AIR QUALITY PERMIT NO. 53592 

FREEPORT MCMORAN –MIAMI SMELTER

I. INTRODUCTION 

 This Class I renewal permit is being issued to Freeport McMoRan Miami Inc., the Permittee, for 

the continued operation of a copper smelter in Miami in Gila county, Arizona. This permit 

renews and supersedes Operating Permit No. 1000046 (as revised by Significant Revision No. 

29622). 

A. Company Information

Facility Name: Freeport McMoRan Miami Inc. (FMMI) 

Mailing Address: P.O. Box 4444 

 Claypool, Arizona 85532 

 

Facility Address: Hwy 60, North of Miami 

 Miami, Gila County, Arizona 85532 

B. Attainment Classification

 Miami area is currently designated as a non-attainment area for particulate matter less 

than 10 microns (PM10), maintenance for sulfur dioxide and attainment for all other 

criteria pollutants. 

C. Learning Sites Evaluation 

In accordance with ADEQ’s Environmental Permits and Approvals near Learning Sites 

Policy, the Department conducted an evaluation to determine if any nearby learning sites 

are located within a two mile radius of the facility. Learning sites consist of all existing 

public schools, charter schools and private schools at the K-12 level, and all planned sites 

for schools approved by the Arizona School Facilities Board. The learning sites policy 

was established to ensure that the protection of children at learning sites is considered 

before a permit approval is issued by ADEQ.

There are no learning sites within 2 miles of the facility. 

II. FACILITY DESCRIPTION 

 A. Material Handling and Bedding Plant 

Copper concentrate is delivered to the bedding plant by truck and rail car. In bedding 

plant, the stockpiles of smelter feed are built up and prepared for feed to IsaSmelt (Isa) 

furnace. The metallurgical characteristics of each pile are determined, and the flux 

requirements calculated. The concentrate is conveyed to bins, and then to blending belt 

where coal, fluxes and reverts are blended with concentrates of copper and other metals, 

and routed to a paddle mixer, and then to Isa furnace. 

Permit No. 53592 Page 1 of 14 November 26, 2012 

Freeport McMoRan Miami Smelter 
Flux coal and reverts are delivered to the smelter by dump trucks and stored in individual 

storage bins. From the storage bins, these are then metered onto the blending belt that 

carries concentrate to the paddle mixer. 

B. Smelter 

IsaSmelt furnace is the primary smelting furnace. Ore concentrates, fluxes and reverts 

are fed, along with oxygen enriched air and fuel to Isa furnace. In the IsaSmelt process, 

heat is utilized from the partial oxidation of sulfide charge, thus saving energy costs. The 

electric furnace receives matte/slag mixture from Isa vessel and slag from converters. 

Once the copper matte settles down, slag on the top is removed and hauled to slag storage 

area. Matte is tapped from the electric furnace into ladles and transported by cranes to 

converters (four Hoboken and one Inspiration). Blister copper from converters is 

transferred by ladles to two anode furnaces for refining. 

Exhaust gases from the Isa vessel are routed trough a waste heat boiler (WHB) where a 

portion of entrained dust settles out. The collected dust is returned to the bedding plant 

or reverts bin. The gases from the WHB are routed to an electrostatic precipitator (ESP). 

Dust from the ESP is collected and sent to electric furnace or reverts bin. The gases are 

routed to a double contact acid plant. 

Process gases from electric furnace are cooled off in an off-take duct with water sprays 

and then routed to the acid plant. 

Converter gases are cooled by water sprays and then combined with gases from Isa vessel 

and electric furnace, and routed to the acid plant. These gases are treated in the acid plant 

and exhaust at the acid plant tail gas stack. 

Emissions from the electric furnace matte tapping launders, furnace converter slag return 

launders, furnace slag tapping launders, and Isa vessel matte tapping launders are 

collected by vent fume system. These gases pass through a chemical scrubber and wet 

electrostatic precipitators (WESPs) and then exhaust through the vent fume stack. 

Electrolytic Refinery 

The cast electrodes are transported to the electrolytic refinery at Miami or El Paso. In the 

refinery, copper is separated from impurities by electrolysis. Metallic impurities settle at 

the bottom sludge of refinery tanks. The sludge is removed to recover precious metals. 

Scrap copper from the refinery is returned to the smelter. 

The electrolytic refinery has 2 natural-gas fired boilers. 

 Rod Plant 

At the rod plant cathodes from various sources are melted in a gas-fired shaft furnace, 

and molded into copper rods using a continuous caster and rolling mill. The rod is 

brightened by cleaning with isopropyl alcohol, wax coating is applied and the rod is 

coiled. Scrap copper is returned to smelter. 

III. COMLIANCE HISTORY 

 There have been 122 air quality inspections (106 file reviews and 16 facility inspections) 

associated with this facility since 2006. One air quality violation was developed for this facility 

as a result of these inspections. 

Permit No. 53592 Page 2 of 14 November 26, 2012 

Freeport McMoRan Miami Smelter 
The facility was issued a Notice of Violation (No. 121311) on November 1, 2010 exceeding the 

particulate matter emission limit on the acid plant tail gas stack during performance test 

conducted on May 14 and 15, 2010. The case was closed on November 29, 2010 as the facility 

documented compliance by subsequent performance test on June 30, 2010 which demonstrated 

that the emission source was brought back into compliance. 

IV. FACILITYWIDE EMISSIONS 

Following tables provide summary of the facility-wide potential-to-emit (PTE), and facility-wide 

PTE for greenhouse gases. 

 

Table 1: Facility-wide PTE 

 Pollutant Non Fugitive Emissions Fugitive Emissions Total 

 tpy tpy tpy 

PM 407.00 1007.00 1414.00 

PM10 387.00 422.00 809.00 

PM2.5 354.00 211.00 565.00 

SO2* 4866.00 5517.00 10383.00 

NOx 545.00 68.40 613.40 

CO 65.10 57.40 122.50 

VOCs 8.29 191.00 199.29 

Total HAPs** 158.49 

*SO2 emissions for acid plant tail gas stack, vent fume stack, and fugitives are based on existing 

permit limits 

** Lead PTE based on existing permit limit of 105 tpy for vent fume stack, and 44.45 tpy for 

smelter fugitives 

Table 2: Facility-Wide PTE for Greenhouse Gases 

Total Greenhouse Gas Emissions Emission Unit 

(CO2 equivalent Metric Tons) 

Smelter Natural Gas/coke including Isa Vessel, 

converters, mold pouring, electric furnace, 

anode furnaces, etc. 

787,766 

Boilers/heaters 40,404 

Generators 3,069 

Rod Plant Shaft Furnace 25,287 

Others 10,878 

Total 867,405 

V. APPLICABLE REGULATIONS VERIFICATION 

The Permittee has identified the applicable regulations that apply to each unit in the permit 

application. The following table summarizes the findings of the Department with respect to 

applicability or non-applicability of applicable regulations that apply to each unit. Installation 

Permit and other previous permit conditions are discussed under Section VII of this technical 

review document.

Permit No. 53592 Page 3 of 14 November 26, 2012 

Freeport McMoRan Miami Smelter 
Table 3: Applicable regulations verification 

Unit ID Control 

Equipment 

Applicable 

Regulations 

Verification 

Material Handling 

and Bedding Plant 

Baghouses for 

individual 

storage bins, 

water sprays 

A.A.C. R18-2-702.B 

A.A.C. R18-2-715 

Standards of Performance for Existing 

Primary Copper Smelters A.A.C. R18-

2-715 are applicable to the material 

handling and bedding plant. 

The particulate matter emission limits 

from Installation permit #1232 are 

retained in the Title V permit. 

Process Gases from 

the IsaSmelt 

Furnace and 

Converters (Acid 

Plant Tail Gas 

Stack) 

Acid Plant, 

and Chemical 

Scrubber for 

control of SO2 

emissions 

40 CFR 60 Subpart P 

40 CFR 63 Subpart 

QQQ 

A.A.C. R18-2-715 

A.A.C. R18-2-715.01

As the IsaSmelt furnace was installed 

in the early-90s, after the October 6, 

1974 trigger date for 40 CFR 60 

Subpart P, acid plant tail gas stack is 

subject to New Source Performance 

Standards (NSPS) under 40 CFR 60 

Subpart P. 

The National Emission Standard for 

Hazardous Air Pollutants (NESHAP) 

Subpart QQQ is applicable to any 

existing or new copper smelter that is 

a major source of HAP emissions. 

Standards of Performance for Existing 

Primary Copper Smelters A.A.C. R18-

2-715 and 715.01 are applicable to the 

smelter facility. 

Additionally, the particulate matter, 

lead and SO2 emissions are subject to 

the emission standards from the 

installation permit #1232. Also, NOX 

emission limitation from the PSD 

permit revision #1000266 is retained.

Vent Fume Stack Wet scrubber, 

Wet 

Electrostatic 

Precipitators 

(ESPs) 

40 CFR 63 Subpart 

QQQ 

A.A.C. R18-2-715 

A.A.C. R18-2-715.01

The Vent Fume stack is subject to 

NESHAP 40 CFR 63 Subpart QQQ. 

Standards of Performance for Existing 

Primary Copper Smelters A.A.C. R18-

2-715 and 715.01 are applicable to the 

smelter facility. 

Additionally, the particulate matter, 

lead and SO2 emissions are subject to 

the emission standards for the vent 

fume stack from installation permit 

#1232. 

Permit No. 53592 Page 4 of 14 November 26, 2012 

Freeport McMoRan Miami Smelter 
Unit ID Control 

Equipment 

Applicable Verification 

Regulations 

Smelter Fugitives 

A.A.C. R18-2-702.B 

A.A.C. R18-2-702.E

40 CFR 63 Subpart 

QQQ 

Opacity standard from A.A.C R18-2-

702.B and E are applicable to 

emissions from the smelter building. 

Smelter building is also subject to 

NESHAP 40 CFR 63 Subpart QQQ.

Converters N/A 40 CFR 61 Subpart O The facility is subject this standard for 

arsenic emissions under 40 CFR 61 

Subpart O. 

Anode Furnaces 

and Utility Vessels 

Steam 

Injection 

System 

A.A.C. R18-2-702.B, 

A.A.C. R18-2-702.E 

Opacity standard from A.A.C R18-2-

702.B and E are applicable to 

emissions from the anode furnaces and 

utility vessels. 

Change Room 

Boiler, Acid Plant 

Pre-heater, Rod 

Plant Thermal 

Breaker Heater 

N/A A.A.C. R18-2-724 The fossil-fuel fired industrial 

equipment boilers and heaters are 

subject to A.A.C. R18-2-724. These 

boilers/heaters are less than 10 

MMBtu/hr each, and hence not subject 

to 40 CFR 60 subpart Dc. 

Isa Auxiliary 

Boiler and 

Electrolytic 

Refinery Boilers 

N/A 40 CFR 60 Subpart 

Dc 

These boilers, each more than 10 

MMBtu/hr and installed after the 

trigger date of June 9, 1989 are subject 

to 40 CFR 60 Subpart Dc. 

Screening Machine A.A.C R18-2-721 

A.A.C R18-2-722 

A.A.C. R18-2-702 

A.A.C R18-2-721-Standards of 

Performance for Existing Nonferrous 

Metals Industry Sources, and A.A.C 

R18-2-722-Standards of Performance 

for Existing Gravel or Crushed Stone 

Processing Plants are applicable to 

screening machine. 

Diesel Engines None A.A.C. R18-2-719 Engines constructed prior to 2006 are 

subject to Existing Stationary Rotating 

Machinery standards under A.A.C. 

R18-2-719. 

The engines constructed after 2006 are 

subject to NSPS 40 CFR 60 Subpart 

IIII. Less than 500 brake HP engines 

located at a major source of HAP 

emissions are required to comply with 

the requirements of 40 CFR 63 

Subpart ZZZZ by meeting the 

Permit No. 53592 Page 5 of 14 November 26, 2012 

Freeport McMoRan Miami Smelter 
Unit ID Control 

Equipment 

Applicable Verification 

Regulations 

requirements of 40 CFR 60 Subpart 

IIII. 

The National Emission Standard for 

Hazardous Air Pollutants (NESHAP) 

Subpart ZZZZ is applicable to 

reciprocating internal combustion 

engines (RICE) located at major and 

area sources of HAPs. Existing 

emergency stationary RICE with a site 

rating of more than 500 brake HP 

located at a major source of HAP 

emissions are not required to meet the 

requirements of this Subpart (40 CFR 

6590(b)(3)(iii)). 

Gasoline Storage 

Tanks 

None A.A.C. R18-2-710 The gasoline storage tank is subject to 

the requirements under A.A.C. R18-2-

710. 

NSPS Subpart Kb is not applicable as 

the capacity of gasoline storage tank is 

less than 20,000 gallons. 

Electrolytic 

refining and Anode 

slime processing 

operations 

Rod Plant Shaft 

Furnace, Thermal 

Breaker, Cooling 

Towers, Misc. 

Storage Tanks 

A.A.C. R18-2-730 These units are not covered by any 

specific existing source standard. They 

are, hence, regulated as unclassified 

sources under A.A.C. R18-2-730. 

Fugitive Dust 

Sources 

Water and 

other 

reasonable 

precautions 

A.A.C. Article 6, 

A.A.C. R18-2-702 

These standards are applicable to all 

fugitive dust sources at the facility. 

Mobile Sources Water 

Sprays/Water 

Truck for dust 

control 

N/A 

A.A.C. R18-2 Article 

8 

This Article is applicable to off-road 

mobile sources, which either move 

while emitting air pollutants or are 

frequently moved during the course of 

their utilization. 

Permit No. 53592 Page 6 of 14 November 26, 2012 

Freeport McMoRan Miami Smelter 
Unit ID Control 

Equipment 

Applicable Verification 

Regulations 

Other Periodic 

Activities 

Various A.A.C. R18-2-727 

A.A.C. R18-2-730 

A.A.C. R18-2-

1101.A.8 

This section deals with activities such 

as sandblasting, spray painting, 

demolition/renovation asbestos 

control, and gaseous or odorous 

materials handling. 

Ambient Monitors A.A.C. R18-2-215 

A.A.C. R18-2-216 

A.A.C. R18-2-

715.02.E

Ambient air quality standards and 

requirement to operate ambient 

monitors 

 

VI. PREVIOUS PERMIT CONDITIONS 

A. Previous Permits 

The table below lists previous permits held by this facility. 

Table 4: Previous Permits

Permit Number Date Issued Application Basis 

29622 July 5, 2006 Title V Significant Permit Revision (Permit No. 

1000046 revised and reissued) 

37553 May 11, 2006 Minor Permit Revision 

41848 May 1, 2007 Significant Permit Revision 

43398 February 14, 2008 Significant Permit Revision 

45593 March 13, 2008 Minor Permit Revision 

48448 April 15, 2009 Minor Permit Revision 

49986 November 17, 2009 Minor Permit Revision 

54218 February 8, 2012 Minor Permit Revision 

55226 May 7, 2012 Minor Permit Revision 

55691 Granted Minor Permit Revision 

B. Previous Permit Conditions

Following table compares the conditions in Permit No. 1000046 (as revised by 

Significant Permit Revision No. 29622) with the conditions in this renewal permit. 

Permit No. 53592 Page 7 of 14 November 26, 2012 

Freeport McMoRan Miami Smelter 
Table 5: Comparison with pervious permit conditions 

Condition # in Determination Comments

Permit No. 

29622

Deleted Kept Revised Streamlined

Attachment “A” x This Attachment has been revised and 

the most recent Attachment “A” is used 

for this permit. 

Attachment “B” 

Conditions I.A to 

-C 

x The facility-wide requirements for an 

EPA Method 9 certified observer, and 

submittal of compliance certifications & 

monthly reports are retained. 

Conditions I.D 

though M 

x 40 CFR 63 Subpart QQQ general 

requirements, as revised by Permit 

Revision Nos. 41848 and 45593 (except 

initial compliance demonstration 

requirements) are retained. 

Section II x The throughput limitations for the 

concentrate and monitoring, 

recordkeeping and reporting 

requirements from the Installation Permit 

No. 1232 are retained. The requirements 

for recyclable waste are deleted as the 

facility will not longer be processing any 

recyclable waste. 

Condition III.A x Particulate matter emission standards in 

the Installation Permit No. 1232 for 

material handling and bedding plant are

retained. 

Condition III.B x Air pollution control requirements in the 

Installation Permit No. 1232 for material 

handling and bedding plant are retained. 

Conditions 

IV.A.1.a and d 

x Particulate matter and lead emission 

limitations from the Installation Permit 

No. 1232 for acid plant tail gas stack are 

retained. 

Conditions 

IV.A.1.b and c 

x Non sulfuric acid particulate matter 

emission standard and opacity standard 

for tail gas stack are retained. 

Conditions 

IV.A.2.a and b 

x Opacity and emissions monitoring 

requirements for the tail gas stack are 

retained. 

Permit No. 53592 Page 8 of 14 November 26, 2012 

Freeport McMoRan Miami Smelter 
Condition # in Determination Comments

Permit No. 

29622

Deleted Kept Revised Streamlined

IV.A.3.a through 

c 

x The performance test requirements for 

particulate matter, opacity and lead 

emissions are retained. 

Conditions 

IV.A.3.d, 4, 5 

x The initial compliance demonstration 

requirements for 40 CFR 63 Subpart 

QQQ are already complied with, and 

hence deleted. 

Condition IV.A.6 x The continuous compliance 

demonstration requirements for 40 CFR 

63 Subpart QQQ are retained. 

Conditions 

IV.B.1.a and b 

x Sulfur dioxide emission limitations from 

the Installation Permit No. 1232, and 40 

CFR 60 Subpart F for acid plant tail gas 

stack are retained. 

Conditions 

IV.B.2.a and b 

x Air pollution control requirements for 

SO2 are retained. 

Condition IV.B.3 x The monitoring, reporting and 

recordkeeping requirements for SO2 are 

retained. 

Condition IV.C.1 x The NOx emission standards from the 

Permit Revision No. 1000266 to 

Installation Permit No. 1232 for acid 

plant tail gas stack are retained. 

 

Conditions IV.C.2 

and 3 

x The monitoring, reporting &

recordkeeping, and performance testing 

requirements for NOx are retained.

Condition V.A.1 x Particulate matter, opacity and lead 

emission limitations from the Installation 

Permit No. 1232 are retained. Also, 

particulate matter and opacity emission 

standards from A.A.C. R18-2-715 & 40 

CFR 63 Subpart QQQ for the vent fume 

stack are retained. 

Condition V.A.2.a x Air pollution control requirements in the 

Installation Permit No. 1232 for vent 

fume stack are retained. 

Condition 

V.A.2.b and c

x Air pollution control requirements for 

the capture system to collect gases from 

copper matte or slag tapping ports are 

retained. 

Permit No. 53592 Page 9 of 14 November 26, 2012 

Freeport McMoRan Miami Smelter 
Condition # in Determination Comments

Permit No. 

29622

Deleted Kept Revised Streamlined

Condition 

V.A.2.d

x The monitoring requirement for the wet 

scrubber is retained. 

Condition V.A.3 x Opacity, particulate matter emission 

monitoring, requirements for the vent 

fume stack is retained. 40 CFR 63 

Subpart QQQ requirements are revised 

to include requirements for wet ESPs in 

addition to those for wet scrubbers. 

Condition V.A.4 x The performance testing requirements 

for the vent fume stack are retained. 

Condition V.A.5 x The initial compliance demonstration 

requirements for 40 CFR 63 Subpart 

QQQ are already complied with, and 

hence deleted.

Condition V.A.6 x The continuous compliance 

demonstration requirements for 40 CFR 

63 Subpart QQQ are retained.

Section VI x The requirements for smelter fugitives 

are retained. 

Section VII x The requirements for anode furnace and 

utility vessels are retained. 

Section VIII x The requirements for fuel burning 

equipment are streamlined. Fuel burning 

equipment for electrolytic refinery and 

rod plan are moved to their respective 

Section. Also, the requirements for Isa 

Auxiliary Boiler and Electrolytic 

Refinery Boilers are revised as these 

boilers are subject to 40 CFR 60 Subpart 

Dc. 

Section IX x The requirements for stationary rotating 

machinery, as revised by Permit 

Revision Nos. 54218, 55226 and 55691 

are retained. Additionally, 40 CFR 63 

Subpart ZZZZ requirements for affected 

engines are included. 

Section X x The facility-wide requirements for SO2

emissions (Multi Point Rollback Rule) 

are retained. 

Permit No. 53592 Page 10 of 14 November 26, 2012 

Freeport McMoRan Miami Smelter 
Condition # in Determination Comments

Permit No. 

29622

Deleted Kept Revised Streamlined

Section XI x The requirements for converters arsenic 

charging rate are retained. 

Section XII x The requirements for electrolytic refinery 

and rod plant are retained, and are now 

located under separate sections. Also, 

the requirements for rod plant are revised 

to include new air pollution control 

requirements for catalytic oxidizer unit. 

Section XIII x The requirements for continuous 

emission monitoring system (CEMS) are 

streamlined to locate all CEMS 

requirements from various Sections 

under this Section. 

Section XIV x The requirements for non-point sources 

are retained. This section is now 

renamed as “Fugitive Dust Sources”. 

Also, the requirements for open burning 

are deleted as these activities will be 

covered under separate permit as and 

when required. 

Section XV x This section for other periodic activities 

requirements is replaced with the most 

recent version of the language currently 

used in ADEQ permits. 

Section XVI x The requirements for miscellaneous 

storage tanks are retained.

Section XVII x The section is renamed as “Gasoline 

Storage Tanks”, is revised to include 

additional monitoring and recordkeeping 

requirements from A.A.C. R18-2-710. 

Section XVIII x The ambient monitoring requirements 

are revised to include current ADEQ data 

reporting requirements. 

 

Section XIX x The requirements for screening machine 

are streamlined to include screening of 

copper bearing material under Section 

XXII (as authorized by Permit Revision 

No. 48448) 

Section XX x The requirements for high vacuum 

desorption unit are deleted as the facility 

no longer intends to use this system. 

Permit No. 53592 Page 11 of 14 November 26, 2012 

Freeport McMoRan Miami Smelter 
Condition # in Determination Comments

Permit No. 

29622

Deleted Kept Revised Streamlined

Section XXI x The requirements for coal injection 

system, as revised by Permit Revision 

No. 43398 are deleted as these were 

never implemented and the facility no 

longer intends to make these changes. 

Attachment “D” x The procedure for sulfur balance method, 

as revised by Permit Revision No. 

49986, is retained. 

Attachment “E” x The fugitive dust control requirements 

are retained. 

Attachment “F” x The operation and maintenance 

requirements are retained. 

VII. MONITORING, RECORDKEEPING AND REPORTING REQUIREMENTS 

A. Feed to smelter 

 The Permittee is required to limit the feed of concentrate to Isa and Electric furnace to 

850,000 tons per year. The Permittee is required to maintain records of daily, monthly 

and rolling twelve month totals of concentrate feed. 

B. Opacity Monitoring 

1. The Permittee is required to conduct bi-weekly monitoring of opacity from the 

stacks associated with material handling and bedding plant, tail gas stack, vent 

fume stack, smelter building, anode furnaces and utility vessels building, 

screening machine, anode slimes dryer, electrolytic refinery, rod plant shaft 

furnace and thermal breaker stacks; and fugitive dust sources. 

2. The Permittee is required to conduct monthly monitoring of opacity from the 

stacks associated boilers and heaters, rod plant thermal breaker heater, diesel 

engines 

3. The Permittee is required to conduct quarterly monitoring of opacity from the 

cooling towers. 

 C. Particulate Matter 

The Permittee is required to operate and maintain continuous parametric monitoring 

system to monitor flow rate on the wet scrubber, and operating parameters for wet 

electrostatic precipitators to minimize particulate matter emissions from the vent fume 

stack. 

 D. Sulfur Dioxide 

1. The Permittee is required to operate continuous emission monitoring system (CEMS) 

on the tail gas stack and vent fume stack to monitor sulfur dioxide emissions. 

Permit No. 53592 Page 12 of 14 November 26, 2012 

Freeport McMoRan Miami Smelter 
2. The Permittee is required to perform monthly material balance for determining 

facility-wide sulfur dioxide emissions. The Permittee must report average monthly 

emission, annual average emissions and number of 3-hour emission averages that 

exceeded the applicable emission levels. 

3. The Permittee is required to submit a monthly report of all periods when the valve 

bypassing the sulfur removal equipment was operated 

 E. Arsenic 

The Permittee is required to compute 12-month average arsenic charging rate in pounds 

per hour every month and maintain records of these calculations. The Permittee is 

required to submit annual report of monthly computations of annual arsenic charging 

rates. 

VIII. PERFORMANCE TESTING REQUIREMENTS 

A. The Permittee is required to conduct EPA Reference Method 5 performance tests on two 

representative stacks from the concentrate, flux, revert, and coal bins in the first year of 

the permit term to show compliance with the particulate matter emission limits 

B. The Permittee is required to conduct annual performance test for particulate matter 

emissions from the tail gas stack and vent fume stack to demonstrate compliance with 

40 CFR 63 Subpart QQQ emission limitations. 

C. The Permittee is required to conduct semi-annual performance tests for particulate matter 

emissions from the vent fume stack and acid plant tail gas stack to demonstrate 

compliance with the hourly and annual emission limitations. 

D. The Permittee is required to conduct semi-annual performance tests for lead emissions 

from the vent fume stack and acid plant tail gas stack to demonstrate compliance with the 

hourly and annual emission limitations. 

E. The Permittee is required to conduct semi-annual performance test for nitrogen oxide 

emissions from the acid plant tail gas stack to demonstrate compliance with the hourly 

and annual emission limitations. 

F. The Permittee is required to conduct performance test for nitrogen oxide emissions from 

Isasmelt Auxiliary Boiler in the first year of the permit term to show compliance with the 

emission limit. 

G. The Permittee is required to calibrate continuous emission monitoring system (CEMS) 

for SO2 and gas volumetric flow measurement for tail gas stack and vent fume stack in 

accordance with the schedule identified in the permit. 

IX. COMPLIANCE ASSURANCE MONITORING (CAM) 

The only pollutant-specific emission units that use a control device to achieve compliance and 

have potential pre-control emissions greater than 100 tons per year are the smelter electric 

furnace, Isa vessel and converters which generate sulfur dioxide, particulate matter and nitrogen 

oxides. The process gasses pass through an acid plant before being exhausted through the acid 

plant tail stack to atmosphere. The collected fugitives pass through a scrubber and wet 

electrostatic precipitator before being exhausted through the vent fume stack to atmosphere. 

Permit No. 53592 Page 13 of 14 November 26, 2012 

Freeport McMoRan Miami Smelter 
Permit No. 53592 Page 14 of 14 November 26, 2012 

Freeport McMoRan Miami Smelter 

The sulfur dioxide emissions from both stacks are monitored by CEMS. Thus these stacks are 

exempt from the CAM requirements (40 CFR 64.2(b)(vi)). 

Emissions of particulate matter from the vent fume stack and tail stack particulate are subject to 

Maximum Available Control Technology (MACT) standards proposed after November 15, 1990, 

and hence, are exempt from CAM requirements (40 CFR 64.2(b)(i)). 

No control device is utilized to control NOx emissions in the tail gas. Hence, CAM requirements 

are not applicable for NOx emissions (40 CFR 64.2(a)(2). 

X. LIST OF ABBREVIATIONS 

A.A.C.................................................................................................. Arizona Administrative Code 

AAC....................................................................................................... Ambient Air Concentration 

ADEQ ......................................................................Arizona Department of Environmental Quality 

AQD.................................................................................................................. Air Quality Division 

As...........................................................................................................................................Arsenic 

CAM .......................................................................................... Compliance Assurance Monitoring 

CEMS............................................................................... Continuous Emission Monitoring System 

CFR...................................................................................................... Code of Federal Regulations 

CO......................................................................................................................... Carbon monoxide 

EPA ...................................................................... United States Environmental Protection Agency 

HAP ............................................................................................................ Hazardous Air Pollutant 

HP ...................................................................................................................................Horsepower 

MACT........................................................................... Maximum Achievable Control Technology 

NOx .......................................................................................................................... Nitrogen Oxide 

NOV ................................................................................................................... Notice of Violation 

NESHAPS..............................................National Emission standards for Hazardous Air Pollutants 

NSPS.........................................................................................New Source Performance Standards 

Pb ............................................................................................................................................... Lead 

PM10 ........................................................... Particulate Matter Nominally less than 10 Micrometers 

PSD ......................................................................................Prevention of Significant Deterioration 

PTE .........................................................................................................................Potential-to-Emit 

SIP............................................................................................................State Implementation Plan 

SO2 ............................................................................................................................. Sulfur Dioxide 

TPY............................................................................................................................. Tons per Year 

VOC......................................................................................................Volatile Organic Compound 

WESP.................................................................................................. Wet Electrostatic Precipitator