Your opinion plz!

[jford]

The third one is debatable, I think, because there's a lot of detail - gas cart going out of frame, relatively significant very light patch just to left of what I think should be the visual focus, and your way-too-white signature in the lower right - which distracts and diffuses the impact. But the second and fourth make the start of a visual story about this (petrochemical?) plant. The first is too abstract (IMO) to be the lead image of your story, but is VERY well done.
Keep in mind, I'm just an amateur, these are just my opinions, and worth exactly what they cost you.
Nice work.
Thanks for sharing.

[GeoJerry]

I like that last one a lot. Some very pleasing colors in the midst of all of this jarring industrial equipment.

[baro-nite]

#1 and #2 are especially good. #3 would be improved with straightening and cropping -- unlike jford I would keep all of the people in the shot, but I would crop out a fair bit of the top and right. #4 is very interesting also but again I would go for a tighter framing. Excellent set of scenes most of us will never see.