risk assessment and remedial strategy for oil pipeline spills … · existing wetland restoration...
TRANSCRIPT
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Risk Assessment and Remedial
Strategy for Oil Pipeline Spills
Presented by: Richard C. Bost, P.E., P.G. (Texas)
I2M Associates, LLCHouston, Texas
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Version 1.3
International Petroleum Environmental Conference, October 7, 2019, San Antonio, Texas
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Acknowledgements
Many thanks to those who contributed:
John Milner, Brunini Law Firm
Associates & Partners of ERM
Ryan Gleason, Astra Environmental
Lori Magyar, I2M Associates and AuradonConsulting
Our clients and Andrew Fono, formerly of Winstead and Haynes & Boone
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Scope and Objectives of Presentation
.
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My Presentation is focused on the risk assessment lessons
learned from several spills (one of which I can discuss
Publicly: an 8,000 barrel spill on the Leaf River in Mississippi)
And how the lessons learned can be integrated into
Spill Response Planning and Training
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Integrate Risk Assessment into Spill Response
• Emergency Oil Spill Response Procedures
– Contain and remove the spill
– Prevent spill from impacting sensitive areas
– Clean-up immediately to extent practical
• [Similar to] Comprehensive Risk Assessment Structure:
– Define extent
– Define potential for further migration
– Assess potential pathways for ecological & human exposure
– Identify critical sensitive species, habitats and pathway(s)
– Assess whether further clean-up/remediation is required
– Design and implement impact area monitoring plan as part of assessment
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Leaf River Case Study
Slick ultimately determined to be 20 miles long
at time it was discovered
Accidental discovery early a.m.: truck driver crossing bridge
Discovered December 24th
Unknown source
500 and 3500 barrels - initial estimates
Ultimately identified a corrosion induced leak in a dip in a gathering line 6.5 miles from Leaf River
Leak had seeped into a marsh/swamp and had accumulated in low area behind beaver dam
Rain washed oil down wooded tributary to River
Slick broke up in flooded river
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Leaf River in Mississippi
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One of Ten Most Incredible Rivers in US
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Leaf River, MS:
“sportsman’s getaway”
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Case Study: Spill Discovered (20 miles)
Downstream of Unknown Source
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Purpose of Training & Planning
• To prevent oil discharges from reaching the navigable waters of the U.S. or adjoining shorelines,
• To ensure effective response to the discharge of oil, and
• To ensure that “proactive” measures are used in response to an oil discharge.
• To provide notification of a spill when a harmful quantity of discharged oil occurs:
– Exceeds a reportable volume
– Violates state water quality standards.
– Causes a film or sheen on the water’s surface.
– Leaves sludge or emulsion beneath the surface.
Post-Spill Risk Assessment: Support a Natural Resources Damage Assessment and Ultimate Penalty/Cleanup Requirements
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Take Home Lessons from 8000 Barrel Oil Spill
• Source Identification: Can require Multi-faceted Approach
• Source Area Wetland Assessment: Oil can move over surface of soil/water AND underground
• River Segment Investigation: Requires investigation of eddy areas and banks
• Immediate response reduces potential for migration and further damage
• Integration of Natural Resource Assessment into Incident Command proved Essential and was key to Project Success
• Project Success: addressing spill fully with minimal long-term impacts
– Requires immediate spill response to contain the spill,
– Requires skilled collaboration of multiple parties and agencies,
– Requires application of latest technological understanding of migration
– Key to success is communication and understanding the potential complexity of the issues involved.
Priority: Finding, Assessing, Addressing Source & Volume11
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Natural Resource Impacts 8000 Barrel Oil Spill
• The Trustees evaluated injury to a number of natural
resources and natural resource services as outlined
Risk Assessment & Restoration Plan.
• Damages included in Restoration Plan: (1) injury to the
stream bed of the unnamed tributary, (2) the riparian
buffer zone along the unnamed tributary, (3) the
wetlands associated with the tributary, (4) the
groundwater, and (5) injury to wood ducks.
• Other resources affected by the spill: catfish, turtles,
deer and rabbit reported Wildlife Summary Sheet; the
Trustees determined the resources had recovered
quickly to their pre-incident condition.
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Natural Resources Affected by 8000 Bbl
Spill
Resources Affected:
Waters of the US (including surface water & ground water),
sediments,
riparian vegetation,
invertebrates,
fish and
birds.
The Agencies Identified as Natural Resource Trustees may pursue restoration costs to compensate the public for natural resource injury, loss or destruction. Federal regulations define "injury" as "an observable or measurable adverse change in a natural resource or impairment of a natural resource service" (15 C.F.R. Section 990.30). The regulations define "services" as "the functions performed by a natural resource for the benefit of another natural resource and/or the public" (15 C.F.R. Section 990.30).
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Potential Surface Water Impacts
Surface Water Quality and Floating Oil
Biota, including fish, ducks, turtles, benthic organisms
Sandbars
Shorelines
Beaches
Habitat for a variety of species including birds, reptiles,
amphibians, and large and small mammals.
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Wetlands & Ground Water
Wetlands: number acres impacted
Groundwater quality (with benzene MCL of 5 ppb being limiting usually) .
Spill Transport to Sensitive Habitats and Users—requires modelling
MNA is preferred remedy if no users or surface water discharge impacts
Ground water monitoring for 5 years is typical minimum, with re-openers
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Typical Restoration Plan, Similar to Leaf River
8000 Barrel Oil Spill
• Streambed Restoration: The preferred alternative for restoration of injuries and loss of services from the stream bed is the reintroduction of in-stream structure (i.e. woody debris) to replace that removed during clean-up activities,
• Riparian Habitat Restoration: Additional morphological modification measures to restore the biological and physical parameters as well as retard bank erosion, including restoration of riparian buffers.
• Wetlands Restoration: The preferred alternative to address wetland injuries is to enhance wetlands in a degraded state adjacent to an existing wetland restoration project.
• Ground Water Restoration: None, since no impacts to local ecology, surface water, & aquifer recharge have been detected to date and since restoration through ongoing remediation and monitoring will preclude such impact.
• Birds: Finally, the preferred alternative to restore injuries to wood ducks is placing thirty-nine (39) wood duck nesting boxes in the DeSoto National Forest, Jones County, Mississippi.
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OSRP RESPONSE GUIDE Assumes Known
Source
Spill Assessment & Volume Estimation includes source identification Spill Pollution Report Form
Notifications
Internal Notifications
External Notifications
Agency Notifications
Emergency Support
Spill Response Support
SRO & SRT
SR Organizational Chart & Roles/Responsibilities
Dispersant Approval Process
OSRO Locations & Equipment Inventory
Facility Locations
Incident Command Structure (ICS) RecordKeeping Forms
Weather Report
Notification Report
ICS 201-1 through 201-4, ICS 202, ICS 205, ICS 206, ICS 208, ICS 21417
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A Case Study for Regional Training
Leaf River, Mississippi 8000-barrel Oil Spill Case Study Provides a Practical Basis for Training
Spill Responses Are Inherently Complicated
Coordination of Numerous Parties
Conflicts between Regulatory Drivers and Practical Urgency of Responding with Media
Source Identification is a Key Component of Response
Gathering Data for Risk Assessment in Real Time during Response is also key
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A No. 1 Priority: Integrating Source Identification and
Impact/Risk Assessment into Response System
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Incident Command Structure Priorities
The Incident Command System (ICS) is a standardized approach to the command, control, and coordination of emergency response[1] providing a common hierarchy within which responders from multiple agencies, parties and contractors can be effective.
ICS was initially developed to address problems of inter-agency responses to wildfires in California and Arizona but is now a component of the National Incident Management System (NIMS)[2] in the US, where it has evolved into use in All-Hazards situations, ranging from active shootings to HazMat scenes.[3] In addition, ICS has acted as a pattern for similar approaches internationally.[4]
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Source Identification & Assessment Tools
• Identify and Obtain Cooperation of Potential Sources• Training to exercise with operators & terminals to
search for potential leaks• Lines running short as a trend• Pipeline SCADA systems may provide clues but may
not detect leaks• Gathering lines as well as pressurized transport lines• Slow pin hole leaks that travel long distances
underground and/or through thick shrubbery or woods can be source
• Procure & Utilize Resources for Aerial Flyovers • Take Advantage of New Advanced Systems: drones,
sniffers, and multi-light band detectors including satellite systems to penetrate vegetative covered areas
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Leaf River Case Study for Regional Planning
Slick ultimately determined to be 20 miles long
at time it was discovered
Accidental discovery early a.m.: truck driver crossing bridge
Discovered December 24th
Unknown source
500 and 3500 barrels - initial estimates
Ultimately identified a corrosion induced leak in a dip in a gathering line 6.5 miles from Leaf River
Leak had seeped into a marsh/swamp and had accumulated in low area behind beaver dam
Rain washed oil down wooded tributary to River
Slick broke up in flooded river22
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Source? Truck, Terminal, Rail, Tank,
Pipeline
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Challenge: Old spills provide false leads
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Aspects of Response Used in Risk Assessment
• Field Data
• Feeding out Pieces of Information in Real Time and Allowing Participants to Respond
• Identification of pipeline operators & terminals to search for potential leaks
• Document flyovers of river, tributaries, terminals, pipelines and gathering lines
• Use of advanced source identification tools
• Pipeline excavation/clamping/material sampling/repair exercise – with metallurgical lab & leak volume estimation
• Residual Source Cleanup with Volume Tracking
• Volumes Recovered Must Be Integrated into Impact Risk Assessment as well as Immediate Response
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Regional Maps & Familiarity with Area – Similar to
Good Policing & Fire Department Preparedness
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Regional Source Assessment Priorities
First: Identify Source & Respond to Control Oil Slick
Cut off source and leading edge
Initial windshield and flyover assessment
Contact collaborators and protect sensitive &
developed stretches – pre-identify sensitive areas
Daily ICS meetings and patrols to identify source &
oil “traps” and assess operations
Track oiled banks up river to find source
Flyovers – multiple lines & fields nearby
False leads – previous releases discovered
Public advisories & contact residents, businesses
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Marshy Swamp, not visible from air
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Beaver Dam Trapped Much of Oil
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A Second Rainstorm: a challenge & blessing
both, allowed tracing slick to source area
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Leak Assessment Tool: A Multi-Functional
Flyover: Identify Potential Sources/Traps &
Access Points Along River
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Leak Assessment Tool: Familiarity with
Area
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Leak Assessment Tool: old rail line and
trail maps
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Leak Assessment Tool:
timber cutting trails
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Leak Assessment Tool: Familiarity with
updated drainageway maps
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Impact Assessment Tools: Geologic
Structure Maps
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Daily Flow Forecasts
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Leak Assessment Tools: transportation
alternatives
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Leak Assessment Tools: Alternative
Transportation Methods
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Leak Assessment Tools: Volume Estimation &
Recovered Material Sampling & Fingerprinting Lab
Methods
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Leak Volume Assessment: Handling
Oiled Materials
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Leak Assessment Tools: Part of Volume
Estimation
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There is Always a Focus on Volume Estimation
Leaf River Case Study:
• Immediate Source Area
• 6.5 Mile Long Tributary
• 20 Mile Long Leaf River
• Volumes Varied depending on method
Barrels Released Varied depending on method
7980 from Line pressure release calculation
8400 recovered material
9000 Slick plus extrapolation from impacted area sampling
7230 Disposal Volume sampling
500-3500-6500-5600 initial slick thickness estimations
3500 Marsh Tributary EIA Estimate 43
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Impact Risk Assessment Tools: Summary
• Integrate Source Identification & Assessment into
Planning & Training
• Train on how to identify unknown leaks along gathering and transportation pipelines
• Be familiar where in old pipelines leaks are most likely
• Be familiar with area/ include local collaborators familiar with area and fate and transport mechanisms
• Anticipate that leaks may not be visible
• Train on assessing volume of leak
• Include expert assessors and pipeline specialists on Regional Response Team of Collaborators
• The Leaf River 8000 Barrel Leak provides a excellent case study for training purposes 44
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Any Questions or Comments?
You have completed your Primer on Oil Spill
Risk Assessment and Remedial Strategies
If you have any questions or for more
information on Impact & Risk Assessment
Training,
call 713-417-0710 or email
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Questions and Answers
Thank you for this opportunity to
share my perspectives with you.
Richard C. Bost, P.E., P.G.Lead Risk Assessment & Permitting Group
Chief Engineer
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IPEC # 26, October 2019, San Antonio, Texas