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Evaluation of exposure factors to support development of generic recreational reuse scenarios for land reclamation activities

机译:评估暴露因素以支持开发用于土地开垦活动的一般休闲再利用方案

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摘要

Recreational reuse of contaminated lands can be a sustainable and cost-effective approach to address the increasing demand on land availability for community development as well as for ecologically valuable conservation areas. Conservatively, residential exposure defaults are often applied for evaluation of an alternative future land use. A risk-based fit-for-purpose approach is preferred in evaluating contaminated sites for reuse purposes. The consideration of exposure factors relevant to the anticipated land use is an important step in performing these assessments. Data from two time activity databases, the Consolidated Human Activity Database (CHAD) and the American Time Use Survey (ATUS), were analyzed for activities that might occur at recreational sites for two important exposure factors: duration and frequency of site activities. The information in these databases indicated that the majority of doers spent a total time less than 4-6h per day on these activities. Only a very small percentage of the survey populations participated in these recreational activities. Limited information on activity frequency was reported in the two data sets. This analysis supports modification to the duration of activities at recreational reuse sites as compared to residential defaults, and provides a basis for the development of alternate values.
机译:对受污染土地的娱乐性再利用可以是一种可持续的,具有成本效益的方法,以解决社区发展以及具有生态价值的保护区对土地供应的日益增长的需求。保守地讲,住宅暴露缺省值通常用于评估替代的未来土地用途。在评估受污染的场所以进行再利用时,首选基于风险的“适合目的”方法。在进行这些评估时,考虑与预期土地使用相关的暴露因素是重要的一步。分析了两个时间活动数据库(综合人类活动数据库(CHAD)和美国时间使用调查(ATUS))的数据,以了解娱乐场所可能发生的活动,这有两个重要的暴露因素:场所活动的持续时间和频率。这些数据库中的信息表明,大多数行动者每天在这些活动上花费的总时间少于4-6小时。只有极少数的调查人口参加了这些娱乐活动。在两个数据集中报告了有关活动频率的有限信息。与住宅违约相比,该分析支持对休闲再利用场所的活动时间进行修改,并为发展替代价值提供了基础。

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