DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 3-4/2023 str. 28 <-- 28 --> PDF |
statistical inverse relationship between distance and CO exposure (-0.80**). As the distance increases, the CO exposure decreases. A statistically strong relationship was found between exposure time and exposure at a distance of 0 cm (x2) and 20 cm (x4) to CO gas (x2=0.37** and x4=0.28**), and an inversely insignificant relationship was found between exposure time and exposure at a distances of 10 cm (x3) and 30 cm (x5). In short, although the amount of exposure to CO gas was the lowest at a distance of 0 cm and 20 cm in the first 5 minutes, it was observed to increase with time. Contrary to 0 cm and 20 cm, the statistical results of the trend are different at 10 cm and 30 cm. It can be considered that the measurement at a distance of 10 cm and 30 cm is due to the wind factor (air flow) effect caused by the open air and the sensitivity of the measuring instrument. Generally, chainsaw operators perform work of felling trees in difficult terrain conditions. In the process of felling trees, sometimes operators may approach the chainsaw in a short period of time to enter the breathing zone. There may be high CO exposure limits at that time. Therefore, a large amount of CO exposure detect in a short period of time during the work period in forest. DISCUSSION RASPRAVA In the present study, when 15 minutes of average measurement data were obtained every 10 seconds from a distance of 10 cm, 20 cm and 30 cm, an average CO exposure of 227±5% ppm was observed for short periods of time. When determining the concentration or limit value of CO exposure in the work environment, differences may occur. Due to the wind speed and direction, the posture of the worker, the environmental barriers, the measurement technology, the type of fuel, and engine technologies, CO exposure limits can be different. It is necessary to evaluate the health problems caused by the operator who uses the chainsaw being exposed to CO and other factors (such as noise, vibration, dust and other chemicals) (Golmohammadi and Darvishi 2020). On the other hand, chainsaw operators who use low-standard work safety equipment are more likely to suffer from chronic fatigue than manual hauling workers (Yovi and Yamada 2019). CO exposure, which is another important factor for chronic health problems, needs more attention and comprehensive study. The results of comprehensive evaluation and medical tests can prove the level of impact of the chainsaw operator exposure to CO. Within the scope of this study, we used a low-cost CO meter to perform a 15-minute measurement at a distance of 30 cm and less. The results showed that the operator exposure to CO was higher than the legal limit for short-term exposure (EU 1995). Besides, among the instantaneous measurements are high-level CO exposure measurements, which can be very harmful for human health (Table 4, 5). In measurements made in open area, it was found that the operator could be exposed to higher values close |