NYC-WTC_000199886

NYC 9/11 Public Portal Document

Three samples of debris from beneath the rubber mats in the playground were all found to contain between a trace and 0.25 percent asbestos. Based on these results, the SCA contracted for the removal and cleaning of the rubber mats and the playground surfaces.

There were a total of 13 soil samples collected from planters for analysis of asbestos. Nine surface soil samples were found to contain either no detectable asbestos or trace levels of asbestos. Four samples collected from a depth of six inches below the ground surface were all found to contain no detectable asbestos. Based on these results, the SCA Contracted for the removal and replacement of the surficial soils in all the planters around the school.

School-Vv ide Lead Dust Sampling (November 29,2001)

To evaluate the adequacy of cleaning, an extensive dust sampling program was implemented for analysis of lead. On November 29, forty dust samples were collected from throughout the school for lead analysis. Of the forty samples, 37 contained no detectable lead. The remaining three samples contained between 4.8 and 17.9 ug/ft^, which are all less than the most-stringent acceptable level established for lead abatement projects, 40 ug/ft^.

Follow-Up Air Monitoring for Asbestos (November 29-December 2, 2001)

Eighteen air samples were collected on each day during the period November 29 to December 2. Samples were taken from various locations throughout the school. No asbestos structures were detected in any of the samples collected on those four days.

Initial Indoor Air Quality Assessment (November 29-December 2, 2001)

Independent of the sampling requested by ENVIRON on behalf of the PS 234 Parent Teacher Association, the Board of Education retained ATC Associates Inc. to perform air testing during the period November 29 through December 2,2001. This testing included the collection of four air samples (three inside the school and one outside the school) per day for analysis of eleven metals and a number of hydrocarbon compounds, including benzene and other volatile organic compounds, as well as monitoring for other air quality parameters, such as carbon dioxide, carbon monoxide, total volatile organic compounds, and particulates (PM2.5). Sampling locations varied on each of the four days and included the following locations:

• November 29: cafeteria, library. Room 305, outside on the east side of PS 234.

• November 30: Room 111, Room 229, Room 329, outside on the north side of PS 234.

• December 1: Room 122, Room 222, Room 322, outside on the roof by the HVAC intake.

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CITY_21MC100_008972438

NYC-WTC_000199887