NYC-WTC_000212701

NYC 9/11 Public Portal Document

M r liernard P. Orlan May .23,2002 Indoor ,Air C'eality Asses.sment Page 2 _________________ Al (Mh2ojecX No jJ/X-Jeb -’2 ‘ *

lie result." of the sampling represent conditions found on the dales of the survey and m.ay not represent conditions tbu id al other times. 1 he information presented m this repo t should be used by the BOE as a guide to iissos the need for further improvements in current indoor air qualiiy control activities.

EVALI'ATION CRITERIA

Currently, there are no regulatory standard.s for indoor air quality m non-induslrial buildings, such us oftices and schools. For the real-time data collected. ATC uses the commonly accepted gLiidclmc.s cited in the following publications;

far Accepidble l>icli)/>r Air Quality (ASHRAE 62-l9’AJy American Socielv of Healing. Refrigerating, and Air-(’ondilioning Engineers (ASHRAE); T/i.’i»iai Enriroiiimaitiil Coiiilititrn'i /dr J/iimaii Occupancy lASl/RAE 53-/992): Iiic'nslrial [fygienistr Guide Id finloDr Air Quality /nvesii^atians (1993), .American Industrial Hygiene Association (AIHA).

table 1 lists target guidelines for the parameters that ATC evaluated during this investigation. Meeting one, some, or all of the li.sted values does not assure that acceptable indoor air quality will be achieved at all limes.

TABLE 1 TARGET GUIDELINES FOR INDOOR AIR QUALITY PARAMETERS EVALUATED PARAMETER TARGET LEVEL AGENCY OR ORGANIZATION ('arbon Dioxide <701) [lart.s per million (ppm) ASH R AE 62 (m2)_________ above background level ('arbon Monoxide 9 ppm ASHRAE 62 (adopted from (CO)_____________ USEP.A NPAAQS) Respirable 65 micrograms per cubic meter IJSEPANPAAQS Particulates (PM2.5) of air (pg/m-) 24-hour average 40 pg'24-hour average USEPA recommendatit'n tor children/sensitivc individuals Temperature Summer: 73-79°F at 5()'T RI 1 ’^fR/AETS W1 liter: 6S-75M-at50% RH Relative ! lumidity 30 ■ 60 'S, ASI I RAE 55 Total Volatile Organic (’(impounds I ppni AltlA (TVOC) ESEPA ~ I lilted States Environmental Protection Agency NI’AAQS National Primary Ambient-z\ir Quality Standard AIIIA = American Industrial Hygiene Association

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