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Chemical Checks

DHEC requires a daily check of FREE chlorine and pH.

The pH check is done in the large cylinder and uses reagent R4. The FREE chlorine check is done in the small cylinder and uses reagents R1 and R2.

Reagent R3 is used to determine total, or combined, chlorine. This is a test that the LPO may perform periodically but it is not part of the daily required chemical checks.