If an input chemical formulation remains on-site but is not actively used during a reporting month, it is still mandatory to include it in the inventory upload with a designated quantity of zero. This rule ensures that the full scope of chemicals present at the facility is structurally captured within the Performance InCheck Report, which provides the necessary baseline data to support later Root Cause Analysis (RCA) if non-conformities are detected in Clearstream Reports in wastewater or sludge testing.