NYC-WTC_000207834

NYC 9/11 Public Portal Document

08/30/2002 08:19 FAI 212 353 8300 ATC ®021

600 West Cummings Park, Suite $500 Woourn, Mass9(!husetta 01801-6350 WWW. ate- enviro. com 781.332.9400 Fax 781.932.6211 associates INC.

September 30,2002

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

Re: Indoor Air Quality Assessment P.S. 65Q 103-22 99*11 Street Ozone Park, New York ATC Project No. 13-19125-0334

Dear Mr. Orlan:

ATC Associates Inc. (ATC) is pleased to provide this report of indoor air quality (lAQ) measurements collected on September 27 2002, at the referenced school. The New York City Department of Education (DOE) requested these measurements as part of a program to verify that 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 (CO-) and carbon monoxide (CO) with a Q-Trak® Model 8551, manufactuTad by TSI, Inc.

ATC’s findings are based on a visual inspection, real-time environmental tneasuremeniB and conditions present in the school at the time of the assessment.

Mariana Mcdincts, Environmental Technician of ATC’s New York City office, conducted the assessment 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 represent conditions found on the date of the survey.

CITy_21MC100_004035962

NYC-WTC_000207834