Sewer Gas coming from Vent Pipe? New Septic & New Plumbing, Everything in the house works but the...

New Septic & New Plumbing, Everything in the house works but the Vent Pipe at top of roof must be emit odors as we smell it when outside.
Answers:    To troubleshoot I would start at the diverter box coming out of the septic. If system is split leach system change diverter to side not anyone used. Make sure diverter has a PVC hat screwed in it. Make sure the septic lid is on and you own flow to septic. Should have a verbs out outside the house approximately 2 to 5 feet from side of house where on earth sewer comes out. Make sure there is a hat on that. Think the problem is that outside air is getting contained by your septic tank and finding its route back to house. Or system wishes to be diverted to unused leach field so that used side can drain. Check solids horizontal of tank. Helpful bit. If you use bleach your killing your germs. Hope this helps. Good luck.
That's what the vent pipe is for. Is the vent somewhere close to a social nouns or is the septic system ,tank,parasite field the problem?