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25 Task 2--Develop airport specific measurement plan VIII. PERSON(S) DEVELOPING THE PROBLEM focused on near field and far field measurements down- Sandy Webb, Environmental Consulting Group, LLC in wind of various airport functions including runways, association with: Phil Whitefield (Whitefield Scientific taxiways, and the terminal. Consulting), Richard C. Miake-Lye (Aerodyne, Inc.), Task 3--Execute measurement plan; anticipated 5 days and Ted Thrasher (CSSI, Inc.) at each airport venue to complete all measurement. Task 4--Reduce and analyze data. IX. PROCESS USED TO DEVELOP PROBLEM Task 5--Prepare and submit draft and final report. STATEMENT This problem statement is the product of an ACRP The anticipated product is a data set with interpretation project (ACRP02-04), carried out by the authors of this consistent with that produced in the JETS APEX2 and Problem Statement. Delta Atlanta Hartsfield series of studies containing emission factors suitable for EDMS and estimates of X. DATE AND SUBMITTED BY source apportionment. This problem statement is submitted by Sandy Webb, Environmental Consulting Group, LLC in association V. ESTIMATE OF THE PROBLEM FUNDING with: Phil Whitefield (Whitefield Scientific Consult- AND RESEARCH PERIOD ing), Richard C. Miake-Lye (Aerodyne, Inc.), and Ted Recommended Funding: A total of $600,000 is esti- Thrasher (CSSI, Inc.) as part of the project report for mated for completing the program. ACRP 02-04 on December 21, 2007. Research Period: A one-year program is proposed. Synthesis Report VI. URGENCY AND PAYOFF POTENTIAL Airport Emission Source Markers Airports are currently being required to provide estimates or Fingerprints of PM emissions from airport-related sources without sufficient data to confidently compute the characteristics A wide variety of PM emission sources operate at commercial or concentration at the airport fence-line, so the need to airports. Their emissions combine in the ambient air and are be able to quantify PM emissions from the sources of this then transported off of the airport through normal atmospheric study is critical. The payoff of the proposed research processes. Once off the airport it is difficult to isolate individual would be an improved understanding of how these PM emission sources, for example, when evaluating the impact of emissions evolve as they are transported to exposed pop- airport operations on workers, passengers, and nearby commu- ulations, including airport workers, passengers, and nities. It would be a significant benefit to airports if there were nearby residents. The resulting PM emissions data could characteristic markers or "fingerprints" of individual sources be used directly in developing airport inventories and sup- that were unique to those sources. Such markers would also en- porting risk assessments of nearby community groups. hance particle deposition studies around airports, more reliably identifying the presence of airport-related emissions VII. RELATED RESEARCH Many airport emission sources have been studied individ- The proposed work would be a new project related to ually (e.g., APEX 1, 2, and 3) and others are proposed in this the evolution of the PM from sources named. A sepa- report (e.g., Problem Statements 1 and 2). These studies will rate project, ACRP 02-08 has been defined to relate produce data such as particle size number, mass, and com- airport operation to impacts in ambient air off the air- position from a range of aircraft engines, APUs, GSE, and port. ACRP 02-08 will not evaluate the end state of other emission sources. Individual or combined particle PM evolution from airport sources (primarily aircraft characteristics (i.e., size number, mass, composition) may and GSE), which is necessary to understand exposure uniquely represent emissions from specific sources. Once the impacts to airport workers, passengers, and citizens experimental data from all completed projects referenced living adjacent to the airport. Some related work has above are available, a synthesis review should be conducted been done on aircraft engine emissions under to identify unique markers or fingerprints for as many source JETS/APEX2 and the Delta/Atlanta-Hartsfield projects categories as possible. This will aid airports in addressing and similar field campaigns. Recent work under community complaints and analyzing community impacts. PARTNER Project 11 also has looked at time-integrated As with other ACRP synthesis reports, the budget for this re- emissions from an airport in total. Neither project has port would be $25,000; however this is a minimal budget for fully evaluated particle evolution, especially for all conducting such a study and it may not be feasible to identify airport sources. markers for all airport sources in a single synthesis study.