Region 7 Air Program
Serving Iowa, Kansas, Missouri, Nebraska and 9 Tribal Nations
Kansas City Ozone Maintenance Plan - Second Ten-Year Plan
Background of the Plan: The Kansas City area (Clay, Jackson and Platte Counties in Missouri and Johnson and Wyandotte Counties in Kansas) was designated nonattainment with respect to the 1-hour ozone standard in 1978. In 1991 the area was able to demonstrate that it had attained the standard and EPA redesignated the area to attainment in 1992. At the same time, a plan to maintain the 1-hour standard for a period of ten years was approved. This plan was revised in 2002 and demonstrates once again how the standard will be maintained for a second ten-year period, through 2012.
Summary of the Plan: The plan relies on an emissions budget for volatile organic compounds (VOC) and nitrogen oxides (NOx) to maintain the ozone standard through a combination of control measures. These measures include both stationary and mobile source controls. The state agreed to continue monitoring ambient air quality, to periodically update the emissions inventory to ensure it is consistent with the budget, and to implement certain contingency measures if the emissions level is exceeded or the standard is violated. The Missouri plan was approved by EPA on January 13, 2004 (See 69 FR 1921).
Emission Reductions : One means of demonstrating continued attainment is to show that emissions during the period of the maintenance plan will not exceed the level of emissions existing at the time of attainment. This revised plan relies on an attainment level of emissions of VOCs and NOx to maintain the ozone standard through a combination of control measures. These measures include stationary, area and mobile source controls. The annual emissions from the area for 1999, a period when no exceedances or violations of the standard occurred, and 2012, the last year of the maintenance plan, are shown in the table below.
Emissions in the Kanas City Maintenance Area
1 The term ozone summer day is abbreviated as OSD.
As can be seen, the analysis projects decreases in total emissions during the ten-year maintenance period. Thus the plan has demonstrated that the 1-hour ozone standard will be maintained.
Stationary Source Regulations: This plan relies upon continued implementation of regulations that reduce emissions from stationary sources and include the following rules:
Other Contingency Regulations:
Mobile Source Control Measures: Mobile source control measures approved in the plan include the Federal motor vehicle emissions control program and reductions in the volatility of gasoline. In addition, the plan relies upon lower volatility gasoline to control fuel volatility (10 CSR 10-2.330, Control of Gasoline Reid Vapor Pressure).
This revised plan also revised the motor vehicle emissions budgets. These budgets are used to ensure that transportation plans conform to the SIP. The new, area-wide budgets are shown in the table below:
Area-wide Motor Vehicle Emissions Budget for 2012
Other Features: The current ambient air quality monitoring network consisting of six monitors operating in the Kansas City area is described. Two monitors are located in Liberty and Watkins Mill Park and are considered to be downwind monitors; two are placed in populated areas at Rocky Creek, previously located at the Worlds of Fun, and the Kansas City International Airport; one is placed upwind at Richards Gebaur Airport; and one is located downtown in Kansas City, Kansas. The state did commit to continue monitoring the air quality for the next ten years.
An updated emission inventory was prepared for the Kansas City area for the year 1999. Emissions were then projected for the year 2012. These inventories, as a part of a revised maintenance plan, were submitted by Missouri and Kansas on December 17, 2002, and January 9, 2003, respectively.
Continued maintenance of the ozone standard depends, in part, upon the state's efforts toward tracking air quality and VOC and NOx emissions. The state has committed to updating the emissions inventory for the Missouri portion of the Kansas City maintenance area every three years. This inventory will include point, area, mobile and biogenic emissions sources.
Contingency Measures: As required by the CAA, contingency provisions are provided in the plan. The state commitment includes a two-level response. During the first two years of the plan, 2003 and 2004, existing control measures along with any necessary contingency measures will be used to achieve at least a five percent reduction in area-wide emissions in response to a violation of the national ambient air quality standard (NAAQS) for ozone.
For the remaining years of the maintenance plan, 2005 through 2012, two different triggers would initiate an evaluation and selection of appropriate control measures to implement. A response would be invoked whenever a future emissions inventory shows that VOC or NOx levels are more than five percent above the 1999 emission inventory levels or there is a pattern of exceedances measured at the ambient air quality monitors. At that time Missouri would work cooperatively with Kansas to evaluate and determine what and where controls may be required and the level of emissions reductions needed. The study would be completed within nine months and control measures adopted within 18 months of the determination.
A response would also be invoked whenever the NAAQS was violated. At that time an analysis would be completed within six months and control measures adopted within 18 months. Missouri committed to implement any necessary contingency measures within 24 months after a violation of the 1-hour ozone standard. For both triggers, a number of potential point source, mobile source, and area source control measures are identified.
Additional Information: An implementation rule for the 8-hour ozone standard was proposed on June 2, 2003 (see 68 FR 32802). Part of the proposed rule concerns transition from the 1-hour standard to the 8-hour standard. At the time this document was posted to our website, the 8-hour implementation rule had not been finalized.
EPA Region 7 Contact: Amy Bhesania, (931) 551-7147, firstname.lastname@example.org