BOARD MEETING DATE: December 1, 2006
AGENDA NO. 28

Mobile Source Committee

SYNOPSIS:

The Mobile Source Committee met Friday, November 17, 2006. 
Following is a summary of that meeting.

RECOMMENDED ACTION:

Receive and file the attached report.

Dr. S. Roy Wilson, Vice Chair
Mobile Source Committee

Attendance

The meeting started at 9:01 a.m.  Present were Committee Vice Chair Roy Wilson (via videoconference) and Committee Member Jane Carney.  Committee Member Jim Silva arrived at 9:15 a.m.  The following items were presented:

INFORMATION ITEMS:

3. Preview of Summary of VOC and Carbonyl Measurements from MATES III
   This item was taken out of order so Dr. Ospital could attend another meeting.   Staff summarized the preliminary VOC and carbonyl measurements from the MATES III data.  The air toxics sampling was conducted between April 2004 and March 2006.  The analyses for VOCs and carbonyls has been completed.  Initial analyses shows a downward trend particularly with respect to butadiene and benzene when compared to MATES II.  For formaldehyde and acetaldehyde, there was little difference from MATES II to MATES III.  The analyses for PM components are scheduled to be completed by 2006. The next steps will be to complete sample analyses (including the PM source markers), update the toxic emissions inventory, use modeling to estimate levels over the region, and apply PM source apportionment calculations.  Staff tentatively plans to present another update to the Mobile Source Committee in the beginning of 2007 as the information becomes available. 

1. Status Report on Efforts to Attain PM Standards at Rubidoux Air Monitoring Station
   Dr. Laki Tisopulos, Assistant Deputy Executive Officer, Planning, Rule Development, and Area Sources, gave the staff presentation.  Rubidoux was the only monitoring station out of attainment with the now revoked federal annual PM10 standard.  However, recent data from the Mira Loma monitoring station indicates an extraordinary correlation to Rubidoux, meaning that the PM10 air quality is not just a localized issue, but representative of a sub-regional problem.  Notwithstanding the revoked standard, sufficient evidence indicates that diligent efforts are still needed.  On November 6th, staff met with Riverside County Supervisor Tavaglione and Board Member Jane Carney regarding these relevant issues and the Supervisor has offered to assist staff with seeking continued progress in reducing PM10 emissions from private properties (i.e., paving of roads and working with home owners) around the Rubidoux monitoring station that are not addressed under the current local redevelopment efforts.  Staff has also committed to the following:  examine the feasibility of dust suppressants on unpaved roads; consider mandating street sweeping; ensure Rule 403 enforcement, and conduct additional monitoring as necessary.  Staff will continue to provide regular updates to the committee.
    
2. Status Report on Draft 2007 AQMP
   Dr.Laki Tisopulos provided an update on the Draft 2007 AQMP.  CARB has recently released the latest on-road and off-road mobile source inventories (EMFAC 2007 and off-road model).  The revised inventories reflect significant changes in the numerical values of the emission inventory as well as the temporal and spatial distribution of these emissions, which could potentially have significant ramifications in the overall performance of the air quality models, attainment strategy, and size of the black box.  Compared to the draft AQMP inventory, the overall VOC emissions from mobile sources have decreased by 50 tons per day (tpd) in 2020 while the NOx and PM2.5 emissions have increased by 16 and 8 tpd, respectively.  The revised inventories will be used to re-run the AQMP’s air quality modeling analysis to determine potential impacts on model performance, attainment demonstration, and size of the black box.  Staff is currently in the process of addressing the remaining issues regarding the revised inventories (e.g., VMT overestimation, temporal profiles) before proceeding with its modeling analysis. 

CARB has recently held two public workshops on its proposed control concepts for mobile sources and consumer products which will provide the basis for the development of the State strategy component of the AQMP (along with District staff’s recommended control measures) expected in January 2007.  The focus of these measures will be to implement near-term strategies for attaining the PM2.5 standard by 2015 with additional long-term measures as needed for the 8-hour ozone attainment by 2020.  The level of reductions anticipated from CARB’s proposed concepts are 25% NOx, 10% VOC, 50% SOx, and 10% PM2.5 reductions by 2014 which fall short of the estimated reductions from the District staff’s recommended control measures (i.e., 36% NOx, 24% VOC, 70% SOx, and 14% PM2.5).  Subsequent air quality modeling will be conducted by both agencies to update the attainment demonstration (incorporating the latest mobile source inventory).  Staff has already conducted 6 public workshops on the draft 2007 AQMP with three additional workshops planned within the next two weeks.

Board member Carney expressed concern over the District’s potential request to the U.S. EPA for a “bump up” to the “extreme” classification for the federal 8-hour ozone standard and the potential impact on stationary sources which have already been regulated.  She also questioned the number of control measures in the Plan which are not quantified and how the mitigation fees (identified in several measures) will be used.  Staff responded that the next round of air quality modeling will determine the need for or the extent of the black box which will be the basis for the bump-up request.  Also, staff is attempting to quantify a number of the stationary control measures but is acknowledging that due to the complexities involved and the lack of adequate data, some of the measures may not be quantified at this time.  Staff also responded that the mitigation fees collected will predominantly be spent on reducing emissions from mobile sources (e.g., accelerating fleet turn-over, retrofits) as well as from stationary and area sources.  Board member Silva also highlighted the need for an extensive mass transit in the region as a means of facilitating the attainment of the federal air quality standards.

4. Rule 2202 Activity Report
   Written report submitted.  No comments.
    
5. Monthly Report on Environmental Justice Initiatives – CEQA Document Commenting Update.
   Written report submitted.  No comments.
    
6. Report on Scientific, Technical & Modeling Peer Review Group
   Written report submitted.  No comments.
    
7. Other Business
   None.
    
8. Public Comment
   None.

The meeting adjourned at 10:15 a.m.

Attachment

SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT
MOBILE SOURCE COMMITTEE
APRIL 28, 2006
ATTENDANCE ROSTER

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