# Create gspro\_combo for different scc

**URL:** <https://forum.cmascenter.org/t/create-gspro-combo-for-different-scc/2948>\
**Category:** SMOKE\
**Created:** [January 11, 2022, 12:21pm UTC](https://forum.cmascenter.org/t/create-gspro-combo-for-different-scc/2948 "2022-01-11T12:21:16Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Hanye](https://avatars.discourse-cdn.com/v4/letter/h/a587f6/32.png) [@Hanye](https://forum.cmascenter.org/u/Hanye)\
**Post date:** [January 11, 2022, 12:21pm UTC](https://forum.cmascenter.org/t/create-gspro-combo-for-different-scc/2948/1 "2022-01-11T12:21:16Z")

</div>

Hi!  
I want to define gspro\_combo profiles for some sources with different SCCs. How can I do that?

---

<div class="post-metadata">

**Author:** ![eyth.alison](https://avatars.discourse-cdn.com/v4/letter/e/7ab992/32.png) [@eyth.alison](https://forum.cmascenter.org/u/eyth.alison)\
**Post date:** [February 7, 2022, 8:35pm UTC](https://forum.cmascenter.org/t/create-gspro-combo-for-different-scc/2948/2 "2022-02-07T20:35:06Z")

</div>

There are examples of using gspro\_combo in the EPA distributions – check the speciation zip file here:

[https://gaftp.epa.gov/Air/emismod/2016/v2/ancillary\_data/](https://gaftp.epa.gov/Air/emismod/2016/v2/ancillary_data/)

GSPRO\_COMBO is used for Canada and Mexico.

In the U.S. instead of GSPRO\_COMBO we use the extended form of the GSREF format for the oil and gas sector, for example.

[https://cmascenter.org/smoke/documentation/4.8.1/html/ch08s05s05.html](https://cmascenter.org/smoke/documentation/4.8.1/html/ch08s05s05.html)

shows that there is a speciation profile split factor in column M.