Final answer:
The question does not provide enough context to determine the exact number of daily water quality tests a Certified Pool Operator must perform. The frequency of testing can be influenced by EPA water quality standards and other regulations that specify criteria for safe water conditions but do not directly state a daily number of required tests.
Step-by-step explanation:
The question of how many water quality tests per day must be completed by the Certified Pool Operator (CPO) doesn't have a specific numerical answer provided within the reference material. To answer this question directly would require knowledge of the specific protocols and regulations in place for a CPO, which could vary depending on local laws and guidelines or specific organizational standards.
It is important to consider factors such as the water quality standard elements established by the EPA, including designated uses of the water body and water quality criteria to protect these uses, and the testing protocols for disinfectants as defined by the AOAC.
Concerning the mention of the AOAC's standards, these refer to how disinfectant manufacturers must conduct use-dilution tests to validate their product's efficacy, requiring 59 of 60 replicates to show no growth for a passing result. However, this does not directly translate to daily testing requirements for CPOs. Water quality standards as set forth by amendments to the Safe Drinking Water Act, such as MCLs and TTs, as well as public water system regulations by the EPA, also guide testing but do not specify daily test numbers.