HomeMy WebLinkAboutIR 7466 INFORMAL REPORT TO CITY COUNCIL MEMBERS No. 7466
To the Mayor and Members of the City Council
May 15, 1990
JEX Subject: AIL AIR QUALITY UPDATE
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On May 9, 1990, the Environmental Protection Agency (EPA)
indicated the 1987-89 ozone design value for the Fort
Worth/Dallas region had decreased for the second consecutive
year. The design value is used in determining the percentage of
volatile organic compound emissions reduction necessary to reach
the National Ambient Air Quality Standard for ozone of .12 parts
per million(ppm) . In 1987 , the design value was . 16ppm or 33%
above the standard , in 1988 the design value was reduced to
.14ppm or 17% above the standard and for 1989 the design value
fell to .13ppm or 8% above the standard. Staff feels this
reduction indicates the air quality within the metroplex region
is gradually improving and hopefully with the implementation of
the recent Inspection and Maintenance program and lowering the
volatility of gasoline the design value will remain the same or
decrease to .12ppm.
The .13ppm ozone design value, based on the proposed amendments
to the clean air act, classify the metroplex as moderate Class
I. This classification currently limits the level of mandatory
controls cities will be required to implement under the clean air
act as amended. Staff, however, believes we should continue to
enhance our control efforts to further reduce the levels of ozone
while increasing economic growth within Fort Worth.
Staff will provide further information as it becomes available.
1�
David Ivory
City Manager
ISSUED BY THE CITY MANAGER FORT WORTH, TEXAS
HOURLY OZONE DESIGN VALUES
IN EPA REGION 6
OZONE VALUES (ppm)
0.24 -
0.22 -
0.2
0.18 OZONE LEVELS_ LOWER
0.16 _ .
0.14 _ .�3- 110- lag9
* 0.12 y��5 I�aN vAluE
0.1 -
0.08 -
0.06 -
0.04 -
0.02 - u
0 — _ -
Houston El Paso D/FW Baton Rouge Beaumont Tulsa Lake Charles
CMSA CMSA
METROPOLITAN STATISTICAL AREAS
1985-87 IM 1986-88
* National Ambient Air Quality Standard CITY WDr nif