risks - The Environment Report

Treated Lumber a Health Hazard?

A just-released study by two environmental groups has found high levels of arsenic on the surface of pressure-treated wood products. The Environmental Working Group and the Healthy Building Network tested pressure-treated wood purchased from home improvement stores in 13 cities. In releasing their findings, the groups are calling for a ban on the use of the lumber in construction. Their findings add to the growing concern about the safety of the chemicals used to treat this wood. Those chemicals are now being re-evaluated by both the Canadian and American governments. But as the Great Lakes Radio Consortium’s Karen Kelly reports, the two governments are approaching the issue differently:

Transcript

A just released study by two environmental groups has found high levels of arsenic on the surface of pressure-treated wood products. The Environmental Working Group and the Healthy Building Network tested pressure-treated wood purchased from home improvement stores in 13 cities. In releasing their findings, the groups are calling for a ban on the use of the lumber in construction. Their findings add to the growing concern about the safety of the chemicals used to treat this wood. Those chemicals are now being re-evaluated by both the Canadian and American governments. But as the Great Lakes Radio Consortium’s Karen Kelly reports, the two governments are approaching the issue differently.

For years, Don Houston at the Canadian Institute of Child Health has been calling for warning labels on pressure-treated wood. The lumber is used in playground structures and picnic tables throughout North America. And it’s treated with a preservative called Chromated Copper Arsenate, which protects the wood from insects and fungi. The preservative is made from arsenic, chromium and copper. And Houston says children who are exposed to the wood may be exposed to those chemicals, as well.

“It’s not just children’s play structures. I’d rather suspect even more problematic is the deck that’s on the back of their house because often times children spend more time there. It’s all sorts of structures that are put in outdoors – decks, balconies, retaining walls; even the telephone pole that might be in a schoolyard might be problematic.”

Houston says the problem arises when arsenic and chromium, which are both carcinogens, remain on the surface of the wood. A study of ten playgrounds conducted by Health Canada in the late 1980’s detected both substances on the surface of play structures made with pressure treated wood. Arsenic and chromium were also found in the nearby soil. Health Canada warns people who work with pressure-treated wood to wear gloves and a mask and to thoroughly wash clothing and exposed skin once they’re finished. The agency also warns against burning pressure treated wood. But Houston says there are still no guidelines for children.

“It doesn’t make a lot of sense for the guy who’s building it to use gloves and then the child ten minutes after it’s built to be walking over it and running on it barefoot and having greater potential health impact from the exposure.”

But scientists at Health Canada say the research findings have been mixed. They point to studies conducted by the U.S. EPA in the late 1980’s that found minimal health risks. Now, fifteen years since they last evaluated these chemicals, both Health Canada and the EPA are taking another look. The update is required by law in both countries. Richard Martin is a toxicologist at Health Canada’s Pest Management Regulatory Agency. He says the presence of arsenic is not always a cause for concern.

“Although there’s a number of reports out there of arsenic being found in soil, and although they’re useful, arsenic is found in all soil. So we need to go the extra step to determine to what extent there’s potential for exposure to children and that type of thing.”

Martin says his agency is reviewing research to determine the effect of exposure on both adults who work with cca-treated wood and children who play near it. But the U.S. Environmental Protection Agency is taking the review a step further. Jim Jones, the deputy director of the EPA’s office of pesticide programs, says they’re concentrating on the exposure to children first.

“It was the children’s exposure through cca-treated wood we think are the most important to look at as they’re the group in the population that is likely to have the greatest exposures, just because of the way in which they interact with playground equipment and on decks.”

The EPA also plans to take soil samples near cca-treated wood structures in 75 playgrounds around the United States. And it’s considering a recommendation that people apply sealants to pressure-treated wood in the interim. The EPA’s scientific advisory panel suggested the agency take that measure. The EPA and Health Canada are collaborating on the re-evaluation – sharing their findings and their recommendations. Don Houston of the Canadian Institute of Child Health hopes that will lead to legislation in both countries that will restrict the use of this lumber in places where children play. The EPA and Health Canada are expected to announce their recommendations next spring.

For the Great Lakes Radio Consortium, I’m Karen Kelly.

Epa Limits Pesticide Exposure for Children

The Environmental Protection Agency is increasing restrictions on two pesticides that are used on food children frequently eat. The Great Lakes Radio Consortium’s Lester Graham has this report:

Transcript

The Environmental Protection Agency is increasing restrictions on two pesticides that are used on food children frequently eat. The Great Lakes Radio Consortium’s Lester Graham reports.

Under recent federal legislation, the E-P-A has been required to review all classes of pesticides and their potential affects on children. That’s because kids are considered to be more vulnerable to any adverse effects than adults. The new restrictions affect two chemicals, azinphos-methyl and phosmet. They’ve been used to ward off insects from certain fruits, nuts, and vegetables for 35 years. But, the E-P-A has stated that azinphos-methyl, which is sold under the trade names of Guthion, A-P-M, and Sniper, poses an unacceptable risk to children six and under. So use of the pesticide is being restricted. Farmers will phase out use or no longer be able to use it on nearly 40 different crops. Phosmet is sold under the trade name Imidan. The EPA is further tightening its use on nine fruits, including apples, grapes, and peaches. For the Great Lakes Radio Consortium, this is Lester Graham.

Preparing for Bioterrorism

State health departments, emergency management agencies and doctors throughout the Great Lakes region are re-examining their emergency plans after the terrorist attacks of September 11th. Officials say they need to increase their planning to prepare for a bioterrorist attack. Such an attack could mean the release of deadly diseases into a general population and officials say there’s no way the public health structure could handle such an outbreak right now. The Great Lakes Radio Consortium’s Tom Scheck has more:

Transcript

As the nation tries to recover from the terrorist attacks in Pennsylvania, New York and Washington DC, infectious disease experts are using the tragedies to highlight that the nation’s skies and borders are not the only things the federal government needs to worry about. Those experts say the nation needs to also start preparing for a bioterrorist attack. The University of Minnesota’s Michael Osterholm is one of the leading experts on infectious disease and bioterrorism in the nation. He says it’s unlikely that a terrorist is equipped at this time to release a deadly disease like anthrax or small pox. But he says the events on Tuesday, September 11th have redefined terrorism in the United States. And he says the country is currently ill equipped to handle a biological outbreak.

“We’re a country right now, that if we have a slight increase of influenza cases in the wintertime we close down our hospitals because we have no excess capacity, we don’t have the health care workers or the beds. Now you tell me, given that backdrop, what it will mean when 250 or 300,000 or 400,000 people suddenly come down with smallpox or anthrax.”

Osterholm says if those biologic agents, or others like them are released in an American city, it could, over time, make thousands of people sick. And he says the highly contagious diseases would rapidly transfer from person to person, making it difficult for doctors and public health officials to contain the outbreak. On top of that, Osterholm says most such diseases wouldn’t show their symptoms for 3 or four days. He says that could stretch the state’s public health departments thin as they try to track down who’s infected and who’s not.

“We run much of public health in this country on what I would call the equivalent of running O’Hare air traffic control tower on tin cans and string. Yet that’s going to be the system that’s going to respond to bioterrorism.”

Osterholm and others are lobbying the federal government to allocate billions of dollars to improve the community response rates of public health and emergency personnel throughout the country. He also says the country needs to start stockpiling vaccines for smallpox and anthrax. Since the last human case of small pox was eradicated in 1979,
Osterholm says officials haven’t seen the need to continue vaccinating against the disease. Anthrax, on the other hand, has a vaccine but can also be treated with antibiotics if the disease is caught early enough.

The threat of a bioterrorist attack is not only worrying public health officials but also the emergency room doctors who will be treating infected patients. In addition to running the risk of contracting the same infections they’re treating, emergency room doctors say the threat of bioterrorism adds to an already busy schedule of treating cuts, gashes and gun shot wounds. Now physicians, like Pat Lilja who works at North Memorial Medical Center in the Twin Cities, say they have to watch out for rare illnesses as well; for instance, rare flu-like cases in the summer.

“You don’t know about it until people three or four or five days later suddenly start coming into hospitals sick. So you don’t have this big, all of a sudden, something’s going on. What you have to rely upon are your hospitals, primarily your emergency departments, to say we’ve seen twenty patients today all with this same problem and we usually see one a month.”

Lilja and other emergency room physicians’ say they’ve been conducting mock drills of biological and chemical disasters to prepare for any outbreaks. But he says the emergency plans at many hospitals are stuck on the dusty shelves of an administrator too worried about a declining budget rather than an event that they think could never occur. That worries Randall Larson, the director of the Anser Institute for Homeland Security in Virginia. He says hospitals need to increase their security and monitoring methods to make sure they catch any outbreak that does occur.

“We mad e a decision in this country that we didn’t want the federal government or the state government running our hospitals. They’re private corporations. Thirty percent of them are in the red today. Fifty percent of our teaching hospitals are in the red. They don’t have time to do the exercises and the training they need to be prepared to respond to a biological or a chemical attack. They got to just keep the doors open and stay out of the red.”

Larsen and others say the new federal office of Homeland Security needs to make bioterrorism a priority in the coming years. He says the FBI, U.S. Centers for Disease Control and doctors need to coordinate their efforts to make sure they respond quickly to a biological or chemical outbreak. He says the responsiveness is just as critical for those who work in public health as the quickness expected from a police officer or a firefighter. For the Great Lakes Radio Consortium, I’m Tom Scheck.