NYC-WTC_000189316

NYC 9/11 Public Portal Document

104 East 25th St 10th Floor New York New York 10010 WWW ate enviro com 212 353 8280 Fax 212 353 8306 ASSOCIATES INC

March 22 2002

Mr Bernard? 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 High School for Leadership & Public Service (M894) 90 Trinity Place New York, New York 10006 ATC Project No 15-19125-0290

Dear Mr Orlan

ATC Associates Inc (ATC) is pleased to provide this report of indoor air quality (lAQ) measurements collected on March 21 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 an quality is being maintained

SCOPE OF WORK

ATC conducted this evaluation to assess the basic parameters of temperature relative humidity carbon dioxide (CO2) and carbon monoxide (CO)

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

Manana Medinets Environmental Technician of ATC s New York City office conducted the assessment ATC s findings 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 COj and CO with a Q Trak® Model 8551 manufactured by TSI Inc

ATC measured concentrations of respirable particulates (PM2 5) 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 \ ariability variations in indoor air quality parameters and sampling and analytical accuracy

CITY_21MC100_003085549

NYC-WTC_000189316