NYC-WTC_000200230

NYC 9/11 Public Portal Document

AMBIENT AIR AND DUST SAMPLING PROTOCOL for PS/IS89M. Page 2 of 9

• Inside Playground south side - 2 samples (one sample from 8am-12pm & one from 12pm-4pm) • Fifth floor roof - 2 samples (one sample from 8am-12pm & one from 12pm-4pm) The duration of all ambient air sample shall be approximately 4 hours. The total air volume sampled at each location shall be approximately 1800 liters.

All ambient air samples collected shall be analyzed via Transmission Electron Microscopy (TEM) in accordance with the methodology of the AHERA Final Rule.

Results from samples collected each day shall be reported verbally, no later than Sam the next day, to BOE, UFT, School Principal and the PA consultant. A written report shall be delivered or faxed by the end of the day. Unsatisfactory results (>70 s/mm") shall be reported 'immediatsly.

In the event that any one sample result exceed 70 s/mm^ ATC shall immediately notify BOE representative Mr. Mohamed Hemida, the UFT and the PA consultant. BOE shall notify the school principal, the school custodian and the plant manager. The said parties will assess the situation and implement the appropriate response action(s) immediately.

INDOOR AIR QUALITY

To address lAQ concerns, each day from Monday through Friday, the following shall be performed;

• A visual inspection to assess conditions present in the school at the time of the site visit

• Collect approximately 80 real-time environmental measurements of temperature (T)

• Collect approximately 80 real-time environmental measurements of relative humidity (RH)

• Collect approximately 80 real-time environmental measurements of carbon dioxide (CO;)

• Collect approximately 80 real-time environmental measurements of carbon monoxide (CO)

• Collect approximately 80 real-time environmental measurements of total volatile organic compounds (TVOCs)

• Collect approximately 80 real-time environmental measurements of respirable particulates (PM2.5).

EVALUATION CRITERIA:

Since, there are no regulatory standards for indoor air qualify in non-industrial buildings, such as offices and schools at this time, for the real-time data collected, the commonly accepted ) guidelines cited in the following publications and table below shall be utilized:

CITy_21MC100_003267271

NYC-WTC_000200231