NYC-WTC_000175339

NYC 9/11 Public Portal Document

Scope of Work

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

• 5™ Floor Hallway • 4'” Floor Hallway • 3"* Floor Hallway • 2"“ Floor Hallway • r* Floor Hallway • Basement Hallway • r'Floor Lobby • Cafeteria • Auditorium • Two random Classrooms

The purpose of the dust wipe sampling is to determine if dust in the school contains lead. ATC’s representative Mr. Mark Nakhumovich visited Murray Bergtraum H.S. (M520) located at 411 Pearl Street, New York, NY on September 9, 2002. Dust wipes to be analyzed for lead content were collected from the aforementioned areas indicated by the New York City Department of Education Environmental 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 (commonly 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 Window sills: 250 Mg/fV For Floors: 40

Although the lead-in-dust samples collected at Murray Bergtraum H.S. 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 Murray Bergtraum H.S. (MS20) Octc September JO, 2002

CONFIDENTIAL, CITY_2IMCl00_003422301 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175340