Coal-fired power plant scrubbers now remove 80-90 % of airborne particulate, mercury, sulfur dioxide, nitrogen oxide and other pollutants. But that means “fly ash” and noncombustible residues (what we used to call clinkers) must be sent to landfills. That’s opened a new front for anti-energy activists, who use accidents, “detectable” pollutants in water, and scary stories about health threats to advance their agenda.
In 2008, a Tennessee Valley Authority earthen retainer dam near Knoxville ruptured, sending 5.4 million cubic yards of rain-soaked fly ash into a nearby river, lake, and neighborhood. Twelve homes were damaged by the muck, which contained low levels of arsenic, cadmium and other metals. The TVA’s cleanup efforts were less than exemplary, as were its measures to prevent the accident in the first place.
Companies and regulators clearly must do more to prevent accidents and pollution ‚Äì and more to educate people about the actual risks involved. With a new fly ash playbook being tested in North Carolina, Virginia and other states, as part of the war on coal and the keep-fossil-fuels-in-the-ground campaign, those informational efforts are vital.
Duke Energy operates 14 coal-fired electricity generating plants in North Carolina ‚Äì and several large fly ash facilities. Like coal itself, the ash contains trace amounts of hexavalent chromium (chromium-6 or Cr-6) and other metals that can be toxic to humans in high doses. Blazing temperatures bond the vast majority tightly in glassy, vitrified ash, and well-maintained impoundments ensure that few seep out.
However, tiny amounts can still escape into nearby surface waters and groundwater. Highly sensitive scientific instruments can now detect parts per trillion ‚Äì the equivalent of a few seconds in 3,300 years. In 2016, an NC state toxicologist ruled that metallic levels detected in surface and ground water around the state were dangerously high. He blamed ash from coal-fired power plants and persuaded Tar Heel health officials to send “do not drink” letters to several hundred families living near coal ash disposal sites.
In his view, there is “no safe level” for exposure to Cr-6, and the state should slash its allowable level from 100 parts per billion down to 0.07 ppb (1,428 times lower). Other health officials reviewed the scientific literature, determined that amounts detected pose no health risk, noted that Cr-6 often seeps from natural rock formations into surface and ground water, and rescinded the warning letters. But the resulting controversy continues, and the company, regulators, and politicians are trying to resolve it.
Duke Energy and many health experts maintain that Cr-6 levels found near the ash facilities (and miles away, from natural sources) are far below what cause health risks. But it wants to assuage concerns among families closest to the ash facilities. So the company offered to provide alternatives to their well water, by giving them access to public water sources or installing state-of-the-art home filtration systems.
In January 2017, the NC Department of Environmental Quality (NCDEQ) granted preliminary approval to these company plans for homes within one-half mile of a coal ash impoundment. Final approval is contingent on state health and environmental departments certifying that water provided via these systems meets “applicable” or “appropriate” standards for each location.
Now activists say Duke and other companies should move millions of tons of ash from multiple depositories. Not only would that involve hundreds of thousands of dump truck loads, millions of gallons of fuel, and huge trucks lumbering through towns and along back roads and highways. A far more basic question is: Take it where exactly? Who would want it? Activists certainly offer no viable alternatives.
Companies previously proposed turning fly ash into cement blocks or gravel, for construction projects. Activists quickly nixed that option, even though it would involve virtually no contamination risks. It’s becoming increasingly apparent that the real reason for all the vocal consternation is that these agitators simply want to drive coal out of business. Indeed, the same unaccountable, silver-tongued agitators also detest natural gas-generated electricity … and drilling and fracking to produce the gas. They oppose nuclear energy and even want hydroelectric dams and power plants removed. They claim to support wind and solar, by conveniently ignoring the huge downsides pointed out here, here, here, here and elsewhere.
Forcing utility companies to spend billions relocating huge ash deposits to “lined, watertight landfills” (in someone else’s backyard) will bring no health or environmental benefits. But it will bankrupt companies, send electricity prices soaring, and hurt poor, minority and working class families the most.
If rates double from current costs in coal-reliant states like North Carolina and Virginia (9 cents per kilowatt-hour or less) to those in anti-coal New York or Connecticut (17 cents), families will have to pay $500-1,000 more annually for electricity. Hospitals, school districts, factories, and businesses will have to spend additional thousands, tens of thousands or millions. Where will that money come from?
Virginia’s 665,000-square-foot Inova Fairfax Women’s and Children’s Hospital pays about $1,850,000 per year for electricity at 9 cents/kWh, but would pay $3,500,000 at 17 cents: a $1.6-million difference.
Will businesses have to lay off dozens or hundreds of employees, or close their doors? If they pass costs on to patients or customers, where will families find the extra cash? What will the poorest families do?
The war on coal, petroleum, nuclear and hydroelectric power is a callous, eco-imperialist war on reliable, affordable electricity, on jobs, and on poor and minority families. Policies that drive energy prices up drive people out of jobs, drive companies out of business, drive families into green-energy poverty.
Preventing ruptures and spills means selecting, building and maintaining the best possible ash landfill facilities. Safeguarding public water and health means properly addressing actual, proven toxicity risks.
The US Environmental Protection Agency and North Carolina set allowable Cr-6 limits at 100 ppb for drinking water (equivalent to 100 seconds in 33 years or 4 cups in 660,000 gallons of water). The state also applies a 10 ppb standard for well water. No one applies a 0.07 ppb standard (70 parts per trillion).
In 2015, the NCDEQ tested 24 wells two to five miles from the nearest coal plant or coal ash deposit; 20 had Cr-6 levels above 0.07 ppb but far below 100 ppb, underscoring its diverse origins. May 2016 tests could not even detect the chemical in Greensboro water, the News & Record reported.
A 2016 Duke University study found that hexavalent chromium is prevalent in many North Carolina surface and ground waters. Some come from coal ash deposits, but much is leached from igneous and other rocks found throughout the Piedmont region of Virginia, the Carolinas and Georgia. Other health experts note that Cr-6 is found in 70% to 90% of all water supplies in the United States. Applying a 0.07 ppb would mean telling hundreds of millions of Americans not to drink their water!
Moreover, studies have found that Cr-6 in water is safe even at 100 ppb or higher. A 2012 paper in the Journal of Applied Toxicology concluded that regularly drinking water with 210 ppb of Cr-6 poses no health risks. (The real health problems involve airborne Cr-6.) Journal of Occupational and Environmental Medicine, US EPA and other studies buttress those findings.
Equally important, an ability to detect a substance does not mean it poses a risk. Cancer is certainly scary, but the risk of getting cancer is not the same as dying from it. And people routinely accept risks of dying from activities they happily engage in daily. For example, the National Safety Council puts the lifetime risk of dying in a motor vehicle crash at 1 in 113; that’s 8,850 times greater than the alleged lifetime risk of contracting cancer from 0.07 ppb Cr-6 in water. Drinking and smoking fall into the same category.
However, all too many people seem easily terrified by “detectable” levels of strange-sounding chemicals. 100% clean is not necessary, not possible, not found in nature and not a sound basis for public policy.
Coal and chemical controversies like these offer our nation, states, and communities excellent opportunities to find novel solutions that recognize sound science, hidden agendas, often limited options, and undesirable repercussions of poorly informed policy decisions. Let’s hope they are up to the task.