NYC-WTC_000187665

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan March 26, 2002 Indoor Air Quality Assessment Page 4 _________________ ATC Project No. 15-I9125-(1289

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

ri''OC Concentrations

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

OBSERVATIONS

During this assessment, AT(/ 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:

I. Concentrations of CO, COp and TVOCs were within applicable standards and guidelines; 2 . None of'the indoor or outdoor PM2 5 measurements were above the NP.VAQS of 65 pg/m^ or above the US.EPA recommended PM2.5 concenhation of 40 pg/m^ for sensitive individuals and children. 3. All of the temperature measurements were within the range of 68 to 750 f Qt 50 percent relative humidity) recommended by ASHRAE Standard 55-1992 during the heating season (wintertime conditions). 4. 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 211 or 212.

Sincerely, Review^ed by: .4 TC ASSOCIA TES INC.

y ’ihannis Efstamiou James R. Cohn, CIH, CSP Senior Project Manager Regional Manager Industrial Hygiene Division Attachment

CITY_21MC100_002954210

NYC-WTC_000187668