Where is TOC measured?
• After Reverse Osmosisto monitor membrane efficiency (especially where Thin Film Composite or TFC membranes are used). • After Deionization(DI) beds to monitor resin life and efficiency and to monitor shedding of new resins. • After the Final Polish to ensure low organic levels have been maintained after storage of pure water in tanks. • On Recycle (return of wet bench discharge waters) and Reclaim (reusing discharged waters in secondary applications outside the fab) lines, to ensure proper, low organic levels before return to the water system. • After TOC destruct UV lamps to monitor UV light efficiency. • Before the Point of Use distribution lines to ensure final water quality. • Monitor Boiler Feed water to prevent damage to turbines and other equipment. • To meet UPS <643> and EP 2.2.44 requirements. TOC is a pharmaceutical measurement required when producing USP purified water, WFI (Water for Injection), and HPW (Highly Purified Water). On November 15, 1996, the USP allowed on-li
