(a) A person may not operate a wet quench tower of a coke oven battery unless it is equipped with a baffle system designed to effectively reduce particulate emissions during quenching.

(b) Except as provided in subdivision (c) of this section, the total dissolved solids concentration of any quench tower make-up water must not exceed 1,600 milligrams per liter (mg/l). Compliance with this limit will be determined by taking the arithmetic average of the total dissolved solids concentrations of each of four samples of make-up water obtained at 15-minute intervals. The total dissolved solids concentration of an individual sample will be determined by the latest American society for testing and materials method or equivalent in which the drying temperature must be 103°C.

(c) Total dissolved solids concentrations from make-up water may exceed 1,600 mg/l if it can be shown that particulate emissions from the quench tower do not exceed.45 pounds per ton of coal charged through an emissions test conducted in compliance with section 214.11(c) of this Part. If such a demonstration is made, the actual average concentration of the quench tower make-up water used during the test will become an acceptable maximum limit for the tested quench tower. If the source owner wants to use make-up water with a higher concentration then used during the quench tower emissions test, additional testing may be required.