Hum, never heard the term "copper sheers" . What do you mean?
k
You can find used skid sheers online for good places such as www.machinerytrader.com, www.machinefinder.com, www.texasskidsteer.com, www.equipmentlocator.com and www.skidsteerbargains.com.
you could be taking water from a river with bacteria or oil and chemicals
If the weather is warm chemicals need to be put in by the next day. Wait any longer than that and algae could become a problem and that will take many days and more money spent on chemicals to get it right.
Except for the fracking fluid manufacturers, no one knows what's in that stuff - which is a huge problem because there could be anything in it.
Find a way to burn the waste without releasing chemicals
Given its an ionic compound, you could probably just disassociate it with water. Or you could react it with a more electrophilic metal than Copper is.
Applying chemicals that could be dangerous when in contact with skin. There's no real hard and fast thing they're used for, though I most commonly see them used to apply soldering paste to copper.
Copper sulfide. Depending on the valence of copper, you could have CuS or Cu2S
They could, since magnesium is more reactive than copper, and could displace it to form magnesium nitrate.
They used any weapons made of copper. (copper knife, sword, axe, anything copper they could get their hands on).
copper pieces only
No, the chemicals interact with each other and may cause danger.