Work is now being done to reduce mercury emissions. Pennsylvania pioneers an incentive program for the removal of mercury switches from cars. (Photo by Davide Guglielmo)
One of the nation’s top sources of mercury emissions is
scrap automobiles. U.S. automobiles built before 2003 used mercury in light and brake switches. When those cars are recycled, the mercury can escape into the air. Now one state in the region is working to prevent that from happening. The Great Lakes Radio Consortium’s Brad Linder reports:
Transcript
One of the nation’s top sources of mercury emissions is scrap automobiles.
U.S. automobiles built before 2003 used mercury in light and brake
switches. When those cars are recycled, the mercury can escape into the
air. Now one state in the region is working to prevent that from
happening. The Great Lakes Radio Consortium’s Brad Linder reports:
Mercury is a neurotoxin that can be found in the air, water, and soil.
Pregnant women who eat fish with high levels of mercury might see
developmental delays in their children after they’re born.
Pennsylvania is the first state in the nation to offer a bounty on mercury
switches from cars. This month, the state started offering a dollar per
switch to automobile recyclers.
Kathleen McGinty heads the state’s Department of Environmental Protection.
She says the goal is to reclaim 350-thousand switches, or nearly 600
pounds of mercury over the next two years. The material will be sent to
mercury recyclers.
“They safely take that mercury, they clean it up, they put it back into some products where it is still essential that we still use mercury.”
McGinty says the mercury can be reused in products ranging from
fluorescent lighting to dental fillings. She says mercury emissions from scrap automobiles are second only to coal-burning power plants in Pennsylvania.
For the Great Lakes Radio Consortium, I’m Brad Linder.
The Environmental Protection Agency is getting some criticism from environmental groups for their partnership with the American Chemistry Council. (Photo courtesy of epa.gov)
The Environmental Protection Agency is drawing fire from some environmental groups for accepting money from the chemical industry for a study on children’s exposure to pesticides. The Great Lakes Radio Consortium’s Rebecca Williams has more:
Transcript
The Environmental Protection Agency is drawing fire from some environmental
groups for accepting money from the chemical industry for a study on
children’s exposure to pesticides. The Great Lakes Radio Consortium’s
Rebecca Williams has more:
The EPA has accepted a two million dollar contribution from the American
Chemistry Council to help fund the exposure study.
Some environmental groups are saying the partnership is a conflict of
interest for the agency. Tim Kropp is a senior scientist with the
Environmental Working Group.
“It doesn’t make sense for them to say that there’s no influence, and that it’s
all right for the regulated industries to be involved in a study that’s
going to affect policy, or may affect policy.”
EPA officials counter that the study design has been independently reviewed.
And that the American Chemistry Council won’t be able to affect the outcome
of the study. Linda Sheldon is with the EPA’s human exposure and
atmospheric sciences division.
“The American Chemistry Council is independent of the individual companies
that produced these particular chemicals. We feel that we have complete
control over the study and control over the research findings.”
Sheldon says the information from the study will be used for future EPA risk
assessments of chemicals.
For the Great Lakes Radio Consortium, I’m Rebecca Williams.
The Duluth Seaway Port Authority's bulk cargo dock is typical of many in the port. Officials are troubled by corrosion appearing on the docks in the harbor - the steel is corroding much faster than normal. (Photo by Bob Kelleher)
A piece of steel that has been removed from a dock
wall, showing extensive pitting. (Photo by Bob Kelleher)
Engineer and diver Chad Scott (left) discovered the dock corrosion in the late 1990's, and suspects a microbiological connection. Jim Sharrow (right), Duluth Seaway Port Authorities Facilities Manager, is hoping for some fast answers. (Photo by Bob Kelleher)
Corrosion is eating away at the steel walls that hold one of the Great Lakes’ busiest harbors together. The corrosion is unlike anything known to be happening in any other Great Lakes port. But other port officials are being encouraged to take a closer look at their own underwater steel. The Great Lakes Radio Consortium’s Bob Kelleher reports:
Transcript
Corrosion is eating away at the steel walls that hold
one of the Great Lakes’ busy harbors together. The
corrosion is unlike anything known to be happening in
any other Great Lakes port. But other port officials
are being encouraged to take a closer look at their own
underwater steel. The Great Lakes Radio Consortium’s
Bob Kelleher reports:
Some kind of corrosion is eating away at the Duluth
Seaway port’s docks. The docks are those long
earth-filled metal rectangles where ships from around
the world tie up to load and unload. Those docks are
lined with sheets of steel, and the steel is rusting
away. Jim Sharrow is the Duluth
Seaway Port Authorities Facilities Manager.
“It’s corroding quickly – much faster than people expect
in fresh water. And our main concern is that we’ll lose
the integrity and the strength of the dock long before
expected, and have to do steel replacement at $1,500 or
more per lineal foot, much earlier than ever would have
been expected.”
Corrosion should be a slow process in Duluth’s cold
fresh water. But, Sharrow says, there’s evidence it’s
been happening remarkably quickly for about thirty years.
“What we seem to see here is corrosion that started in
the mid 1970s. We have steel that’s 100 years olds
that’s about as similarly corroded to steel that is 25
to 30 years old.”
It’s a big problem. There’s about thirteen miles of
steel walls lining docks in the harbor that serves
Duluth, Minnesota and Superior, Wisconsin. There’s half
again as many feet of wooden docks, held together with
steel pins. There’s corrosion on the legs of highway
bridges and the giant
steel ore docks that ship millions of tons of taconite
– a type of iron shipped to steel mills in Gary,
Indiana and Cleveland, Ohio.
“We characterize this as a 100-million dollar problem in
the harbor. It’s a huge problem, and what is so odd
about this is that we only see it happening in the
navigational area of the Duluth-Superior Harbor.”
The harbor links the St Louis River with Lake Superior.
Go a few miles up the river and there’s little corrosion
. So it doesn’t seem like the problem’s there. But, back
in the harbor, at the current rate of corrosion, Sharrow
says, the steel will fail quickly.
“I figure that in about 10 years at the current rate,
we will have to start replacing steel.”
“Particularly marginal operators could decide rather
than repair their docks it would be better for them to
go out of business, and we’re hoping that that isn’t
the case here.”
While the cause is a mystery, there’s no shortage of
theories. It could have something to do with stray
electrical voltage; water acidity; or the kinds of
steel manufactured in recent years. Chad Scott
discovered the corrosion in the late 1990’s. He’s an
engineer and a diver. Scott suspects
a micro-biological connection. He says there might be
something growing in small round pits that form on the
steel.
“We cleaned up the water. That’s the main thing –
that’s one of the main changes that’s happened since
the 70s, is we’ve cleaned up our water. We’ve cleaned
up our harbor, which is a good thing. But, when we
cleaned things up we also induced more dissolved oxygen
and more sunlight can penetrate the water, which tends
to usually promote more growth – more marine
microbiology growth.”
A team of experts met in Duluth in September to share
ideas. They came from the U.S. Navy, The Army Corp of
Engineers, and Ohio State University. And they agreed
there’s something odd going on – possibly related to
microbes or water chemistry. They also recommend that
other Great Lakes ports take a closer look at their
underwater steel. Scott says they at least helped
narrow the focus.
“We have a large laundry list right now. We want to
narrow that down and try to decide what is the real
cause of this corrosion. And these experts, hopefully,
will be able to get us going on the right direction,
so we can start doing testing that will identify the
problem.”
With the experts recommendations in hand, port
officials are now planning a formal study. If they
do figure out the cause, then they’ve got to figure
out how to prevent it. They’re in a race with
something, and right now they don’t even know with
what.
For the Great Lakes Radio Consortium, I’m Bob Kelleher.
While your bottle of water may depict this... (Photo by Ian
Britton)
...unscrewing the cap could be the same as turning on the faucet. (Photo by Ian Britton)
Over the past ten years, sales of bottled water have tripled. There’s a huge thirst for water that’s pure, clean and conveniently packaged. As part of the ongoing series, “Your Choice, Your Planet,” the Great Lakes Radio Consortium’s Victoria Fenner takes a look at why we’re turning to bottled water and whether it’s worth the price:
Transcript
Over the past ten years, sales of bottled water have tripled. There’s
a huge thirst for water that’s pure, clean and conveniently packaged.
As part of the ongoing series, “Your Choice, Your Planet,” the Great
Lakes Radio Consortium’s Victoria Fenner takes a look at why we’re
turning to bottled water and whether it’s worth the price:
On a warm sunny day, it’s easy to believe that sales of bottled water
are skyrocketing. People everywhere in this waterfront park in
Toronto are carrying plastic water bottles labeled with pictures of
glaciers and mountains. With a price tag of anywhere from fifty
cents to over a dollar a bottle, that’s a lot of profit flowing to
the companies that sell it.
But Catherine Crockett and Colin Hinz are packing water the old-
fashioned way. They don’t buy bottled water. Instead, they fill up
their own bottle before they leave home and refill it at the drinking
fountain.
Crockett: “Well, it’s cheaper and as an environmentalist, I’d rather
refill a container than waste a lot of money on pre-filled stuff that
isn’t necessarily any better than Toronto tap water. What’s the
point in paying a dollar for a disposable bottle full of what’s
probably filtered tap water anyway?”
Hinz: “Personally I think a lot of what’s behind bottled water is
marketing and I don’t really buy into that very well.”
Colin Hinz’s suspicions are shared by Paul Muldoon, the Executive
Director of the Canadian Environmental Law Association. His
organization has done a lot of research on water issues. He says the
reality often doesn’t live up to the image that companies have tried
to cultivate.
“There’s no doubt in my mind that when a person buys bottled water at
the cost they pay for it, they’re expecting some sort of pristine 200
year-old water that’s from some mountain range that’s never
been touched or explored by humans, and that the sip of water they’re
getting is water that is so pure that it’s never seen the infringement
of modern society. In reality, pollution’s everywhere and there are
very few sources of water that has been untouched by human intervention
in some way, shape or form.”
Environmentalists say it’s not always clear what you’re getting when
you look at the label on an average bottle of water. First of all,
it’s hard to tell by looking at the label what the source of the
water is. In many cases, it comes from rural areas just outside of
major cities. It can even be ordinary tap water which has been
refiltered. The U.S. Food and Drug Administration does set maximum
levels of contaminants, and some labeling requirements as well. But
they don’t regulate water which is bottled and sold in the same
state. That’s one of the reasons critics of the bottled water
industry say the standards for tap water are at least as stringent,
and often even higher than for packaged water.
Lynda Lukasic is Executive Director with Environment Hamilton, an
environmental advocacy group in Ontario. She still has confidence in
tap water, despite the fact that the water supply in a neighborhood
in Hamilton was recently shut down because of the threat of
contamination.
“I think we’d all be better to focus on ‘what is the water
supply like in the place that we’re in?’ and ensuring that we’re
offering people who live in communities safe, affordable sources of
drinking water. And going the route of bottled water does a few
things. It creates problems in exporting bottled water out of
certain watersheds when maybe that’s not what we want to see
happening. But there’s also a price tag attached to bottled water.”
Paul Muldoon of the Canadian Environmental Law Association says there
are other costs associated with bottled water that can’t be measured
in dollars.
“Some of the costs of bottled water include the transportation of water
itself, and certainly there’s local impacts. There are many residents
who are now neighbors to water facilities with truck traffic and all
that kind of stuff. There’s also the issue of bottling itself. You’ve
now got containers, hundreds of thousands… millions of them probably.
So there is the whole notion of cost, which have to be dealt with and
put into the equation.”
There are many things to take into account when you pick up a bottle
of water. You can think about the cost and whether or not there are
better ways of spending your dollar. You might think about
convenience. And whether the added convenience is worth the price. Ask
yourself what you’re really getting. Read the label to find out
where the water comes from and consider whether it’s any better than
what comes out of your tap.
The bottom line is, be an informed consumer. And keep in mind that
the choices aren’t as crystal clear as the kind of water you want to
drink.
For the Great Lakes Radio Consortium, I’m Victoria Fenner.
Work is now being done to reduce mercury emissions. Pennsylvania pioneers an incentive program for the removal of mercury switches from cars. (Photo by Davide Guglielmo)
