Abstract
The total dust concentration and the particle size distribution were determined around die sites of demolition associated with the Great Hanshin-Awaji Earthquake, which occurred on January 17, 1995. The total dust concentrations ranged from 0.20 to 0.23 mg/m3, being about 1.2 to 2.2 times that in die non-demolition area, and intermediate particles (2.1-11.0μm) made up a large proportion of the dust. The dust concentrations were not influenced by the weather on the day preceding measurement around the sites of demolition of concrete buildings, whereas the values decreased to about half around die sites of demolition of wooden buildings, nearly the same concentration in the control areas, when it had rained on the previous day. The dust concentrations increased compared with that in an average year but to The degree of die upper limit of die environmental standard (1 hr-value<0.20 mg/m3) . The dust due to the smoke of Mt. Sakurajima in the surrounding areas accounted for a higher proportion of large particles (<11.0>m) than in the earthquake-devastated area. The concentration of respirable dust (<;7.07>m) in a worker engaged in demolition was 4.0 mg/m3, being twice the recommended concentration (2 mg/m3) of the Japan Society for Occupational Health. It was thus considered that workers should use a respiratory protective device.
Key words: airborne particle, Hanshin-Awaji earthquake, demolition, particle size, weather
References
- 1).Health and Welfare Statistics Association. Kokumin Eisei no Doko. Kosei no Shihyo. 1996; 43: 328–34.
- 2).Fults K, Cyr TD, Hickey AJ. The influence of sampling chamber dimensions on aerosol particle size measurement by cascade impactor and twin impinger. J Pharm Pharmacol 1991;43: 726–8. [DOI] [PubMed]
- 3).Kobe Environment Bureau. 1993 Annual Report on the Investigation of Air Pollution. 1993; 35.
- 4).Logan WPD. Mortality in the London fog incident, 1952. Lancet 1953; 1: 336–8. [DOI] [PubMed]
- 5).Mazumdar S, Schimmel H, Higgins ITT. Relation of daily mortality to air pollution: an analysis of 14 London winters, 1958/59-1971/72. Arch Environ Health 1982; 37: 213–20. [DOI] [PubMed]
- 6).Ostro B. A search for a threshold in the relationship of air pollution to mortality: a reanalysis of data on London winters. Environ Health Perspect 1984;58: 397–9. [DOI] [PMC free article] [PubMed]
- 7).Gomez SR, Parker RA, Dosman JA, McDuffie HH. Respiratory health effects of alkali dust in residents near desiccated old wives lake. Arch Environ Health 1992;47: 364–9. [DOI] [PubMed]
- 8).Dockery DW, Pope CA 3rd, Xu X, et al. An association between air pollution and mortality in six U.S. cities. N Engl J Med 1993;329: 1753–9. [DOI] [PubMed]
- 9).Ostro B. The association of air pollution and mortality: examining the case for inference. Arch Environ Health 1993;48: 336–42. [DOI] [PubMed]
- 10).Hefflin BJ, Jalaludin B, McClure E, et al. Surveillance for dust storms and respiratory diseases in Washington State, 1991. Arch Environ Health 1994;49: 170–4. [DOI] [PubMed]
- 11).Schwartz J. Air pollution and hospital admissions for the elderly in Birmingham, Alabama. Am J Epidemiol 1994;139: 589–98. [DOI] [PubMed]
- 12).Brauer M, Dumyahn TS, Spengler JD, Gutschmidt K, Heinrich J, Wichmann HE. Measurement of acidic aerosol species in Eastern Europe: implications for air pollution epidemiology. Environ Health Perspect 1995;103: 482–8. [DOI] [PMC free article] [PubMed]
- 13).Saldiva PHN, Pope CA 3rd, Schwartz J, et al. Air pollution and mortality in elderly people: a time -series study in San Paulo, Brazil. Arch Environ Health 1995;50: 159–63. [DOI] [PubMed]
- 14).Schwartz J, Morris R. Air pollution and hospital admissions for cardiovascular disease in Detroit, Michigan. Am J Epidemiol 1995; 142: 23–35. [DOI] [PubMed]
- 15).Styer P, McMillan N, Gao F, Davis J, Sacks J. Effect of outdoor airborne particulate matter on daily death counts. Environ Health Perspect 1995; 103: 490–7. [DOI] [PMC free article] [PubMed]
- 16).Wakisaka I, Yanagihashi T, Ono M, Hirano S. Health effects of volcanic activities of Mt. Sakurajima in the mortality statistics. J Jpn Soc Air Pollut 1985;20: 120–7.
- 17).Wakisaka I, Yanagihashi T, Tomari T, Ando T. Effects of volcanic activity on the mortality figures for respiratory diseases. Jpn J Hyg 1988;42: 1101–10. [DOI] [PubMed]
- 18).Takemoto S. Effect of volcanic activities of Mt. Unzenfugendake on life and health of children in school. Igaku no Ayumi 1993;l67: 175–6.
- 19).Buist AS, Vollmer WM, Johnson LR, Bernstein RS, McCamant LE. A four-year prospective study of the respiratory effects of volcanic ash from Mt. St. Helens. Am Rev Respir Dis 1986; 133: 526–34. [DOI] [PubMed]
- 20).Japan Society for Occupational Health. Collected statements of reasons for proposing permissible concentration. Tokyo: Japan Industrial Safety and Health Association, 1994.