1. INTRODUCTION
2. DATA
2.1. HST-COS observations
2.2. MIKE observations
2.3. Magellan galaxy spectroscopy
3. ANALYSIS
4. RESULTS
4.1. Atomic gas properties
4.2. Diffuse molecular gas properties
4.3. Chemical abundance pattern
4.4. The galaxy environment of the DLA
5. DISCUSSION
6. CONCLUSION