NR 463.25(3)(b)1.c.c. Method 3, 3A or 3B to determine the dry molecular weight of the stack gas. NR 463.25(3)(b)2.2. Collect a minimum sample volume of 60 dscf of gas during each total metal HAP sampling run. A minimum of 3 valid test runs are needed to comprise a performance test. NR 463.25(3)(b)3.3. For cupola metal melting furnaces, sample only during times when the cupola is on blast. NR 463.25(3)(b)4.4. For electric arc and electric induction metal melting furnaces, sample only when metal is being melted. NR 463.25(3)(c)(c) Fugitive emissions. To determine compliance with the opacity limit in s. NR 463.23 (1) (a) 7. for fugitive emissions from buildings or structures housing any emissions source at the iron and steel foundry, you shall use the following test method and procedures: NR 463.25(3)(c)2.2. Conduct each test such that the opacity observations overlap with the PM performance tests. NR 463.25(3)(d)(d) Volatile organic HAP emissions from cupola furnaces and scrap preheaters. To determine compliance with the applicable VOHAP emissions limit in s. NR 463.23 (1) (a) 8. for a cupola metal melting furnace or in s. NR 463.23 (1) (a) 9. for a scrap preheater, you shall use the following test methods and procedures: NR 463.25(3)(d)1.a.a. Method 1 or 1A to select sampling port locations and the number of traverse points in each stack or duct. Sampling sites shall be located at the outlet of the control device, or at the outlet of the emissions source if no control device is present, prior to any releases to the atmosphere. NR 463.25(3)(d)1.b.b. Method 2, 2A, 2C, 2D, 2F or 2G to determine the volumetric flow rate of the stack gas. NR 463.25(3)(d)1.c.c. Method 3, 3A or 3B to determine the dry molecular weight of the stack gas. NR 463.25(3)(d)1.e.e. Method 18 to determine the VOHAP concentration. Alternatively, you may use Method 25 to determine the concentration of total gaseous nonmethane organics (TGNMO) or Method 25A to determine the concentration of total organic compounds (TOC), using hexane as the calibration gas. NR 463.25(3)(d)2.2. Determine the average VOHAP, TGNMO or TOC concentration using a minimum of 3 valid test runs. Each test run shall include a minimum of 60 continuous operating minutes. NR 463.25(3)(d)3.3. For a cupola metal melting furnace, correct the measured concentration of VOHAP, TGNMO or TOC for oxygen content in the gas stream using Equation 1: where:
CVOHAP is the concentration of VOHAP in ppmv as measured by Method 18 in 40 CFR part 60, Appendix A, incorporated by reference in s. NR 484.04 (16) or the concentration of TGNMO or TOC in ppmv as hexane as measured by Method 25 or 25A in 40 CFR part 60, Appendix A, incorporated by reference in s. NR 484.04 (19) or (20) %O2 is the oxygen concentration in gas stream, percent by volume (dry basis)
NR 463.25(3)(d)4.4. For a cupola metal melting furnace, measure the combustion zone temperature of the combustion device with the CPMS required in s. NR 463.26 (1) (d) during each sampling run in 15-minute intervals. Determine and record the 15-minute average of the 3 runs. NR 463.25(3)(e)(e) Volatile organic HAP emissions from automated pallet cooling lines or automated shakeout lines. To determine compliance with the VOHAP emissions limit in s. NR 463.23 (1) (a) 10. for automated pallet cooling lines or automated shakeout lines you shall use either the procedures in subds. 1. and 3. or subds. 2. and 3. NR 463.25(3)(e)1.1. To demonstrate compliance by direct measurement of total hydrocarbons, a surrogate for VOHAP, use all of the following procedures: NR 463.25(3)(e)1.a.a. Using the VOC CEMS required in s. NR 463.26 (1) (g), measure and record the concentration of total hydrocarbons, as hexane, for 180 continuous operating minutes. You shall measure emissions at the outlet of the control device, or at the outlet of the emissions source if no control device is present, prior to any releases to the atmosphere.