Alabama PtlwerCothpany.J.H. Miller, Jr. Steam-Electric Generating Plant Permit No. -t-07-0011-03

3. FGD Operation



# I The permittee shall have installed and commenced operation of a Flue Gas Desulfurization System (FGD), also called a scrubber, on each of Plant Miller Units 3 and 4by December 31, 2011.

The permittee shall operate each FGD on Plant Miller Units 3 and 4 on a year round basis consistent with the technological limitations, manufacturers' specifications, and good engineering and maintenance practices for the FGD and so as to minimize S02 emissions to the extent reasonably practicable.

[n determining 30-day Average Removal Efficiencies for S02 under the Partial Consent Decree, the permittee shall use 40 CFR Part 60 appendix 

### A. Method 19, Section 12.5.3 and data from CEMS operated in accordance with 40

### hf&Part 75 using S02CEMS data from both the inlet and outletofthe control device; however, the missing data substitution procedures in 40 QER.Part 75 shall not apply to such determinations. For each 30-day period which begins on orafter December3l, 2011, the permittee shall comply with a 30-Day Rolling AverageRemoval Efficiency of95% for S02 for each of Plant Miller Units 3 and 4. However, in the event the permitteechooses to combustcoal with 

### asulfurcontentgreaterthan I% sulfurby weight, a 30-Day Rolling Average Removal Efficiency ofnot less than 90% shall be established. In the event the permittee chooses to revertto combustingcoal with a sulfurcontentless than I% sulfur by weight, the permittee shall revert to complying with the 30-Day Rolling Average Removal Efficiency of95% beginning with the first 30-day period available afterthe change in coal.

Forthe purposes ofcompliance with these limits: A "30-Day Rolling Average Removal Efficiency" means the percent reduction ofthe pollutant in question achieved by a unit's pollution control device over a 30-day period

as determined by 40 CFRPart 60 Appendix A. Method 19, Section 12.5.3. A new 30- Day Rolling Average Removal Efficiency shall be calculated for each new Operating Day. Each 30-0ayRolling Average Removal Efficiency shall exclude all emissions that

occurduring any period ofmalfunction (as defined in 40CFR 60.2) ofthe FGD. An "Operating Day" means any calendarday on which a Unit fires Fossil Fuel

Only in the event the permittee chooses to combust coal with a sulfur content greater than I%**~ulfur** by weight, the permittee shall evaluate the 30-Day Rolling Average Removal Efficiency that it can consistently achieve at Plant Nfiller Units 3 and 4 over a 12-month period (the "502Trial Period") that shall begin when the permittee first begins combusting such coal. During the S02Trial Period. and until the new 30-Day Rolling Average Removal Efficiency is established, the permittee 'ihall comply with a JO-Day Rolling Average Removal Efficiency ofat least 90%.

Promptly after it has been finally determined, the 30-Day Rolling Average Removal Efficiency for Plant Miller Units 3 and 4 that shall apply under this permit for the future operation ofthe Plant Miller Units 3and 4 (when cornbusting the type ofcoal combusted during the S02Trial Period) shall bejointly submitted to the court by the parties as a modification co the Decree -;o long as the Partial Consent Decree remains Page 24

Partial Consent Decree, Paragraph 40

Partial Consent Decree, Paragraph 41

Partial Consent Decree, Paragraphs 42 and43

Partial Consent Decree, Paragraphs 

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Partial Consent Decree, Paragraph 44

Partial Consent Decree. Paragraph 49 

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