Groundwater Sampling from Monitoring Wells: With a 35 cm-Thick Aquifer, How Can You Ensure the Sample Comes from the Target Layer?
For an aquifer that is only 35 cm thick, the key issue is not simply whether water can be collected, but whether the sampling position can be precisely controlled within the target layer while avoiding interference between water from the layers above and below.
The AIMOLI AML917 depth-specific static sampler uses a high-precision depth positioning system, with a positioning error controlled within ±1 cm. For an aquifer only 35 cm thick, the sampling inlet can be precisely positioned at the middle of the target layer, reducing the risk of water from the layers above and below mixing into the sample due to sampling-depth deviations.
At the same time, the AML917 uses a depth-specific static sampling method, performing static sampling at the target depth and minimizing water disturbance caused by flow during conventional pumping-based sampling. This is particularly important for thin aquifers, deep monitoring wells, and monitoring projects with high requirements for sample representativeness.
In addition, the AML917 supports simultaneous sampling from up to 5 layers, allowing separate samples to be collected from different target layers and reducing the impact of cross-layer water movement on sample representativeness.
Therefore, for a 35 cm ultra-thin aquifer, the core advantage of the AML917 is not simply “placing the sampler at the specified depth.” Instead, through precise depth positioning + target-layer positioning + static, low-disturbance sampling + simultaneous multi-layer sampling, the AML917 helps ensure that the collected groundwater sample truly comes from the target layer.
