NYC-WTC_000226869

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan January 17, 2002 Indoor Air Quality Assessment Page 4 P. S. 89 ('Manhattan') ATC Protect No. 15-19125-0297

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 not 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, CO2, CO and TVOCs were within applicable standards and guidelines; 2. All indoor measurements of relative humidity were below the ASHRAE-recommended range of 30 to 60 percent for occupant comfort; 3. Nineteen (19) temperature measurements 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). These readings were collected from the 1^1 floor.

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, ATC ASSOCIATES INC. Reviewed by:

,---------------- J

Yiannis Efsta^Mou James R. CoHn, CIH, CSP Project Manager Regional Manager Industrial Hygiene Division

Attachment

CITY_21MC100_000490546 NYC-WTC_000226872