Groundwater problems aren’t always obvious. In practice, many problems only reveal themselves once you begin to plan work, rip up the ground, or carry out a site investigation. Please be aware of these signs early to save your time and money.
One of the most obvious tell-tale signs is when there is additional water washing into your excavations. Trenches keep filling up or regular seepage with no rain, which is likely indicative of a high water table, poor drains, or ground that has a localised flow path.
Watch out for strange smells (like petrol, chemicals, or even “rotten egg”) and any sheens on top of standing water. Any of these may indicate contamination by fuels, solvents, or leaking, decomposing organic material. Another indicator is if soil or concrete looks stained (dark patches)…or has a rainbow of films on it.
Redevelopment matters from the perspective of historic land use. Over decades, prior industrial yards, garages, and dry cleaners, as well as landfills or agricultural storage areas, often leave behind pollutants that travel through groundwater. For advice on Groundwater Remediation, contact //soilfix.co.uk/services/groundwater-remediation/
In the end, also be careful with project delays due to unsuccessful tests. If the initial sampling indicates high levels of hydrocarbons, metals, or nitrates, additional monitoring and profiling will be necessary to develop a remediation plan.
Have a groundwater professional take a look if any of these signs appear. The more quickly you learn what is going on underground, the better you can plan responsibly and also keep up to code.