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Subpart DDD—National Emission Standards for Hazardous Air 

Pollutants for Mineral Wool Production 

Contents 

Subpart DDD—National Emission Standards for Hazardous Air 

Pollutants for Mineral Wool Production

§ 63.1175 What is the purpose of this subpart?

§ 63.1176 Where can I find definitions of key words used in 

this subpart?

§ 63.1177 Am I subject to this subpart?

Standards

§ 63.1178 For cupolas, what standards must I meet?

§ 63.1179 For curing ovens, what standards must I meet?

§ 63.1180 When must I meet these standards?

Compliance With Standards

§ 63.1181 How do I comply with the particulate matter standards 

for existing, new, and reconstructed cupolas?

§ 63.1182 How do I comply with the carbon monoxide standards 

for new and reconstructed cupolas?

§ 63.1183 How do I comply with the formaldehyde standards for 

existing, new, and reconstructed curing ovens?

Additional Monitoring Information

§ 63.1184 What do I need to know about the design 

specifications, installation, and operation of a bag leak 

detection system?

§ 63.1185 How do I establish the average operating temperature 

of an incinerator?

§ 63.1186 How may I change the compliance levels of monitored 

parameters?

§ 63.1187 What do I need to know about operations, maintenance, 

and monitoring plans?

Performance Tests and Methods

§ 63.1188 What performance test requirements must I meet?

§ 63.1189 What test methods do I use?

§ 63.1190 How do I determine compliance?

Notification, Recordkeeping, and Reporting

§ 63.1191 What notifications must I submit?
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§ 63.1192 What recordkeeping requirements must I meet?

§ 63.1193 What reports must I submit?

Other Requirements and Information

§ 63.1194 Which general provisions apply?

§ 63.1195 Who implements and enforces this subpart?

§ 63.1196 What definitions should I be aware of?

§§ 63.1197-63.1199 [Reserved]

Appendix A to Subpart DDD of Part 63—Free Formaldehyde Analysis 

of Insulation Resins by the Hydroxylamine Hydrochloride Method

§ 63.1175 What is the purpose of this subpart? 

This subpart establishes national emission standards for 

hazardous air pollutants emitted from existing, new, and 

reconstructed cupolas and curing ovens at facilities that 

produce mineral wool. 

§ 63.1176 Where can I find definitions of key words used in this 

subpart? 

The definitions of key words used in this subpart are in 

the Clean Air Act (Act), in § 63.2 of the general provisions in 

subpart A of this part, and in § 63.1196 of this subpart. 

§ 63.1177 Am I subject to this subpart? 

You are subject to this subpart if you own or operate an 

existing, new, or reconstructed mineral wool production facility 

that is located at a plant site that is a major source of 

hazardous air pollutant (HAP) emissions, meaning the plant emits 

or has the potential to emit any single HAP at a rate of 9.07 
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megagrams (10 tons) or more per year or any combination of HAPs 

at a rate of 22.68 megagrams (25 tons) or more per year. 

Standards 

§ 63.1178 For cupolas, what standards must I meet? 

(a) You must control emissions from each cupola as follows: 

(1) Limit emissions of particulate matter (PM) from each 

existing, new, or reconstructed cupola to 0.05 kilograms (kg) of 

PM per megagram (MG) (0.10 pound [lb] of PM per ton) of melt or 

less. 

(2) Limit emissions of carbonyl sulfide from each existing, 

new, or reconstructed closed-top cupola to the following: 

(i) 3.4 lb of carbonyl sulfide per ton melt or less for 

existing closed-top cupolas. 

(ii) 0.062 lb of carbonyl sulfide per ton melt or less for 

new or reconstructed closed-top cupolas. 

(3) Limit emissions of carbonyl sulfide from each existing, 

new, or reconstructed open-top cupola to the following: 

(i) 6.8 lb of carbonyl sulfide per ton melt or less for 

existing open-top cupolas. 

(ii) 3.2 lb of carbonyl sulfide per ton melt or less for 

new or reconstructed open-top cupolas. 

(4) Limit emissions of hydrogen fluoride from each 

existing, new, or reconstructed cupola to the following: 
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(i) 0.16 lb of hydrogen fluoride per ton of melt or less 

for existing cupolas using slag as a raw material. 

(ii) 0.015 lb of hydrogen fluoride per ton of melt or less 

for new or reconstructed cupolas using slag as a raw material. 

(iii) 0.13 lb of hydrogen fluoride per ton of melt or less 

for existing cupolas that do not use slag as a raw material. 

(iv) 0.018 lb of hydrogen fluoride per ton of melt or less 

for new or reconstructed cupolas that do not use slag as a raw 

material. 

(5) Limit emissions of hydrogen chloride from each 

existing, new, or reconstructed cupola to the following: 

(i) 0.44 lb of hydrogen chloride per ton of melt or less 

for existing cupolas using slag as a raw material. 

(ii) 0.012 lb of hydrogen chloride per ton of melt or less 

for new or reconstructed cupolas using slag as a raw material. 

(iii) 0.43 lb of hydrogen chloride per ton of melt or less 

for existing cupolas that do not use slag as a raw material. 

(iv) 0.015 lb of hydrogen chloride per ton of melt or less 

for new or reconstructed cupolas that do not use slag as a raw 

material.(2) Limit emissions of carbon monoxide (CO) from each 

new or reconstructed cupola to either of the following: 

(i) 0.05 kg of CO per MG (0.10 lb of CO per ton) of melt or 

less. 
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(ii) A reduction of uncontrolled CO emissions by at least 

99 percent.

(b) You must meet the following operating limits for each 

cupola: 

(1) Begin within one hour after the alarm on a bag leak 

detection system sounds, and complete in a timely manner, 

corrective actions as specified in your operations, maintenance, 

and monitoring plan required by §63.1187 of this subpart. 

(2) When the alarm on a bag leak detection system sounds 

for more than five percent of the total operating time in a sixmonth reporting period, develop and implement a written quality 

improvement plan (QIP) consistent with the compliance assurance 

monitoring requirements of §64.8(b)-(d) of 40 CFR part 64. 

(3) Additionally, for each new or reconstructed cupola, you 

must either: 

(i) Mmaintain the operating temperature of the incinerator 

so that the average operating temperature for each three-hour 

block period never falls below the average temperature 

established during the performance test., or 

(ii) Maintain the percent excess oxygen in the cupola at or 

above the level established during the performance test. You 

must determine the percent excess oxygen using the following 

equation: 
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Percent	excess	oxygen = 	 Oxygen	available

Fuel	demand	for	oxygen

 − 1	∗ 100

where: 

Percent 

excess oxygen 

= 

Percentage of excess oxygen present above the 

stoichiometric balance of 1.00, (%). 

1.00 = 

Ratio of oxygen in a cupola combustion 

chamber divided by the stoichiometric 

quantity of oxygen required to obtain 

complete combustion of fuel. 

Oxygen 

available = 

Quantity of oxygen introduced into the cupola 

combustion zone. 

Fuel demand 

for oxygen = 

Required quantity of oxygen for 

stoichiometric combustion of the quantity of 

fuel present. 

§ 63.1179 For combined collection/curing operationscuring ovens, 

what standards must I meet? 

(a) You must control emissions from each existing, new, and 

reconstructed combined collection/curing operations by limiting 

emissions of formaldehyde, phenol, and methanol to the 

following: 

(1) For combined drum collection/ curing operations: 

(i) 0.17 lb of formaldehyde per ton melt or less, 

(ii) 0.85 lb of phenol per ton melt or less, and 

(iii) 0.28 lb of methanol per ton melt or less. 

(2) For combined horizontal collection/curing operations: 

(i) 0.63 lb of formaldehyde per ton melt or less, 

(ii) 0.12 lb of phenol per ton melt or less, and 

(iii) 0.049 lb of methanol per ton melt or less. 
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(3) For combined vertical collection/ curing operations: 

(i) 2.4 lb of formaldehyde per ton melt or less, 

(ii) 0.71 lb of phenol per ton melt or less, and 

(iii) 0.92 lb of methanol per ton melt or less. 

(b) You must meet the following operating limits for each 

combined collection/curing operations subcategory: (a) You must 

control emissions from each existing, new, or reconstructed 

curing oven by limiting emissions of formaldehyde to either of 

the following: 

(1) 0.03 kg of formaldehyde per MG (0.06 lb of formaldehyde 

per ton) of melt or less. 

(2) A reduction of uncontrolled formaldehyde emissions by 

at least 80 percent. 

(b) You must meet the following operating limits for each 

curing oven: 

(1) Maintain the free-formaldehyde content of each resin 

lot and the formaldehyde content of each binder formulation at 

or below the specification ranges of the resin and binder used 

during the performance test. 

(2) Maintain the operating temperature of each incinerator 

so that the average operating temperature for each three-hour 

block period never falls below the average temperature 

established during the performance test. 

§ 63.1180 When must I meet these standards? 
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(a) Existing cupolas and combined collection/curing

operationsovens. 

(1) You must install any control devices and monitoring

equipment necessary to meet the standards in § 63.1178(a)(1) and 

(b)this subpart, complete performance testing, and demonstrate 

compliance with all requirements of this subpart no later than 

the following: 

(1i) June 2, 2002; or 

(2ii) June 3, 2003 if you apply for and receive a one-year 

extension under section 112(i)(3)(B) of the Act. 

(2) You must install any control devices and monitoring 

equipment necessary to meet the standards in § 63.1178(a)(2) and 

through (a)(5) and § 63.1179, complete performance testing, and 

demonstrate compliance with all requirements of this subpart no 

later than [insert date 3 years after date of publication in the 

Federal Register] 

(3) You must comply with the provisions related to the 

electronic reporting provisions of §§ 63.1192(d) and 

63.1193(b)(1) and (g) no later than [insert date of publication 

in the Federal Register]. 

(b) New and reconstructed cupolas and combined 

collection/curing ovensoperations. You must install any control 

devices or monitoring equipment necessary to meet the standards 

in this subpart, complete performance testing, and demonstrate 
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compliance with all requirements of this subpart by the dates in 

§63.7 of the general provisions in subpart A of this part. 

(c) You must comply with the standards in §§ 63.1178 and 

63.1179 of this subpart on and after the dates in paragraphs (a) 

and (b) of this section. 

(d) 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 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.

(d) You must comply with these standards at all times 

except during periods of startup, shutdown, or malfunction. 

§ 63.1181 How do I comply with the particulate matter standards 

for existing, new, and reconstructed cupolas? 

To comply with the PM standards, you must meet all of the 

following: 

(a) Install, adjust, maintain, and continuously operate a 

bag leak detection system for each fabric filter. 
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(b) Do a performance test as specified in § 63.1188 of this 

subpart and show compliance with the PM emission limits while 

the bag leak detection system is installed, operational, and 

properly adjusted. 

(c) Begin corrective actions specified in your operations, 

maintenance, and monitoring plan required by § 63.1187 of this 

subpart within one hour after the alarm on a bag leak detection 

system sounds. Complete the corrective actions in a timely 

manner. 

(d) Develop and implement a written QIP consistent with 

compliance assurance monitoring requirements of 40 CFR 64.8(b) 

through (d) when the alarm on a bag leak detection system sounds 

for more than five percent of the total operating time in a sixmonth reporting period. 

§ 63.1182 How do I comply with the carbonyl sulfide, hydrogen 

fluoride, and hydrogen chloride standards for existing, 

new,carbon monoxide standards for new and reconstructed cupolas? 

To comply with the carbonyl sulfide, hydrogen fluoride, and 

hydrogen chloride standards, you must meet the following: 

(a) Install, calibrate, maintain, and operate a device that 

continuously measures the operating temperature in the firebox 

of each thermal incinerator. To comply with the CO standards, 

you must meet all of the following: 
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(a) Install, calibrate, maintain, and operate a device that 

continuously measures the operating temperature in the firebox 

of each thermal incinerator. 

(b) Conduct a performance test as specified in § 63.1188 of 

this subpart that shows compliance with the carbonyl sulfide, 

hydrogen fluoride, and hydrogen chloride emissions limits while 

the device for measuring incinerator operating temperature is 

installed, operational, and properly calibrated. Establish the 

average operating temperature based on the performance test as 

specified in § 63.1185(a) of this subpart.(b) Do a performance 

test as specified in § 63.1188 of this subpart and show 

compliance with the CO emission limits while the device for 

measuring incinerator operating temperature is installed, 

operational, and properly calibrated. Establish the average 

operating temperature as specified in § 63.1185(a) of this 

subpart.

(c) Following the performance test, measure and record the 

average operating temperature of the incinerator as specified in 

§ 63.1185(b) of this subpart. 

(d) Maintain the operating temperature of the incinerator 

so that the average operating temperature for each three-hour 

block period never falls below the average temperature 

established during the performance test. 
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(e) Operate and maintain the incinerator as specified in 

your operations, maintenance, and monitoring plan required by § 

63.1187 of this subpart. 

§ 63.1183 How do I comply with the formaldehyde , phenol, and 

methanol standards for existing, new, and reconstructed combined 

collection/curing operationsstandards for existing, new, and 

reconstructed curing ovens? 

To comply with the formaldehyde, phenol, and methanol 

standards, you must meet all of the following: 

(a) Install, calibrate, maintain, and operate a device that 

continuously measures the operating temperature in the firebox 

of each thermal incinerator. 

(b) Conduct a performance test as specified in § 63.1188 of 

this subpart while manufacturing the product that requires a 

binder formulation made with the resin containing the highest 

free-formaldehyde content specification range. Show compliance 

with the formaldehyde, phenol, and methanol emissions limits 

while the device for measuring the control device operating 

parameter is installed, operational, and properly calibrated. 

Establish the average operating parameter based on the 

performance test as specified in § 63.1185(a).(b) Do a 

performance test as specified in § 63.1188 of this subpart while 

manufacturing the product that requires a binder formulation 

made with the resin containing the highest free-formaldehyde 
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content specification range. Show compliance with the 

formaldehyde emission limits while the device for measuring 

incinerator operating temperature is installed, operational, and 

properly calibrated. Establish the average operating temperature 

as specified in § 63.1185(a) of this subpart.

(c) During the performance test that uses the binder 

formulation made with the resin containing the highest freeformaldehyde content specification range, record the freeformaldehyde content specification range of the resin used, and 

the formulation of the binder used, including the formaldehyde 

content and binder specification. 

(d) Following the performance test, monitor and record the 

free-formaldehyde content of each resin lot and the formulation 

of each batch of binder used, including the formaldehyde, 

phenol, and methanol content. 

 (d) Following the performance test, monitor and record the 

free-formaldehyde content of each resin lot and the formulation 

of each batch of binder used, including the formaldehyde 

content. 

(e) Maintain the free-formaldehyde content of each resin 

lot and the formaldehyde content of each binder formulation at 

or below the specification ranges established during the 

performance test. 
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(f) Following the performance test, measure and record the 

average operating temperature of the incinerator as specified in 

§ 63.1185(b) of this subpart. 

(g) Maintain the operating temperature of the incinerator 

so that the average operating temperature for each three-hour 

block period never falls below the average temperature 

established during the performance test. 

(h) Operate and maintain the incinerator as specified in 

your operations, maintenance, and monitoring plan required by § 

63.1187 of this subpart. 

(i) With prior approval from the Administrator, you may do 

short-term experimental production runs using resin where the 

free-formaldehyde content, or binder formulations where the 

formaldehyde content, is higher than the specification ranges of 

the resin and binder used during previous performance tests, or 

using experimental pollution prevention process modifications 

without first doing additional performance tests. Notification 

of intent to perform a short-term experimental production run 

must include the following information: 

(1) The purpose of the experimental run. 

(2) The affected production process. 

(3) How the resin free-formaldehyde content or binder 

formulation will deviate from previously approved levels or what 

the experimental pollution prevention process modifications are. 
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(4) The duration of the experimental run. 

(5) The date and time of the experimental run. 

(6) A description of any emissions testing to be done 

during the experimental run. 

Additional Monitoring Information 

§ 63.1184 What do I need to know about the design 

specifications, installation, and operation of a bag leak 

detection system? 

A bag leak detection system must meet the following

requirements: 

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

manufacturer to be capable of detecting PM emissions at 

concentrations of 10 milligrams per actual cubic meter (0.0044 

grains per actual cubic foot) or less. 

(b) The sensor on the bag leak detection system must 

provide output of relative PM emissions. 

(c) The bag leak detection system must have an alarm that 

will sound automatically when it detects an increase in relative 

PM emissions greater than a preset level. 

(d) The alarm must be located in an area where appropriate 

plant personnel will be able to hear it. 

(e) For a positive-pressure fabric filter, each compartment 

or cell must have a bag leak detector. For a negative-pressure 

or induced-air fabric filter, the bag leak detector must be 
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installed downstream of the fabric filter. If multiple bag leak 

detectors are required (for either type of fabric filter), 

detectors may share the system instrumentation and alarm. 

(f) Each triboelectric bag leak detection system must be 

installed, operated, adjusted, and maintained so that it follows 

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

015, September 1997). Other bag leak detection systems must be 

installed, operated, adjusted, and maintained so that they 

follow the manufacturer's written specifications and 

recommendations. 

(g) At a minimum, initial adjustment of the system must 

consist of establishing the baseline output in both of the 

following ways: 

(1) Adjust the range and the averaging period of the 

device. 

(2) Establish the alarm set points and the alarm delay 

time. 

(h) After initial adjustment, the range, averaging period, 

alarm set points, or alarm delay time may not be adjusted except 

as specified in the operations, maintenance, and monitoring plan 

required by § 63.1187 of this subpart. In no event may the range 

be increased by more than 100 percent or decreased by more than 

50 percent over a 365 day period unless a responsible official 

as defined in § 63.2 of the general provisions in subpart A of 
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this part certifies in writing to the Administrator that the 

fabric filter has been inspected and found to be in good 

operating condition. 

§ 63.1185 How do I establish the average operating temperature 

of an incinerator? 

(a) During the performance test, you must establish the 

average operating temperature of an incinerator as follows: 

(1) Continuously measure the operating temperature of the 

incinerator. 

(2) Determine and record the average temperatures in 

consecutive 15-minute blocks. 

(3) Determine and record the arithmetic average of the 

recorded average temperatures measured in consecutive 15-minute 

blocks for each of the one-hour performance test runs. 

(4) Determine and record the arithmetic average of the 

three one-hour average temperatures during the performance test 

runs. The average of the three one-hour performance test runs 

establishes the temperature level to use to monitor compliance. 

(b) To comply with the requirements for maintaining the 

operating temperature of an incinerator after the performance 

test, you must measure and record the average operating 

temperature of the incinerator as required by §§ 63.1182 and 

63.1183 of this subpart. This average operating temperature of 

the incinerator is based on the arithmetic average of the one-
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hour average temperatures for each consecutive three-hour period 

and is determined in the same manner described in paragraphs 

(a)(1) through (a)(4) of this section. 

§ 63.1186 How may I change the compliance levels of monitored 

parameters? 

You may change control device and process operating

parameter levels established during performance tests and used 

to monitor compliance if you do the following: 

(a) You must notify the Administrator of your desire to 

expand the range of a control device or process operating 

parameter level. 

(b) Upon approval from the Administrator, you must conduct 

additional performance tests at the proposed new control device 

or process operating parameter levels. Before operating at these 

levels, the performance test results must verify that, at the 

new levels, you comply with the emission limits in §§ 63.1178 

and 63.1179 of this subpart. 

§ 63.1187 What do I need to know about operations, maintenance, 

and monitoring plans? 

(a) An operations, maintenance, and monitoring plan must be 

submitted to the Administrator for review and approval as part 

of your application for the title V permit. 

(b) The operations, maintenance, and monitoring plan must 

include the following: 
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(1) Process and control device parameters you will monitor 

to determine compliance, along with established operating levels 

or ranges for each process or control device. 

(2) A monitoring schedule. 

(3) Procedures for properly operating and maintaining 

control devices used to meet the standards in §§ 63.1178 and 

63.1179 of this subpart. These procedures must include an 

inspection of each incinerator at least once per year. At a 

minimum, you must do the following as part of an incinerator 

inspection: 

(i) Inspect all burners, pilot assemblies, and pilot 

sensing devices for proper operation. Clean pilot sensor if 

necessary. 

(ii) Ensure proper adjustment of combustion air, and adjust 

if necessary. 

(iii) Inspect, when possible, all internal structures (such 

as baffles) to ensure structural integrity per the design 

specifications. 

(iv) Inspect dampers, fans, and blowers for proper 

operation. 

(v) Inspect motors for proper operation. 

(vi) Inspect, when possible, combustion chamber refractory 

lining. Clean, and repair or replace lining if necessary. 
Page 20 of 53 

(vii) Inspect incinerator shell for proper sealing,

corrosion, and/or hot spots. 

(viii) For the burn cycle that follows the inspection, 

document that the incinerator is operating properly and make any 

necessary adjustments. 

(ix) Generally observe whether the equipment is maintained 

in good operating condition. 

(x) Complete all necessary repairs as soon as practicable. 

(4) Procedures for keeping records to document compliance. 

(5) Corrective actions you will take if process or control 

device parameters vary from the levels established during 

performance testing. For bag leak detection system alarms, 

example corrective actions that may be included in the 

operations, maintenance, and monitoring plan include: 

(i) Inspecting the fabric filter 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 fabric filter compartment. 

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

otherwise repairing the bag leak detection system. 
Page 21 of 53 

(vi) Shutting down the process producing the particulate 

emissions. 

Performance Tests and Methods 

§ 63.1188 What performance test requirements must I meet? 

You must meet the following performance test requirements: 

(a) All monitoring systems and equipment must be installed, 

operational, and properly calibrated before the performance 

tests. 

(b) Conduct a performance test, consisting of three test 

runs, for each cupola and/or combined collection/curing 

operation subject to this subpart at the maximum production rate 

to demonstrate compliance with each of the applicable emissions 

limits in §§ 63.1178 and 63.1179. 

 (b) Do a performance test, consisting of three test runs, 

for each cupola and curing oven subject to this subpart at the 

maximum production rate to demonstrate compliance with each of 

the applicable emission limits in §§ 63.1178 and 63.1179 of this 

subpart. 

(c) Following the initial performance or compliance test to 

be conducted within 180 days of the effective date of this rule, 

you must conduct a performance test to demonstrate compliance 

with each of the applicable emissions limits in §§ 63.1178 and 

63.1179 of this subpart at least once every 5 years. (c) Measure 

emissions of PM from each existing cupola. 
Page 22 of 53 

(d) Measure emissions of PM, carbonyl sulfide, hydrogen 

fluoride, and hydrogen chloride from each existing, new, or 

reconstructed cupola. (d) Measure emissions of PM and CO from 

each new or reconstructed cupola. 

(e) Measure emissions of formaldehyde, phenol, and methanol 

from each existing, new, or reconstructed combined collection/ 

curing operation. 

 (e) Measure emissions of formaldehyde from each existing, 

new or reconstructed curing oven. 

(f) Measure emissions at the outlet of the control device 

for PM, carbonyl sulfide, hydrogen fluoride, hydrogen chloride, 

formaldehyde, phenol, and methanol. (f) Measure emissions at the 

outlet of the control device if complying with a numerical 

emission limit for PM, CO, or formaldehyde, or at the inlet and 

outlet of the control device if complying with a percent 

reduction emission limit for CO or formaldehyde. 

(g) To determine the average melt rate, measure and record 

the amount of raw materials, excluding coke, charged into and 

melted in each cupola during each performance test run. 

Determine and record the average hourly melt rate for each 

performance test run. Determine and record the arithmetic 

average of the average hourly melt rates associated with the 

three performance test runs. The average hourly melt rate of the 
Page 23 of 53 

three performance test runs is used to determine compliance with 

the applicable emission limits. 

(h) Compute and record the average emissions of the three 

performance test runs and use the equations in § 63.1190 of this 

subpart to determine compliance with the applicable emission 

limits. 

(i) Comply with control device and process operating 

parameter monitoring requirements for performance testing as 

specified in this subpart. 

§ 63.1189 What test methods do I use? 

You must use the following test methods to determine 

compliance with the applicable emission limits: 

(a) Method 1 in appendix A to part 60 of this chapter for 

the selection of the sampling port locations and number of 

sampling ports. 

(b) Method 2 in appendix A to part 60 of this chapter for 

stack gas velocity and volumetric flow rate. 

(c) Method 3 or 3A in appendix A to part 60 of this chapter 

for oxygen and carbon dioxide for diluent measurements needed to 

correct the concentration measurements to a standard basis. 

(d) Method 4 in appendix A to part 60 of this chapter for 

moisture content of the stack gas. 

(e) Method 5 in appendix A to part 60 of this chapter for 

the concentration of PM. Each PM test run must consist of a 
Page 24 of 53 

minimum run time of three hours and a minimum sample volume of 

3.75 dscm (135 dscf). 

(f) Method 10 in appendix A to part 60 of this chapter for 

the concentration of CO, using the continuous sampling option 

described in section 7.1.1 of the method. Each CO test run must 

consist of a minimum run time of one hour. 

(g) Method 318 at 40 CFR part 60, appendix A to this part 

for the concentration of formaldehyde, phenol, methanol, and 

carbonyl sulfide. 

(g) Method 318 in appendix A to this part for the 

concentration of formaldehyde or CO.

(h) Method to determine the free-formaldehyde content of 

each resin lot in appendix A of this subpart.

(i) Method 26A or 320 at 40 CFR part 60, appendix A to this 

part for the concentration of hydrogen fluoride and hydrogen 

chloride.

§ 63.1190 How do I determine compliance? 

(a) Using the results of the performance tests, you must 

use the following equation to determine compliance with the PM 

emission limit: 

where: 

E = Emission rate of PM, kg/Mg (lb/ton) of melt. 
Page 25 of 53 

C = Concentration of PM, g/dscm (gr/dscf). 

Q = Volumetric flow rate of exhaust gases, dscm/hr 

(dscf/hr). 

K 51 = Conversion factor, 1 kg/1,000 g (1 lb/7,000 gr).

P = Average melt rate, Mg/hr (ton/hr). 

(b) Using the results of the performance tests, you must 

use the following equation to determine compliance with the 

carbonyl sulfide, hydrogen fluoride, hydrogen chloride, 

formaldehyde, phenol, and methanol CO and formaldehyde numerical 

emission limits: 

where: 

E = Emission rate of measured pollutant, kg/Mg 

(lb/ton) of melt. 

C = Measured volume fraction of pollutant, ppm. 

MW = Molecular weight of measured pollutant, g/g-mole: 

carbonyly sulfide = 60.07, hydrogen fluoride = 

20.01, hydrogen chloride = 36.46, Formaldehyde = 

30.03, Phenol = 94.11, Methanol = 32.04.

CO = 28.01, Formaldehyde = 30.03. 

Q = Volumetric flow rate of exhaust gases, dscm/hr 

(dscf/hr). 

K1 = Conversion factor, 1 kg/1,000 g (1 lb/453.6 g). 

K2 = Conversion factor, 1,000 L/m3 (28.3 L/ft3). 

K3 = Conversion factor, 24.45 L/g-mole. 

P = Average melt rate, Mg/hr (ton/hr). 
Page 26 of 53 

(c) Using the results of the performance tests, you must 

use the following equation to determine compliance with the CO 

and formaldehyde percent reduction performance standards: 

where: 

%R = Percent reduction, or collection efficiency of

the control device. 

Li = Inlet loading of pollutant, kg/Mg (lb/ton). 

Lo = Outlet loading of pollutant, kg/Mg (lb/ton). 

Notification, Recordkeeping, and Reporting 

§ 63.1191 What notifications must I submit? 

You must submit written or electronic notifications to the 

Administrator as required by § 63.9(b) through (h) of subpart A 

of this part. Electronic notifications are encouraged when 

possible. You must submit written notifications to the 

Administrator as required by § 63.9(b)-(h) of the general 

provisions in subpart A of this part. These notifications 

include, but are not limited to, the following: 

(a) Notification that the following types of sources are 

subject to the standard: 

(1) An area source that increases its emissions so that it 

becomes a major source. 

(2) A source that has an initial startup before the

effective date of the standard. 
Page 27 of 53 

(3) A new or reconstructed source that has an initial 

startup after the effective date of the standard and doesn't 

require an application for approval of construction or 

reconstruction under § 63.5(d) of the general provisions in 

subpart A of this part. 

(b) Notification of intention to construct a new major 

source or reconstruct a major source where the initial startup 

of the new or reconstructed source occurs after the effective 

date of the standard and an application for approval of 

construction or reconstruction under § 63.5(d) of the general 

provisions in subpart A of this part is required. 

(c) Notification of special compliance obligations for a 

new source that is subject to special compliance requirements in 

§ 63.6(b)(3) and (4) of the general provisions in subpart A of 

this part. 

(d) Notification of a performance test at least 60 calendar 

days before the performance test is scheduled to begin. 

(e) Notification of compliance status. 

§ 63.1192 What recordkeeping requirements must I meet? 

You must meet the following recordkeeping requirements: 

(a) Maintain files of all information required by §

63.10(b) of the general provisions in subpart A of this part, 

including all notifications and reports. 

(b) Maintain records of the following information also: 
Page 28 of 53 

(1) Cupola production (melt) rate (Mg/hr (tons/hr) of 

melt). 

(2) All bag leak detection system alarms. Include the date 

and time of the alarm, when corrective actions were initiated, 

the cause of the alarm, an explanation of the corrective actions 

taken, and when the cause of the alarm was corrected. 

(3) The free-formaldehyde content of each resin lot and the 

binder formulation, including formaldehyde content, of each 

binder batch used in the manufacture of bonded products. 

(4) Incinerator operating temperature and results of 

incinerator inspections. For all periods when the average 

temperature in any three-hour block period fell below the 

average temperature established during the performance test, and 

all periods when the inspection identified incinerator 

components in need of repair or maintenance, include the date 

and time of the problem, when corrective actions were initiated, 

the cause of the problem, an explanation of the corrective 

actions taken, and when the cause of the problem was corrected. 

(c) Retain each record for at least five years following 

the date of each occurrence, measurement, corrective action, 

maintenance, record, or report. The most recent two years of 

records must be retained at the facility. The remaining three 

years of records may be retained off site. 
Page 29 of 53 

(d) Records must be maintained in a form suitable and 

readily available for expeditious review, according to § 63.10 

of the General Provisions that are referenced in Table 3 to this 

subpart. Electronic recordkeeping is encouraged. 

 (d) Retain records on microfilm, on a computer, on

computer disks, on magnetic tape disks, or on microfiche. 

(e) Report the required information on paper or on a 

labeled computer disk using commonly available and compatible 

computer software. 

§ 63.1193 What reports must I submit? 

You must prepare and submit reports to the Administrator as 

required by this subpart and § 63.10 of the general provisions 

in subpart A of this part. These reports include, but are not 

limited to, the following: 

(a) 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 (a)(1) or (2) of this section. 

(1) 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 
Page 30 of 53 

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: Group Leader, Measurement Policy Group, 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. 

(2) 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. 
Page 31 of 53 

 (a) A performance test report, as required by § 

63.10(d)(2) of the general provisions in subpart A of this part, 

that documents the process and control equipment operating 

parameters during the test period, the test methods and 

procedures, the analytical procedures, all calculations, and the 

results of the performance tests. 

(b) Reserved. A startup, shutdown, and malfunction plan, as 

described in § 63.6(e)(3) of the general provisions in subpart A 

of this part, that contains specific procedures for operating 

and maintaining the source during periods of startup, shutdown, 

and malfunction and a program of corrective action for 

malfunctioning process and control systems used to comply with 

the emission standards. In addition to the information required 

by § 63.6(e)(3), your plan must include the following: 

(1) Procedures to determine and record what caused the 

malfunction and when it began and ended. 

(2) Corrective actions you will take if a process or 

control device malfunctions, including procedures for recording 

the actions taken to correct the malfunction or minimize 

emissions. 

(3) An inspection and maintenance schedule for each process 

and control device that is consistent with the manufacturer's 

instructions and recommendations for routine and long-term 

maintenance.
Page 32 of 53 

(c) A report of each event as required by § 63.10(b) of the 

general provisions in subpart A of this part, including a report 

if an action taken during a startup, shutdown, or malfunction is 

inconsistent with the procedures in the plan as described in § 

63.6(e)(3) of the general provisions in subpart A of this part. 

(d) An operations, maintenance, and monitoring plan as 

specified in § 63.1187 of this subpart. 

(e) A semiannual report as required by § 63.10(e)(3) of the 

general provisions in subpart A of this part if measured 

emissions exceed the applicable standard or a monitored 

parameter varies from the level established during performance 

testing. The report must contain the information specified in § 

63.10(c) of the general provisions, as well as the relevant 

records required by § 63.1192(b) of this subpart. 

(f) A semiannual report stating that no excess emissions or 

deviations of monitored parameters occurred during the reporting 

period as required by § 63.10(e)(3)(v) of the general provisions 

in subpart A of this part if no deviations have occurred.

(g) All reports required by this subpart not subject to the 

requirements in paragraph (a) of this section must be sent to 

the Administrator at the appropriate address listed in § 63.13. 

If acceptable to both the Administrator and the owner or 

operator of a source, these reports may be submitted on 

electronic media. The Administrator retains the right to require 
Page 33 of 53 

submittal of reports subject to paragraph (a) of this section in 

paper format.

Other Requirements and Information 

§ 63.1194 Which general provisions apply? 

The general provisions in subpart A of this part define 

requirements applicable to all owners and operators affected by 

NESHAP in part 63. See Table 1 of this subpart for general 

provisions that apply (or don't apply) to you as an owner or 

operator subject to the requirements of this subpart. 

§ 63.1195 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 implementation and 

enforcement of 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. 
Page 34 of 53 

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 the requirements in §§ 

63.1177 through 63.1180. 

(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. 

§ 63.1196 What definitions should I be aware of? 

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

63.2 of the general provisions in subpart A of this part, and in 

this section as follows: 

Bag leak detection system means a monitoring device for a 

fabric filter that identifies an increase in particulate matter 

emissions resulting from a broken filter bag or other 

malfunction and sounds an alarm. 
Page 35 of 53 

Bonded product means mineral wool to which a hazardous air 

pollutant-based binder (containing such hazardous air pollutants 

as phenol or formaldehyde) has been applied.

Closed-top cupola means a cupola that operates as a closed 

(process) system and has a restricted air flow rate. 

CO means, for the purposes of this subpart, emissions of 

carbon monoxide that serve as a surrogate for emissions of 

carbonyl sulfide, a compound included on the list of hazardous 

air pollutants in section 112 of the Act.

Combined collection/curing operations means the combination 

of fiber collection operations and curing ovens used to make 

bonded products. 

Cupola means a large, water-cooled metal vessel to which is 

charged a mixture of fuel, rock and/or slag, and additives. As 

the fuel is burned, the charged mixture is heated to a molten 

state for later processing to form mineral wool. 

Curing oven means a chamber in which heat is used to 

thermoset a binder on the mineral wool fiber used to make bonded 

products. 

Fabric filter means an air pollution control device used to 

capture particulate matter by filtering gas streams through 

fabric bags. It also is known as a baghouse. 

Formaldehyde means, for the purposes of this subpart, 

emissions of formaldehyde that, in addition to being a HAP 
Page 36 of 53 

itself, serve as a surrogate for organic compounds included on 

the list of hazardous air pollutants in section 112 of the Act, 

including but not limited to phenol. 

Hazardous air pollutant means any air pollutant listed in 

or pursuant to section 112(b) of the Act. 

I means the owner or operator of a mineral wool production 

facility. 

Incinerator means an enclosed air pollution control device 

that uses controlled flame combustion to convert combustible 

materials to noncombustible gases. For the purposes of this 

subpart, the term “incinerator” means “regenerative thermal 

oxidizer”.

Melt means raw materials, excluding coke, that are charged 

into the cupola, heated to a molten state, and discharged to the 

fiber forming and collection process. 

Melt rate means the mass of molten material discharged from 

a single cupola over a specified time period. 

Mineral wool means a fibrous glassy substance made from 

natural rock (such as basalt), blast furnace slag or other slag, 

or a mixture of rock and slag. It may be used as a thermal or 

acoustical insulation material or in the making of other 

products to provide structural strength, sound absorbency, fire 

resistance, or other required properties. 
Page 37 of 53 

New source means any affected source the construction or 

reconstruction of which is commenced after May 8, 1997.

Open-top cupola means a cupola that is open to the outside 

air and operates with an air flow rate that is unrestricted and 

at low pressure. 

PM means, for the purposes of this subpart, emissions of 

particulate matter that serve as a surrogate for metals (in 

particulate or volatile form) on the list of hazardous air 

pollutants in section 112 of the Act, including but not limited 

to: antimony, arsenic, beryllium, cadmium, chromium, lead, 

manganese, nickel, and selenium.

Slag means the by-product materials separated from metals 

during smelting and refining of raw ore. 

You means the owner or operator of a mineral wool 

production facility. 

§ 63.1197 Startups and shutdowns. 

(a) The provisions set forth in this subpart apply at all 

times. 

(b) You must not shut down items of equipment that are 

utilized for compliance with this subpart during times when 

emissions are being, or are otherwise required to be, routed to 

such items of equipment. 

(c) Startup begins when fuels are ignited in the cupola. 

Startup ends when the cupola produces molten material. 
Page 38 of 53 

(d) Shutdown begins when the cupola has reached the end of 

the melting campaign and is empty. No molten material continues 

to flow from the cupola during shutdown. 

(e) During periods of startups and shutdowns you must 

operate your cupola according to one of the following methods: 

(1) You must keep records showing that your emissions were 

controlled using air pollution control devices operated at the 

parameters established by the most recent performance test that 

showed compliance with the standard; or 

(2) You must keep records showing the following: 

(i) You used only clean fuels during startup and shutdown; 

and 

(ii) You operate the cupola during startup and shutdown 

with three percent oxygen over the fuel demand for oxygen. 

§§ 63.11978-63.1199 [Reserved] 

Table 1 to Subpart DDD of Part 63—Applicability of General 

Provisions (40 CFR Part 63, Subpart A) to Subpart DDD of Part 63

General 

provisions 

citation 

Requirement Applies to 

subpart DDD? Explanation 

§ 63.1(a)(1)-

(a)(46) 

General 

Applicability 

Yes 

63.1(a)(5) No [Reserved]. 

63.1(a)(6)-

(a)(8) 

 Yes 
Page 39 of 53 

General 

provisions 

citation 

Requirement Applies to 

subpart DDD? Explanation 

§ 63.1(a)(7)-(9) No [Reserved]. 

§ 63.1(a)(10)-

(a)(1412) 

 Yes 

§ 63.1(b)(1) Initial 

Applicability 

Determination 

Yes 

§ 63.1(b)(2) No [Reserved]. 

§ 63.1(b)(3) Yes 

§ 63.1(c)(1)-(2) Applicability 

After Standard 

Established 

Yes 

63.1(c)(2) Yes Some plants 

may be area 

sources. 

§ 63.1(c)(3)-(4) No [Reserved]. 

§ 63.1(c)(4)-

(c)(5)-(e)

 Yes 

63.1(d) No [Reserved]. 

63.1(e) Applicability of 

Permit Program 

Yes 

§ 63.2 Definitions Yes Additional 

definitions 

in §63.1196.

§ 63.3 Units and 

Abbreviations 

Yes 

§ 63.4(a)(1)-

(a)(32) 

Prohibited 

Activities 

Yes 

§ 63.4(a)(4)(3)-

(5)

 No [Reserved]. 

63.4(a)(5) Yes 
Page 40 of 53 

General 

provisions 

citation 

Requirement Applies to 

subpart DDD? Explanation 

§ 63.4(b)-(c) Circumvention/Sev

erability

Yes 

§ 63.5(a)(1)-

(b)(2)

Construction/Reco

nstruction 

Applicability 

Yes 

§ 63.5(b)(31)-

(4)

Existing, New, 

Reconstructed 

Sources 

Requirements

Yes 

63.5(b)(2) No [Reserved]. 

63.5(b)(5) No [Reserved]. 

§ 63.5(b)(3)-

(b)(6) 

 Yes 

§ 63.5(c) No [Reserved]. 

§ 63.5(d)-(f) Application for 

Approval of 

Construction/Reco

nstruction

Yes 

63.5(e) Approval of 

Construction/Reco

nstruction 

Yes 

63.5(f) Approval of 

Construction/Reco

nstruction Based 

on State Review 

Yes 

§ 63.6(a)-(d) Compliance with 

Standards and 

Maintenance 

Applicability

Yes 

63.6(b)(1)-

(b)(5) 

New and 

Reconstructed 

Sources Dates

Yes 

63.6(b)(6) No [Reserved]. 

63.6(b)(7) Yes 
Page 41 of 53 

General 

provisions 

citation 

Requirement Applies to 

subpart DDD? Explanation 

63.6(c)(1) Existing Sources 

Dates 

Yes §63.1180 

specifies 

compliance 

dates. 

63.6(c)(2) Yes 

63.6(c)(3)-

(c)(4) 

 No [Reserved]. 

63.6(c)(5) Yes 

63.6(d) No [Reserved]. 

63.6(e)(1)-

(e)(2) 

Operation & 

Maintenance 

Requirements 

Yes §63.1187 

specifies 

additional 

requirements.

§ 63.6(e)(1)(i) General Duty to 

Mminimize 

Eemissions 

No See § 

63.1180(d) 

for general 

duty 

requirement. 

§ 63.6(e)(1)(ii) Requirement to 

Ccorrect 

Mmalfunctions Aas 

Ssoon Aas 

Ppossible 

No § 63.1187(b) 

specifies 

additional 

requirements.

§ 

63.6(e)(1)(iii) 

 Yes 

§ 63.6(e)(2) No [Reserved] 

§ 63.6(e)(3) Startup, 

Shutdown, and 

Malfunction (SSM) 

Plan 

YesNo Startups and 

shutdowns 

addressed in 

§ 63.1197.

§ 63.6(f)(1) Compliance with 

Emission 

StandardsSSM 

Eexemption

YesNo
Page 42 of 53 

General 

provisions 

citation 

Requirement Applies to 

subpart DDD? Explanation 

§ 63.6(f)(2)-(g) Yes 

63.6(g) Alternative 

Standard

Yes 

63.6(h) Compliance with 

Opacity/VE 

Standards 

No Subpart DDD 

does not 

include 

VE/opacity 

standards. 

§ 63.6(h)(1) SSM exemption No 

§ 63.6(h)(2)-(j) Yes

63.6(i)(1)-

(i)(14) 

Extension of 

Compliance 

Yes §63.1180 

specifies 

date. 

63.6(i)(15) No [Reserved]. 

63.6(i)(16) Yes 

63.6(j) Exemption from 

Compliance 

Yes 

§ 63.7(a)-(d) Performance 

TTtesting

RRrequirements 

Applicability

Yes 

63.7(b) Notification Yes 

63.7(c) Quality 

Assurance/Test 

Plan 

Yes 

63.7(d) Testing 

Facilities 

Yes 

§ 63.7(e)(1) Conduct of 

performance 

Ttests 

YesNo See §

63.11808 

specifies 

additional 

requirements.

§ 63.7(e)(2)-(f) Yes 

63.7(f) Alternative Test 

Method 

Yes 

§ 63.7(g)(1) Data Analysis, 

Recordkeeping, 

and Reporting

Yes 

§ 63.7(g)(2) No [Reserved]. 
Page 43 of 53 

General 

provisions 

citation 

Requirement Applies to 

subpart DDD? Explanation 

§ 63.7(g)(3)-(h) Yes 

63.7(h) Waiver of Tests Yes 

§ 63.8(a)(1)-(b) Monitoring 

RRrequirements 

Applicability

Yes 

63.8(a)(2) No Subpart DDD 

does not 

require CMS 

performance 

specification

s. 

63.8(a)(3) No [Reserved]. 

63.8(a)(4) Yes 

63.8(b) Conduct of 

Monitoring 

Yes 

§ 63.8(c)(1)(i)-

(c)(3)

General Dduty to 

Mminimize 

Eemissions and 

CMS 

OOoperation/Maint

enance

YesNo See § 

63.1180(e) 

for general 

duty 

requirement.

§ 63.8(c)(1)(ii) Yes 

§ 

63.8(c)(1)(iii) 

Requirement to 

Ddevelop SSM Plan 

for CMS 

No 

63.8(c)(4)-

(c)(8) 

 No Subpart DDD 

does not 

require COMS 

or CMS 

performance 

specification

s. 

§ 63.8(c)(2)-

(d)(2) 

 Yes 

§ 63.8(d)(3) Written 

Pprocedures for 

CMS 

Yes, except 

for last 

sentence, 

which refers 

to SSM plan. 
Page 44 of 53 

General 

provisions 

citation 

Requirement Applies to 

subpart DDD? Explanation 

SSM plans are 

not required. 

63.8(d) Quality Control No Subpart DDD 

does not 

require a CMS 

quality 

control 

program. 

§ 63.8(e)-(g) Yes

63.8(e) CMS Performance 

Evaluation 

No Subpart DDD 

does not 

require CMS 

performance 

evaluations. 

63.8(f)(1)-

(f)(5) 

Alternative 

Monitoring Method 

Yes 

63.8(f)(6) Alternative to 

RATA Test 

No Subpart DDD 

does not 

require CEMS.

63.8(g)(1) Data Reduction Yes 

63.8(g)(2) No Subpart DDD 

does not 

require COMS 

or CEMS. 

63.8(g)(3)-

(g)(5) 

 Yes 

§ 63.9(a) Notification 

Requirements 

Applicability and 

Ggeneral 

Iinformation

Yes 

§ 63.9(b)(1)-(2) Initial 

Notifications 

Yes 

§ 63.9(b)(3) No [Reserved]. 

§ 63.9(b)(4)-(5) Yes 

§ 63.9(c)-(j) Request for 

Compliance 

Extension

Yes 

63.9(d) New Source 

Notification for 

Yes 
Page 45 of 53 

General 

provisions 

citation 

Requirement Applies to 

subpart DDD? Explanation 

Special 

Compliance 

Requirements 

63.9(e) Notification of 

Performance Test 

Yes 

63.9(f) Notification of 

VE/Opacity Test 

No Subpart DDD 

does not 

include 

VE/opacity 

standards. 

63.9(g) Additional CMS 

Notifications 

No Subpart DDD 

does not 

require CMS 

performance 

evaluation, 

COMS, or 

CEMS. 

63.9(h)(1)-

(h)(3) 

Notification of 

Compliance Status 

Yes 

63.9(h)(4) No [Reserved]. 

63.9(h)(5)-

(h)(6) 

 Yes 

63.9(i) Adjustment of 

Deadlines 

Yes 

63.9(j) Change in 

Previous 

Information 

Yes 

§ 63.10(a) Recordkeeping/ 

and RRreportingApplicability 

Rrequirements

Yes 

§ 63.10(b)(1) General 

RRrecordkeeping 

RRrequirements 

Yes §63.1192 

includes 

additional 

requirements.

§ 63.10(b)(2)(i) Recordkeeping of 

Ooccurrence and 

Dduration of 

Sstartups and 

Sshutdowns 

No 
Page 46 of 53 

General 

provisions 

citation 

Requirement Applies to 

subpart DDD? Explanation 

§ 

63.10(b)(2)(ii) 

Recordkeeping of 

Mmalfunctions 

No See § 

63.1193(c) 

for 

recordkeeping 

of (ii) 

occurrence 

and duration 

and (iii) 

actions taken 

during 

malfunction.

§ 

63.10(b)(2)(iii)

Maintenance 

Rrecords 

Yes 

§ 

63.10(b)(2)(iv)-

(v) 

Actions taken to 

minimize 

emissions during 

SSM 

No 

§ 

63.10(b)(2)(vi) 

Recordkeeping for 

CMS malfunctions 

Yes 

§ 

63.10(b)(2)(vii)

-(xiv) 

Other CMS 

requirements 

Yes 

§ 63.10(b)(3) 

Recordkeeping 

Rrequirement for 

Aapplicability 

Ddeterminations 

Yes 

§ 63.10(c)(1)-

(6)

Additional CMS 

RRrecordkeeping

Rrequirements for 

Ssources with CMS

Yes 

§63.10(c)(2)-

(c)(4) 

 No [Reserved]. 

§63.10(c)(5) Yes 

§63.10(c)(6) No Subpart DDD 

does not 

require CMS 

performance 

specification

s. 

§ 63.10(c)(7)-

(c)(8) 

Additional 

Rrecordkeeping 

Yes 

Formatted Table
Page 47 of 53 

General 

provisions 

citation 

Requirement Applies to 

subpart DDD? Explanation 

Rrequirements for 

CMS – 

Iidentifying 

Eexceedances and 

Eexcess 

Eemissions

§ 63.10(c)(9) No [Reserved]. 

§ 63.10(c)(10)-

(c)(1311) 

YesNo See § 63.1192 

for 

recordkeeping 

of 

malfunctions.

§ 63.10(c)(12)-

(14) 

NoYes Subpart DDD 

does not 

require a CMS 

quality 

control 

program.

§ 63.10(c)(15) Use of SSM Plan YesNo

§ 63.10(d)(1)-

(4)

General Reporting 

Requirements 

Yes Additional 

requirements 

in §63.1193.

§63.10(d)(2) Performance Test 

Results 

Yes 

§63.10(d)(3) Opacity or VE 

Observations 

No Subpart DDD 

does not 

include 

VE/opacity 

standards. 

§ 63.10(d)(4)-

(d)(5) 

Progress Reports/ 

Startup, 

Shutdown, and 

Malfunction

Reports 

YesNo See § 

63.1193(f) 

for reporting 

of 

malfunctions.

§ 63.10(e)(1)-

(e)(2)(f)

Additional CMS 

Reports Excess 

Emission/CMS 

Performance 

Reports COMS Data 

Reports 

NoYes Subpart DDD 

does not 

require CEMS 

or CMS 

performance 

evaluations. 
Page 48 of 53 

General 

provisions 

citation 

Requirement Applies to 

subpart DDD? Explanation 

Recordkeeping/Rep

orting Waiver

§63.10(e)(3) Excess 

Emissions/CMS 

Performance 

Reports 

Yes 

§63.10(e)(4) COMS Data Reports No Subpart DDD 

does not 

require COMS.

§63.10(f) Recordkeeping/Rep

orting Waiver 

Yes 

§ 63.11(a)-(b) Control Device 

Requirements 

Applicability

Flares

YesNo Flares will 

not be used 

to comply 

with the 

emissions 

limits.

§63.11(b) Flares No Flares not 

applicable.

§ 63.11(c) Alternative Work 

Practice for 

Monitoring 

Equipment for 

Leaks 

Yes 

§ 63.11(d) Alternative Work 

Practice Standard 

Yes 

§ 63.11(e) Yes 

§ 63.12 State Authority 

and Delegations 

Yes 

§ 63.13 Addresses Yes 

§ 63.14 Incorporation by 

Reference 

Yes 

§ 63.15 Information 

Availability/Conf

identiality 

Yes 

§ 63.16 Performance Track 

Provisions Yes
Page 49 of 53 

Appendix A to Subpart DDD of Part 63—Free Formaldehyde Analysis 

of Insulation Resins by the Hydroxylamine Hydrochloride Method 

1. Scope 

The method in this appendix was specifically developed for 

water-soluble phenolic resins that have a relatively high freeformaldehyde (FF) content such as insulation resins. It may also 

be suitable for other phenolic resins, especially those with a 

high FF content. 

2. Principle 

2.1 a. The basis for this method is the titration of the 

hydrochloric acid that is liberated when hydroxylamine 

hydrochloride reacts with formaldehyde to form formaldoxine: 

HCHO + NH2OH:HCl → CH2:NOH + H2O + HCl

b. Free formaldehyde in phenolic resins is present as 

monomeric formaldehyde, hemiformals, polyoxymethylene 

hemiformals, and polyoxymethylene glycols. Monomeric 

formaldehyde and hemiformals react rapidly with hydroxylamine 

hydrochloride, but the polymeric forms of formaldehyde must 

hydrolyze to the monomeric state before they can react. The 

greater the concentration of free formaldehyde in a resin, the 

more of that formaldehyde will be in the polymeric form. The 

hydrolysis of these polymers is catalyzed by hydrogen ions. 

2.2 The resin sample being analyzed must contain enough 

free formaldehyde so that the initial reaction with
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hydroxylamine hydrochloride will produce sufficient hydrogen 

ions to catalyze the depolymerization of the polymeric 

formaldehyde within the time limits of the test method. The 

sample should contain approximately 0.3 grams (g) free 

formaldehyde to ensure complete reaction within 5 minutes. 

3. Apparatus 

3.1 Balance, readable to 0.01 g or better. 

3.2 pH meter, standardized to pH 4.0 with pH 4.0 buffer and 

pH 7 with pH 7.0 buffer. 

3.3 50-mL burette for 1.0 N sodium hydroxide. 

3.4 Magnetic stirrer and stir bars. 

3.5 250-mL beaker. 

3.6 50-mL graduated cylinder. 

3.7 100-mL graduated cylinder. 

3.8 Timer. 

4. Reagents 

4.1 Standardized 1.0 N sodium hydroxide solution. 

4.2 Hydroxylamine hydrochloride solution, 100 grams per 

liter, pH adjusted to 4.00. 

4.3 Hydrochloric acid solution, 1.0 N and 0.1 N. 

4.4 Sodium hydroxide solution, 0.1 N. 

4.5 50/50 v/v mixture of distilled water and methyl

alcohol. 

5. Procedure 
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5.1 Determine the sample size as follows: 

a. If the expected FF is greater than 2 percent, go to Part 

A in 5.1.c to determine sample size. 

b. If the expected FF is less than 2 percent, go to Part B 

in 5.1.d to determine sample size. 

c. Part A: Expected FF ≥2 percent. 

Grams resin = 60/expected percent FF 

I. The following table shows example levels: 

Expected percent free formaldehyde Sample size, grams 

2 30.0 

5 12.0 

8 7.5 

10 6.0 

12 5.0 

15 4.0 

ii. It is very important to the accuracy of the results 

that the sample size be chosen correctly. If the milliliters of 

titrant are less than 15 mL or greater than 30 mL, reestimate 

the needed sample size and repeat the tests. 

d. Part B: Expected FF <2 percent 

Grams resin = 30/expected percent FF 

I. The following table shows example levels: 
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Expected percent free formaldehyde Sample size, grams 

2 15 

1 30 

0.5 60 

ii. If the milliliters of titrant are less than 5 mL or 

greater than 30 mL, reestimate the needed sample size and repeat 

the tests. 

5.2 Weigh the resin sample to the nearest 0.01 grams into a 

250-mL beaker. Record sample weight. 

5.3 Add 100 mL of the methanol/water mixture and stir on a 

magnetic stirrer. Confirm that the resin has dissolved. 

5.4 Adjust the resin/solvent solution to pH 4.0, using the 

prestandardized pH meter, 1.0 N hydrochloric acid, 0.1 N 

hydrochloric acid, and 0.1 N sodium hydroxide. 

5.5 Add 50 mL of the hydroxylamine hydrochloride solution, 

measured with a graduated cylinder. Start the timer. 

5.6 Stir for 5 minutes. Titrate to pH 4.0 with standardized 

1.0 N sodium hydroxide. Record the milliliters of titrant and 

the normality. 

6. Calculations 

7. Method Precision and Accuracy 

Test values should conform to the following statistical 

precision: 
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Variance = 0.005 

Standard deviation = 0.07 

95% Confidence Interval, for a single determination = 0.2 

8. Author 

This method was prepared by K.K. Tutin and M.L. Foster, 

Tacoma R&D Laboratory, Georgia-Pacific Resins, Inc. (Principle 

written by R. R. Conner.) 

9. References 

9.1 GPAM 2221.2. 

9.2 PR&C TM 2.035. 

9.3 Project Report, Comparison of Free Formaldehyde

Procedures, January 1990, K. Tutin.