That is another bit of Thermacore incompetence.
They sent samples to a lab at LeHigh University. A researcher (Al Miller) ran Electron Spectroscopy for Chemical Analysis on the samples and sent a report back. That report should have been part of their report but was not. That is incompetent and suspicious. ESCA is used to measure the elements on a surface. I would expect an ESCA report to label the results with the elements that were found. But the only element on the Thermacore figure is Ni. But we know that one sample has been in contact with potassium carbonate (and hot hydrogen but ESTA cannot detect H or He). A guess would be that there would be K, C and O contaminants but maybe outside of the Thermacore figure using a 70 - 35 eV binding energy range.
We do not expect Miller to be able to confirm a minor lab run that was done in 1993.
I doesn't appear that what Al Miller (at Lehigh) did was 'minor'. He was developing methods to identify hydrino. The short Thermacore report says on page 4:
"Methods are being perfected by Lehigh University for detecting the hydrino atom. [8] One of these methods, called ESCA ... has been shown to be capable of identifying the hydrino atom absorbed on the surface of the nickel ..."
I suspect that new methods had to be employed because the binding energies involved were much higher than usual.