the cork...
When submitting different samples for analysis, the submitter can request different ASTM standards, depending upon what they are looking for and how much they want to spend. The metal tests that I've requested in the past have been for soil, rock, and water.
We typically requested analytical results for a range of metals, not metal specific requests, because my line of business was environmental consulting (we wanted to know how much of ANY metal was in a given sample...there are standards about how much of any given metal can be in ground water, for example). Results would typically be in parts per million if in soil...if in water, then parts per billion.
However.
I worked on an elemental mercury impacted property about 3 years ago and we ordered mercury specific tests, as these were cheaper than the full gamut of metal analysis.
I guess my answer is, it depends on what you want.