Treated

AQUATIC VENUE water that has been contaminated by feces or vomit shall be treated as follows: 1) Check to ensure that the water’s pH is 7.5 or lower and adjust if necessary; 2) Verify and maintain water temperature at 77°F (25°C) or higher; 3) Operate the filtration/RECIRCULATION SYSTEM while the POOL reaches and maintains the proper free CHLORINE concentration during the remediation process; 4) Test the CHLORINE residual at multiple sampling points to ensure the proper free CHLORINE concentration is achieved throughout the POOL for the entire DISINFECTION time; and 5) Use only non-stabilized CHLORINE products to raise the free CHLORINE levels during the remediation.

Many conventional test kits cannot measure FREE AVAILABLE CHLORINE levels up to 20 mg/L. Operators should use, in order of preference, a FAS-DPD titration test kit with or without dilutions using CHLORINE-free water, or use test strips that measure FREE AVAILABLE CHLORINE in a range that includes 20 mg/L. The inactivation time should only be started once testing indicates that the intended FREE CHLORINE level (20 PPM or other FREE CHLORINE concentration based on inactivation time in table above) has been reached in the POOL. FAS-DPD should be used instead of a color comparator DPD test. It is important that the operator use a non-stabilized CHLORINE product when raising the FREE CHLORINE RESIDUAL particularly when raising to high levels such as 40 mg/L. If a stabilized product such as dichlor or trichlor were used, a high level of cyanuric acid would remain in the POOL after the HYPERCHLORINATION process. The cyanuric acid level in POOL water can only be lowered by dilution of POOL water with make-up water. Since CHLORINE products degrade over time, it is not recommended that non-stabilized CHLORINE products be stored in case of a fecal incident. The operator could either purchase a non-stabilized product at a POOL supply store or buy unscented household bleach (sodium hypochlorite) product that has a label indicating it is EPA-REGISTERED for use as a drinking water disinfectant.