조선소 용접작업 중 오존 및 TVOCs의 노출평가와 사용 호흡보호구의 적합성 = Exposure to Ozone and TVOCs during Shipyard Welding and the Adequacy of RPE

다국어 초록 (Multilingual Abstract)

Objectives: The purpose of this study is to assess the exposure to ozone and total volatile organic compounds (TVOCs) generated during welding work at a shipyard and recommend respiratory protective equipment (RPE) adequate against these hazards.
Method: Ozone was collected for about 30 minutes at two-minutes intervals using a direct reading instrument, specifically an ozone analyzer (Serinus 10, Ecotech, Australia). TVOCs were collected for about 30 minutes at three-minute intervals using a portable GC (Alpha 115, Synspec BV, the Netherlands), and were determined simultaneously by area sampling at the welding plume closest to the welder’s breathing zone. The total measurements were 162 for ozone (CO2 welding 47, TIG 60, stick 55), and 136 for TVOCs (CO2 65, TIG 50, stick 21). Based on these measurements, a literature survey was conducted to assess the adequacy of RPE.
Results: Relative to Korean OEL, measurements above STEL 0.2 ppm were 23.4% for CO2, 63.3% for TIG and 14.5% for stick welding. There were significant differences (p=<0.0001) among welding types. Compared with ACGIH peak exposure of 0.4 ppm for ozone, which is not applied in Korea, CO2 welding exceeded it by 10.6%, TIG by 40.0% and stick by 7.3%. Although it was not feasible to compare them directly since there are no Korean OEL, TVOCs had very high levels similar to the concentrations before moving into a new apartment and about 10-20 times the indoor air quality recommendations for some individual measurements.
Conclusions: As ozone removal RPE has been recommended in welding environments for a long time (Lunau, 1967), this fact was demonstrated based on the results of the on-site work environment measurements (ozone and TVOCs). In conclusion, for all welding at a shipyard, gas/vapor and particulate combination RPE are recommended. If this is not possible, it should at least be present for TIG welding.

참고문헌 (Reference)

1 박명규, "충남지역에 보육시설내의 HCHO, TVOCs 농도분포와 건강영향평가" 한국냄새환경학회 14 (14): 208-215, 2015

2 이명은, "조선소 밀집지역의 휘발성유기화합물 농도분포 특성에 관한 사례 연구" 대한환경공학회 37 (37): 380-386, 2015

3 김건우, "입주전 신축공동주택의 HCHO, VOCs 및 TVOC 오염농도 실태조사에 관한 연구" 한국실내환경학회 5 (5): 158-169, 2008

4 Spear JE, "Welding Fume and Gas Exposure" J.E. Spear Consulting, LLC 2004

5 Korea Occupational Safety and Health Agency, "Technical Guidelines for Selecting Respiratory Protection System for Chemical Handling Workers" KOSHA 2014

6 Golbabaei F, "Risk assessment of exposure to gasses released by welding processes in Iranian National Gas Transmission Piplines Industry" 4 : 6-9, 2012

7 Health and Safety Executive, "Respiratory Protective Equipment at Work -A Practical Guide-"

8 Lunau FW, "Ozone in arc welding" 10 : 175-188, 1967

9 Korea Ministry of Employment and Labor, "Occupational Exposure Limit for Chemical and Physical Hazards, KMEL Notice No. 208-24"

10 Saito H, "Laboratory measurement of hazardous fumes and gases at a point corresponding to breathing zone od welder during a $CO_2$ arc welding" 38 : 69-78, 2000

11 Korea Ministry of Environment(KME), "Indoor Air Quality Management Law" 2016

12 Blunt J, "Health and Safety in Welding and Allied Process" CRC Press 106-110, 2002

13 National Institute for Occupational Safety and Health, "Guide to Industrial Respiratory Protection" Government Printing Office 3-123, 1987

14 American Gas Association(AGA), "Fume and gases"

15 Deutsche Gesetzliche Unfallversicherung(DGUV), "Exposure to Ozone during Welding and Allied Processes, Expert Committee Information Sheet No. 041"

16 Choi KE, "Exposure Assessment of Arc Welders to Welding Fumes and Ozone" 2014

17 "European Standards(EN 529:2005). Respiratory Protective Devices -Recommendations for Selection, Use, Care and Maintenance-Guidance Document"

18 OSHA regulation, "CFR(Code of Federal Regulations) - Respiratory Protection, Title 29, Part 1910.134"

19 Health & Safety Laboratory, "Analysis of Weld- Through Primers -Arc Welding Tests-, HSL Report"

20 Kim HM, "A study of composition to improve weld ability of Inorganic Zinc Shop Primer" Graduate school, Pukyong National University 2008

21 Korea Occupational Safety and Health Agency, "A Survey of Respirators Usage and Efficient Management System of Respirators for Expose to Chemicals" Occupational Safety & Health Research Institute 60-37, 2007

22 American Conference of Governmental Industrial Hygienists (ACGIH), "2017 Threshold Limit Values(TLV$^{(R)}$) for Chemical Substances and Physical Agents & Biological Exposure Indices(BEI$^{(R)}$)" 5-, 2017

23 김재국, "1910~1965 건조물문화재 보수공사의 시공특징에 관한 연구" 한국건축역사학회 15 (15): 77-99, 2006