Help with Editing/Rejection

[joaojlle]

Hello everyone. I'm having a little bit of difficult to get the horizon leveled with this photo, could you please give me a help with it?
I already tried to level with the tarmac and with the Water Tank.

The last rejection link: https://www.jetphotos.com/viewqueued_b.php?id=7064618

[LimaFox Spotter]

https://www.jetphotos.com/viewqueued_b.php?id=6228041

Can you guys please help me know if it is too much or too little? Thank you very much.

[AIJ70760]

I got this picture rejected 2 times due "Horizon unlevel", the first upload was right and now I made the level with the red & white barrel in the back, with that refference I saw 3 more points of refference to see the picture with the correct horizon but again the rejected veredict was "Horizon unlevel" so my question here is what I need to take as refference to make the Horizon level?...