OK, but you don't measure TC with the FAS-DPD kit. You measure FC and CC.

So...if your FC was 1 and your CC was .2 THEN your TC is 1.2.

But it may not be. If CC measures at .2, then minimum then it may be .1 or less. It merely means there is SOME CC. And if it's coming in at .2 then don't worry about it.