NY State air quality data tables, 1999-2001

NYC 9/11 Public Portal Document

NITRIC OXIDE & NITROGEN DIOXIDE - Continuous Chemiluminescence NYSDEC Region 2 Metropolitan Air Quality Control Region Annual Averages 1989 through 1999 Bronx Sites Nitric Oxide - Annual Arithmetic Mean (ppm) Station Site No. 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 . 1999

IS 155 7094-03 (-014)

IS 52 7094-07 (.030)

Nitrogen Dioxide - Annual Arithmetic Mean (ppm) - Primary Standard (12 month average not to exceed 0.05 PPM *) Station Site No. 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 IS 155 7094-03 (.030)

IS 52 ____________ 7094-07 — — — — — — — — — (.032) Sampling at 7094-03 commenced on 2/23/99 and ended on 7/19/99; sampling commenced at 7094-07 on 10/7/99. Comparison Between NYS Ambient Air Quality and Ambient Air Quality Standards for Calendar Year 1999 Nitric Oxide One-Hour Averages Nitrogen Dioxide One-Hour Averages

Observations Highest Values, PPM Observations I Highest Values, PPM

% % ^nd Station Site No. Total Avail 1“ 3"* Total Avail I" 2”^ 3"“

IS 155 7094-03 2,216 66 .271 .265 .249 2,216 66 .112 .104 .095 [05/21, [05/22, [05/21, [05/31, [05/31, [05/31, 24] 01] 23] 12] 11] 13]

IS 52 7094-07 930 32 .415 .414 .358 930 32 .085 .077 .076 [10/30, [10/29, [10/30, [10/29, [10/17, [10/29, 01] 24] 02] 17] 11] 16]

(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

NYC-WTC_000186105