Tin and Silicon in RO sample

[Mykesocalreef]

Is this something of concern? There are no metal parts associated with my RODI storage tank. Could either of these be due to expired (dirty) RODI components? Attached you will find my test results.
Thank you!

 

[dragon99]

Do you have a float valve? Those often have a metal pin or hinge piece.

 

[Mykesocalreef]

No I made sure to get one that is all plastic.