River water pump gland

Why was this different from all the other times The river water pump gland was originally lubricated with grease. About 15 years earlier, in an effort to reduce potential environmental situations, such as an occasional sheen on the river water discharge, the grease lubrication was replaced with environmentally friendly well water. Furthermore, it is believed that when a river water pump was shut down for scheduled maintenance, the motor was shut off and the well water was turned off immediately. Despite the fact that this area handled only water, we must be concerned about the impurities that can be dissolved in the water. [3]... 

---