Ama-TOC veials ezitsheni ezihlanjululwe ngaphambili ezenziwe ngengilazi esezingeni eliphakeme ye-borossiling noma ezinye izinto zokwakha. Banezobulungiswa ngokuqondile ukuze banciphise izingozi zokungcolisa ezihambisana nezimo zendabuko, ukuqinisekisa ukuthi ngisho nakumanani wokulwa nokungcola kwe-organic awakubeki ukufundwa kwe-toc.