NYC-WTC_000212711

NYC 9/11 Public Portal Document

Mr. Bernard IL Orlan ■May 31). 21)02 Indoor Air Quality .Assessment Page 2 P S. 234M A TC Prtnect No. 15-19125-0279

I lie results id the sampling lepresent conditions found on the dates of the survey and may not represent conditions found at other times. The information presented 111 this report should be used by the BOE as a guide to assess the need for further improvement.s in current indoor air quality control activities.

EVAU ATION CRITERIA

(Li nciitly. there are no regu aioiy standards for indoor air quality m non-industrial buildings, such as ofl CCS and schools, f or the real-time data collected, A'KL uses the commonly accepted guidelines cited in the following publications:

i’ciiii/iilto'! for Acfe/?lah/e /nihxir Air Qiuililv (AS/JJ{AE 62-/999), American Socicts of Heating, Refrigerating, and Air-(Ynditioning Engineers (ASHRAE); TIti’iinal Eiivirtfiiinciiial Coiidilioiis (or Hii/iiiiii Occupancy iASHRA// 55-/992): Iiiciciiriiil /lyyicniaia Guide lo /iidoor Air (Jiudily /fo'c.snydtiohs (1993), American Intiustrial Hygiene Association (.AULA).

lablc 1 Irsis target guidelines for the parameters that ATC evaluated during thi.s investigation. Meeting one. some, or all of the listed values doe.s not assure that acceptable indoor air quality will be achieved at all times.

TABLE I TARGET GLIDELINES FOR INDOOR AIR QUALITY PARAMETERS EVALL Al EI) PARAMETER TARGE! LEVEL AGENCY OR ORGANIZATION (.'arbon Eio.xide <700 parts per million (ppm) ASHRAE 62 ____________ above background level Carbon Monoxide 0 ppm ASHR/AE 62 (adopted from JCO)__________ __ USEPA NPAAQS) Respirabe 65 micrograms per cubic meter USEPA NPAAQ.S ParticLila e> (PM2 s) of air (pg/m^ ) 24-hour average 40 pgfm^ 24-hour average LISEPA recommendation for children/sensitive individuals Tempera lure Summer: 73-79°F al SOV, RH AM I L AI 55 Winter: 68-75°F at 50% RI I 'Relative Humiditv 3ic^)b fii ASHRAF; 55 Total Volatile Organic 'Tompounds 1 ppm All IA (TVOC) USEPA = United States lYivironnienlal Protection Agency NPAAQS " National Primary Ambient-Air Quality Standard AULA = American Industrial Hygiene Association

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NYC-WTC_000212712