CDC press conference notes regarding anthrax investigation, undated

ZS0ZS1L000 OLM-OAN ‘Hb NEW YORK TIMES, THURSDAY, OCTOBER 11, 2001 “A NATION CHALLENGED: The Aftermath in New York i THE AIR QUALITY gContaminants Below Levels \for Long-Term Concerns By KIRK JOHNSON “vez “with ANDREW C. REVKIN “The quality of the air has become a .. jatter of widespread anxiety among ‘? people who live or work in Lower ee oo Manhattan — anxiety compounded iit Many cases by open disbelief in assurances from government and *-piblic health officials that the air, ow whilé acrid and sometimes smelly, is bu “penal safe to breathe. ares “Local residents and workers in “downtown buildings say they fear . that, burning eyes, runny noses and ae ‘scratchy throats — common mala- “nies below 14th Street, especially at “i night — could be an indicator of .-:Something worse that is not being "ee at all. For many people, gj dhe,plume of dust and smoke that -- continues to be a presence downtown or Pas. become part of the nightmare itself; in an altered New York, even 2 >. the, air, it seems, is no longer what it as. axis “But independent testing by a com- -» pany hired by The New York Times ~n-has concluded that the outdoor street level air in the vicinity of the trade >. center site does not contain poisons ~n. Of toxic substances, especially lead :.,and asbestos, in levels sufficient to raise. long-term public health con- cern, The results, according to the report by Adelaide Associates of Brewster, N.Y., essentially mirrored the findings that have been reached and“widely reported by the federal Environmental Protection Agency. “Adelaide’s conclusions support e E.P.A. and New York City claims t there are no significant health ’ risks,” the report said. * Adelaide sampled air for asbestos and lead and fine particle dust and found that, in all three categories, in levels were below the federal govern- “4 Ment’s health standards. One of the *“Company’s four monitoring stations, $e at the corner of Rector and Green- iS exceeded the E.P.A.’s safety i Senlard for asbestos, but was below “>*he standards set by the Occupation- “© a] Safety and Health Administration. ==? Air testing, how it works and what it “‘¥pveals or does not, has become part of the uneasy fabric of life in the on eo vareas around the disaster site. And . -2 health experts stress that the risks to 22.workers directly at the ground zero nq Cleanup site are genuine. Respira- 1s tory protection for cleanup crews, wisPhysicians say, remains essential. =) Volatile organic compounds like ben- zene, for example, have been meas- ured directly in the smoke plume itself, but disperse so quickly into the environment that sensors a block or two away show no measurement at all. But the experts also say that the raging, often emotional debate about air issues downtown, many of them revolving around the question of as- bestos, have left many residents deeply misinformed about the rela- tive risks of exposure that they do face every day. And government tests that turn up negative do not seem to explain everything, either. Why, for example, does the air these days make a person’s throat feel so raw and ragged? Health experts say there are also many unknowns about the exact mix- ture of elements that people were exposed to in the early days after the attacks, when the smoke and dust were at their worst. Some predict that there could be more cases of asthma in the city over time, though most say that one-time exposures, even if severe, are generally shrugged off by the body. Different ways of measuring asbestos have also raised concerns that the govern- ment tests do not pick up supersmall particles of asbestos fibers that might be dangerous. But the results obtained by The Times, and interviews with inde- pendent health experts around the country and at the E.P.A., also sug- gest strongly that emotion and anxi- ety have elevated concerns about the air far beyond the levels shared by most scientists and public health ex- perts. “There’s little risk to the general public of any ongoing air pollution related to the World Trade Center,” said Patrick L. Kinney, an associate professor of environmental health sciences at Columbia University, who has monitored air testing results and was briefed about Adelaide’s findings. Professor Kinney and other ex- perts say that the raw throats and sinuses that many residents and workers complain about are in fact mostly evidence of the body’s defen- sive systems. Large particles of dust that get trapped in nasal and throat trigger irritation, but that- also means that most of the particles are not making it all the way to the lungs. Smaller particles, called respira- ble dust, which can penetrate deeply into the lungs and are a greater health concern, were not found in significant quantities at street level MANHATTAN ~ .¥ a Air Quality Readings Results of safety tests at four stations downtown. 123 4 L stations » LEAD SMALL PARTICLE DUST ASBESTOS micrograms per milligrams per Structures per cubic meter cubic meter square millimeter” 50 5 a SAFETY LIMITS "E.P.A. standards The New York Times Nicole Bengiveoo/Tbe New Yor Times An environmental scientist removing an air quality sample from an Environmental Protection Agency station near Pine and William Streets. Downtown residents are worried about what they may be breathing. by Adelaide, which also confirms re- cent government tests. Other concerns have been raised about supersmall particles of asbes- tos. Recent news reports have sug- gested, for example, that the small- est asbestos fibers, smashed into tiny pieces by the cataclysm when the twin towers collapsed, could be more dangerous than the 0.5 micron-and- larger size that are measured by the E.P.A. and most testing organiza- tions, including Adelaide. Scientists say that there is genuine debate on that point, but that by an overwhelming number, studies on asbestos exposure have found the larger particles to be far more dan- gerous because they tend to embed themselves in lung issue. Smailer fibers, though they can penetrate more deeply into lungs, can also be more readily attacked and removed by the body’s internal defenses, most studies say. Other impressions by residents do have a basis in science, environmen- tal experts said. For example, there appears to be a tendency for the smell and air quality to worsen at night, and this is consistent with the way air circulates in the city, said Dr. Genree 1D Thirctan an acencines professor of environmental medicine at the New York University School of Medicine, who is involved in a study analyzing the constituents in dust and soot. He said winds that tend to sweep pollution away during the day gener- ally ebb at night. He also said that as pavement and buildings cool at night, there are fewer updrafts of warm air that stir the atmosphere and blend clear air from higher elevations with dirtier air near the streets. The result, he said, is that the faint persistent plume of emissions from the attack site “is sort of prowling the city overnight, meandering. And that’s what they’re smelling.” - ‘He, too, agreed with the authorities that there was no sign of a clear health risk to residents, but he quick- ly added that “prudent avoidance remains the best approach for any resident or worker downtown.” “It’s a basic public health princi- pal,” Dr. Thurston said. “If you can avoid an exposure, you do so.” Peter M. Iwanowicz, the director of environmental health for the American Lung Association of New York State, said his organization had been receiving calls from a steady String of residents unnerved by the persistently acrid air. “The visceral human reaction to this is, this smell is not natural, so there must be something wrong, something toxic,” he said. But, he added, smells can be a red herring: “Take a skunk. What it lets loose is pretty noxious, but it won’t hurt you, Compare that to carbon monoxide, which is odorless and can kill you.” Over all, he said, the lung associa- tion still tends to agree with public officials that any threat is limited to possible aggravation of breathing problems in people prone to asthma or other respiratory ailments. Other experts say there may be other air issues yet to emerge. Al- tered traffic patterns and increased congestion from heightened security at the city’s bridge’s and tunnels, for example, have created long lines of idling vehicles, which pollute the’ air far more than cars and trucks mov- ing on the highways. Exhaust from gasoline-fired electricity generators and diesel vehicles involved in'the cleanup are another issue should be monitored over time, they say. ' But raw throats and sore eyes, one environmental expert said, should generally be likened to the effect of sitting by a campfire. “If the smoke gets in your eyes, they burn, but it doesn’t mean you're going to go blind,” said Donald R. Blake, a professor of chemistry at the University of California at Irvine. “This is a tough thing that people in New York are dealing with,” he said. “But we' re. talking here’ about a nhace onan. L. B13 * yUaWNDO |BNOd I!IGNd 11/6 DAN