NYC-WTC_000209128

NYC 9/11 Public Portal Document

02/15/^0.2 11:13 PAX 212 353 8306 ATC ®005/014

Mr. Bernard P. Orlan February 15, 2002 Indoor Air Quality Assessment Page 4 P, S- 89M ATC Project No. 15-19125-0297

asthmatic people and children. The outdoor respirable particulate concentration averaged 24 pg/m^ (A-M.) and 16 pg/m^ (P.M.).

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

TVOC Concentration.,

TVOCs were not detected (0.0 ppm) anywhere inside or outside the building.

OBSERVATIONS

During this assessment, ATC noted the following;

• The interior of the building appeared clean and free of dust and debris ; • Tire school was partially occupied (I.S. 89) 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 PM2.5, CO2. CO and TVOCs were within applicable guidelines, 2. Five (5) temperature measurements were below and two (2) were above the ASHRAE- recommended range, 3. All indoor 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-S280, extension 261 or 212,

Sincerely, A TCASSOCIA TES INC.

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

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CITY_21MC100_012157980 NYC-WTC_000209131