I don't know about this incident..but in general there is no excuse for an airport not having contingency plans for planes sitting for long hours on tarmac..certainly some porta-potties on the ground, a cleanout of toilets before flight if time allows..some food supplies, water...perhaps some free inflight movies..but sanitation and food and water should come first...an enclosed area outside the plane..either in terminal or outside on tarmac..patrolled by security if necessary...for people to get out and walk, children to get to move ...enclosure must be very tight of course. mg