A study of gull eggs shows that more chemicals used as flame retardants are
showing up in the environment. Chuck Quirmbach reports:
Transcript
A study of gull eggs shows that more chemicals used as flame retardants are
showing up in the environment. Chuck Quirmbach reports:
Flame retardants on clothes and other products have reduced deaths and
injuries caused by fires. But the compound traditionally found in retardants,
polybrominated diphenyl ethers, or PBDE, has found its way into many water
bodies and even into women’s breast milk.
A few years ago, after concerns about the compound being linked to health
problems in wildlife, makers of PBDEs began to phase out some types of it. A
recent update of a study of herring gull eggs around the Great Lakes has found
that levels of the phased out chemicals have been dropping, but research
scientist Robert Letcher of Environment Canada says there’s also bad news:
“Flame retardants that are replacing them commercially are starting to show up in
the gulls as an indicator species. And for example, there’s the replacement flame
retardant callled deca-BDE. That’s what we’re seeing going up.”
Letcher says there could be long-term health concerns for both wildlife and
humans.
A new study by an environmental group says there are high
concentrations of toxic chemicals called PBDE’s and phthalates inside many cars. The Ecology Center is calling for the chemicals to be phased out. The Great Lakes Radio Consortium’s Tracy
Samilton reports:
Transcript
A new study by an environmental group says there are high
concentrations of toxic chemicals called PBDEs and phthalates inside
many cars. The Ecology Center is calling for the chemicals to be phased
out. The Great Lakes Radio Consortium’s Tracy Samilton reports:
PBDEs are used as flame retardants in auto parts, and phthalates make
plastic parts more flexible. The study found that the heat that builds up
inside a car in the sun causes the chemicals to be released, which
increases exposure to humans.
Jeff Gearhart of the Ecology Center says there are plenty of safer
alternatives and the auto industry should use them. He says there are not
many studies on the effect of the chemicals on humans, but animal
studies show that they hurt reproduction and brain development.
“We should take a precautionary approach and we think that’s the
type of approach that many people take in their own lives.”
A spokesperson for the Alliance of Automobile Manufacturers says
flame retardant PBDEs make cars safer for people in the event of a fire,
and that PBDEs and phthalates are both safe.
Water contamination from sources that might include some wastewater treatment plants closes some beaches. (Photo by Lester Graham)
Municipal sewer plants are sometimes blamed for high E. coli bacteria counts that close beaches to swimmers. Some cities are working to find better ways to treat the water and put it back into nature. The Great Lakes Radio Consortium’s Chris McCarus reports:
Transcript
Municipal sewer plants are sometimes blamed for high E. coli bacteria counts
that close beaches to swimmers. Some cities are working to find better ways to treat the
water and put it back into nature. The Great Lakes Radio Consortium’s Chris McCarus
reports:
(sound of cars moving along a small street and a few people talking)
A typical summer day by the lake: SUVs pull boats on trailers. People saunter from an
ice cream shop to the city beach. Jet skis and water skiiers slice through the waves.
Carpenters raise trusses on homes being built into the remaining lakefront lots.
Just a few years ago it seemed towns like this were just for loggers and locals. But now
people are flocking to the lakes around the Midwest and staying there. And that’s putting
a strain on local sewer plants.
(sound of machines inside the water treatment plant)
For 40 years, the treated waste water from the Boyne City, Michigan sewer plant has
been released into the big lake it was built on…Lake Charlevoix.
“It’s located right adjacent to a public swimming beach, park, marina and some valuable
waterfront property. We are only a block off the downtown district.”
Plant manager Dan Meads wants to stop mixing the end product with the water where
tourists and the locals swim and play. He tests daily for E. coli bacteria. He
doesn’t want anyone getting sick. But it’s still a concern, and there are other concerns.
In recent years, the United States Geological Survey has reported on new kinds of
contaminants that they’ve found in ground and surface water. The USGS says treated
wastewater from sewer plants can contain hormones from birth control pills, antibiotics,
detergents, fire retardants, and pesticides.
USGS microbiologist Sheridan Haack says the effects of all these compounds are still
unknown. Most are found in tiny quantities, but combined they could cause any number
of chemical reactions.
“There are many different chemical structures and it would be very difficult to state for
all of them what we would actually expect the environmental fate to be and how they
would actually be transported through the environment.”
Haack says the medicines people take don’t disappear. They eventually leave the body
and are flushed down the toilet. Those drugs have been tested for safe human
consumption, but the question is: what happens when those chemicals are mixed in with
industrial waste, accidental spills and nature’s own chemical processes? Haack says they
just might come back around to hurt humans, fish and wildlife.
The Boyne City solution is to build a new wastewater treatment plant two miles from the
beaches up the Boyne River. Officials say contaminants will be diluted by the time they
flow back down into Lake Charlevoix.
(sound of the Boyne River)
Larry Maltby volunteers for a group called “Friends of the Boyne River.” The group
doesn’t like the city’s plan to discharge treated wastewater directly into the river. It wants
them to consider some non-traditional methods. They say the new sewer plant could run
a pipe under a golf course or spray the treated water on farm fields… or let it drain into
wetlands to let nature filter it out.
“It will seep into the soils which are very sandy and gravelly underneath the golf course
and then the filtration through the ground will have a great deal of effect of continuing to
purify that water. Much more so than it would be with a direct deposit, straight into the
surface waters of Michigan.”
Lawyers for the Friends of the Boyne River have appealed to the state dept of
environmental quality and filed a lawsuit.
But wastewater treatment plant manager Dan Meads says the city doesn’t want to please
just one group and end up angering another…
“There isn’t any guarantee that you can satisfy everybody. We think we have the best
option available.”
As municipalities are short on funds and personnel, they don’t want to wait for decades
for the perfect solution. Still, nobody wants any amount of pollution to affect their home
or their recreational area.
Sheridan Haack with the USGS won’t take either side in this dispute. She says not only
are the dangers from contaminants unknown, the best way to deal with them is unknown.
“I am not aware of any consensus in the scientific community on the nature or types of
treatment for this broad range of chemicals.”
In the meantime… communities such as Boyne City have the unenviable task of trying to
dispose of their residents sewage without polluting the beaches, the fishing, and the
environment that brought folks there in the first place.
For the Great Lakes Radio Consortium, I’m Chris McCarus.
Chemicals known as PBDE’s are used as flame-retardants in many products. But PBDE’s have been showing up in people and in wildlife. Now, one of the biggest manufacturers of PBDE’s has announced that it will be phasing out the chemical. The Great Lakes Radio Consortium’s Mark Brush has more:
Transcript
Chemicals known as PBDE’s are used as flame-retardants in many products.
But PBDE’s have been showing up in people and in wildlife. Now, one of the
biggest manufacturers of PBDE’s has announced that it will be phasing out
the chemical. The Great Lakes Radio Consortium’s Mark Brush has more:
Some animal tests have shown that PBDE’s can be toxic – but the EPA says
it’s “not yet concluded that the chemicals are an unreasonable risk to human
health.”
However, the Great Lakes Chemical Corporation has announced that it will
voluntarily stop producing a widely used PBDE, known as Penta, by the end of
2004. This chemical is used mostly to prevent fires in furniture cushions.
Anne Noonan is with Great Lakes Chemical. She says the company started
developing an alternative in the mid 1990’s when research began to show that
PBDE’s gets into the environment and eventually the food chain:
“We understood that it did bioaccumulate and there was growing public
concern that this would start building up in the environment. So with that
in mind, we started developing this product.”
The new product is called FireMaster 550, and according to the EPA, initial
tests have shown that this chemical should be safe.
For the Great Lakes Radio Consortium, I’m Mark Brush.
