NYC-WTC_000208021

NYC 9/11 Public Portal Document

01/23/2002 15:11 FAX 212 353 8306 ATC @016

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 throughout the H.S. of Economics & Finance (M833), located at 100 Trinity Place, New York, NY. The purposed of tide dust wipe sampling is to determine if dust in the school contains lead.

ATC’s representative Ms, Mariana Medinets visited the H.S. of Economics & Finance (M833) on January Ij*, 2002. Dust wipes to be analyzed for lead content wore collected from areas throughout the school building 'and as specified by tlie New York City Board of Education Environmental Hcaltli & Safety Unit and in accordsmcc with HUD protocols.

LEAD-JN-DUST SAMPLING

Lead-in-dust threshold levels ’Hie 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 wells: 400 For Windowsills: 250 |ig/tf For Floors: 40 ng/tf

Although the lead-in-dust samples collected at H.S. of Economics & Finance (M833) were not collected in response to lead abatement, the same tliresholds 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 Laboratorj^ Accreditation Program to perform lead and related analyses of environmental sample.s (Laboratory LD Number: 10879). The laboratory utilizes the United States Environmental Protection Agency analysis metliod number SW846-7420 and the National Institute of Occupational Safety and Health method number 7082M.

H,S. ofEconomics & Einance (M8S3) January 16, 2003

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NYC-WTC_000208022