MC Tank was the worst, avoid like the plague.

Stay far away from this company. I've been an owner operator hauling chemicals for 8 yrs and I very much regret signing with this company. You will starve for income and revenue as they're bottom feeders. They go for loads that are not driver friendly. I lost count at the number of times I had to get creative just to get my semi trailer in a good enough position to get unloaded.
Poor rates and my income for the year dipped by over $50,000 from previous jobs. One year I barely cleared $100K gross. Pathetic And that was one of the reasons I had to leave and find a company that was driver friendly and paid well. The recruiter at the time I signed on said I would easily make over $200K gross a year. Thats just not true. It's an illusion.
Some of the trailers were rarely maintained with parts missing, lights not working, crappy tires etc. And the dispatcher I had to deal with, played favorites and gave the best loads to his buddies he could speak Spanish with. And when I did get a decent load, they never gave me enough time to deliver on time. Bottom line is that there are better opportunities out there. Don't waste you time with MC tank