How do you handle temperature change during data collection given that the virus is sensitive to temperature?

The operators of the WWTP sampled a 24h flow-dependent composite sample of 250 mL that was stored at 4°C during sampling. A study done by Gundy et al. (2009) over the survival of coronaviruses in water and wastewater showed that coronaviruses are inactivated faster in water at 23°C (10 days) than in water at 4°C (>100 days).