For more information about contaminants on this list reference the Hazardous Substances Data Bank (HSDB) at TOXNET: http://toxnet.nlm.nih.gov

18 AAC 75 Health based ingestion/inhalation level - Alaska Administrative Code – Soil health based cleanup levels. Contaminant concentrations above these levels may pose a risk to human health.

For more information about contaminants on this list reference the Hazardous Substances Data Bank (HSDB) at TOXNET: http://toxnet.nlm.nih.gov

18 AAC 75 Method 2 - Migration to Groundwater - Alaska Administrative Code – Contaminants may leach vertically through soil to underlying groundwater. Migration to groundwater cleanup levels correspond to contaminant concentrations that may be left safely in the soil without reaching groundwater.

Diesel Range Organics (DRO) – A petroleum fraction consisting of numerous individual chemicals found in diesel fuels; the acronym is commonly used to refer to these chemicals.

18 AAC 75 Table C for Groundwater - Alaska Administrative Code - Cleanup levels for groundwater if there is a current use or possible potential future use of groundwater as a drinking water source.

Diesel Range Organics (DRO) – A petroleum fraction consisting of numerous individual chemicals found in diesel fuels; the acronym is commonly used to refer to these chemicals.

18 AAC 75 Table C for Groundwater - Alaska Administrative Code - Cleanup levels for groundwater if there is a current use or possible potential future use of groundwater as a drinking water source.

For more information about contaminants on this list reference the Hazardous Substances Data Bank (HSDB) at TOXNET: http://toxnet.nlm.nih.gov

18 AAC 75 Method 2 - Migration to Groundwater - Alaska Administrative Code – Contaminants may leach vertically through soil to underlying groundwater. Migration to groundwater cleanup levels correspond to contaminant concentrations that may be left safely in the soil without reaching groundwater.

For more information about contaminants on this list reference the Hazardous Substances Data Bank (HSDB) at TOXNET: http://toxnet.nlm.nih.gov

18 AAC 75 Method 2 - Migration to Groundwater - Alaska Administrative Code – Contaminants may leach vertically through soil to underlying groundwater. Migration to groundwater cleanup levels correspond to contaminant concentrations that may be left safely in the soil without reaching groundwater.

For more information about contaminants on this list reference the Hazardous Substances Data Bank (HSDB) at TOXNET: http://toxnet.nlm.nih.gov

18 AAC 75 Method 2 - Migration to Groundwater - Alaska Administrative Code – Contaminants may leach vertically through soil to underlying groundwater. Migration to groundwater cleanup levels correspond to contaminant concentrations that may be left safely in the soil without reaching groundwater.

For more information about contaminants on this list reference the Hazardous Substances Data Bank (HSDB) at TOXNET: http://toxnet.nlm.nih.gov

18 AAC 75 Method 2 - Migration to Groundwater - Alaska Administrative Code – Contaminants may leach vertically through soil to underlying groundwater. Migration to groundwater cleanup levels correspond to contaminant concentrations that may be left safely in the soil without reaching groundwater.

Federal or State Agency GIS Database Note – Federal agencies often agree to track the terms and conditions of a site closure on their own lands. Geographic Information Systems (GIS) are often used for this purpose.

Land Use Plan / Maps / Base Master Plan – Land use plans, maps, and military base master plans are other tools used by agencies to track the terms and conditions of a site closure on their lands.

Institutional Control Management Plan – A plan that is sometimes used for more complicated sites to ensure the terms and conditions of a site closure are met.