Assessment of the level of soil contamination with petroleum hydrocarbons (Using the example of oil-contaminated soils in the Aral Sea region)Rosa Narmanova, Klara Darmaganbet, Gulzat Askarova, Svetlana Kuzhamberdieva and Nurzhan SuleimenovE3S Web Conf., 498 (2024) 03007DOI: https://doi.org/10.1051/e3sconf/202449803007