This figure outlines a decision tree for a pit toilet. Has a site evaluation been carried out by a suitably qualified and experienced person? If not, obtain specialist advice. If yes, does the evaluation indicate low use toilet usage? If not, go to another chart. If yes, does the site evaluation indicate prohibition of human waste discharge? If yes, is a pump-out containment system applicable? If there is prohibition of human waste discharge, does the site evaluation indicate any site limitations? Seek specialist advice if this is the case. If not, is the soil depth sufficient for a pit toilet? (Go to another chart if not.) If yes, is groundwater at a depth sufficient for a pit toilet? (Go to another chart if not.) Does experience at the site indicate problems with pit toilets? If so, seek specialist advice; if not, use a standard pit toilet.