Appendix J NSPS Subp. EE

Permit Appendix J for 40 CFR pt. 60, subp. EE

Contents of this appendix: - Calculation of VOCs emitted per unit coating solids applied o Mass of VOCs used during each calendar month . Equation E1 o Total volume of coating solids used in each calendar month . Equation E2 o Determination of transfer efficiency . Table 1 . Equation E3 (if needed) o Calculation of volume-weighted average mass of VOCs consumed per unit volume coating solids applied . Equation E4

J.1 Calculation of mass VOCs used during each calendar month 40 CFR Section 60.313(c)(1)(i)(A); Minn. R. 7011.2550

Calculate the mass of VOC's used (Mc+Md) during each calendar month using the following equation (Equation E1). Equation E1: Where:

Md = the mass of VOC-solvent used for thinning consumed (kilograms)

Mc = the mass of VOCs in coatings consumed, as received (kilograms)

Lci = the volume of each coating consumed, as received (liters)

Dci = density of each coating, as received (kilograms per liter)

Wci = the proportion of VOC's in each coating (or input stream), as received (fraction by weight) n = the number of different coating used during the calendar month m = the number of different diluent VOC-solvents used during the calendar month

J.2 Calculation of the total volume of coating solids used each calendar month 40 CFR Section 60.313(c)(1)(i)(B); Minn. R. 7011.2550 Calculate the total volume of coating solids used each calendar month using the following equation (Equation E2). Equation E2:

aq-12-01j • 4/30/15 Page 1 Ls = the volume of coating solids consumed (liters)

Lci = the volume of each coating consumed, as received (liters)

Vsi = the proportion of solids in each coating (or input stream), as received (fraction by volume) n = the number of different coating used during the calendar month

J.3 Determination of transfer efficiency 40 CFR Section 60.313(c)(1)(i)(B); Minn. R. 7011.2550 Select the appropriate transfer efficiency from Table 1. If the Permittee can demonstrate to the satisfaction of the Administrator that transfer efficiencies other than those shown are appropriate, the Administrator will approve their use on a case-by-case basis. Transfer efficiency values for application methods not listed below shall be determined by the Administrator on a case-by-case basis. The Permittee must submit sufficient data for the Administrator to judge the accuracy of the transfer efficiency claims. Table 1: Transfer Efficiencies Application Methods Transfer Efficiency (T) Air atomized spray 0.25 Airless spray 0.25 Manual electrostatic spray 0.60 Non-rotational automatic electrostatic spray 0.70 Rotating head electrostatic spray (manual and automatic) 0.80 Dip coat and flow coat 0.90 Electrodeposition 0.95

Where more than one application method is used within a single surface coating operation, the Permittee shall determine the composition and volume of each coating applied by each method through a means acceptable to the Administrator and compute the weighted average transfer efficiency by the following equation (Equation E3). Equation E3: Where: T = the weighted average transfer efficiency (fraction)

Lcik = the volume of each coating consumed, as received (liters)

Vsik = the proportion of solids in each coating (or input stream), as received (fraction by volume) T = the transfer efficiency for each application method (fraction)

Ls = the volume of coating solids consumed (liters) n = is the number of coatings used

2 p = is the number of application methods used.

J.4 Calculation of VOC’s consumed per volume coating solids applied Calculation of the volume-weighted average mass of VOC’s consumed per unit volume of coating solids applied (G) during the calendar month 40 CFR Section 60.313(c)(1)(i)(C); Minn. R. 7011.2550 Calculate the volume-weighted average mass of VOC's consumed per unit volume of coating solids applied (G) during the calendar month for each affected facility using the following equation (Equation E4). Equation E4: Where:

Mo = the mass of VOC's in coatings consumed, as received (kilograms)

Md = the mass of diluent VOC-solvent consumed (kilograms)

Ls = the volume of coating solids consumed (liters) T = the transfer efficiency (fraction)

Note: The value for G equals the volume-weighted average mass of VOC emissions discharged to the atmosphere (N) during the calendar month, which is the number used for demonstration of compliance.

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