A grease trap for separating waste from wastewater includes a tank having an outer wall, bottom and open top. An inlet invert in the tank receives incoming wastewater, and an outlet invert removes water from the tank. The tank has a cover on the open top, and the cover has a hatch. A barrier spans a diameter of the open top below the cover and has an opening vertically below the hatch. A divider divides the tank into an upper chamber and a lower chamber and has a hole for allowing FOG into the upper chamber from the lower chamber, the hole being colinearly aligned with the hatch and the opening in the barrier.