NYC-WTC_000215155

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan February 18, 2002 Indoor Air Quality Assessment Page 4 H.S. for Leadership & Pub. Service (M894) ATC Project No. 15-19125-0290

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. Concentrations of respirable particulates, CO , CO2 and TVOCs, were within applicable standards and guidelines. ■2. Six (6) temperature measurements were below and fifteen (15) were above the range of 68 to 75°F (at 50 percent relative humidity recommended by ASHRAE Standard 55-1992 during the heating season (wintertime conditions). 3. One hundred and thirty-two (132) of the relative humidity measurements were below the ASHRAE recommended range of 30 to 60 percent for occupant comfort. The other two (2) measurements were within the recommended range.

.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 261 or 212.

Sincerely, A TC ASSOCIA TES INC. Reviewed by:

Yiannis Efstathiou James R. Cohn, CIH, CSP Project Manager Regional Manager Industrial Hygiene Division

Attachment

CITY_21MC100_002871799

NYC-WTC_000215158