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Exposure assessment of elemental carbon, polycyclic aromatic hydrocarbons and crystalline silica at the underground excavation sites for top-down construction buildings.
PLoS One. 2020; 15(9):e0239010.Plos

Abstract

Enclosed underground excavation worksite has an environment with poor ventilation and exposure to hazardous substances from diesel engine exhaust and construction materials. The objective of this study was to evaluate the exposure level of elemental carbon (EC), organic carbon (OC), total carbon (TC), polycyclic aromatic hydrocarbons (PAHs), dust and crystalline silica (CS) during underground excavation work for top down construction buildings. Active local air sampling for EC, OC, and TC (n = 105), PAHs (n = 50), dust (n = 34) and CS (n = 34) was conducted from inside and outside the excavator at underground excavation workshop in four different construction sites. EC, OC, TC and CS were sampled with each respirable and total particulates. EC, OC, and TC were collected on quartz-filter and analyzed using the thermal optical transmittance method. PAHs was collected on polytetrafluorethylene filter with XAD-2 and analyzed using liquid chromatography with fluorescence detector. CS and particulates were collected on poly vinyl chloride filter and analyzed using fourier-transform infrared spectroscopy. The geometric mean of respirable EC, OC, TC, total PAHs, respirable dust and respirable CS were 8.69 μg/m3, 34.32 μg/m3, 44.96 μg/m3, 6.818 μg/m3 0.13 mg/m3 and 0.02 mg/m3 from inside the excavator and 33.20 μg/m3, 46.53 μg/m3, 78.21 μg/m3, 3.934 μg/m3, 0.9 mg/m3 and 0.08 mg/m3 from outside the excavator (underground excavation workshop), respectively. The EC and RCS concentration from outside the excavator is significantly higher than that of inside the excavator (p<0.01). The worksite with rock ground, higher vehicle density, blasting and enclosed environments had higher exposure to EC than other sites (p<0.05). There was no significant difference of EC concentration between total and respirable particulates. In top down construction sites, EC concentrations during underground excavation work exceeded recommended exposure limits as 20 μg/m3, accounted for about 50% of the total sample, and the level of concentration of RCS exceeded 1.5 times of occupational exposure limit, 0.05 mg/m3. Efforts are needed to minimize exposure to diesel engine exhaust and silica in underground excavation sites. Management of diesel engine vehicle, supply of fresh air and ventilation and introducing water facilities to create wet environment in underground worksites are strongly suggested.

Authors+Show Affiliations

Work Environment Research Bureau, Occupational Safety and Health Research Institute, Ulsan, Republic of Korea. Department of Occupational Health, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea.Work Environment Research Bureau, Occupational Safety and Health Research Institute, Ulsan, Republic of Korea.Work Environment Research Bureau, Occupational Safety and Health Research Institute, Ulsan, Republic of Korea.Department of Occupational Health, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

32925951

Citation

Park, Hyunhee, et al. "Exposure Assessment of Elemental Carbon, Polycyclic Aromatic Hydrocarbons and Crystalline Silica at the Underground Excavation Sites for Top-down Construction Buildings." PloS One, vol. 15, no. 9, 2020, pp. e0239010.
Park H, Hwang E, Jang M, et al. Exposure assessment of elemental carbon, polycyclic aromatic hydrocarbons and crystalline silica at the underground excavation sites for top-down construction buildings. PLoS One. 2020;15(9):e0239010.
Park, H., Hwang, E., Jang, M., & Yoon, C. (2020). Exposure assessment of elemental carbon, polycyclic aromatic hydrocarbons and crystalline silica at the underground excavation sites for top-down construction buildings. PloS One, 15(9), e0239010. https://doi.org/10.1371/journal.pone.0239010
Park H, et al. Exposure Assessment of Elemental Carbon, Polycyclic Aromatic Hydrocarbons and Crystalline Silica at the Underground Excavation Sites for Top-down Construction Buildings. PLoS One. 2020;15(9):e0239010. PubMed PMID: 32925951.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Exposure assessment of elemental carbon, polycyclic aromatic hydrocarbons and crystalline silica at the underground excavation sites for top-down construction buildings. AU - Park,Hyunhee, AU - Hwang,Eunsong, AU - Jang,Miyeon, AU - Yoon,Chungsik, Y1 - 2020/09/14/ PY - 2020/05/04/received PY - 2020/08/27/accepted PY - 2020/9/14/entrez PY - 2020/9/15/pubmed PY - 2020/11/5/medline SP - e0239010 EP - e0239010 JF - PloS one JO - PLoS One VL - 15 IS - 9 N2 - Enclosed underground excavation worksite has an environment with poor ventilation and exposure to hazardous substances from diesel engine exhaust and construction materials. The objective of this study was to evaluate the exposure level of elemental carbon (EC), organic carbon (OC), total carbon (TC), polycyclic aromatic hydrocarbons (PAHs), dust and crystalline silica (CS) during underground excavation work for top down construction buildings. Active local air sampling for EC, OC, and TC (n = 105), PAHs (n = 50), dust (n = 34) and CS (n = 34) was conducted from inside and outside the excavator at underground excavation workshop in four different construction sites. EC, OC, TC and CS were sampled with each respirable and total particulates. EC, OC, and TC were collected on quartz-filter and analyzed using the thermal optical transmittance method. PAHs was collected on polytetrafluorethylene filter with XAD-2 and analyzed using liquid chromatography with fluorescence detector. CS and particulates were collected on poly vinyl chloride filter and analyzed using fourier-transform infrared spectroscopy. The geometric mean of respirable EC, OC, TC, total PAHs, respirable dust and respirable CS were 8.69 μg/m3, 34.32 μg/m3, 44.96 μg/m3, 6.818 μg/m3 0.13 mg/m3 and 0.02 mg/m3 from inside the excavator and 33.20 μg/m3, 46.53 μg/m3, 78.21 μg/m3, 3.934 μg/m3, 0.9 mg/m3 and 0.08 mg/m3 from outside the excavator (underground excavation workshop), respectively. The EC and RCS concentration from outside the excavator is significantly higher than that of inside the excavator (p<0.01). The worksite with rock ground, higher vehicle density, blasting and enclosed environments had higher exposure to EC than other sites (p<0.05). There was no significant difference of EC concentration between total and respirable particulates. In top down construction sites, EC concentrations during underground excavation work exceeded recommended exposure limits as 20 μg/m3, accounted for about 50% of the total sample, and the level of concentration of RCS exceeded 1.5 times of occupational exposure limit, 0.05 mg/m3. Efforts are needed to minimize exposure to diesel engine exhaust and silica in underground excavation sites. Management of diesel engine vehicle, supply of fresh air and ventilation and introducing water facilities to create wet environment in underground worksites are strongly suggested. SN - 1932-6203 UR - https://www.unboundmedicine.com/medline/citation/32925951/Exposure_assessment_of_elemental_carbon_polycyclic_aromatic_hydrocarbons_and_crystalline_silica_at_the_underground_excavation_sites_for_top_down_construction_buildings_ L2 - https://dx.plos.org/10.1371/journal.pone.0239010 DB - PRIME DP - Unbound Medicine ER -