Polution Situation Report

U.S. ENVIRONMENTAL PROTECTION AGENCY
POLLUTION/SITUATION REPORT
CHS Tank Truck Spill - Removal Polrep
Initial Removal Polrep

EPA Emergency Response

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
Region X

Subject:

POLREP #1
CHS Tank Truck Spill
E15007
Republic, WA
Latitude: 48.3379200 Longitude: -118.7494500

To:

From:

Greg Weigel, OSC

Date:

5/21/2015

Reporting Period:

May 19 through 21, 2015

1. Introduction

1.1 Background

Site Number:	E15007	Contract Number:
D.O. Number:		Action Memo Date:
Response Authority:	OPA	Response Type:	Emergency
Response Lead:	PRP	Incident Category:	Removal Action
NPL Status:	Non NPL	Operable Unit:
Mobilization Date:	5/19/2015	Start Date:	5/19/2015
Demob Date:		Completion Date:
CERCLIS ID:		RCRIS ID:
ERNS No.:		State Notification:	Colville Confederated Tribes
FPN#:	E15007	Reimbursable Account #:

1.1.1 Incident Category
OPA Emergency Response

1.1.2 Site Description
On May 19, 2015 a CHS Inc. tank truck and pup trailer rolled over on WA State Highway 21 at mile marker 136.5, approximately 35 miles south of Republic, Washington. This is within the Colville Confederated Tribes Reservation. A reported 2,800 gallons of gasoline and 60 gallons of diesel fuel were reportedly spilled into the uphill ditch of the highway, which is approximately 50 feet laterally and 30 feet upgradient from the Sanpoil River. The Sanpoil River empties into Lake Roosevelt and the Colombia River approximately 30 miles downstream from the spill. EPA, Colville Tribes, CHS Inc. (the trucking company) and their cleanup contractors are responding. As of May 21, no gasoline or diesel had been observed in the Sanpoil River. Containment and absorbent boom are deployed.

1.1.2.1 Location
WA State Route 21, mile marker 136.6. Approximately 35 miles south of Republic, WA. Latitude N48.33792, Longitude -118.74945

1.1.2.2 Description of Threat
Reported 2,800 gallons gasoline and 60 gallons diesel fuel were spilled and not recovered from the ditch along Highway 21 within approximately 50 feet of the Sanpoil River. The Sanpoil River is a tributary to the Columbia River and a navigable waters of the U.S.. It is approximately 30 feet down gradient from the highway to the River. It is anticipated that spilled gasoline will travel through road fill material under the highway toward the River. As of 5/21/2015, no sheen has been observed on the Sanpoil River at the spill site or downstream. Elevated volatile organic compounds (VOCs) have been monitored, however, along the bank and in soils at the waters edge, indicating a migration pathway for the gasoline plume to the River. The OSC determined, therefore, that the spill represents a substantial threat of discharge.

1.1.3 Preliminary Removal Assessment/Removal Site Inspection Results
Excavated soils from the ditch at the spill location are heavily contaminated with gasoline. As of 5/21/2015 no sheen has been observed on the River, but elevated VOCs are observable along the waters edge adjacent to the spill site.

2. Current Activities

2.1 Operations Section

2.1.1 Narrative
OSC Liverman responded from Coeur d'Alene on 5/19/2015 after receiving report of the spill from the NRC. OSC Weigel responded from Boise on 5/20/2015 as did two START contractors from Seattle. On 5/20/2015, OSC Weigel provided the CHS Inc. representative on site a Notice of Federal Interest, and directed CHS to take aggressive action to mitigate a discharge to the Sanpoil River of spilled product.

2.1.2 Response Actions to Date
5/19/2015 - Pumped off remaining fuel in tank truck and pup trailer and removed wreck
5/20/2015 - Installed 150 feet of sorbent boom at presumed seep site adjacent to spill location, and 275 feet of containment boom several hundred feet downstream. Assessed Sanpoil River for discharge and vapors.
5/21/2015 - Installed another set of 200 feet of containment boom approximately 1 mile downstream. Developed plan to install approximately 10 monitoring/recovery 4" wells at 10 foot intervals to monitor subsurface product plume and, as feasible, withdraw product in both liquid and vapor phase using vacuum. Began removal of contaminated soils from uphill ditch side of highway. Two drill rigs, two vacuum trucks, two dump truck, and a 320 excavator arrived on scene. Began drilling and borehole logging of monitoring/recovery wells. Collected surface water quality samples at projected seep location and upstream and downstream for 24-hour analytical turnaround.

2.1.3 Enforcement Activities, Identity of Potentially Responsible Parties (PRPs)
PRP is the trucking company, CHS, Inc.,

2.1.4 Progress Metrics

*Waste Stream*	*Medium*	*Quantity*	*Manifest #*	*Treatment*	*Disposal*

2.2 Planning Section

2.2.1 Anticipated Activities
Complete approximately 10 monitoring/recovery wells at approximately 10' spacing on shoulder between spill site and River. Recover liquid and vapor phase product as feasible. Monitor boom and river for sheen or discharge. Collect another round of surface water quality samples. Complete removal of contaminated soils in uphill ditch, to the extent possible without impinging road integrity.

2.2.1.1 Planned Response Activities

2.2.1.2 Next Steps
Evaluate information from monitoring/recovery wells and borehole log data and determine need for further excavation of soils underneath highway.

2.2.2 Issues
Removal of contaminated soils underneath highway would require closure of the highway for significant period of time and coordination with DOT.

2.3 Logistics Section