U.S. Environmental Protection Agency Office of Mobile Sources P5READ.TXT February 24, 1995 (contact and file information updated 12/17/98) To All PART5 Model Users: Re-release of PART5 Particulate Emission Factor Model The Office of Mobile Sources (OMS) has revised the particulate emission factor model, PART5, which was originally distributed in August 1994. This newest version of the PART5 model has been updated to correct the problems explained in the "PART5 User Information Sheets #1 and 2", as well as a few other problems discovered since then. The use of this revised version of the PART5 model will not be required in PM10 inventories and analyses until three months after the Federal Register announcement, which is not scheduled until the summer. However, states can now use this version of the model as the most recently approved particulate model for PM10 inventories and analyses. The revised version of PART5 has modified the fugitive dust emission factors to be fleet-average, rather than vehicle specific, values. The inputs for lines 6 (originally vehicle class-specific average weights) and 7 (originally vehicle class-specific average number of wheels) have been modified to require one number on line 6 (the fleet average vehicle weight) and one number on line 7 (the fleet average number of wheels), when WHEELFLAG=2 on line 2. The output format has also been changed to reflect this modification in the fugitive dust emission factor calculations. The new PART5 version will also print unpaved and paved dust emission factors as calculated using the methodology in AP42 minus tailpipe and tire-wear emissions (in the fugitive dust emission factor section of the output). These numbers will alert the model user to avoid double counting of emission factors. The particle size cutoff problem has been corrected in this newest version. The FORTRAN code has been modified, as was shown in the remedy section of User Information Sheet #1. It is now possible to input a minimum of 1.0 micron as the particle size cutoff for all pollutants except fugitive dust, which still has a minimum of 2.5 microns. Two separate model runs (as described in the remedy section of User Information Sheet #2) are no longer necessary for fugitive dust and tire-wear emission factors to be calculated separately. The optional user input on line 7 for fleet average number of wheels will be used by PART5 to calculate fugitive dust emission factors. The model will automatically use internal values for vehicle class-specific average number of wheels for the tire-wear emission factor calculations. Problems which were discovered more recently, and which users had not yet been notified of, include an error in the user input of mileage accumulation rates and registration distributions, and a problem found which limited the number of scenarios possible in a single PART5 run to 100. User-supplied mileage accumulation rates and registration distributions will now be utilized correctly in PART5. The limit on number of scenarios in a single run has been raised to 30,000. Background PART5 differs from the previous particulate model (released in 1985) in the following ways: It reflects the low sulfur diesel fuel regulation of October 1993, it reflects lower particulate standards, there is an expansion of the heavy-duty diesel vehicle classification into five sub-categories and a separation of the light-duty cars and trucks by gasoline and diesel. Additions in the new model include an option to print gaseous SO2, the calculation of fugitive dust for paved and unpaved roads based on algorithms developed by the Office of Air Quality Planning and Standards (Unpaved Roads - AP42, section 11.2.1, 9/88, Paved Roads - draft AP42, section 11.2.x, 3/93), and an option to calculate idle emissions developed from manufacturers' data. The mileage accumulation rates, vehicle counts, diesel sales fractions, registration distributions and catalyst fractions also were updated to be consistent with MOBILE5. Acknowledgements Contributions to the PART5 model and user's guide were given by Systems Applications International with subsequent work by Computer Science Corporation. PART5 Available on the Web PART5 and all of the related computer files are now available on the Web at http://www.epa.gov/oms/models.htm. There are three files associated with PART5: PART5.ZIP, PKUNZIP.EXE, and P5READ.TXT. Please read the P5READ.TXT file (this file) first for an explanation of how to unzip the model, an explanation of the files (when unzipped), and directions on how to run the model. PART5 Microcomputer System Requirements The FORTRAN compiler now available to OMS produces a version of the PART5 executable code which requires both a machine which uses a 80386 microprocessor and that has a math coprocessor chip installed. This requires that the program be run on a machine capable of using extended/expanded memory. As a result, with the given understanding of the limitations of the compiler and the size of the program, PART5 will require, at minimum, the following microcomputer hardware configuration for DOS machines: - IBM compatible 80386 or better (such as 80486). - At least two (2) megabytes of RAM memory. - Math coprocessor chip (such as Intel 80387) Microcomputers using the 80286 microprocessor will not be able to run the PART5 model. Upon request, an executable version of the PART5 model compiled to run on Apple Macintosh microcomputers is available from EPA. Users with Apple Macintosh systems should not experience any problems with the Macintosh version of the PART5 model as long as sufficient RAM memory (at least 2 megabytes) is available. Since some of these system requirements are a result of the particular FORTRAN compiler that was used, users with FORTRAN compilers may want to attempt to compile the source code themselves to have greater control over the characteristics of the final executable application. DESCRIPTION OF THE MODEL PART5 is a Fortran program for use in the analysis of the particulate air pollution impact of in-use gasoline-fueled and diesel-fueled motor vehicles. It calculates particle emission factors in grams per mile (g/mi) from on-road automobiles, trucks, and motorcycles, for particle sizes up to 10 microns. The particulate matter emission factors include exhaust particulate, exhaust particulate components, brakewear, tirewear, and reentrained road dust, all of which are required for PM10 inventories and analyses. The program contains default values for most data required for the calculation of all the emission factors, but it also allows for user-supplied data in many cases. All of the required inputs and optional inputs are described in detail in the PART5 User Guide. The methodology for the calculation of the emission factors is described in the appendix of the PART5 User Guide. Questions about this document or the PART5 model can be addressed to: PART5 User's Guide -- Comments U.S. Environmental Protection Agency Assessment and Modeling Division 2000 Traverwood Drive Ann Arbor, MI 48105 Fax: (734) 214-4368 GETTING STARTED To run the model the user must change to the directory in which the executable file, PART5.EXE and the driver file, PART5.IN, reside. After editing the driver file PART5.IN (see the discussion of how to set up the driver file below), the user can run the model by typing "PART5" at the DOS prompt. The first four lines of the driver file (PART5.IN, when running non-interactively) instruct the particulate model how to run. The first line is a single character "N" or "Y" for no or yes to the question "Do you want to run interactively?" If the first line was "N", then the second line is the name of the input file. The next line of the driver file contains the name of the report file, which will contain all the computed emission factors. The last line is the name of the error output file, which will contain all the error and warning messages from the program. If there are no errors the error output file will be empty. An example of the PART5.IN driver file is: N BUS2.IN BUS2.OUT ERR.OUT If the user wishes to run PART5 interactively, the driver file (PART5.IN) must still be used. "Y" is entered in the first line, the remaining lines in the driver file (PART5.IN) are not used. The program will require each line of the input interactively, starting with the name of the report file and the name of the error input file. The user will not be prompted for those file names. This is not the preferred method of running the model due to the complexity of the input. It is recommended that the non-interactive approach be used, which will provide a record of the input file that can be used in review and in detecting and correcting any errors. The input formats following the first four line of the driver file are similar to those for MOBILE5. At this point you enter a project identification (a descriptive label that will be echoed back as part of the emission factor report file), and values for all of the control flags, which specify whether you are using default data supplied with the program or your own data (see Chapter 2 of the PART5 User Guide "Program Controls and User-Supplied Data"). This is followed by the data specified to be used in lieu of the default data. Finally, you enter all of the scenario inputs. These are comprised of standard inputs that must be supplied for all model runs, including the evaluation year, particle size cutoff, scenario title, fugitive dust parameters, and average vehicle weight within each vehicle class (see Chapter 3 of the PART5 User Guide "Scenario Inputs"). Multiple scenarios may be run using one set of default or user-supplied data. Sample input and output files are included to show the proper format for all of the available options. The sample input files contain default data, showing the actual values which are internal to the model. The corresponding output files echo the input with the emission factors in the chosen formats. The file PART5.ZIP contains *.FOR (Source Code Files), *.INC (Include Files which contain references to Common Variables), PART5.EXE the executable file, *.IN (Example Input Files), *.OUT (Example Output Files), PART*.DRV (Driver Files to run the Example Input Files, must be renamed to "PART5.IN"), P5BAT.BAT which is the DOS batchfile used to run the Example Input Files, and three user guide files described below. Microsoft Windows is required to view and print the user guide. PKUNZIP.EXE is used to uncompress these files. User Guide Files: part5ug.pdf Main body of User Guide part5uga.pdf User Guide Appendix The free Acrobat Reader for viewing/printing Adobe Portable Document Format (PDF) files is available from the Adobe web site at http://www.adobe.com. *.INC BASEFD.INC DFSBLK.INC GPBHP.INC GSFCOM.INC HDFLEET.INC IDLE.INC IOU.INC PARAM.INC PSIZE.INC REGIS.INC RESULT.INC RESULTA.INC ROADFE.INC SCENE.INC BYMYM.INC FRACT.INC LEAD.INC NAMES.INC FLAGS.INC TRAP.INC EFGAS.INC *.FOR GASSLF.FOR OUTDT1.FOR OUTDT2.FOR O3B1.FOR O3B2.FOR O3B3.FOR MAIN.FOR BLOCK.FOR DIESL.FOR TAMPER.FOR EFCALX.FOR O5P1.FOR O5P3S1.FOR O5P2.FOR O5P3S2.FOR O3P3B2.FOR O3P3B3.FOR O3P3B1.FOR OUTPUT.FOR INPUT.FOR PART*.DRV PARTVMT2.DRV PARTVMT3.DRV PARTFM5.DRV PARTMY.DRV PARTPRT2.DRV PARTBUS2.DRV PARTMANY.DRV PARTTRAP.DRV PARTPRT1.DRV *.IN MY.IN PRT1.IN VMT2.IN PRT2.IN BUS2.IN MANY.IN FM5.IN TRAP.IN VMT3.IN *.OUT MY.OUT PRT1.OUT VMT2.OUT PRT2.OUT BUS2.OUT MANY.OUT FM5.OUT TRAP.OUT VMT3.OUT