NR 440.62(6)(d)(d) The owner or operator shall test each piece of equipment unless he or she demonstrates that a process unit is not in VOC service, that is, that the VOC content would never be reasonably expected to exceed 10% by weight. For purposes of this demonstration, the following methods and procedures shall be used: NR 440.62(6)(d)1.1. Procedures that conform to the general methods in ASTM E168-92, E169- 93 or E260-96, incorporated by reference in s. NR 440.17 (2) (a) 73., 74. and 75., respectively, shall be used to determine the percent VOC content in the process fluid that is contained in or contacts a piece of equipment. NR 440.62(6)(d)2.2. Organic compounds that are considered by the department to have negligible photochemical reactivity may be excluded from the total quantity of organic compounds in determining the VOC content of the process fluid. NR 440.62(6)(d)3.3. Engineering judgment may be used to estimate the VOC content, if a piece of equipment has not been shown previously to be in service. If the department disagrees with the judgment, subds. 1. and 2. shall be used to resolve the disagreement. NR 440.62(6)(e)(e) The owner or operator shall demonstrate that an equipment is in light liquid service by showing that all the following conditions apply: NR 440.62(6)(e)1.1. The vapor pressure of one or more of the components is greater than 0.3 kPa at 20°C (1.2 in H2O at 68°F). Standard reference texts or ASTM D2879-97, incorporated by reference in s. NR 440.17 (2) (a) 35., shall be used to determine the vapor pressures. NR 440.62(6)(e)2.2. The total concentration of the pure components having a vapor pressure greater than 0.3 kPa at 20°C (1.2 in H2O at 68°F) is equal to or greater than 20% by weight. NR 440.62(6)(f)(f) Samples used in conjunction with pars. (d), (e) and (g) shall be representative of the process fluid that is contained in or contacts the equipment or the gas being combusted in the flare. NR 440.62(6)(g)(g) The owner or operator shall determine compliance with the standards for flares as follows: NR 440.62(6)(g)2.2. A thermocouple or any other equivalent device shall be used to monitor the presence of a pilot flame in the flare. NR 440.62(6)(g)3.3. The maximum permitted velocity for air assisted flares shall be computed using the following equation: where:
Vmax is the maximum permitted velocity, m/sec (ft/sec)
HT is the net heating value of the gas being combusted, MJ/scm (Btu/scf)
K1 is 8.706 m/sec for metric units and 28.56 ft/sec for English units
K2 is 0.7084 m4/(MJ-sec) for metric units and 0.087 ft4/(Btu-sec) for English units
NR 440.62(6)(g)4.4. The net heating value (HT) of the gas being combusted in a flare shall be computed using the following equation: where :
K is a conversion constant, 1.740 x 10-7 (g-mole) (MJ)/(ppm-scm-kcal) for metric units and 4.674 x 10-6 (g-mole) (Btu)/(ppm-scf-kcal) for English units.
Ci is the concentration of sample component “i”, ppm
Hi is the net heat of combustion of sample component “i” at 25°C and 760 mm Hg (77°F and 14.7 psi), kcal/g-mole
NR 440.62(6)(g)5.5. Method 18 and ASTM D2504-88 (reapproved 1993), incorporated by reference in s. NR 440.17 (2) (a) 31., shall be used to determine the concentration of sample component “i”. NR 440.62(6)(g)6.6. ASTM D2382-88 or D4809-95, incorporated by reference in s. NR 440.17 (2) (a) 30. and 61., shall be used to determine the net heat of combustion of component “i” if published values are not available or cannot be calculated. NR 440.62(6)(g)7.7. Method 2, 2A, 2C or 2D, as appropriate, shall be used to determine the actual exit velocity of a flare. If needed, the unobstructed (free) cross- sectional area of the flare tip shall be used.