NYC-WTC_000214386

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan May 29, 2002 Indoor Air Quality Assessment Page 4 P. S.TSOM ATC Project No. 15-19125-0289 * The measurements made during this assessment were instantaneous readings, the NPAAQS is a 24-hour average.

Type Concentrations

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: • 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;

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

1. Concentrations of indoor respirable particulates, CO2, CO, and TVOCs were within applicable standards and guidelines. 2. Five (5) of the indoor measurements were above and none of the measurements were below the range of 73 to 79°F (at 50 percent relative humidity) as recommended by the ASHRAE Standard 55-1992 during the mechanical cooling season (summertime conditions). 3. All of the measurements were within 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, Reviewed /I TC ASSOCIA TES INC.

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

CITY_21MC1OO_OO287O649

NYC-WTC_000214389