Oil spilled polluted soil present around the Gathering Station (GS) pool of the PT. Bumi Siak Pusako – Pertamina Hulu. The presence of the oil may trigger gene mutation in specific bacteria in that area and they become able to produce biosurfactant for degrading the oil. A study aims to obtain the biosurfactant producing bacteria was conducted in April-Mei 2018. Five grams of polluted soil sa…