The premises concerned must not be located within 500 feet of any other such establishment for which a certificate of occupancy, previously issued, remains in force; any establishment licensed to sell alcohol for on-premises or off-premises consumption under 28-A M.R.S.A. § 601 et seq.; a church, chapel, parish house or other place of worship; or a public library, juvenile shelter, orphanage, public or private school grounds, licensed daycare, public playground or public park. The 500 feet measurement is straight line from the nearest property lines.