NYC-WTC_000200222

NYC 9/11 Public Portal Document

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AMBIENT AIR AND DUST SAMPLING PROTOCOL for H.S. of Economics and Rnance Page 3 of 8

Since, there are no regulatory standards for indoor air quality in non-industrial buildings, such as offices and schools at this time, for the real-time data collected, the commonly accepted guidelines cited in the following publications and table below shall be utilized:

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).

TARGET GUIDELINES FOR INDOOR AIR QUALITY PARAMETERS EVALUATED

PARAMETER TARGET LEVEL ____________________ __________________________ Temperature (T) Summer 73-79’F at 50% RH ASHRAE 55 Winter; 68-75’F at 50% RH Relative Humidity (RH) 30-60% ASHRAE 55 Carbon Dioxide (COz) <700 parts per million (ppm) ASHRAE 62 above background level Carbon Monoxide 9 ppm USEPA NPAAQS (as cited in ICO)___________ ASHRAE 62) Total Volatile Organic 1 ppm AIHA Compounds (TVOC) Respirable Particulates 65 micrograms per cubic USEPA NPAAQS (PMzs) meter of air (pg/m^) 24-hour average 40 pg/m^ 24-hour average USEPA - Recommendation for sensitive individuals such as asthmatic people and children USEPA = United States Environmental Protection Agency NPAAQS = National Primary Ambient-Air Quality Standard AIHA = American Industrial Hygiene Association ASHRAE = American Society of Heating. Refrigerating, and Air-Conditioning Engineers

Results from samples collected each day shall be reported verbally, no later than 11 am the next day, to BOE, UFT, School Principal and the PA consultant. A written report shall be delivered or faxed by the end of the day.

In the event that real-time measurements of Temperature, Relative Humidity, and/or COz exceed the cited Target Guidelines, the following actions are to be taken:

1. Building engineering controls shall be adjusted and/or implemented to improve conditions.

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