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Comparison of Naphthalene Ambient Air Sampling & Analysis Methods at Former Manufactured Gas Plant (MGP) Remediation Sites

机译:以前的天然气工厂(MGP)修复场所的萘环境空气采样比较和分析方法

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Naphthalene is a contaminant of concern at former Manufactured Gas Plant (MGP) and other property redevelopment sites across the country. A major component of coal tar waste and a possible human carcinogen (EPA Group C), naphthalene is a chemical that may adversely affect human health at remediation sites. Due to its boiling point and vapor pressure, naphthalene can exhibit both volatile and semi-volatile characteristics; therefore the question can arise as to how to properly measure naphthalene in ambient air. Two commonly applied methods of measuring vapor phase naphthalene include EPA Method TO-15, which utilizes whole air sampling in passivated stainless steel canisters; and EPA Method TO-13A, which utilizes high volume sorbent based sampling with polyurethane foam/XAD resin cartridges. Analytical differences between these two methods will be discussed, keeping reference to naphthalene’s unique chemical & physical properties. This case study will present weekly data spanning a twelve month period (December 2006 – December 2007) from co-located EPA Method TO-15 and TO-13A ambient air samples at the perimeter of two MGP cleanup remediation sites. Distinct trends are noted and discussed in this paper when comparing the concentration results from the two methods.
机译:萘是前全国的人造煤气工厂(MGP)和其他物业重建场所的关注污染物。萘是煤焦油废物和可能的人类致癌物(EPA组C)的主要成分,是一种化学物质,可能对修复现场的人类健康产生不利影响。由于其沸点和蒸气压,萘可同时显示出挥发性和半挥发性。因此,可能出现如何正确测量环境空气中萘的问题。两种常用的测量气相萘的方法包括EPA方法TO-15,该方法利用钝化的不锈钢罐中的全部空气采样。 EPA方法TO-13A,利用聚氨酯泡沫/ XAD树脂药筒进行基于大体积吸附剂的采样。将讨论这两种方法之间的分析差异,同时参考萘的独特化学和物理性质。本案例研究将提供来自两个MGP清理场地周边的EPA方法TO-15和TO-13A环境空气样本共十二个月(2006年12月至2007年12月)的每周数据。比较两种方法的浓度结果时,本文会指出并讨论明显的趋势。

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