Indoor air quality report, PS 234M, Jan 2002

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan January 29, 2002 Indoor Air Quality Assessment Page 4 P. S. 234M ATCProiectNml5-19125-0279

* 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 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 CO2, CO and TVOCs were within applicable standards and guidelines; 2. Thirty-six (36) temperature measurements were below the range of 68 to 75° F (at 50 percent relative humidity) recommended by ASHRAE Standard 55-1992; 3. Twelve (12) indoor measurements of relative humidity were below the ASHRAE recommended range of 30 to 60 percent for occupant comfort. 4. Three (3) measurements of respirable particulates were higher than the NPAAQS of 65 pg/m3 24-hour average concentration of particulate matter 2.5 micrometers or less in aerodynamic diameter

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 TCASSOCIA TES INC. Reviewed by: / i.

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

Attachment

CONFIDENTIAL, CITY_21MC100_0 03444721 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177861