Safe consentration of benzene on workers at public gas stations around Diponegoro University Semarang

Benzene is a liquid aromatic hydrocarbon compound that is clear, colorless, flammable, and volatile. This study aims to determine safe concentration of benzene at public gas stations workers around Diponegoro University Semarang. This is descriptive, observational, and cross sectional study. Atotal of 28 workers were then taken as sample. data was taken in from of primary and secondary data, then analyzed manually through calculation of safe concentration of benzene after determination of weight, body surface of experimental animals, body surface area, breathing rate of workers, benzene concentration, Animal Km, Human Km, highest dose of toxin without causing effect, and reference concentration of benzene for workers. The measurentment of average concentration of benzene in the air showed a value of 0,81 mg/m3 (0,25 ppm). This result is lower than benzene threshold limit value according to Ministry of Menpower Regulation Number 5 of 2018 of 0,5 ppm. In contrast, manual calculation of safe for workers. effort to control benzene exposure in work environment are needed to ensureworkers health such as use of Personal Protective Equipment ini form of half mask respirators with organic vapor catridges, consumtion of CYP2E1 enzymes in beef liver and salmon meat, procurement of Golden Photos or Boston plants, and inspection and regular monitoring of benzene exposure biomarkers in work environment