Indoor Air Quality Report, March 12, 2002, NYC School

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan March 13, 2002 Indoor Air Quality Assessment Page 4 H.S. of Economics and Finance fM833 ) ATCPrqiectNqMM9125-0291 of the twelve (12) instantaneous outdoor readings were above the USEPA recommended conce^ntration of 40 pg/m^ for sensitive individuals / children. * The measurements made during this assessment were instantaneous readings, the NPAAQS is a 24-hour average.

TVOC Concentration

TVOCs were not detected anywhere inside the building (0.0 ppm). The outdoor TVO(? concentration was also 0.0 ppm.

OBSERVATIONS

During this assessment, ATC noted the following: • The interior of the building appeared clean and free of dust and debris; • The 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 CO and TVOCs were below applicable standards and guidelines. 2. Concentrations of relative humidity were within the applicable standards and guidelines. 3. Thirty-four (34) of the indoor measurements for temperature were below and forty-nine (49) were within the range of 68 to 75°F (at 50 percent relative humidity) recommended by ASHRAE Standard 55-1992 during the heating season (wintertime conditions). 4. Seven (7) of the indoor measurements for CO2 were above the ASHRAE Standard 62-1999 recommended maximum concentration of <700 ppm above the background level. The highest reading (1482 ppm) was measured in Room # 705 approximately at 4:29 PM with 21 occupants. Levels above the recommended maximum do not indicate a health risk. Carbon dioxide measurements are used as an indicator of available outdoor air. The primary source of CO2 indoors is occupant respiration. 5. All of the indoor measurements for PM2.5 were below the NPAAQS of 65 pg/m^ 24-hour average concentration of particulate matter 2.5 micrometers or less in aerodynamic diameter. Two (2) of the eight-eight (88) instantaneous indoor readings were above the USEPA recommended concentration of 40 pg/m^ for sensitive individuals / children.

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 336 or 212.

Sincerely, .1 T^SSOCIA TES INC. Reviewed by:

Arnel Javal (/ James R. Cohn, CIH, CSP Senior Project Manager Regional Manager, Industrial Hygiene Division

Attachment

CONFIDENTIAL, CITY_21MC100_003462000 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179979