Question regarding nonroad VOCs speciation based on NEI emission inventory

SMOKE
,
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Dear all,
Recently I am working on nonroad California VOCs speciation based on NEI emission inventory and SCC profiles. I tried to search related references and found the following process details which I would like to follow (Please find the slides and process figure attached below). But I have no idea where I can find the data of Engine size and Engine Technology etc for California. Could you please give me some instructions?
(Please note that I am working with the speciation of VOCs to real VOCs species rather than model species.)

The slides which I find useful is https://www3.epa.gov/ttn/chief/conference/ei21/session10/reichle_pres.pdf

Any details are highly appreciated！

Best regards,
Ryan

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Have you checked the SPECIATE website? I think the information you are looking for should be in that SPECIATE DBs. It has the SCC information, SCC-specific speciation profiles, and so on.

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There is a nonroad speciation report here (https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=P100UXK7.pdf)

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Many thanks for these useful materials!