Indoor air quality report, M833 school, June 2002

NYC 9/11 Public Portal Document

A r. Bernard P. Orlan June 17, 2C02 Ir door Air Quality Assessment Page 2 H.S. of Economics and Finance (M833) ATC Project No. 15-19125-0291 Tae 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 quality control activities.

EVALUATION CRITERIA

Currently, 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 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); Thermal Environmental Conditions for Human Occupancy (ASHRAE 55-1992); Industrial Hygienists Guide to Indoor Air Quality Investigations (1993), American Industrial Hygiene Association (AIHA).

lable 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 v'ill be achieved at all times.

TABLE 1 3 ARGET GUIDELINES FOR INDOOR AIR QUALITY PARAMETERS EVALUATED

PARAMETER TARGET LEVEL

Carbon Dioxide (CO2) <700 parts per million (ppm) ASHRAE 62 above background level Carbon Monoxide 9 ppm ASHRAE 62 (adopted from .ICO)__________ USEPA NPAAQS)____________ Respirable 65 micrograms per cubic meter USEPA NPAAQS Particulates (PM25) of air (ug/n?) 24-hour average 40 |ig/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 Organic Compounds (TVOC) 1 ppm AIHA USEPA = United States Environmental Protection Agency NPAAQS = National Primary Ambient-Air Quality Standard AIHA = American Industrial Hygiene Association

CONFIDENTIAL, CITY_21MC100_003462884 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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