Determination of safe duration of exposure to benzene at public gas stations around diponegoro university semarang, indonesia

Abstract

Benzene in the air can be found from emissions of coal and oil combustion, gas stations, and motor vehicle workshops. This research was descriptive, observational, and cross sectional and aimed to determine safe duration of exposure (Safe Dt) to benzene for officers of the public gas stations around the area of Diponegoro University Semarang. The subjects of this research were 28 officers determined by Slovin formula and proportional random sampling and taken by purposive sampling technique according to the inclusion criteria of the researchers. The variables of this research were animals weight, BSA experimental animals, officers weight, Body Surface Area, officers breathing rate, benzene concentration, Animal Km, Human Km, NOAEL, officers RfC, and Safe Dt.The average concentration was 0.25 ppm and the highest concentration was 2.08 ppm. From the comparison of results and the Threshold Limit Value according to Permenakertrans No.5/MEN/X/2018, there is still a need for efforts to control benzene exposure by companies and governments, such as determining the period of service of officer who refers to the calculation of safe duration of exposure (Safe Dt) to benzene by 2.2 years. In addition, efforts to control benzene exposure can be also performed by providing Personal Protective Equipment (PPE), i.e half mask respirator with an organic vapor cartridge for officers and regular monitoring of benzene exposure in the work environment.

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