3701-31-04 (D)(8) / Acceptable test kit provided/adequate/in good repair
Observed chlorine level at 10.5 your test kit measures to only 5 ppm.
To reduce potential health hazard- Obtain a test kit that can accurately indicate the water quality of the swimming pool. PIC to lower chlorine levels to 1-5 ppm range for remainder of season. Recommend to get FAS-DPD test next season.