Download - Wrecks of the World II Wreck Remediation and Pollution Recovery – Case Studies Zach Malinoski
Factors Driving Wreck Removal Approach
SUCCESSFUL WRECK AND POLLUTION
REMEDIATION
COST
SCHEDULETE
CHNIC
AL
Minimize Cost? - Reduce schedule with innovative recovery approach/technology- Increase schedule with proven techniques
Minimize Schedule? - Apply innovative recovery approach/technology- Increase workforce and equipment
Minimize Technical Risk? - R&D innovative recovery approach/ technology before application- Increase workforce and equipment
JACK-UP MODU - GoM
• Drifted 5000’, capsized, and sank at 113’ water depth
• Most fuel tanks damaged during IKE
• Arrangement & depth allowed traditional recovery techniques
• Challenges-– Limited floating resources in
wake of Ike response– Limited weather window
JACK-UP MODU - GoM• Systematic inspection via
divers & taps• Excavation required to
access smaller tanks and barrel stores
• ~36K gallons recovered 2008
• Additional pockets discovered & removed in 2009 when recovery efforts continued
Dredger – Sri Lanka
• May 2009 – Aground on tetrapod breakwater during monsoon
• Weather prevented recovery efforts until January 2010
• POLs observed released from May onward
Dredger – Sri Lanka• Wreck severely
damaged during monsoon
• Survey discovered one small hydraulic oil tank intact – oil was removed via tap
• In-situ Cut Up – pieces sized to keep fuel/POL tanks intact
Challenges for World Wide Wreck Removal
• Create environment that encourages quick POL recovery– Recovery rates higher and costs lower when POLs
recovered from wreck instead of water• Limit responder third-party liability exposure• Cost Effective Assets & Technologies for:– Remote Sensing– Saturation Diving– Deepwater Recovery– Surface Platforms capable of operating in adverse
weather conditions