Method for placement of a permeable remediation zone in situ

A method for in situ removal of contaminants from flowing groundwater in a volume of soil or aquifer material which comprises:

• (a) installing a series of freeze pipes around the volume which is unfrozen of soil or aquifer material in the path of the flowing groundwater;
• (b) freezing the soil or aquifer material around the volume which is unfrozen so as to temporarily stop flow of groundwater into the volume;
• (c) introducing a treatment composition into the soil or aquifer material within the volume which is unfrozen which facilitates removal of contaminants from the flowing groundwater;
• and
• (d) thawing some of the freeze pipes surrounding the volume which is unfrozen so that the groundwater containing the contaminants will flow through the treatment composition in the volume allowing contaminant removal.

A method for the in situ removal of contaminants from flowing groundwater in soil or aquifer material which comprises:

• (a) installing a series of freeze pipes around a volume which is unfrozen of the soil or aquifer material in the path of the groundwater;
• (b) installing a well in the soil or aquifer material of the volume which is unfrozen between the series of freeze pipes;
• (c) freezing the soil or aquifer material around the volume which is unfrozen so as to temporarily stop the flow of groundwater into the volume;
• (d) removing water from the volume which is unfrozen through the well;
• (e) placing of a treatment composition through the well into the soil or aquifer material which is unfrozen;
• and
• (f) thawing at least some of the freeze pipes so that groundwater containing the contaminants will flow through the porous reactor material in the volume which is unfrozen.

A method of in situ removal of contaminants from flowing groundwater in soil or aquifer material which comprises:

• (a) installing a series of freeze pipes around a volume which is unfrozen of the soil or aquifer material in the path of the groundwater;
• (b) freezing the soil or aquifer material around the volume which is unfrozen to temporarily stop the flow of groundwater into the volume;
• (c) removing soil or aquifer material from the volume which is unfrozen to form a cavity in a path of the groundwater;
• (d) placing of a porous reactor material in the cavity that is in the path of the groundwater in the volume which is unfrozen;
• and
• (e) thawing at least some of the freeze pipes so that groundwater containing contaminants flows through the porous reactor material in the volume which is unfrozen so as to remove the contaminants.

A method of in situ removal of contaminants in a volume of flowing water in a soil or aquifer material which comprises:

• (a) creating a water impervious barrier in the path of the volume of flowing water containing contaminants wherein the volume is unfrozen;
• (b) providing a remediation means as a treatment zone in the soil or aquifer material in the volume which is unfrozen;
• and
• (c) at least partially removing the water impervious barrier, whereby the flowing water moves through the remediation means in the treatment zone which is unfrozen to remove at least some of the contaminants from the flowing water.