Indoor air quality report, M833 school, June 2002

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan June 10, 2002 Indoor .Air Quality Assessment Page 2 ILS f EcononTics ari^inanceXM83Tl ATC Protect No. 15-19125-0291 ITie rc suits of the sampling represent conditions found on the dates of the survey and may not repres ent conditions found at other times. The information presented in this report should be used I y the BOE as a guide to assess the need for further improvements in current indoor air quahb' control activities.

EVAI UATION CRITERIA

Currer tly, there are no regulatory standards for indoor air quality in non-industrial buildings, such as offices and schools. For the real-time data collected, ATC uses the commonly accepted guidel nes cited in the following publications:

Ventilation for Acceptable Indoor Air Quality (ASHRAE 62-1999), American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE); Thermal Environmental Conditions for Human Occupancy (ASHRAE 55-1992); 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. Meetirg one, some, or all of the listed values does not assure that acceptable indoor air quality will be achieved at all times.

TABLE 1 TARGET GUIDELINES FOR INDOOR AIR QUALITY PARAMETERS EVALUATED

PARAMETER TARGET LEVEL CY gTWI Carbon Dioxide <700 parts per million (ppm) ASHRAE 62 ____________ 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 (pg/m3 ) 24-hour average 40 ug/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 Relat ve Humidity 30 - 60 % ASHRAE 55 Total Volatile Organic Compounds 1 ppm AIHA (TVCC) USEPA == United States Environmental Protection Agency NPAA()S = National Primary Ambient-Air Quality Standard AIHA American Industrial Hygiene Association

CONFIDENTIAL, CITY_21MC100_003462804 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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