NYC-WTC_000209133

NYC 9/11 Public Portal Document

02/12/2002 12:48 FAX 212 353 8308 ATC @005/015

Mr, Bernard P. Orlan February 12, 2002 Indoor Air Quality Assessment Page 4 F. S. 89M ___________ ATC Project No. 15-19125-0297

asthmatic people and children. The outdoor respirable particulate concentration averaged 6 pg/m^ (A.M.) and 19 pg/m^ (P.M.).

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

T^OC Conceniration

TVOCs were not detected (0,0 ppm) anywhere inside or outside the building.

OBSERVATIONS

During Ulis assessment, ATC noted the following:

• The interior of the building appeared clean and &ee of dust and debris; • The 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. All measurements of temperature, except one, were within the ASHRAE-recommended range. 3. Only three (3) indoor measurements of relative humidity, collected in the morning, were within the ASHRAE recommended range of 30 to 60 percent for occupant comfort. All other measurements were below the recommended range.

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 H 261 or 212.

Sincerely, A TC ASSOCIA TES INC.

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

Attachment

CITY_21MC1OO_O09253169 NYC-WTC_OOO2O9136