View all text of Subpart WW [§ 52.2470 - § 52.2502]
§ 52.2502 - Best available retrofit technology requirements for the Alcoa Inc.—Wenatchee Works primary aluminum smelter.
(a) Applicability. This section applies to the Alcoa Inc.—Wenatchee Works primary aluminum smelter (Wenatchee Works) located near Wenatchee, Washington and to its successors and/or assignees.
(b) Best available retrofit technology (BART) emission limitations for Potline 5—(1) Sulfur dioxide (SO
(i) Compliance demonstration. Alcoa must determine SO
(A) The carbon ratio is the calendar month average of tons of baked anodes consumed per ton of aluminum produced as determined using the baked anode consumption and aluminum production records required in paragraph (h)(2) of this section.
(B) The % sulfur in baked anodes is the calendar month average sulfur content as determined in paragraph (b)(1)(ii) of this section.
(C) The % sulfur converted to SO
(ii) Emission monitoring. The % sulfur of baked anodes must be determined using ASTM Method D6376 or an alternative method approved by the EPA Region 10.
(A) At a minimum, Alcoa must collect no less than four baked anode core samples during each calendar week.
(B) Calendar month average sulfur content must be determined by averaging the sulfur content of all samples collected during the calendar month.
(2) Particulate matter (PM) emission limit. Starting November 10, 2014, PM emissions from the Potline 5 Gas Treatment Center stack must not exceed 0.005 grains per dry standard cubic foot of exhaust gas.
(3) Nitrogen oxides (NO
(i) Compliance demonstration. Alcoa must determine NO
(ii) NO
(iii) NO
(c) Best available retrofit technology (BART) emission limitations for Anode Bake Furnace #62—(1) Sulfur dioxide (SO
(i) Compliance demonstration. The weighted monthly average sulfur content of coke used in manufacturing shall be calculated as follows:
Weighted average percent sulfur = ∑(C(ii) Emission monitoring. Alcoa must test each shipment of coke for sulfur content using ASTM Method D6376 or an alternative method approved by the EPA Region 10. Written documentation from the coke supplier certifying the sulfur content is an approved alternative method.
(2) Particulate matter (PM) emission limit. Starting November 10, 2014, the PM emissions from the anode bake furnaces stack must not exceed 0.01 grains per dry standard cubic foot of exhaust gas.
(3) Nitrogen oxides (NO
(i) Compliance demonstration. Compliance shall be demonstrated through fuel purchase records.
(ii) Best Available Retrofit Technology (BART) Nitrogen oxides (NO
(d) Best available retrofit technology (BART) emission limitations for Ingot Furnace 1 (IP-1), Ingot Furnace 2 (IP-2), and Ingot Furnace 11 (IP-11)—(1) Particulate matter (PM) emission limits. Starting November 10, 2014, the PM emissions from each of ingot furnaces IP-1, IP-2, and IP-11 must not exceed 0.1 grains per dry standard cubic foot of exhaust gas.
(2) Nitrogen oxides (NO
(3) Sulfur dioxide (SO
(i) Compliance demonstration. Alcoa must demonstrate compliance through fuel purchase records.
(ii) [Reserved]
(e) Best available retrofit technology (BART) particulate matter (PM) emission limitations for the Green Mill. (1) Starting November 10, 2014, the PM emissions from the Green Mill Dry Coke Scrubber must not exceed 0.005 grains per dry standard cubic foot of exhaust gas.
(2) Starting November 10, 2014, the PM emissions from the Green Mill Dust Collector 2 must not exceed 0.01 grains per dry standard cubic foot of exhaust gas.
(f) Best available retrofit technology (BART) particulate matter (PM) emission limitations for alumina handling operations. (1) Starting November 10, 2014, the opacity from the alumina handling fabric filters (21M and 19C) must not exceed 20 percent.
(2) Starting November 10, 2014, the PM emissions from the alumina rail car unloading baghouse (43E) must not exceed 0.005 grains per dry standard cubic foot of exhaust gas.
(g) Source testing. (1) Alcoa must perform source testing to demonstrate compliance with emission limits established in this section upon request by the EPA Region 10 Administrator.
(2) The reference test method for measuring PM emissions is EPA Method 5 (40 CFR part 60, appendix A).
(3) The reference test method for measuring opacity from the alumina handling fabric filters (21M and 19C) is EPA Method 9 (40 CFR part 60, appendix A).
(4) The EPA Region 10 may approve the use of an alternative to a reference test method upon an adequate demonstration by Alcoa that such alternative provides results equivalent to that of the reference method.
(h) Recordkeeping. Except as provided in paragraph (h)(6) of this section, starting November 10, 2014, Alcoa must keep the following records:
(1) Alcoa must retain a copy of all calendar month Potline 5 SO
(2) Alcoa must maintain records of the baked anode consumption and aluminum production data used to develop the carbon ratio.
(3) Alcoa must retain a copy of all calendar month carbon ratio and potline SO
(4) Alcoa must record the calendar day and calendar month production of aluminum.
(5) Alcoa must record the calendar month average sulfur content of the baked anodes.
(6) Starting January 7, 2015, Alcoa must retain a copy of all calendar month potline NO
(7) Alcoa must record the sulfur content of each shipment of coke and the quantity of each shipment of coke.
(8) Alcoa must keep fuel purchase records showing the type(s) of fuel combusted in the anode bake furnaces.
(9) Alcoa must keep fuel purchase records showing the type(s) of fuel combusted in the ingot furnaces.
(10) Records must be retained at the facility for at least five years and be made available to the EPA Region 10 upon request.
(i) Reporting. (1) Alcoa must report SO
(2) Alcoa must report NO
(3) Alcoa must report the monthly weighted average sulfur content of coke received at the facility for each calendar month during the compliance period to the EPA Region 10 at the same time as the annual compliance certification required by the Part 70 operating permit for the Wenatchee Works is submitted to the Title V permitting authority.
(4) Alcoa must report the fuel purchase records for the anode bake furnaces and the ingot furnaces during the compliance period to the EPA Region 10 at the same time as the annual compliance certification required by the Part 70 operating permit for the Wenatchee Works is submitted to the Title V permitting authority.
(5) All documents and reports must be sent to the EPA Region 10 electronically, in a format approved by the EPA Region 10, to the following email address: [email protected].