Consider the following statements regarding excreta disposal without water carriage system: 1. Pit-Privy is a pit in the ground with the toilet seat located directly over it. 2. Bore-Hole Latrines do not cause nuisance due to flies and odour. 3. Aqua-Privy works on the same principle as a septic tank. 4. In the context of a Bore-Hole Latrine, a pit of about 30 cm to 40 cm diameter is dug to a depth of 4 m to 8 m. Which of the above statements are correct? Correct Answer 1, 2, 3 and 4 Pit Privy Latrine: The pit privy consists of a hand-dug hole in the ground covered with either a squatting plate or a slab provided with riser and seat. A superstructure or house is then built around it. The function of the pit is to isolate and store human excrete in such a way that no harmful bacteria can be carried there from to a new host. The depth is usually about 5 m but some pits have been due to a depth of 4 m to 8 m in soils which are very stable. Bore- Hole Latrine: The borehole latrine is an (emergency) excreta disposal system where a borehole (typically 5-10 m deep, 40 cm in diameter) is combined with a slab and a superstructure. It is an alternative to pit or trench latrines where ground conditions allow it and tools and labour is immediately available locally. A lid on the drop hole keeps light out of the pit and helps to stop flies and odours entering the toilet's superstructure. Aqua-privy: An aqua-privy has a watertight tank immediately under the latrine floor. Excreta drop directly into the tank through a pipe. The bottom of the pipe is submerged in the liquid in the tank, forming a water seal to prevent escape of flies, mosquitoes and smell. The tank functions like a septic tank. Effluent infiltrates into the ground through a soak pit.