NYC-WTC_000212721

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan June 4,2002 Indoor Air Quality Assessment Page 4 P. S. 234M ATC Project No. 15-19125-0279

ri'oc TVOCs were not detected anywhere inside the building (0.0 ppm). The outdoor TVO( concentration was also 0.0 ppm.

OBSERVATIONS

During this assessment, ATC noted the following: • The building was occupied at the time of the assessment; • No smoke odor was detected in the building.

FINDINGS

Based on the real-time measurements, the following findings are presented:

1. Concentrations of CO2, CO, and TVOCs were below applicable standards and guidelines. 2. Fifteen (15) of the indoor measurements for temperature were below the range of 7.? to 79°F (at 50 percent relative humidity) as recommended by ASHRAF Standard 55-1992 during the summer season. 3. Thirty (30) of the indoor measurements for relative humidity were below the ASHRAE- recomrnended range of 30 to 60 percent for occupant comfort. 4. None of the measurements collected indoors for respirable particulate concentrations were above the NPAAQS 65 pg/m^ 24-hour average concentration of particulate matter 2.5 micrometers or less in aerodynamic diameter and the USEPA recommended concentration of 40 pg/iTi^ for sensitive individuals and children. 5. One (1) CO2 measurement was above the range recommended by ASHRAE 62-1999.

It is our pleasure to provide these indoor air quality services to the New York City Board of Education. If you have any questions about this report, please call (212) 353-8280, extension 211 or 212.

Sincerely, ATC ASSOCIATES INC.

■"7 Zr <• e / Yiannis Efstathio^ Senior Project Manager

Attachment

CITY_21MC100_002852088

NYC-WTC_0002 12724