If your toilet is overflowing, first shut off the water. The water shut-off valve is located behind the toilet. Turn the valve counter clockwise and you should hear the water stop running. Next insert the plunger in the toilet and begin plunging. You will know that the blockage is clear because the water in the toilet will drain down. To turn the water back on, turn the water shutoff valve clockwise. Let water in the tank fill up and flush.
If the problem persists, repeat the instructions above. Sometimes it takes a few tries to clear the blockage. If that does not work, please inform the Office or the Gatehouse if it is after hours.