Lead-in-dust wipe sampling report, PS 131M, Aug 2002

NYC 9/11 Public Portal Document

Scope of Work

ATC Associates, Inc. (ATC) was retained by New York City Board of Education (NYC- BOE) to collect dust wipes to be analyzed for lead content. Dust wipe samples were collected from areas recommended by the NYC- BOE. These areas are the following:

• First floor lobby • Cafeteria • Auditorium • Two randomly selected classrooms per floor • Hallways-one sample per floor

The purpose of the dust wipe sampling is to determine if dust in the school contains lead. ATC’s representative Mr. Herant Antonyan visited P.S. 131M located at 100 Hester Street, New York, NY on August 22, 2002. Dust wipes to be analyzed for lead content were collected from the aforementioned areas indicated by the New York City Board of Education Enviroiunental Health & Safety Unit and in accordance with HUD protocols.

LEAD-IN-DUST SAMPLING

Lead-in-dust threshold levels The New York City Health Code, part 173.14 and the Federal Departments of Housing and Urban Development (HUD) and Environmental Protection Agency (EPA) have established acceptable lead-in-dust levels for re-occupancy after a lead abatement has occurred (comrhonly referred to as “final clearance” levels). As stated in the Code, final clearance after abatement has taken place is achieved when dust wipe samples indicate lead levels below those listed below;

For Windowsills: 250 pg/tf For Floors; 40 pg/ft"

Although the lead-in-dust samples collected at P.S. 13IM were not collected in response to lead abatement, the same thresholds are used since no other regulations or standards are applicable to this project.

Sampling Methodology ATC provided all laboratory analytical services in support of this limited inspection. ATC is certified by the New York State Department of Health’s Environmental Laboratory Accreditation Program to perform lead and related analyses of environmental samples (Laboratory ID Number: 10879). The laboratory utilizes the United States Environmental Protection Agency analysis method number SW846-7420 and the National Institute of Occupational Safety and Health method number 7082M.

The lead-in-dust samples were obtained by gently wiping a pre-measured surface area with non-alcohol moistened towelettes. ATC’s representative wore disposable gloves; a P.S. I31M <Si«rc A (IOC 1*1 I ( IMC . August 23, 2002

CONFIDENTIAL, CITY_2IMCl00_003422519 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175377