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1. Introduction
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1.1 Background
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Site Number: |
10MY |
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Contract Number: |
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D.O. Number: |
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Action Memo Date: |
1/27/2015 |
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Response Authority: |
CERCLA |
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Response Type: |
Time-Critical |
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Response Lead: |
PRP |
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Incident Category: |
Removal Action |
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NPL Status: |
Non NPL |
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Operable Unit: |
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Mobilization Date: |
4/13/2015 |
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Start Date: |
4/13/2015 |
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Demob Date: |
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Completion Date: |
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CERCLIS ID: |
WAD980726368 |
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RCRIS ID: |
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ERNS No.: |
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State Notification: |
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FPN#: |
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Reimbursable Account #: |
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1.1.1 Incident Category
Time Critical Removal Action
1.1.2 Site Description
Tributyl tin-contaminated sediments under Pier 4 in Tacoma, Washington.
1.1.2.1 Location
1 Sitkum Way, Tacoma, WA
1.1.2.2 Description of Threat
Tributyltin at levels exceeding 50,000 ug/kg were found in the sediments under Pier 4 during a predredge sampling performd by the Port of Tacoma in 2013. Tributyltin is an environmental toxin affecting mollusks and was banned in the 1990s.
1.1.3 Preliminary Removal Assessment/Removal Site Inspection Results
The Port of Tacoma collected and analyzed samples of sediment under Pier 4 in July 2014 to determine the extent and depth of contamination. Results indicated a removal action was necessary to dredge and remove approximately 50,000 cubic yards of sediment.
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2. Current Activities
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2.1 Operations Section
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2.1.1 Narrative
2.1.2 Response Actions to Date
The Port of Tacoma issued a notice to proceed to Orion Marine Contractors (OMI) on April 10, 2015 and they mobilized the following week to put up a fence, mobilize equipment to Pier 4 and start disconnecting utilities. On April 23, work began on removal of the pier deck. On June 15, 2015, OMI began pulling the pilings holding up the pier deck using a vibratory hammer. On August 17, 2015 OMI began removing clean sediment upslope from the contaminated sediment and dumping it at an open-water disposal site managed by the Department of Natural Resources. Removal of clean sediments was completed on September 14, 2015.
2.1.3 Enforcement Activities, Identity of Potentially Responsible Parties (PRPs)
The Port of Tacoma is the PRP performing the removal action. Research is being conducted to identify additional PRPs. The Port of Tacoma and EPA signed an AOC for the removal action effective 02/06/2015.
2.1.4 Progress Metrics
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Medium |
Quantity |
Manifest # |
Treatment |
Disposal |
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2.2 Planning Section
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2.2.1 Anticipated Activities
A news release will be issued by EPA after contaminated dredging begins.
2.2.1.1 Planned Response Activities
Contaminated dredging and operation of the transload and water treatment site at APM terminal is expected to begin on September 15, 2015
2.2.1.2 Next Steps
2.2.2 Issues
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2.3 Logistics Section
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No information available at this time.
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2.4 Finance Section
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No information available at this time.
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2.5 Other Command Staff
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No information available at this time.
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3. Participating Entities
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No information available at this time.
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4. Personnel On Site
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EPA
The Port of Tacoma
Orion Marine Contractors (OMI)
Subcontractors to OMI
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5. Definition of Terms
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No information available at this time.
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6. Additional sources of information
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6.1 Internet location of additional information/report
A notice of availability of the administrative record was published in the News Tribune newspaper on 04/15/2015. Those records can be found at the EPA Region 10 Superfund Records Center in Seattle as well as at:
The Mary Rose Kobetich library, 212 Browns Point Boulevard NE, Tacoma, WA 98422
Citizens for a Healthy Bay, 535 Dock Street, Suite 213, Tacoma WA, 98402
6.2 Reporting Schedule
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7. Situational Reference Materials
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No information available at this time.
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