NYC-WTC_000202519

NYC 9/11 Public Portal Document

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104 East 25th St., 10th Fl New York, New York 10010 www.atc-enviro.com 212.353.8280 Fax 212.353.8306 ASSOCIATES INC.

August 30, 2002

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

Re: Air Sampling for Lead Intermediate School 306 X 40 West Tremont Avenue Bronx, New York ATC Project No. 15-19125-0246

Dear Mr. Orlan:

ATC Associates, Inc. (ATC) is pleased to provide this report of the results of air samples for lead collected on August 27, 2002, at the referenced school. The New York City Board of Education (BOE) requested this sampling to determine ambient air lead concentrations inside and outside the school.

Scope of Work

ATC collected fourteen (14) samples for lead-in-air at specified locations. Samples were collected for eight (8) hours using 37 mm mixed cellulose ester filters connected to electric sampling pumps at a flow rate of 2 liters per minute. Pumps were calibrated before and after each sampling period. Twelve (12) air samples were collected inside and two (2) air samples were collected outside the building. Two (2) blanks sample were also submitted. The samples were analyzed by ATC’s American Industrial Hygiene Association-accredited laboratory in New York City. Analysis was performed by NIOSFI Method 7082. A copy of the laboratory report is attached.

The sampling locations were as follows; • D'Floor Lobby (Atrium); • Auditorium; • Gymnasium; • Library; • Corridor B-2"‘‘Floor HVAC #7; • Corridor C - 3rd Floor HVAC #12; • Corridor A - 4th Floor HVAC #11; • Boy’s Locker Room; • Girl’s Locker Room; • Classrooms 561, 411, 322; • Roof Intake - outside the building; • Exterior next to the Mam Entrance.

NYC-WTC_000202519