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NYC-WTC_000202147
Label derived from the City's folder field. The City does not supply document titles.NYC-WTC_000202147–000202148Page image
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NYC 9/11 Public Portal Document
Mr. Bernard P. Orlan September 30, 2002 Respirable Particulate Sampling Page 2 P.S.S9M ATC Project No. 15-19125-0297
The table lists target guideline for the parameter that ATC evaluated during this investigation. Meeting the listed value does not assure that acceptable indoor air quality will be achieved at all times.
TARGET GUIDELINE FOR INDOOR AIR QUALITY PARAMETER EVALUATED ■ TARGI )R ■■■■■■IlIlllL, I _____________ \! 65 micrograms per cubic Respirable meter of air (pig/n?) 24-hour USEPA NPAAQS Particulates (PM2.5) average_______ ~ 40 micrograms per cubic USEPA recommendation for meter of air (qg/mQ 24-hour children and sensitive average individuals USEPA = United States Environmental Protection Agency NPAAQS = National Primary Ambient-Air Quality Standard
RESULTS
ATC collected one (1) 24-hour gravimetric sample in the U‘ Floor Hallway by the cafeteria. The analytical laboratory report is provided in the attachment.
The 24-hour average concentration of PMj 5 was 9.03 ug/m’, which is below both the EPA NPAAQS for PM , of 65 ug 'nT and the EPA recommended level of 40 ug/m\
It is our pleasure to provide these indoor air consultative services to the New York City Department of Education. If you have any questions about this report, please call (212) 353-8280, extension 212.
Sincerely, Arc ASSOCIATES INC.
James R. Cohn, CIH, CSP Regional Manager, Industrial Hygiene Division
Attachment
CITY_21MC100_005390600
NYC-WTC_000202148
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NYC-WTC_000202148Source: NYC Law Department, mirrored locally
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