Attach a small rope to the top bridle of the sampler. As one person feeds the rope, another person should rapidly lower the bottle into the water. It should be lowered one meter below the surface since there may be debris floating on the surface. A mark on the line at 1 meter above the snap would be helpful to sample at a consistent depth. Watch the bubbles rise to the surface as the bottle fills.
Sampler is now full.
Carefully retrieve the water sampler. Carefully remove the sample bottle. Remove the plastic center plug to expose the collecting bottle in the inner chamber. Dip cap into the water in the outer chamber and fill with water. Screw cap onto bottle and remove from the inner cylinder.