The Mi’gmaq community of Listuguj moved their municipal garage operations to new premises and wanted to remediate the site of the old garage. Since a previous study had revealed the presence of certain contaminants in the soil beyond the applicable federal criteria, the community mandated Nvira to carry out additional environmental characterization work to better define the contaminated soil enclaves identified previously.

– Planning and carrying out a complementary environmental characterization
– Determination of site-specific remediation criteria for certain PAHs
– Production of public tender documents and addenda, selection of the contractor
– Supervision of remediation works
– Writing of the report

Total cost of the project: $102,000

Nvira was mandated by the client to initially carry out a environmental site assessment (phase I). This study concluded that the site was exposed to several environmental risks related to its past use. Therefore, an environmental characterization of soils and groundwater was subsequently carried out on the property. Depending on the analytical results obtained and to define the limits of the contaminated soil enclaves, several characterization campaigns were planned and carried out. The environmental remediation work began with the excavation of the surface soils having presented concentrations in accordance with the applicable criteria, by stacking them on waterproof canvases on the site, and by sampling them. Then, based on the analytical results obtained during the characterization studies, the underlying contaminated soils were excavated, loaded directly into trucks, and disposed of off-site.

Total cost of the project: $1,600,000

The team was mandated to carry out an environmental assessment update and additional certified environmental characterization in the context of a closure of a service station. Initially, Nvira was responsible for updating the environmental site assessment (Phase I) previously carried out by a third party, and then carrying out additional environmental characterization work to better define the identified contaminated soil enclaves. Once the analytical results were obtained and interpreted, various environmental remediation scenarios were developed and proposed to the client.

– Planning and carrying out a complementary environmental characterization
– Writing of the characterization report and the scenario and the remediation plan
– Production of tender documents and addenda, selection of the contractor
– Supervision of remediation works
– Remediation report writing

Since the previous studies had revealed the presence of certain contaminants in the soils, our client commissioned us to carry out the evaluation and interpretation of the analytical results made by third parties, then to carry out environmental remediation work on the soils at the same time at the location of ten contaminated soil enclaves identified on the site. Prior to this work, Nvira prepared and submitted to the MELCC a remediation plan for approval, which included the excavation of a part of the contaminated soil and the in-situ treatment of another part.

– 4 stratigraphic boreholes
– 7 injection wells were made and fitted out to allow the injection of oxidants
– 2 series of oxidant injection
– 1 control characterization including the realization of 6 stratigraphic drilling
– Management of 2,360 metric tons of contaminated soil during the works

Duration of work: 1.5 years
Total cost of the project: $365,000

Following the discovery of soils contaminated by petroleum products for a property on which service station activities had taken place, our team was mandated to carry out an environmental remediation of the property’s soils and to write the remediation report.
The remediation works were spread over approximately 4 months considering the technical constraints on site, and it involved the management of approximately 5,000 metric tonnes of contaminated soil.

– Planning and carrying out a complementary environmental characterization
– Production of tender documents and addenda, selection of the contractor
– Realization of remediation works
– Report writing

Total cost of the project: $340,000

Our 24/7 emergency response team quickly took care of decontamination works on a stretch of highway of over 400 meters long following a major oil spill, and therefore limited the impact of such an environmental disaster.

Thanks to the collaboration and proximity with our client and our partners, we were able to carry out the work in less than 24 hours.