Groundwater Monitoring

Groundwater Monitoring Experts:

Groundwater contamination may originate from point sources such as leaking underground storage tanks, poorly managed waste disposal sites, and accidental chemical spills, or from diffuse sources like the application of pesticides and nutrients on agricultural land that seep through the soil into groundwater.

Contaminated groundwater is unsuitable for use and can degrade the quality of surface water and sediments, posing risks to both human and ecological health. When groundwater contamination is detected, immediate actions are necessary to manage acute risks, such as the potential buildup of explosive vapors in subsurface utilities. Removing the source of contamination is crucial for protecting health and the environment. Additional recommended measures include restoring the environmental values of the groundwater and returning its quality to natural background levels.

INTEV specialises in identifying contaminated groundwater through preliminary and detailed assessments. We offer guidance on managing groundwater contamination and determining the necessary remediation measures. Our approach includes a cleanup hierarchy that outlines when restoration to natural background water quality is essential and when cleanup to the maximum extent practicable is acceptable.

FAQs: What People Ask the Most

How often should groundwater be monitored?

Groundwater levels are monitored weekly during pumping seasons and monthly otherwise, with maintaining a consistent record over several years being crucial. It may be more frequent in areas with higher contamination risks or during remediation projects.

Water salinity (EC) is checked monthly during groundwater pumping, whilst water salinity (major salt ions) is assessed once annually, preferably when pumping is inactive.

Regular monitoring ensures timely detection of changes in groundwater quality, allowing for prompt action to protect water resources and human health.

How do you monitor groundwater flow?

Monitoring groundwater flow involves several methods, including:

Installation of monitoring wells – Wells are drilled into the groundwater table to measure water levels over time, providing insights into groundwater flow direction and velocity.
Groundwater velocity sensors – These instruments measure the speed at which groundwater flows through the subsurface, helping understand flow patterns.
Tracer tests – Tracers, such as dyes or isotopes, are introduced into the groundwater to track its movement over time, allowing for the calculation of flow rates and directions.
Geophysical surveys – Techniques like electrical resistivity or ground-penetrating radar are used to map subsurface geology and detect groundwater flow paths.
By using these methods, scientists and hydrogeologists can effectively monitor groundwater flow and better manage water resources.

What is the purpose of groundwater quality monitoring?

It is to assess the chemical, physical, and biological characteristics of groundwater to ensure its safety for human consumption, ecological health, and various other purposes. By regularly monitoring groundwater quality, potential contamination sources can be identified early, allowing for timely remediation efforts to protect public health and the environment.

Why is groundwater hard to monitor and clean?

Groundwater is challenging to monitor and clean due to its slow movement and limited natural cleansing processes. Unlike surface water, groundwater moves slowly, allowing contaminants to persist for extended periods. Additionally, groundwater often lacks the biological, chemical, and physical processes present in surface water that help cleanse it naturally. As a result, cleaning contaminated groundwater requires careful management and intervention to mitigate potential risks to human health and the environment.

For more information contact Paul on 0448 298 485 or email info@integratedenvironmental.com.au