Minn. R. 7011.1720
PERFORMANCE TEST METHODS
Unless another method is approved by the commissioner, any person required to submit performance tests for a nitric acid production unit shall utilize the following test methods: A. Method 1 for sample and velocity traverses; B. Method 2 for velocity and volumetric flow rate; C. Method 3 for gas analysis; and D. Method 7 for the concentration of NO 2 .