• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Soil, Sediment and Water >Background Versus Risk-Based Screening Levels - An Examination of Arsenic Background Soil Concentrations in Seven States
【24h】

Background Versus Risk-Based Screening Levels - An Examination of Arsenic Background Soil Concentrations in Seven States

机译：背景与基于风险的筛选水平-对七个州的砷背景土壤浓度进行的检查

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Arsenic is often present in soils naturally or from historical anthropogenic activities. Arsenic is commonly a constituent of potential concern at environmental remediation sites, even where there is no reason to suspect a release. Site risks are frequently driven by arsenic, and risk-based screening levels below background are not uncommon. However, determining whether arsenic concentrations are consistent with background typically requires an extensive background data set. The ability to gain access to representative background locations owned by third parties is problematic at best in any characterization study. Consequently, many sites undergo characterization and potentially remediation for arsenic concentrations in soil that may in reality be representative of background (natural or anthropogenic). This study examines a large soil arsenic background data set to provide insight on typical concentrations of arsenic that are naturally occurring or represent anthropogenic background. Between 1995 and 2001, over 1,600 background soil samples were collected from 189 sites in Kentucky, Maryland, New York, Ohio, Pennsylvania, Virginia, and West Virginia. Samples were collected using strict Quality Assurance/Quality Control procedures under a United States Environmental Protection Agency (USEPA) Superfund Administrative Order on Consent (AOC) and were analyzed by USEPA-approved laboratories. All data were verified and 10% underwent detailed data validation. Arsenic concentrations in samples retained for statistical analysis ranged from 1.1 mg/kg to 89 mg/kg. Data are evaluated by state and by geology and are compared to USEPA and state risk-based screening levels (RBSLs). Some standard background threshold values (BTVs) are derived for each state and distinct geology. The BTVs are greater than RBSLs. This extensive, regional data set should be considered by all stakeholders involved in relevant risk-based decisions related to arsenic in soils. The consideration of this data set and the BTVs may aid in the appropriate identification of arsenic in soils below typical background concentrations. In turn, the use of BTVs may aid in identifying where risks are truly elevated relative to background, and thus where remediation may or may not be appropriate.
机译：砷通常天然存在于土壤中或因人类活动而存在。即使在没有理由怀疑释放的情况下，砷也通常是环境修复场所潜在关注的成分。现场风险通常是由砷引起的，并且低于背景的基于风险的筛查水平并不罕见。但是，确定砷浓度是否与背景一致通常需要广泛的背景数据集。在任何特性研究中，获得第三方拥有的代表性背景位置的能力充其量是有问题的。因此，许多地点都经过表征并可能对土壤中的砷浓度进行了补救，实际上这些砷可以代表本底（自然的或人为的）。这项研究检查了大范围的土壤砷背景数据，以提供对自然存在或代表人为背景的典型砷浓度的深入了解。在1995年至2001年之间，从肯塔基州，马里兰州，纽约州，俄亥俄州，宾夕法尼亚州，弗吉尼亚州和西弗吉尼亚州的189个地点收集了1600多个背景土壤样品。根据美国环境保护局（USEPA）超级基金同意书行政命令（AOC），使用严格的质量保证/质量控制程序收集样品，并由USEPA批准的实验室进行分析。所有数据均已验证，并且10％的数据已进行了详细验证。保留用于统计分析的样品中的砷浓度范围为1.1 mg / kg至89 mg / kg。根据州和地区对数据进行评估，并与USEPA和基于州风险的筛查水平（RBSL）进行比较。对于每个州和不同的地质情况，都会推导出一些标准的背景阈值（BTV）。 BTV大于RBSL。参与与土壤中砷有关的基于风险的相关决策的所有利益相关方都应考虑使用这一广泛的区域数据集。考虑该数据集和BTV可能有助于适当鉴定低于典型背景浓度的土壤中的砷。反过来，使用BTV可以帮助确定相对于背景而言真正提高了风险的地方，以及因此可能适合或可能不适合补救的地方。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号