Question 4026 of 223 · California Water Treatment Operator Exam
When collecting a sample from a well, the operator should first
Exactly one answer is correct.
You got of questions right. Here on the question pages nobody remembers which ones you got wrong. The trainer saves your progress and asks the mistakes again until they stick.
Or free: the 10 questions most people get wrong
Show solution
Correct answer to question 4026
- C: run the pump long enough to purge stagnant water from the casing
Explanation
Water that has sat in the casing does not represent the aquifer. Purging gives a more representative sample.
More questions: Laboratory Procedures
- 4028The Standard Methods approved procedure for analyzing a regulated compliance parameter must be followed because
- 4001Which container is required for a routine bacteriological (coliform) sample?
- 4002Why is the sample tap flame-sterilized or disinfected before collecting a bacteriological sample?
- 4003Chain of custody documentation for a sample records
- 4005Free chlorine in a water sample is most often measured in the field with
- 4006A DPD chlorine test must be run immediately after sampling because