Remediation
Remediation can vary greatly based on the soil type, volume and depth of contamination, the depth to groundwater, and the proximity to structures such as homes, detached garages, decks, and swimming pools. These factors can affect the complexity of the project, potentially enough to make excavation a poor choice for remediation. They will also affect how quickly or slowly the remediation can be completed. Our team will make sure that the best method of remediation is selected for both your site conditions and your personal preferences.
Excavation is typically the fastest way to complete a remediation, but it can be very disruptive to the property. When the volume of contaminated soil is limited, the excavation can be completed quickly, sometimes as fast as in one day. If groundwater is encountered during excavation, it is either extracted and either disposed or treated on site. This helps keep the excavation dry and flushes out groundwater contamination. If the excavation is located close to a structure, support in the form of helical piers or steel beams may be used to ensure that the home remains safe and does not shift once the soils supporting its weight are disturbed. These excavation sites are more time consuming. GeoWorx contracts licensed structural engineers to generate structural support plans in these instances.
In situ remediation is sometimes selected as a remediation method when the area of impact is large and near structures, and the cost of excavation is prohibitive. In situ remediation is sometimes preferred by homeowners who do not wish to have significant disruption to the property. Chemical or biological injections are performed in semi-permanent flush mounted injection points throughout the impacted area. These injections are done on a regular schedule, and periodic sampling is performed until contamination has decreased to below the NJDEP soil and groundwater standards. These projects can sometimes take between one and five years to complete.