40 CFR § 63.5885 - How do I calculate percent reduction to demonstrate compliance for continuous lamination/casting operations?

You may calculate percent reduction using any of the methods in paragraphs (a) through (d) of this section.

(a) Compliant line option. If all of your wet-out areas have PTE that meet the requirements of EPA Method 204 of appendix M of 40 CFR part 51, and all of your wet-out area organic HAP emissions and oven organic HAP emissions are vented to an add-on control device, use Equation 1 of this section to demonstrate compliance. In all other situations, use Equation 2 of this section to demonstrate compliance.

$\text{PR}=\frac{\text{(Inlet)}-\text{(Outlet)}}{\text{(Inlet)}}\times 100\text{(Eq. 1)}$

Where:

PR = percent reduction;

Inlet + HAP emissions entering the control device, lbs per year;

Outlet = HAP emissions existing the control device to the atmosphere, lbs per year.

$\mathrm{PR}=\frac{\left({\mathrm{WAE}}_{\mathrm{ci}}+O_{\mathrm{ci}}\right)-\left({\mathrm{WAE}}_{\mathrm{co}}+O_{\mathrm{co}}\right)}{\left({\mathrm{WAE}}_{\mathrm{ci}}+{\mathrm{WAE}}_u+O_{\mathrm{ci}}+O_u\right)}\times 100\text{(Eq. 2)}$

Where:

PR = percent reduction;

WAEici = wet-out area organic HAP emissions, lbs per year, vented to a control device;

WAEiu = wet-out area organic HAP emissions, lbs per year, not vented to a control device;

Oju = oven organic HAP emissions, lbs per year, not vented to a control device;

Ojci = oven organic HAP emissions, lbs per year, vented to a control device;

WAEico = wet-out area organic HAP emissions, lbs per year, from the control device outlet;

Ojco = oven organic HAP emissions, lbs per year, from the control device outlet.

(b) Averaging option. Use Equation 3 of this section to calculate percent reduction.

$\mathrm{PR}=\frac{\left(\sum _{i=1}^m{\mathrm{WAEi}}_{\mathrm{ci}}+\sum _{j=1}^n{\mathrm{Oj}}_{\mathrm{ci}}\right)-\left(\sum _{i=1}^m{\mathrm{WAEi}}_{\mathrm{co}}+\sum _{j=1}^n{\mathrm{Oj}}_{\mathrm{co}}\right)}{\left(\sum _{i=1}^m{\mathrm{WAEi}}_{\mathrm{ci}}+\sum _{j=1}^n{\mathrm{OJ}}_{\mathrm{ci}}+\sum _{i=1}^m{\mathrm{WAEi}}_u+\sum _{j=1}^n{\mathrm{OJ}}_u\right)}\times 100\text{(Eq. 3)}$

Where:

PR = percent reduction;

WAEici = wet-out area organic HAP emissions from wet-out area i, lbs per year, sent to a control device;

WAEiu = wet-out area organic HAP emissions from wet-out area i, lbs per year, not sent to a control device;

WAEico = wet-out area organic HAP emissions from wet-out area i, lbs per year, at the outlet of a control device;

Oju = organic HAP emissions from oven j, lbs per year, not sent to a control device;

Ojci = organic HAP emissions from oven j, lbs per year, sent to a control device;

Ojco = organic HAP emissions from oven j, lbs per year, at the outlet of the control device;

m = number of wet-out areas;

n = number of ovens.

(c) Add-on control device option. Use Equation 1 of this section to calculate percent reduction.

(d) Combination option. Use Equations 1 through 3 of this section, as applicable, to calculate percent reduction.

[70 FR 50127, Aug. 25, 2005]