Table 3: Lines from Systems C and D detected in the Keck spectrum.
No.Line ID $z_{\rm abs}$ b $\log N$ M05 ID
    ( kms-1) ( cm-2)  
System C $\mbox{$z_{\rm abs}$ }= 2.54$
1.H I 2.53787 $\pm$ 0.00003 25.00 (fixed) 15.659 $\pm$ 0.270  
1.C IV 2.53787 $\pm$ 0.00003 8.32 $\pm$ 4.25 13.510 $\pm$ 0.155 1; C IV
System D $\mbox{$z_{\rm abs}$ }= 2.55$
1.H I 2.55222 $\pm$ 0.00001 25.00 (fixed) 13.569 $\pm$ 0.697  
1.C IV 2.55222 $\pm$ 0.00001 10.00 (fixed) 12.585 $\pm$ 0.410 1; C IV
2.H I 2.55383 $\pm$ 0.00015 25.00 (fixed) 14.414 $\pm$ 1.474  
2.C IV 2.55383 $\pm$ 0.00015 10.00 (fixed) 13.456 $\pm$ 0.790 2, C IV
3.H I 2.55409 $\pm$ 0.00018 25.00 (fixed) 16.042 $\pm$ 1.916  
3.C IV 2.55409 $\pm$ 0.00018 14.45 $\pm$ 7.54 14.407 $\pm$ 0.863 3; C IV
3.Si IV 2.55409 $\pm$ 0.00018 11.81 $\pm$ 8.00 12.850 $\pm$ 0.043 1; Si IV
4.H I 2.55442 $\pm$ 0.00005 25.00 (fixed) 14.865 $\pm$ 1.732  
4.C IV 2.55442 $\pm$ 0.00005 11.40 $\pm$ 3.96 15.200 $\pm$ 1.134 4; C IV
4.Si IV 2.55442 $\pm$ 0.00005 10.64 $\pm$ 4.40 13.593 $\pm$ 0.085 2; Si IV
4.N V # 2.55442 $\pm$ 0.00005 38.57 $\pm$ 16.44 13.191 $\pm$ 0.105  

¶ - Saturated line; # - likely blend of components 3 and 4.

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