Al Kharayej and Jabal Thuaileb (Fox Hills), have been incorporated into Lusail as standalone districts. At the time the project was launched, these places were not inhabited. The only standing structures in the area prior to development were an Ooredoo station, a cement factory and three farms, one of which was still in use. Youth would commonly use the area for recreational off-roading and on occasion waste was dumped in its sabkhas (salt flats). Located to the north of the city are a number of abandoned fishing villages. Groundwater quality in the area is poor. On the city's border with the Persian Gulf, the groundwater elevation is 1 meter above sea level and flows east-to-west. Salinity levels are highest on the eastern side, at 40 ppt, compared to a low of 18 ppt in the western section; these levels are too high for consumption or use in agriculture. Because of the groundwater's high salinity, only salt- and drought-tolerant plants grow in this area. A geographic survey found 25 species of plants within city limits; all of which are found abundantly elsewhere on the peninsula. With the exception of dogs and camels kept on a local farm, no mammals were recorded in the area during the initial environmental impact assessment. However, several species of snakes and lizards were found, including the spiny-tailed lizard which is common to Qatar. Nine species of birds were found to occur in the area, particularly in its mudflats. Grass coverage in its mudflat area is less than 30%, with most grass being found in soils with the highest sand content. Districts Lusail has 19 designated districts as part of the city's master plan. They are: Golf District As its name suggests, the main attraction of the Golf District is its 18-hole golf course. Many high-end villas are situated within the golf course's vicinity. The city's education guidelines state that there will be one school occupying upwards of for kindergarten to secondary students. North Residential District Once fully completed, the North Residential District will feature 895 large villas spread over an area of 126 hectares. As part of the city's educational plan, there will be six schools in this district, 4 of which are kindergartens, with the other two accommodating kindergarten to secondary students. Waterfront Residential District High-rise housing units with a panoramic view of Lusail's coastline are under construction here. Two schools are planned for here.