NYC-WTC_000189753

NYC 9/11 Public Portal Document

Mr Bernard P Orlan February 28, 2002 Indoor Air Quality Assessment Page 4 H S for Leadership & Pub Service (M894) ATCProiectNo 15-19125-0290

TVOC Concentration

The TVOCs concentrations was 0 ppm inside the building These concentrations were below the AIHA guideline for odor control of 1 ppm The outdoor TVOC concentration was 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 CO2, CO and TVOCs, were within applicable standards and guidelines 2. Ten temperature measurements were below the range of 68 to 75°F (at 50 percent relative humidity recommended by ASHRAE Standard 55-1992 during the heating season (wintertime conditions) 3. Twenty-four (24) of the relative humidity measurements were below the ASHRAE recommended range of 30 to 60 percent for occupant comfort 4. None of the indoor respirable particulate measurements were above the EPA recommended guideline for children and sensitive individuals of 40pg/m3 One of the outdoor readings were above the NPAAQS of 65 pg/m3

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 261 or 212

Sincerely, A TC ASSOCIA TES INC. Reviewed by

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

Attachment

CITY_21MC1OO_OO67978O8

NYC-WTC_000189756