Health risk assessment of total petroleum hydrocarbon- contaminated soil

• Main Authors: Chia-Chi Yang, 楊佳琦
• Other Authors: Chi-Ming Kao
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/3vmda5

碩士 === 國立中山大學 === 環境工程研究所 === 102 === Petroleum hydrocarbons-contaminated soil and groundwater is a world-wide environmental problem, which results in environmental hazard and human health risk problems. Because petroleum is a complex composition mixture rather than a single compound, health risk assessment for petroleum-hydrocarbon contaminated site is a complicated process. In this study, the human health risks were assessed and calculated following the risk-based corrective action (RBCA) protocol for a total petroleum hydrocarbon (TPH)-contaminated site. This study was conducted on one of the TPH contaminated sites in the south of Taiwan where the health risk calculation, evaluation of the pollution concentrations and health risks on the pollution sites was carried out. Results show that the main on site human health risk was from the soil vapor inhalation, which resulted in 88.8% of the total carcinogenic risk, and the calculated hazard index was 7.11×10-2. The soil ingestion was also a major risk cause, which resulted in 10.1% of the total carcinogenic risk, and the calculated hazard index was 8.1×10-2. The total non-carcinogenic risk (hazard index) was 8.01×10-1, which was less than the acceptable level of 1. This indicates that the total risk caused by the TPH was within the acceptable range. The calculated total risk after 30 years of exposure was 4.40×10-1, which was also less than the acceptable level of 1, and thus, health risk due to the TPH spill can be ignored. Furthermore, the major causes of increased hazard index value include aliphatic components (C8-C10 and C10-C12) and aromatic components (C10-C12). Because TPH is not an acute toxic compound, the calculated health risk via the oil spill is not significant.