Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 1 of 20 Facility Questionnaire for Primary Aluminum Reductio n Plants 1

, 2

Please provide the information requested in the following forms. Use additional copies of the survey forms for additional facilities, as needed, for your response.

This request for information is divided into four parts to be completed by each facility:

Part A General Facility Information

Part B Process and Emissions Control Devices

Part C Start

- ups and Shutdowns

Part D Previously Performed Testing and Test Report Data

Note, as stated in the cover letter from EPA, the survey response(s) ( Enclosure 1 ) and the new test results ( Enclosure 2 ) are due by May 31 , 2011

.

Please separate confidential business information (CBI) from non

- CBI for submittal to EPA. Please see the instructions in the cover letter for submitting CBI.

1 See Appendix A for an explanation of acronyms used in this document and Appendix B for a list of Hazardous Air Pollutants (HAP).

2 Please make copies and complete these forms for each facility in your company subject to this request for information, as described in the cover letter from EPA. If possible we would prefer receiving the completed forms

as electronic files in Microsoft® Word format . Please add additional rows to the tables as needed to contain your responses. Blank electronic forms are included on the disc provided with this package.Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 2 of 20 PART A : GENERAL FACILITY INFORMA TION (Please fill out a separate form for each of your facilities )

1. Name and address of the PARENT COMPANY that owns the facility:

Alcoa, Inc.

________________________________ ________________________________ 201 Isabella Street

________________________________ __________________________ Pittsburgh, PA 15212

- 5858

________________________________ ___________________

2. Name and address of legal OPERATOR of the facility, if different than the legal OWNER :
Alcoa, Inc.

________________________________ ________________________________ PO Box 472

________________________________ _______________________________ Rockdale, Texas 76567

________________________________ ______________________

3. Complete street address of facili ty (physical location):

a. Address: 4069 Charles Martin Hall Road

________________________________ ____ b. City: Rockdale

________________________________ ________________________

c. State: Texas

________________________________ ___________________________ d. Zip: 76567

________________________________ ____________________________

e. County: USA

________________________________ __________________________

4. Provide mailing address of the facility if di fferent than physical location:

a. Address:

________________________________ _____________________________ b. City:

________________________________ ________________________________

c. State:

________________________________ _______________________________ d. Zip:

________________________________ ________________________________ _

5. Facility contact able to answer technical questions about the completed survey:

a. Name (First Name, Last Name): Terry, Blodgett

______________________________ b. Title: Environmental Supervisor

________________________________ ___________

c. Telephone number: ____ 512

- 446

- 8379 _______________ ext.

_________________ d. Fax number: 51 2

- 446

- 8441

________________________________ _______________

e. E

- mail: terry.blodgett@alcoa.com

________________________________ _________

6

. Please provide an electronic copy of your current Title V operating permit and any pending

Title V operating permit modification applications (pdf file s are preferred).

7

. Please provide a copy of the facility schematic showing all of the p rimary a luminum operations that are subject to 40 CFR Part 63, Subpart LL . Please i nclud e the control

device ID numbers in the facility schematic. Refer to Emission Point Diagram which shows all control equipmentEnclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 3 of 20 PART B: PROCESS ES AND EMISSIONS CONTROL DEVICES

8

. P itch storage tanks :

0

_______________ Total number of pitch storage tanks at facility

0

_______________ Is at least one of the pitch storage tanks empty at all times?

0

_______________ Total amount of pitch used (tons per year) assuming facility

o peration at maximum capacity

8a. Please provide the c apacity (tons) of each pitch storage tank at facility (use the same pitch storage tank ID numbers as were assigned in the schematic provided in response to question 7 and add columns if necessary):

ID No.:

_ na

_________ ____________ ____________ ____________ Capacity:

__ na

________ ____________ ____________ ____________ 8b. Please provide a rationale, if applicable, for why application of an emission standard

to the p itch storage tank(s) is not practica b l e economically or technologically

Not practicable economically: _ Rockdale uses dry pencil pitch

___________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

Not practicable technologically: _______________

___________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

9

. A node bake furnac es:

3

_______________ Total n umber of anode bake furnaces at facility

> 186,000

________ Facility

- wide green a node production capacity (tons per year)

101,000

__________ Total a mount of coke used for anode production (tons per year)

assuming facility operation at maximum capacity

1 0

. A luminum production , by potline (s) (use the same potline ID numbers as were assigned in the schematic provided in response to question 7) :

Total potlines (number) and combined aluminum capacity (tons per year):

Total potlines ( 6 ) Aluminum capacity ( 294,300 US Short tons per year)

Individual potlines (add rows as necessary) and aluminum capacity (tons per year) :

Potline #

_ 3

___ Aluminum capacity ( 42,875 US short tons per year )

Potline #

_ 4

___ Aluminum capacity ( 42,875 US short tons per year )

Potline #

_ 5

___ Aluminum capacity ( 42,875 US short tons per year )Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 4 of 20 Potline # _6___ Aluminum capacity ( 42,875 US short tons per year)

Potline # _7

___ Aluminum capacity (61,400 US short tons per year )

Potline # _8

___ Aluminum capacity (61,400 US short tons per year )

1 1

. Plea se describe your facility potline types (add rows as necessary and use the same ID numbers as were assigned in the schematic provided in response to question 7) :

1 1 a. Potline ID No. Potline Type * Total No. of Pots

Potline #

___ 3

_____ _ CWPB2____ _144

______ Potline #

___ 4

_____ _CWPB2

___ _ 144

_______ Potline #

___ 5

_____ _ CWPB2

___ _ 144

_______

Potline # ___6 ____ _ CWPB2__ _144_______

Potline # ___7_____ _CWPB2__ _160_______

Potline # ___8_____ _ CWPB2___ _160_______

* Center

- work ed pre

- bake 1 (CWPB1); Horizontal stud Soderberg 1 (HSS1)

Center

- worked pre

- bake 2 ( CWPB2 ) ; Horizontal stud Soderberg 2 (HSS2)

Center

- worked pre

- bake 3 ( CWPB3 ) ; Vertical stud Soderberg (VSS)

Side

- worked pre

- bake (SWPB)

1 1 b. What is the average frequency, average number, and aver age duration of cell openings (side shield and/or door removals) for each potline?

Potline

ID Cell opening (side shield and/or door removals)

Average Frequency a Average Number b Average Duration c
(minutes)

Side shield Door Side shield Door Side shield Door

3 3 6 3 1 9 10

4 3 6 3 1 9 10

5 3 6 3 1 9 10

6 3 6 3 1 9 10

7 3 6 3 1 9 10

8 3 6 3 1 9 10

a The average number of times that at least one side shield or door of a given cell of the cited potline is open ed during a 24 consecutive hour period.

b The average number of cell openings (i.e. side shields and/or doors removed from

all the cells in the cited potline) at any given time

.Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 5 of 20 c The average length of time, in minutes, t hat a given side shield or door of a cell of the cited potline is removed

.

1 1 c

. Describe the exhaust capture/hooding system for each potline including the capture efficiency (if known) , evacuation rate, and damper system.

Potline ID Capture

efficiency (%) Evacuation

rate (scfm) Damper system? (i.e. to allow high

and low flow evacuation rates)

Yes No

3 No valid data ~1,800 X

4 No valid data ~1,800 X

5 No valid data ~1,800 X

6 No valid data ~1,800 X

7 No valid data

~ 2,100 X

8 No valid data

~ 2,1 00 X

1 1 d. Please provide a copy of the method(s) used (e.g. inspection checklist or log) to ensure that the capture efficiencies cited in the table above are achieved.

1 2

. Is total fluoride emitted from the roof vents measured with a sampling manifold or a cassette system? ( CHECK one)

_ 4, 6, 8 ____ Manifold or _ 3, 5 , 7 ________ Cassette

Three potrooms are equipped with cassettes and three potroom are equipped with manifolds.

1 2 a

. What is the total typical exhaust rate from the roof vents of each pot room ( scfm )?

Potline 3 1,800,000 SCFM T51 Pot Design

Potline 4 1,900,000 SCFM T51 Pot Design

Potline 5 1,800,000 SCFM T51 Pot Design

Potline 6 2,300,000 SCFM T51 Pot Design

Potline 7 4,000,000 SCFM P100 Pot Design

Potline 8 3,600,000 SCFM P100 Pot Design

These values represent the total flow out of a potline (two po trooms).

1 3

. Please describe your facility paste plant and emissions controls below :

Unavailable due to time Typical sulfur content of pitch

Unavailable due to time Maximum sulfur content of pitch cited in specifi cations

provided to pitch suppliers , if applicable

1.9 % by weight

___ Typical sulfur content of coke

1.9 % by weight

___ Maximum sulfur content of coke cited in specifications provided to

coke suppliers , if applicableEnclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 6 of 20 1 3 a. What is the availability and cost of coke and pitch with lower sulfur content s for your facility? What is the lowest sulfur content coke and pitch available?

Alcoa discussed at length the availability and cost of lower sulfur coke during a meeting with EPA on May 23, 2011. Please refer to the presentation provided by Alcoa for

that meeting.

1 3 b. What company (provide name and contact information) supplies your facility with the raw materials used in paste production? Please submit a copy of the current MSDS

for these materials.

Unavailable . Rockdale is a temporarily curtailed faci lity

.

1 3 c. Is any coal tar pitch (as opposed to petroleum pitch) used in your facility?

Yes

13d. Please provide information on the methodology used [e.g. assumptions made, mass balance calculations, assumed variations associated with potline type (e.g. S oderberg

versus pre

- bake), etc.] to estimate COS emissions from the facility.

Alcoa Rockdale utilized wet scrubbers on three of the six potlines which achieve some level of COS removal. Of the incoming sulfur in petroleum coke it is assumed 10%

forms COS and 90% forms SO2. Of the COS that forms and makes it to the scrubbers it is assumed 10% is removed. Hooding efficiency is also considered when estimating how much COS is routed to the wet scrubbers. On non

- wet scrubbed potlines it is assumed all COS i s released uncontrolled.

1 4

. a. Please provide information on any air pollution control device(s) controlling emissions from the pitch storage tanks, the paste plant, the anode bake furnaces, and/or the potlines at this facility using Tables 1

, 2

, 3

, 4 , a nd/or 5 , as appropriate. Please use the same ID numbers as were assigned in the schematic provided in response to question 7.

b. Does your operating permit include limits for emissions of particulate matter from the potlines and/ or limits on the sulfur content of the pitch and/or coke used to produce anodes? If so, what are those limits?

State of Texas NSR permit 56300 includes limits for particulate matter as well as sulfur emission limits that relate back to sulfur content in new petroleum coke. The limits are in Permit 56300 that was submitted in this package.

c

. Do you have any plans to install any new higher efficiency rated control devices

, or have any pending applications to add on any new controls on sources that are part of the primary aluminum reduction facility?

( CHECK one) ___________ Yes

_____ X _______ NoEnclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 7 of 20 If “Yes,” please specify and include any copies of pending permit applications as requested in item 6 in Part A.

d

. Please indicate below all emission controls that were installed or upgraded AFTER October 7, 1997 in order to meet the MACT standard s for primary aluminum reduction plants ( add rows as necessary and use the same ID numbers as were assigned in the schematic provided in response to question 7):

Description of new or

upg rade d control Emission point Emission limit Date the control or upgrade became operational

1 5

. Pollution prevention: Describe any procedures

, work practice standards

, or materials used at your facility to prevent or reduce emissions of HAP from pitch storage tanks, the paste plant, the anode bake furnaces, and/or the potlines at this facility ( as opposed to controlling pollution after it is formed)

.

_ The use of “cover mat erial” or “anode cover material” or “cover bath” is used to form a

layer over the top of carbon anode cover within the pots. This cover reduces the formation

of hydrogen fluoride (HF) gas by reducing the hydrogen molecules in the presents of

fluoride

molecules.

________________________________________________________________

____________________ _____________________________________________ ________

__________________________________________ ___________________________ ____

Numerous. Please r efer to submitted file: MactPlan.pdfEnclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 8 of 20 Table 1 a Wet Scrubber Description

1. Control d evice description and ID number ( or numbers, if several identical control devices are used to control a given emission source ) : Pot fumes are routed through ESPs then wet scrubbers before being released to the atmosphere

2. Stack or vent location of each control device ( use NAD83 and include six decimal places and add rows as necessary ):

ID No.: _10C1 __ Latitude: _ 30.565447___ Longitude: _

- 97.070207_____

ID No.: _10C2 ____ Latitude: _30.565393__ Longitude: _

- 97.070185_____

ID No.: _10C3

_____ Latitude: _ 30.565079____ Longitude: _

- 97.071289_____

ID No.: _10C4 __ Latitude: _ 30.565028____ Longitude: _

- 97.071273_____

ID No.: _10C5 ____ Latitude: __ 30.564977____ Longitude: _

- 97.071619_____

ID No.: _10C6_____ Latitude: __ 30.564922

___ Longitude: _

- 97.071592_____

ID No.: _10C7 __ Latitude: _ 30.565380_____ Longitude: _

- 97.070433_____

ID No.: _10C8 __ Latitude: _ 30.565322_____ Longitude: _

- 97.070402_____

3. Design collection efficiency and outlet concentration (add rows as necessary) :

Pollutant Collection Outlet Source of efficiency * concentration * Estimation * (if known) (if known)

PM Percent mg/dscf

_________ PM10 Percent mg/dscf

_________ PM2.5 Percent mg/dscf

_________ Total Fluorides Percent 0.57 mg/dscf

__ 1

______ Hydrogen Fluorides Percent 0.15 mg/dscf

__ 1

______ POM Percent mg/dscf

_________ COS Percent mg/dscf

_________ Other (specify) Percent mg/dscf

_________ Other (specify) Percent mg/dscf

_________ Other (specify) Percent mg/dscf

_________

* 1 = Performance testing 2 = Engineering judgment 3 = Manufacturer specs.

4 = Title V permit application 5 = Other (specify) _______________________

4. Device type: V enturi V ertical packed bed

H orizontal packed bed T ray tower spray chamber

X O ther (specify or describe): Open spray tower.Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 9 of 20 5. Pressure mode of operation: X positive pressure negative pressure

6. Typical gas temperature: inlet ~300 °F outlet ~105 °F

7. Gas flow rate: ~4 5,000 acfm (at scrubber outlet) ~40, 000 dscfm

8. Pressure drop across scrubber : unknown inches water column (in. H 2 O)

9. Liquid to gas ratio: unknown gal / 1,000 acf

10. Chemical usage rate (specify chemical and typical usage rate , if applicable )

Chemical added Usage rate Units for usage rate

LIME

11. Identify each source served by this control device ( add rows as necessary )

.

Source ID No (s)

. Source description(s)

Potline 3 Potline 3 pots

12. Indicate what operational parameters of the control device are monitored to ensure that the

control device is operating properly :

V olumetric flow rate X F an amperage

Pressure drop X Water flow rate

O ther (specify):

.

13. What level of a monitored operati onal parameter triggers corrective action?

V olumetric flow rate (acfm) X F an amperage (amps)

P ressure drop (in. H 2 O) X W ater flow rate (gpm)

O ther (specify):

.Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 10 of 20 14. Has the collected sludge been analyzed?

_____ Yes

__ X

___ No

If yes, provide the average and range for each HAP constitue nt analyzed over the past year or last 9 samples, whichever is fewer. Alternatively, attach the results of the analyses. Do not include results from the Toxicity Characteristic Leaching Procedure (TCLP). Lab report included in attachments.

15. Additional comments and information:

Scrubber sludge is kept in a closed

- loop system.

Table 1 b Wet Scrubber Description

1. Control d evice description and ID number ( or numbers, if several identical control devices are used to control a given emission source ) : Pot fumes are routed through ESPs then wet scrubbers before being released to the atmosphere

2. Stack or vent location of each control device ( use NAD83 and include six decimal places and add rows as necessary):

ID No.: _ 10D1

_ Latitude: _ 30.566162

_____ Longitude: _

- 97.069940

______ ID No.: _ 10D2

_ Latitude: _ 30.566102

_____ Longitude: _

- 97.069915

______ ID No.: _ 10D3

_ Latitude: _ 30.565633

_____ Longitude: _

- 97.071535

______ ID No.: _ 10D4

_ Latitude: _ 30.565574

_____ Longitude: _

- 97.071508

______ ID No.: _ 10D5

_ Latitude: _ 30.565353

_____ Longitude: _

- 97.072427

______ ID No.: _ 10D6

_ Latitude: _ 30.565285

_____ Longitude: _

- 97.072395

______ ID No.: _10D7_ Latitude: _ 30.565338_____ Longitude: _

- 97.072347______

ID No.: _ 10D8

_ Latitude: _ 30.565989

_____ Longitude: _

- 97.070443

______ ID No.: _10D9_ Latitude: _ 30.565934_____ Longitude: _

- 97.070417______

3. Design collection efficiency and outlet concentration (add rows as necessary):

Pollutant Collection Outlet Source of efficiency * concentration * Estimation * (if known) (if known)

PM Percent mg/dscf

_________ PM10 Percent mg/dscf

_________ PM2.5 Percent mg/dscf

_________ Total Fluorides Percent 0. 39 mg/dscf __1______

Hydrogen Fluorides Percent 0.14 mg/dscf __1______

POM Percent mg/dscf

_________ COS Percent mg/dscf

_________Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 11 of 20 Other (specify) Percent mg/dscf

_________ Other (specify) Percent mg/dscf

_________ Other (specify) Percent mg/dscf

_________

* 1 = Performance testing 2 = Engineering judgment 3 = Manufacturer specs. 4 = Title V permit application 5 = Other (specify) _______________________

4. Device type: Venturi Vertical packed bed

Horizontal packed bed Tray tower spray chamber

X Other (specify or describe): Open spray tower.

5. Pressure mode of operation: X positive pressure negative pressure

6. Typical gas temperature: inlet ~300 °F outlet ~105 °F

7. Gas flow rate: ~4 8 ,000 acfm (at scrubber outlet)

~ 45

, 5 00 dscfm

8. Pressure drop across scrubber: unknown inches water column (in. H 2 O)

9. Liquid to gas ratio: unknown gal / 1,000 acf

10. Chemical usage rate (specify chemical and typical usage rate, if applicable)

Chemical added Usage rate Units for usage rate

LIME

11. Identify each source served by this control device (add rows as necessary).

Source ID No (s)

. Source description(s)

Potline 4 Potline 4 pots

12. Indicate what operational parameters of the control device are monitored to ensure that

the control device is operating properly :

V olumetric flow rate X F an amperage

Pressure drop X Water flow rate

O ther (specify):

.Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 12 of 20 13. What level of a monitored operati onal parameter triggers corrective action?

V olumetric flow rate (acfm) X F an amperage (amps)

P ressure drop (in. H 2 O) X Water flow rate (gpm)

O ther (specify):

.

14. Has the collected sludge been analyzed?

__ ___ Yes

__ X

___ No

If yes, provide the average and range for each HAP constituent analyzed over the past year or last 9 samples, whichever is fewer. Alternatively, attach the results of the analyses. Do not include results from the Toxicity Characteristic Leaching Procedure (TCLP). Lab report included in attachments.

15. Additional comments and informatio n:

Scrubber sludge is kept in a closed

- loop system.

Table 1 c Wet Scrubber Description

1. Control d evice description and ID number ( or numbers, if several identical control devices are used to control a given emission source ) : Pot fumes are routed through ESPs then wet scrubbers before being released to the atmosphereEnclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 13 of 20 2. Stack or vent location of each control device ( use NAD83 and include s ix decimal places and add rows as necessary):

ID No.: _ 10F1

__ Latitude: _ 30.565864

___ Longitude: _

- 97.071782

____ ID No.: _ 10F2

____ Latitude: _ 30.565913

__ Longitude: _

- 97.071849

___ ID No.: __ 10F3

____ Latitude: _ 30.565838

____ Longitude: _

- 97. 071872

____ ID No.: _ 10F4

__ Latitude: _ 30.565873

____ Longitude: __

- 97.071936

___ ID No.: __ 10F5

___ Latitude: _ 30.565806

_ ____ Longitude: _

- 97.071970

____ ID No.: _ 10F6

_____ Latitude: _ 30.565843

__ Longitude: _

- 97.072015

____ ID No.: _ 10F7

__ Latitude: _ 30.565789

_____ Longitude:

_ - 97.072207

____ ID No.: _ 10F8

__ Latitude: _ 30.565722_____ Longitude: _

- 97.072217

___ ID No.: __10F9___ Latitude: _ 30.565762

____ Longitude: _

- 97.072290

____ ID No.: _10F10_____ Latitude: __ 30.565685

___ Longitude: _

- 97.072295

___ ID No.: _10F11__ Latitude: _ 30.565724

_____ Longitude: _

- 97.072375

___ ID No.: _10F12__ Latitude: _ 30.565665

_____ Longitude: __

- 97.072397

___

3. Design collection efficiency and outlet concentration (add rows as necessary):

Pollutant Collection Outlet Source of efficiency * concentration * Estimation * (if known) (if known)

PM Percent mg/dscf

_________ PM10 Percent mg/dscf

_________ PM2.5 Per cent mg/dscf

_________ Total Fluorides Percent 0. 44 mg/dscf __1______

Hydrogen Fluorides Percent 0. 09 mg/dscf __1______

POM Percent mg/dscf

_________ COS Percent mg/dscf

_________ Other (specify) Percent mg/dscf

_________ Other (specify) Percent mg/dscf

_________ Other (specify) Percent mg/dscf

_________

* 1 = Performance testing 2 = Engineering judgment 3 = Manufacturer specs. 4 = Title V permit application 5 = Other (specify) _______________________Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 14 of 20 4. Device type: Venturi Vertical packed bed

Horizontal packed bed Tray tower spray chamber

X Other (specify or describe): Open spray tower.

5. Pressure mode of operation: X positive pressure negative pressure

6. Typical gas temperature: inlet ~300 °F outlet ~105 °F

7. Gas flow rate:

~ 32 ,000 acfm (at scrubber outlet)

~ 29,0 00 dscfm

8. Pressure drop across scrubber: unknown inches water column (in. H 2 O)

9. Liquid to gas ratio: unknown gal / 1,000 acf

10. Chemical usage rate (specify chemical and typical usage rate, if applicable)

Chemical added Usage rate Units for usage rate

LIME

11. Identify each source served by this control device (add rows as necessary).

Source ID No (s)

. Source description(s)

Potline 6 Potline 6 pots

12. Indicate what operational parameters of the control device are monitored to ensure that

the control device is operating properly :

V olumetric flow rate X F an amperage

Pressure drop X Water flow rate

O ther (specify):

.

13. What level of a monitored operati onal parameter triggers corrective action?

V olumetric flow rate (acfm) X F an amperage (amps)

P ressure drop (in. H 2 O) X Water flow rate (gpm)Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 15 of 20 O ther (specify):

.

14. Has the collected sludge been analyzed?

__ ___ Yes

__ X

___ No

If yes, provide the average and range for each HAP constituent analyzed over the past year or

last 9 samples, whichever is fewer. Alternatively, attach the results of the analyses. Do not include results from the Toxicity Characteristic Leaching Procedure (TCLP). Lab report included in attachments.

15. Additional comments and informatio n:

Scrubber sludge is kept in a closed

- loop system.Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 16 of 20 Table 2 a Combination Dry Alumina Scrubber /Bag House Description

1. Control d evice description and ID number ( or numbers, if several identical control devices are used to control a given emission source ) : Control device is a series of Alcoa 398 dry alumina scrubbers followed by an integral fabric filter baghouse 398s are very effective at fluoride removal.

2. Stack or vent location of each control device ( use NAD83 and include six decimal places and add rows as necessary):

ID No.: _ 10E1

____ Latitude: _ 30.566060

_____ Longitude: _

- 97.071440

_____ ID No.: _ 10E2

____ Latitude: _ 30.566048

_____ Longitude: _

- 97.071489

_____ ID No.: _ 10E3

____ Latitude: _ 30.566034

_____ Longitude: _

- 97.071539

_____ ID No.: _ 10E4

____ Latitude: _ 30.566018_____ Longitude: _

- 97.071589

_____ ID No.: _ 10E5

____ Latitude: _ 30.565889

_____ Longitude: _

- 97.071538

_____ ID No.: _ 10E6

____ Latitude: _ 30.565907

_____ Longitude: _

- 97.071484

_____ ID No.: _ 10E7

____ Latitude: _ 30.565921

_____ Longitude: _

- 97.071435

_____ ID No.: _ 10E8

____ Latitude: _ 30.565940

_____ Longitude: _

- 97.071385

_____ ID No.: _ 10E9

____ Latitude: _ 30.565956

_____ Longitude: _

- 97.071337

_____

3. Design collection efficiency and outlet concentration (add rows as necessary) :

Pollutant Collection Outlet Source of efficiency * concentration * Estimation * (if known) (if known)

PM Percent 648 mg /dscf

___ 2

_____ PM10 Percent mg /dscf

_________ PM2.5 Percent mg /dscf

_________ Total Fluorides Percent 0.017 mg /dscf

___ 1

_____ Hydrogen Fluorides Percent 0.007 mg /dscf

___ 1

_____ POM Percent mg /dscf

_________ COS 0 Percent mg /dscf

____ 2

____ Other (specify) Percent mg /dscf

_________ Other (specify) Percent mg /dscf

_________ Other (specify) Percent mg /dscf

_________

* 1 = Performance testing 2 = Engineering judgment 3 = Manufacturer specs. 4 = Title V permit application 5 = Other (specify) _______________________

4. Scrubber device type :

__ _ Fluidized bed

_____ Injection

__ X

___ Other (specify or describe): _ Integrated fluidized bed and baghouse

_____Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 17 of 20 5. Bag cleaning method :

__ X

__ Pulse jet

_____ Reverse air

_____ Shaker

_____ Other (describe)

_________________________________________________

6. P ressure mode of operation: X p ositive pressure n egative pressure

7. Typical gas temperature: inlet to scrubber 250 ° F outlet from bag house 200 ° F

8. Gas flow rate: 39,600 acfm (at bag house outlet) 31,700 dscfm

9. Pressure drop: Across scrubber: unknown inches water column (in. H 2 O)

Across bag house: unknown inches water column (in. H 2 O)

10. Solid to gas ratio: unknown lb / 1,000 acf

11. Alumina usage rate (differentiate between virgin and recycled alumina from potlines)

Type of Alumina Added Usage rate Units for usage rate

Virgin alumina

Recycled alumina

Other alumina (specify

_____ ___________)

12. Identify each emission source served by this control device (add rows as necessary).

Source ID No(s). Description(s)

Potline 5 Potline 5

13. Indicate what operational parameters of the control device are monitored to ensure that the

control device is operating properly :

V olumetric flow rate X F an amperage

P ressure drop X Visible emissions opacity

O ther (specify):

.

14. What level of a monitored operati onal parameter triggers corrective action ?

V olumetric flow rate (acfm) X F an amperage (amps)

P ressure drop (in. H 2 O) X Visible emissions opacity (%)Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 18 of 20 O ther (specify):

.

15. Additional comments and information:

Table 2b Combination Dry Alumina Scrubber/Bag House Description

1. Control d evice description and ID number ( or numbers, if several identical control devices are used to control a given emission source ) : Control device is a series of Alcoa 398 dry alumina scrubbers followed by an integral fabric filter baghouse 398s are very effective at fluoride removal.

2. Stack or vent location of each control device ( use NAD83 and include six decimal places and add rows as necessary):

Potline 7

ID No.: _ 10G1

____ Latitude: _30.568259____ Longitude: _

- 97.071573____
ID No.: _ 10G2

____ Latitude: _ 30.568283

_____ Longitude:

_ - 97.071525

_____ ID No.: _ 10G3

____ Latitude: _ 30.568298_____ Longitude: _

- 97.071479_____
ID No.: _10G 4

____ Latitude: _ 30.568313_____ Longitude: _

- 97.071429_____
ID No.: _ 10G5

____ Latitude: _ 30.568335_____ Longitude: _

- 97.071380_____

ID No.: _ 10G6

____ Latitude: _ 30.568353_____ Longitude: _

- 97.071321_____
ID No.: _ 10G7

____ Latitude: _ 30.567939

_____ Longitude: _

- 97.072576

_____ ID No.: _ 10G8

____ Latitude: _ 30.567924

_____ Longitude: _

- 97.072628

_____ ID No.: _ 10G9

____ Latitude:

_ 30.567908

_____ Longitude: _

- 97.072680

_____ ID No.: _ 10G10

____ Latitude: _ 30.567888

_____ Longitude: _

- 97.072731

_____ ID No.: _10G11____ Latitude: _ 30.567872

_____ Longitude: _

- 97.072777

_____ ID No.: _10G12____ Latitude: _ 30.567858

_____ Lon gitude: _

- 97.072824

_____

Potline 8
ID No.: _10H1____ Latitude: _ 30.568905

_____ Longitude : _

- 97.071842

_____ ID No.: _10H2____ Latitude: _ 30. 568922

_____ Longitude : _

- 97. 071791

_____ ID No.: _10H3____ Latitude: _ 30.568944

_____ Longitude : _

- 97.071745

_____ ID No.: _10H4____ Latitude: _ 30.568958

_____ Longitude : _

- 97.071692

_____ ID No.: _10H5____ Latitude: _ 30.568972

_____ Longitude : _

- 97.071644

_____ ID No.: _10H6____ Latitude: _ 30.568993

____ Longitude : _

- 97.071594

____ ID No.: _10H7____ Latitude: _ 30.568578

_____ Longitude : _

- 97.072850

_____ ID No.: _10H8____ Latitude: _ 30.568563

_____ Longitude : _

- 97.072895

_____ ID No.: _10H9____ Latitude: _ 30.568550

_____ Longitude : _

- 97.072946

_____ ID No.: _10H10____ Latitude: _ 30.568533

_____ Longitude : _

- 97.072994

_____ ID No.: _10H11____ Latitude: _ 30.568515

_____ Longitude : _

- 97.073041

_____ ID No.: _10H12____ Latitude: _ 30.568498

_____ Longitude : _

- 97.073088

_____Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 19 of 20 3. Design collection efficiency and outlet concentration (add rows as necessary) :

Pollutant Collection Outlet Source of efficiency * concentration * Estimation * (if known) (if known)

PM Percent 648 mg /dscf ___2_____

PM10 Percent mg /dscf

_________ PM2.5 Percent mg /dscf

_________ Total Fluorides Percent 0.04 mg /dscf ___1_____

Hydrogen Fluorides Percent 0.02 mg /dscf ___1_____

POM Percent mg /dscf

_________ COS 0 Percent mg /dscf ____2____

Other (specify) Percent mg /dscf

_________ Other (specify) Percent mg /dscf

_________ Other (specify) Percent mg /dscf

_________

* 1 = Performance testing 2 = Engineering judgment 3 = Manufacturer specs. 4 = Title V permit application 5 = Other (specify) _______________________

4. Scrubber device type:

__ _ Fluidized bed

_____ Injection

__X___ Other (specify or describe): _Integrated fluidized bed and baghouse_____

5. Bag cleaning method :

__X__ Pulse jet

_____ Reverse air

_____ Shaker

_____ Other (describe)

_________________________________________________

6. P ressure mode of operation: X p ositive pressure n egative pressure

7. Typical gas temperature: inlet to scrubber 250 ° F outlet from bag house 200 ° F

8. Gas flow rate: 39,600 acfm (at bag house outlet) 31,700 dscfm

9. Pressure dr op: Across scrubber: unknown inches water column (in. H 2 O)

Across bag house: unknown inches water column (in. H 2 O)

10. Solid to gas ratio: lb / 1,000 acf

11. Alumina usage rate (differentiate between virgin and recycled alumina from potlines)

Type of Alumina Added Usage rate Units for usage rateEnclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 20 of 20 Virgin alumina

Recycled alumina

Other alumina (specify ________________)

12. Identify each emission source served by this control device (add rows as necessary).

Source ID No(s). Description(s)

Potl ine 7

Potline 8 Potline 7

Potline 8

13. Indicate what operational parameters of the control device are monitored to ensure that the

control device is operating properly :

V olumetric flow rate X F an amperage

P ressure drop X Visible emissions opacity

O ther (specify):

.

14. What level of a monitored operati onal parameter triggers corrective action ?

V olumetric flow rate (acfm) X F an amperage (amps)

P ressure drop (in. H 2 O) X Visible emissions opacity (%)

O ther (specify):

.

15. Additional comments and information:Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 21 of 20 T able 3 Electrostatic Precipitator (ESP) Description

1. Control d evice description and ID number ( or numbers, if several identical control devices

are used to control a given emission source ) :

ESPs are used upstream of six of the eight wet scrubbers in Potline 3 and upstream from all the Potline 6 wet scrubbers. These are shown in the file “Control_Equipment_Diagrams.pdf” submitted with this document. No lats or longs are being shown below as these vent through

the wet scrubbers identified in the Table 1a and 1c above.

2. Stack or vent location of each control device ( use NAD83 and include six decimal places and add rows as necessary) :

ID No.: _________ Latitude: _____

__________ Longitude: ________________

ID No.: _________ Latitude: _______________ Longitude: ________________

ID No.: _________ Latitude: _______________ Longitude: ________________

3. Design collection efficiency and outlet concentration (add rows as necessary) :

Pollutant Collection Outlet Source of efficiency * concentration * Estimation * (if known) (if known)

PM Percent mg /dscf

_________ PM10 Percent mg /dscf

_________ PM2.5 Percent mg /dscf

_________ Total Fluorides Percent mg /dscf

_________ Hydrogen Fluorides Percent mg /dscf

_________ POM Percent mg /dscf

_________ COS Percent mg /dscf

_________ Other (specify) Percent mg /dscf

_________ Other (specify) Percent mg /dscf

_________ Other (specify) Percent mg /dscf

_________

* 1 = Performance testing 2 = Engineering judgment 3 = Manufacturer specs. 4 = Title V permit application 5 = Other (specify) _______________________

4. D evice type: H igh

- voltage, single

- stage L ow

- voltage, two

- stage

W et D ry

X O ther (specify or describe): The primary voltage which feeds the ESP’s is single phase 480 volts. The secondary voltage is DC and the

t arget voltage was 40,000 volts

. P rimary voltage and secondary current

was monitored for MACT reporting.Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 22 of 20 5. P ressure mode of operation: p ositive pressure n egative pressure

6. Typical gas temperature: inlet ° F outlet ° F

7. Gas flow rate: acfm (at ESP outlet) dscfm

8. Collection plate surface area: __________ ft 2

9. Secondary power : _____________ k W

10. Identify each emission source served by this control device (add rows as necessary).

Source ID No(s). Description

11. Indicate what operational parameters of the control device are monitored to ensure that the

control device is operating properly :

Visible emissions V olumetric flow F an amperage opacity rate

Secondary power Secondary voltage

O ther (specify):

.

12. What level of a monitored operational parameter triggers corrective action?

Visible emissions V olumetric flow F an amperage opacity (%) rate (acfm) (amps)

Secondary power Secondary voltage ( kW ) (volts)

O ther (specify):

.

13. Has the collected dust been analyzed?

_____ Yes

_____ No

If yes, provide the average and range for each HAP constituent analyzed over the past year or the last 9 samples, whichever is fewer. Alternatively, attach the results of the analyses. Do not include results from the Toxicity Characteristic Leaching Procedure (TCLP).

14. Additi onal comments and information:Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 23 of 20Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 24 of 20 Table 4 Bag House Description ( Only fill out Table 4 for bag houses that are not associated with a dry alumina scrubber. Do not fill out Table 2 and Table 4 for any one bag house

. )

1. Control d evice description and ID number ( or numbers, if several identical control devices are used to control a given emission source ) : 1 baghouse is in operation on Potline 3 prior to the wet scrubber and upstream from all the

wet scrubbers in Potline 4. VE readings and stack testing are associated with the exit of the

wet scrubbers.

2. Stack or vent location of each control device ( use NAD83 and include six decimal places and add rows as necessary) :

ID No.: _________ Latitude: _______________ Longitude: ________________

ID No.: _________ Latitude: _______________ Longitude:

________________ ID No.: _________ Latitude: _______________ Longitude: ________________

3. Design collection efficiency and outlet concentration (add rows as necessary) :

Pollutant Collection Outlet Source of efficiency * concentration * Estimation * (if known) (if known)

PM Percent mg /dscf

_________ PM10 Percent mg /dscf

_________ PM2.5 Percent mg /dscf

_________ Total Fluorides Percent mg /dscf

_________ Hydrogen Fluorides Percent mg /dscf

_________ POM Percent mg /dscf

_________ COS Percent mg /dscf

_________ Other (specify) Percent mg /dscf

_________ Other (specify) Percent mg /dscf

_________ Other (specify) Percent mg /dscf

_________

* 1 = Performance testing 2 = Engineering judgment 3 = Manufacturer specs. 4 = Title V p ermit application 5 = Other (specify) _______________________

4. Bag cleaning method:

__ X

__ Pulse jet

_____ Reverse air

_____ Shaker

_____ Other (describe)

_________________________________________________

5. P ressure mode of operation: X p ositive pressure n egative pressure

6. Typical gas temperature: inlet 250 ° F outlet 200 ° FEnclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 25 of 20 7. Gas flow rate: ~90,000 acfm (at bag house outlet) ~70,000 dscfm

8. Pressure drop: unknown inches water column (in. H 2 O)

9. Air to cloth ratio: cfm/sf or fpm

10. Identify each emission source served by this device (add rows as necessary).

Source ID No(s). Description(s)

Part of Potline 3 and Potline 4

control trains

11. Indicate what operational parameters of the control device are monitored to ensure that the

control device is operating properly :

_______ V olumetric flow rate

____________ F an amperage

_______ Visible emissions opacity

____________ P ressure drop

O ther (specify):

.

12. What level of a monitored operati onal parameter triggers corrective action?

_______ V olumetric flow rate (acfm)

____________ F an amperage (amps)

_______ Visible emissions opacity (%)

____________ P ressure drop (in. H 2 O)

O ther (specify):

.

13. Has the collected dust been analyzed?

_____ Yes

__ X

__ No

If yes, provide the average and range for each HAP constituent analyzed over the past year or last 9 samples, whichever is fewer. Alternatively, attach the results of the analyses. Do not include results from the Toxicity Chara cteristic Leaching Procedure (TCLP).

14. Additional comments and information:

Please refer to Table 1 for wet scrubbers as that is the location for VE readings and stack testing. These are upstream from those controls and emission points.Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 26 of 20 Table 5 Other Air Pollution Control Devices

1. Control d evice description and ID number ( or numbers, if several identical control devices are used to control a given emission source ) :

2. Stack or vent location of each control device ( use NAD83 and include six decimal places and add rows as necessary) :

ID No.: _________ Latitude: _______________ Longitude: ________________

ID No.: _________ Latitude: _______________ Longitude: ________________

ID No.: _________ Latitude: _______________ Longitude:

________________

3. Design collection efficiency and outlet concentration (add rows as necessary) :

Pollutant Collection Outlet Source of efficiency * concentration * Estimation * (if known) (if known)

PM Percent mg /dscf

_________ PM10 Percent mg /dscf

_________ PM2.5 Percent mg /dscf

_________ Total Fluorides Percent mg /dscf

_________ Hydrogen Fluorides Percent mg /dscf

_________ POM Percent mg /dscf

_________ COS Percent mg /dscf

_________ Other (specify) Percent mg /dscf

_________ Other (specify) Percent mg /dscf

_________ Other (specify) Percent mg /dscf

_________

* 1 = Performance testing 2 = Engineering judgment 3 = Manufacturer specs. 4 = Title V permit application 5 = Other (specify) _______________________

4. P ressure mode of operation: p ositive pressure n egative pressure

5. Typical gas temperature: inlet ° F outlet ° F

6. Gas flow rate: acfm Specify location:

_______________________________ D scfm

7. Identify each emission source served by this control device ( add rows as necessary ).

Source ID No(s). Source description(s)Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 27 of 20 8. Indicate what operational parameters of the control device are monitored to ensure that the

control device is operating properly :

Visible emissions opacity V olumetric flow rate

P ressure drop

O ther (specify):

.

9. What level of a monitored operati onal parameter triggers corrective action ?

Visible emissions opacity (%) V olumetric flow rate (acfm)

Pressure drop (in. H 2 O)

O ther (specify):

.

10. Has the collected dust or sludge been analyzed?

_____ Yes

_____ No

______ Not Applicable

If yes, provide the average and range for each HAP constituent analyzed over the past year or last 9 samples, whichever is fewer. Alternatively, attach the results of the analyses. Do not include results from the Toxicity Characteristic Leaching Procedure (TCLP).

11. Additi onal comments and information:Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 28 of 20 PART C: START

- UPS AND SHUTDOWNS

Please provide the information in Table 6 and questions below for each Subpart LL p otline during start

- up (the commencement of operation for any purpose) and shutdown (the cessation of operation for any purpose) operatio ns. For the purposes of Part C of Enclosure 1 start

- up and shutdown refers to the commencement and cessation of operations of a potline, not of an individual pot (e.g. after anode changes).

1 6

. Please provide a rationale, if applicable, for why application of the Subpart LL standards to

a potline during start

- up or shutdown is not practica b l e economically or technologically

n ot practicable economically: Not practicable economically: EPA Reference Methods 14

an d 14A are designed to measure TF roof emissions over only a subset of the smelting pots

operating in a pot room (roughly 10 or 12 pots out of 130 or 150), with the assumption that

the pots being sampled represent the entire potline during steady

- state oper ation. During

potline startup, pots located under a Method 14 or 14A sampling system do not represent

the entire potline because pots throughout the room are in various stages of startup or non

steady

- state operation. So, it is not technically practicabl e to either establish a standard for

startup or show compliance with a startup standard using the available EPA Reference

Method. Establishing a standard for startups is further complicated by the fact that startups

are rare and the conditions of a startu p (and associated emissions) will vary depending on

whether a potline was shut down by an emergency power loss (e.g., an ice storm) or

whether the potline was intentionally shut down in a controlled manner. Work practice

standards are the only practicable means of regulating emissions during an aluminum

potline startup.

Collecting Method 14 or 14A samples representative of an the entire potline is not

economically practicable because this would require the installation and operation of 12 or

13 separate Reference Method sampling systems in each potroom to collect representative

compliance samples. These sampling systems typically cost more than $250,000 each to

install and this level of expenditure is not practicable for the rare occasion of startup at an

individual potline. Additionally, a large team of staff or contract resources necessary to

collect the required 48

- hours three sampling runs.

Not practicable technologically: _______________________________________________Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 29 of 20 ____________________________ _____________________________________________

____________________ _____________________________________________________

_________________________________________________________________________

1 7

. Do you have test data that show any potline hazardous air po llutant (HAP) emissions during a start

- up or shutdown? (Check one)  Y  N

If yes:

a. Provide a copy of the test data.

b. Describe the operating conditions (e.g. tons of aluminum produced per day) at the time

of the testing.

______________________________________________________________________

_________________________ _____________________________________________

_________________________ _____________________________________________

1 8

. Do you have an operating plan to minimize emissions during start

- up and/or shutdown (e.g. a SS Plan) ? ( CHECK one)

_____ X _____ Yes

____________ No

If “Yes,” please provide a copy of the operating plan

. See file “Potline_SSM_Plan.pdf”

19

. Please indicate below how often you perform the following activities during start

- up of your potlines by adding the following codes: A, S, N for A lways, S ometimes, or N ever.

__ A

__ a. Develop a potroom/potline start

- up schedule before start

- up

__ A

__ b

. Perform daily assessment of start

- up pro gress and any schedule changes

__ A

__ c

. Keep records of number of pots started per day

__ A

__ d

. Bring potroom/potline scrubbers and exhaust fans on line prior to energi zing

first cell to be restarted

__ N

__ e

. Supply alumina at a higher rate t han during normal pot operation

If s o, how much higher? ____________(percent)

__ A

__ f

. Keep pots covered during start

- up

__ A

__ g

. Limit removal of covers or panels to pots being worked on

__ A

__ h

. Keep primary capture/control system operating at all times during the start

- up

__ A

__ i. Monitor pot lines frequently during start

- up to identify sick or unstable pots

If so, do you u se the following methods to manage a “sick” or unstable pot

__ N

__ Adjust exhaust flow from pots

__ S

__ Adjust cell voltage and feeding levels

__ S

__ Monitor and adjust ano de current and liquid level

_____ Other corrective procedures. Please describe the corrective procedures applie d (use additional pages if needed):Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 30 of 20 _______________________________________________________

_______________________________________________________

_______________________________________________________

_______________________________________________________

____________________________________ ___________________

2 0

. Please list any additional start

- up activities in the space below.

____ ____________________________________________________________________

________________________________________________________________________

___________________ _____________________________________________________

______ ____________________________________ ______________________________Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 31 of 20 Table 6 D escription of most recent potline start

- up and shutdown of each potline (Make additional copies this table as needed)

Potline ID

(as assigned in

the schematic of question 7) Date(s), duration, and d escription

(e.g. planned shutdown for ..., or emergency shutdown due to ...) of

start

- up or shutdown Was the start

- up or shutdown covered by a contingency plan for controlling emissions? (Y/N) What actions were taken to minimize emissions?

Potline 3 June 19, 2008 Start

June 21, 2008 End (48 hrs)

Planned Shutdown Followed SSM Plan Followed SSM Plan which was submitted along with this questionnaire. It provides details that are best read directly from the plan.

Potline 4 June 19, 2008

June 21, 2008 End (48 hrs)

Planned Shutdown “ “ “ “ “ “ “ “

Potline 5 June 19, 2008

June 21, 2008 End (48 hrs)

Planned Shutdown “ “ “ “ “ “ “ “

Potline 6 October 3, 2008 Start

October 5, 2008 End (48 hrs)

Planned Shutdown “ “ “ “ “ “ “ “

Potline 8 October 17, 2008 Start

October 19, 2008 End (48 hrs)

Planned Shutdown “ “ “ “ “ “ “ “Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 32 of 20 Potline 7 November 7, 2008 Start

November 9, 2008 End (48 hrs)

Planned Shutdown “ “ “ “ “ “ “ “Enclosure 1

Primary Aluminum Reduction Section 114 Enclosure 1

- April 22 , 2011 Page 33 of 20 PART D : PREVIOUSLY PERFORMED TESTING AND TEST REPORT DATA

2 1

. Submit emission test report result s for calendar year 2010 for polycyclic organic matter (POM ) and total fluorides (TF) for any sources that have POM and/or TF emissions standards under Subpart LL. If available, s ubmit emission test report result s for any testing

conducte d from January 1, 2006 to the present for metal HAP (i.e. antimony, arsenic, beryllium, cadmium, chromium, hexavalent chromium, cobalt, lead, manganese, nickel, and selenium), TF

, hydrogen fluoride (HF), particulate matter (PM), POM, speciated organic HAP data, and/or carbonyl sulfide (COS) for primary aluminum sources that currently do not have emission standards for those pollutants under Subpart LL

.

W e would prefer electronic copies of these reports, if available . If electronic copies of the

test report s are not available, hard copies may be provided or test result summaries may be provided. The following details (at a minimum) must be included , if available :

(a) P ollutants and emission rates measured (e.g., lb/hr, gr/dscf, lb/ton),

(b) T he names of the test methods or procedures used,

( c ) I nformation on actual production or pr ocessing rates during the test,

( d ) For COS emission tests, the sulfur content of the coke and pitch used in the anodes at the time the testing was conducted

, and

(e) A statement that the process and any control devices were operating normally during the test, or if not, identify any abnormal or unrepresentative conditions.

2 2

. If emission controls were installed or upgraded for primary aluminum sources after October 7, 1997 to control emissions of POM from prebake potlines, emissions of POM from existing pitch storage tanks, and/or emissions of COS , please also include test reports

, if available, including the information specified in 2 1 (a) through ( e ), for the most recent emission testing that was performed before these controls were installed or upgraded and identify th em as “pre

- MACT test reports.”

2 3

. Has any air monitoring , such as Fourier Transform Infrared (FTIR) s pectroscopy

, been performed at your facility to measure COS concentration and/or emission s of sulfur

oxides ? If so, please provide the most recent data for a normal operating time period

. Please include a description of the locations of sampling (reference the schemat ic submitted in response to question 7) , sampling technique, duration of sampling, production rate during sampling, and potroom operations performed during the sampling.

2 4

. Has any air monitoring , such as FTIR s pectroscopy, been performed at your facilit y to

measure emission s of HF at the same time that TF samples were collected from the roof

monitor ? If so, please provide the most recent data for a normal operating time period. Please include a description of the locations of sampling (reference the schematic submitted in response to question 7), sampling technique, duration of sampling, production rate during sampling, and potroom operations performed during the sampling.Enclosure 2

Primary Aluminum Reduction Section 114 Enclosure 2

- April 22 , 2011 Page 1 of 3 Test Procedures, Methods, and Reporting Requiremen ts for the Information Collection

Request for the Primary Aluminum Reduction Source Category

This document provides an overview of approved methods, target pollutant s and units of measure, and reporting requirements for the primary aluminum reduction source category. See

Enclosure 3 for details about EPA‟s authority under the Clean Air Act (CAA) section 114 (42

U.S.C. 741 4 ) to request source emission test data. All recipients must complete and submit test

results by May 31 , 2011

. This document will be referred to as the „primary aluminum reduction test program.‟ The do cument is organized as follows:

1.0 Sampling and Chemical Analysis Procedures and Methods for M etallic HAP (including speciated hexavalent chromium)

2.0 How to Report Data

3.0 How to Submit Data

4.0 Co ntact Information for Questions on Test Plan and Reporting

1.0 Sampling and Chemical Analysis Procedures and Methods for Metallic HAP (including speciated hexavalent chromium)

1 .1 Sampling

- Bag House and Electrostatic Precipitator (ESP) Particulate Matter

Sample and analyze representative particulate matter (e.g. in the hoppers) collected by each of the bag houses or ESP used to control particulate matter emissions from primary aluminum potlines

. In cases where solids from different compa rtments of a single bag

house or ESP are collected in multiple hoppers or multiple collection sacks, a single composite sample will be adequate. Also, if multiple potlines of the same type (e.g. HSS, SWPB, CWPB1, etc.) are supplied with alumina from the s ame alumina storage vessel, sampling of representative particulate matter from the bag house or ESP associated with one of those potlines will be adequate

. Sampling should be conducted once per day for five consecutive operating days with a clean uncontami nated scoop or similar apparatus

. A ll samples collected should be the approximately the same weight and stored in a clean

air

- tight container.

Guidance on sample collection can be found in of Chapter 4 of the document Superfund Program Representative Sampl ing Guidance, Volume 1: Soil (EPA 540/R

- 95/141), which is available through the following link:

http://www.epa.gov/tio/download/char/sf_rep_samp_guid_soil.pdf

1

. 2 Sampling

– Wet Scrubber Sludge , Injected Slurry (if applicable), and Discharge Water

Sample and analyze a representative grab sample of the scrubber sludge , injected slurry (if applicable)

, and any aqueous blowdown stream discharged from the wet scrubber. If a separate stream of scrubber blowdown is discharged from the scrubber, collect a representative grab sample of this stream. Also, if multiple potlines of the same type (e.g. HSS, SWPB, CWPB1, etc.) are supplied with alumina from the same alumina storage vessel, sampling of representative scrubber sludge, injected slurry (if applicable) , and any aqueous blowdown stream from the wet scrubber associated with one of those potlines will be adequate

. Sampling should be conducted once per day for five consecutiveEnclosure 2

Primary Aluminum Reduction Section 114 Enclosure 2

- April 22 , 2011 Page 2 of 3 operating days. All samples collected should be the approximately the same weight or volume and stored in a clean container.

1.3 Chemical Analysis

Analyze each sample of bag house or electrostatic precipitator particulate matter

, scrubber sludge , injected slurry (if any), and scrubber blowdown (if any) for individual

HAP metals as listed in Table 1 .1. Also analyze each sample for hexavalent chromium

. Methods for chemical analysis are given in Table 1 .2.

Table 1.1 HAP Metals

Antimony Arsenic Beryllium

Cadmium Chromium Hexavalent Chromium

Cobalt Lead Manganese

Nickel Selenium

Table 1 .2 Methods for Analysis of Samples

Analyte Procedure

HAP metals listed

in Table 1 .1 EPA Method 3051A digestion followed by ICP

- MS

as detailed in EPA Method 6020

Hexavalent

chromium EPA Method 3060A and EPA Method 218.6:

Extraction and Cr +6 Ion Chromatography

2.0 How to Report Data

2

. 1 Reporting Bag House or Electrostatic Precipitator Particulate Matter

, Wet Scrubber Sludge, Injected Slurry, and Discharge Water Chemical Analyses

You must report the results of the chemical analyses of your bag house or electrostatic precipitator particulate matter and wet scrubber sludge, injected slurry, and discharge

water in a Microsoft ® Excel Template which is provided

. If more than one sample is analyzed, y ou must make a copy of the worksheet and update the source ID in order to distinguish between each analysis of particulate matter collected from each selected bag house. After completing the worksheet, you must also submit an electronic copy of the chemical analysis report (PDF format preferred).

2.2 Calculating and Reporting Values Measured Below Method Detection Levels

See Appendix C

– Guidance for calculating and reporting measurements less than detection levels for emissions data collection (ICR) programs

.Enclosure 2

Primary Aluminum Reduction Section 114 Enclosure 2

- April 22 , 2011 Page 3 of 3 3.0 How to Submit Data

Use one of three transmittal methods listed below. In order to avoid duplicate data and keep all

data for a particular facility together, we request that you submit all of the data requested from your company in the same way. To submit your data:

E

- mail an electronic copy of all requested files to primaryicr@epa.gov

.

If the files are too large for your e

- mail system, you may upload the electronic files to a FTP site; if you would like to use this option, send an email to bahner@rti.org for

instructions on how to access the site.

Mail a CD or DVD containing an electro nic copy of all requested files to the EPA address shown in your Section 114 letter.

If you are submitting CBI, you must mail a separate CD or DVD containing only the CBI portion of your data to the EPA address shown in your Section 114 letter.

4 .0 Contact Information for Questions on Test Plan and Reporting

For questions on the primary aluminum source category , contact:

David Putney (U.S. EPA) (919) 541

- 2016 putney.david@epa.gov

OR

Rochelle Boyd (U.S. EPA) (919) 541

- 1390 boyd.rochelle@epa.gov

For questions on the test methods contact:

Gerri Garwood (U.S. EPA) (919) 541

- 2406 garwood.gerri@epa.gov

OR

Raymond Merrill (U.S. EPA) (919) 541

- 5225 merrill.raymond@epa.gov

For questions on uploading files to the FTP site, contact:

Mark Bahner (RTI, International) (919) 541

- 6016 bahner@rti.orgAPPENDIX A

Primary Aluminum Reduction Section 114 Appendix A

- April 2 2 , 2011 Page 1 of 3 Abbreviations

, Acronyms , and Unit Conversions

acf actual cubic feet

acfm actual cubic feet per minute

acm actual cubic meters

acmm actual cubic meters per minute

ADL above detection level

APC air pollution control

ASTM American Society for Testing and Materials

atm atmospheres (unit of pressure)

BDL below detection level

Btu/hr British thermal units per hour

Btu/scf British thermal units per stand ard cubic foot

CAA Clean Air Act

CARB California Air Resources Board

CBI confidential business information

CEMS continuous emission monitoring system

CFR Code of Federal Regulations

CO carbon monoxide

COS carbonyl sulfide

Cr chromium

CS 2 carbon disulfide

CTM Conditional Test Method day/yr days per year

°C degrees Celsius

° F degrees Fahrenheit

D/F dioxins and furans

DLL detection level limited

dscf dry standard cubic feet

dscfm dry standard cubic feet per minute

dscm dry standard cubic meters

dscmm dry sta ndard cubic meters per minute

EPA U.S. Environmental Protection Agency

ERT Electronic Reporting Tool

E SP electrostatic precipitator

ft foot or feet

ft 2 square feet

ft 3 cubic feet fpm feet per minute (acfm divided by ft 2 of filter area) fps feet per second gal gallon

gpm U.S. gallons per minute gr/dscf grains per dry standard cubic foot

g gram HAP hazardous air pollutants

HCl hydrogen chloride

HCN hydrogen cyanide

HF hydrogen fluorideAPPENDIX A

Primary Aluminum Reduction Section 114 Appendix A

- April 2 2 , 2011 Page 2 of 3 Hg mercury hr hour or hours hr/day hours per day

ICR information collection request

in inch or inches

in

. H 2 O inches of water (pressure drop) kg kilogram

kPa kilopascals

kv kilovolt

kw

- hr kilowatt hour

lb pound lb/day pounds per day lb/gal pounds per U.S. gallon

lb/hr pounds per hour

lb/ton pounds per ton

m meter

m 3 cubic meters

MACT maximum achievable control technology

min minute or minutes Mg megagram

mg milligram mg/kg milligram per kilogram mg/l milligrams per liter

MM btu/hr millions of British thermal units per hour

MM scf millions of standard cubic feet

MM lb/ yr million pounds per year μg/m 3 microgram per cubic meter

μm micrometer

NAICS North American Industry Classification System

NaOH sodium hydroxide

NESHAP National Emission Standards for Hazardous Air Pollutants

NO

x nitrogen oxides OAQPS Office of Air Quality Planning and Standards

OTM Other Test Method

PAH polynuclear aromatic hydrocarbon

PAL primary aluminum reduction facility pdf Image file format produced with Adobe© or similar software

PM particulate matter

PM 10 particulate matter that is 10 micrometers or less in diameter

PM 2.5 particulate matter that is 2.5 micrometers or less in diameter

POM polycyclic organic matter

ppmv parts per million by volume

ppmw parts per million by weight

RATA Relative Accuracy Test Audit

% percent

s second or se conds

scf standard cubic feet

scf/hr standard cubic feet per hourAPPENDIX A

Primary Aluminum Reduction Section 114 Appendix A

- April 2 2 , 2011 Page 3 of 3 scfm standard cubic feet per minute

scm standard cubic meters

SO 2 sulfur dioxide

SPPD Sector Policies and Programs Division

SS start

- up or shutdown

TCLP toxicity characteristic leaching procedure

TF total fluorides

THC total hydrocarbons tpd tons (short) per day tph tons (short) per hour

tpy tons (short) per year TSP total suspended particulate

vol% volume percent, or percent by volume

wt% weight percent, or percent by weight

yr year

To convert from To Multiply by

°C °F m ultiply by 1.8 , then add 32

°F °C subtract 32, then multiply by 0.556

ft m 0. 3 048

ft/min m/min 0. 3 048

ft 2 m 2 0.0929

ft 3 m 3 0.028

g lb 0.0022 g/m 3 lb/ft 3 0.0000624

gr lb 0.000143 gr/dscf mg/dscm 2,290

in

. H 2 O mm H 2 O 25.4

k g/hr lb/hr 2.205

lb g 454

lb gr 7000

lb/ft 3 g /m 3 16,000

lb/hr k g/hr 0.454

m ft 3.28

m/min ft/min 3.28

mm H 2 O in H 2 O 0.0394

m 2 ft 2 10.76 mg/dscm gr/dscf 0.00044

m 3 ft 3 35.31
Mg ton 1.1

ton (short) M g 0.907APPENDIX B

Primary Aluminum Reduction Section 114 Appendix B

- April 2 2 , 2011 Page 1 of 5 

### List of Hazardous Air Pollutants (HAP )

CAS

Number Chemical Name

Antimony Compounds Arsenic Compoun ds (inorganic including arsine) Beryllium Compounds Cadmium Compounds Chromium Compounds Cobalt Compounds

Coke Oven Emissions Cyanide Compounds 1

Glycol ethers 2

Lead Compounds Manganese Compounds Mercury Compounds

Fine mineral fibers 3

Nickel Compounds Polycylic Organic Matter 4 ( Report individual polycyclic aromatic hydrocarbons by CAS number). Radionuclides (including radon) 5

Selenium Compounds

75

- 07

- 0 Acetaldehyde

60

- 35

- 5 Acetamide

75

- 05

- 8 Acetonitrile

98

- 86

- 2 Acetophenone

53

- 96

- 3 2

- Acetylaminofluorene

107

- 02

- 8 Acrolein

79

- 06

- 1 Acrylamide

79

- 10

- 7 Acrylic acid

107

- 13

- 1 Acrylonitrile

107

- 05

- 1 Allyl chloride

92

- 67

- 1 4

- Aminobiphenyl

62

- 53

- 3 Aniline

90

- 04

- 0 o

- Anisidine

1332

- 21

- 4 Asbestos

71

- 43

- 2 Benzene (including benzene from gasoline)

92

- 87

- 5 Benzidine

98

- 07

- 7 Benzotrichloride

100

- 44

- 7 Benzyl chloride

92

- 52

- 4 Biphenyl

117

- 81

- 7 Bis(2

- ethylhexyl)phthalate (DEHP)

542

- 88

- 1 Bis(chloromethyl)ether

75

- 25

- 2 Bromoform

106

- 99

- 0 1,3

- Butadiene

156

- 62

- 7 Calcium cyanamideAPPENDIX B

Primary Aluminum Reduction Section 114 Appendix B

- April 2 2 , 2011 Page 2 of 5 CAS

Number Chemical Name

133

- 06

- 2 Captan

63

- 25

- 2 Carbaryl

75

- 15

- 0 Carbon disulfide

56

- 23

- 5 Carbon tetrachloride

463

- 58

- 1 Carbonyl sulfide

120

- 80

- 9 Catechol

133

- 90

- 4 Chloramben

57

- 74

- 9 Chlordane

7782

- 50

- 5 Chlorine

79

- 11

- 8 Chloroacetic acid

532

- 27

- 4 2

- Chloroacetophenone

108

- 90

- 7 Chlorobenzene

510

- 15

- 6 Chlorobenzilate

67

- 66

- 3 Chloroform

107

- 30

- 2 Chloromethyl methyl ether

126

- 99

- 8 Chloroprene

1319

- 77

- 3 Cresols/Cresylic acid (isomers and mixture)

95

- 48

- 7 o

- Cresol

108

- 39

- 4 m

- Cresol

106

- 44

- 5 p

- Cresol

98

- 82

- 8 Cumene

94

- 75

- 7 2,4

- D, salts and esters

3547

- 04

- 4 DDE

334

- 88

- 3 Diazomethane

132

- 64

- 9 Dibenzofurans

96

- 12

- 8 1,2

- Dibromo

- 3

- chloropropane

84

- 74

- 2 Dibutylphthalate

106

- 46

- 7 1,4

- Dichlorobenzene(p)

91

- 94

- 1 3,3

- Dichlorobenzidene

111

- 44

- 4 Dichloroethyl ether (Bis(2

- chloroethyl)ether)

542

- 75

- 6 1,3

- Dichloropropene

62

- 73

- 7 Dichlorvos

111

- 42

- 2 Diethanolamine

121

- 69

- 7 N,N

- Diethyl aniline (N,N

- Dimethylaniline)

64

- 67

- 5 Diethyl sulfate

119

- 90

- 4 3,3

- Dimethoxybenzidine

60

- 11

- 7 Dimethyl aminoazobenzene

119

- 93

- 7 3,3'

- Dimethyl benzidine

79

- 44

- 7 Dimethyl carbamoyl chloride

68

- 12

- 2 Dimethyl formamide

57

- 14

- 7 1,1

- Dimethyl hydrazine

131

- 11

- 3 Dimethyl phthalate

77

- 78

- 1 Dimethyl sulfate

534

- 52

- 1 4,6

- Dinitro

- o

- cresol, and saltsAPPENDIX B

Primary Aluminum Reduction Section 114 Appendix B

- April 2 2 , 2011 Page 3 of 5 CAS

Number Chemical Name

51

- 28

- 5 2,4

- Dinitrophenol

121

- 14

- 2 2,4

- Dinitrotoluene

123

- 91

- 1 1,4

- Dioxane (1,4

- Diethyleneoxide)

122

- 66

- 7 1,2

- Diphenylhydrazine

106

- 89

- 8 Epichlorohydrin (l

- Chloro

- 2,3

- epoxypropane)

106

- 88

- 7 1,2

- Epoxybutane

140

- 88

- 5 Ethyl acrylate

100

- 41

- 4 Ethyl benzene

51

- 79

- 6 Ethyl carbamate (Urethane)

75

- 00

- 3 Ethyl chloride (Chloroethane)

106

- 93

- 4 Ethylene dibromide (Dibromoethane)

107

- 06

- 2 Ethylene dichloride (1,2

- Dichloroethane)

107

- 21

- 1 Ethylene glycol

151

- 56

- 4 Ethylene imine (Aziridine)

75

- 21

- 8 Ethylene oxide

96

- 45

- 7 Ethylene thiourea

75

- 34

- 3 Ethylidene dichloride (1,1

- Dichloroethane)

50

- 00

- 0 Formaldehyde

76

- 44

- 8 Heptachlor

118

- 74

- 1 Hexachlorobenzene

87

- 68

- 3 Hexachlorobutadiene

77

- 47

- 4 Hexachlorocyclopentadiene

67

- 72

- 1 Hexachloroethane

822

- 06

- 0 Hexamethylene

- 1,6

- diisocyanate

680

- 31

- 9 Hexamethylphosphoramide

110

- 54

- 3 Hexane

18540

- 29

- 9 Hexavalent chromium

302

- 01

- 2 Hydrazine

7647

- 01

- 0 Hydrochloric acid

7664

- 39

- 3 Hydrogen fluoride (Hydrofluoric acid)

123

- 31

- 9 Hydroquinone

78

- 59

- 1 Isophorone

58

- 89

- 9 Lindane (all isomers)

108

- 31

- 6 Maleic anhydride

67

- 56

- 1 Methanol

72

- 43

- 5 Methoxychlor

74

- 83

- 9 Methyl bromide (Bromomethane)

74

- 87

- 3 Methyl chloride (Chloromethane)

71

- 55

- 6 Methyl chloroform (1,1,1

- Trichloroethane)

60

- 34

- 4 Methyl hydrazine

74

- 88

- 4 Methyl iodide (Iodomethane)

108

- 10

- 1 Methyl isobutyl ketone (Hexone)

624

- 83

- 9 Methyl isocyanate

80

- 62

- 6 Methyl methacrylateAPPENDIX B

Primary Aluminum Reduction Section 114 Appendix B

- April 2 2 , 2011 Page 4 of 5 CAS

Number Chemical Name

1634

- 04

- 4 Methyl tert butyl ether

101

- 14

- 4 4,4

- Methylene bis(2

- chloroaniline)

75

- 09

- 2 Methylene chloride (Dichloromethane)

101

- 68

- 8 Methylene diphenyl diisocyanate (MDI)

101

- 77

- 9 4,4'¬

- Methylenedianiline

91

- 20

- 3 Naphthalene

98

- 95

- 3 Nitrobenzene

92

- 93

- 3 4

- Nitrobiphenyl

100

- 02

- 7 4

- Nitrophenol

79

- 46

- 9 2

- Nitropropane

684

- 93

- 5 N

- Nitroso

- N

- methylurea

62

- 75

- 9 N

- Nitrosodimethylamine

59

- 89

- 2 N

- Nitrosomorpholine

56

- 38

- 2 Parathion

82

- 68

- 8 Pentachloronitrobenzene (Quintobenzene)

87

- 86

- 5 Pentachlorophenol

108

- 95

- 2 Phenol

106

- 50

- 3 p

- Phenylenediamine

75

- 44

- 5 Phosgene

7803

- 51

- 2 Phosphine

7723

- 14

- 0 Phosphorus

85

- 44

- 9 Phthalic anhydride

1336

- 36

- 3 Polychlorinated biphenyls (Aroclors)

1 120

- 71

- 4 1,3

- Propane sultone

57

- 57

- 8 beta

- Propiolactone

123

- 38

- 6 Propionaldehyde

114

- 26

- 1 Propoxur (Baygon)

78

- 87

- 5 Propylene dichloride (1,2

- Dichloropropane)

75

- 56

- 9 Propylene oxide

75

- 55

- 8 1,2

- Propylenimine (2

- Methyl aziridine)

91

- 22

- 5 Quinoline

106

- 51

- 4 Quinone

100

- 42

- 5 Styrene

96

- 09

- 3 Styrene oxide

1746

- 01

- 6 2,3,7,8

- Tetrachlorodibenzo

- p

- dioxin

79

- 34

- 5 1,1,2,2

- Tetrachloroethane

127

- 18

- 4 Tetrachloroethylene (Perchloroethylene)

7550

- 45

- 0 Titanium tetrachloride

108

- 88

- 3 Toluene

95

- 80

- 7 2,4

- Toluene diamine

584

- 84

- 9 2,4

- Toluene diisocyanate

95

- 53

- 4 o

- Toluidine

8001

- 35

- 2 Toxaphene (chlorinated camphene)

120

- 82

- 1 1,2,4

- TrichlorobenzeneAPPENDIX B

Primary Aluminum Reduction Section 114 Appendix B

- April 2 2 , 2011 Page 5 of 5 CAS

Number Chemical Name

79

- 00

- 5 1,1,2

- Trichloroethane

79

- 01

- 6 Trichloroethylene

95

- 95

- 4 2,4,5

- Trichlorophenol

88

- 06

- 2 2,4,6

- Trichlorophenol

121

- 44

- 8 Triethylamine

1582

- 09

- 8 Trifluralin

540

- 84

- 1 2,2,4

- Trimethylpentane

108

- 05

- 4 Vinyl acetate

593

- 60

- 2 Vinyl bromide

75

- 01

- 4 Vinyl chloride

75

- 35

- 4 Vinylidene chloride (1,1

- Dichloroethylene)

1330

- 20

- 7 Xylenes (isomers and mixture)

95

- 47

- 6 o

- Xylenes

108

- 38

- 3 m

- Xylenes

106

- 42

- 3 p

- Xylenes

NOTE: For all listings above which contain the word "compounds" and for glycol
ethers, the following applies: Unless otherwise specified, these listings are defined as
including any unique chemical substance that contains the named chemical (i.e.,
antimony, arsenic, etc.) as part of that chemical's infrastructure.

1 : X'CN where X = H' or any other group where a formal dissociation may occur. For
example KCN or Ca(CN)2

2 : Includes mono

- and di

- ethers of ethylene glycol, diethylene glycol, and triethylene
glycol R

- (OCH2CH2)n

- OR' where :

n = 1, 2, or 3

R = alkyl or aryl groups

R' = R, H, or groups which, when removed, yield glycol ethers with the structure:

R

- (OCH2CH)n

- OH. Polymers are excluded from the glycol category. Also

excludes ethylene glycol monobutyl ether (EGBE) (2

- Butoxyethanol)
(Chemical Abstract Service (CAS) No. 111

- 76

- 2) and surfactant alcohol
ethoxylates and their derivatives (SAED)

.

3 : Includes mineral fiber emissio ns from facilities manufacturing or processing glass,
rock, or slag fibers (or other mineral derived fibers) of average diameter 1

micrometer or less.

4 : Includes organic compounds with more than one benzene ring, and which have a
boiling point greater tha n or equal to 100o C. Report individual polycyclic aromatic
hydrocarbons by CAS number.

5 : A type of atom which spontaneously undergoes radioactive decay.APPENDIX C

Primary Aluminum Reduction Section 114 Appendix C

- April 2 2 , 2011 Page 1 of 1 Guidance For Calculating And Reporting Measurements Less Than

Method Detection Levels For Test Data Submitted in Response to Information Collection Request (ICR) Programs

Identify the status of measured values relative to detection leve ls on the spreadsheet using the following descriptions:

BDL (below detection level)

– all analytical values used to calculate and report a fabric filter particulate matter

, electrostatic precipitator particulate matter

, sludge, or scrubber

blowdown metal a nalysis are less than the laboratory ‟s reported detection level(s);

DLL (detection level li mited)

– at least one

, but not all

, values used to calculate and

report a fabric filter particulate matter

, electrostatic precipitator particulate matter

, sludge,

or scrubber blowdown metal analysis are less than the laboratory‟s reported detection level(s); or

ADL (above detection level)

– all analytical values used to calculate and report a fabric filter particulate matter

, electrostatic precipitator particulate mat ter

, sludge, or scrubber

blowdown metal analysis are greater than the laboratory‟s reported detection level(s).

For each reported emissions value, insert the appropriate flag (i.e. BDL, DLL , or ADL) in

the Note line of the Microsoft® Excel emission t est spreadsheet template.

When reporting and calculating individual test run data:

For analytical data reported from the lab as “nondetect” or “below detection level;”

Include a brief description of the procedures used to determine the analytical

detection le vels in the Note line of the Microsoft® Excel emission t est spreadsheet template.

Describe these procedures completely in a separate attachment including the measurements made, the standards used, and the statistical procedures applied.

Report the calculat ed emissions concentration or rate result as a bracketed “less than” detection level value (e.g., [<0.0105]) in the Microsoft® Excel emission t est spreadsheet template

Report as numerical values (i.e., no brackets or < symbol) any analytical data

measured above the detection level including any data between the analytical detection level and a laboratory

- specific reporting or quantification level (i.e., flag as ADL).