A public water system (PWS) must collect total coliform repeat samples within 24-hours of being notified of the positive results unless the state grants an extension due to logistical sample collection problems (40 CFR 141.21(b)(1)). How does EPA define l
There is no regulatory definition of logistical problem. However, the June 29, 1989 Federal Register provides several examples of logistical problems that could prevent a PWS from collecting repeat samples within a 24-hour timeframe. These examples include the laboratories inability to ship empty sample bottles or receive water sample (54 FR 27544, 27554).
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