TOC can come from the feed water utilized to make UPW, in the parts utilized to convey the UPW (additives within the production piping products and solutions or extrusion aides and mold release brokers), from subsequent producing and cleaning operations of piping techniques, or from filthy pipes, fittings, and valves. https://newsprospect.com/the-ultimate-guide-to-pure-water-cleaning-with-a-water-fed-pole-for-solar-panel-cleaning/