A steel pickling operation emits 300 ppm HCl (hydrochloric acid), with peak values of 500
ppm, 15% of the time. The airflow is a constant 25,000 acfm at 75°F and 1 atm. Only sketchy information was submitted with the scrubber permit application for a spray tower. We are requestedto determine if the spray unit is satisfactory (USEPA-84/09, p. 100).