Polycyclic Aromatic Hydrocarbon (PAHs) Levels in Treated Spent Engine Oil Contaminated Soil from Automechanic Workshop Site in Wukari, Nigeria. LJSIR [Internet]. 2024 Apr. 23 [cited 2025 Dec. 10];2(1):70-7. Available from: https://lafiascijournals.org.ng/index.php/ljsir/article/view/308