Up Links
Download Option for Speciation Profiles
This page last reviewed February 21, 2013
DefaultxxStwdxxxx20120920 This
is the DOWNLOAD OPTION page. From the SPECIATION links column at the
left of the page, you can also choose the INTERACTIVE OPTION, which
allows the scanning, printing and download of all or selected portions
of the data files. The interactive option allows you to
search/filter on a variety of data fields. The
DOWNLOAD OPTION allows access to the same information that is available
from the INTERACTIVE OPTION pages, as well as some additional
data. The DOWNLOAD OPTION files use slightly different terms
and data breakdowns from the INTERACTIVE OPTION. Be sure and
read the cautions on the INTERACTIVE OPTION and/or DOWNLOAD OPTION
pages describing where the data definitions differ, before attempting
to combine data from the two approaches. You are probably
best to work with one approach or the other, at least until you are
familiar with the two sets of data. The
SPECIATION links column at the left of this page also provides
background information describing how the speciation data were
developed, what the terms used in conjunction with the data mean, and
how the data can be used to calculate single compound concentrations
from nonspeciated total organic gas (TOG) or particulate matter (PM)
emission estimates. The WHAT'S NEW link and the links under
RECENT UPDATES allow you to see recent changes to the speciation
profiles. The USING DATA link shows example calculations. The
SOURCE CODES link explains how the SCC and/or EIC codes are assigned to
the speciation profiles. These SCC and/or EIC codes are also
assigned to the emission
inventory, providing the link between the emissions and the
speciation profiles. The DEFINITIONS link explains terms used
to describe the profiles and their chemical groupings. SPECIATION PROFILES: The ARB's current
PM and Organic Gas Speciation Profiles are available for download from
this page as Excel spreadsheet files (PMPROF
and ORGPROF). Each speciation profile
provides weight fraction data of each chemical species making up the
total particulate matter of total organic gas, and is designated by an
identification code number. The
chemical species are identified by a 5-digit SAROAD code, a 9-digit
Chemical Abstract Service (CAS) number (where available), and the
chemical name. For
PM, there are also PM size fraction tables, which provide the
particulate mass within each size fraction (PM total, PM 10, or PM 2.5)
for individual source categories. The PMSIZE
spreadsheet file contains a summary of the PM size fractions for each PM profile. To
compute the amount of a specific chemical constituent in the PM size
fraction of interest, each PM chemical weight fraction must be
multiplied by the appropriate PM size fraction. A cross-reference file SCC_ASSIGN_FRACTIONis
also available that indicates which PM and Organic Gas profile is
assigned to each source category in the inventory. This latest
version of the file has been partitioned into the following 4 sections:
Zero Year (all years);
1975-1995; 1996-2015; 2016-2035. (click on the year ranges to access the files) Partitioning
the file was necessary, due to the limitations of the size of Excel
spreadsheets. Even though they are split into smaller files, you will
still need Excel 2003 or later to open these Excel files.
Note that the contents of the YEAR field in the Zero Year (all years) file is 0 (zero).
That means that the SCC codes in this file have the same
profile set assigned for all years. By contrast, the files with file names showing
a range of years, will have YEAR fields with actual year values.
That means that profile set applies for that SCC only for that
particular year and MAY change in other years.
If you want to have the complete SCC_ASSIGN_FRACTION file set, then you
must download all 4 of the above files. Regardless of whether you want
just one, or all three of the year-specific files, you must
download the Zero Year file. That is because some of the
category entries will only be represented in the Zero Year file.
If you do not include the Zero Year file in your analysis, you
will also not be including the emissions for the associated categories
in your analysis.
The inventory source
categories are represented by an 8-digit Source Classification Code
(SCC) for point sources, or a 14-digit Emission Inventory Code (EIC)
for area and mobile sources. This file also contains the fraction of
reactive organic gas (FROG) values for organic profiles, and the PM 10
and PM 2.5 size fraction data for PM profiles. Some of the Organic Gas
Speciation Profiles related to motor vehicles and fuel evaporative
sources vary by the inventory year of interest, due to changes in fuel
composition and vehicle fleet composition over time. DOWNLOAD OPTION FILE LIST: ORGPROF
(Excel) - Organic chemical profiles for source categories PMPROF
(Excel) - Particulate matter chemical profiles for source categories PMSIZE (Excel) -
Particle size fraction data for source categories SCC_ASSIGN_FRACTION
- PM & organic profiles are assigned to each source category by
SCC and EIC.
This latest version of the file has been partitioned into the following 4 sections:
Zero Year (all years);
1975-1995;
1996-2015;
2016-2035.
(click on the year ranges to access the files) ORGANIC GAS
SPECIATION PROFILE REFERENCE INFORMATION (Excel) PARTICULATE MATTER (PM)
SPECIATION PROFILE REFERENCE INFORMATION (Excel) CITATIONS FOR
ORGANIC GAS AND PM SPECIATION PROFILES (Excel)
Please send questions or comments to:
eibweb@www.arb.ca.gov
