Results for tap water and filtered TW (RODI)

[NatsRams]

I submitted 2 samples that were not from an aquarium - tap water and filtered (RODI) water. So unlike a sample from an aquarium, I have no system volume to enter on the website. I initially entered the total volume among the 3 vials sent to the lab (0.045 L), but the site defaulted to 0 and the system said an invalid value was entered. I do get data if enter 1 for 1L, but I don’t have confidence in the number because it is a false volume.

How should I interpret the data for those samples? Is the entered volume necessary for determining the concentration?

TIA