Trisodium phosphate (TSP), formerly used as a detergent additive, is used as a cleaning agent and degreaser to prepare surfaces for painting. TSP also reacts with the ferric ion of rust to form an impermeable coating of FePO, which paint will bind to. How would the excessive use of TSP affect the alkalinity of the wastewater from such an operation? Would it be too high, too low, or unaffected? Please explain.