Which item is used for collecting water samples from wells, storage tanks, or containers?

• A. A composite sample.
• B. A Cubitainer.
• C. A Bacon Bomb.
• D. A Weighted Bottle Sampler.

Answer: (D)

The main idea here is using a simple, field-ready device designed to collect a grab sample from water sources like wells or storage tanks without disturbing the water or introducing contamination. A weighted bottle sampler is built to be lowered into the source and fill as it sinks to the desired depth or bottom. The weight helps it reach the intended depth quickly and stay in place long enough for a representative sample to be captured, while the bottle’s seal and inert materials protect the sample from exposure to air and from chemical contamination during collection and transport. Because it is self-contained, easy to carry, and does not rely on pumping, it works well for wells, tanks, or other containers where a discrete sample from a specific depth is needed.

The other options aren’t as well suited for the basic sampling task described. A composite sample refers to combining multiple samples into one, which is a sampling strategy rather than a collection device. A Cubitainer is a transport/storage bag used after collection, not the tool used to obtain the sample. A Bacon Bomb is a different, less common sampling device and isn’t the standard choice for routine collection from wells or tanks.