NYC-WTC_000223184

NYC 9/11 Public Portal Document

600 West Cummings Park, Suite 6b00 Woburn, MassachuseRs 01391-6350 WWW atc-envi!O com 781.932,9400 Fax 781 932 6211 ASSOCIATES INC.

June 26,2002

Mr. Bernard P. Orlan Director, Environmental Health & Safety New York City Board of Education 28-11 Queens Plaza North Long Island City, NY 11101 -4008

Re: Indoor Air Quality Assessment Stuyvesant High School (M477) 345 Chambers Street New York, New York 10007 ATC Project No. 15-19125-0246

Dear Mr. Orlan;

ATC Associates Inc. (ATC) is pleased to provide this report of indoor air quality (lAQ) measurements collected on June 25, 2002, at the referenced school. The New York City Board of Education (BOE) requested these measurements as part of a program to determine if acceptable indoor air quality is being maintained.

SCOPE OF WORK

ATC conducted this evaluation to assess the basic parameters of temperature, relative humidity, carbon dioxide (COj) and carbon monoxide (CO).

Total volatile organic compounds (TVOCs) and respirable particulates were also measured.

Herant Antonyan, Environmental Technician, of ATC’s New York City office, conducted the assessment. ATC’s findings and conclusions are based on a visual inspection, real-time environmental measurements and conditions present in the school at the time of the assessment.

ATC measured temperature, relative humidity, CO2 and CO with a Q-Trak® Model 8551, manufactured by TSI, Inc.

ATC measured concentrations of respirable particulates (PM25) with a Dust-Trak® Aerosol Monitor Model 8520, manufactured by TSI, Inc.

ATC measured concentrations of TVOCs using a RAE Systems, Inc. MiniRAE® photoionization detector (PID).

The assessment was performed consistent with generally accepted indoor air quality assessment practices. As with all such assessments, there were inherent limitations created by constraints of time, operational and work practice variability, variations in indoor air quality parameters and sampling and analytical accuracy.

The results of the sampling represent conditions found on the dates of the survey and may not represent conditions found at other times. The information presented in this report should be used

CITY_21MC100_002889569

NYC-WTC_000223184