 5 ship docks designed for Aframax tankships 80K - 120K DWT  Mooring piles with quick-release capabilities  Mooring system analysis being conducted for slightly smaller LPGCs

 Transfer propane/butane to/from liquefied gas carriers  Dual purpose – import and export of propane and butane based upon market demand  Annual throughput ~72,600,000 bbl

 Slightly smaller than AFRAMAX  Capacities up to 83,000 m 3  Fully refrigerated  Estimate 7-9 /mo  Maximum 11/ mo

 Sabine Pilots  Sabine Neches Navigation District (SNND)  USCG MSU

 No unusual challenges  LPGCs within the size range for night transit  Traffic increase within usual ranges  No differences compared to other traffic

 Same issues as for as LNG until get above Golden Pass  Project width ft  Depth 40 ft minimum  Port Arthur Ship Canal –no developed areas

 West Port Arthur / City of Port Arthur  Residential/industrial at Port Neches  Residential areas at Nederland ~1.4 miles from dock  Environmental Resources  LPG operations present no new risks for those areas

 Modest increase in deep draft vessel traffic volume  2,800 vessel arrivals & 71,000 barge transits in 2012  20% to/beyond Sunoco  8 LPGCs/mo = 96/yr = 3.4% increase  11 LPGCs/mo = 132/yr = 4.7% increase

 Pilots – 29 pilots and 2 trainees – Adequate for expected levels of operations  Tugs – local fleet = 11 vessels – #1 concern overall – Fleet might have to grow to meet demand

Safety Risk Assessment Summary

 Waterways leading to the Mariner South Project LPG Terminal at Nederland, TX are suitable for marine LPG operations

 Tom Rodino-Consultant ◦ Office: ◦  Wayne Turner-Terminal Manager ◦ Office: ◦  Glenda Davalos- Operations Integration Manager, Mariner South Project ◦ Office: ◦  Ellen Clark-Supervisor-Lab, Lubes, Security ◦ Office: ◦  Joey Mahmoud-Vice President Engineering, Energy Transfer ◦ Office: ◦