A boom screed machine including a chemical spray system. The boom screed machine includes a platform assembly, a boom, a vertical column, a plow head crossbar, a plow head, a tank, a pump, platform assembly tubing, a pressure regulating valve, a chemical spray fluid hose, a reel system, plow head crossbar tubing, a solenoid valve, and a spray head. The pump is configured to receive the chemical spray fluid and pump the chemical spray fluid through the platform assembly tubing, the chemical spray fluid hose, the plow head crossbar tubing, and the spray head when the solenoid valve is open and the pump is activated.