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Source Category Codes List File Information

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SCCLIST: This file contains the unique listing of the codes used to link both the organic and particulate matter speciation data to the TOG (total organic gas) and PMT (total particulate matter) data in CEIDARS. It also contains the SCC1N -> SCC8N fields, which contain categorical descriptions.

  1. SCC: Field containing the Source Category Codes assigned to emission sources. This field may contain SCC codes (as used by the U.S. EPA and CARB) or EIC (Emission Inventory Code) codes, which are 14 digit codes defined and used by CARB. CARB uses both the SCC and EIC codes to define emissions in its CEIDARS database. These codes will allow you to link to the emissions estimates in the CEIDARS database, in order to speciate the emissions.
  2. SCC1N -> SCC8N: These fields contain descriptions that define nested categories. In other words, the SCC8N category description is also grouped within a broader category of SCC6N and on down though the nested categories to SCC1N, which is the broadest category, which is signified by a single digit of the code.

Master-detail link diagram

Using the data

The codes in this file are used in order to link CEIDARS TOG or PMT source emissions to the TOG or PMT/PM10/PM25 size fraction-specific compound data contained in the ORGPROF/ORGSPEC or PMPROF/PMSPEC files.  Note that a TOG or PM speciation profile may link to many SCC/EIC designated source codes.