Subpart XXX—National Emission Standards for Hazardous Air 

Pollutants for Ferroalloys Production: Ferromangaese and 

Silicomanganese

§63.1620 Am I subject to this subpart?

(a) You are subject to this subpart if you own or operate a 

new or existing ferromanganese and/or silicomanganese production 

facility that is a major source or is co-located at a major 

source of hazardous air pollutant emissions.

(b) You are subject to this subpart if you own or operate 

any of the following equipment as part of a ferromanganese 

and/or silicomanganese production facility:

(1) Electric arc furnace,

(2) Casting operations,

(3) Metal oxygen refining (MOR) process,

(4) Crushing and screening operations,

(5) Outdoor fugitive dust sources.

(c) A new affected source is any of the equipment listed in 

paragraph (b) of this section for which construction or 

reconstruction commenced after [insert date of publication in 

the Federal Register].

(d) Table 1 of this subpart specifies the provisions of 
subpart A of this part that apply to owners and operators of 

ferromanganese and silicomanganese production facilities subject 

to this subpart.

(e) If you are subject to the provisions of this subpart, 

you are also subject to title V permitting requirements under 40 

CFR part 70 or 71, as applicable.

(f) Emission standards in this subpart apply at all times.

§63.1621 What are my compliance dates?

(a) Existing affected sources must be in compliance with 

the provisions specified in §§63.1620 through 63.1629 no later 

than [insert date 2 years after date of publication in the 

Federal Register].

(b) Affected sources in existence prior to [insert date of

publication in the Federal Register] must be in compliance with 

the provisions specified in §§63.1650 through 63.1661 by 

November 21, 2001 and until [insert date 2 years after date of 

publication in the Federal Register]. As of [insert date 2 years 

after date of publication in the Federal Register], the 

provisions of §§63.1650 through 63.1661 cease to apply to 

affected sources in existence prior to [insert date of 

publication in the Federal Register]. The provisions of 

§§63.1650 through 63.1661 remain enforceable at a source for its 
activities prior to [insert date 2 years after date of 

publication in the Federal Register].

(c) If you own or operate a new affected source that 

commences construction or reconstruction after November 23, 

2011, you must comply with the requirements of this subpart by 

[insert date of publication in the Federal Register], or upon 

startup of operations, whichever is later.

§63.1622 What definitions apply to this subpart?

Terms in this subpart are defined in the Clean Air Act 

(Act), in subpart A of this part, or in this section as follows:

Bag leak detection system means a system that is capable of 

continuously monitoring particulate matter (dust) loadings in 

the exhaust of a baghouse in order to detect bag leaks and other 

upset conditions. A bag leak detection system includes, but is 

not limited to, an instrument that operates on triboelectric, 

light scattering, light transmittance, or other effect to 

continuously monitor relative particulate matter loadings.

Capture system means the collection of components used to 

capture the gases and fumes released from one or more emissions 

points and then convey the captured gas stream to a control 

device or to the atmosphere. A capture system may include, but 

is not limited to, the following components as applicable to a 
given capture system design: duct intake devices, hoods, 

enclosures, ductwork, dampers, manifolds, plenums, fans and 

roofline ventilation systems.

Casting means the period of time from when molten 

ferroalloy is removed from the tapping station until the pouring 

into casting molds or beds is completed. This includes the 

following operations: pouring alloy from one ladle to another, 

slag separation, slag removal and ladle transfer by crane, 

truck, or other conveyance.

Crushing and screening equipment means the crushers, 

grinders, mills, screens and conveying systems used to crush, 

size and prepare for packing manganese-containing materials, 

including raw materials, intermediate products and final 

products.

Electric arc furnace means any furnace where electrical 

energy is converted to heat energy by transmission of current 

between electrodes partially submerged in the furnace charge. 

The furnace may be of an open, semi-sealed, or sealed design.

Furnace process cycle means the period in which the furnace

is tapped to the time in which the furnace is tapped again and 

includes periods of charging, smelting, tapping, casting and 

ladle raking. For multiple furnaces operating within a single 

shop building, furnace process cycle means a period sufficient 
to capture a full cycle of charging, smelting, tapping, casting 

and ladle raking for each furnace within the shop building.

Ladle treatment means a post-tapping process including 

metal and alloy additions where chemistry adjustments are made 

in the ladle after furnace smelting to achieve a specified 

product.

Local ventilation means hoods, ductwork, and fans designed 

to capture process fugitive emissions close to the area where 

the emissions are generated (e.g., tap hoods).

Metal oxygen refining (MOR) process means the reduction of 

the carbon content of ferromanganese through the use of oxygen.

Outdoor fugitive dust source means a stationary source from 

which hazardous air pollutant-bearing particles are discharged 

to the atmosphere due to wind or mechanical inducement such as 

vehicle traffic. Fugitive dust sources include plant roadways, 

yard areas and outdoor material storage and transfer operation 

areas.

Plant roadway means any area at a ferromanganese and 

silicomanganese production facility that is subject to plant 

mobile equipment, such as forklifts, front end loaders, or 

trucks, carrying manganese-bearing materials. Excluded from this 

definition are employee and visitor parking areas, provided they 
are not subject to traffic by plant mobile equipment.

Process fugitive emissions source means a source of 

hazardous air pollutant emissions that is associated with a 

ferromanganese or silicomanganese production facility and is not 

a fugitive dust source or a stack emissions source. Process 

fugitive sources include emissions that escape capture from the 

electric arc furnace, tapping operations, casting operations, 

ladle treatment, MOR or crushing and screening equipment.

Roofline ventilation system means an exhaust system 

designed to evacuate process fugitive emissions that collect in 

the roofline area to a control device.

Shop building means the building which houses one or more 

electric arc furnaces or other processes that generate process 

fugitive emissions.

Shutdown means the cessation of operation of an affected 

source for any purpose.

Startup means the setting in operation of an affected 

source for any purpose.

Tapping emissions means the gases and emissions associated 

with removal of product from the electric arc furnace under 

normal operating conditions, such as removal of metal under 

normal pressure and movement by gravity down the spout into the 
ladle and filling the ladle.

Tapping period means the time from when a tap hole is 

opened until the time a tap hole is closed.

§63.1623 What are the emissions standards for new, reconstructed 

and existing facilities?

(a) Electric arc furnaces. You must install, operate and 

maintain an effective capture system that collects the emissions 

from each electric arc furnace operation and conveys the 

collected emissions to a control device for the removal of the 

pollutants specified in the emissions standards specified in 

paragraphs (a)(1) through (a)(5) of this section.

(1) Particulate matter emissions. 

(i) You must not discharge exhaust gases from each electric 

arc furnace operation containing particulate matter in excess of 

4.0 milligrams per dry standard cubic meter (mg/dscm) into the 

atmosphere from any new or reconstructed electric arc furnace. 

(ii) You must not discharge exhaust gases from each 

electric arc furnace operation containing particulate matter in 

excess of 25 mg/dscm into the atmosphere from any existing 

electric arc furnace. 

(2) Mercury emissions. 
(i) You must not discharge exhaust gases from each electric

arc furnace operation containing mercury emissions in excess of 

13 micrograms per dry standard cubic meter (μg/dscm) into the 

atmosphere from any new or reconstructed electric arc furnace 

when producing ferromanganese.

(ii) You must not discharge exhaust gases from each 

electric arc furnace operation containing mercury emissions in 

excess of 130 μg/dscm into the atmosphere from any existing 

electric arc furnace when producing ferromanganese.

(iii) You must not discharge exhaust gases from each 

electric arc furnace operation containing mercury emissions in 

excess of 4 μg/dscm into the atmosphere from any new or 

reconstructed electric arc furnace when producing 

silicomanganese.

(iv) You must not discharge exhaust gases from each 

electric arc furnace operation containing mercury emissions in 

excess of 12 μg/dscm into the atmosphere from any existing 

electric arc furnace when producing silicomanganese.

(3) Polycyclic aromatic hydrocarbon emissions. 

(i) You must not discharge exhaust gases from each electric 

arc furnace operation containing polycyclic aromatic hydrocarbon 

emissions in excess of 12,000 μg/dscm into the atmosphere from 
any new or reconstructed electric arc furnace when producing 

ferromanganese. 

(ii) You must not discharge exhaust gases from each 

electric arc furnace operation containing polycyclic aromatic 

hydrocarbon emissions in excess of 12,000 μg/dscm into the 

atmosphere from any existing electric arc furnace when producing 

ferromanganese. 

(iii) You must not discharge exhaust gases from each 

electric arc furnace operation containing polycyclic aromatic 

hydrocarbon emissions in excess of 72 μg/dscm into the 

atmosphere from any new or reconstructed electric arc furnace 

when producing silicomanganese. 

(iv) You must not discharge exhaust gases from each 

electric arc furnace operation containing polycyclic aromatic 

hydrocarbon emissions in excess of 130 μg/dscm into the 

atmosphere from any existing electric arc furnace when producing 

silicomanganese.

(4) Hydrochloric acid emissions. 

(i) You must not discharge exhaust gases from each electric 

arc furnace operation containing hydrochloric acid emissions in 

excess of 180 μg/dscm into the atmosphere from any new or 

reconstructed electric arc furnace.
(ii) You must not discharge exhaust gases from each 

electric arc furnace operation containing hydrochloric acid 

emissions in excess of 1,100 μg/dscm into the atmosphere from 

any existing electric arc furnace.

(5) Formaldehyde emissions. You must not discharge exhaust 

gases from each electric arc furnace operation containing 

formaldehyde emissions in excess of 201 μg/dscm into the 

atmosphere from any new, reconstructed or existing electric arc 

furnace.

(b) Process fugitive emissions. 

(1) You must install, operate and maintain a capture system 

that is designed to collect 95 percent or more of the emissions 

from process fugitive emissions sources and convey the collected 

emissions to a control device that is demonstrated to meet the 

applicable emission limit specified in paragraph (a)(1) of this 

section.

(2) The determination of the overall capture must be 

demonstrated as required by §63.1624(a). 

(3) Unless you meet the criteria of paragraph (b)(3)(iii)

of this section, you must not cause the emissions exiting from a 

shop building to exceed an average of 8 percent opacity over a 

furnace or MOR process cycle.
(i) This 8 percent opacity requirement is determined by 

averaging the individual opacity readings observed during the 

furnace or MOR process cycle.

(ii) An individual opacity reading shall be determined as 

the average of 24 consecutive images recorded at 15-second 

intervals with the opacity values from each individual digital 

image rounded to the nearest 5 percent. 

(iii) If the average opacity from the shop building is 

greater than 8 percent opacity during an observed furnace or MOR

process cycle, the opacity of two more additional furnace or MOR

process cycles must be observed within 7 days and the average of 

the individual opacity readings during the three observation 

periods must be less than 8 percent opacity.

(iv) At no time during operation may the average of any two 

consecutive individual opacity readings be greater than 20 

percent opacity.

(c) Local ventilation emissions. If you operate local 

ventilation to capture tapping, casting, or ladle treatment 

emissions and direct them to a control device other than one 

associated with the electric arc furnace, you must not discharge 

into the atmosphere any captured emissions containing 

particulate matter in excess of 4.0 mg/dscm.
(d) MOR process. You must not discharge into the atmosphere 

from any new, reconstructed or existing MOR process exhaust 

gases containing particulate matter in excess of 3.9 mg/dscm.

(e) Crushing and screening equipment. You must not 

discharge into the atmosphere from any new, reconstructed, or 

existing piece of equipment associated with crushing and 

screening exhaust gases containing particulate matter in excess 

of 13 mg/dscm.

(f) At all times, you must operate and maintain any 

affected source, including associated air pollution control 

equipment and monitoring equipment, in a manner consistent with 

safety and good air pollution control practices for minimizing 

emissions. Determination of whether such operation and 

maintenance procedures are being used will be based on 

information available to the Administrator that may include, but 

is not limited to, monitoring results, review of operation and 

maintenance procedures, review of operation and maintenance 

records and inspection of the source.

§63.1624 What are the operational and work practice standards 

for new, reconstructed, and existing facilities?

(a) Process fugitive emissions sources.

(1) You must prepare, and at all times operate according 
to, a process fugitive emissions ventilation plan that documents 

the equipment and operations designed to effectively capture 

process fugitive emissions. The plan will be deemed to achieve 

effective capture if it consists of the following elements:

(i) Documentation of engineered hoods and secondary 

fugitive capture systems designed according to the most recent, 

at the time of construction, ventilation design principles 

recommended by the American Conference of Governmental 

Industrial Hygienists (ACGIH). The process fugitive emissions 

capture systems must be designed to achieve sufficient air 

changes to evacuate the collection area frequently enough to 

ensure process fugitive emissions are effectively collected by 

the ventilation system and ducted to the control device(s). The 

required ventilation systems should also use properly positioned 

hooding to take advantage of the inherent air flows of the 

source and capture systems that minimize air flows while also 

intercepting natural air flows or creating air flows to contain 

the fugitive emissions. Include a schematic for each building 

indicating duct sizes and locations, hood sizes and locations, 

control device types, size and locations and exhaust locations. 

The design plan must identify the key operating parameters and 

measurement locations to ensure proper operation of the system 

and establish monitoring parameter values that reflect effective 

capture. 
(ii) List of critical maintenance actions and the schedule 

to conduct them. 

(2) You must submit a copy of the process fugitive 

emissions ventilation plan to the designated permitting 

authority on or before the applicable compliance date for the 

affected source as specified in §63.1621 in electronic format 

and whenever an update is made to the plan. The requirement for 

you to operate the facility according to the written process 

fugitives ventilation plan and specifications must be 

incorporated in the operating permit for the facility that is 

issued by the designated permitting authority under part 70 or 

71 of this chapter, as applicable.

(3) You must update the information required in paragraph 

(a)(1) and (a)(2) of this section every 5 years or whenever 

there is a significant change in variables that affect process 

fugitives ventilation design such as the addition of a new 

process.

(b) Outdoor fugitive dust sources. 

(1) You must prepare, and at all times operate according 

to, an outdoor fugitive dust control plan that describes in 

detail the measures that will be put in place to control outdoor 

fugitive dust emissions from the individual fugitive dust 

sources at the facility.
(2) You must submit a copy of the outdoor fugitive dust 

control plan to the designated permitting authority on or before 

the applicable compliance date for the affected source as 

specified in §63.1621. The requirement for you to operate the 

facility according to a written outdoor fugitive dust control 

plan must be incorporated in the operating permit for the 

facility that is issued by the designated permitting authority 

under part 70 or 71 of this chapter, as applicable.

(3) You may use existing manuals that describe the measures 

in place to control outdoor fugitive dust sources required as 

part of a state implementation plan or other federally 

enforceable requirement for particulate matter to satisfy the 

requirements of paragraph (b)(1) of this section.

§63.1625 What are the performance test and compliance 

requirements for new, reconstructed, and existing facilities?

(a) Performance testing. 

(1) All performance tests must be conducted according to 

the requirements in §63.7 of subpart A of this part.

(2) Each performance test in paragraphs (c)(1) and (c)(2) 

of this section must consist of three separate and complete runs 

using the applicable test methods.

(3) Each run must be conducted under conditions that are 
representative of normal process operations.

(4) Performance tests conducted on air pollution control 

devices serving electric arc furnaces must be conducted such 

that at least one tapping period, or at least 20 minutes of a 

tapping period, whichever is less, is included in at least two 

of the three runs. The sampling time for each run must be at 

least three times the average tapping period of the tested 

furnace, but no less than 60 minutes.

(5) You must conduct the performance tests specified in 

paragraph (c) of this section under such conditions as the 

Administrator specifies based on representative performance of 

the affected source for the period being tested. Upon request, 

you must make available to the Administrator such records as may 

be necessary to determine the conditions of performance tests.

(b) Test methods. The following test methods in appendices 

of part 60 or 63 of this chapter or as specified elsewhere must 

be used to determine compliance with the emission standards.

(1) Method 1 of Appendix A-1 of 40 CFR part 60 to select 

the sampling port location and the number of traverse points.

(2) Method 2 of Appendix A-1 of 40 CFR part 60 to determine 

the volumetric flow rate of the stack gas.

(3)(i) Method 3A or 3B of Appendix A-2 of 40 CFR part 60 
(with integrated bag sampling) to determine the outlet stack and 

inlet oxygen and CO2 content.

(ii) You must measure CO2 concentrations at both the inlet 

and outlet of the positive pressure fabric filter in conjunction 

with the pollutant sampling in order to determine isokinetic 

sampling rates.

(iii) As an alternative to EPA Reference Method 3B, ASME 

PTC-19-10-1981-Part 10, “Flue and Exhaust Gas Analyses” may be 

used (incorporated by reference, see 40 CFR 63.14).

(4) Method 4 of Appendix A-3 of 40 CFR part 60 to determine 

the moisture content of the stack gas.

(5)(i) Method 5 of Appendix A-3 of 40 CFR part 60 to 

determine the particulate matter concentration of the stack gas 

for negative pressure baghouses and positive pressure baghouses 

with stacks.

(ii) Method 5D of Appendix A-3 of 40 CFR part 60 to 

determine particulate matter concentration and volumetric flow 

rate of the stack gas for positive pressure baghouses without 

stacks.

(iii) The sample volume for each run must be a minimum of 

4.0 cubic meters (141.2 cubic feet). For Method 5 testing only, 

you may choose to collect less than 4.0 cubic meters per run 
provided that the filterable mass collected (i.e., net filter 

mass plus mass of nozzle, probe and filter holder rinses) is 

equal to or greater than 10 mg. If the total mass collected for 

two of three of the runs is less than 10 mg, you must conduct at 

least one additional test run that produces at least 10 mg of 

filterable mass collected (i.e., at a greater sample volume). 

Report the results of all test runs.

(6) Method 30B of Appendix A-8 of 40 CFR part 60 to measure 

mercury. Apply the minimum sample volume determination 

procedures as per the method.

(7)(i) Method 26A of Appendix A-8 of 40 CFR part 60 to 

determine outlet stack or inlet hydrochloric acid concentration.

(ii) Collect a minimum volume of 2 cubic meters.

(8)(i) Method 316 of Appendix A of 40 CFR part 63 to 

determine outlet stack or inlet formaldehyde.

(ii) Collect a minimum volume of 1.0 cubic meter.

(9) ASTM D7520-13, “Standard Test Method for Determining 

the Opacity of a Plume in the Outdoor Ambient Atmosphere” to 

determine opacity (incorporated by reference, see 40 CFR 63.14) 

with the following conditions:

(i) During the digital camera opacity technique (DCOT) 

certification procedure outlined in Section 9.2 of ASTM D7520-
13, you or the DCOT vendor must present the plumes in front of 

various backgrounds of color and contrast representing 

conditions anticipated during field use such as blue sky, trees 

and mixed backgrounds (clouds and/or a sparse tree stand).

(ii) You must have standard operating procedures in place 

including daily or other frequency quality checks to ensure the 

equipment is within manufacturing specifications as outlined in 

Section 8.1 of ASTM D7520-13.

(iii) You must follow the recordkeeping procedures outlined 

in §63.10(b)(1) for the DCOT certification, compliance report, 

data sheets and all raw unaltered JPEGs used for opacity and 

certification determination.

(iv) You or the DCOT vendor must have a minimum of four (4) 

independent technology users apply the software to determine the 

visible opacity of the 300 certification plumes. For each set of 

25 plumes, the user may not exceed 20 percent opacity of any one 

reading and the average error must not exceed 7.5 percent 

opacity.

(v) Use of this method does not provide or imply a 

certification or validation of any vendor’s hardware or 

software. The onus to maintain and verify the certification 

and/or training of the DCOT camera, software and operator in 

accordance with ASTM D7520-13 and these requirements is on the 
facility, DCOT operator and DCOT vendor.

(12) California Air Resources Board (CARB) Method 429, 

Determination of Polycyclic Aromatic Hydrocarbon (PAH) Emissions 

from Stationary Sources to determine total PAH emissions. The 

method is available from California Resources Board, 1102 Q 

Street, Sacramento, California 95814, 

(http://www.arb.ca.gov/testmeth/vol3/M_429.pdf).

(13) The owner or operator may use alternative measurement 

methods approved by the Administrator following the procedures 

described in §63.7(f) of subpart A of this part.

(c) Compliance demonstration with the emission standards.

(1) Initial Performance Test. You must conduct an initial 

performance test for air pollution control devices or vent 

stacks subject to §63.1623(a), (b)(1) and (c) through (e) to 

demonstrate compliance with the applicable emission standards.

(2) Periodic Performance Test. (i) You must conduct annual 

particulate matter tests for wet scrubber air pollution control 

devices subject to §63.1623(a)(1) to demonstrate compliance with 

the applicable emission standards.

(ii) You must conduct particulate matter tests every five 

years for fabric filter air pollution control devices subject to 

§63.1623(a)(1) to demonstrate compliance with the applicable 
emission standards. 

(iii) You must conduct annual mercury performance tests for 

wet scrubber and fabric filter air pollution control devices or 

vent stacks subject to §63.1623(a)(2) to demonstrate compliance 

with the applicable emission standards.

(iv) You must conduct PAH performance tests for wet 

scrubber and fabric filter air pollution control devices or vent 

stacks subject to §63.1623(a)(3) to demonstrate compliance with 

the applicable emission standards.

(A) For furnaces producing silicomanganese, you must 

conduct a PAH performance test every five years for each furnace 

that produces silicomanganese subject to §63.1623(a)(3).

(B) For furnaces producing ferromanganese, you must conduct 

a PAH performance test every 3 months or 2,190 cumulative hours 

of ferromanganese production for each furnace subject to 

§63.1623 (a)(3). 

(C) If a furnace producing ferromanganese demonstrates 

compliance with four consecutive PAH tests, the owner/operator 

may petition the permitting authority to request reduced 

frequency of testing to demonstrate compliance with the PAH 

emission standards. However, this PAH compliance testing cannot 

be reduced to less than once per year. 
(v) You must conduct ongoing performance tests every five 

years for air pollution control devices or vent stacks subject 

to §63.1623(a)(4), (a)(5), (b)(1) and (c) through (e) to 

demonstrate compliance with the applicable emission standards.

(3) Compliance is demonstrated for all sources performing 

emissions tests if the average concentration for the three runs 

comprising the performance test does not exceed the standard.

(4) Operating Limits. You must establish parameter 

operating limits according to paragraphs (c)(4)(i) through 

(c)(4)(iv) of this section. Unless otherwise specified, 

compliance with each established operating limit shall be 

demonstrated for each 24-hour operating day.

(i) For a wet particulate matter scrubber, you must 

establish the minimum liquid flow rate and pressure drop as your 

operating limits during the three-run performance test. If you 

use a wet particulate matter scrubber and you conduct separate 

performance tests for particulate matter, you must establish one 

set of minimum liquid flow rate and pressure drop operating 

limits. If you conduct multiple performance tests, you must set 

the minimum liquid flow rate and pressure drop operating limits 

at the highest minimum hourly average values established during 

the performance tests.

(ii) For a wet acid gas scrubber, you must establish the 
minimum liquid flow rate and pH, as your operating limits during 

the three-run performance test. If you use a wet acid gas 

scrubber and you conduct separate performance tests for 

hydrochloric acid, you must establish one set of minimum liquid 

flow rate and pH operating limits. If you conduct multiple 

performance tests, you must set the minimum liquid flow rate and 

pH operating limits at the highest minimum hourly average values 

established during the performance tests.

(iii) For emission sources with fabric filters that choose 

to demonstrate continuous compliance through bag leak detection 

systems you must install a bag leak detection system according 

to the requirements in §63.1626(d) and you must set your 

operating limit such that the sum duration of bag leak detection 

system alarms does not exceed 5 percent of the process operating 

time during a 6-month period.

(iv) If you choose to demonstrate continuous compliance 

through a particulate matter CEMS, you must determine an 

operating limit (particulate matter concentration in mg/dscm) 

during performance testing for initial particulate matter 

compliance. The operating limit will be the average of the PM 

filterable results of the three Method 5 or Method 5D of 

Appendix A-3 of 40 CFR part 60 performance test runs. To 

determine continuous compliance, the hourly average PM 
concentrations will be averaged on a rolling 30 operating day 

basis. Each 30 operating day average will have to meet the PM 

operating limit.

(d) Compliance demonstration with shop building opacity 

standards.

(1)(i) If you are subject to §63.1623(b), you must conduct 

opacity observations of the shop building to demonstrate 

compliance with the applicable opacity standards according to 

§63.6(h)(5), which addresses conducting opacity or visible 

emission observations.

(ii) You must conduct the opacity observations according to 

ASTM D7520-13, for a period that includes at least one complete 

furnace process cycle for each furnace.

(iii) For a shop building that contains more than one 

furnace, you must conduct the opacity observations according to 

ASTM D7520-13, for a period that includes one tapping period 

from each furnace located in the shop building.

(iv) You must conduct the opacity observations according to 

ASTM D7520-13, for a one hour period that includes at least one 

pouring for each MOR located in the shop building.

(v) You must conduct the opacity observations at least once 

per week for each shop building containing one or more furnaces 
or MOR.

(vi) You may reduce the frequency of observations to once 

per month for each shop building that demonstrates compliance 

with the weekly 8% opacity limit for 26 consecutive complete 

observations that span a period of at least 26 weeks. Any 

monthly observation in excess of 8% opacity will return that 

shop building opacity observation to a weekly compliance 

schedule. You may reduce the frequency of observations again to 

once per month for each shop building that demonstrates 

compliance with the weekly 8% opacity limit after another 26 

consecutive complete observations that span a period of at least 

26 weeks. 

(2) You must determine shop building opacity operating 

parameters based on either monitoring data collected during the 

compliance demonstration or established in an engineering 

assessment. 

(i) If you choose to establish parameters based on the 

initial compliance demonstration, you must simultaneously 

monitor parameter values for one of the following: the capture 

system fan motor amperes and all capture system damper 

positions, the total volumetric flow rate to the air pollution 

control device and all capture system damper positions, or 

volumetric flow rate through each separately ducted hood that 
comprises the capture system. Subsequently you must monitor 

these parameters according to §63.1626(g) and ensure they remain 

within 10 percent of the value recorded during the compliant 

opacity readings.

(ii) If you choose to establish parameters based on an 

engineering assessment, then a design analysis shall include, 

for example, specifications, drawings, schematics and 

ventilation system diagrams prepared by the owner or operator or 

capture or control system manufacturer or vendor that describes 

the shop building opacity system ventilation design based on 

acceptable engineering texts. The design analysis shall address 

vent stream characteristics and ventilation system design 

operating parameters such as fan amps, damper position, flow 

rate and/or other specified parameters.

(iii) You may petition the Administrator to reestablish 

these parameter ranges whenever you can demonstrate to the 

Administrator's satisfaction that the electric arc furnace 

operating conditions upon which the parameter ranges were 

previously established are no longer applicable. The values of 

these parameter ranges determined during the most recent 

demonstration of compliance must be maintained at the 

appropriate level for each applicable period.
(3) You will demonstrate continuing compliance with the 

opacity standards by following the monitoring requirements 

specified in §63.1626(g) and the reporting and recordkeeping 

requirements specified in §63.1628(b)(5).

(e) Compliance demonstration with the operational and work 

practice standards

(1) Process fugitive emissions sources. You will 

demonstrate compliance by developing and maintaining a process 

fugitives ventilation plan, by reporting any deviations from the 

plan and by taking necessary corrective actions to correct 

deviations or deficiencies.

(2) Outdoor fugitive dust sources. You will demonstrate 

compliance by developing and maintaining an outdoor fugitive 

dust control plan, by reporting any deviations from the plan and 

by taking necessary corrective actions to correct deviations or 

deficiencies.

(3) Baghouses equipped with bag leak detection systems. You 

will demonstrate compliance with the bag leak detection system 

requirements by developing an analysis and supporting 

documentation demonstrating conformance with EPA guidance and 

specifications for bag leak detection systems in §60.57c(h) of 

this chapter.
§63.1626 What monitoring requirements must I meet?

(a) Baghouse Monitoring. You must prepare, and at all times 

operate according to, a standard operating procedures manual 

that describes in detail procedures for inspection, maintenance 

and bag leak detection and corrective action plans for all 

baghouses (fabric filters or cartridge filters) that are used to 

control process vents, process fugitive, or outdoor fugitive 

dust emissions from any source subject to the emissions 

standards in §63.1623. 

(b) You must submit the standard operating procedures 

manual for baghouses required by paragraph (a) of this section 

to the Administrator or delegated authority for review and 

approval.

(c) Unless the baghouse is equipped with a bag leak 

detection system or CEMS, the procedures that you specify in the 

standard operating procedures manual for inspections and routine 

maintenance must, at a minimum, include the requirements of 

paragraphs (c)(1) and (c)(2) of this section.

(1) You must observe the baghouse outlet on a daily basis 

for the presence of any visible emissions.

(2) In addition to the daily visible emissions observation, 

you must conduct the following activities:
(i) Weekly confirmation that dust is being removed from 

hoppers through visual inspection, or equivalent means of 

ensuring the proper functioning of removal mechanisms.

(ii) Daily check of compressed air supply for pulse-jet 

baghouses.

(iii) An appropriate methodology for monitoring cleaning 

cycles to ensure proper operation.

(iv) Monthly check of bag cleaning mechanisms for proper 

functioning through visual inspection or equivalent means.

(v) Quarterly visual check of bag tension on reverse air 

and shaker-type baghouses to ensure that the bags are not kinked 

(kneed or bent) or lying on their sides. Such checks are not 

required for shaker-type baghouses using self-tensioning (spring 

loaded) devices.

(vi) Quarterly confirmation of the physical integrity of 

the baghouse structure through visual inspection of the baghouse 

interior for air leaks.

(vii) Semiannual inspection of fans for wear, material 

buildup and corrosion through visual inspection, vibration 

detectors, or equivalent means.

(d) Bag leak detection system. 
(1) For each baghouse used to control emissions from an 

electric arc furnace, you must install, operate and maintain a 

bag leak detection system according to paragraphs (d)(2) through 

(d)(4) of this section, unless a system meeting the requirements 

of paragraph (o) of this section, for a CEMS and continuous 

emissions rate monitoring system, is installed for monitoring 

the concentration of particulate matter. You may choose to 

install, operate and maintain a bag leak detection system for 

any other baghouse in operation at the facility according to 

paragraphs (d)(2) through (d)(4) of this section.

(2) The procedures you specified in the standard operating 

procedures manual for baghouse maintenance must include, at a 

minimum, a preventative maintenance schedule that is consistent 

with the baghouse manufacturer's instructions for routine and 

long-term maintenance.

(3) Each bag leak detection system must meet the 

specifications and requirements in paragraphs (d)(3)(i) through 

(d)(3)(viii) of this section.

(i) The bag leak detection system must be certified by the 

manufacturer to be capable of detecting PM emissions at 

concentrations of 1.0 milligram per dry standard cubic meter 

(0.00044 grains per actual cubic foot) or less.

(ii) The bag leak detection system sensor must provide 
output of relative PM loadings. 

(iii) The bag leak detection system must be equipped with 

an alarm system that will alarm when an increase in relative 

particulate loadings is detected over a preset level.

(iv) You must install and operate the bag leak detection 

system in a manner consistent with the guidance provided in 

“Office of Air Quality Planning and Standards (OAQPS) Fabric 

Filter Bag Leak Detection Guidance” EPA-454/R-98-015, September 

1997 (incorporated by reference) and the manufacturer's written 

specifications and recommendations for installation, operation 

and adjustment of the system.

(v) The initial adjustment of the system must, at a 

minimum, consist of establishing the baseline output by 

adjusting the sensitivity (range) and the averaging period of 

the device and establishing the alarm set points and the alarm 

delay time.

(vi) Following initial adjustment, you must not adjust the 

sensitivity or range, averaging period, alarm set points, or 

alarm delay time, except as detailed in the approved standard 

operating procedures manual required under paragraph (a) of this 

section. You cannot increase the sensitivity by more than 100 

percent or decrease the sensitivity by more than 50 percent over 

a 365-day period unless such adjustment follows a complete 
baghouse inspection that demonstrates that the baghouse is in 

good operating condition.

(vii) You must install the bag leak detector downstream of 

the baghouse.

(viii) Where multiple detectors are required, the system's 

instrumentation and alarm may be shared among detectors.

(4) You must include in the standard operating procedures 

manual required by paragraph (a) of this section a corrective 

action plan that specifies the procedures to be followed in the 

case of a bag leak detection system alarm. The corrective action 

plan must include, at a minimum, the procedures that you will 

use to determine and record the time and cause of the alarm as 

well as the corrective actions taken to minimize emissions as 

specified in paragraphs (d)(4)(i) and (d)(4)(ii) of this 

section.

(i) The procedures used to determine the cause of the alarm 

must be initiated within 30 minutes of the alarm.

(ii) The cause of the alarm must be alleviated by taking 

the necessary corrective action(s) that may include, but not be 

limited to, those listed in paragraphs (d)(4)(ii)(A) through 

(d)(4)(ii)(F) of this section.

(A) Inspecting the baghouse for air leaks, torn or broken 
filter elements, or any other malfunction that may cause an 

increase in emissions.

(B) Sealing off defective bags or filter media.

(C) Replacing defective bags or filter media, or otherwise 

repairing the control device.

(D) Sealing off a defective baghouse compartment.

(E) Cleaning the bag leak detection system probe, or 

otherwise repairing the bag leak detection system.

(F) Shutting down the process producing the particulate 

emissions.

(e) If you use a wet particulate matter scrubber, you must 

collect the pressure drop and liquid flow rate monitoring system 

data according to §63.1628, reduce the data to 24-hour block 

averages and maintain the 24-hour average pressure drop and 

liquid flow-rate at or above the operating limits established 

during the performance test according to §63.1625(c)(4)(i).

(f) If you use curtains or partitions to prevent process 

fugitive emissions from escaping the area around the process 

fugitive emission source or other parts of the building, you 

must perform quarterly inspections of the physical condition of 

these curtains or partitions to determine if there are any tears 

or openings.
(g) Shop building opacity. In order to demonstrate 

continuous compliance with the opacity standards in §63.1623, 

you must comply with the requirements §63.1625(d)(1) and one of 

the monitoring options in paragraphs (g)(1) or (g)(2) of this 

section. The selected option must be consistent with that 

selected during the initial performance test described in 

§63.1625(d)(2). Alternatively, you may use the provisions of 

§63.8(f) to request approval to use an alternative monitoring 

method.

(1) If you choose to establish operating parameters during 

the compliance test as specified in §63.1625(d)(2)(i), you must 

meet one of the following requirements.

(i) Check and record the control system fan motor amperes 

and capture system damper positions once per shift.

(ii) Install, calibrate and maintain a monitoring device 

that continuously records the volumetric flow rate through each 

separately ducted hood.

(iii) Install, calibrate and maintain a monitoring device 

that continuously records the volumetric flow rate at the inlet 

of the air pollution control device and check and record the 

capture system damper positions once per shift.

(2) If you choose to establish operating parameters during 
the compliance test as specified in §63.1625(d)(2)(ii), you must 

monitor the selected parameter(s) on a frequency specified in 

the assessment and according to a method specified in the 

engineering assessment

(3) All flow rate monitoring devices must meet the 

following requirements:

(i) Be installed in an appropriate location in the exhaust 

duct such that reproducible flow rate monitoring will result.

(ii) Have an accuracy ±10 percent over its normal operating 

range and be calibrated according to the manufacturer's 

instructions.

(4) The Administrator may require you to demonstrate the 

accuracy of the monitoring device(s) relative to Methods 1 and 2 

of Appendix A-1 of part 60 of this chapter.

(5) Failure to maintain the appropriate capture system 

parameters (e.g., fan motor amperes, flow rate and/or damper 

positions) establishes the need to initiate corrective action as 

soon as practicable after the monitoring excursion in order to 

minimize excess emissions.

(h) Furnace Capture System. You must perform quarterly 

(once every three months) inspections of the furnace fugitive 

capture system equipment to ensure that the hood locations have 
not been changed or obstructed because of contact with cranes or 

ladles, quarterly inspections of the physical condition of hoods 

and ductwork to the control device to determine if there are any 

openings or leaks in the ductwork, quarterly inspections of the 

hoods and ductwork to determine if there are any flow 

constrictions in ductwork due to dents or accumulated dust and 

quarterly examinations of the operational status of flow rate 

controllers (pressure sensors, dampers, damper switches, etc.) 

to ensure they are operating correctly. Any deficiencies must be 

recorded and proper maintenance and repairs performed.

(i) Requirements for sources using CMS. If you demonstrate 

compliance with any applicable emissions limit through use of a 

continuous monitoring system (CMS), where a CMS includes a 

continuous parameter monitoring system (CPMS) as well as a 

continuous emissions monitoring system (CEMS), you must develop 

a site-specific monitoring plan and submit this site-specific 

monitoring plan, if requested, at least 60 days before your 

initial performance evaluation (where applicable) of your CMS. 

Your site-specific monitoring plan must address the monitoring 

system design, data collection and the quality assurance and 

quality control elements outlined in this paragraph and in 

§63.8(d). You must install, operate and maintain each CMS 

according to the procedures in your approved site-specific 

monitoring plan. Using the process described in §63.8(f)(4), you 
may request approval of monitoring system quality assurance and 

quality control procedures alternative to those specified in 

paragraphs (i)(1) through (i)(6) of this section in your sitespecific monitoring plan.

(1) The performance criteria and design specifications for 

the monitoring system equipment, including the sample interface, 

detector signal analyzer and data acquisition and calculations;

(2) Sampling interface location such that the monitoring 

system will provide representative measurements; 

(3) Equipment performance checks, system accuracy audits, 

or other audit procedures;

(4) Ongoing operation and maintenance procedures in 

accordance with the general requirements of §63.8(c)(1) and 

(c)(3); 

(5) Conditions that define a continuous monitoring system 

that is out of control consistent with §63.8(c)(7)(i) and for 

responding to out of control periods consistent with 

§63.8(c)(7)(ii) and (c)(8) or Table 1 to this subpart, as 

applicable; and

(6) Ongoing recordkeeping and reporting procedures in 

accordance with provisions in §63.10(c), (e)(1) and (e)(2)(i) 

and Table 1 to this subpart, as applicable.
(j) If you have an operating limit that requires the use of 

a CPMS, you must install, operate and maintain each continuous 

parameter monitoring system according to the procedures in 

paragraphs (j)(1) through (j)(7) of this section.

(1) The CPMS must complete a minimum of one cycle of 

operation for each successive 15-minute period. You must have a 

minimum of four successive cycles of operation to have a valid 

hour of data.

(2) Except for periods of monitoring system malfunctions, 

repairs associated with monitoring system malfunctions and 

required monitoring system quality assurance or quality control 

activities (including, as applicable, system accuracy audits and 

required zero and span adjustments), you must operate the CMS at 

all times the affected source is operating. A monitoring system 

malfunction is any sudden, infrequent, not reasonably 

preventable failure of the monitoring system to provide valid 

data. Monitoring system failures that are caused in part by poor 

maintenance or careless operation are not malfunctions. You are 

required to complete monitoring system repairs in response to 

monitoring system malfunctions and to return the monitoring 

system to operation as expeditiously as practicable. 

(3) You may not use data recorded during monitoring system 

malfunctions, repairs associated with monitoring system 
malfunctions, or required monitoring system quality assurance or 

control activities in calculations used to report emissions or 

operating levels. You must use all the data collected during all 

other required data collection periods in assessing the 

operation of the control device and associated control system. 

(4) Except for periods of monitoring system malfunctions, 

repairs associated with monitoring system malfunctions and 

required quality monitoring system quality assurance or quality 

control activities (including, as applicable, system accuracy 

audits and required zero and span adjustments), failure to 

collect required data is a deviation of the monitoring 

requirements.

(5) You must conduct other CPMS equipment performance 

checks, system accuracy audits, or other audit procedures 

specified in your site-specific monitoring plan at least once 

every 12 months.

(6) You must conduct a performance evaluation of each CPMS 

in accordance with your site-specific monitoring plan.

(7) You must record the results of each inspection, 

calibration and validation check.

(k) CPMS for measuring gaseous flow.

(1) Use a flow sensor with a measurement sensitivity of 5 
percent of the flow rate or 10 cubic feet per minute, whichever 

is greater,

(2) Check all mechanical connections for leakage at least 

every month and 

(3) Perform a visual inspection at least every 3 months of 

all components of the flow CPMS for physical and operational 

integrity and all electrical connections for oxidation and 

galvanic corrosion if your flow CPMS is not equipped with a 

redundant flow sensor. 

(l) CPMS for measuring liquid flow.

(1) Use a flow sensor with a measurement sensitivity of 2 

percent of the liquid flow rate and

(2) Reduce swirling flow or abnormal velocity distributions 

due to upstream and downstream disturbances.

(m) CPMS for measuring pressure.

(1) Minimize or eliminate pulsating pressure, vibration and 

internal and external corrosion and

(2) Use a gauge with a minimum tolerance of 1.27 

centimeters of water or a transducer with a minimum tolerance of 

1 percent of the pressure range.

(3) Perform checks at least once each process operating day 
to ensure pressure measurements are not obstructed (e.g., check 

for pressure tap pluggage daily).

(n) CPMS for measuring pH.

(1) Ensure the sample is properly mixed and representative 

of the fluid to be measured.

(2) Check the pH meter's calibration on at least two points 

every eight hours of process operation.

(o) Particulate Matter CEMS. If you are using a CEMS to 

measure particulate matter emissions to meet requirements of 

this subpart, you must install, certify, operate and maintain 

the particulate matter CEMS as specified in paragraphs (o)(1) 

through (o)(4) of this section.

(1) You must conduct a performance evaluation of the PM 

CEMS according to the applicable requirements of §60.13 and 

Performance Specification 11 at 40 CFR part 60, Appendix B of 

this chapter.

(2) During each PM correlation testing run of the CEMS 

required by Performance Specification 11 at 40 CFR part 60, 

Appendix B of this chapter, PM and oxygen (or carbon dioxide) 

collect data concurrently (or within a 30-to 60-minute period) 

by both the CEMS and by conducting performance tests using 

Method 5 or 5D at 40 CFR part 60, Appendix A–3 or Method 17 at 
40 CFR part 60, Appendix A–6 of this chapter.

(3) Perform quarterly accuracy determinations and daily 

calibration drift tests in accordance with Procedure 2 at 40 CFR 

part 60, Appendix F of this chapter. Relative Response Audits 

must be performed annually and Response Correlation Audits must 

be performed every three years.

(4) Within 60 days after the date of completing each CEMS 

relative accuracy test audit or performance test conducted to 

demonstrate compliance with this subpart, you must submit the 

relative accuracy test audit data and the results of the 

performance test in the as specified in §63.1628(e).

§63.1627 What notification requirements must I meet?

(a) You must comply with all of the notification 

requirements of §63.9 of subpart A, General Provisions. 

Electronic notifications are encouraged when possible. 

(b)(1) You must submit the process fugitive ventilation 

plan required under §63.1624(a), the outdoor fugitive dust 

control plan required under §63.1624(b), the site-specific 

monitoring plan for CMS required under §63.1626(i) and the 

standard operating procedures manual for baghouses required 

under §63.1626(a) to the Administrator or delegated authority 

along with a notification that you are seeking review and 
approval of these plans and procedures. You must submit this 

notification no later than [insert date 1 year after date of 

publication in the Federal Register]. For sources that commenced 

construction or reconstruction after [insert date of publication 

in the Federal Register], you must submit this notification no 

later than 180 days before startup of the constructed or 

reconstructed ferromanganese or silicomanganese production 

facility. For an affected source that has received a 

construction permit from the Administrator or delegated 

authority on or before [insert date of publication in the 

Federal Register], you must submit this notification no later 

than [insert date 1 year after date of publication in the 

Federal Register].

(2) The plans and procedures documents submitted as 

required under paragraph (b)(1) of this section must be 

submitted to the Administrator in electronic format for review 

and approval of the initial submittal and whenever an update is 

made to the procedure.

§63.1628 What recordkeeping and reporting requirements must I 

meet?

(a) You must comply with all of the recordkeeping and 

reporting requirements specified in §63.10 of the General 

Provisions that are referenced in Table 1 to this subpart.
(1) Records must be maintained in a form suitable and 

readily available for expeditious review, according to 

§63.10(b)(1). However, electronic recordkeeping and reporting is 

encouraged and required for some records and reports. 

(2) Records must be kept on site for at least two years 

after the date of occurrence, measurement, maintenance, 

corrective action, report, or record, according to §63.10(b)(1). 

(b) You must maintain, for a period of five years, records 

of the information listed in paragraphs (b)(1) through (b)(13) 

of this section.

(1) Electronic records of the bag leak detection system 

output.

(2) An identification of the date and time of all bag leak 

detection system alarms, the time that procedures to determine 

the cause of the alarm were initiated, the cause of the alarm, 

an explanation of the corrective actions taken and the date and 

time the cause of the alarm was corrected. 

(3) All records of inspections and maintenance activities 

required under §63.1626(c) as part of the practices described in 

the standard operating procedures manual for baghouses required 

under §63.1626(a).

(4) Electronic records of the pressure drop and water flow 
rate values for wet scrubbers used to control particulate matter 

emissions as required in §63.1626(e), identification of periods 

when the 1-hour average pressure drop and water flow rate values 

are below the established minimum operating limits and an 

explanation of the corrective actions taken.

(5) Electronic records of the shop building capture system 

monitoring required under §63.1626(g)(1) and (g)(2), as 

applicable, or identification of periods when the capture system 

parameters were not maintained and an explanation of the 

corrective actions taken.

(6) Records of the results of quarterly inspections of the 

furnace capture system required under §63.1626(h).

(7) Electronic records of the continuous flow monitors or 

pressure monitors required under §63.1626(i) and (j) and an 

identification of periods when the flow rate or pressure was not 

maintained as required in §63.1626(e).

(8) Electronic records of the output of any CEMS installed 

to monitor particulate matter emissions meeting the requirements 

of §63.1626(i)

(9) Records of the occurrence and duration of each startup 

and/or shutdown.

(10) Records of the occurrence and duration of each 
malfunction of operation (i.e., process equipment) or the air 

pollution control equipment and monitoring equipment. 

(11) Records that explain the periods when the procedures 

outlined in the process fugitives ventilation plan required 

under §63.1624(a), the fugitives dust control plan required 

under §63.1624(b), the site-specific monitoring plan for CMS 

required under §63.1626(i) and the standard operating procedures 

manual for baghouses required under §63.1626(a).

(c) You must comply with all of the reporting requirements 

specified in §63.10 of the General Provisions that are 

referenced in Table 1 to this subpart. 

(1) You must submit reports no less frequently than 

specified under §63.10(e)(3) of the General Provisions. 

(2) Once a source reports a violation of the standard or 

excess emissions, you must follow the reporting format required 

under §63.10(e)(3) until a request to reduce reporting frequency 

is approved by the Administrator.

(d) In addition to the information required under the 

applicable sections of §63.10, you must include in the reports 

required under paragraph (c) of this section the information 

specified in paragraphs (d)(1) through (d)(7) of this section.

(1) Reports that identify and explain the periods when the 
procedures outlined in the process fugitives ventilation plan 

required under §63.1624(a), the fugitives dust control plan 

required under §63.1624(b), the site-specific monitoring plan 

for CMS required under §63.1626(i) and the standard operating 

procedures manual for baghouses required under §63.1626(a).

(2) Reports that identify the periods when the average 

hourly pressure drop or flow rate of wet scrubbers used to 

control particulate emissions dropped below the levels 

established in §63.1626(e) and an explanation of the corrective 

actions taken.

(3) Bag leak detection system. Reports including the 

following information:

(i) Records of all alarms.

(ii) Description of the actions taken following each bag 

leak detection system alarm.

(4) Reports of the shop building capture system monitoring 

required under §63.1626(g)(1) and (g)(2), as applicable, 

identification of periods when the capture system parameters 

were not maintained and an explanation of the corrective actions 

taken.

(5) Reports of the results of quarterly inspections of the 

furnace capture system required under §63.1626(h).
(6) Reports of the CPMS required under §63.1626, an 

identification of periods when the monitored parameters were not 

maintained as required in §63.1626 and corrective actions taken.

(7) If a malfunction occurred during the reporting period, 

the report must include the number, duration and a brief 

description for each type of malfunction that occurred during 

the reporting period and caused or may have caused any 

applicable emissions limitation to be exceeded. The report must 

also include a description of actions taken by the owner or 

operator during a malfunction of an affected source to minimize 

emissions in accordance with §63.1623(f), including actions 

taken to correct a malfunction. 

(e) Within 60 days after the date of completing each CEMS 

relative accuracy test audit or performance test conducted to 

demonstrate compliance with this subpart, you must submit the 

relative accuracy test audit data and the results of the 

performance test in the method specified by paragraphs (e)(1) 

through (e)(2) of this section. The results of the performance 

test must contain the information listed in paragraph (e)(2) of 

this section.

(1)(i)Within 60 days after the date of completing each 

performance test (as defined in §63.2) required by this subpart, 

you must submit the results of the performance tests, including 
any associated fuel analyses, following the procedure specified 

in either paragraph (1)(i)(A) or (1)(i)(B) of this section.

(A) For data collected using test methods supported by the 

EPA’s Electronic Reporting Tool (ERT) as listed on the EPA’s ERT 

website (http://www.epa.gov/ttn/chief/ert/index.html), you must 

submit the results of the performance test to the EPA via the 

Compliance and Emissions Data Reporting Interface (CEDRI). 

(CEDRI can be accessed through the EPA’s Central Data Exchange 

(CDX) (http://cdx.epa.gov/epa_home.asp).) Performance test data 

must be submitted in a file format generated through the use of 

the EPA’s ERT. Alternatively, you may submit performance test 

data in an electronic file format consistent with the extensible 

markup language (XML) schema listed on the EPA’s ERT website, 

once the XML schema is available. If you claim that some of the

performance test information being submitted is confidential 

business information (CBI), you must submit a complete file 

generated through the use of the EPA’s ERT or an alternate 

electronic file consistent with the XML schema listed on the 

EPA’s ERT website, including information claimed to be CBI, on a 

compact disc, flash drive or other commonly used electronic 

storage media to the EPA. The electronic media must be clearly 

marked as CBI and mailed to U.S. EPA/OAPQS/CORE CBI Office, 

Attention: WebFIRE Administrator, MD C404-02, 4930 Old Page 

Rd., Durham, NC 27703. The same ERT or alternate file with the 
CBI omitted must be submitted to the EPA via the EPA’s CDX as 

described earlier in this paragraph.

(B) For data collected using test methods that are not 

supported by the EPA’s ERT as listed on the EPA’s ERT website, 

you must submit the results of the performance test to the 

Administrator at the appropriate address listed in §63.13.

(ii) Within 60 days after the date of completing each CEMS 

performance evaluation (as defined in §63.2), you must submit 

the results of the performance evaluation following the 

procedure specified in either paragraph (b)(1) or (b)(2) of this 

section. 

(A) For performance evaluations of continuous monitoring 

systems measuring relative accuracy test audit (RATA) pollutants 

that are supported by the EPA’s ERT as listed on the EPA’s ERT 

website, you must submit the results of the performance 

evaluation to the EPA via the CEDRI. (CEDRI can be accessed 

through the EPA’s CDX.) Performance evaluation data must be 

submitted in a file format generated through the use of the 

EPA’s ERT. Alternatively, you may submit performance evaluation 

data in an electronic file format consistent with the extensible 

markup language (XML) schema listed on the EPA’s ERT website, 

once the XML schema is available. If you claim that some of the 

performance evaluation information being transmitted is CBI, you 

must submit a complete file generated through the use of the 
EPA’s ERT or an alternate electronic file consistent with the 

XML schema listed on the EPA’s ERT website, including 

information claimed to be CBI, on a compact disc, flash drive or 

other commonly used electronic storage media to the EPA. The 

electronic storage media must be clearly marked as CBI and 

mailed to U.S. EPA/OAPQS/CORE CBI Office, Attention: WebFIRE 

Administrator, MD C404-02, 4930 Old Page Rd., Durham, NC 27703. 

The same ERT or alternate file with the CBI omitted must be 

submitted to the EPA via the EPA’s CDX as described earlier in 

this paragraph.

(B) For any performance evaluations of continuous 

monitoring systems measuring RATA pollutants that are not 

supported by the EPA’s ERT as listed on the EPA’s ERT website, 

you must submit the results of the performance evaluation to the 

Administrator at the appropriate address listed in §63.13.

(2) The results of a performance test shall include the 

purpose of the test; a brief process description; a complete 

unit description, including a description of feed streams and 

control devices; sampling site description; pollutants measured; 

description of sampling and analysis procedures and any 

modifications to standard procedures; quality assurance 

procedures; record of operating conditions, including operating 

parameters for which limits are being set, during the test; 
record of preparation of standards; record of calibrations; raw 

data sheets for field sampling; raw data sheets for field and

laboratory analyses; chain-of-custody documentation; explanation 

of laboratory data qualifiers; example calculations of all 

applicable stack gas parameters, emission rates, percent 

reduction rates and analytical results, as applicable; and any 

other information required by the test method, a relevant 

standard, or the Administrator.

§63.1629 Who implements and enforces this subpart?

(a) This subpart can be implemented and enforced by the 

U.S. EPA, or a delegated authority such as the applicable state, 

local, or tribal agency. If the U.S. EPA Administrator has 

delegated authority to a state, local, or tribal agency, then 

that agency, in addition to the U.S. EPA, has the authority to 

implement and enforce this subpart. Contact the applicable U.S. 

EPA Regional Office to find out if this subpart is delegated to 

a state, local, or tribal agency.

(b) In delegating implementation and enforcement authority 

of this subpart to a state, local, or tribal agency under 

subpart E of this part, the authorities contained in paragraph 

(c) of this section are retained by the Administrator of U.S. 

EPA and cannot be transferred to the state, local, or tribal 

agency.
(c) The authorities that cannot be delegated to state, 

local, or tribal agencies are as specified in paragraphs (c)(1) 

through (c)(4) of this section.

(1) Approval of alternatives to requirements in §§63.1620 

and 63.1621 and 63.1623 and 63.1624.

(2) Approval of major alternatives to test methods under 

§63.7(e)(2)(ii) and (f), as defined in §63.90 and as required in 

this subpart.

(3) Approval of major alternatives to monitoring under 

§63.8(f), as defined in §63.90 and as required in this subpart.

(4) Approval of major alternatives to recordkeeping and 

reporting under §63.10(f), as defined in §63.90 and as required 

in this subpart.

§63.1650 Applicability and compliance dates.

(a) This subpart applies to all new and existing 

ferromanganese and silicomanganese production facilities that 

manufacture ferromanganese or silicomanganese and are major 

sources or are co-located at major sources of hazardous air 

pollutant emissions.

(b) The following sources at a ferromanganese and 

silicomanganese production facility are subject to this subpart:
(1) Open submerged arc furnaces with a furnace power input 

of 22 MW or less when producing ferromanganese.

(2) Open submerged arc furnaces with a furnace power input 

greater than 22 MW when producing ferromanganese.

(3) Open submerged arc furnaces with a furnace power input 

greater than 25 MW when producing silicomanganese.

(4) Open submerged arc furnaces with a furnace power input 

of 25 MW or less when producing silicomanganese.

(5) Semi-sealed submerged arc furnaces when producing 

ferromanganese.

(6) Metal oxygen refining (MOR) process.

(7) Crushing and screening operations.

(8) Fugitive dust sources.

(c) A new affected source is one for which construction or 

reconstruction commenced after August 4, 1998.

(d) Table 1 to this subpart specifies the provisions of 

subpart A of this part that apply to owners and operators of 

ferroalloy production facilities subject to this subpart.The 

following table specifies which provisions of subpart A of this 

part apply to owners and operators of ferromanganese and 

silicomanganese production facilities subject to this subpart:
GENERAL PROVISIONS APPLICABILITY TO SUBPART XXX

Reference, 

Subpart A 

General 

Provisions

Applies to 

Subpart XXX, 

§§63.1620-

63.1679 Comment

63.1-63.5 Yes

63.6(a)-(g), 

(i)-(j)

Yes

63.6(h)(1)-

(h)(6), 

(h)(8)-(h)(9)

Yes

63.7(h)(7) No §63.6(h)(7), use of continuous 

opacity monitoring system, not 

applicable.

63.7 Yes

63.8 Yes

63.9 Yes Notification of performance test 

results changed to a 30-day 

notification period.

63.10 Yes Allow changes in dates by which 

periodic reports are submitted by 

mutual agreement between the owner 

or operator and the State to occur 

any time after the source's 

compliance date.

63.11 No Flares will not be used to comply 

with the emission limits.

63.12-63.15 Yes

(e) Compliance dates. 

(1) [Reserved]Each owner or operator of an existing 

affected source must comply with the requirements of this 

subpart no later than November 21, 2001.
(2) Each owner or operator of a new or reconstructed 

affected source that commences construction or reconstruction 

after August 4, 1998 and before [INSERT DATE OF PUBLICATION OF 

THE PROPOSED RULE IN THE FEDERAL REGISTER], must comply with the 

requirements of this subpart by May 20,1999 or upon startup of 

operations, whichever is later.Each owner or operator of a new 

or reconstructed affected source that commences construction or 

reconstruction after August 4, 1998, must comply with the 

requirements of this subpart by May 20, 1999 or upon startup of 

operations, whichever is later.

§63.1651 Definitions.

Terms in this subpart are defined in the Clean Air Act (Act), in 

subpart A of this part, or in this section as follows:

Bag leak detection system means a system that is capable of 

continuously monitoring particulate matter (dust) loadings in 

the exhaust of a baghouse in order to detect bag leaks and other 

upset conditions. A bag leak detection system includes, but is 

not limited to, an instrument that operates on triboelectric, 

light scattering, light transmittance, or other effect to 

continuously monitor relative particulate matter loadings.

Capture system means the equipment (including hoods, ducts, 

fans, dampers, etc.) used to capture or transport particulate 

matter generated by an affected submerged arc furnace.
Casting means the period of time from when molten ferroalloy 

falls from the furnace tapping runner into the ladle until 

pouring into molds is completed. This includes the following 

operations: ladle filling, pouring alloy from one ladle to 

another, slag separation, slag removal, and ladle transfer by 

crane, truck, or other conveyance.

Crushing and screening equipment means the crushers, 

grinders, mills, screens and conveying systems used to crush, 

size, and prepare for packing manganese-containing materials, 

including raw materials, intermediate products, and final 

products.

Fugitive dust source means a stationary source from which 

manganese-bearing particles are discharged to the atmosphere due 

to wind or mechanical inducement such as vehicle traffic. 

Fugitive dust sources include plant roadways, yard areas, and 

outdoor material storage and transfer operations.

Furnace power input means the resistive electrical power 

consumption of a submerged arc furnace, expressed as megawatts 

(MW).

Malfunction means any sudden, infrequent, and not 

reasonably preventable failure of air pollution control 

equipment, process equipment, or a process to operate in a 

normal or usual manner which causes, or has the potential to 
cause, the emission limitations in an applicable standard to be 

exceeded. Failures caused in part by poor maintenance or 

careless operation are not malfunctions.

Metal oxygen refining (MOR) process means the reduction of 

the carbon content of ferromanganese through the use of oxygen.

Open submerged arc furnace means an electric submerged arc 

furnace that is equipped with a canopy hood above the furnace to 

collect primary emissions.

Operating time means the period of time in hours that the 

affected source is in operation beginning at a startup and 

ending at the next shutdown.

Plant roadway means any area at a ferromanganese and 

silicomanganese production facility that is subject to plant 

mobile equipment, such as fork lifts, front end loaders, or 

trucks, carrying manganese-bearing materials. Excluded from this 

definition are employee and visitor parking areas, provided they 

are not subject to traffic by plant mobile equipment.

Primary emissions means gases and emissions collected by 

hoods and ductwork located above an open furnace or under the 

cover of a semi-closed or sealed furnace.
Sealed submerged arc furnace means an electric submerged 

arc furnace equipped with a total enclosure or cover from which 

primary emissions are evacuated directly.

Semi-closed submerged arc furnace means an electric 

submerged arc furnace equipped with a partially sealed cover 

over the furnace. This cover is equipped with openings to allow 

penetration of the electrodes into the furnace. Mix is 

introduced into the furnace around the electrode holes forming a 

partial seal between the electrodes and the cover. Furnace 

emissions generated under the cover are ducted to an emission 

control device. Emissions that escape the cover are collected 

and vented through stacks directly to the atmosphere.

Shop means the building which houses one or more submerged 

arc furnaces.

Shutdown means the cessation of operation of an affected 

source for any purpose.

Startup means the setting in operation of an affected 

source for any purpose.

Submerged arc furnace means any furnace wherein electrical 

energy is converted to heat energy by transmission of current 

between electrodes partially submerged in the furnace charge. 

The furnace may be of an open, semi-sealed, or sealed design.
Tapping emissions means a source of air pollutant emissions 

that occur during the process of removing the molten product 

from the furnace.

Tapping period means the time from when a tap hole is 

opened until the time a tap hole is closed.

§63.1652 Emission standards.

(a) New and reconstructed submerged arc furnaces. No owner

or operator shall cause to be discharged into the atmosphere 

from any new or reconstructed submerged arc furnace exhaust 

gases (including primary and tapping) containing particulate 

matter in excess of one of the following:

(1) 0.23 kilograms per hour per megawatt (kg/hr/MW) (0.51 

pounds per hour per megawatt [lb/hr/MW]), or

(2) 35 milligrams per dry standard cubic meter (mg/dscm) 

(0.015 grains per dry standard cubic foot [gr/dscf]).

(b) Existing open submerged arc furnaces. No owner or 

operator shall cause to be discharged into the atmosphere from 

any existing open submerged arc furnace exhaust gases (including 

primary and tapping) containing particulate matter in excess of 

one of the following:
(1) 9.8 kilograms per hour (kg/hr) (21.7 pounds per hour 

(lb/hr)) when producing ferromanganese in an open furnace 

operating at a furnace power input of 22 MW or less; or

(2) 13.5 kg/hr (29.8 lb/hr) when producing ferromanganese 

in an open furnace operating at a furnace power input greater 

than 22 MW; or

(3) 16.3 kg/hr (35.9 lb/hr) when producing silicomanganese 

in an open furnace operating at a furnace power input greater 

than 25 MW; or

(4) 12.3 kg/hr (27.2 lb/hr) when producing silicomanganese 

in an open furnace operating at a furnace power input of 25 MW 

or less. 

(c) Existing semi-sealed submerged arc furnaces. No owner 

or operator shall cause to be discharged into the atmosphere 

from any existing semi-sealed submerged arc furnace exhaust 

gases (including primary, tapping, and vent stacks) containing 

particulate matter in excess of 11.2 kg/hr (24.7 lb/hr) when 

producing ferromanganese.

(d) MOR process. No owner or operator shall cause to be 

discharged into the atmosphere from any new, reconstructed, or 

existing MOR process exhaust gases containing particulate matter 

in excess of 69 mg/dscm (0.03 gr/dscf).
(e) Crushing and screening equipment—(1) New and 

reconstructed equipment. No owner or operator shall cause to be 

discharged into the atmosphere from any new or reconstructed 

piece of equipment associated with crushing and screening 

exhaust gases containing particulate matter in excess of 50 

mg/dscm (0.022 gr/dscf).

(2) Existing equipment. No owner or operator shall cause to 

be discharged into the atmosphere from any existing piece of 

equipment associated with crushing and screening exhaust gases 

containing particulate matter in excess of 69 (mg/dscm) (0.03 

gr/dscf).

(f) At all times, you must operate and maintain any 

affected source, including associated air pollution control 

equipment and monitoring equipment, in a manner consistent with 

safety and good air pollution control practices for minimizing 

emissions. Determination of whether such operation and 

maintenance procedures are being used will be based on 

information available to the Administrator that may include, but 

is not limited to, monitoring results, review of operation and 

maintenance procedures, review of operation and maintenance 

records and inspection of the source.

§63.1653 Opacity standards.
No owner or operator shall cause emissions exiting from a 

shop due solely to operations of any affected submerged arc 

furnace, to exceed 20 percent opacity for more than one 6-minute 

period during any performance test, with the following 

exceptions:

(a) Visible particulate emissions from a shop due solely to 

operation of a semi-closed submerged arc furnace, may exceed 20 

percent opacity, measured as a 6-minute average, one time during 

any performance test, so long as the emissions never exceed 60 

percent opacity, measured as a 6-minute average.

(b) Blowing taps, poling and oxygen lancing of the tap 

hole; burndowns associated with electrode measurements; and 

maintenance activities associated with submerged arc furnaces 

and casting operations are exempt from the opacity standards 

specified in this section.

§63.1654 Operational and work practice standards.

(a) Fugitive dust sources. 

(1) Each owner or operator of an affected ferromanganese 

and silicomanganese production facility must prepare, and at all 

times operate according to, a fugitive dust control plan that 

describes in detail the measures that will be put in place to 
control fugitive dust emissions from the individual fugitive 

dust sources at the facility.

(2) The owner or operator must submit a copy of the 

fugitive dust control plan to the designated permitting 

authority on or before the applicable compliance date for the 

affected source as specified in §63.1650(e). The requirement for 

the owner or operator to operate the facility according to a 

written fugitive dust control plan must be incorporated in the 

operating permit for the facility that is issued by the 

designated permitting authority under part 70 of this chapter.

(3) The owner or operator may use existing manuals that 

describe the measures in place to control fugitive dust sources 

required as part of a State implementation plan or other 

federally enforceable requirement for particulate matter to 

satisfy the requirements of paragraph (a)(1) of this section.

(b) Baghouses equipped with bag leak detection systems. The 

owner or operator of a new or reconstructed submerged arc 

furnace must install and continuously operate a bag leak 

detection system if the furnace's primary and/or tapping 

emissions are ducted to a negative pressure baghouse or to a 

positive pressure baghouse equipped with a stack. The owner or 

operator must maintain and operate each baghouse such that the 

following conditions are met:
(1) The alarm on the system does not sound for more than 5 

percent of the total operating time in a 6-month reporting 

period.

(2) A record is made of the date and time of each alarm and 

procedures to determine the cause of the alarm are initiated 

within 1 hour of the alarm according to the plan for corrective 

action required under §63.1657(a)(7).

§63.1655 Maintenance requirements.

(a) The owner or operator of an affected source must comply 

with the requirements of §63.6(e) of subpart A.

(b)(1) The owner or operator must develop and implement a 

written maintenance plan for each air pollution control device 

associated with submerged arc furnaces, metal oxygen refining 

processes, and crushing and screening operations subject to the 

provisions of this part. The owner or operator must keep the 

maintenance plan on record and available for the Administrator's 

inspection for the life of the air pollution control device or 

until the affected source is no longer subject to the provisions 

of this part.

(2) To satisfy the requirement to develop maintenance 

plans, the owner or operator may use the affected source's 

standard operating procedures (SOP) manual or other plan, 
provided the alternative plan meets the requirements of this 

paragraph and is made available for inspection when requested by 

the Administrator.

(c) The procedures specified in the maintenance plan must 

include a preventive maintenance schedule that is consistent 

with good air pollution control practices for minimizing 

emissions and, for baghouses, ensure that the requirements 

specified in §63.1657(a) are met.

(d) The owner or operator must perform monthly inspections 

of the equipment that is important to the performance of the 

furnace capture system. This inspection must include an 

examination of the physical condition of the equipment, suitable 

for detecting holes in ductwork or hoods, flow constrictions in 

ductwork due to dents or accumulated dust, and operational 

status of flow rate controllers (pressure sensors, dampers, 

damper switches, etc.). Any deficiencies must be recorded and 

proper maintenance and repairs performed.

§63.1656 Performance testing, test methods, and compliance 

demonstrations.

(a) Performance testing. (1) All performance tests must be 

conducted according to the requirements in §63.7 of subpart A.
(2) Each performance test must consist of three separate 

and complete runs using the applicable test methods.

(3) Each run must be conducted under conditions that are 

representative of normal process operations.

(4) Performance tests conducted on air pollution control 

devices serving submerged arc furnaces must be conducted such 

that at least one tapping period, or at least 20 minutes of a 

tapping period, whichever is less, is included in at least two 

of the three runs. The sampling time for each run must be at 

least as long as three times the average tapping period of the 

tested furnace, but no less than 60 minutes.

(5) The sample volume for each run must be at least 0.9 

dscm (30 dscf).

(6) You must conduct the performance tests specified in 

paragraph (c) of this section under such conditions as the 

Administrator specifies based on representative performance of 

the affected source for the period being tested. Upon request, 

you must make available to the Administrator such records as may 

be necessary to determine the conditions of performance tests.

(b) Test methods. The following test methods in appendix A 

of part 60 of this chapter must be used to determine compliance 

with the emission standards.
(1) Method 1 to select the sampling port location and the 

number of traverse points.

(2) Method 2 to determine the volumetric flow rate of the 

stack gas.

(3) Method 3 to determine the dry molecular weight of the 

stack gas.

(4) Method 4 to determine the moisture content of the stack 

gas.

(5) Method 5 to determine the particulate matter 

concentration of the stack gas for negative pressure baghouses 

and positive pressure baghouses with stacks.

(6) Method 5D to determine particulate matter concentration 

and volumetric flow rate of the stack gas for positive pressure 

baghouses without stacks.

(7) Method 9 of Appendix A-4 of 40 CFR part 60 to determine 

opacity. ASTM D7520-13, “Standard Test Method for Determining 

the Opacity of a Plume in the Outdoor Ambient Atmosphere” may be 

used (incorporated by reference, see 40 CFR 63.14) with the 

following conditions:Method 9 to determine opacity.

(i) During the digital camera opacity technique (DCOT) 

certification procedure outlined in Section 9.2 of ASTM D7520-

13, the owner or operator or the DCOT vendor must present the 
plumes in front of various backgrounds of color and contrast 

representing conditions anticipated during field use such as 

blue sky, trees and mixed backgrounds (clouds and/or a sparse 

tree stand).

(ii) The owner or operator must also have standard 

operating procedures in place including daily or other frequency 

quality checks to ensure the equipment is within manufacturing 

specifications as outlined in Section 8.1 of ASTM D7520-13.

(iii) The owner or operator must follow the recordkeeping 

procedures outlined in §63.10(b)(1) for the DCOT certification, 

compliance report, data sheets and all raw unaltered JPEGs used 

for opacity and certification determination.

(iv) The owner or operator or the DCOT vendor must have a 

minimum of four (4) independent technology users apply the 

software to determine the visible opacity of the 300 

certification plumes. For each set of 25 plumes, the user may 

not exceed 15 percent opacity of any one reading and the average 

error must not exceed 7.5 percent opacity.

(v) Use of this approved alternative does not provide or 

imply a certification or validation of any vendor’s hardware or 

software. The onus to maintain and verify the certification 

and/or training of the DCOT camera, software and operator in 
accordance with ASTM D7520-13 and these requirements is on the 

facility, DCOT operator and DCOT vendor.

(8) The owner or operator may use equivalent alternative 

measurement methods approved by the Administrator following the 

procedures described in §63.7(f) of subpart A.

(c) Compliance demonstration with the emission standards. 

(1) The owner or operator must conduct an initial performance 

test for air pollution control devices or vent stacks subject to 

§63.1652(a) through (e) to demonstrate compliance with the 

applicable emission standards.

(2) The owner or operator must conduct annual performance 

tests for the air pollution control devices and vent stacks 

associated with the submerged arc furnaces, with the exception 

of any air pollution control devices that serve tapping 

emissions combined with non-furnace emissions, such as the MOR 

process or equipment associated with crushing and screening. 

Also excluded are air pollution control devices that serve 

dedicated non-furnace emissions, such as the MOR process or 

equipment associated with crushing and screening. The results of 

these annual tests will be used to demonstrate compliance with 

the emission standards in §63.1652(a) through (e), as 

applicable.
(3) Following development, and approval, if required, of 

the site-specific test plan, the owner or operator must conduct 

a performance test for each air pollution control device or vent 

stack to measure particulate matter and determine compliance 

with the applicable standard.

(i) An owner or operator of sources subject to the 

particulate matter concentration standards in §63.1652(a)(2), 

(d), or (e), must determine compliance as follows:

(A) Determine the particulate matter concentration using 

Method 5 or 5D, as applicable.

(B) Compliance is demonstrated if the average concentration 

for the three runs comprising the performance test does not 

exceed the standard.

(ii) An owner or operator of sources subject to the 

particulate mass rate standards in §63.1652(b) or (c) must 

determine compliance as follows:

(A) Determine the particulate matter concentration and 

volumetric flow rate using Method 5 or 5D, as applicable.

(B) Compute the mass rate (EM) of particulate matter for 

each run using the following equation:

EEMM = ��CCssssQQssssss

NN

=1

� /KK
Where: 

EM = mass rate of particulate matter, kg/hr (lb/hr).

N = total number of exhaust streams at which emissions are 

quantified.

Csi = concentration of particulate matter from exhaust stream 

“i”, mg/dscm (gr/dscf).

Qsdi = volumetric flow rate of effluent gas from exhaust stream 

“i”, dscm/hr (dscf/hr)

K = conversion factor, 1 × 106 mg/kg (7,000 gr/lb).

(C) Compliance is demonstrated if the average of the mass 

rates for the three runs comprising the performance test does 

not exceed the standard.

(iii) An owner or operator of sources subject to the 

particulate matter process-weighted rate standard in 

§63.1652(a)(1) must determine compliance as follows:

(A) Determine particulate matter concentration and 

volumetric flow rate using Method 5 or 5D, as applicable.

(B) Compute the process-weighted mass rate (EP) of 

particulate matter for each run using the following equation:

EEPP = ��CCssssQQssssss

NN

=1

� /PP
Where: 

EP = process-weighted mass rate of particulate matter, kg/hr/MW 

(lb/hr/MW).

N = total number of exhaust streams at which emissions are 

quantified.

Csi = concentration of particulate matter from exhaust stream 

“i”, mg/dscm (gr/dscf)

Qsdi = volumetric flow rate of effluent gas from exhaust stream 

“i”, dscm/hr (dscf/hr)

P = Average furnace power input, MW

K = conversion factor, 1 × 106 mg/kg (7,000 gr/lb).

(C) Compliance is demonstrated if the average processweighted mass rate for the three runs comprising the performance 

test does not exceed the standard.

(4) If a venturi scrubber is used to comply with the 

emission standards, the owner or operator must establish as a 

site-specific operating parameter the lowest average pressure 

drop on any individual complying run in the three runs 

constituting any compliant test. The pressure drop must be 

monitored at least every 5 minutes during the test and hourly 

averages recorded.
(i) [Reserved]

(ii) The owner or operator may augment the data obtained 

under paragraph (a)(4) of this section by conducting multiple 

performance tests to establish a range of compliant operating 

parameter values. The lowest value of this range would be 

selected as the operating parameter monitoring value. The use of 

historic compliance data may be used to establish the compliant 

operating parameter value if the previous values were recorded 

during performance tests using the same test methods specified 

in this subpart and established as required in paragraph (a)(4) 

of this section.

(d) Compliance demonstration with opacity standards. (1)(i) 

The owner or operator subject to §63.1653 must conduct initial 

opacity observations of the shop building to demonstrate 

compliance with the applicable opacity standards according to 

§63.6(h)(5), which addresses the conduct of opacity or visible 

emission observations.

(ii) In conducting the opacity observations of the shop 

building, the observer must limit his or her field of view to 

the area of the shop building roof monitor that corresponds to 

the placement of the affected submerged arc furnaces.
(iii) The owner or operator must conduct the opacity 

observations according to EPA Method 9 of 40 CFR part 60, 

appendix A, for a minimum of 60 minutes.

(2)(i) When demonstrating initial compliance with the shop 

building opacity standard, as required by paragraph (d)(1) of 

this section, the owner or operator must simultaneously 

establish parameter values for one of the following: the control 

system fan motor amperes and all capture system damper 

positions, the total volumetric flow rate to the air pollution 

control device and all capture system damper positions, or 

volumetric flow rate through each separately ducted hood that 

comprises the capture system.

(ii) The owner or operator may petition the Administrator 

to reestablish these parameters whenever he or she can 

demonstrate to the Administrator's satisfaction that the 

submerged arc furnace operating conditions upon which the 

parameters were previously established are no longer applicable. 

The values of these parameters determined during the most recent 

demonstration of compliance must be maintained at the 

appropriate level for each applicable period.

(3) The owner or operator must demonstrate continuing 

compliance with the opacity standards by following the 

monitoring requirements specified in §63.1657(c) and the 
reporting and recordkeeping requirements specified in 

§§63.1659(b)(4) and 63.1660(b).

(e) Compliance demonstration with the operational and work 

practice standards—(1) Fugitive dust sources. Failure to have a 

fugitive dust control plan or failure to report deviations from 

the plan and take necessary corrective action would be a 

violation of the general duty to ensure that fugitive dust 

sources are operated and maintained in a manner consistent with 

good air pollution control practices for minimizing emissions 

per §63.1652(f)§63.6(e)(1)(i) of subpart A.

(2) Baghouses equipped with bag leak detection systems. The 

owner or operator demonstrates compliance with the bag leak 

detection system requirements by submitting reports as required 

by §63.1659(b)(5) showing that the alarm on the system does not 

sound for more than 5 percent of the total operating time in a 

6-month period. Calculate the percentage of total operating time 

the alarm on the bag leak detection system sounds as follows:

(i) Do not include alarms that occur due solely to a 

malfunction of the bag leak detection system in the calculation.

(ii) [Reserved]Do not include alarms that occur during 

startup, shutdown, and malfunction in the calculation if the 

condition is described in the startup, shutdown, and malfunction 
plan and the owner or operator operates the source during such 

periods in accordance with §63.6(e)(1).

(iii) Count 1 hour of alarm time for each alarm where the 

owner or operator initiates procedures to determine the cause 

within 1 hour of the alarm.

(iv) Count the actual time it takes the owner or operator 

to initiate procedures to determine the cause of the alarm for 

each alarm where the owner or operator does not initiate 

procedures to determine the cause within 1 hour of the alarm.

(v) Calculate the percentage of time the alarm on the bag 

leak detection system sounds as the ratio of the sum of alarm 

times to the total operating time multiplied by 100.

§63.1657 Monitoring requirements.

(a) Baghouses. (1) For the baghouses serving the submerged 

arc furnaces, the metal oxygen refining process, and crushing 

and screening operations, the owner or operator must observe on 

a daily basis for the presence of any visible emissions.

(2) In addition to the daily visible emissions observation, 

the owner or operator must conduct the following activities:

(i) Daily monitoring of pressure drop across each baghouse 

cell, or across the baghouse if it is not possible to monitor 

each cell individually, to ensure the pressure drop is within 
the normal operating range identified in the baghouse 

maintenance plan.

(ii) Weekly confirmation that dust is being removed from 

hoppers through visual inspection, or equivalent means of 

ensuring the proper functioning of removal mechanisms.

(iii) Daily check of compressed air supply for pulse-jet 

baghouses.

(iv) An appropriate methodology for monitoring cleaning 

cycles to ensure proper operation.

(v) Monthly check of bag cleaning mechanisms for proper 

functioning through visual inspection or equivalent means.

(vi) Quarterly visual check of bag tension on reverse air 

and shaker-type baghouses to ensure that the bags are not kinked 

(kneed or bent) or laying on their sides. Such checks are not 

required for shaker-type baghouses using self-tensioning (spring 

loaded) devices.

(vii) Quarterly confirmation of the physical integrity of 

the baghouse structure through visual inspection of the baghouse 

interior for air leaks.

(viii) Semiannual inspection of fans for wear, material 

buildup, and corrosion through visual inspection, vibration 

detectors, or equivalent means.
(3) In addition to meeting the requirements of paragraphs 

(a)(1) and (a)(2) of this section, the owner or operator of a 

new or reconstructed submerged arc furnace must install and 

continuously operate a bag leak detection system if the furnace 

primary and/or tapping emissions are ducted to a negative 

pressure baghouse or to a positive pressure baghouse equipped 

with a stack. The bag leak detection system must meet the 

following requirements:

(i) The bag leak detection system must be certified by the 

manufacturer to be capable of detecting particulate matter 

emissions at concentrations of 10 milligrams per actual cubic 

meter (0.0044 grains per actual cubic foot) or less.

(ii) The bag leak detection system sensor must provide 

output of relative particulate matter loadings, and the owner or 

operator must continuously record the output from the bag leak 

detection system.

(iii) The bag leak detection system must be equipped with 

an alarm system that will sound when an increase in relative 

particulate loadings is detected over a preset level. The alarm 

must be located where it can be heard by the appropriate plant 

personnel.

(iv) Each bag leak detection system that works based on the 

triboelectric effect must be installed, calibrated, operated, 
and maintained consistent with the U.S. Environmental Protection 

Agency guidance document “Fabric Filter Bag Leak Detection 

Guidance” (EPA-454/R-98-015). Other bag leak detection systems 

must be installed, calibrated, and maintained consistent with 

the manufacturer's written specifications and recommendations.

(v) The initial adjustment of the system must, at a 

minimum, consist of establishing the baseline output by 

adjusting the sensitivity (range) and the averaging period of 

the device, and establishing the alarm set points and the alarm 

delay time.

(vi) Following initial adjustment, the owner or operator 

must not adjust the sensitivity or range, averaging period, 

alarm set points, or alarm delay time, except as detailed in the 

maintenance plan required under §63.1655(b). In no event must 

the sensitivity be increased by more than 100 percent or 

decreased more than 50 percent over a 365-day period unless a 

responsible official certifies the baghouse has been inspected 

and found to be in good operating condition.

(vii) Where multiple detectors are required, the system's 

instrumentation and alarm may be shared among detectors.

(4) As part of the maintenance plan required by 

§63.1655(b), the owner or operator must develop and implement 

corrective action procedures to be followed in the case of a bag 
leak detection system alarm (for baghouses equipped with such a 

system), the observation of visible emissions from the baghouse, 

or the indication through the periodic baghouse system 

inspections that the system is not operating properly. The owner 

or operator must initiate corrective action as soon as 

practicable after the occurrence of the observation or event 

indicating a problem.

(5) The corrective action plan must include procedures used 

to determine the cause of an alarm or other indications of 

problems as well as actions to minimize emissions. These actions 

may include the following:

(i) Inspecting the baghouse for air leaks, torn or broken 

bags or filter media, or any other condition that may cause an 

increase in emissions.

(ii) Sealing off defective bags or filter media.

(iii) Replacing defective bags or filter media, or 

otherwise repairing the control device.

(iv) Sealing off a defective baghouse compartment.

(v) Cleaning the bag leak detection system probe, or otherwise 

repairing the bag leak detection system.

(vi) Shutting down the process producing the particulate 

matter emissions.
(6) Failure to monitor or failure to take corrective action 

under the requirements of paragraph (a) of this section would be 

a violation of the general duty to operate in a manner 

consistent with good air pollution control practices that 

minimizes emissions per §63.1652(f)§63.6(e)(1)(i) of subpart A.

(b) Venturi scrubbers. (1) The owner or operator must 

monitor the pressure drop across the venturi at least every 5 

minutes and record the average hourly pressure drop. Measurement 

of an average hourly pressure drop less than the pressure drop 

operating parameter limit established during a successful 

compliance demonstration would be a violation of the applicable 

emission standard, unless the excursion in the pressure drop is 

due to a malfunction.

(2) As part of the maintenance plan required by 

§63.1655(b), the owner or operator must develop and implement 

corrective action procedures to be followed in the case of a 

violation of the pressure drop requirement. The owner or 

operator must initiate corrective action as soon as practicable 

after the excursion.

(3) Failure to monitor or failure to take corrective action 

under the requirements of paragraph (b) of this section is a 

violation of the general duty to operate in a manner consistent 
with good air pollution control practices that minimizes 

emissions per §63.1652(f)§63.6(e)(1)(i).

(c) Shop opacity. The owner or operator subject to the 

opacity standards in §63.1653 must comply with one of the 

monitoring options in paragraphs (c)(1), (c)(2) or (c)(3) of 

this section. The selected option must be consistent with that 

selected during the initial performance test described in 

§63.1656(d)(2). Alternatively, the owner or operator may use the 

provisions of §63.8(f) to request approval to use an alternative 

monitoring method.

(1) The owner or operator must check and record the control 

system fan motor amperes and capture system damper positions 

once per shift.

(2) The owner or operator must install, calibrate, and 

maintain a monitoring device that continuously records the 

volumetric flow rate through each separately ducted hood.

(3) The owner or operator must install, calibrate, and 

maintain a monitoring device that continuously records the 

volumetric flow rate at the inlet of the air pollution control 

device and must check and record the capture system damper 

positions once per shift.
(4) The flow rate monitoring devices must meet the 

following requirements:

(i) Be installed in an appropriate location in the exhaust 

duct such that reproducible flow rate monitoring will result.

(ii) Have an accuracy ±10 percent over its normal operating 

range and be calibrated according to the manufacturer's 

instructions.

(5) The Administrator may require the owner or operator to 

demonstrate the accuracy of the monitoring device(s) relative to 

Methods 1 and 2 of appendix A of part 60 of this chapter.

(6) Failure to maintain the appropriate capture system 

parameters (fan motor amperes, flow rate, and/or damper 

positions) establishes the need to initiate corrective action as 

soon as practicable after the monitoring excursion in order to 

minimize excess emissions.

(7) Failure to monitor or failure to take corrective action 

under the requirements of paragraph (c) of this section is a 

violation of the general duty to operate in a manner consistent 

with good air pollution control practices that minimizes 

emissions per §63.1652(f)§63.6(e)(1)(i).

§63.1658 Notification requirements.
(a) As required by §63.9(b) of subpart A, unless otherwise 

specified in this subpart, the owner or operator must submit the 

following written notifications to the Administrator:

(1) The owner or operator of an area source that 

subsequently becomes subject to the requirements of the standard 

must provide notification to the applicable permitting authority 

as required by §63.9(b)(1).

(2) As required by §63.9(b)(2), the owner or operator of an 

affected source that has an initial startup before the effective 

date of the standard must notify the Administrator that the 

source is subject to the requirements of the standard. The 

notification must be submitted no later than 120 calendar days 

after May 20, 1999 (or within 120 calendar days after the source 

becomes subject to this standard) and must contain the 

information specified in §63.9(b)(2)(i) through (b)(2)(v).

(3) As required by §63.9(b)(3), the owner or operator of a 

new or reconstructed affected source, or a source that has been 

reconstructed such that it is an affected source, that has an 

initial startup after the effective date and for which an 

application for approval of construction or reconstruction is 

not required under §63.5(d), must notify the Administrator in 

writing that the source is subject to the standards no later 

than 120 days after initial startup. The notification must 
contain the information specified in §63.9(b)(2)(i) through 

(b)(2)(v), delivered or postmarked with the notification 

required in §63.9(b)(5).

(4) As required by §63.9(b)(4), the owner or operator of a 

new or reconstructed major affected source that has an initial 

startup after the effective date of this standard and for which 

an application for approval of construction or reconstruction is 

required under §63.5(d) must provide the information specified 

in §63.9(b)(4)(i) through (b)(4)(v).

(5) As required by §63.9(b)(5), the owner or operator who, 

after the effective date of this standard, intends to construct 

a new affected source or reconstruct an affected source subject 

to this standard, or reconstruct a source such that it becomes 

an affected source subject to this standard, must notify the 

Administrator, in writing, of the intended construction or 

reconstruction.

(b) Request for extension of compliance. As required by 

§63.9(c), if the owner or operator of an affected source cannot 

comply with this standard by the applicable compliance date for 

that source, or if the owner or operator has installed BACT or 

technology to meet LAER consistent with §63.6(i)(5), he or she 

may submit to the Administrator (or the State with an approved 
permit program) a request for an extension of compliance as 

specified in §63.6(i)(4) through (i)(6).

(c) Notification that source is subject to special 

compliance requirements. As required by §63.9(d), an owner or 

operator of a new source that is subject to special compliance 

requirements as specified in §63.6(b)(3) and (b)(4) must notify 

the Administrator of his or her compliance obligations no later 

than the notification dates established in §63.9(b) for new 

sources that are not subject to the special provisions.

(d) Notification of performance test. As required by 

§63.9(e), the owner or operator of an affected source must 

notify the Administrator in writing of his or her intention to 

conduct a performance test at least 30 calendar days before the 

performance test is scheduled to begin to allow the 

Administrator to review and approve the site-specific test plan 

required under §63.7(c) and to have an observer present during 

the test.

(e) Notification of opacity and visible emission 

observations. As required by §63.9(f), the owner or operator of 

an affected source must notify the Administrator in writing of 

the anticipated date for conducting the opacity or visible 

emission observations specified in §63.6(h)(5). The notification 

must be submitted with the notification of the performance test 
date, as specified in paragraph (d) of this section, or if 

visibility or other conditions prevent the opacity or visible 

emission observations from being conducted concurrently with the 

initial performance test required under §63.7, the owner or 

operator must deliver or postmark the notification not less than 

30 days before the opacity or visible emission observations are 

scheduled to take place.

(f) Notification of compliance status. The owner or 

operator of an affected source must submit a notification of 

compliance status as required by §63.9(h). The notification must 

be sent before the close of business on the 60th day following 

completion of the relevant compliance demonstration.

§63.1659 Reporting requirements.

(a) General reporting requirements. The owner or operator 

of a ferromanganese and silicomanganese production facility must 

comply with all of the reporting requirements under §63.10 of 

subpart A, unless otherwise specified in this subpart.

(1) Frequency of reports. As provided by §63.10(a)(5), if 

the owner or operator is required to submit periodic reports to 

a State on an established time line, he or she may change the 

dates by which periodic reports submitted under this part may be 

submitted (without changing the frequency of reporting) to be 

consistent with the State's schedule by mutual agreement between 
the owner or operator and the State. This provision may be 

applied at any point after the source's compliance date.

(2) Reporting results of performance tests. As required by 

§63.10(d)(2), the owner or operator of an affected source must 

report the results of the initial performance test as part of 

the notification of compliance status required in §63.1658(f).

(3) [Reserved]

(4) Reporting malfunctions. If a malfunction occurred 

during the reporting period, the report must include the number, 

duration and a brief description for each type of malfunction 

which occurred during the reporting period and which caused or 

may have caused any applicable emission limitation to be 

exceeded. The report must also include a description of actions 

taken by an owner or operator during a malfunction of an 

affected source to minimize emissions in accordance with 

§63.1652(f), including actions taken to correct a 

malfunction.Periodic startup, shutdown, and malfunction reports. 

(i) As required by §63.10(d)(5)(i), if actions taken by an owner 

or operator during a startup, shutdown, or malfunction of an 

affected source (including actions taken to correct a 

malfunction) are consistent with the procedures specified in the 

startup, shutdown, and malfunction plan, the owner or operator 

must state such information in a semiannual report. The report, 
to be certified by the owner or operator or other responsible 

official, must be submitted semiannually and delivered or 

postmarked by the 30th day following the end of each calendar 

half; and

(ii) Any time an action taken by an owner or operator 

during a startup, shutdown, or malfunction (including actions 

taken to correct a malfunction) is not consistent with the 

procedures in the startup, shutdown, and malfunction plan, the 

owner or operator must comply with all requirements of 

§63.10(d)(5)(ii).

(b) Specific reporting requirements. In addition to the 

information required under §63.10, reports required under 

paragraph (a) of this section must include the information 

specified in paragraphs (b)(1) through (b)(5) of this section. 

As allowed by §63.10(a)(3), if any State requires a report that 

contains all of the information required in a report listed in 

this section, an owner or operator may send the Administrator a 

copy of the report sent to the State to satisfy the requirements 

of this section for that report.

(1) Air pollution control devices. The owner or operator 

must submit reports that summarize the records maintained as 

part of the practices described in the maintenance plan for air 

pollution control devices required under §63.1655(b), including 
an explanation of the periods when the procedures were not 

followed and the corrective actions taken.

(2) Venturi scrubbers. In addition to the information 

required to be submitted in paragraph (b)(1) of this section, 

the owner or operator must submit reports that identify the 

periods when the average hourly pressure drop of venturi 

scrubbers used to control particulate emissions dropped below 

the levels established in §63.1656(c)(4), and an explanation of 

the corrective actions taken.

(3) Fugitive dust. The owner or operator must submit 

reports that explain the periods when the procedures outlined in 

the fugitive dust control plan pursuant to §63.1654(a) were not 

followed and the corrective actions taken.

(4) Capture system. The owner or operator must submit 

reports that summarize the monitoring parameter excursions 

measured pursuant to §63.1657(c) and the corrective actions 

taken.

(5) Bag leak detection system. The owner or operator must 

submit reports including the following information:

(i) Records of all alarms.

(ii) Description of the actions taken following each bag 

leak detection system alarm.
(iii) Calculation of the percent of time the alarm on the 

bag leak detection system sounded during the reporting period.

(6) Frequency of reports. (i) The owner or operator must 

submit reports pursuant to §63.10(e)(3) that are associated with 

excess emissions events such as the excursion of the scrubber 

pressure drop limit per paragraph (b)(2) of this section. These 

reports are to be submitted on a quarterly basis, unless the 

owner or operator can satisfy the requirements in §63.10(e)(3) 

to reduce the frequency to a semiannual basis.

(ii) All other reports specified in paragraphs (b)(1) 

through (b)(5) of this section must be submitted semiannually.

§63.1660 Recordkeeping requirements.

(a) General recordkeeping requirements. (1) The owner or 

operator of a ferromanganese and silicomanganese production 

facility must comply with all of the recordkeeping requirements 

under §63.10.

(2) As required by §63.10(b)(2), the owner or operator must 

maintain records for 5 years from the date of each record of:

(i) Records of the occurrence and duration of each 

malfunction of operation (i.e., process equipment) or the air 

pollution control equipment and monitoring equipment;The 

occurrence and duration of each startup, shutdown, or 
malfunction of operation (i.e., process equipment and control 

devices);

(ii) Records of actions taken during periods of malfunction 

to minimize emissions in accordance with §63.1652(f), including 

corrective actions to restore malfunctioning process and air 

pollution control and monitoring equipment to its normal or 

usual manner of operation;The occurrence and duration of each 

malfunction of the source or air pollution control equipment;

(iii) All maintenance performed on the air pollution 

control equipment;

(iv) [Reserved]Actions taken during periods of startup, 

shutdown, and malfunction (including corrective actions to 

restore malfunctioning process and air pollution control 

equipment to its normal or usual manner of operation) when such 

actions are different from the procedures specified in the 

startup, shutdown, and malfunction plan;

(v) [Reserved]All information necessary to demonstrate 

conformance with the startup, shutdown, and malfunction plan 

when all actions taken during periods of startup, shutdown, and 

malfunction (including corrective actions) are consistent with 

the procedures specified in such plan. This information can be 

recorded in a checklist or similar form (see §63.10(b)(2)(v));
(vi) All required measurements needed to demonstrate 

compliance with the standard and to support data that the source 

is required to report, including, but not limited to, 

performance test measurements (including initial and any 

subsequent performance tests) and measurements as may be 

necessary to determine the conditions of the initial test or 

subsequent tests;

(vii) All results of initial or subsequent performance 

tests;

(viii) If the owner or operator has been granted a waiver 

from recordkeeping or reporting requirements under §63.10(f), 

any information demonstrating whether a source is meeting the 

requirements for a waiver of recordkeeping or reporting 

requirements;

(ix) If the owner or operator has been granted a waiver 

from the initial performance test under §63.7(h), a copy of the 

full request and the Administrator's approval or disapproval;

(x) All documentation supporting initial notifications and 

notifications of compliance status required by §63.9; and

(xi) As required by §63.10(b)(3), records of any 

applicability determination, including supporting analyses.
(b) Specific recordkeeping requirements. (1) In addition to 

the general records required by paragraph (a) of this section, 

the owner or operator must maintain records for 5 years from the 

date of each record of:

(i) Records of pressure drop across the venturi if a 

venturi scrubber is used.

(ii) Records of manufacturer certification that monitoring 

devices are accurate to within 5 percent (unless otherwise 

specified in this subpart) and of calibrations performed at the 

manufacturer's recommended frequency, or at a frequency 

consistent with good engineering practice, or as experience 

dictates.

(iii) Records of bag leak detection system output.

(iv) An identification of the date and time of all bag leak 

detection system alarms, the time that procedures to determine 

the cause of the alarm were initiated, the cause of the alarm, 

an explanation of the actions taken, and the date and time the 

alarm was corrected.

(v) Copy of the written maintenance plan for each air 

pollution control device.

(vi) Copy of the fugitive dust control plan.
(vii) Records of each maintenance inspection and repair, 

replacement, or other corrective action.

(2) All records for the most recent 2 years of operation 

must be maintained on site. Records for the previous 3 years may 

be maintained off site.

§63.1661 Implementation and enforcement.

(a) This subpart can be implemented and enforced by the 

U.S. EPA, or a delegated authority such as the applicable State, 

local, or Tribal agency. If the U.S. EPA Administrator has 

delegated authority to a State, local, or Tribal agency, then 

that agency, in addition to the U.S. EPA, has the authority to 

implement and enforce this subpart. Contact the applicable U.S. 

EPA Regional Office to find out if this subpart is delegated to 

a State, local, or Tribal agency.

(b) In delegating implementation and enforcement authority 

of this subpart to a State, local, or Tribal agency under 

subpart E of this part, the authorities contained in 

paragraph (c) of this section are retained by the 

Administrator of U.S. EPA and cannot be transferred to the 

State, local, or Tribal agency.
(c) The authorities that cannot be delegated to State, 

local, or Tribal agencies are as specified in paragraphs (c)(1) 

through (4) of this section.

(1) Approval of alternatives to requirements in §§63.1650 

and 63.1652 through 63.1654.

(2) Approval of major alternatives to test methods under 

§63.7(e)(2)(ii) and (f), as defined in §63.90, and as required 

in this subpart.

(3) Approval of major alternatives to monitoring under 

§63.8(f), as defined in §63.90, and as required in this subpart.

(4) Approval of major alternatives to recordkeeping and 

reporting under §63.10(f), as defined in §63.90, and as required 

in this subpart.

§§63.1662-63.1679 [Reserved]

Table 1 to Subpart XXX of Part 63—General Provisions 

Applicability to Subpart XXX

Reference Applies to 

subpart 

XXX

Comment

63.1 Yes

63.2 Yes

63.3 Yes

63.4 Yes

63.5 Yes
Reference Applies to 

subpart 

XXX

Comment

63.6(a), (b), (c) Yes

63.6(d) No Section reserved.

63.6(e)(1)(i) No See 63.1623(g) and 

63.1652(f) for 

general duty 

requirement. 

63.6(e)(1)(ii) No

63.6(e)(1)(iii) Yes

63.6(e)(2) No Section reserved.

63.6(e)(3) No

63.6(f)(1) No

6.6(f)(2) – (f)(3) Yes

63.6(g) Yes

63.6(h)(1) No

63.6(h)(2) – (h)(9) Yes .

63.6(i) Yes

63.6(j) Yes

§63.7(a)-(d) Yes

§63.7(e)(1) No See 63.1625(a)(5) 

and 63.1656(a)(6)

§63.7(e)(2)-(e)(4) Yes

63.7(f), (g), (h) Yes

63.8(a)-(b) Yes

63.8(c)(1)(i) No See 63.1623(g) and 

63.1652(f) for 

general duty 

requirement. 

63.8(c)(1)(ii) Yes
Reference Applies to 

subpart 

XXX

Comment

63.8(c)(1)(iii) No

63.8(c)(2)-(d)(2) Yes

63.8(d)(3) Yes, 

except for 

last 

sentence

SSM plans are not 

required.

63.8(e)-(g) Yes

63.9(a),(b),(c),(e),(g),(h)(1)

through (3), (h)(5) and (6), 

(i) and (j)

Yes

63.9(f) Yes

63.9(h)(4) No Reserved

63.10 (a) Yes

63.10 (b)(1) Yes

63.10(b)(2)(i) No

63.10(b)(2)(ii) No See 63.1628 and 

63.1660 for 

recordkeeping of 

(1) occurrence and 

duration and (2) 

actions taken 

during malfunction. 

63.10(b)(2)(iii) Yes

63.10(b)(2)(iv)-(b)(2)(v) No

63.10(b)(2)(vi)-(b)(2)(xiv) Yes

63.10)(b)(3) Yes

63.10(c)(1)-(9) Yes

63.10(c)(10)-(11) No See 63.1628 and 

63.1660 for 

malfunction 

recordkeeping 
Reference Applies to 

subpart 

XXX

Comment

requirements. 

63.10(c)(12)-(c)(14) Yes

63.10(c)(15) No

63.10(d)(1)-(4) Yes

63.10(d)(5) No See 63.1628(d)(8) 

and 63.1659(a)(4) 

for malfunction 

reporting 

requirements.

63.10(e)-((f) Yes

63.11 No Flares will not be 

used to comply with 

the emission limits

63.12 to 63.15 Yes