If you are asking about extracts, any processing lab with Chromatography or T-SEP will be able to help you.
If you are asking about remediation over the Final Rule:
Total THC Final Rule Compliancy: There are no federal regulations that limit the sale of flower that has passed its pre-harvest compliance tests and contains less than 0.3% Delta 9 THC. This is true even if final batch testing of flower contains over 0.3% total THC. New USDA regulations only apply to pre-harvest tests. Finished flower sales still fall under the rules of the 2014 & 2018 farm bills. Even after new rules come into effect, flower that has previously passed compliance tests remains just that – compliant.
I hope this helps.