I think you would certainly benefit from at least one expert testimony on the NPRI.
The reality, though, is that starting about several years ago, the NPRI seems to have fallen apart a little bit; it seems to have lost its allure among environmental advocates in respect to its strength in collecting all the data, and it came under attack by several industry associations. I'm referring back to a previous question with respect to confidentiality agreements, because environmental advocates were able to tether out exactly which plants were cleared, and what....
I really can't say, as I have not been involved with the NPRI in the last three years, so I don't know if it's improved since that low point, but it's certainly worth at least a cursory investigation.