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The distribution in a sewage treatment plant (STP) has been estimated using the SimpleTreat model (implemented in Chesar 3.7/EUSES 2.1.2), see table below. The distribution calculation is done for the substance using the physicochemical and biodegradation properties of the substance.

Table: Distribution modelling for STP

Fraction of emission directed to water by STP



Fraction of emission directed to air by STP



Fraction of emission directed to sludge by STP



Fraction of the emission degraded in STP



The distribution modelling indicates that tetramethylsilane will partition mostly to air.