IN SITU REMEDIATION

Where excavation and ex-situ treatment is not feasible or is too costly due to the presence of buildings, structures or other confinements, in-situ treatment approaches are undertaken. In most cases, a single remediation process will not address the problem of contamination in the ground under structures and buildings. This is because contamination may be present in several forms including vapour, aqueous and free phase, and absorbed to the soil matrix.

ARC Geobac's approach to in-situ remediation is governed by process effectiveness, efficiency and economics. Our many years experience has proven that a multi process approach is often the best. Vapour extraction and air sparging could be combined with bioremediation. In-situ soil washing, which is undertaken using fully biodegradable chemicals, also provides a food source for complimentary bioremediation. Multiphase vacuum remediation methods are effectively used by ARC Geobac to address several phases of contaminant occurrence at the same time. In situ thermal volatilization, chemical oxidation as well as the creation of natural plume controls are also used effectively by ARC Geobac.

ARC Geobac continually reviews its in-situ systems to maintain efficiency by changing the system according to the changes effected in the occurrence and composition of the contaminants. Each of our system methodologies is designed "specifically" for the site under remediation, since "off the shelf" approaches are often less efficient. ARC Geobac always strives for effective remedial approaches with acceptable economics.