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Question 1 of 22
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An operator is collecting a water sample for free chlorine and pH testing at a public pool. Which sampling practice best represents the water the bathers are actually in?
A
Dip the sample out of the skimmer basket, since all the water passes through there
B
Push the inverted tube to about elbow depth away from return inlets and skimmers, then let it fill, holding the tube near the top
C
Skim the sample off the surface directly in front of a return inlet
D
Reach over from the deck and fill the tube at the waterline beside the shallow-end steps