Fits to metal absorption lines in the BG quasar spectrum. Dashed purple, blue, and red lines mark components in regions A, B, and C. Thin dashed red lines indicate the six individual low-ionization components associated with region C. C iv absorptions are not detected for the BG-A1 and BG-A2 components, and no metal absorption lines associated with the BG-B component are detected. Si iiλ1304 absorptions appear directly to the right of the O iλ1302 absorptions in the uppermost panel. The BG-A1 C ii component is blended with the Si iiλ1304 absorption from a z ≃ 2.75 DLA (dotted gray lines), but the BG-A2 component is unaffected. Dotted gray lines in the C iv λλ1548, 1550 panels likewise indicate components from the Si iiλ1526 absorption associated with the same z ≃ 2.75 DLA. Zero velocity is at z = 2.6894, and the 1-σ error on the flux is shown in magenta.