Mosier, Oregon – June 3, 2016 Derailment Site Assessment Report
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Mosier, Oregon – June 3, 2016 Derailment Site Assessment Report Union Pacific Railroad Company Prepared for Oregon Department of Environmental Quality October 28, 2016 2020 SW 4th Ave, Suite 300 Portland, OR 97201 Contents Section Page Acronyms and Abbreviations ............................................................................................................... v 1 Introduction ......................................................................................................................... 1-1 1.1 Site Description ................................................................................................................ 1-2 1.2 Nature of Release ............................................................................................................ 1-2 2 Emergency Response Procedures .......................................................................................... 2-1 2.1 Columbia River Response Actions.................................................................................... 2-1 2.2 Derailed Tank Car Removal and Track Repair .................................................................. 2-1 2.3 City of Mosier Wastewater Treatment Plant Response Actions ..................................... 2-1 3 Incident Command Sampling ............................................................................................... 3-1 3.1 Surface Water Sampling .................................................................................................. 3-1 3.1.1 Surface Water Grab Sampling ............................................................................ 3-1 3.1.2 OSU Diffusion Bag Sampling ............................................................................... 3-2 3.1.3 Surface Water Analytical Results ........................................................................ 3-2 3.2 Sediment Sampling .......................................................................................................... 3-3 3.2.1 Sediment Sampling Approach ............................................................................. 3-3 3.2.2 Sediment Analytical Results ................................................................................ 3-3 3.3 Groundwater Sampling .................................................................................................... 3-3 3.3.1 Groundwater Sampling Approach ...................................................................... 3-4 3.3.2 Groundwater Analytical Results ......................................................................... 3-4 3.4 Soil Sampling .................................................................................................................... 3-4 3.4.1 Initial Excavation and Confirmation Soil Samples ............................................... 3-5 3.4.2 Additional Soil Removal and Confirmation Sample Collection ........................... 3-5 3.5 Other Response Action Sampling .................................................................................... 3-5 3.5.1 Pothole Soil Sampling Near Manhole ................................................................. 3-5 3.5.2 Mainline Track Confirmation Soil Sampling ........................................................ 3-6 4 Biosparge Treatment System ................................................................................................ 4-1 4.1 Treatment System Design ................................................................................................ 4-1 4.2 Startup ............................................................................................................................. 4-1 4.3 Operation Monitoring ...................................................................................................... 4-2 5 Future Site Actions ............................................................................................................... 5-1 5.1 Surface Water Sampling at Rock Creek and Wetland ...................................................... 5-1 5.2 Groundwater Sampling .................................................................................................... 5-1 5.3 Soil Gas Surveying ............................................................................................................ 5-1 5.4 Biosparge Operations ...................................................................................................... 5-1 5.5 Site Restoration ............................................................................................................... 5-1 Appendixes A Spill Report and Incident Command Sampling Plan B Representative Site Photographs C OSU Passive Sampling Device SAP and Final Report D Previous Surface Water Sample Results E Laboratory Analytical Data Packages CONTENTS, CONTINUED F Boring Logs G Previous Groundwater Sample Results Tables 3-1 Columbia River and Rock Creek Surface Water Sample Results (September 7, 2016) 3-2 Columbia River Sediment Sample Results 3-3 Rock Creek Sediment Sample Results 3-4 Groundwater Sample Results (September 8 and 9, 2016) 3-5 Initial Confirmation Soil Sample Results (Soil Later Removed) 3-6 Final Confirmation Soil Sample Results (Characteristic of Soil Left in Place) 3-7 Pothole Soil Sample Results near WWTP Manhole 3-8 Mainline Track Confirmation Soil Sample Results 3-9 Miscellaneous Soil Sample Results Figures 1-1 Site Features 1-2 Initial Response Actions 3-1 Surface Water Sampling Locations 3-2 Sediment Sampling Locations 3-3 Soil Confirmation Samples in Excavation Area (NWTPH-Dx/Gx Results) 3-4 Pothole and Mainline Track Sample Locations 4-1 Biosparge System Layout IV EN1011161111PDX Acronyms and Abbreviations µg/kg microgram(s) per kilogram µg/L microgram(s) per Liter AIS air injection system BTEX benzene, toluene, ethylbenzene, and xylene DEQ Oregon Department of Environmental Quality Dx diesel range organics Gx gasoline range organics Hz hertz I-84 Interstate 84 ICS Incident Command System MDL method detection limit mg/kg milligram(s) per kilogram mg/L milligram(s) per Liter NOAA National Oceanic Atmospheric Administration NS near shore O oil range organics ORP oxidation reduction potential OS off shore OSU Oregon State University PAH polycyclic aromatic hydrocarbon PID photo-ionization detector ppm parts per million PSD passive sampling device PVC polyvinyl chloride SAP sampling and analysis plan TPH total petroleum hydrocarbon UPRR Union Pacific Railroad Company VFD variable frequency drive VOC volatile organic compound WWTP wastewater treatment plant SECTION 1 1 Introduction This site assessment report presents the results of surface water, sediment, wastewater treatment plant (WWTP) water, soil, and groundwater samples collected by Union Pacific Railroad Company (UPRR) in response to a derailment that resulted in a Bakken crude oil release on June 3, 2016. This site assessment report presents a summary of response measures implemented, remedial actions implemented, and the methods and rationale for the various media sampled. The report also presents information on the air biosparge treatment system installed at the site to treat groundwater in the vicinity of the release. The report is organized as follows: • Section 1.0 Introduction: This section describes the site conditions, spill location, and the nature of the release. • Section 2.0 Emergency Response Procedures: This section presents a summary of cleanup efforts conducted in response to the release. The primary efforts included initial fire response, Columbia River response actions, removal of damaged tank cars, the City of Mosier WWTP response actions, and impacted soil removal efforts. • Section 3.0 Incident Command System Sampling: This section presents the incident command system’s sampling approach and analytical results for different media including surface water, sediment, soil, WWTP water, and groundwater. • Section 4.0 Biosparge Treatment System: This section discusses the treatment system installed to treat impacted groundwater north of the release area. • Section 5.0 Future Site Actions: This section discusses future actions to be completed at the site. • Appendix A Spill Report and Incident Command Sampling Plan: This appendix contains a report that summarizes the nature of the spill, initial reporting, extent of cleanup measures implemented, and incident command sampling plan. • Appendix B Representative Site Photographs: This appendix contains representative photographs taken during the spill response and subsequent cleanup. • Appendix C Oregon State University (OSU) Passive Bag Sampling and Analysis Plan (SAP) and Final Report: This appendix includes documents developed by third-party contractor, OSU, detailing the results of deploying passive diffusion bag samplers in the Columbia River near the WWTP outfall. • Appendix D Previous Surface Water Sample Results: This appendix contains surface water sampling results pre-dating those presented in the main body of this report (prior to September 7, 2016). Comparison tables of the analytical results from the grab sampling and the OSU sampling are also presented in this appendix. • Appendix E Laboratory Analytical Data Packages: This appendix contains the laboratory analytical data packages for the samples collected in conjunction with the cleanup efforts. • Appendix F Boring Logs: Boring logs for MW-1 to MW-8, EW-1, EW-2, and BS-1 to BS-5 are included in this appendix. • Appendix G Previous Groundwater Sample Results: Groundwater sampling results prior to those presented in the main body