There is an Olchowce (49.34-22.14) 1.5 miles East of Sanok had its own GC Church > at turn of century Sanok was both the administrative and judicial/tax district > Galicia administered by ethnic Poles for Austro-Hungarian Empire.
There is also an Olchowa (49.27-22.17) 8.9 miles SSE of Sanok.
Sanok District Records are probably at Przemysl Archives
http://www.lemko.org/lih/przemysl.htmlState Archive in Przemysl - Contents
http://www.przemysl.ap.gov.pl/ev/zasoby.html