QSO	dproj (kpc)	dproj/Rvir	log NHI/cm-2	log NSiII/cm-2	log NCII/cm-2	log NSiIII/cm-2	log NSiIV/cm-2	log NCIV/cm-2
4C21.35	105.9±0.3	1.192	13.219 $\genfrac{}{}{0ex}{}{\mathrm{+0.073}}{\mathrm{-0.088}}$	<12.151	<12.512	<11.771	<11.971	<12.297