Septic tank
In the United States, the 2007 American Housing Survey indicated that about 20 percent of all households rely on septic tanks, and that the overwhelming majority of systems are located in rural (50%) and suburban (47%) areas. Indianapolis is one example of a large city where many of the city's neighborhoods still rely on separate septic systems. In Europe, septic systems are generally limited to rural areas.
WWII RAN Fuel Installation, Edge Hill
The first two tanks were built on the former railway reserve on the north side of Collins Avenue. This land had been leased privately prior to the war and two small buildings were demolished to make way for Tank 2, which lay on the former railway alignment. Tank 1 was constructed on the site of the former Edge Hill railway station. Because these tanks were intended to hold dieseline they were constructed in plate steel, sourced from Broken Hill Pty Ltd. There were significant delays during construction, with correspondence between Queensland Main Roads, Allied Works Council and the Australian Navy revealing the frustration of all concerned in a project that was considered vital to the Allied war effort. Confusion as to where the steel tanks were to be sited, a lack of graders and poor planning hindered construction. Adjacent to tanks 1 and 2 a small pump house was constructed and an underground fuel pipeline was laid from the pump house along the former Cairns-Herberton railway embankment and under the streets of North Cairns to Trinity Wharf.