Indoor Air Quality Report, May 10, 2002, NYC School

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan May 13, 2002 Indoc r Air Quality Assessment Page 2 H.S. of Economics and Finance (M8331 ATC Project No. 15-19125-0291 by th; 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 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 (ASHR.4E 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. Meeting one, some, or all of the listed values does not assure that acceptable indoor air quality will b3 achieved at all times.

TABLE 1 TARtiET GUIDELINES FOR INDOOR AIR QUALITY PARAMETERS EVALUATED

PARAMETER TARGET LEVEL AGENCY OR ORGANIZATION Carbon Dioxide (COJ <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 (PM25) of air (pg/nV) 24-hour average 40 pg/m’ 24-hour average USEPA -- Recommendation for children / sensitive individuals Temaerature 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

Real -Time Environmental Measurements

ATC collected one hundred (100) sets of real-time environmental measurements consisting of eighty-eight (88) inside the school building and twelve (12) outdoors. Field data sheets are found

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