Exposure Assessment Of The Diesel Engine Exhaust Of Workers To Request Occupational Lung Cancer Approved

Jungah SHIN, Korea Workers’ Compensation and Welfare Service, South Korea
KWAG H. 1 , KIM B. 1 , LEE K. 1 , KIM D. 1 , CHOI B. 1

1 Occupational Lung Diseases Institute, Korea Workers’ Compensation and Welfare Service, Incheon, South Korea

This study was conducted to evaluate the occupational exposure of diesel engine exhaust(DE) of workers to request occupational lung cancer approved. DE exposure assessment was undertaken with regard to six cases that were asked to investigate for work related lung cancer to KCOMWEL from January 2013 up to January 2015. The jobs of 6 cases mentioned above were as follows; the unloading of fertilizer, garbage collection, indirect exposure to forklift emissions, fertilizer warehouse management, container transportation at port, and truck and bus driver. The respirable elemental carbon (REC) was used as surrogate exposure metric of DE. The REC was sampled on precleaned quartzfiber filter and then analyzed by thermo-optical carbon analyzer. Among 6 jobs, the fertilizer unloading job using an excavator had the highest REC concentration(52.0㎍/㎥) of long-term personal sample. The personal exposure concentration of fertilizer warehouse management job was 20.8㎍/㎥ and indirect exposure of forklift emissions in the tire industry were 14.7㎍/㎥. The personal exposure concentration of the other tasks except above 3 jobs were below 10㎍/㎥. Based on this study, 6 cases were approved by occupational disease in Korea. The personal exposure data of 6 jobs in this study may not represent job exposure metrics of jobs because of a few sample sizes. It, however, has significant meaning that there was few such kind of the occupational exposure data in Korea until 2012 when DE was classified a human carcinogen by the IARC. The occupational exposure levels of REC can be affected by many factors such as tasks and working methods; the size and ventilation condition of the work space; the year, engine capacity, and emission regulation of vehicles, therefore, there is a need for accumulation of exposure evaluation data in many jobs and tasks to estimate the past exposure level and to evaluate work related lung cancer.