Remedial investigation

Remedial investigation
The CERCLA process of determining the type and extent of hazardous material contamination at a site.

Remedial Investigation/Feasibility Study (RI/FS)
A series of investigations and studies to identify the types and extent of chemicals of concern at the site and to determine cleanup criteria (Remedial Investigation), ...

Remedial Investigation (RI): An in-depth study designed to gather the data necessary to determine the nature and extent of contamination at a Superfund site, establish the criteria for cleaning up the site, ...

Remedial Investigation
RIA
Regulatory Impact Analysis; Regulatory Impact Assessment ...

Remedial investigation (RI)
Through extensive sampling and laboratory analyses, the RI characterizes the nature and extent of contamination, defines the pathways of migration and measures the degree of contamination in surface water, groundwater, ...

See "Remedial investigation". Gradient The change in a property over a certain distance. For example, lead can accumulate in surface soil near a road due to automobile exhaust.

Based on data collected during the remedial investigations, options for final cleanup actions or remediation are developed and evaluated.

It usually starts as soon as the remedial investigation is underway; together, they are commonly referred to as the "RI/FS". 2.

endangerment assessment A study to determine the nature and extent of contamination at a site on the National Priorities List and the risks posed to public health or the environment. An endangerment assessment supplements a remedial investigation.

EPA or the state conducts the study when a legal action is to be taken to direct potentially responsible parties to clean up a site or pay for it. An endangerment assessment supplements a remedial investigation.

RI/FS Remedial Investigation/Feasibility Study. ROD Record of Decision. runoff That part of precipitation, snow melt, or irrigation water that drains or flows off the land into streams or other surface waters.

See also: Site, Water, Table, Hazard, Concentration