A method and system for remediating a wellbore

The system of 3, wherein the series of gaseous contaminant filter modules are arranged in two or more releasably connected filter banks.

The system of 4, wherein the multi-stage filtering provided by the series of gaseous contaminant filter modules involves four filtration stages.

A method for contaminant extraction from a contaminated region of a borehole including a production pipe extending from a surface of the earth through a water permeable layer and into an underlying production zone, the method comprising:

• providing a side remediation borehole located proximate the borehole and extending through the water permeable layer towards the production zone, the side remediation borehole including a remediation pipe;
• coupling a vacuum source to the side remediation borehole, the vacuum source being configured to extract gaseous contaminants from the side remediation borehole and the region of the borehole.