Indoor air quality report for PS 234M, Feb 2002

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan February 4, 2002 Indoor Air Quality Assessment Page 4 P. S. 234M ATC Proiect No. 15-19125-0297

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

TVOCConcentration

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 by staff at the time of the assessment; • There was a lot of activity (e.g. moving) in the building; • No smoke odor was detected in the building.

FINDINGS

Based on the real-time measurements, the following findings are presented:

1. Concentrations of CO2, CO and TVOCs were within applicable standards and guidelines; 2. All measurements of PM2.5 were below the NPAAQS of 65 ug/m^; Thirteen (13) measurements were above the EPA recommended level of 40 ug/m^; 3. All indoor measurements of relative humidity were within the ASHRAE-recommended range of30 to 60 percent for occupant comfort; 4. All but two (2) temperature measurements were below the range of 68 to 75® F (at 50 percent relative humidity) recommended by ASHRAE Standard 55-1992 during the heating season (wintertime conditions).

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

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

Attachment

CITY_21MC100_003101614

NYC-WTC_000182871