How should you proceed with sampling when there is more than one sampling point at a facility for untreated/raw wastewater?

If there is only one ETP that treats and discharges water to CETP or the environment.

Collect samples (grab, composite based on the HRT) from each sampling point to make 1 final sample that goes for testing in the lab.

If there is more than one ETP installed in the facility that treats and discharges the water to CETP or the environment.

Collect samples (grab, composite based on HRT) from each sampling point and test them separately.

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