Question 2002 of 234 · California Wastewater Operator Exam
Which test should be run on a grab sample rather than a composite sample?
Exactly one answer is correct.
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Correct answer to question 2002
- B: Dissolved oxygen
Explanation
Parameters that change quickly after collection, such as dissolved oxygen, pH, temperature and chlorine residual, must be tested at once on a grab sample. Composite sampling suits BOD, TSS and nutrients.
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