In heavy rain, the rainfall in a short time particularly large, if a gas station in the oil tank drainage is not timely, a lot of rain will be deposited, penetrate to the bottom of a tank, not only likely to cause corrosion of bottom irrigation, are more likely to cause bottom irrigation water seepage, affect the oil quality and the most serious risks is that the permeable layers will cause bleaching filling accident formation of large buoyancy.
　　New gas stations in the specification for the design of considering the oilcans drift, in irrigation districts should design a full page based, and in each tank (depending on its size) at the bottom of the 2 ~ 3 a cement concrete tank pillow, in the tank pillow pouring concrete fixed on anti drift strip, until the tank down correction after the anti floating steel welded firmly. In the tank area of the back-end design 1~2 wells, a pumping water used for the submersible pump, in order to storm and continuous rainfall in a timely manner in order to eliminate the irrigation water.
　　Two, in order to prevent oil leakage caused by the oil tank when the oil leakage of the thickness should be not less than 5 cm, and in the tank to be supported.
　　, in the pipeline wall tank into the hole at the best design a Z type tube, to avoid pipeline rupture in the float tank, tank accessories damage.
　　Four, to maintain a reasonable tank tank capacity, in the rainy season, as far as possible to maintain the oil in the tank within the scope of safety tank capacity, to prevent excessive buoyancy tank.
　　Five, keep the tank flange sealing good, prevent the tank because of too long immersion time to cause water seepage.
　　Six, in the occurrence of strong precipitation weather, should strengthen the inspection of irrigation area, so that constantly monitor, pay close attention to the soil water content in the irrigation area, in order to quickly make emergency measures.
　　Seven, as has occurred drift irrigation accident, will dig out tank, at the bottom of the tank to concrete pouring full page basis and based on the pillow, after the expiration of the generation of basic maintenance to put oil tank, and anti drift strip fixed tank.