I defer to Mark's far superior expertise than mine, but when I read the RGB values of the horizontal grayscale bar in your scan 0001 on my monitor using the application "Digital Color Meter" on my Mac, I get mostly pure gray readings with R, G and B being equal. Once you get to the darker values, it starts to wander some toward blue, depending on where in the tone rectangle I'm reading. For whatever it is worth, on my monitor, the pure white in lower left reads 218, 218, 218 and the black in darkest patch in the lower right reads 24,24,24. And the vertical bar, #16 values all read as pure gray as well.
And your 0002 scan has a decided red cast visually (not green) and the Digital Color Meter values show a deficiency in R.
I'm on a Spectraview calibrated NEC 2690 on a Mac, reading your files in Safari.
Brad