Full specs are here:
https://www.rvusa.com/rv-guide/2010-...-2701ss-tr7686
The gray water tank (kitchen and bathroom sinks and shower) is 76 gallons. The black water tank (toilet) is 38 gallons.
This assumes that the specified parts were on hand the day the trailer was assembled. If not, they would have substituted what they had that fits, but it wouldn't be documented anywhere.