NYC-WTC_000234651

NYC 9/11 Public Portal Document

AMBIENT AIR AND DUST SAMPLING PROTOCOL for PS/IS89M. Page 3 of 8

Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE); Thermal Environmental Conditions for Human Occupancy (ASHRAE 55-1992); Industrial Hygienists Guide to Indoor Air Quality Investigations (1993), American Industrial Hygiene Association (AIHA).

TARGET GUIDELINES FOR INDOOR AIR QUALITY PARAMETERS EVALUATED

PARAMETER TARGET LEVEL AGENCY OR ORGANIZATION Temperature (T) Summer: 73-79°F at 50% RH ASHRAE 55 Winter: 68-75°F at 50% RH Relative Humidity (RH) 30 - 60 % ASHRAE 55 Carbon Dioxide (CO2) <700 parts per million (ppm) ASH RAE 62 above background level Carbon Monoxide 9 ppm USEPA NPAAQS (as cited in ICO)____________ ASHRAE 62) _________ Total Volatile Organic 1 ppm AIHA Compounds (TVOC) Respirable Particulates 65 micrograms per cubic USEPA NPAAQS (PM2.5) meter of air (ng/m®) USEPA = United States Environmental Protection Agency NPAAQS = National Primary Ambient-Air Quality Standard AIHA = American Industrial Hygiene Association ASHRAE = American Society of Heating, Refrigerating, and Air-Conditioning Engineers

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.

In the event that real-time measurements of Temperature, Relative Humidity, and/or CO2 exceed the cited Target Guidelines, the following actions are to be taken:

1. Building engineering controls shall be adjusted and/or implemented to improve conditions. In the event, that real-time measurements of respirable particulates exceed the cited Target Guidelines, BOE will immediately notify the UFT, the school principal, the school custodian and the PA consultant. The said parties will assess the situation and implement the appropriate response action(s).

In the event, that CO inside the school measured above the cited Target Guidelines (9ppm), BOE will immediately notify the UFT, the school principal, the school custodian and the PA consultant. The said parties will assess the situation and implement the appropriate response action (s).

In the event that real-time measurement{s) of CO inside the school is/are greater than 5ppm and less than 9ppm, BOE will identify the source and assess the situation.

CITY_21MC100_009363865

NYC-WTC_000234653