The only good-ish citation for alcohol content in OJ I could find is https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5421578/ which found 0.16–0.73 g/L ethanol content in OJ (but with low sample size, so...). To 1 sig-fig, ethanol has a density of 0.8 g/cm³, so that comes out to an ABV of 0.02%–0.09%; much lower than 0.5%.