Russ Steele
We are all concerned about our air quality and want to do some thing about it, including those charged with the responsibility of keeping our air clean. But, it is vital we identify those truly responsible and not look for emotional scapegoats.
Improving air quality will be topic of meeting, October 27, 2006
To address the worsening air quality in western Nevada County, the Northern Sierra Air Quality Management District must prepare a plan to lower ozone concentrations and meet national air quality standards.
First we must recognize that the NSAQMD is only responsible for stationary sources, they have no control over the mobile sources. Mobile sources (car, trucks and trains) are the responsibility of the California Air Resources Board (CARB).
Nevada County’s air has gotten dirtier in the past five years, with ozone and other vehicle exhaust pushed into the foothills from the Sacramento and Bay areas. According to the American Lung Association, the county’s air is the 12th worst in the nation for ozone air pollution; in 2000, it ranked 35th in the nation.
The real culprit in increasing ozone and the precursor NOX in Nevada County are the mobile sources in the Valley and Bay Area. As the population in these areas increase, so does the number of vehicles on the road, thus creating more ozone and precursors that blow into the foothills, especially Nevada County. So, where is California's major population growth coming from?
From 10:30 a.m. to noon on Monday, the air district will hold a public meeting at the Madelyn Helling Library, 980 Helling Way, in Nevada City.
The district will discuss the nature of ozone, summarize federal requirements, and gather suggestions on reasonably available local measures and strategies to reduce ozone concentrations.
At this meeting the most important qualifier is “reasonably available local measures and strategies” Remember 90 percent of the ozone is coming from the Valley and Bay Area mobile sources. Curtailing these resources is the responsibility of the California Air Resources Board. According to the CARB emissions model Western Nevada County NOx will continue to decline through 2027. Here are CARB's NOx numbers in tons-per-day for Western Nevada County:
2002 9.72
2008 5.30
2018 2.10
2027 1.09
It looks to me like we are making significant progress, that is if we can believe the CARB Model. Unfortunately, I do not have much faith in CARB's air quality, or climate change models. They are based on the assumptions. Garbage in, Garbage out, unless those assumptions have been validated.
I have asked Mike Woodman at the Transportation Commission to ask CARB for more details on their modeling assumptions. What assumptions have they made? How were they validated? Are they assuming the all Californians are will be driving smaller lighter vehicles, starting in 2009 under the new greenhouse gas reduction regulations? What assumptions have they made about the exchange rate of older vehicles for less polluting vehicles manufactured after 2009? These are only a few of the assumptions that need to be examined and validated.
If you attend, the important thing to remember at Monday's meeting is that NSAQMD can only influence the stationary sources, the auto paint shops, the cloths cleaners, and other business that use solvents. The amount of precursors these local business produce is swamped by the NOx and ozone that blows in from outside the County. We must NOT force local business to spend million of dollars to make insignificant reductions, when we know who the real culprits are. Let’s apply some common sense and not let your emotions run away with your brain.
If you are interested in some Western Nevada County ozone trends, check out the SESF Data Bank
UPDATE: The Union link does not seem to be working. Here is the meeting details from AQMD:
On October 30, 2006, from 10:30 A.M. until 12:00 Noon, the NSAQMD will hold a Public Meeting at the Madeline Helling Library, 980 Helling Way, Nevada City, CA to present and discuss federal requirements under the Clean Air Act and to accept public comments relating to reasonably available control measures for ozone precursors. Public presentation times may be limited to ensure that all who wish to speak may be heard. Written comments may be submitted at the Workshop or sent to the NSAQMD’s District Headquarters in Grass Valley via mail or email at the address above, to be received no later than October 27, 2006. For additional information, please call NSAQMD headquarters at (530) 274-9360
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