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Response to Letter to the Editor

机译：回复给编辑的信

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Unlike other exposure factors, which are upper bounds, the inhalation rate is a median rate. EPA says "an upper percentile is not recommended" with no reason given. This is inconsistent with the usual RME approach used in Superfund risk assessments, and could result in under-protection of children, the elderly, athletes, asthmatics, and the half of the population with above-average inhalation rates. Due to a tribal desire to protect more than just the average traditional person, we have chosen to round up the value of 26.2 m~3/day to 30 m~3/day. We are continuing to collect data on tribal activities analogous to CHAD categories, and will continue to follow EPA's general HAPEM4 approach. We should note that we are not focusing on a cross-section of tribal members, some of whom have Westernized lifestyles, but specifically on traditional lifeways, subsistence activities, and native diets, which were reserved between the United States and the tribal governments and that continue to be protected by federal law. We believe the real motivation for challenging the tribes' inhalation rate is EPA's concern for setting a precedent for other applications, such as air emissions from the Umatilla Army Chemical Munitions Incinerator (and other point sources affecting tribal lands) and the national tribal air quality rule. EPA's Tribal Consultation Policy requires genuine consultation before changing exposure factors developed by tribal scientists and promulgated through tribal law.
机译：与上限的其他暴露因素不同，吸入率是中位数。 EPA表示“不建议较高百分比”，没有给出任何理由。这与Superfund风险评估中使用的常规RME方法不一致，并且可能导致儿童，老人，运动员，哮喘病患者和一半以上人口的平均吸入率受到保护不足。由于部落希望保护的不仅仅是普通人，我们选择将26.2 m〜3 /天的值取整为30 m〜3 /天。我们将继续收集类似于CHAD类别的部落活动数据，并将继续遵循EPA的一般HAPEM4方法。我们应该注意，我们并没有关注部落成员的横截面，其中有些人具有西化的生活方式，而是特别关注了传统的生活方式，维生活动和当地饮食，这些是美国和部落政府之间保留的，继续受到联邦法律的保护。我们认为，挑战部落吸气率的真正动机是EPA担心为其他应用树立先例，例如，来自Umatilla军用化学弹药焚化炉的空气排放（以及影响部落土地的其他点源）和国家部落的空气质量规定。 EPA的《部落咨询政策》要求真正的咨询，然后才能更改由部落科学家开发并通过部落法律颁布的接触因子。

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