Indoor air quality report, M477 School, March 2002

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan March 7, 2002 Indoor Air Quality Measurements Page 4 Stuyvesant High School (M477) ATC Project No. 15-19125-0246 In addition to higher efficiency rating filters on their HVAC units, portable High Efficiency Particulate Air (HEPA) purifiers were placed in Rooms 327, 333, 638 and 740. The PM2.5 concentration range for these rooms was 6-13 pg/m^ with an average of approximately 9 pg/m3.

* The measurements made during this assessment were instantaneous readings, the NPAAQS is a 24-hour average.

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. Measurements of temperature and concentrations of respirable particulates, CO ,CO2, and TVOCs, were within applicable standards and guidelines. 2. All measurements of relative humidity were below the ASHRAE recommended range of 30 to 60 percent for occupant comfort.

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 21 lor 212.

Sincerely, Reviewed by: TC ASSOCL4 T£& INC.

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

Attachment

CITY_21MC100_003098731

NYC-WTC_000182481