Haz disposal for us too. Our local conenience center (dump) will take it. I don’t remember there being a charge, and it’s open nearly every day so it is convenient for us in VA.
I think the bleed order is:
1. Front Left (driver’s side front)
2. Rear Right (passenger’s side rear)
3. Front Right (passenger’s side front)
4. Rear Left (driver’s side rear)
Mainly due to the fact that DOT4 is more hydroscopic than DOT3. Or in other words, DOT4 really likes water which is one the main reasons you have to replace brake fluid.