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Options & Tools Available in Addressing Historical Site Contamination Issues

Once You Have Documented Your Property Is Contaminated, What Are Your Options?

Once you receive thatPhase II Investigationreport that shows your property has some contamination issues, don’t panic yet.

每个人都听到了关于在清理半个世纪前的清理现场污染的恐怖故事。幸运的是,我们在了解环境中的理解行为,命运和运输中,我们已经走了很长的路。此外,现场清理决策几乎完全是基于风险的,意思是污染的土壤不需要修复背景条件,地下水并不总是需要治疗饮用水标准。

In Texas, most contaminated sites are subject to the technical regulations under the德克萨斯州风险减少计划(TRRP)or thePetroleum Storage Tank (PST)规则。这两个方案都以务实的方式演变,依赖于评估个体暴露途径并仅需要对人类或生态受体的不可接受风险的途径进行反应作用。

这里有些例子:

Alternate Cleanup Standards

Under the TRRP, the Texas Commission on Environmental Quality (TCEQ) has provided a number of tools that allow consideration of site-specific factors to better evaluate contaminate fate and transport. For example, Tier 2 cleanup calculations allow for soil parameters specific to the Site area to be used. Tier 3 calculations allow for even greater flexibility using more complicated fate and transport models and site-specific conditions. Chemical-specific cleanup standards can be developed for complex petroleum mixtures using a spreadsheet model that inputs toxicological data for each carbon range present in the mixture.

也许已经可以解决地下水污染的最重要工具是市政设定指定(MSD)。MSDS仅仅是对地下水使用的限制,使受影响的财产下的水不能用于饮用目的。当然,德克萨斯州许多城市环境中的浅地下水不用于饮用目的,并从深井或地表水库获得饮用水,因此MSD简单地规范了已经存在的内容。由于受到表面溢出的受影响地下水的区域是浅(通常是栖息的)轴承单元,因此MSD是具有成本效益的解决方案。MSDS在环境修复竞技场中是独一无二的,因为它们需要当地以及TCEQ并发,并且通常涉及该项目对土地所有者和水井业主的公开会议。对于环境项目而言,这一透明度是不寻常的,但是,利益是显着的,并且可以节省数十万的昂贵地下水补救选择。

Petroleum Storage Tank Program

Cleanups at filling stations are associated with releases of petroleum substances, such as gasoline or diesel fuel, from underground storage tanks (USTs) and/or aboveground storage tanks (ASTs). The most common chemicals of concern (COCs) found at LPST sites are petroleum hydrocarbons such as benzene, toluene, ethylbenzene, and xylene (BTEX), and methyl tert-butyl ether (MTBE).

你知道德克萨斯州有超过26,000辆泄漏坦克事件吗?自20世纪90年代以来,TCEQ泄漏的石油储罐(LPST)计划自20世纪90年代以自20世纪90年代的典型石油碳氢化合物在环境中的表现。结果,我们现在知道天然生物降解是一种非常有效的机制,用于衰减石油羽毛,因此如果没有人体或生态受体受到血液损害的情况,可以减少清理努力。因此,LPST清理专注于环境风险评估(如靠近水井和地表水体),并获得数据以记录羽流稳定并随着时间的推移下降。除了敏感地下水是饮用水的局部含水层外,除了富含含水层的羽流的实际清理很少。

这些只是一些工具和务实的方法,可以让您的受污染部位毁坏您的项目。

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