Why choose for flux sampling?

Before contaminated sites can get reallocated, the necessary soil investigations and possible remediation efforts need to be executed, in cooperation with the government. In complex cases, this is often accompanied by a long and frustrating process, in which regularly unforeseen costs arise.

More accurate characterization

Soil remediation projects are exceptionally expensive, which makes it imperative to remediate correctly. Remediating too long, too much or too little will lead to a huge waste of resources, which will render redevelopment of contaminated soil a lot more expensive and possibly financially unprofitable. That is why executing the remediation based on accurate data that can also indicate the mobility of contamination is of invaluable importance. Therefore it is crucial to map out clearly the spreading risks of groundwater contamination.

Design remediation plan

In situ measurements of contaminant fluxes deliver essential data that can be used to optimize the design of remediation measures. High flux zones can be indicated and in situ remediation techniques can be dimensioned based on the actual and local pollutant load.

Determine remediation urgencies and priority source zones

Differences in source strength can be determined from the flux results, which localizes the most hazardous sources. This can be put to immediate use in the remediation plan: Which contamination to remediate and which not? Which zones should we focus on first? Which remediation efforts result in the most efficient removal of pollutant loads?

Follow up of remediation efficiency

Besides designing the remediation measures, follow-up of the efficiency of these remediation measures is more accurate as well. This can be done by following the decrease in pollutant load and pollutant flux, typically downstream from the treated source or plume zone.

Monitoring of Natural Decomposition

Pollutant fluxes are very useful to determine the effectiveness of the natural decomposition process, also known as natural attenuation. The natural decomposition or the decrease in pollutant loads can be calculated by the difference in total pollutant load between two cross sections of the contamination plume. Monitoring of decomposition parameters, nutrients and fluxes to subsidiary products also results in highly valuable information.

Risk-based management of contamination

Often it is not realistic, and technically and economically not even possible, to remove all contamination (completely). A risk-based management keeps in mind the actual risks for people and environment. Flux sampling offers a reliable basis for such risk management. The actual mass and speed with which a contamination reaches a receptor, evaluates precisely the risks for this receptor.

Flux sampling offers more certainty!

Compared to concentration measurements flux monitoring offers a lot more certainty and accuracy, both for the land owner as for the government that follows the remediation project. This way money and time will be saved by working more efficiently to create a conceptual site model (CSM), and to create and monitor the remediation measures. Moreover, mass flux trends can be observed, which will help obtain a final statement more quickly and only benefits the project development.

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