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NYC 9/11 Public Portal Document

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LASCR RELPTILNS Fax:212-266-3204 Oct 22 '01 14:31 P.G4

NITROGEN OXIDES Nitrogen dioxide and nitric and. are respiratory irritants and ale 'p nciple components of diesel combustion engines. OSHA regulates exposure to nitrogen dioxide and nitric and.. Levels of nitrogen diode NO: and nitsfe; oxide NO area were sampled using personal sampling pumps operated at 0.25 liters per minute (LPN) with TEA treated molecular sieve tubes. Each ~'' samplowas analyzed by the Wisconsin Occupational Health Laboratory according to the National Institute of Occupational Safety and Health (NIOSH) analytical method 6014

FORMALDE LTDE For4aaldel~ydelevsls in sir were m.asurod using SAC treated XAD•2 tubes with samplia` pimps operated at S0 cc per minute. WOIit. analyzed the samples

ELEMENTAL CARBON Combustion products include a wide array of carbon-based particulate matter often called soot Soot particles are a mixture of polyaromatic hydrocarbae is (coal tars) and other compounds in a size range of 0.1 to 2 microns in diameter. This particulate matter is a suspect lung esrciaogon. NIOSB recently validated method 5040 for assessing exposure to diesel exhaust particulate using elemental carbon analysis. Personal and area sampling,, was conducted following method 5040 using sampling pumps and open face Quartz Liters.

Eaposura Criteria TOTAL,HYDROCARBONS The organic compounds most commonly reported ire combustion include formaldehyde` ben zcne, scetaldshyde, polya omatic hydrocarbons. The U.S. EPA have published a database of a number of volatile organic eompo~snds measucd as part of the TIME and BASE studies. These studies measured VOCs is indoor and outdoor air at over SO randomly sdecu d buildings (merman-2999). Orijanic vapors (volatile organic compounds) can illicit health effects such as eye. nose and throat lmtatioe. These effects are depsndeat upon be VOC compounds present is the air and their ooaoepaadona. Exposures to mixtures of VOCs in buildings may cause symptoms of beedaehe and fatigue. There are no regWstory standards for tool hydroruboas in air. As a geasral guidolina, most office buildings have levels of hydrocarbons below 1 milligram per cubic mow (ms/m3).

FORMALDEHYDE Fosnvrddehyde exposure has been associated with mucous membrant ImLInizn. allergies, and possibly cancer. Exposure t4 fasmaldehybe can elicit immediate symptoms of eye,

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