This study aimed to assess the bioremediation of soils polluted with fuel oil 6 (FO6) using diffuse reflectance (DR) spectroscopy in the visible and near infrared (Vis-NIR) electromagnetic spectrum. To achieve our goal. we determined the spectral signature of fuel oil 6 (FO6). developed a calibration model to quantify the total petroleum hydrocarbons (TPH). https://yeswellneses.shop/product-category/chamomile/