The results showed 4 important issue is 1). Beautician with knowledge about the substance formaldehyde in the medium by the 43.64 mainly with a positive attitude towards the management of chemicals. The percentage of 56.36 attitude and medium were 43.64 were at little risk per cent 70.91 2) in the areas of work of 39 beautician shops, detected the concentration of ฟอร์มั aldehyde in the air of 33 shop. The 0.00002-0.5710 ppm (such ppm) the concentration does not exceed the standard according to Ministry of interior and OSHA but eat standard of NIOSH. The 19 store, which requires the concentration of formaldehyde in the atmosphere to work no more than 0.016 ppm (PPM) 3) the risk assessment in cancer with concentration was found that such a risk 8.34 beauty in one billion people. To 1.00 in one thousand. The beautician and 30 people. The risk value exceeds the acceptable value of USEPA and when calculating with the maximum concentration showed that the probability of the risk 1.97 beauticians in one hundred million people. To 1.40 in one thousand. The beautician and 31 people. The risk value exceeds the acceptable value of USEPA, which is expected to 1 x 10-6 4). The risk assessment of other than cancer found that the risk value is in the range 0.018 beautician to 13.216 when using the average concentration in computing, which has the 12 beautician. The risk of more than acceptable values and 0.024 to 18.488 when using the maximum concentration in computing, which has the 13 beautician. The risk of more than acceptable values according to the instructions of the USEPA which stated that 1
key words: so, BEA, risk assessment, healthFormaldehyde, Nakhon Si Thammarat
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