Specialists of the Volga-Kama Interregional Management of Rosprirodnadzor together with the employees of the Ministry of Ecology, the territorial bodies of the GIMS of the Ministry of Emergency Situations of Russia, Rybnadzor went at the coordinates indicated in the complaint. It was established that the depressurization of the oil well of the Pervomayskoye NGDU "Prikamneft" field of PJSC "Tatneft" named after V.D. Shashin occurred. Ecologists took samples of water from the Kama River and soil from the island. The area of the water area where minor rainbow spots are observed is 20x10 meters. The area of the soil where the presence of oil-bearing products is observed was 21x44 meters around the wellheads. Now the spilled oil-containing liquid has been collected in metal containers, the spill site has been treated with absorbents, the operation of the well pump has been stopped. There is no threat of repeated depressurization. Restoration work is planned by the company after the ice break.