Fax cover sheet, 105 Duane Street site file

NYC 9/11 Public Portal Document

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LABOR RELATIONS Fax:212-266-320.1' Oct 22 '01 14:31 P.0E+

tom and upper rrspiratay irritsdcn. Pormaldehyde exposure at levels aboye O1 PPM can cause upper aspiratory in,txdon in some workers (ICnebss.lt95). Fo' nneldehyde is an aldehyde decocted at )usher levels in oatnbustion ::Hoke. It is also released by buildrns materials such as parLcic boards furaisbiags, and cigarette bmoke. Formeldahyde levels in now bousca ge aeraJly (a11 within a rannc of 0.05-0.2 PPM (ATSDR-1996). OSHA 'es rej dates exposure to forauldah,dc at 075 PPM average over an bmu- day $ and 2 PPM for a short rant. The ACOIH rccoaunensed threshold is 0.3 PPM as a caltag liWjL The ASTDR has set a minimum IhA level for formaldehyde 0( 0.05 PPM (ATSDR-190S)

NITROGEN DIOXIDE AND NITRi C OXTDE Nitrogen dioxide and nia is oxide m products of eonrbtasdon. Both sn can cause upper gas respiratory irritation and eye irritation. OSHA has a permissrble exposure eeiligg limit of Spans peke' million for n:urogen dioxide and an eight-hour time weighted average of 25 ppm roe eiuic cedar

ELLNtRNTAL CARBON Evaluauns levels of elemental is used as a surrogate for measuring poIyaeomatie b}drocrbors (PAH). PAHi ua also known as coat an and are assoaated wiOi lung cancer. The eleaneataI earboe standard was developed for oval timing exposure to soot particles in diesst exhaust The American Conference of Goverrrrtental Industrial 1(ygioniats has a recommended thrt:shoid limit for elemental carbon of 015 millign. ms per cubic meter of air. NIOSH has a recommended limir 0( 0.05 etg/rts3.

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The lab results are attached tc this report. There are separate upon for each simple including elemental carbon. total hydrocarbons. fomsaldeb)de, and nitrogen amides. The eaten-iag eu»ari:ea each samplereault:

Famlaldehyde — Levels of fora:aldettyde were below 0.005 pprn, which is well below the minimum risk level of 0.05 ppm.

Nitrogen Dioxide (NO,)- Lev& of nitrogee die dde were below 0.4 ppm. which is below the OSHA permissible limit of 25 ppm.

Nitric Oxide (NO) -14rels of nitrogen dioxide were below 0.4 ppm, which is below the OSHA pemtlssible limit of 5 pp:a.

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NYC-WTC 000125821