Table 5: DLA and sub-DLA systems where no candidate emission lines are found and 3$\sigma $ upper limits for the line fluxes. Fluxes are in units of 10-17  erg cm-2 s-1.
QSO $z_{{\rm abs}}$ $f_{{\rm lim}} (3\sigma)$
Q0953+4749 4.244 2.5
Q1451+1223 2.256 4.0
Q1802+5616 3.554 4.0
Q1802+5616 3.811 2.2
Q2155+1358 3.565 3.5
Q2233+131 2.551 4.8

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