I Had a Cobalt level of 8.9 and after the first revision, it was still at 3.9. There are articles on the long term effects of Cobalt that you can research. What my experience has shown is that there is a lack of knowledge by the medical community regarding the systemic damage that may occur.
Best of luck in getting the answers that you need.

Can you tell us a little about the implants you have, and why they need to be removed?
Also, yes, it is concerning. But the very good news is that once the metal implants are removed, your body begins to eliminate the cobalt and chromium all by itself. Within 6 months to a year it will be back to normal.

Whether you have any permanent issues from it probably depends on how long the implants have been shedding metal, and how severely. The records that showed my pre-surgery metal leves are no longer available, but the numbers were much higher than yours, and I have recovered with minimal long-term effects.
Sue