NY State air quality data tables, 1999-2001

NYC 9/11 Public Portal Document

CARBON MONOXIDE - Continuous Non-Dispersive Infrared NYSDEC Region 2 Metropolitan Air^^uality Control Region Annual Averages 1989 through 1999 Annual Arithmetic Mean (ppm) Station Site No. 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 350 Canal Street 8100-02N 2.9 2.8 2.8 3.1 2.6 2.3 2.1 1.9 1.7 1.6 1.5

Brooklyn Transit 8100-03 3.0 2.6 2.4 2.1 2.2 2.2 1.9 1.9 1.7 1.6 1.5

225 E. 34* Street 8100-06 (2.3) 2.3 2.1 1.9 1.9 1.7 1.6 1.3 1.3 1.3

Bloomingdales 8100-07 (2.9) 2.4 2.7 2.5 (2.4) (2.2) 1.7 Comparison Between NYS Ambient Air Quality and Ambient Air Quality Standards for Calendar Year 1999 One-Hour Average Running 8-Hour Average (Non-Overlapping) Ma?dmum not to exceed 35 PPM more than once per Maximum not to exceed 9 PPM more than once per calendar year * calendar year *

Observations Highest Values, PPM Observations Highest Values, PPM

Total % >35 >9 Days Station Site No. Obs. Avail PPM 3rd 2"*^ 3^ 1“ Total PPM 1“ 9PP M

350 Canal Street 8100-02N 8,530 97 0 9.3 7.1 6.2 8,582 0 5.0 4.1 3.9 0 [08/12, [08/12, [10/29, [10/30, [08/12, [11/23, 21] 20] 24] 03] 23] 19] Brooklyn Transit 8100-03 8,434 96 0 7.8 7.3 6.6 8,518 0 5.4 5.0 4.7 0 [10/29, [09/27, [01/21, [10/30, [05/22, [01/21, 23] 14] 08] 05] 05] 14]

225 E. 34* Street 8100-06 8,455 97 0 5.8 5.4 5.4 8,527 0 4.9 4.8 3.7 0 [10/29, [01/25, [05/22, [10/30, [05/22, [11/23, 23] 15] 01] 03] 06] 18] Bloomingdales 8100-07 8,376 96 0 6.8 6.2 5.9 8,434 0 5.5 4.7 4.4 0 [10/29, [10/29, [10/30, [10/30, [02/16, [01/21, 231 221 02] 04] 14] 12]

(Annual Means in parentheses are based on less than 75% available data) N=NAMS (National Air Monitoring Station) [Date of Occurrence, Hour] *New York and Federal Ambient Air Quality Standard + Denotes a contravention of NYS/Federal AAQS (Note: 9PPM standard is not exceeded unless 8-hour avg > 9.4 PPM)

NYC-WTC_000186087