**Wioletta Rogula-Kozłowska 1, Karolina Bralewska 1,\* and Izabela Jureczko <sup>2</sup>**


Received: 9 April 2020; Accepted: 4 May 2020; Published: 6 May 2020

**Abstract:** The aim of this study was to evaluate benzene, toluene, ethylbenzene, xylene, and styrene (BTEXS) concentrations in the changing room and garage in a fire station located in the Upper Silesian agglomeration (Poland), to compare them with the concentrations of the same compounds in the atmospheric air (outdoor background) and to assess the health exposure to BTEXS among firefighters and office workers in this unit. BTEXS samples were collected during the winter of 2018 in parallel in the garage, in the changing room, and outside, using sorption tubes filled with activated carbon. The average total BTEXS concentrations in the changing room and garage were over six times higher than those in the atmospheric air in the vicinity of the fire station. At each sampling site, toluene and benzene had the highest concentrations. According to the diagnostic indicators, the combustion of various materials and fuels was the source of BTEXS inside, while outside, the sources were the combustion of fuels and industrial activity. The carcinogenic risk related to benzene inhalation by the firefighters and office employees in the monitored unit exceeded the acceptable risk level value of 7.8 <sup>×</sup> <sup>10</sup>−<sup>6</sup> per 1 <sup>μ</sup>g/m3 by more than 20 times.

**Keywords:** BTEXS; health exposure; occupational risk; markers of exposure; air quality
