Natural Resources Defense Council
Anthony Swifts Blog
Rebutting industry’s arguments against due dilligence for tar sands pipelines
Posted November 14, 2012 in Moving Beyond Oil, Solving Global Warming, U.S. Law and Policy
In response to growing public concerns about the safety of tar sands pipelines and the risks that tar sands spills pose to their communities, industry lobbyists at the American Petroleum Institute (API) and its surrogates have been busy making the argument that industrys plans to transport millions of barrels of tar sands on the U.S. pipeline network requires no due diligence. The Kalamazoo tar sands spill in Michigan tragically demonstrated the consequences industrys failure to evaluate the safety risks of the pipeline transport of tar sands diluted bitumen after more than two years and nearly a billion dollars in cleanup cost, officials at the Environmental Protection Agency (EPA) have found that nearly 40 miles of the Kalamazoo river is still contaminated by submerged tar sands. In the face of a public increasingly concerned by proposals to build tar sands pipelines like Northern Gateway through British Columbia, Keystone XL through the Ogalla aquifer to the Gulf Coast, and Enbridge’s pipeline through Canada’s eastern provinces and New England, industry lobbyists have been making a number of disingenuous arguments to avoid doing due diligence. But their arguments simply do not withstand close scrutiny.
Lets take a closer look.
Claim 1: According to API, crude derived from tar sands has been transported by pipeline since 1968
This statement is incredibly disingenuous. When the tar sands industry refers to crude oil derived from the tar sands, what theyre actually talking about is tar sands bitumen which has been processed in upgraders to create synthetic crude oil. Upgrading facilities located on tar sands mines have historically put raw tar sands bitumen through an initial refining process. While synthetic crude oil is derived from tar sands, it is physically and chemically different than bitumen.
In our report Tar Sands Pipeline Safety Risks, NRDC raised the alarm that tar sands production had far outstripped the capacity of upgraders to process it. Rather than build new upgraders, in the late 90s industry began mixing tar sands bitumen with volatile natural gas liquids and transporting the heavy, viscous mixture called diluted bitumen – in pipelines. It was this mixture that spilled into the Kalamazoo River in Michigan in 2010, causing the most expensive pipeline accident in U.S. history.
Claim 2: According to API, diluted bitumen is not heated for transportation in pipelines
API often makes the claim that tar sands diluted bitumen is not heated from transportation in pipelines and that the range of temperatures for all crude oils from Canada is 40 to 75 degrees Fahrenheit. As they say, a picture is worth 1000 words, so the best place to start is TransCanadas own temperature effects study for Keystone XL:
TranCanada Temperature Study.png
Figure 1. TransCanadas temperature affects study for Keystone XL, State Department Final EIS
Now this chart may prove to be conservative Keystone 1s maximum temperature is listed as 158 degrees F. To clarify, tar sands diluted bitumen is so viscous, or thick, that when it is pumped at high pressures in pipelines, it generates a tremendous amount of friction which in turn generates heat. As tar sands diluted bitumen moves further down the pipeline, it gets hotter and hotter.
And that in itself is a cause for concern. Temperature is a known factor in pipeline spills dramatically increasing the rate of spills due to external corrosion. A small patch of pipelines moving heavy crude in Kern county, California demonstrate the risk of high temperature pipelines. A statewide study of pipeline safety in the 90s revealed that higher temperature pipelines were almost 12 times more likely to fail due to external corrosion than ambient temperature pipelines moving conventional crude.
External Corrosion Incidents.png
Figure 2. Relationship between pipeline temperature and spills, California State Fire Marshalls (CSFM) 1993
Claim 3: The U.S. currently refines heavy crude oil blends from Mexico and Venezuela which have similar properties as diluted bitumen
This is another industry red herring. While certain crudes from Venezuela and Mexico have similar levels of corrosivity as Canadian tar sands, they are not transported on the U.S. pipeline system. The U.S. Energy Information Administration (EIA) tracks imports of crude into the country with some specificity. Their databases show that heavy crudes from Venezuela and Mexico are refined on the same coastal refineries in which theyre imported. The only crudes which are moved on the U.S. pipeline systems are ones which are significantly lighter and less corrosive similar to crudes produced in West Texas and North Dakota.
Texas City Refinery.png
Figure 3. Satellite image of Texas City refinery – a typical coastal refinery where heavy crudes are processed at port of entry.
Claim 4: U.S. regulators at the Pipeline and Hazardous Materials Safety Administration (PHMSA) have sufficiently strong regulations to ensure the safety of diluted bitumen tar sands pipelines
Thats not what PHMSAs Administrator Cynthia Quarterman told Congress. When asked, she told the House Energy and Power subcommittee that 1) pipeline safety regulations werent established with diluted bitumen in mind and 2) her agency couldnt assure the safety of pipelines move diluted bitumen without more study.
Moreover, following the San Bruno and Kalamazoo pipeline disaster, federal investigators at the National Transportation Safety Board (NTSB) have laid blame on both pipeline operators as well as regulators at PHMSA, repeatedly citing weak regulations and poor enforcement as contributing factors.
Pervasive organizational failures by a pipeline operator along with weak federal regulations led to a pipeline rupture and subsequent oil spill in 2010 NTSB on Kalamazoo tar sands spill, July 10, 2012
Claim 5: The Federal Energy Regulatory Commission (FERC) controls the sediment levels in pipelines in their tariff agreements
FERC doesnt have jurisdiction over pipeline safety for hazardous liquid pipelines and doesnt set its tariff requirements to ensure their safety. Refineries have reported significantly more sediment in Canadian heavy crudes. In fact, under FERCs tariff requirements, a pipeline like Keystone XL would move 125 pounds of sediments and water per minute. Neither industry nor regulators have investigated the safety risks associated with these sediment levels and doing so isnt part of FERCs job or expertise.
Claim 6: Analysis of pipeline failure statistics by Albertan regulators at the ERCB hasnt detected any significant differences between pipelines handling conventional crude versus pipeline carrying crude bitumen, crude oil or synthetic crude oil.
This would be useful information if the ERCB had any means of detecting differences between pipelines carrying diluted bitumen and conventional crude, but they dont. ERCB tracks conventional crude, synthetic crude and diluted bitumen pipelines simply as crude oil pipelines. Those pipeline categories are all tracked as crude oil in ERCBs spill statistics. Until the ERCB starts collecting more precise data, it will be unable to detect problems with diluted bitumen pipelines whether or not they exist.
Claim 7: Alberta Innovates found that Canadian tar sands had properties similar to other heavy Canadian crudes
In Tar Sands Pipeline Safety Risks, NRDC compared diluted bitumen to West Texas Intermediate, a light crude representative of the crudes historically moved on the U.S. pipeline system. Its similar to the crude produced throughout Texas, Oklahoma, New Mexico, North Dakota and Montana. API and other industry groups claimed it wasnt fair to compare tar sands diluted bitumen with WTI, because diluted bitumen isnt anything like WTI. On that point we agree. However, industry groups then argued that diluted bitumen should be compared with similar heavy crudes that had not been historically moved on the onshore pipeline system in significant volumes such as Mexican, Venezuelan or Canadian crudes.
Alberta Innovates conducted such a study, comparing diluted bitumen to very heavy blends of Canadian crude which 1) required similar unconventional production processes as tar sands, 2) could not be moved in pipelines without being mixed with volatile light natural gas liquid condensates, 3) had not historically been moved in significant volumes on the U.S. pipeline system, 4) have significantly increased in production over the last ten years on the same pipelines moving tar sands.
Heavy Crude versus diluted bituemn.png
Figure 4. Both tar sands diluted bitumen and the heavy Canadian crudes Alberta Innovates compares it to have not been historically been move on the U.S. pipeline system in large volumes, data from U.S. Energy Information Administration
As we discussed when the report came out, industry should not be allowed to avoid doing diligence regarding diluted bitumen transport in pipeline because diluted bitumen compares with a similar crude for which industry has also not done due diligence.
Comments (Add yours)
Michael Berndtson Nov 15 2012 08:43 AM
Tar sands is like creosote. Creosote is coal tar derived and cut or diluted with a solvent like diesel or mineral spirits so it can flow. Its specific gravity as a liquid mixture is around 1.0 to 1.1 (water being 1.0). The issue with tar sands flowing through the XL Pipeline along the Great Plains is upon the “extremely slight chance of a spill” – the fluid won’t necessarily stop at the near surface water table – but continue migration downward through the subsurface – potentially impacting the lower aquifer. When creosote is spilled into the subsurface it kind of separates into its original components as it flows downwards. So lower density stuff pools on the near surface water table – and the denser stuff to sinks until something stops it – tight clay or bedrock.
Bottom line. Subsurface remediation becomes a common place light non-aqueous phase liquid (LNAPL) petroleum hydrocarbon remediation to a big messy LNAPL and dense NAPL or DNAPL remediation. See Superfund sites for wood treating like Libby Groundwater. Hopefully this was considered already for permit bonding.
Michael Berndtson Nov 15 2012 09:52 AM
The second paragraph in the comment above makes little to no sense. Sorry. The bottom-bottom line is that subsurface remediation, should it ever be necessary would be more similar to a typical DNAPL project rather than a more commonplace LNAPL projects, i.e. more costly. Always write, proof-read, submit (WPS).