3701-31-04(D)(6)(a)(4) / Spa free chlorine disinfectant residual shall be above 2 ppm.
Critical Spa free chlorine disinfectant residual was below 2 ppm. Free clorine level was 0 ppm.
Do not operate the spa until the chlorine disinfectant residual is at 2 ppm or above. Correct By: 22-Jul-2015