Groundwater under surveillance
In June, Bagotville Environmental Bureau ( BEB) began its annual groundwater sampling campaign. Two hundred and fifty- two wells were dug on the base and 152 will be sampled this summer. These surveys have been conducted once or twice a year in the spring and / or fall since 1992. Once the sampling is completed, the filled bottles are transported to an external laboratory for analysis. How the sample will be analyzed is determined by what pollutants are potentially present in the area. Depending on past or cur- rent activities in each sector, the analyzes may involve different chemicals that are suspected of being present. During the various sampling campaigns, the analyzes carried out made it possible to improve the procedures for using certain products on the base. For example, the use of urea was eliminated on the runways during the 1990s to protect the water table from contamination. If contaminants are detected, measures will be taken to correct the situation by filtering water using different materials, such as activated carbon filtration.