NYC-WTC_000204593

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 specified in H.A. BADER Consultants, Inc. letter to Stuyvesant HS parents dated October 10, 2001. These areas are the following:

• U and 2'"' floors entrance lobby • Classrooms with unit ventilators on the North, East and South side of the building • Two hallway areas • U* floor swimming pool area • 3''* floor gymnasium area • 5*'’ floor cafeteria area • Auditorium area

The purposed of the dust wipe sampling is to detennine if dust in the school contains lead. aTC will be repeating this sampling every Wednesday as per the recommendation of H.A. BADER Consultants, Inc. and after the approval of NYC-BOE. This is the eighth consecutive time that dust samples were collected from Stuyvesant HS to be analyzed for lead content.

ATC’& representative Mr. Herant Antonyan visited Stuyvesant HS (M477) located at 345 Chamber Street, New York, NY on December 5“', 2001, Dust wipes to be analyzed for lead content were collected from the aforementioned areas indicated in H.A. BADER Consultants, Inc. letter to Stuyvesant HS parents and as specified by the New York City Board 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 (ERA) 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 Windowsills: 250 ug jr For Floors: 40 pg/ft2

Although the lead-in-dust samples collected at Stuyvesant HS (M477) were not collected in response to lead abatement, the same thresholds are used since no other regulations or standards are applicable to this project.

Stuwesanl HS ('M477) December 6, 2001

CITY_21MC100_003073065

NYC-WTC_000204594