Which of the following is a requirement for compliance regarding the removal of TOCs?

To effectively ensure compliance with regulations concerning the removal of Total Organic Carbons (TOCs), it is essential to monitor TOC levels regularly. Calculating TOC levels quarterly allows water treatment facilities to verify that they are meeting established standards for TOC removal. This continuous monitoring is crucial for both regulatory compliance and the effective operation of the treatment process, as it provides data on the effectiveness of different treatment methods over time.

Regular assessments help identify trends or issues that may necessitate adjustments in treatment practices. By keeping track of TOC levels on a quarterly basis, water treatment facilities can make informed decisions about operational changes, ensuring that treated water meets safety and quality standards. This process is fundamental to maintaining the integrity of drinking water supplies and protecting public health.

Other options, while potentially beneficial for TOC removal, do not directly relate to the requirement for compliance regarding monitoring and assessing TOC levels. For example, using multiple treatment technologies or installing advanced systems may enhance TOC removal efficiency, but baseline monitoring remains critical for compliance. Implementing ozone treatment can be effective, but compliance depends on consistent measurement and reporting of TOC levels.