NYC-WTC_000204528

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan March 20, 2002 Indoor Air Quality Measurements Page 4 Stuyvesant High School (M477j 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 7-16 pg/m^ with an average of approximately 13 ug'm-.

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

TVOCConceniraiion

TVOCs inside the building wereO.O ppm for all readings. The outdoor TVOC concentrations were also 0.0 ppm.

OBSERVATIO?^

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. Twenty-five (25) 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 211 or 212.

Sincerely, A TC ASSOCIA TES INC. Reviewed by:

Yiannis Efstathiou James R. Cohn, CIITCSP Senior Project Manager Regional Manager Industrial Hygiene Division

Attachment

CITY_21MC100_003061513 NYC-WTC_000204531