NR 440.647(6)(f)2. 2. The sampling time for each run shall be 1 hour in which either an integrated sample or 4 grab samples shall be taken. If grab sampling is used, then the samples shall be taken at 15 minute intervals.

NR 440.647(6)(f)3. 3. Published or calculated values shall be used for the net heats of combustion of the sample components. If values are not published or cannot be calculated, ASTM D2382-88 or D4809-95, incorporated by reference in s. NR 440.17 (2) (a) 30. and 61., may be used to determine the net heat of combustion of component “j”.

NR 440.647(6)(g) (g) The owner or operator shall determine compliance with the exit velocity provisions in s. NR 440.18 as referenced by sub. (3) (a) 1. a. 3) as follows:

NR 440.647(6)(g)1. 1. If applicable, the net heating value (HT) of the process vent shall be determined according to the procedures in par. (f) to determine the applicable velocity requirements.

NR 440.647(6)(g)2. 2. If applicable, the maximum permitted velocity (Vmax) for steam-assisted and nonassisted flares shall be computed using the following equation:

where:

Vmax is the maximum permitted velocity, m/sec (ft/sec)

K4 is 28.8 for metric units and 1212 for English units

K5 is 31.7 for metric units and 850.8 for English units

HT is the net heating value as determined in par. (f), MJ/scm (Btu/scf)

NR 440.647(6)(g)3. 3. The maximum permitted velocity, Vmax, for air-assisted flares shall be determined by the following equation:

+

=

where:

Vmax is the maximum permitted velocity, m/sec (ft/sec)

K6 is 8.706 m/sec for metric units and 28.56 ft/sec for English units

K7 is 0.7084 [(m/sec)/(MJ/scm)] for metric units and 0.00245 [(ft/sec)/(Btu/scf)] for English units

HT is the net heating value as determined in par. (f), MJ/scm (Btu/scf)

NR 440.647(6)(g)4. 4. The actual exit velocity of a flare shall be determined by dividing the volumetric flow rate (in units of standard temperature and pressure), as determined by Method 2, 2A, 2C or 2D as appropriate, by the unobstructed (free) cross sectional area of the flare tip.

NR 440.647(6)(h) (h) The owner or operator shall determine compliance with the mass emission per mass product standards in sub. (1) (d) and (e) and in sub. (3) (b) 1. a., (c) 1. a. 1), b. 1), 2. a. and b. 1).

NR 440.647(6)(h)1. 1. The emission rate of TOC shall be computed using the following equation:

=

where:

ERTOC is the emission rate of total organic compounds, minus methane and ethane, kg TOC/Mg product (lb TOC/ton)

ETOC is the emission rate of total organic compounds, minus methane and ethane, in the sample, kg/hr (lb/hr)

Pp is the rate of polymer production, kg/hr (lb/hr)

K5 is 1,000 kg/Mg for metric units and 2,000 lb/ton for English units

NR 440.647(6)(h)2. 2. The mass rate of TOC, ETOC, shall be determined according to the procedures, as appropriate, in par. (c) 2. The sampling site for determining compliance with sub. (1) (d) and (e) shall be before any add-on control devices and after all product recovery devices. Otherwise, the sampling site shall be at the outlet of the control device.

NR 440.647(6)(h)3. 3. The rate of polymer production, Pp, shall be determined by dividing the weight of polymer pulled (in kg (lb)) from the process line during the performance test by the number of hours taken to perform the performance test. The weight of polymer pulled shall be determined by direct measurement or, subject to prior approval by the department, computed from materials balance by good engineering practice.