NYC-WTC_000187677

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan March 19, 2002 Indoor Air Quality Assessment Page 4 P. S. 150M ATCProi^h No. 15-19125-0289

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

Tl'OC Concenirations

TVOCs were not detected anywhere inside the building (0.0 ppm). Tlie outdoor TVOC concentration was also 0.0 ppm.

OBSERVATIONS

During this assessment, .Y'fC noted the following: • There was construction work going on in the plaza; • The school 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. Concentrations of CD, CO2 and TVOCs were within applicable standards and guidelines. 2. None of the indoor or outdoor PM2.5 measurements were above the NPAAQS of 65 pg/m-^ or above the USEPA recommended PM2 5 concentration of 40 pg/m-’ for sensitive individuals and chilcren. 5. Four (4) of the 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 (wintert:ime conditions). 4. Nine (9) 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) 3.S3-S2S0, extension 21101212.

Sincerely, Reviewed by: . (rc ASSOCIA TES INC.

/ '--Ahannis Efstathiou James R. Cohn, CIH, CSP Senior Project Manager Regional Manager Industrial Hygiene Division Attachment

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NYC-WTC_000187680