It is the analytical chemist’s objective to be unambiguous to a fault. This is also the regulators preference. If you give units for a result of mg/l, Total Suspended Solids then no one can say “I thought you meant volatile suspended solids” or “diatomaceous suspended solids.”
This precision in language goes beyond solids. For example, Cyanide in water has several flavors including: Total, Dissolved, Suspended, Free, Amenable to Chlorination, Weak Acid Dissociable, and Physiologically Available.
You will also see certain conventions that analytical chemists use to make results more fool-proof. For example, you never see .5 mg/l. it is always 0.5 mg/l. That way the tiny period doesn’t get lost.
If you are looking at a lab report that is ambiguous is some way you are right to be skeptical. Most laboratories are pretty careful about using the exact parameter name such as Total Suspended Solids. The regulatory community (at least in the United States) will usually reject reports when the parameter naming and results format is not in exact conformance with permit language. And.. permit writers – being related to lawyers – are pretty pedantic about precision in language.