USFS knows the law. I think they feel these laws are out of date. Their tactic is to impose their regulations and force the claim holders to agree to some outrageous conditions or take them to court. Typical claim holder is eventually worn down, out of money, or dies and the USFS rules.
Actually the Pershing County online document search is one of the nicer ones. Very simple and relatively straight forward. The trick is to pick the appropriate list and only enter the info you need to make the list you want.
You may have the same basic rights but you won't legally have any firearms. You can not bring firearms into the U.S. of A. without a permit. Generally for hunting or shooting competitions only. See:
Bringing Firearms into the U.S. ? ezbordercrossing
Looks to me that the 3 elements that register 0.3 exceed the 0.2 limit and you would have to reduce this somehow to make it acceptable. Just a guess. Why don't you get the information you need from the company doing the analysis?
Also, the test result shows you do have radioactive elements IMO.
Pick a day and place. Hundreds, thousands of dredgers descend on a stream and break the law in mass. Bank to bank dredges in the water. Banks lined with supporters blocking those who would ticket the dredgers. Block the roads. Clog the courts. Massive disobedience.