[논문]Study on the Short Term Exposure Level (STEL) of the Benzene for the Tank Lorry Truck Drivers during Loading Process

Park Doo Yong

Study on the Short Term Exposure Level (STEL) of the Benzene for the Tank Lorry Truck Drivers during Loading Process 원문보기

International Journal of Safety, v.3 no.1, 2004년, pp.27 - 31

Park Doo Yong (Department of Industrial Health, Graduate School of OSH, Hansung University)

Abstract ▼ AI-Helper

Some of the petroleum products contain benzene which is well known as a confirmed human carcinogen. For example, gasoline products contain benzene ranging up to several percents by weight. High exposures to the benzene and other organic solvents would be likely to occur during intermittent tasks and or processes rather than continuous jobs such as sampling, repair, inspection, and loading/unloading jobs. The work time for these jobs is various. However, most of work time is very short and the representative time interval is 15 minutes. Thus, it is preferable to do exposure assessment for 15 minute time weighted average which is known as a short time exposure level(STEL) by ACGIH rather than for 8-hours TWA. It is particularly significant to the exposure monitoring for benzene since it has been known that the exposure rate plays an important role to provoke the leukemia. Due to the large variations, a number of processes/tasks, the traditional sampling technique for organic solvents with the use of the charcoal and sampling pumps is not appropriate. Limited number of samples can be obtained due to the shortage of sampling pumps. Passive samplers can eliminate these limitations. However, low sampling rates resulted in collection of small amount of the target analysts in the passive samplers. This is originated the nature of passive samplers. Field applications were made with use of passive samplers to compare with the charcoal tube methods for 15 minutes. Gasoline loading processes to the tank lorry trucks at the loading stations in the petroleum products storage area. Good agreements between the results of passive samplers and those of the charcoal tubes were achieved. However, it was found that special cautions were necessary during the analysis at very low concentration levels.

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문제 정의

This study was designed to evaluate the passive samplers for monitoring workers short term exposure. The workers demand was regular and/or irregular self monitoring during their regular and/or inegular tasks.
On the other hand, unloading processes were simply conducted by connecting the flexible pipeline from the tank lorry to the gas station storage tank. Thus, this study was conducted for loading processes at an oil product storage station of a petroleum industry to provide validity and basic information for the use of passive samplers for short term exposure monitoring for the tank lorry truck drivers.

제안 방법

No report has been made for test of the agreement between the right and left sides. In this study, agreements were compared for the concentration levels taken between right and left sides by charcoal and passive samplers respectively. There were no statistical differences between right and left sides by paired t-test (p<0.

대상 데이터

On the both the left and right side of the driver near the shoulder, a pair of charcoal tube and passive sampler was attached. Eleven components were analyzed including benzene, C₅, C₆, C₇, C₈ and MTBE. Airborne concentrations were extremely low compared to the occupational exposure limits, except for benzene and MTBE.
[15] Standard charcoal (SKC Ana- sorb) and personal air sampling pumps(LFS, GilAir sampler, Gilian Instrument, USA) were used for the traditional sampling technique. The 3M badges (OVM #3500 3M) were chosen for this study. Two charcoal tubes and two passive samplers were attached right and left sides in the breathing zone of each driver respectively during loading process.

이론/모형

The flow rate of air sampling pumps was calibrated using the bubble meter. Charcoal and passive samples were analyzed using GC-FID(Model Agilent 6890N, Agilent Technologies, USA). Desorption efficiency was corrected by desorption efficiency tests for each batch.
Sampling and analysis was conducted based on the NIOSH method 1500.[15] Standard charcoal (SKC Ana- sorb) and personal air sampling pumps(LFS, GilAir sampler, Gilian Instrument, USA) were used for the traditional sampling technique. The 3M badges (OVM #3500 3M) were chosen for this study.

참고문헌 (15)

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Amencan Conference of Govemmental Industrial Hygien-ists(ACGIHs), 2003 TVLs and BEIs, ACGIH, 2003
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상세보기
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상세보기
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R.A. Schnatter , M.J. Nicolich, M.G. Bird, 'Determination of leukemogenic benzene exposure concentrations: refined analyses of the Pliofilm cohort', Risk Anal. Vol. 16, pp.833-840, 1996

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Study on the Short Term Exposure Level (STEL) of the Benzene for the Tank Lorry Truck Drivers during Loading Process 원문보기

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Study on the Short Term Exposure Level (STEL) of the Benzene for the Tank Lorry Truck Drivers during Loading Process 원문보기

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