3701-31-04 (B)(1)(c) / Minimum disinfection residual provided as required
Critical Chlorine disinfectant residual was less than 1 ppm for the pool. Free chlorine 0 ppm.
Do not operate the pool when the disinfectant residuals are less than what is required. Ensure the chlorine disinfectant residual is at 1 ppm or above prior to placing the pool back into operation.