Low speed sampling is a method of extracting groundwater samples from wells at low flow rates. Low speed (flow rate controlled between 100-500mL/min, water level drop not exceeding 10cm) can reduce the volatilization of pollutants and the amount of wastewater generated.

G. The O. Samper airbag pump can be paired with low-speed well cleaning mobile applications to improve low flow sampling efficiency, minimize errors, save you time and money, and generate professional and reliable reports.

This technology complies with:

Technical Specifications for Groundwater Environmental Monitoring (HJ164-2020);

Guidelines for Sampling Techniques of Volatile Organic Compounds in Soil and Groundwater of Land Blocks (HJ1019-2019);

Technical Regulations for Collection, Preservation, and Transfer of Land Survey Samples for Key Industry Enterprises.

Technical advantages:

Low speed well flushing and sampling of groundwater is different from traditional well flushing and sampling. Low speed well flushing and sampling is a new method that does not require extracting a large amount of water from the well. Groundwater is pumped at a low flow rate (controlled between 100-500mL/min, with a water level drop not exceeding 10cm) from the well screen, only extracting the sampling area rather than the entire well volume.

This method minimizes the disturbance of water and the impact on the well and surrounding strata during well washing and sampling processes, reducing sample turbidity. Compared with traditional methods, low-speed well flushing and sampling methods for groundwater have the following advantages:

Improving sample quality through low-speed well washing and sampling methods can reduce turbidity and minimize volatilization. Because turbidity no longer interferes with the determination of physical and chemical indicators, there is no need for sample filtration steps, further reducing sampling and analysis costs.

Improve sample accuracy and precision, enabling users to accurately determine the true trend of geochemistry, avoiding unnecessary costs of supervision and repeated sampling to prevent sample contamination.

A simpler and cheaper sampling system, which is more economical and convenient compared to traditional well flushing and sampling with high flow rates.

Extend the service life of the well by reducing sediment movement into the well through low flow rates, prolonging the service life of the well and reducing the need for well maintenance.