NR 440.644(4)(j)4.4. A minimum face velocity of 30.5 meters (100 feet) per minute shall be maintained continuously through each permanent opening into the enclosure when all temporary enclosure openings are closed. The cross-sectional area of each permanent opening shall be divided into at least 12 equal areas, and a velocity measurement shall be performed at the centroid of each equal area with an anemometer or similar velocity monitoring device; the face velocity of each permanent opening is the average value of the velocity measurements taken. The monitoring device shall be calibrated and operated according to the manufacturer’s instructions. Temporary enclosure openings shall remain closed at all time except when worker access is necessary. NR 440.644(4)(j)5.5. The total area of all permanent openings into the enclosure may not exceed the area that would be necessary to maintain the VOC concentration of the exhaust gas stream at 25% of the lower explosive limit (LEL) under the following conditions: NR 440.644(4)(j)5.b.b. The face velocity through each permanent opening is 30.5 meters (100 feet) per minute. NR 440.644(4)(j)6.6. All captured VOC are ducted to a VOC emission control device that is operated on a continuous basis and that achieves at least a 95% destruction or recovery efficiency. NR 440.644(4)(j)7.7. The efficiency of the control device (E) for the initial performance test shall be determined by using values of the volumetric flow rate of each of the gas streams and the VOC content (as carbon) of each of the gas streams in and out of the control device as described under par. (f) 2. b. The control device efficiency shall be redetermined during conditions specified under par. (b) 3. NR 440.644(4)(k)(k) Each owner or operator of an affected facility who initially elected to be subject to the applicable percent emission reduction requirement specified under sub. (3) (a) 1. a., 2. a., 6. a., 7. b., 8. a., 9. a. or 10. a. and who later seeks to comply with the applicable total (uncontrolled) monthly VOC use limit specified under sub. (3) (a) 1. b., 2. b., 6. b., 7. b., 8. b., 9. b. or 10. b. shall demonstrate, using the procedures described under par. (c), that the total VOC use at the affected facility has not exceeded the applicable total (uncontrolled) monthly VOC use limit during each of the last 6 months of operation. The owner or operator shall be subject to the applicable percent emission reduction requirement until the conditions of this paragraph and sub. (7) (g) are satisfied. NR 440.644(4)(L)(L) In determining compliance for each undertread cementing operation, each sidewall cementing operation, each green tire spraying operation, each Michelin-A operation, each Michelin-B operation, and each Michelin-C-automatic operation, the owner or operator shall include all the VOC used, recovered, or destroyed from cements and organic solvent-based green tire sprays including those cements or sprays used for tires other than those defined under sub. (2) (a). NR 440.644(4)(m)(m) In determining compliance for each tread end cementing operation, each bead cementing operation, and each green tire spraying operation, the owner or operator shall include only those tires defined under sub. (2) (a) when determining To and Bo. NR 440.644(4)(n)(n) For each undertread cementing operation and each sidewall cementing operation that does not use a VOC emission reduction system, the owner or operator shall use the following procedure to determine compliance with the VOC emission per tire limit specified in sub. (3) (b): NR 440.644(4)(n)1.1. Calculate the total mass of VOC (Mo) used at the affected facility for the month by the following procedure. NR 440.644(4)(n)1.a.a. For each affected facility for which cement is delivered in batch or via a distribution system which serves only that affected facility: “n” equals the number of different cements or sprays used during the month
NR 440.644(4)(n)1.b.b. For each affected facility for which cement is delivered via a common distribution system which also serves other affected or existing facilities: 1) Calculate the total mass (M) of VOC used for all of the facilities served by the common distribution system for the month: where:
“n” equals the number of different cements or sprays used during the month
2) Determine the fraction (Fo) of “M” used by the affected facility by comparing the production records and process specifications for the material cemented at the affected facility for the month to the production records and process specifications for the material cemented at all other facilities served by the common distribution system for the month or by another procedure acceptable to the department.
3) Calculate the total monthly mass of VOC (Mo) used at the affected facility:
Mo = MFo
NR 440.644(4)(n)2.2. Determine the total number of tires (To) processed at the affected facility for the month by the following procedure: NR 440.644(4)(n)2.a.a. For undertread cementing, To equals the number of tread or combined tread/sidewall components which receive an application of undertread cement. NR 440.644(4)(n)2.b.b. For sidewall cementing, To equals the number of sidewall components which receive an application of sidewall cement, divided by 2. NR 440.644(4)(n)3.3. Calculate the mass of VOC used per tire processed (G) by the affected facility for the month: NR 440.644(4)(n)4.4. Calculate the mass of VOC emitted per tire processed (N) for the affected facility for the month: N = G
NR 440.644(4)(n)5.5. Where the value of the mass of VOC emitted per tire processed (N) is less than or equal to the VOC emission per tire limit specified under sub. (3) (b), the affected facility is in compliance.