I see the DEQ has developed a generic action level for arsenic in surface soil (0-2 deep), but what is the arsenic cleanup level for subsurface soil (>2 deep)?
DEQ has used an excavation scenario like that included in Montana’s Risk-Based Corrective Action Guidance for Petroleum Releases to calculate a level of arsenic of 300 mg/kg in subsurface soil that is protective of typical construction/utility workers. This level may be appropriate for use at facilities where it can be demonstrated that groundwater is not being impacted by arsenic. A site-specific risk analysis, including site-specific bioavailability evaluation, may be appropriate for some facilities.
Related Questions
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