VINOKUR (Talnoye), KURIS (Mogilev-Podolskiy, Ataki, Berdichev)
SILVERMAN (Soroki, Kremenets), BIRNBAUM (Kamenets-Podolskiy)
KITAIGORODSKI (Zvenigorodka)