4.1 This guide provides persons responsible for designing and implementing wastewater sampling programs with a summary of the types of automatic wastewater samplers, discusses the advantages and disadvantages of the different types of samplers and addresses recommended procedures for their use. The field settings are primarily, but not limited to, open channel flows in enclosed (e.g., sewer) systems or open (e.g., streams or open ditches, and sampling pressure lines) systems.
Type | Advantages | Disadvantages |
Manual | Low capital cost | Increased variability due to sample handling |
| Personnel can compensate for various situations | Inconsistency in collection |
| Personnel can document | High cost of labor assuming composite or multiple grab samples are collected |
| Low maintenance | Repetitious and monotonous task for personnel |
| Extra samples can be collected |
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