NYC-WTC_000223596

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan June 26, 2002 Indoor Air Quality Assessment Page 4 H.S. of Economics and Finance (M833) ATC Project No. 15-19125-0291

TVOC Concentration

TVOCs were not detected anywhere inside the building (0.0 ppm). The outdoor TVOC concentration was also 0.0 ppm.

OBSERVATIONS

During this assessment, ATC noted the following: • The interior of the building appeared clean 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. Indoor concentrations of CO, CO2 and TVOCs were within applicable standards and guidelines. 2. Fifty (50) of the indoor measurements for temperature were above the range of 73 °F 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 ASHRAE recommended range of 30 to 60 percent for occupant comfort. 4. Nine of the indoor measurements for respirable particulates were above the NPAAQS of 65 pg/m3 24-hour average concentration of particulate matter 2.5 micrometers or less in aerodynamic diameter. Five (5) of the indoor measurements were above the USEPA recommended concentration of 40 pg/m^ for sensitive individuals 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, A TC ASSO CIA TES INC.

I TYiannis Efstathiou Senior Project Manager

Attachment

CITY_21MC100_002891928

NYC-WTC_000223599