The first part of this two part series laid out the process that a Natural Resource Trustee will follow to complete a sound Natural Resource Damage Assessment (NRDA) as well as the typical challenges they face from the Responsible Party. The second part will present the typical issues that the trustee will face as the NRDA is tested in a court of law. A major litigation hurdle typically concerns what counts as “sound science” under the fact specific circumstances of a particular case. Many responsible parties will attempt to challenge a trustee’s assessment under the Daubert standard, which is the test for admissibility of evidence. However, because trustees are selected for their scientific expertise and subject to applicable laws and policies, including guidance on how to conduct a NRDA, trustees are generally the best arbiters of appropriate science, and as such should not be subject to a rigorous Daubert analysis.