PERFORMANCE TEST PROCEDURES

Subpart 1. In general. Performance tests shall be conducted according to the requirements of this part and parts 7017.2001 to 7017.2060 . Subp. 2. Sampling time and volume. In testing for sulfur dioxide and acid mist, the sampling time for each run shall be at least 60 minutes and the minimum sample volume shall be 40.6 dscf (1.15 dscm) except that smaller sampling times or sample volumes, when necessitated by process variables or other factors, may be approved by the commissioner. Subp. 3. Acid production rate. Acid production rate, expressed in tons per hour of 100 percent H 2 SO 4 , shall be determined during each testing period by a suitable method approved by the commissioner. The commissioner may require the production rate to be confirmed by a material balance over the production system. Subp. 4. Acid mist and sulfur dioxide emissions. Unless the commissioner approves another method, acid mist and sulfur dioxide emissions, expressed in pounds per ton (kg/metric ton) of 100 percent H 2 SO 4 , shall be determined by dividing the emission rate in lb/hr (kg/hr) by the acid production rate. The emission rate shall be determined by the equation, Q s x c = lb/hr (kg/hr), where Q s = volumetric flow rate of the effluent in dscf/hr (dscm/hr) as determined in accordance with part 7011.1620 , item B, and c = acid mist and sulfur dioxide concentrations in lb/dscf (kg/dscm) as determined in accordance with part 7011.1620 , item D.