Indoor Air Quality Report, May 9, 2002, NYC School

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan May 10, 2002 Indoo ■ Air Quality Assessment Page 2 H.S. cf I^onqrnics andJmanceJM833i ATC Protect No. 15-19125-0291 The results of the sampling represent conditions found on the dates of the survey and may not represent conditions found at other times. The information presented in this report should be used by the BOE as a guide to assess the need for further improvements in current indoor air qualit/ control activities.

EVAl.UATION CRITERIA

Currently, there are no regulatory standards for indoor air quality' in non-industrial buildings, such IS offices and schools. For the real-time data collected, ATC uses the commonly accepted guidelines cited in the following publications:

Ventilation for Acceptable Indoor Air Quality (ASHRAE 62-1999), American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE); Hermal Environmental Conditions for Human Occupancy (ASHRAE S5-1992); Industrial Hygienists Guide to Indoor Air Quality Investigations (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 listed values does not assure that acceptable indoor air quality will be achieved at all times.

TABLE 1 TARtJET GUIDELINES FOR INDOOR AIR QUALITY PARAMETERS EVALUATED

PARAWfER AGENCY OR ■■■■ ________ . . . ■ ' ' , ORGANIZATION Carbon Dioxide <700 parts per million (ppm) ASHRAE 62 (CO)) above background level Carbon Monoxide 9 ppm ASHRAE 62 (adopted from (CO) USEPA NPAAQS) Respirable 65 micrograms per cubic meter USEPA NPAAQS Particulates (PM2 5) of air Ipg/m3) 24-hour average 40 pg/m^ 24-hour average USEPA - Recommendation for children / sensitive individuals Temperature Summer: 73-79°F at 50% RH ASHRAE 55 Winter: 68-75°F at 50% RH Relative Humidity 30 - 60 % ASHRAE 55 Total Volatile Orgi.nic Compounds 1 ppm AIHA (TVOC) USEPA = United States Environmental Protection Agency NPAAQS = National Primary Ambient-Air Quality Standard AIHA = American Industrial Hygiene Association

CONFIDENTIAL, CITY_21MC100_003462523 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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