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Asiana Flight 214:
Storm Drain and Soil
Remediation
Bay Pollution Prevention Program
Presenter: Jennifer Acton [email protected]
Summary of Emergency Remediation Efforts
• Overview of Initial Contamination
• Evaluation of Storm Drain System
• Emergency Soil Remediation
• Storm Drain Remediation
• Post-Emergency Remediation Activities
• Lessons Learned
Overview of Initial Contamination
• July 6, 2013, Asiana Flight 214 made a crash landing
onto Runway 28L.
• The right wing of the aircraft, which was leaking jet fuel,
came to rest directly over a storm drain catch basin.
• Approximately 2950 gallons of jet fuel was spilled onto
the soil or into the storm drain system.
• Due to the resulting fire, AFFF firefighting foam entered
the storm drain system.
Right Wing & Adjacent Catch Basin
Left Wing and Adjacent Catch Basin
Evaluation of Storm Drain System
• Immediately following the crash, both storm drain pump stations
servicing the affected area (1A and 1B respectively) were taken
offline.
• Water samples were collected from pump stations 1A & 1B and
subsequently analyzed. 1B was determined to be free of
contamination, while both jet fuel and AFFF were detected in 1A.
• BPPP staff walked the crash site to evaluate which catch basins
and storm drain pipes had been affected.
Map of Affected Storm Drains
View of Aircraft from Station 1A
AFFF Foam in Wet Well
Emergency Soil Remediation
• Meeting conducted with RWQCB to propose the Emergency soil
remediation plan.
• Surveying the crash site and collection of (7) base samples
• After the aircraft had been transported offsite, (4) visually contaminated
areas were found. Contaminated soil was removed.
• Contamination was confirmed by the analysis of soil samples collected by
contracted geologist.
• All contaminated soil and asphalt were placed in 20 yard bins, and were
subsequently sampled and transported to an accredited landfill.
Map of Base Samples
Map of Contaminated Samples
Figure from Site investigation report prepared by Burns & McDonnell Engineering Company
Storm Drain Remediation
• Immediately following the crash, pump stations 1A and 1B were both
taken offline.
• Removal of the contaminated water from pump station 1A wet well so
flushing of the storm drainage lines could take place.
• Constant pumping out of affected wet well from any excessive tidal
infiltration to prevent flooding.
• Cleaning and flushing affected storm drainage lines near Asiana 214 final
resting point. (Approximately 3,200 feet of pipe)
• Testing water in storm drainage system and wet well.
Removal of Water from Pump Station 1A
Boring Hole into Drainage Pipe
Pumping Water Out of Drainage Pipe
Triple Flushing of Drainage Pipe
Steel Plate for Bore Hole
Cleaning of Pump Station 1A
Cleaning of Pump Station 1A
Post-Emergency Remediation Activities
• After triple flushing the storm drain pipe that runs under Runway
28L, samples were collected to ensure all contaminants had been
removed. Analysis of these samples confirmed that the line was
indeed clean.
• After triple flushing affected pump station, A 96h Acute Fish
Bioassay Screen was performed using tidal infiltration collected
from the station’s wet well.
• The 96h static renewal, 1x24hr passed the effluent toxicity test with
a 100% survival rate.
Post-Emergency Remediation
Activities
• The analytical data was submitted to the Regional Water Board.
After the RWQCB approval, pump station 1A was placed back
online.
• As a precautionary measure, booms were placed in the pump
station and around the outfall.
• All contaminated water, sand and soil were transported to
approved disposal facilities.
Lessons Learned
• 24/7 Spill Notification Individual
• Emergency Contracting Procedures in Place
• Be Prepared for the Unexpected
Long Term Soil & Groundwater
Remediation
Presenter: Emily Sing
Associate Engineer | Environmental Services and
Sustainability
Moving On
Develop Site
Investigation Report
Estimate volume of Contaminated soil and ground water
* All activities were conducted by Asiana, approved by the Regional Board and SFO
Develop Workplan Identify extent of contamination
Figure from Site investigation report prepared by Burns & McDonnell Engineering Company
• 50 boreholes • 10 feet deep • Analyzed for soil contamination in 3 ft. intervals • Analyzed for groundwater contamination
Figure from Site investigation report prepared by Burns & McDonnell Engineering Company
Estimated Remaining Contamination
Medium Estimated Quantity
Groundwater, Gallons 81,000
Soil, Tons 2,839
Estimated Quantities under review
Moving On
Develop Workplan
Develop Site
Investigation Report
Identify extent of contamination
Estimate volume of Contaminated soil and ground water
Develop
Remediation Plan
• Identify clean up standards and schedule for clean up
Questions?
