PART 63--NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR 

POLLUTANTS 

FOR SOURCE CATEGORIES

 1. The authority citation for part 63 continues to read as 

follows:

 Authority: 42 U.S.C. 7401 et seq.

 2. Part 63 is amended by adding subpart TTT, to read as 

follows:

Subpart TTT--National Emission Standards for Hazardous Air 

Pollutants for Primary Lead SmeltingProcessing

Sec.

§63.1541 Applicability.

§63.1542 Definitions.

§63.1543 Standards for process and process fugitive sources.

§63.1544 Standards for fugitive dust sources.

§63.1545 Compliance dates.

§63.1546 Test methodsPerformance Testing.

§63.1547 Monitoring requirements.

§63.1548 Notification requirements.

§63.1549 Recordkeeping and reporting requirements.

§63.1550 Delegation of authority.

§63.1551 Affirmative defense for exceedance of emission limit 

during malfunction.

Subpart TTT--National Emission Standards for Hazardous Air 
Pollutants for Primary Lead SmeltingProcessing

Sec. §63.1541 Applicability.

 (a) The provisions of this subpart apply to apply to any 

facility engaged in producing lead metal from ore concentrates. 

The category includes, but is not limited to, the following 

affected sources at primary lead smelters: sinter machine, blast 

furnace, dross furnacesmelting processes: sintering, reduction, 

preliminary treatment, refining and casting operations, process 

fugitive sources, and fugitive dust sources. The sinter process 

includes an updraft or downdraft sintering machine. The 

reduction process includes the blast furnace, electric smelting 

furnace with a converter or reverberatory furnace, and slag 

fuming furnace process units. The preliminary treatment process 

includes the drossing kettles and dross reverberatory furnace 

process units. The refining process includes the refinery 

process unit. The provisions of this subpart do not apply to 

secondary lead smelters, lead refiners, or lead remelters.

 (b) Table 1 of this subpart specifies the provisions of 

subpart A that apply and those that do not apply to owners and 

operators of primary lead smelters. The following sections of 

part 63 apply to this subpart as stated in subpart A and Table 

1: Sec. 63.1 (Applicability), Sec. 63.2 (Definitions), Sec. 63.3 

(Units and abbreviations), Sec. 63.4 (Prohibited activities and 

circumvention), Sec. 63.5 (Construction and reconstruction), 

Sec. 63.7 (Performance testing requirements), Sec. 63.8 

(Monitoring requirements), Sec. 63.12 (State authority and

delegations), Sec. 63.13 (Addresses of State air pollution 

control agencies and EPA Regional Offices), Sec. 63.14 

(Incorporations by reference), and Sec. 63.15 (Availability of 

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information confidentiality). The following sections of part 63 

apply to the extent specified in this subpart and Table 1: Sec. 

63.6 (Compliance with standards and maintenance requirements), 

Sec. 63.9 (Notification requirements), and Sec. 63.10 

(Recordkeeping and reporting requirements). Section Sec. 63.11

Control device requirements) does not apply to this subpart.

Sec. (b) Table 1 of this subpart specifies the provisions of 

subpart A of this part that apply and those that do not apply to 

owners and operators of primary lead processors. 

§63.1542 Definitions.

 Terms used in this subpart are defined in the Act, in 

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

 Affirmative defense means, in the context of an enforcement 

proceeding, a response or defense put forward by a defendant, 

regarding which the defendant has the burden of proof, and the 

merits of which are independently and objectively evaluated in a 

judicial or administrative proceeding.

 Bag leak detection system means a system that is capable of

continuously monitoring relative 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.

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 Blast furnace means any reduction furnace to which sinter is 

charged and which forms separate layers of molten slag and lead 

bullion.

 Building means a roofed and walled structure with limited 

openings to allow access and egress for people and vehicles.

 Charging location means the physical opening through which 

raw materials are introduced into a sinter machine, blast 

furnace, or dross furnace.

 Dross furnace means any smelting furnace to which drosses 

are charged and which chemically and physically separates lead 

from other impurities.

 Drossing and refining kettle means an open-top vessel that 

is constructed of cast iron or steel and is indirectly heated 

from below and contains molten lead for the purpose of drossing, 

refining, or alloying lead. Included are pot furnaces, receiving 

kettles, and holding kettles.

 Fugitive dust source means a stationary source of hazardous 

air pollutant emissions at a primary lead smelterprocessor

resulting from the handling, storage, transfer, or other 

management of lead-bearing materials where the source is not 

associated withpart of a specific process, process vent, or 

stack. Fugitive dust sources include roadways, storage piles, 

materials handling transfer points, and materials transport 

areas.

 Furnace area means any area of a primary lead 

smelterprocessor in which a blast furnace or dross furnace is 

located.

 Lead refiner means any facility that refines lead metal that 

is not located at a primary lead processor.

 Lead remelter means any facility that remelts lead metal 

that is not located at a primary lead processor.

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 Malfunction means any sudden, infrequent, and not reasonably

preventable failure of air pollution control and monitoring 

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 that are caused in part by poor maintenance 

or careless operation are not malfunctions. 

Failures that are caused in part by poor maintenance or careless

operation are not malfunctions.

 Materials storage and handling area means any area of a 

primary lead smelterprocessor in which lead-bearing materials 

(including ore concentrate, sinter, granulated lead, dross, 

slag, and flue dust) are stored or handled between process 

steps, including areas in which materials are stored in piles, 

bins, or tubs, and areas in which material is prepared for 

charging to a sinter achinemachine or smelting furnace or other 

lead processing operation.

 Operating time means the period of time in hours that an 

affected source is in operation beginning at a startup and 

ending at the next shutdown.

 Plant operating time means the period of time in hours that 

either a sinter machine or blast furnace is in operation.

 Plant roadway means any area of a primary lead 

smelterprocessor that is subject to vehicle traffic, including 

traffic by fork liftsforklifts, front-end loaders, or vehicles 

carrying ore concentrates or cast lead ingots. 

Excluded from this definition are employee and visitor parking 

areas, provided they are not subject to traffic by vehicles 

carrying lead-bearing materials.

 Primary lead smelterprocessor means any facility engaged in 

the production of lead metal from lead sulfide ore concentrates 

through the use of pyrometallurgical or other techniques.

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 Process fugitive source means a source of hazardous air 

pollutant missionsemissions at a primary lead smelterprocessor

that is associated with lead smelting, processing or refining 

but is not the primary exhaust stream and is not a fugitive dust 

source. Process fugitive sources include sinter machine charging 

locations, sinter machine discharge locations, sinter crushing 

and sizing equipment, furnace charging locations, furnace taps, 

and drossing kettles,kettle and refining kettleskettle charging 

or tapping locations.

 Refining and casting area means any area of a primary lead 

smelterprocessor in which drossing or refining operations occur, 

or casting operations occur.

 Secondary lead smelter means any facility at which leadbearing scrap material, primarily, but not limited to, lead-acid 

batteries, is recycled into elemental lead or lead alloys by 

smelting.

 Shutdown means the cessation of operation of an affected 

source for any purpose.

 Sinter machine means any device in which a lead sulfide ore 

concentrate charge is heated in the presence of air to eliminate 

sulfur contained in the charge and to agglomerate the charge 

into a hard porous mass called sinter.

 Sinter machine area means any area of a primary lead 

smelterprocessor where a sinter machine, or sinter crushing and 

sizing equipment is located.

 Sinter machine discharge end means the physical opening at 

the end of a sinter machine where the sinter exits the sinter 

machine.

 Startup means the setting in operation of an affected source 

for any purpose.

 Tapping location means the opening thruthrough which lead 

and slag are removed from the furnace.

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Sec. §63.1543 Standards for process and process fugitive 

sources.

 (a) No owner or operator of any existing, new, or 

reconstructed primary lead smelterprocessor shall discharge or 

cause to be discharged into the atmosphere lead compounds in 

excess of 500 grams of lead per megagram of lead metal produced

(1.0.97 pounds of lead per ton of lead metal produced) from the 

aggregation of emissions discharged from the air pollution 

control devices used to control emissions from the sources 

listed in paragraphs (a)(1) through (a)(9) of this section.

 (1) Sinter machine;

 (2) Blast furnace;

 (3) Dross furnace;

 (4) Dross furnace charging location;

 (5) Blast furnace and dross furnace tapping location;

 (6) Sinter machine charging location;

 (7) Sinter machine discharge end;

 (8) Sinter crushing and sizing equipment; and

 (9) Sinter machine area.

 (b) No owner or operator of any existing, new, or 

reconstructed primary lead processor shall discharge or cause to 

be discharged into the atmosphere lead compounds in excess of 

1.2 tons per year from the aggregation of the air pollution 

control devices used to control emissions from furnace area and 

refining and casting operations.

 (c) The process fugitive sources listed in paragraphs (a)(4) 

through (a)(8) of this section shallmust be equipped with a hood 

and shallmust be ventilated to a baghouse or equivalent control 

device. The hood design and ventilation rate shallmust be 

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consistent with American Conference of Governmental Industrial 

Hygienists recommended practices.

 (cd) The sinter machine area shallmust be enclosed in a 

building that is ventilated to a baghouse or equivalent control 

device at a rate that maintains a positive in-draft through any 

doorway opening.

 (de) Except as provided in paragraph (ef) of this section, 

following the initial testtests to demonstrate compliance with 

paragraphparagraphs (a) and (b) of this section, the owner or 

operator of a primary lead smelter shallprocessor must conduct a 

compliance testtests for lead compounds on an annuala quarterly

basis (no later than 12 calendar months100 days following any 

previous compliance test).

 (ef) If the three12 most recent compliance tests demonstrate 

compliance with the emission limit specified in 

paragraphparagraphs (a) and (b) of this section, the owner or 

operator of a primary lead smelterprocessor shall be allowed up 

to 2412 calendar months from the last compliance test to conduct 

the next compliance test for lead compounds.

 (fg) The owner or operator of a primary lead smelter 

shallprocessor must maintain and operate each baghouse used to 

control emissions from the sources listed in paragraphs (a)(1) 

through (a)(9) and (b) of this section such that the alarm on a 

bag leak detection system required under Sec. §63.1547(c)(98) 

does not sound for more than five percent of the total operating 

time in a 6-month reporting period.

 (gh) The owner or operator of a primary lead smelter 

shallprocessor must record the date and time of a bag leak 

detection system alarm and initiate procedures to determine the 

cause of the alarm according to the corrective action plan 

required under Sec. §63.1547(c)(9f) within 1 hour of the alarm. 
The cause of the alarm shallmust be corrected as soon as 

practicable.

Sec. (i) At all times, the owner or operator 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 which 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.

§63.1544 Standards for fugitive dust sources.

 (a) Each owner or operator of a primary lead smelter 

shallprocessor must prepare, and at all times operate according 

to, a standard operating procedures manual that describes in 

detail the measures that will be put in place to control 

fugitive dust emissions from the sources listed in paragraphs 

(a)(1) through (a)(5) of this section: that incorporates each of 

the specific work practices listed in paragraphs (a)(1) through 

(a)(5) of this section:

 (1) Plant roadways;.

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 (i)Paved plant roadways must be cleaned using a wet sweeper 

unless the temperature falls below 39 degrees Fahrenheit or when 

the application of water results in the formation of ice. During 

periods when the temperature is below 39 degrees Fahrenheit, 

paved plant roadways must be cleaned using a high efficiency dry 

sweeper.

(ii)Continuously operate a sprinkler system to wet plant 

roadways to prevent fugitive dust entrainment. This sprinkler 

system must be operated except during periods when the 

temperature is less than 39 degrees Fahrenheit or when the 

application of water results in formation of ice.

(2) Material storage and handling area(s);).

 (i)Chemically stabilize inactive concentrate storage piles 

a minimum of once every month to reduce particulate from wind 

born re-suspension.

(ii)Finished sinter must be sufficiently wetted to ensure 

fugitive dust emissions are minimized prior to loading to 

railcars.

(3) Sinter machine area(s);).

 (i)Personnel doors must be kept closed during operations 

except when entering or exiting the furnace building by the aid 

of door weights or similar device for automatic closure. 

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(ii)Large equipment doors must remain closed except when 

entering or existing the building using an automatic closure 

system or equivalent lock-and-key method.

(iii)It may be necessary to open doors subject to the 

requirements in sections 63.1544(a)(3)(i) and 63.1544(a)(3)(ii) 

to prevent heat stress or exhaustion of workers inside the 

sinter plant building. Records of such periods must be included 

in the report required under section 63.1549(e)(8).

(4) Furnace area(s); and).

 (i)Personnel doors must be kept closed during operations 

except when entering or exiting the furnace building by the aid 

of door weights or similar device for automatic closure. 

(ii)Large equipment doors must remain closed except when 

entering or existing the building using an automatic closure 

system or equivalent lock-and-key method.

(iii)It may be necessary to open doors subject to the 

requirements in sections 63.1544(a)(4)(i) and 63.1544(a)(4)(ii) 

to prevent heat stress or exhaustion of workers inside the blast 

furnace building. Records of such periods must be included in 

the report required under section 63.1549(e)(8).

(5) Refining and casting area(s).

 (i)Personnel doors must be kept closed during operations 

except when entering or exiting the furnace building by the aid 

of door weights or similar device for automatic closure. 

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(ii)Large equipment doors must remain closed except when 

entering or existing the building using an automatic closure 

system or equivalent lock-and-key method.

(iii)It may be necessary to open doors subject to the 

requirements in sections 63.1544(a)(5)(i) and 63.1544(a)(5)(ii) 

to prevent heat stress or exhaustion of workers inside the 

refining and casting building. Records of such periods must be 

included in the report required under section 63.1549(e)(8).

(b) Not withstanding paragraph (c) of this section, the 

standard operating procedures manual shall be submitted to the 

Administrator or delegated authority for review and approval.

 (c) Existing manuals that describe the measures in place 

to control fugitive dust sources required as part of a State 

implementation plan for lead shall satisfy the requirements of 

paragraph (a) of this section provided they addressinclude all 

the work practices as described in paragraphs (a)(1) through 

(a)(5) of this section and provided they address all the sources 

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

Sec. §63.1545 Compliance dates.

 (a) Each owner or operator of an existing primary lead 

smelter shall achieve compliance with the requirements of this 

subpart no later than May 4, 2001.processor must achieve 

compliance with the requirements in § 16.1543(a) no later than 

[INSERT DATE 60 DAYS FROM THE DATE OF PUBLICATION OF THESE 

AMENDMENTS IN THE FEDERAL REGISTER]. Each owner or operator of 

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an existing primary lead processor must achieve compliance with 

the requirements of §63.1544 no later than [INSERT DATE 90 DAYS 

FROM THE DATE OF PUBLICATION OF THESE AMENDMENTS IN THE FEDERAL 

REGISTER]. Each owner or operator of an existing primary lead 

processor must achieve compliance with the requirements in 

§63.1543(b) and §63.1543(e) of this subpart no later than 

[INSERT DATE TWO YEARS FROM THE DATE OF PUBLICATION OF THESE 

AMENDMENTS IN THE FEDERAL REGISTER].

 (b) Each owner or operator of a new primary lead smelter 

that commences construction or reconstruction after April 17, 

1998, shallprocessor must achieve compliance with the 

requirements of this subpart by June 4, 1999 or uponno later 

than [INSERT DATE 60 DAYS AFTER PUBLICATION OF THESE AMENDMENTS 

IN THE FERERAL REGISTER] or startup of operations, whichever is 

later.

Sec. (c) Prior to the dates specified in §63.1545(a), each 

owner or operator of an existing primary lead processor must 

continue to comply with the requirements of §63.1543 and 

§63.1544 as promulgated in the June 4, 1999 NESHAP for Primary 

Lead Smelting.

 (d) Each owner or operator of an existing primary lead 

processor must comply with the requirements of sections 

63.1547(g)(1), 63.1547(g)(2), 63.1551, and the revisions to 

Table 1 of Subpart TTT of Part 63 on [INSERT DATE OF PUBLICATION 

OF THESE AMENDMENTS IN THE FEDERAL REGISTER].

§63.1546 Test methodsPerformance testing. Formatted: Font: Bold

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 (a) The following procedure shallprocedures must be used to 

determine quarterly compliance with the emissions standard for 

lead compounds under Sec. §63.1543(a):) and (b) for existing 

sources:

 (1) The lead (1) Each owner or operator of existing 

sources listed in §63.1543(a)(1) through (9) and (b) must 

determine the lead compound emissionemissions rate, in units of 

gramspounds of lead per hour, for each source listed in Sec. 

63.1543(a)(1) through Sec. 63.1543(a)(9) shall be determined

according to the following test methods in appendix A of part 60 

of this chapter:

 (i) Method 1 shallmust be used to select the sampling port 

location and the number of traverse points.

 (ii) Method 2 shall, 2F, 2G must be used to measure 

volumetric flow rate.

 (iii) Method 3 shall, 3A 3B must be used for gas analysis.

 (iv) Method 4 shallmust be used to determine moisture 

content of the stack gas.

 (v) Method 12 shallor Method 29 must be used to measure 

thedetermine lead emissionemissions rate of the stack gas. The 

 (2) A performance test shall consist of at least three runs. 

For each test run with Method 12 or Method 29, the minimum 

sample time must be 60 minutes and the minimum volume shallmust

be 0.851 dry standard cubic meters (30meter (35 dry standard 

cubic feet) and the minimum sampling time shall be 60 minutes 

for each run. Three runs shall be performed and).

 (3) Performance tests shall be completed quarterly, once 

every 3 months, to determine compliance.

 (4) The lead emission rate in pounds per quarter is 

calculated by multiplying the average of quarterly lead emission 

rate in pounds per hour by the three runs shall be used to 

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determine compliance.quarterly plant operating time, in hours as 

shown in Equation 1:

 (2 (Eq. 1)

Where: 

EPb = quarterly lead emissions, pounds per quarter;

ERPb = quarterly lead emissions rate, pounds per hour; and

QPOT = quarterly plant operating time, hours per quarter.

 (5) The lead production rate, in units of megagramstons per 

hour, shallquarter, must be determined based on production data 

for the previous 12 calendar monthsquarter according to the 

procedures detailed in paragraphs (a)(25)(i) through (a)(2)(viv) 

of this section:

 (i) Total lead products production multiplied by the 

fractional lead content shallmust be determined in units of 

megragramstons.

 (ii) Total copper matte production multiplied by the 

fractional lead content shallmust be determined in units of 

megragramstons.

 (iii) Total copper speiss production multiplied by the 

fractional lead content shallmust be determined in units of 

megragramstons.

 (iv) Total quarterly lead production shallmust be determined 

by summing the values obtained in paragraphs (a)(25)(i) through 

(a)(25)(iii) of this section.

 (v) The lead 6) To determine compliance with the productionbased lead compound emission rate in §63.1543(a), the quarterly 

production-based lead compound emission rate, in units of 

megragramspounds of lead emissions per hours, shall beton of 

lead produced, is calculated based on the total lead production, 

as determined in accordance with paragraph (a)(shown in Equation 

2)(iv) of this section, divided by the total plant operating 

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time, in hours, for the previous 12 monthsdividing lead 

emissions by lead production.

 (3) The sum of lead compound emission rates for the sources 

in Sec. 63.1543(a)((1) through (a)(9), as determined in 

accordance with paragraph (a)(1) of this section, shall be 

divided by the lead production rate, as determined in accordance 

with paragraph (a)(2)(v) of this section, to obtain a 

production-based, lead compound emission rate in units of grams 

of lead per megagram of lead metal produced. The (Eq. 

Where :

CEPb = quarterly production-based, lead compound emission 

rate shall be used to, in units of pounds of lead emissions per 

ton of lead produced;

EPb = quarterly lead emissions, pounds per quarter; and

PPb = quarterly lead production, tons per quarter.

(7) To determine quarterly compliance with the emissions 

standard for lead compounds under Sec. 63.1543(a).§63.1543(b), 

sum the lead compound emission rates for the current and 

previous three quarters for the sources in §63.1543(b), as 

determined in accordance with paragraphs (a)(1) through (a)(4) 

of this section.

 (b) OwnerOwners and operators shallmust perform an initial 

compliance test to demonstrate compliance with the sinter 

building in-draft requirements of Sec. §63.1543(cd) at each 

doorway opening in accordance with paragraphs (b)(1) through 

(b)(4) of this section.

 (1) Use a propeller anemometer or equivalent device.

 (2) Determine doorway in-draft by placing the anemometer in 

the plane of the doorway opening near its center.

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 (3) Determine doorway in-draft for each doorway that is open 

during normal operation with all remaining doorways in their 

customary position during normal operation.

 (4) Do not determine doorway in-draft when ambient wind 

speed exceeds 2 meters per second.

Sec. (c) Performance tests shall be conducted under such 

conditions as the Administrator specifies to the owner or 

operator based on representative performance of the affected 

source for the period being tested. Upon request, the owner or 

operator shall make available to the Administrator such records 

as may be necessary to determine the conditions of performance 

tests.

§63.1547 Monitoring requirements.

 (a) Owners and operators of primary lead smelters 

shallprocessors must prepare, and at all times operate according 

to, a standard operating procedures manual that describes in 

detail the procedures for inspection, maintenance, and bag leak 

detection and corrective action for all baghouses that are used 

to control process, process fugitive, or fugitive dust emissions 

from any source subject to the lead emission standards in Secs. 

§§63.1543 and 63.1544, including those used to control emissions 

from general ventilation systems.

 (b) The standard operating procedures manual for baghouses 

required by paragraph (a) of this section shallmust be submitted 

to the Administrator or delegated authority for review and 

approval.

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 (c) The procedures specified in the standard operating 

procedures manual for inspections and routine maintenance 

shallmust, at a minimum, include the requirements of paragraphs 

(c)(1) through (c)(98) of this section.

 (1) Daily monitoring of pressure drop across each baghouse 

cell to ensure pressure drop is within the normal operating 

range identified in the standard operating procedures manual.

 (2 (1) Weekly confirmation that dust is being removed 

from hoppers through visual inspection or equivalent means of 

ensuring the proper functioning of removal mechanisms.

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

baghouses.

 (43) An appropriate methodology for monitoring cleaning 

cycles to ensure proper operation.

 (54) Monthly check of bag cleaning mechanisms for proper 

functioning through visual inspection or equivalent means.

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

and shaker-type baghouses to ensure that 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.

 (76) Quarterly confirmation of the physical integrity of the 

baghouse through visual inspection of the baghouse interior for 

air leaks.

 (87) Quarterly inspection of fans for wear, material 

buildup, and corrosion through visual inspection, vibration 

detectors, or equivalent means.

 (98) Except as provided in paragraph (h) of this section, 

continuous operation of a bag leak detection system.

 (d) The procedures specified in the standard operating 

procedures manual for maintenance shallmust, at a minimum, 

include a preventative maintenance schedule that is consistent 
with the baghouse manufacturer's instructions for routine and 

long-term maintenance.

 (e) The bag leak detection system required by paragraph 

(c)(98) of this section shallmust meet the specifications and 

requirements of (e)(1) through (e)(8) of this section.

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

manufacturer to be capable of detecting particulate matter 

emissions at concentrations of 10 milligram per actual cubic 

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

 (2) The bag leak detection system sensor must provide output 

of relative particulate matter loadings, and the owner or 

operator shallmust continuously record the output from the bag 

leak detection system.

 (3) The bag leak detection system must be equipped with an 

alarm system that will sound when an increase in relative 

particulate loading is detected over a preset level, and the 

alarm must be located such that it can be heard or otherwise 

determined by the appropriate plant personnel.

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

triboelectric effect shallmust be installed, calibrated, and 

maintained in a manner consistent with guidance provided in the 

U.S. Environmental Protection Agency guidance document ``”Fabric 

Filter Bag Leak Detection Guidance''Guidance” (EPA-454/R-98-

015). Other bag leak detection systems shallmust be installed, 

calibrated, and maintained in a manner consistent with the 

manufacturer's written specifications and recommendations.

 (5) The initial adjustment of the system shallmust, 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.
 (6) Following initial adjustment, the owner or operator 

shallmust not adjust the sensitivity or range, averaging period, 

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

approved SOP required under paragraph (a) of this section. In no 

event shall 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 that the baghouse has 

been inspected and found to be in good operating condition.

 (7) For negative pressure, induced air baghouses, and 

positive pressure baghouses that are discharged to the 

atmosphere through a stack, the bag leak detector must be 

installed downstream of the baghouse and upstream of any wet 

acid gas scrubber.

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

instrumentation and alarm may be shared among detectors.

 (f) The standard operating procedures manual required by 

paragraph (a) of this section shallmust include a corrective 

action plan that specifies the procedures to be followed in the 

event of a bag leak detection system alarm. The corrective 

action plan shallmust include, at a minimum, procedures to be 

used to determine the cause of an alarm, as well as actions to 

be taken to minimize emissions, which may include, but are not 

limited to, the following.

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

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

increase in emissions.

 (2) Sealing off defective bags or filter media.

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

repairing the control device.

 (4) Sealing off a defective baghouse compartment.
 (5) Cleaning the bag leak detection system probe, or 

otherwise repairing or maintaining the bag leak detection 

system.

 (6) Shutting down the process producing the particulate 

emissions.

 (g) The percentage of total operating time the alarm on the 

bag leak detection system sounds in a 6-month reporting period 

shallmust be calculated in order to determine compliance with 

the five percent operating limit in Sec. §63.1543(fg). The 

percentage of time the alarm on the bag leak detection system 

sounds shallsmust be determined according to paragraphs (g)(1) 

through (g)(53) of this section.

 (1) Alarms that occur due solely to a malfunction of the bag 

leak detection system shall not be included in the calculation.

 (2) Alarms that occur during startup, shutdown, or 

malfunction shall not be included in the calculation if the

condition is described in the startup, shutdown, and malfunction 

plan and the owner or operator follows all the procedures in the 

plan defined for this condition.

 (3 (1) For each alarm where the owner or operator 

initiates procedures to determine the cause of an alarm within 1 

hour of the alarm, 1 hour of alarm time shallmust be counted.

 (42) For each alarm where the owner or operator does not 

initiate procedures to determine the cause of the alarm within 1 

hour of the alarm, alarm time will be counted as the actual 

amount of time taken by the owner or operator to initiate 

procedures to determine the cause of the alarm.

 (53) The percentage of time the alarm on the bag leak 

detection system sounds shallmust be calculated as the ratio of 

the sum of alarm times to the total operating time multiplied by 

100.
 (h) Baghouses equipped with HEPA filters as a secondary 

filter used to control process or process fugitive sources 

subject to the lead emission standards in Sec. §63.1543 are 

exempt from the requirement in Sec. 63.1543paragraph(c)(9)8)of 

this section to be equipped with a bag leak detector. The owner 

or operator of an affected source that uses a HEPA filter 

shallmust monitor and record the pressure drop across the HEPA 

filter system daily. If the pressure drop is outside the 

limit(s) specified by the filter manufacturer, the owner or 

operator must take appropriate corrective measures, which may 

include, but not be limited to, the following:

 (1) Inspecting the filter and filter housing for air leaks 

and torn or broken filters.

 (2) Replacing defective filter media, or otherwise repairing 

the control device.

 (3) Sealing off a defective control device by routing air to 

other comparable control devices.

 (4) Shutting down the process producing the particulate 

emissions.

 (i) Owners and operators shallmust monitor sinter machine 

building in-draft to demonstrate continued compliance with the 

operating standard specified in Sec. §63.1543(cd) in accordance 

with either paragraph (i)(1), (i)(2), or (i)(3) of this section.

 (1) Owners and operators shallmust check and record on a 

daily basis doorway in-draft at each doorway in accordance with 

the methodology specified in Sec. §63.1546(b).

 (2) Owners and operators shallmust establish and maintain 

baseline ventilation parameters which result in a positive indraft according to paragraphs (i)(2)(i) through (i)(2)(iv) of 

this section.

 (i) Owners and operators shallmust install, calibrate, 

maintain, and operate a monitoring device that continuously 
records the actual volumetric flow rate through each separately 

ducted hood; or install, calibrate, maintain, and operate a 

monitoring device that continuously records the volumetric flow 

rate at the control device inlet of each exhaust system 

ventilating the building. The flow rate monitoring device(s) can 

be installed in any location in the exhaust duct such that 

reproducible flow rate monitoringmeasurements will result. The 

flow rate monitoring device(s) shallmust have an accuracy of 

plus or minus 10 percent over itsthe normal process operating 

range and shallmust be calibrated according to manufacturer's 

instructions.

 (ii) During the initial demonstration of sinter building indraft, and at any time the owner or operator wishes to reestablish the baseline ventilation parameters, the owner or 

operator shallmust continuously record the volumetric flow rate 

through each separately ducted hood, or continuously record the 

volumetric flow rate at the control device inlet of each exhaust 

system ventilating the building and record exhaust system damper 

positions. The owner or operator shallmust determine the average 

volumetric flow rate(s) corresponding to the period of time the 

in-draft compliance determinations are being conducted.

 (iii) The owner or operator shallmust maintain the 

volumetric flow rate(s) at or above the value(s) established 

during the most recent in-draft determination at all times the 

sinter machine is in operation. Volumetric flow rate(s) 

shallmust be calculated as a 15-minute average.

 (iv) If the volumetric flow rate is monitored at the control 

device inlet, the owner or operator shallmust check and record 

damper positions daily to ensure they are in the positions they 

were in during the most recent in-draft determination.
 (3) An owner or operator may request an alternative 

monitoring method by following the procedures and requirements 

in Sec. §63.8(f) of the General Provisions.

Sec. (j) Each owner or operator of new or modified sources 

listed under §63.1543 (a)(1) through (a)(9) and (b) must 

install, calibrate, maintain, and operate a continuous emission 

monitoring system (CEMS) for measuring lead emissions and a 

continuous emission rate monitoring system (CERMS)subject to 

Performance Specification 6 of Appendix B to part 60.

 (1) Each owner or operator of a source subject to the 

emissions limits for lead compounds under §63.1543(a)and (b) 

must install a CEMS for measuring lead emissions within 180 days 

of promulgation of performance specifications for lead CEMS.

 (i) Prior to promulgation of performance specifications for 

CEMS used to measure lead concentrations, an owner or operator 

must use the procedure described in §63.1546 (a)(1) through 

(a)(7) of this section to determine compliance. 

 (2) If a CEMS used to measure lead emissions is applicable, 

the owner or operator must install a CERMS with a sensor in a 

location that provides representative measurement of the exhaust 

gas flow rate at the sampling location of the CEMS used to 

measure lead emissions, taking into account the manufacturer’s 

recommendations. The flow rate sensor is that portion of the 

system that senses the volumetric flow rate and generates an 

output proportional to that flow rate.

 (i) The CERMS must be designed to measure the exhaust gas 

flow rate over a range that extends from a value of at least 20 

percent less than the lowest expected exhaust flow rate to a 

value of at least 20 percent greater than the highest expected 

exhaust gas flow rate. 
 (ii) The CERMS must be equipped with a data acquisition and 

recording system that is capable of recording values over the 

entire range specified in paragraph (b)(2)(i) of this section. 

 (iii) Each owner or operator must perform an initial 

relative accuracy test of the CERMS in accordance with the 

applicable Performance Specification in Appendix B to part 60 of 

the chapter. 

 (iv) Each owner or operator must operate the CERMS and 

record data during all periods of operation of the affected 

facility including periods of startup, shutdown, and 

malfunction, 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, 

calibration checks and required zero and span adjustments.

 (3) Each owner or operator must calculate the lead emissions 

rate in tons per year by summing all hours of CEMS data for a 

year to determine compliance with §63.1543 (b).

 (i) When the CERMS are unable to provide quality assured 

data the following applies: 

 (A) When data are not available for periods of up to 48 

hours, the highest recorded hourly emission rate from the 

previous 24 hours must be used.

 (B) When data are not available for 48 or more hours, the 

maximum daily emission rate based on the previous 30 days must 

be used.

§63.1548 Notification requirements.

 (a) The owner or operator of a primary lead smelter 

shallprocessor must comply with all of the notification 

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requirements of Sec. §63.9 of subpart A, General Provisions as 

specified in Table 1 of this subpart.

 (b) The owner or operator of a primary lead smelter 

shallprocessor must submit the fugitive dust control standard 

operating procedures manual required under Sec. 63.1544(a) and 

the standard operating procedures manual for baghouses required 

under Sec. §63.1547(a) to the Administrator or delegated 

authority along with a notification that the smelterprimary lead 

processor is seeking review and approval of these plansthe 

manual and procedures. Owners or operators of existing primary 

lead smelters shallprocessors must submit this notification no 

later than November 6, 2000. The owner or operator of a primary 

lead smelterprocessor that commences construction or 

reconstruction after April 17, 1998, shallmust submit this 

notification no later than 180 days before startup of the 

constructed or reconstructed primary lead smelterprocessor, but 

no sooner than September 2, 1999.

Sec. §63.1549 Recordkeeping and reporting requirements.

 (a) The owner or operator of a primary lead smelter 

shallprocessor must comply with all of the recordkeeping 

requirements of Sec. §63.10 of subpart A, General Provisions as 

specified in Table 1 of this subpart.

 (b) In addition to the general records required by paragraph 

(a) of this section, each owner or operator of a primary lead 

smelter shallprocessor must maintain for a period of 5 years, 

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

(b)(810) of this section.

 (1) Production records of the weight and lead content of 

lead products, copper matte, and copper speiss.

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 (2) Records of the bag leak detection system output.

 (3) 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 

cause of the alarm was corrected.

 (4) Any recordkeeping required as part of the practices 

described in the standard operating procedures manual for 

baghouses required under Sec. §63.15441547(a) for the control of 

fugitive dust emissions.).

 (5) Any recorkeeping required as part of the practices 

described in the standard operating procedures manual for 

baghouses required under Sec. 63.1547(a).

 (6 (5) If an owner or operator chooses to demonstrate 

continuous compliance with the sinter building in-draft 

requirement under Sec. §63.1543(cd) by employing the method 

allowed in Sec. §63.15461547(i)(1), the records of the daily 

doorway in-draft checks, an identification of the periods when 

there was not a positive in-draft, and an explanation of the 

corrective actions taken.

 (76) If an owner or operator chooses to demonstrate 

continuous compliance with the sinter building in-draft 

requirement under Sec. §63.1543(cd) by employing the method 

allowed in Sec. §63.15461547(i)(2), the records of the output 

from the continuous volumetric flow monitor(s), an 

identification of the periods when the 15-minute volumetric flow 

rate dropped below the minimum established during the most 

recent in-draft determination, and an explanation of the 

corrective actions taken.

 (87) If an owner or operator chooses to demonstrate 

continuous compliance with the sinter building in-draft 

requirement under Sec. §63.1543(cd) by employing the method 
allowed in Sec. §63.15461547(i)(2), and volumetric flow rate is 

monitored at the baghouse inlet, records of the daily checks of 

damper positions, an identification of the days that the damper 

positions were not in the positions established during the most 

recent in-draft determination, and an explanation of the 

corrective actions taken.

 (8) Records of the occurrence and duration of each 

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

pollution control equipment and monitoring equipment. 

 (9) Records of actions taken during periods of malfunction 

to minimize emissions in accordance with §§63.1543(i) and 

63.1544(d), including corrective actions to restore 

malfunctioning process and air pollution control and monitoring 

equipment to its normal or usual manner of operation.

 (c) 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.

 (d) The owner or operator of a primary lead smelter 

shallprocessor must comply with all of the reporting 

requirements of Sec. §63.10 of subpart A, General Provisions as 

specified in Table 1 of this subpart.

 (e) In addition to the information required under Sec. 

§63.10 of the General Provisions, the owner or operator 

shallmust provide semi-annual reports containing the information 

specified in paragraphs (e)(1) through (e)(79) of this section 

to the Administrator or designated authority.

 (1) The reports shallmust include records of all alarms from 

the bag leak detection system specified in Sec. §63.1547(e).

 (2) The reports shallmust include a description of the 

actions taken following each bag leak detection system alarm 

pursuant to Sec. §63.1547(f).
 (3) The reports shallmust include a calculation of the 

percentage of time the alarm on the bag leak detection system 

sounded during the reporting period pursuant to Sec. 

§63.1547(g).

 (4) If an owner or operator chooses to demonstrate 

continuous compliance with the sinter building in-draft 

requirement under Sec. §63.1543(cd) by employing the method 

allowed in Sec. §63.15461547(i)(1), the reports shallmust

contain an identification of the periods when there was not a 

positive in-draft, and an explanation of the corrective actions 

taken.

 (5) If an owner or operator chooses to demonstrate 

continuous compliance with the sinter building in-draft 

requirement under Sec. §63.1543(cd) by employing the method 

allowed in Sec. §63.15461547(i)(2), the reports shallmust

contain an identification of the periods when the 15-minute 

volumetric flow rate(s) dropped below the minimum established 

during the most recent in-draft determination, and an 

explanation of the corrective actions taken.

 (6) If an owner or operator chooses to demonstrate 

continuous compliance with the sinter building in-draft 

requirement under Sec. §63.1543(cd) by employing the method 

allowed in Sec. §63.15461547(i)(2), and volumetric flow rate is 

monitored at the baghouse inlet, the reports shallmust contain 

an identification of the days that the damper positions were not 

in the positions established during the most recent in-draft 

determination, and an explanation of the corrective actions 

taken.

 (7) The reports shallmust contain a summary of the records 

maintained as part of the practices described in the standard 

operating procedures manual for baghouses required under Sec. 
§63.1547(a), including an explanation of the periods when the 

procedures were not followed and the corrective actions taken.

 (8) The reports shallmust contain a summary of the fugitive 

dust control measures performed during the required reporting 

period, including an explanation of any periods when the 

procedures outlined in the standard operating procedures manual

required by Sec. §63.1544(a) were not followed and the 

corrective actions taken. The reports shallmust not contain 

copies of the daily records required to demonstrate compliance 

with the requirements of the standard operating procedures 

manuals required under Secs. §§63.1544(a) and Sec. 63.1547(a).

Sec. 9) If there was a malfunction during the reporting 

period, the report shall also 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 §§63.1543(i) and 63.1544(d), 

including actions taken to correct a malfunction.

§63.1550 Delegation of authority

 (a) In delegating implementation and enforcement authority 

to a State under section 112(1) of the act, the authorities 

contained in paragraph (b) of this section shallmust be retained 

by the Administrator and not transferred to a State.

 (b) Authorities which will not be delegated to States: no 

restrictions.

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§63.1551 Affirmative defense for exceedance of emission limit 

during malfunction.

 In response to an action to enforce the standards set forth 

in this subpart you may assert an affirmative defense to a claim 

for civil penalties for exceedances of such standards that are 

caused by malfunction, as defined at 40 CFR 63.2. Appropriate 

penalties may be assessed, however, if you fail to meet your 

burden of proving all of the requirements in the affirmative 

defense. The affirmative defense shall not be available for 

claims for injunctive relief.

 (a) To establish the affirmative defense in any action to 

enforce such a limit, you must timely meet the notification 

requirements in paragraph (b) of this section, and must prove by 

a preponderance of evidence that:

 (1) The excess emissions:

 (i) Were caused by a sudden, infrequent, and unavoidable 

failure of air pollution control and monitoring equipment, 

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

manner, and 

 (ii) Could not have been prevented through careful planning, 

proper design or better operation and maintenance practices; and

 (iii) Did not stem from any activity or event that could 

have been foreseen and avoided, or planned for; and 

 (iv) Were not part of a recurring pattern indicative of 

inadequate design, operation, or maintenance; and 

 (2) Repairs were made as expeditiously as possible when the 

applicable emission limitations were being exceeded. Off-shift 

and overtime labor were used, to the extent practicable to make 

these repairs; and 
 (3) The frequency, amount and duration of the excess 

emissions (including any bypass) were minimized to the maximum 

extent practicable during periods of such emissions; and 

 (4) If the excess emissions resulted from a bypass of 

control equipment or a process, then the bypass was unavoidable 

to prevent loss of life, personal injury, or severe property 

damage; and 

 (5) All possible steps were taken to minimize the impact of 

the excess emissions on ambient air quality, the environment and 

human health; and 

 (6) All emissions monitoring and control systems were kept 

in operation if at all possible, consistent with safety and good 

air pollution control practices; and 

 (7) All of the actions in response to the excess emissions 

were documented by properly signed, contemporaneous operating 

logs; and 

 (8) At all times, the facility was operated in a manner 

consistent with good practices for minimizing emissions; and 

 (9) A written root cause analysis has been prepared, the 

purpose of which is to determine, correct and eliminate the 

primary causes of the malfunction and the excess emissions 

resulting from the malfunction event at issue. The analysis 

shall also specify, using best monitoring methods and 

engineering judgment, the amount of excess emissions that were 

the result of the malfunction.

(b) Notification. The owner or operator of the facility 

experiencing an exceedance of its emission limit(s) during a 

malfunction shall notify the Administrator by telephone or 

facsimile (FAX) transmission as soon as possible, but no later 

than two business days after the initial occurrence of the 

malfunction, if it wishes to avail itself of an affirmative 

defense to civil penalties for that malfunction. The owner or 
operator seeking to assert an affirmative defense shall also 

submit a written report to the Administrator within 45 days of 

the initial occurrence of the exceedance of the standards in 

this subpart to demonstrate, with all necessary supporting 

documentation, that it has met the requirements set forth in 

paragraph (a) of this section. The owner or operator may seek an

extension of this deadline for up to 30 additional days by 

submitting a written request to the Administrator before the 

expiration of the 45 day period. Until a request for an 

extension has been approved by the Administrator, the owner or 

operator is subject to the requirement to submit such report 

within 45 days of the initial occurrence of the exceedance.

Table 1 of Subpart TTT-- – General Provisions Applicability to 

Subpart TTT

Reference

Applies 

to 

subpart 

TTT

Reference

Comment

* * * * * * *

Sec. 63.16(a), (b), 

(c)

Yes

Sec. 63.26 (d) YesNo Section reserved.

Sec. 63.36(e)(1)(i) YesNo See 63.1543(i) and 

63.1544(d) for general 

duty requirement. 

Sec. 63.46(e)(1)(ii) YesNo

Sec. 63.56(e)(1)(iii) Yes

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+ 8.91" + 9.54" + 10.18"

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+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

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+ 8.91" + 9.54" + 10.18"

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+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

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+ 8.91" + 9.54" + 10.18"

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+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

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+ 8.91" + 9.54" + 10.18"

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+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

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+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

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+ 8.91" + 9.54" + 10.18"

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+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

5.09" + 5.73" + 6.36" + 7" + 7.63" + 8.27"

+ 8.91" + 9.54" + 10.18"
63.6(e)(2) No Section reserved.

63.6(e)(3) No

63.6(f)(1) No

Sec. 63.6(a), (b), 

(c), (e (f), (g), (i) 

and (j).63.6(g)

Yes

Sec. 63.6(d) and (h) No No opacity limits in rule.

63.6(i) Yes

63.6(j) Yes

§63.7(a)-(d) Yes

Sec. §63.7(e)(1) YesNo See 63.1546(c). 

§63.7(e)(2)-(e)(4) Yes

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

Sec. 63.8(a)-(b) Yes

63.8(c)(1)(i) No

63.8(c)(1)(ii) Yes

63.8(c)(1)(iii) No

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

63.8(d)(3) Yes, except for last 

sentence

63.8(e)-(g) Yes

Sec. 63.9 (a), (),(b), 

(),(c), (d), (),(e), 

Yes

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+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

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+ 8.91" + 9.54" + 10.18"

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+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

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+ 8.91" + 9.54" + 10.18"
(),(g), (),(h)(1)

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

(6), (i) and (j).)

63.9(f) No

63.9(h)(4) No Reserved

63.10(b)(2)(i) No

Sec. 63.9(f) and 

(h)(410(b)(2)(ii)

No No opacity or visible 

emission limits in 

rule.See 63.1549(b)(9) and 

(10) for recordkeeping of 

occurrence and duration of 

malfunctions and 

recordkeeping of actions 

taken during malfunction. 

Sec. 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

Sec. 63.10(c)(10)-(11) No Flares will not be used to 

comply with the emission 

limits.See 63.1549(b)(9) 

and (10) for recordkeeping 

of malfunctions. 

Sec. 63.10(c)(12

through 63.15)-(c)(14)

Yes

63.10(c)(15) No

Formatted: Tab stops: Not at 0.64" + 1.27"

+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

5.09" + 5.73" + 6.36" + 7" + 7.63" + 8.27"

+ 8.91" + 9.54" + 10.18"

Formatted Table

Formatted: Tab stops: Not at 0.64" + 1.27"

+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

5.09" + 5.73" + 6.36" + 7" + 7.63" + 8.27"

+ 8.91" + 9.54" + 10.18"

Formatted: Tab stops: Not at 0.64" + 1.27"

+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

5.09" + 5.73" + 6.36" + 7" + 7.63" + 8.27"

+ 8.91" + 9.54" + 10.18"

Formatted: Tab stops: Not at 0.64" + 1.27"

+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

5.09" + 5.73" + 6.36" + 7" + 7.63" + 8.27"

+ 8.91" + 9.54" + 10.18"

Formatted: Tab stops: Not at 0.64" + 1.27"

+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

5.09" + 5.73" + 6.36" + 7" + 7.63" + 8.27"

+ 8.91" + 9.54" + 10.18"

Formatted Table

Formatted: Tab stops: Not at 0.64" + 1.27"

+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

5.09" + 5.73" + 6.36" + 7" + 7.63" + 8.27"

+ 8.91" + 9.54" + 10.18"

Formatted: Tab stops: Not at 0.64" + 1.27"

+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

5.09" + 5.73" + 6.36" + 7" + 7.63" + 8.27"

+ 8.91" + 9.54" + 10.18"

Formatted: Portuguese (Brazil)

Formatted: Portuguese (Brazil)

Formatted: Tab stops: Not at 0.64" + 1.27"

+ 1.91" + 2.54" + 3.18" + 3.82" + 4.45" +

5.09" + 5.73" + 6.36" + 7" + 7.63" + 8.27"

+ 8.91" + 9.54" + 10.18"
63.10(d)(1)-(4) Yes

63.10(d)(5) No See 63.1549(e)(9) for 

reporting of malfunctions.

63.10(e)-((f) Yes

* * * * * * *

[FR Doc. 99-12757 Filed 6-3-99; 8:45 am][INSERT FEDERAL REGISTER 

NUMBER, DATE FILED AND TIME]]

BILLING CODE 6560-50-M

Formatted: Font: 10 pt

Formatted: Font: 10 pt