Linetype that will not purge

Having an issue with linetypes that are proprogating within all our drawings in our office...  I have tried to purge, delete all and wblock and nothing seems to work.  The only thing that I found to work is superpurge...

Junk is the drawing that I erased everything.  (junk drawing is 2.6M with nothing in it...)  click on this link to download... https://hsea.sharefile.com/d-s31594802f6f49e2a 

I wblocked out wblock drawing and the size fell but the file still has all the linetype...

If I draw something in wblock and copy clip it to another drawing then I get all the extra linetype from wblock dwg...

Thanks for anything.

Jeff

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