NYC-WTC_000188377

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan May 20, 2002 Indoor Air Quality Assessment Page 4 H.S. for Leadership & Public Service (M894) ATC Project No. 15-19125-0290 * The measurements made during this assessment were instantaneous readings, the NPAAQS is a 24-hour average. TVOC Concentration

The TVOCs concentrations were 0 ppm inside the building. These concentrations were below the AIHA guideline for odor control of 1 ppm. The outdoor TVOC concentration was also 0 ppm.

OBSERVATIONS

During this assessment, ATC noted the following; • The interior of the building appeared cleari and free of dust and debris; • 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. One (1) of the indoor measurements for temperature was within and one hundred twenty­ seven (127) were above the range of 73 to 79*F (at 50 percent relative humidity) recommended by ASHRAE Standard 55-1992 during the summer season. 3. All of the indoor measurements for relative humidity were within the ASHRAE- recommended range of 30 to 60 percent for occupant comfort. 4. All of the indoor measurements for PM2,5 were below the NPAAQS of 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/m^ for sensitive individuals such as asthmatic people and children.

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, ext. 211 or 212.

Sincerely, .4 TCASSOCIA TES INC. Reviewed by:

James R. Cohn, CIH, CSP Senior ect Manager Regional Manager Industrial Hygiene Division

Attachment

CITY_21MC100_003079462

NYC-WTC_000188380