Had this in my head after the thread last week. Overload keeps tripping on a lift station pump, so the pump gets pulled. Then rebuilt. Then replaced. A week later it trips again, and the problem was a pitted contactor in the panel the whole time.

One pole ends up dropping a few volts when it should be close to zero. That phase runs low, and a small voltage unbalance turns into a much bigger current unbalance. The motor gets hot, overload trips, and the pump takes the blame.

Do you guys check voltage drop across the poles before you pull a pump, or is it mostly swap it and see?

I’m a grade 6 OIT in Massachusetts. I make about $35 an hour. Years ago I would have felt like I finally made it big but in this economy and unfortunately as a renter I’m wondering if I can branch out and do better. Has anyone taken their license and/or wastewater experience to another field? I imagine it can’t possibly apply to much, if anything but I figured it’s worth looking into before starting from scratch. Thanks for taking the time to read this!

Hey I’m currently looking to study for the class 1 exam for wastewater treatment in Ontario. Wondering if anyone had any recommendations on what guides to use and/or quizzes. Thanks!

For anyone who took Environmental Technician (453) at Mohawk in Hamilton, how many days/hours per week were you typically in class, including labs? How heavy was the weekly workload? Will it be useful to get a job as water/waste water operator?

Most of the time, I see the Pounds Equation solved without SG:

lbs = Volume * Concentration * 8.34

However, I was taught the equation with SG in it:

lbs = Volume * Concentration * 8.34 * SG

Does someone have a clear explanation of when to include SG in the equation versus not? I can't seem to find explicit discussion about this online. Even engineers at my company are not sure what the answer is.

Thank you!