A huge amount of waste is produce during the Oil and gas drilling operation around the world. Managing contaminated site has been a topic of the environmental industry in recent years. Most waste deposited on soils contains a significant amount of polycyclic aromatic hydrocarbon (PAHs). PAHs are environmentally harmful because of their carcinogenic or mutagenic effect on animals and plant. The environment selected for investigation was three areas (Tai, Bomu, & Ogale) in Ogoni land, Rivers State, Nigeria. The concern is related to the sporadic release of crude oil near cultivated land, mangroves, & freshwater swamps. The focus was to detect the risk-derived key analytes, and apply bioremediation techniques to accelerate the development of a wide range of microbes to break down complex contaminants under a good temperature, moisture, and nutrient level. The fate of PAHs in the soil, their toxicity potency, first-order kinetics, and the Health hazards associated were stressed. The results obtained show that Biodegradation Efficiency (BDE) ranges from 14.8 – 83.2 %. Incremental lifetime cancer risk assessment (ILCR) in normal condition for both child and adult were greater than 1. The individual ∑11PAHs toxicity potency reduced at a range of 18.7 to 94.4 % and the half-life of Acenaphthylene was higher with a lower rate constant (k) as regard to the concept of first order kinetics. The method used is less complicated and environmentally friendly.
