The Collection and Assessment of Water Found On-Site

Groundwater samples are retrieved and analysed for various purposes, serving essential roles in both construction and environmental assessments. These purposes include:

• Construction-related assessments, which are conducted to evaluate groundwater aggressiveness, particularly in relation to its impact on buried concrete and the potential corrosive effects on metals.
• Geoenvironmental investigations, aimed at identifying the presence of groundwater contamination that may affect the site and surrounding environment.

It’s important to note that water samples collected from trial pits and boreholes during the excavation process may not always represent an accurate snapshot of groundwater quality. This is because the disturbance caused by exploration methods can temporarily alter the composition of the groundwater.

However, these initial samples still provide valuable preliminary data. This data helps in designing more comprehensive and reliable groundwater monitoring programs.

In cases where water has been introduced into the borehole to facilitate drilling, a process called bailing is employed. The borehole is bailed out to allow natural groundwater to enter before any sampling occurs.

Once the groundwater has stabilized, samples are carefully collected in clean bottles, typically with a 1-liter capacity. This ensures the quality and accuracy of the samples for subsequent testing and analysis.