Syria is a country situated in semi arid zone and shares surface international water with surrounding countries. Need for water is increasing with time due to the development of agriculture and industries and the standards of life

Oil industries pollute the surface water resources and ground water reservoirs by infiltrating into the ground layers to the aquifers. If this phenomenon continues, it will pollute the surface and ground water resources.

Removing oil from ground water may take a long time, and the rapid reaction to stop oil from infiltrating is very important in order to prevent oil from reaching the aquifers

The decrease of nitrate concentration from (10 mlg/l) to (1 mlg/l) in the surrounding wells of an area of infiltrated oil to the ground water in calcareous rock. In case the amount of infiltrated oil is high, one can use the most known method of extracting oil from ground water table, which consists of local lowering of water table under the area of oil by ground water withdrawal. See fig. (1)

Industrial water coming from oil treatment factory contains higher concentration of substances that can be extracted by ether than the petroleum.

The problem in sewer systems is the degradation of hydraulic head due to presence of oil in the drainage network or other substances that oil facilitate its sedimentation on the pipes, leading to increase the roughness of this pipes and reducing the diameter of the drainage network.

Even if the oil does not affect the internal surfaces of the pipes by increasing the roughness or decreasing the diameter, it makes the entertainment of the network dangerous on health of the persons executing entertainment.

In pumping station of drainage systems, absorption well may be constructed in order to allow sedimentation of big size substances, and the small size substances to float on surface, and because it is rare that the water is pumped, the oil accumulates on the surface causing a big problem, very expensive to solve, for entertainment and cleaning of the pumps.

The oil locks the filters and the pipes of the pumped sludge and causes additional loads on the cleaning equipment, loosing time and money for entertainment.

If oil is not removed from pre-treatment plants, it may reach the biological treatment tanks, and then the filters.

In general, the oil substances increase the time and the budget of treatment plants, then removing it is very necessary.

Oil also may prevent oxygen diffusion resulting in the bad treatment work.

The initial and final sludge resulting in pre-treatment of sewer water containing oil must be removed out of treatment plants. This sludge contains oil substances the drainage to agricultural land is prevented.