1.1.1 Incident Category
Oil Spill Response & Removal Assessment

1.1.2 Site Description
At 01:30 on December 4, 2015 a tanker truck rolled over on Interstate 90 at mile marker 81, approximately 3 miles west of Cle Elum, Washington. A reported 3,000 gallons of gasoline spilled into the center median ditch of the interstate, which is approximately 100 feet laterally and 30 feet upgradient from the Cle Elum River.  The Cle Elum River is a tributary to the Yakima River approximately 1 mile downstream from the spill.  EPA, Washington Department of Ecology (ECY), Washington Department of Transportation (WA DOT), Yakama Nation and the responsible party's cleanup contractors responded on December 4, 2015. As of December 5, no gasoline has been observed in the Cle Elum River. Containment and absorbent boom are deployed.

1.1.2.1 Location
Interstate 90, mile marker 81.  Approximately 3 miles west of Cle Elum, WA.  Latitude 47.184384 Longitude -121.00466. 

1.1.2.2 Description of Threat
Reported 3,000 gallons of gasoline was spilled from the center median ditch along Interstate 90 within approximately 100 feet of the Cle Elum River.  Approximately 300 gallons which had pooled in the median was recovered.  The Cle Elum River is a tributary to the Yakima River and a navigable waters of the U.S..  It is approximately 30 feet down gradient from the center median ditch to the river. As of 12/5/2015, no sheen has been observed on the Cle Elum River at the spill site or downstream. 

Drinking Water intakes and a fish hatchery operated by the Yakama Nation are located downstream.  ECY responders notified drinking water utility operators.  Fish hatchery intakes are being monitored for oil sheen; Yakama Nation staff report that no sheen has been observed.

1.1.3 Preliminary Removal Assessment/Removal Site Inspection Results
Excavated soils from test pits located down gradient, at the spill location and up gradient are contaminated with gasoline; air monitoring indicated the highest VOC levels at the spill location with peak readings of 190 ppm.  No recoverable/free/liquid product or sheen was observed within the excavated soils or in the test pits.  As of December 5, 2015, no sheen has been observed on the river. 

2.1.1 Narrative
OSC Fowlow, OSC Becker, and one START responded from Seattle on December 4, 2015 after receiving confirmation from SOSC that navigable waters were threatened. 

2.1.2 Response Actions to Date
12/4/2015 - Pumped off remaining fuel in tank truck and removed wreck, recovered any remaining fuel on the roadway, deployed 150 feet of hard/diversion boom and 150 feet of absorbent boom in the Cle Elum River, and excavated 3 pits with the hopes of recovering free product from spill.  No free product was observed in the 3 pits. 

EPA Region 10 Phone Duty Officer notified all trustees.  OSC Becker contacted Washington SHPO to confirm that road fill areas do not require archeological monitor however future deeper excavations may.

12/5/2015 - Monitor boom deployed in the Cle Elum River.  The National Weather Service issued a winter weather advisory (freezing rain and snow) forecasted for the entire day. Due to concerns for the safety of responders and vehicles on I 90 and the mitigation of immediate threats to water, Unified Command decided to limit operations to monitoring boom by responsible party contractors; all other responders demobilized.

2.1.3 Enforcement Activities, Identity of Potentially Responsible Parties (PRPs)
PRP is the trucking company, Kenn Advantage Group. 

2.1.4 Progress Metrics

2.2.1 Anticipated Activities
Continue monitoring boom deployed in the Cle Elum River.  The responsible party's contractors will submit plans for removal of contaminated soil to EPA, ECY, DOT, and Yakima Nation.  Next week oversight of the cleanup will transition to the Washington Department of Ecology Toxic Cleanup Program. 

2.2.1.1 Planned Response Activities
Continue monitoring boom deployed in the Cle Elum River.  Weather permitting, begin construction of a quarry spall road/shoulder extension to allow for vehicle access to site and lessen the need for traffic control or lane closures. 

2.2.1.2 Next Steps
The responsible party's contractors will submit plans for removal of contaminated soil to EPA, ECY, DOT, and Yakima Nation.  A planning conference call will be held at 17:00 PST on December 6, 2015.

2.2.2 Issues

Due to inclement weather (freezing rain/snow),  Washington Department of Transportation would not permit closing a traffic lane on I-90 due to safety concerns.  Although recoverable product was not found in test pits, the high levels of soil contamination and proximity to the Cle Elum River indicate a continued threat of oil migration to the river through subsurface flow.  Weather forecasts indicate  significant precipitation that could cause migration to the river.  The proximity to the bridge abutments may limit excavation and traffic management must be carefully planned to prevent safety risks to responders or highway traffic.

3.1 Unified Command
EPA Region 10 – Jeff Fowlow, FOSC

ECY – James Zuluga, SOSC

DOT - Scott Anfinson

Yakama Nation - Elizabeth Sanchey, Tribal OSC

Kenan Advantage Group (RP) - Brian Wymer

3.2 Cooperating Agencies