NYC-WTC_000196755

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 • F'Floor Hallway • F‘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 P.S. 42M located at 71 Hester Street, New York, NY on September 4, 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-D UST 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: o

For Window sills: 250 pg/fe For Floors: 40 pg/ft^

Although the lead-in-dust samples collected at P.S. 42M 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 PS 42M <Satc IKC September 5, 2002

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NYC-WTC_000196756