In the fouling response for solid stool or vomit, which option correctly states the recommended free available chlorine (FAC) level and pH maintenance time?

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Multiple Choice

In the fouling response for solid stool or vomit, which option correctly states the recommended free available chlorine (FAC) level and pH maintenance time?

Disinfection after solid stool or vomit works best when the chlorine is strong enough and the pH is kept favorable for the most effective form of chlorine. Keeping free available chlorine around 2 mg/L and maintaining a pH of 7.5 or lower ensures hypochlorous acid is the dominant species, which disinfects more efficiently than when the pH is higher. A contact time of about 25 to 30 minutes provides sufficient exposure for pathogens in organic matter to be inactivated. Higher pH or lower chlorine reduces effectiveness, while applying a much higher chlorine level with a longer than necessary contact time isn’t aligned with standard guidance.

Disinfection after solid stool or vomit works best when the chlorine is strong enough and the pH is kept favorable for the most effective form of chlorine. Keeping free available chlorine around 2 mg/L and maintaining a pH of 7.5 or lower ensures hypochlorous acid is the dominant species, which disinfects more efficiently than when the pH is higher. A contact time of about 25 to 30 minutes provides sufficient exposure for pathogens in organic matter to be inactivated. Higher pH or lower chlorine reduces effectiveness, while applying a much higher chlorine level with a longer than necessary contact time isn’t aligned with standard guidance.

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