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首页> 外文期刊>International Journal of Environmental Research and Public Health >Risk-Based Evaluation of Total Petroleum Hydrocarbons in Vapor Intrusion Studies
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Risk-Based Evaluation of Total Petroleum Hydrocarbons in Vapor Intrusion Studies

机译：油气入侵研究中基于风险的总石油烃评估

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This paper presents a quantitative method for the risk-based evaluation of Total Petroleum Hydrocarbons (TPH) in vapor intrusion investigations. Vapors from petroleum fuels are characterized by a complex mixture of aliphatic and, to a lesser extent, aromatic compounds. These compounds can be measured and described in terms of TPH carbon ranges. Toxicity factors published by USEPA and other parties allow development of risk-based, air and soil vapor screening levels for each carbon range in the same manner as done for individual compounds such as benzene. The relative, carbon range makeup of petroleum vapors can be used to develop weighted, site-specific or generic screening levels for TPH. At some critical ratio of TPH to a targeted, individual compound, the overwhelming proportion of TPH will drive vapor intrusion risk over the individual compound. This is particularly true for vapors associated with diesel and other middle distillate fuels, but can also be the case for low-benzene gasolines or even for high-benzene gasolines if an adequately conservative, target risk is not applied to individually targeted chemicals. This necessitates a re-evaluation of the reliance on benzene and other individual compounds as a stand-alone tool to evaluate vapor intrusion risk associated with petroleum.
机译：本文提出了一种定量方法，用于在蒸汽入侵调查中基于风险的总石油烃（TPH）评价。石油燃料产生的蒸气的特征是脂肪族化合物和少量芳香族化合物的复杂混合物。可以根据TPH碳范围来测量和描述这些化合物。由USEPA和其他机构发布的毒性因素允许以与对每种化合物（如苯）相同的方式，针对每个碳范围开发基于风险的空气和土壤蒸气筛查水平。可以使用石油蒸气的相对碳范围组成来确定TPH的加权，现场特定或通用筛选水平。在TPH与目标化合物的某些临界比率下，TPH的绝大多数将导致在单个化合物上的蒸气入侵风险。对于与柴油和其他中间馏分燃料相关的蒸气而言，尤其如此，但如果未对个别目标化学品施加足够保守的目标风险，则低苯汽油甚至高苯汽油也可能如此。这就需要重新评估对苯和其他单个化合物的依赖，以此作为评估与石油有关的蒸气入侵风险的独立工具。

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