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California Water Board to Investigate Use of Oilfield Wastewater to Irrigate Crops

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Expert panel will assess safety of eating food grown with treated wastewater

California Kern County oil industry aerial shot pump jacks energy

Photo © J. Carl Ganter / Circle of Blue
Kern County is the center of California’s oil industry. The practice of treating and reusing oilfield wastewater for irrigation is coming under greater scrutiny. Click image to enlarge.

By Brett Walton
Circle of Blue

On January 12, in an office building east of Sacramento, an expert panel on food safety will gather for its first public meeting. The panel’s task: determine what safeguards are required for the reuse of oilfield wastewater for irrigation in California’s Central Valley so that the food that is grown does not cause illness and disease.

The panel is a project of the Central Valley Water Board, the state agency charged with preventing water pollution in the 720-kilometer (400-mile) long valley that is the heart of America’s fruit, vegetable, and nut industries.

Oilfield wastewater, produced water in technical terms, has been used for more than two decades to grow oranges, grapes, and other crops in Kern County, which accounts for more than 70 percent of California’s oil production. At the southern end of the Central Valley, Kern County is a desert, receiving less than 25 centimeters (10 inches) of rain per year.

Produced water flows out of a well along with the oil. California’s oilfield geology is particularly water-rich, with roughly 15 barrels of water for each barrel of oil. More than 3.3 billion barrels (140 billion gallons) of produced water came to the surface in 2014. Most of the salty, chemical-laden water is reinjected underground to increase oil production. But water districts, keen to secure additional supplies as water availability wanes, are eyeing it as a new source.

The convening of the food safety panel follows many months of serious questions about California’s handling of its oilfield waste. A U.S. Environmental Protection Agency investigation that concluded in 2014 determined that oil companies, with permits from state regulators, injected wastewater into aquifers that were meant to be protected. Fifty-six injection wells have since been shuttered in an attempt to regain compliance. The Central Valley Water Board is also reviewing the integrity of above-ground ponds, another disposal method, and will issue rulings by December on whether the 619 active ponds can continue operating.

Environmental groups, including Water Defense, founded by the actor Mark Ruffalo, also brought to the board’s attention potential problems with the treated produced water used for irrigation in Kern County.

For that reason, the Central Valley Water Board decided to enlist the expert panel.

“The effort is primarily to make sure that crops that are irrigated with produced water are OK for human consumption,” Clay Rodgers, manager of the Fresno office of the Central Valley Water Board and the organizer of the panel, told Circle of Blue. “There is no specific timeline. We would like the report as soon as possible, but this is a complex topic and there is not much research. We want to know: Where are the data gaps? What more information do we need?”

Greater Scrutiny

The food safety panel is a departure for the Central Valley Water Board, whose main purpose is to ensure the quality of rivers, streams, and aquifers.

Rodgers said that he wants to take a conservative approach and would consider amending water quality permits, if the panel found that crops grown with produced water were a disease risk.

“If it came to light that there is an issue with certain crops and compounds, we would place stricter standards on the water permit to protect human health,” Rodgers said.

California Kern County oil industry produced water irrigation Carl Ganter Circle of Blue

Photo © J. Carl Ganter / Circle of Blue
Produced water is treated and blended with fresh water before being applied to fields and orchards, but environmental scientists are urging a closer look at the water’s chemical composition. Click image to enlarge.

Environmental health experts are urging greater caution when using produced water because districts do not know exactly what chemicals are in the product.

“What they are monitoring for are naturally occurring substances that come from these geologic formations — hydrocarbons, heavy metals,” said Seth B.C. Shonkoff, a member of the expert panel and the executive director of PSE Healthy Energy, a science policy institute in Oakland. They are not testing for any chemical additives that oil companies use to clean and operate their wells, he said. California has no state requirement to disclose all of the chemicals that go down a well.

Shonkoff added that, in general, reusing water is a smart idea, especially as California grapples with increasing water insecurity and the worst drought in state history. But the use of produced water, he argued, needs to be examined with more rigor. What are these chemicals? In what quantity are they used? How toxic are they? Are there spikes in concentrations that infrequent testing would miss?

“There are a number of data gaps,” Shonkoff said. “But the most flagrant is the lack of disclosure of chemical additives.” Senate Bill 248, introduced last year in the California Legislature, would require oil companies to disclose all chemicals injected into a well. It would also require monthly reports on the chemical composition of produced water.

Scientific reports also point out gaps in monitoring for chemicals used in hydraulic fracturing, or fracking. Though fracking is rare in California, a California Council of Science and Technology report published in July 2015 concluded that more research is needed on the use of produced water for irrigation. In only two oilfields that supply produced water for irrigation — Mount Poso and Kern River — has fracking taken place, and only three times since 2012, all in Kern River. However, water districts are not required to monitor produced water for the fluids used in fracking.

California oil industry wastewater produced water infographic Kaye LaFond

Graphic © Kaye LaFond / Circle of Blue
For every barrel of oil pumped in California, roughly 15 barrels of water flow out of the well. Click image to enlarge.

Water Districts Welcome the Panel

Those districts that already use produced water welcome the investigation.

“We have no problem with the panel,” said David Ansolabehere, general manager of the Cawelo Water District, which has used produced water for irrigation since 1995. “It will be good to prove that this is good quality water and that the program should be expanded.”

Ansolabehere, who will testify at the January 12 meeting, told Circle of Blue that the produced water it acquires from Chevron and Valley Water Management accounts for 30 percent of the district’s supply, roughly 30,000 acre-feet (9.7 billion gallons) per year. The produced water is treated and then blended with fresh water to dilute the salts, which can kill crops.

As canal deliveries from northern California to the Central Valley become less certain, more districts are looking to follow Cawelo’s lead. Last September, North Kern Water District, a nearby jurisdiction, began taking what could amount to 21,000 acre-feet (6.8 billion gallons) of produced water per year from California Resources Corporation.

There are several pathways that people could be exposed to chemicals in produced water used for irrigation: food consumption; sprinkler irrigation systems that could spray field workers; and groundwater that might have been contaminated by irrigation runoff. The expert panel, however, will look only at the first pathway, Rodgers said: the food.

The eight-person panel includes officials from the California Department of Food and Agriculture, California Department of Public Health, and California Department of Fish and Wildlife. It includes representatives of the Almond Board of California, and environmental health and food safety researchers from Lawrence Berkeley National Laboratory, Exponent, and Environmental Resources Management.

The post California Water Board to Investigate Use of Oilfield Wastewater to Irrigate Crops appeared first on Circle of Blue WaterNews.

Source: Water News

Source: Water Industry News

The Stream, January 11: Zambia Dam Hits “Dangerous” Water Levels

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The  Global Rundown

The Global Rundown

Months of drought have depleted water levels at the Kariba dam, where Zambia may be forced to shut down hydropower production. A dairy company from Saudi Arabia has purchased land in California to grow alfalfa for its cows, and researchers have warned that major dams planned for the Amazon, Congo, and Mekong river basins could devastate fish diversity. Oklahoma has experienced a “millennium’s worth” of earthquakes over the past two years, possibly due to wastewater disposal from fracking operations. Satellite images show that less sludge spilled into Brazilian rivers from an iron ore mine last year than previously thought. Water experts in Egypt are urging the country to secure its share of Nile River water in negotiations over the Grand Renaissance dam.

“The situation is dire. I’m praying. We sit here and gaze at the sky and say, ‘please, the levels of Kariba are at extremely dangerous levels.’” –Dora Siliya, Zambia’s energy minister, on the situation at Kariba dam. Extremely low water levels at the hydropower dam could force Zambia to halt electricity production there, which accounts for nearly half of the country’s generation capacity. (Bloomberg)

By the Numbers

By The Numbers

$31.8 million Amount spent by a Saudi Arabian dairy company to purchase land in California to grow alfalfa. Saudi Arabia’s government is phasing out domestic production of green fodder, such as alfalfa, over the next three years due to dwindling water sources. Reuters

32 million cubic meters Amount of sludge spilled from tailings dams at a Brazilian iron ore mine last year, polluting rivers and sending deadly mudslides downstream. The revised numbers are lower than the 50 million cubic meters originally estimated. Reuters

1,427 earthquakes Number in Oklahoma registering above a level three on the Richter scale over the past two years, nearly a “millennium’s worth,” according to scientists. Researchers have raised concerns that the quakes are related to the disposal of wastewater from hydraulic fracturing operations. Guardian


Science, Studies, And Reports

More than 450 hydropower dams are planned in the Amazon, Congo, and Mekong river basins, threatening one-third of the world’s freshwater fish, according to an article published in the journal Science. The authors argue that fish passages are inadequate, and that large dams change the dynamics of floodplains downstream that are essential for fish foraging and reproduction. Guardian

On the Radar

On The Radar

Water experts in Egypt are urging the country to ensure that Ethiopia will guarantee its share of water from the Nile River, despite construction of the Grand Renaissance hydropower dam. Discussions over the dam’s design continue between the two countries. Daily News Egypt

The post The Stream, January 11: Zambia Dam Hits “Dangerous” Water Levels appeared first on Circle of Blue WaterNews.

Source: Water News

Source: Water Industry News

Fracking shakes American west: ‘a millennium’s worth of earthquakes’

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Guardian: Increasingly tied to tremors shaking the west, fracking for natural gas is creating alarm and division around western states that until recently enjoyed a boom in jobs and revenue.
In Oklahoma, seismologists have warned that significant temblors last week could signal a larger, more dangerous earthquake to come in a state where drilling is destabilizing the bedrock.
Last Wednesday night two earthquakes, measuring 4.7 and 4.8 on the Richter scale, struck rural northern Oklahoma, beneath a major…
Source: Waterconserve News

Source: Water Industry News

Chemicals in Melbourne’s Yarra River created a health risk, says report

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AAP: A toxic cocktail of chemicals and herbicides has been washed into Melbourne’s Yarra River, killing trees and creating a public health risk, according to a Parks Victoria report.
An internal incident and hazard summary report on Parks Victoria operations between January and October 2015 has revealed toxic chemicals were flowing into the Yarra from a wash-down facility in the Warrandyte state park, located next to popular swimming spot Pound Bend.
The report said the “wash-down facility used…
Source: Waterconserve News

Source: Water Industry News

Here’s How Software Could Save Salt Marshes

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Climate Central: It’s a mild and sunny summer day on the tidal salt marshes at Barn Island Wildlife Management Area, which sits across Little Narragansett bay from Stonington, Conn. Walking through a wide, dry stretch of marsh, Chris Elphick, a conservation biologist at the University of Connecticut, focuses a spotting scope on a group of little brown birds hidden among the thigh-high grasses.
Elphick identifies the rare saltmarsh sparrow by the yellow shading on its face and the crisp dark streaks on its breast….
Source: Waterconserve News

Source: Water Industry News

Global Warming Could Take Its Toll Down The Shore Sooner Than Many Expect

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CBS: A Florida based geologist has some dire warnings about climate change. Among them, many of the barrier islands along the Jersey shore could be under water in as little as 50 years.
Professor Harold Wanless chairs the Geological Sciences Department at the University of Miami. He suggests the feds are grossly underestimating the rate at which sea levels are rising because the polar ice caps are melting so rapidly.
His advice? Towns along the shore should start preparing now.
“As sea level…
Source: Waterconserve News

Source: Water Industry News