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

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan April 10. 2002 Indooi Air Quality .Assessment Page 2 ITS. of Economics and Finance (M833) ATC Proiect No. 15-19125-0291 The rt suits 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 quality' control activities.

EVALUATION CRITERIA

Currently, there are no regulatory' standards for indoor air quality in non-industrial buildings. such £S 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 (ASHIL4E 62-1999), American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE); Thermal Environmental Conditions for Human Occupancy (ASHRAE 55-1992j: 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 TARfJET GUIDEIJNES FOR INDOOR AIR QUALITY PARAMETERS EVALUATED

PARAMETER TARGET LEVEL 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 NP/iAQS) Resp irable 65 micrograms per cubic meter USEPA NPAAQS Particulates (PM2.5) of air (pg/m^) 24-hour average 40 ug im' 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 % ASIIRAE55 Total Volatile Organic Compounds 1 ppm AIHA (TVOC) USEPA = United States Environmental Protection Agency NPAjAQS = National Primary Ambient-Air Quality Standard AIHA =- American Industrial Hygiene Association

CONFIDENTIAL, CITY_21MC100_003462199 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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