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EPA air monitoring data summary, WTC area, Oct 2001

Machine-extracted title · confidence 90%

Summary of fine particulate matter (PM 2.5) air monitoring data measured at a New York site following the September 11 attacks.

NYC-WTC_000178326–000178327
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NYC 9/11 Public Portal Document

In the News - Headlines Page 2 of 3

10/05/2001 6 AM 45.39 10/05/2001 Tam 39?74 10/05/2001 4 AM 33.73 10/05/2001 SAM 32.24 10/05/2001 7am 3572 10/05/2001 1 AM 28.12 10/05/2001 12 AM 29.29

10/04/2001 Daily Average: 38.61

10/04/2001 11 PM 31.75 10/04/2001 10 PM 3076 10/04/2001 9 PM 25.94 10/04/2001 8 PM 3W 10/04/2001 tTm 3T48 10/04/2001 6 PM “TTF 10/04/2001 5 PM 3749 10/04/2001 TPM 3178 10/04/2001 3 PM 3647 10/04/2001 2 PM 35.41 10/04/2001 TPM SOTS' 10/04/2001 12 PM ■3673 10/04/2001 11 AM 45:^ 10/04/2001 10 AM 5077 10/04/2001 9 AM 7732 10/04/2001 SAM 45.74 10/04/2001 7 AM 4573 10/04/2001 6 AM 4374 10/04/2001 5 AM 4573 10/04/2001 7am 4477 10/04/2001 SAM ■3678 10/04/2001 7am 4475 10/04/2001 Tam 4072

10/03/2001 Daily Average: 35.25

10/02/2001 Daily Average: 26.23

10/01/2001 Daily Average: 10.66

‘The information contained in this database should be considered provisional and may be subject to adjustment upon final analysis.

“The reading exceeds a level of concern for sensitive groups. Effects for some people may include respiratory symptoms and aggravation of lung or heart disease.

***The unit, ug/m3, is the mass of fine particles in micrograms (a millionth of a gram) in a cubic meter of air.

http://oaspub. epa. gov/nyr/pm_monitoring?p_addr_id=PUNIV 10/9/01

CONFIDENTIAL, CITY_21MC100_001879000 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 NYC-WTC_000178327

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NYC-WTC_000178327Source: NYC Law Department, mirrored locally

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