How scientists uncovered a massive underwater waste dump off Los Angeles.

How scientists uncovered a massive underwater waste dump off Los Angeles

A sprawling dumpsite off the Los Angeles coast, littered with barrels of waste, had been mostly hidden from the public eye for over half a century. Now, marine scientists revealed the field of submerged waste, some of it likely toxic.

They detected around 27,000 barrels.

Over two weeks in March, scientists with NOAA and the Scripps Institution of Oceanography dropped two autonomous underwater vehicles (they look like small submarines) into the ocean, approximately 12 miles off the coast. The researchers knew barrels holding waste laden with toxic chemicals like DDT were down there: Limited, though telltale footage and past records hinted at the magnitude of last century's massive dumping campaign. But the robots, using sonar technology to scour 36,000 acres of the seafloor, proved it.

"It was staggering to us," Eric Terrill, chief scientist of the expedition and an oceanographer at Scripps Institution of Oceanography, told Mashable. 

Some records suggested hundreds of thousands of barrels had been dumped off the Los Angeles coast between 1947 and 1961. The researchers suspected they might find a plethora of waste. "But to visibly see it in the data was pretty humbling," Terrill said.

"It was staggering to us" Scripps announced the expedition's results earlier this week. The discovery opens a floodgate of environmental and biological questions for local, state, and federal agencies. How is this impacting marine wildlife? How contaminated is the seabed? "There are implications across the entire food web, all the way to humans, that we don't understand just yet," explained Terrill.

"Are those chemicals moving into the food web or are they staying somewhat in place? We don’t really know," agreed Katherine Pease, a biologist and the science and policy director at Heal the Bay, an environmental advocacy group in LA.

It's unknown if the waste, some at depths of 3,000 feet underwater, can be cleaned up, or should be. An endeavor that might disturb contaminated soil could spread toxins, making matters worse. "It is a huge, overwhelming problem to think about," said Pease. "Are there options for cleaning it up? Or is it better to leave [the barrels]?" These questions will take years to answer. 


Another question is who's responsible for the dumping? One infamous company, the now-folded Montrose Chemical Corporation, is already known to have been a serial dumper, because dumping was permitted in the mid-20th century (before the EPA existed and the agency instituted the Ocean Dumping Act), though other companies may have dumped too. Montrose — once a major supplier of the since-banned insecticide DDT — is already culpable for discharging bounties of toxic waste into LA County storm drains and sewer systems, resulting in massive DDT contamination off the coast (specifically the Palos Verdes Shelf). But the chemical company is also known to have dumped many DDT-contaminated waste drums in the region, according to NOAA.

Locating the drums was made possible by sonar technology. In a basic sense, the underwater robots beamed sound pulses to the seafloor, and the sounds reflected back. This reveals the shape, size, and other clues about the objects down there. The vehicles swept the seafloor with broad pulses (shown in the graphic above) like a wide push broom, explained Scripps' Terrill, allowing the team to cover a large swathe of area. They determined "with high confidence" that some 27,000 objects are barrels.

On the seafloor, researchers found telltale signs of organized, large-scale dumping. "There are several distinct track-line patterns in the surveyed area, suggesting that the dumping was repeatedly done from an underway platform such as a moving ship or barge," Terrill said in a statement, noting some of the lines are 11 miles long.


While the expedition didn't reveal what's inside each barrel, many likely contain waste laden with DDT. It's a long-lived chemical that accumulates in fatty animal tissues, like those in fish and marine mammals. DDT is linked to cancer, for example, in sea lions. The EPA calls DDT a "probable human carcinogen," and recent research linked health risks in granddaughters whose grandmothers were exposed to DDT decades ago. In LA, Heal the Bay actively educates the local community and anglers about consuming certain fish known to be contaminated with DDT. Warnings are posted on local piers, too.

SEE ALSO: What Earth was like last time CO2 levels were this high

While finding some 27,000 barrels of waste is certainly stunning, it doesn't mean the beaches are suddenly dangerous — though eating contaminated fish is potentially harmful. "[The detection of barrels] is alarming, but not an immediate cause for not going in the water," said Pease. 

It's not just barrels discarded on the seafloor, however. The robots identified around 73,000 other objects. For now, it's unknown what they are.

"There’s a whole lot of other stuff on the sea bed that is unfinished business," said Terrill.

Comments

  1. And this surprises anyone???

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  2. Congratulations u have just successfully showcase human rights. Japan doing the same thing because they're sucking the same dick despite knowing the nuke they got from them. Well done! United Nations has got your back! Just kick in the whole dick into your stomach like the Australia did.

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  3. California democrat waste management. Democrats ruin everything for everyone.

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    1. Read the article, Trumper. Evidence shows that these barrels were dumped from the late 40s to the early 60s, when CA was a Republican stronghold.

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    2. The same people that are the democrats today!

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    3. The twists you make.. all to fit the narrative you want. Doesn't surprise me that someone willing to say such nonsense.. didn't read the article.. which is a common theme.. ignorance comes from a lack of research

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  4. Outrages! Scandalous! #EnvironmentalJustice #ocean

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  5. DDT was just an over used insecticide. Much money was tossed at finding if it ever caused softened shells in birds and no link was ever found. The myth should be allowed to die.

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  6. Charge them with what? Presentism? What they did was perfectly legal at the time.

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    1. The numbers are not as important as finding out who gave the permission to dump toxic chemicals into ocean off California. If they are still alive, charge them!. We also must make sure this type of environmental genocide never happens again.

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    2. "The logs showed 2,000 barrels of DDT-laced sludge were dumped in the deep ocean each month from 1947 to 1961 off Catalina, and other companies also dumped there until 1972."
      This math doesn't work at all. 1961 - 1947 = 14 years. 14 years x 12 months per year = 168 months. 168 months x 2000 barrels per month = 336,000 barrels. Where does the 27,345 figure come from? Are the other 308, 000+ barrels in a different location? Or are one of the factors wrong? No matter how the numbers are sliced though, it's still terrible that we treat our home planet like a porta-potty at a hippy music festival. Even if it was due to the ignorance of the times. I have to admit that I cringe with guilt at some of the stuff we tossed overboard prior to entering port returning from deployment. Pretty much everything in the Hazmat and the paint lockers that was beyond shelf-life was chucked over the side before we got back inside the 12 mile limit. Literally thousand of gallons of marine grade paints, solvents, and other chemicals. Back then the prevailing attitude was, "Hey it's a big ocean. It can take it all".

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  7. One of many!! Turning our waters into antifreeze !And we are worried about global warming

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  8. And the ocean is global, so this actually effects everyone. Environmental crimes need to get more focus, more resources and higher punishments. Especially those that hit the wallets of those greedy, careless executives and owners.

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  9. I hope they catch who put them out there .and Barry them out there with it.

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  10. Trumf had a dump,what would you expect.

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  11. And another 500 mile long waste dump just east of the underwater one that was found

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  12. "How scientists uncovered a massive waste dump named Los Angeles" There, fixed the headline for you.

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  13. No wonder there, this are the countries that legally hunt whales: Canada, Iceland, Japan, Norway, Russia, South Korea, the United States and the Danish dependencies of the Faroe Islands and Greenland. In 2019 Norway has surpassed Japan for its daily quota, and is now officially the country that kills most whales in the world. Also France is one if not the biggest killer of dolphins. so there you go this are the main culprits.

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  14. There’s got to be some dead bodies in those barrels

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  15. Didn’t anyone see Men at Work, tsssh

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  16. That's them dems for you. Does not surprise me at all. What I am surprised about, is that this is the only thing that's been found. I'm sure more will pop up

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  17. Anything goes, to make a dollar.

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  18. This comment has been removed by a blog administrator.

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  19. Any fish there?

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  20. Must have been dumped by Terry Silver...

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  21. Yep. USA do dump waste in their own area. Its nothing new. I used to live near a really toxic waste dump growing up that was turned into residential areas and I feel sorry for the people living on that land

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  22. Hopefully a pandemic will wipe the scourge of the world right off the face of the earth.

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