Ambient air sampling report, 40 Rector Street, Sep-Oct 2001

NYC 9/11 Public Portal Document

n 40 Rector Holdings, LLC ATC Project No.: 19855-0001 C/0 Tannenbaum Helpern Syracuse & Hirschtritt LLP October 25, 2001 Ambient Air Sampling - 40 Rector Street Page 4 Of 7

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TABLE 3 -TARGET GUIDELINES FOR INDOOR AIR QUALITY PARAMETERS EVALUATED I..J PARAMETER TARGET LEVEL AGENCY OR ORGANIZATION Carbon Dioxide <700 parts per million ASHRAE 62 (CO,) (ppm) above background level Carbon Monoxide 9 ppm USEPA NPAAQS (as cited ICO)_________ in ASHRAE 62)________ Respirable 50 micrograms per cubic USEPA NPAAQS (as cited lJ Particles (PM^) meter of air (pg/m^) in ASHRAE 62) Temperature Summer: 73-79°F at 50% ASHRAE 55 RH LJ Winter: 68-75°F at 50% RH Relative Humidity 30 - 60 % ASHRAE 55 I.J

Total Volatile n Organic 1 ppm Al HA Compounds (TVOC) USEPA = United States Environmental Protection Agency NPAAQS = National Primary Ambient-Air Quality Standard AIHA = American Industrial Hygiene Association

REAL-TIME MONITORING ATC collected readings of the six listed parameters within representative areas inside the building and one set of readings outside of and adjacent to the building. The indoor air quality field reports are included in Attachment 1 at the end of this report. These areas were unoccupied at the time of this assessment. n All parameters measured during the lAQ assessment were within recommended guideline ranges, however, an odor of smoke was detected in several locations. This odor infiltrated the building from fires at the nearby World Trade Center site. This odor does not constitute a health hazard although building occupants may consider the odor unpleasant and annoying. Sensitive individuals, such as asthmatics, may find the odor n irritating. As a potential remedy to the odor, ATC provided a recommendation on October 2, 2001 for building operation modifications to minimize the odor entrainment into the building. The recommendation suggested that the building consider installing charcoal-impregnated filters on the HVAC system intakes to reduce odor entrainment;

ATC Associates Inc. © 2001

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