Measurement point Ventilated air parameters ZWILKOP ZW-10preparation concentration,o/oo Concentration, mg/m3 Permissible concentrations as per the Ordinance  of the Minister of Labour and Social Policy of 29 November 2002 on the maximum allowable concentrations and intensity of agents harmful to health in the workplace (Journal of Laws 02.217.1833 as amended) 2-(2-butoxyethoxy)ethanol 2-ethylhexan-1-ol, 2-(2-butoxyethoxy)ethanol 2-ethylhexan-1-ol, EL STEL EL STEL P1-50 m from the water curtain V=0.8-1 m/s t=27.7°C p=1073 hPa 20 below LOQ 0.0203 67 100 160 320 P2-100 m from the water curtain V=0.9-1 m/s t=28.7°C p=1073 hPa 20 0.0043 0.0137 67 100 160 320 P3-20 meters from the gallery exit V=1.4-1.5 m/s t=26.1°C p=1073 hPa 20 0.0040 0.0140 67 100 160 320 Description of denotations contained in Table 1: • V-air flow speed in the gallery • t-air temperature in the gallery • t-air pressure in the gallery • P1, P2, P3-reference measurement points • below LOQ-below limit of quantification • EL (exposure limit): Average weighted value of concentration which, when having an effect on a worker within an 8-hour working day and for an average weekly working time specified in the Labour Code, for the duration of such worker’s working life, should not have an adverse impact on their health or the health of their future generations • STEL (short-term exposure limit): average value of concentration which should not cause adverse changes in a worker’s health if it is present in the workplace for no more than 20 minutes and not more frequently than 2 times during a work shift, at a time interval of not less than 1 hour.

Table 1: Results obtained at measurement points in inclined drift C31, seam 420/1-2.