Terms used in this subpart are defined the Clean Air Act, in Sec. 63.2, and in this section as follows:
Administrator means the Administrator of the United States Environmental Protection Agency or his or her authorized representative (e.g., a State that has been delegated the authority to implement the provisions of this part).
Binder application vacuum exhaust means the exhaust from the vacuum system used to remove excess resin solution from the wet-formed fiberglass mat before it enters the drying and curing oven.
Deviation means any instance in which an affected source subject to this subpart, or an owner or operator of such a source:
(1) Fails to meet any requirement or obligation established by this subpart, including but not limited to any emission limit, or operating limit, or work practice standard;
(2) Fails to meet any term or condition that is adopted to implement an applicable requirement in this subpart and that is included in the operating permit for any affected source required to obtain such a permit; or
(3) Fails to meet any emission limit, or operating limit, or work practice standard in this subpart during startup, shutdown, or malfunction, regardless of whether or not such failure is permitted by this subpart.
Drying and curing oven means the process section that evaporates excess moisture from a fiberglass mat and cures the resin that binds the fibers.
Emission limitation means an emission limit, operating limit, or work practice standard.
Fiberglass mat production rate means the weight of finished fiberglass mat produced per hour of production including any trim removed after the binder is applied and before final packaging.
Loss-on-ignition means the percentage decrease in weight of fiberglass mat measured before and after it has been ignited to burn off the applied binder. The loss-on-ignition is used to monitor the weight percent of binder in fiberglass mat.
Nonwoven wet-formed fiberglass mat manufacturing means the production of a fiberglass mat by bonding glass fibers to each other using a resin solution. Nonwoven wet-formed fiberglass mat manufacturing is also referred to as wet-formed fiberglass mat manufacturing.
Roofing square means the amount of finished product needed to cover an area 10 feet by 10 feet (100 square feet) of finished roof.
Thermal oxidizer means an air pollution control device that uses controlled flame combustion inside a combustion chamber to convert combustible materials to noncombustible gases.
Urea-formaldehyde content in binder formulation means the mass-based percent of urea-formaldehyde resin in the total binder mix as it is applied to the glass fibers to form the mat. Sec. Sec. 63.3005-63.3079 [Reserved]
Sec. Table 1 to Subpart HHHH of Part 63--Minimum Requirements for
Monitoring and Recordkeeping
As stated in Sec. 63.2998(c), you must comply with the minimum requirements for monitoring and recordkeeping in the following table: ------------------------------------------------------------------------
You must monitor these And record for the
parameters: At this frequency: monitored perameter:------------------------------------------------------------------------1. Thermal oxidizer Continuously........ 15-minute and 3-hour
temperature \a\. block averages.2. Other process or control As specified in your As specified in your
device parameters specified OMM plan. OMM plan.
in your OMM \b\ plan.3. Urea-formaldehyde resin On each operating The average lb/hr
solids application rate. day, calculate the value for each
average lb/hr product
application rate manufactured during
for each product the day.
manufactured during
that day.4. Resin free-formaldehyde For each lot of The value for each
content. resin purchased. lot used during the
operating day.5. Loss-on-ignition \c\..... Measured at least The value for each
once per day, for product
each product manufactured during
manufactured during the operating day.
that day.6. UF-to-latex ratio in the For each batch of The value for each
binder \c\. binder prepared the batch of binder
operating day. prepared during the
operating day.7. Weight of the final mat Each product The value for each
product per square (lb/ manufactured during product
roofing square)\c\. the operating day. manufactured during
the operating day.8. Average nonwoven wet- For each product The average value
formed fiberglass mat manufactured during for each product
production rate (roofing the operating day. manufactured during
squares per the hour) \c\. operating day.------------------------------------------------------------------------\a\ Required if a thermal oxidizer is used to control formaldehyde
emissions.\b\ Required if process modifications or a control device other than a
thermal oxidizer is used to control emissions.\c\ These parameters must be monitored and values recorded, but no
operating limits apply.
Sec. Table 2 to Subpart HHHH of Part 63--Applicability of General
Provisions (40 CFR Part 63, Subpart A) to Subpart HHHH
As stated in Sec. 63.3001, you must comply with the applicable General Provisions requirements according to the following table: ----------------------------------------------------------------------------------------------------------------
Citation Requirement Applies to subpart HHHH Explanation----------------------------------------------------------------------------------------------------------------Sec. 63.1(a)(1)-(4)................ General Applicability.. Yes....................Sec. 63.1(a)(5).................... ....................... No..................... [Reserved].Sec. 63.1(a)(6)-(8)................ ....................... Yes....................Sec. 63.1(a)(9).................... ....................... No..................... [Reserved].Sec. 63.1(a)(10)-(14).............. ....................... Yes....................Sec. 63.1(b)....................... Initial Applicability Yes....................
Determination.Sec. 63.1(c)(1).................... Applicability After Yes....................
Standard Established.Sec. 63.1(c)(2).................... ....................... Yes.................... Some plants may be area
sources.Sec. 63.1(c)(3).................... ....................... No..................... [Reserved].Sec. 63.1(c)(4)-(5)................ ....................... Yes....................Sec. 63.1(d)....................... ....................... No..................... [Reserved].Sec. 63.1(e)....................... Applicability of Permit Yes....................
Program.Sec. 63.2.......................... Definitions............ Yes.................... Additional definitions
in Sec. 63.3004.Sec. 63.3.......................... Units and Abbreviations Yes....................Sec. 63.4(a)(1)-(3)................ Prohibited Activities.. Yes....................Sec. 63.4(a)(4).................... ....................... No..................... [Reserved].Sec. 63.4(a)(5).................... ....................... Yes....................Sec. 63.4(b)-(c)................... Circumvention/ Yes....................
Severability.Sec. 63.5(a)....................... Construction/ Yes....................
Reconstruction.Sec. 63.5(b)(1).................... Existing/Constructed/ Yes....................
Reconstruction.Sec. 63.5(b)(2).................... ....................... No..................... [Reserved].Sec. 63.5(b)(3)-(6)................ ....................... Yes....................Sec. 63.5(c)....................... ....................... No..................... [Reserved].Sec. 63.5(d)....................... Application for Yes....................
Approval of
Construction/
Reconstruction.
Sec. 63.5(e)....................... Approval of Yes....................
Construction/
Reconstruction.Sec. 63.5(f)....................... Approval of Yes....................
Construction/
Reconstruction Based
on State Review.Sec. 63.6(a)....................... Compliance with Yes....................
Standards and
Maintenance--Applicabi
lity.Sec. 63.6(b)(1)-(5)................ New and Reconstructed Yes....................
Sources-Dates.Sec. 63.6(b)(6).................... ....................... No..................... [Reserved].Sec. 63.6(b)(7).................... ....................... Yes....................Sec. 63.6(c)(1)-(2)................ Existing Sources Dates. Yes.................... Sec. 63.2985
specifies dates.Sec. 63.6(c)(3)-(4)................ ....................... No..................... [Reserved].Sec. 63.6(c)(5).................... ....................... Yes....................Sec. 63.6(d)....................... ....................... No..................... [Reserved].Sec. 63.6(e)....................... Operation and Yes.................... Sec. Sec. 63.2984
Maintenance and 63.2987 specify
Requirements. additional
requirements.Sec. 63.6(f)....................... Compliance with Yes....................
Emission Standards.Sec. 63.6(g)....................... Alternative Standard... Yes.................... EPA retains approval
authority.Sec. 63.6(h)....................... Compliance with Opacity/ No..................... Subpart HHHH does not
Visible Emissions specify opacity or
Standards. visible emission
standards.Sec. 63.6(i)(1)-(14)............... Extension of Compliance Yes....................Sec. 63.6(i)(15)................... ....................... No..................... [Reserved].Sec. 63.6(i)(16)................... ....................... Yes....................Sec. 63.6(j)....................... Exemption from Yes....................
Compliance.Sec. 63.7(a)....................... Performance Test Yes....................
Requirements--Applicab
ility and Dates.Sec. 63.7(b)....................... Notification of Yes....................
Performance Test.Sec. 63.7(c)....................... Quality Assurance Yes....................
Program/Test Plan.Sec. 63.7(d)....................... Testing Facilities..... Yes....................Sec. 63.7(e)....................... Conduct of Tests....... Yes.................... Sec. 63.2991-63.2994
specify additional
requirements.Sec. 63.7(f)....................... Alternative Test Method Yes.................... EPA retains approval
authoritySec. 63.7(g)....................... Data Analysis.......... Yes....................Sec. 63.7(h)....................... Waiver of Tests........ Yes....................Sec. 63.8(a)(1)-(2)................ Monitoring Yes....................
Requirements--Applicab
ility.Sec. 63.8(a)(3).................... ....................... No..................... [Reserved].Sec. 63.8(a)(4).................... ....................... Yes....................Sec. 63.8(b)....................... Conduct of Monitoring.. Yes....................Sec. 63.8(c)(1)-(3)................ Continuous Monitoring Yes....................
System (CMS) Operation
and Maintenance.Sec. 63.8(c)(4).................... ....................... Yes....................Sec. 63.8(c)(5).................... ....................... No..................... Subpart HHHH does not
specify opacity or
visible emission
standardsSec. 63.8(c)(6)-(8)................ ....................... Yes....................Sec. 63.8(d)....................... Quality Control........ Yes....................Sec. 63.8(e)....................... CMS Performance Yes....................
Evaluation.Sec. 63.8(f)(1)-(5)................ Alternative Monitoring Yes.................... EPA retains approval
Method. authoritySec. 63.8(f)(6).................... Alternative to Relative No..................... Subpart HHHH does not
Accuracy Test. require the use of
continuous emissions
monitoring systems
(CEMS)Sec. 63.8(g)(1).................... Data Reduction......... Yes....................Sec. 63.8(g)(2).................... Data Reduction......... No..................... Subpart HHHH does not
require the use of
CEMS or continuous
opacity monitoring
systems (COMS).Sec. 63.8(g)(3)-(5)................ Data Reduction......... Yes....................Sec. 63.9(a)....................... Notification Yes....................
Requirements--Applicab
ility.Sec. 63.9(b)....................... Initial Notifications.. Yes....................Sec. 63.9(c)....................... Request for Compliance Yes....................
Extension.Sec. 63.9(d)....................... New Source Notification Yes....................
for Special Compliance
Requirements.Sec. 63.9(e)....................... Notification of Yes....................
Performance Test.
Sec. 63.9(f)....................... Notification of Visible No..................... Subpart HHHH does not
Emissions/Opacity Test. specify opacity or
visible emission
standards.Sec. 63.9(g)(1).................... Additional CMS Yes....................
Notifications.Sec. 63.9(g)(2)-(3)................ ....................... No..................... Subpart HHHH does not
require the use of
COMS or CEMS.Sec. 63.9(h)(1)-(3)................ Notification of Yes.................... Sec. 63.3000(b)
Compliance Status. specifies additional
requirements.Sec. 63.9(h)(4).................... ....................... No..................... [Reserved].Sec. 63.9(h)(5)-(6)................ ....................... Yes....................Sec. 63.9(i)....................... Adjustment of Deadlines Yes....................Sec. 63.9(j)....................... Change in Previous Yes....................
Information.Sec. 63.10(a)...................... Recordkeeping/ Yes....................
Reporting--Applicabili
ty.Sec. 63.10(b)...................... General Recordkeeping Yes.................... Sec. 63.2998 includes
Requirements. additional
requirements.Sec. 63.10(c)(1)................... Additional CMS Yes....................
Recordkeeping.Sec. 63.10(c)(2)-(4)............... ....................... No..................... [Reserved].Sec. 63.10(c)(5)-(8)............... ....................... Yes....................Sec. 63.10(c)(9)................... ....................... No..................... [Reserved].Sec. 63.10(c)(10)-(15)............. ....................... Yes....................Sec. 63.10(d)(1)................... General Reporting Yes.................... Sec. 63.3000 includes
Requirements. additional
requirements.Sec. 63.10(d)(2)................... Performance Test Yes.................... Sec. 63.3000 includes
Results. additional
requirementsSec. 63.10(d)(3)................... Opacity or Visible No..................... Subpart HHHH does not
Emissions specify opacity or
Observations. visible emission
standards.Sec. 63.10(d)(4)-(5)............... Progress Reports/ Yes....................
Startup, Shutdown, and
Malfunction Reports.Sec. 63.10(e)(1)................... Additional CMS Reports-- No..................... Subpart HHHH does not
General. require CEMS.Sec. 63.10(e)(2)................... Reporting results of Yes....................
CMS performance
evaluations.Sec. 63.10(e)(3)................... Excess Emission/CMS Yes....................
Performance Reports.Sec. 63.10(e)(4)................... COMS Data Reports...... No..................... Subpart HHHH does not
specify opacity or
visible emission
standards.Sec. 63.10(f)...................... Recordkeeping/Reporting Yes.................... EPA retains approval
Waiver. authoritySec. 63.11......................... Control Device No..................... Facilities subject to
Requirments--Applicabi subpart HHHH do not
lity. use flares as control
devices.Sec. 63.12......................... State Authority and Yes....................
Delegations.Sec. 63.13......................... Addresses.............. Yes....................Sec. 63.14......................... Incorporation by No.....................
Reference.Sec. 63.15......................... Availability of Yes....................
Information/
Confidentiality.---------------------------------------------------------------------------------------------------------------- Sec. Appendix A to Subpart HHHH of Part 63--Method for Determining Free-
Formaldehyde in Urea-Formaldehyde Resins by Sodium Sulfite (Iced &
Cooled)
1.0 Scope
This procedure corresponds to the Housing and Urban Development method of determining free-formaldehyde in urea-formaldehyde resins. This method applies to samples that decompose to yield formaldehyde under the conditions of other free-formaldehyde methods. The primary use is for urea-formaldehyde resins.
2.0 Part A--Testing Resins
Formaldehyde will react with sodium sulfite to form the sulfite addition products and liberate sodium hydroxide (NaOH); however, at room temperature, the methanol groups present will also react to liberate NaOH. Titrate at 0 degrees Celsius (( [deg]deg;C) to minimize the reaction of the methanol groups.
2.1 Apparatus Required.
2.1.1 Ice crusher.
2.1.2 One 100-milliliter (mL) graduated cylinder.
2.1.3 Three 400-mL beakers.
2.1.4 One 50-mL burette.
2.1.5 Analytical balance accurate to 0.1 milligrams (mg).
2.1.6 Magnetic stirrer.
2.1.7 Magnetic stirring bars.
2.1.8 Disposable pipettes.
2.1.9 Several 5-ounce (oz.) plastic cups.
2.1.10 Ice cube trays (small cubes).
2.2 Materials Required.
2.2.1 Ice cubes (made with distilled water).
2.2.2 A solution of 1 molar (M) sodium sulfite (Na2SO3) (63 grams (g) Na2SO3/500 mL water (H2O) neutralized to thymolphthalein endpoint).
2.2.3 Standardized 0.1 normal (N) hydrochloric acid (HCl).
2.2.4 Thymolphthalein indicator (1.0 g thymolphthalein/199 g methanol).
2.2.5 Sodium chloride (NaCl) (reagent grade).
2.2.6 Sodium hydroxide (NaOH).
2.3 Procedure.
2.3.1 Prepare sufficient quantity of crushed ice for three determinations (two trays of cubes).
2.3.2 Put 70 cubic centimeters (cc) of 1 M Na2SO3 solution into a 400-mL beaker. Begin stirring and add approximately 100 g of crushed ice and 2 g of NaCl. Maintain 0 [deg]C during test, adding ice as necessary.
2.3.3 Add 10-15 drops of thymolphthalein indicator to the chilled solution. If the solution remains clear, add 0.1 N NaOH until the solution turns blue; then add 0.1 N HCl back to the colorless endpoint. If the solution turns blue upon adding the indicator, add 0.1 N HCl to the colorless endpoint.
2.3.4 On the analytical balance, accurately weigh the amount of resin indicated under the ``Resin Sample Size'' chart (see below) as follows.
Resin Sample Size------------------------------------------------------------------------
Sample
Approximate free HCHO (percent) weight
(gram(s))------------------------------------------------------------------------<0.5........................................................ 100.5-1.0..................................................... 51.0-3.0..................................................... 23.0......................................................... 1------------------------------------------------------------------------
2.3.4.1 Pour about 1 inch of resin into a 5 oz. plastic cup.
2.3.4.2 Determine the gross weight of the cup, resin, and disposable pipette (with the narrow tip broken off) fitted with a small rubber bulb.
2.3.4.3 Pipette out the desired amount of resin into the stirring, chilled solution (approximately 1.5 to 2 g per pipette-full).
2.3.4.4 Quickly reweigh the cup, resin, and pipette with the bulb.
2.3.4.5 The resultant weight loss equals the grams of resin being tested.
2.3.5 Rapidly titrate the solution with 0.1 N HCl to the colorless endpoint described in Step 3 (2.3.3).
2.3.6 Repeat the test in triplicate.
2.4 Calculation.
2.4.1 The percent free-formaldehyde (%HCHO) is calculated as follows:[GRAPHIC] [TIFF OMITTED] TR11AP02.024
2.4.2 Compute the average percent free-formaldehyde of the three tests.
(Note: If the results of the three tests are not within a range of 0.5 percent or if the average of the three tests does not meet expected limits, carry out Part B and then repeat Part A.)
3.0 Part B--Standard Check
Part B ensures that test reagents used in determining percent free-formaldehyde in urea-formaldehyde resins are of proper concentration and that operator technique is correct. Should any doubts arise in either of these areas, the formaldehyde standard solution test should be carried out.
3.1 Preparation and Standardization of a 1 Percent Formalin Solution.
Prepare a solution containing approximately 1 percent formaldehyde from a stock 37 percent formalin solution. Standardize the prepared solution by titrating the hydroxyl ions resulting from the formation of the formaldehyde bisulfite complex.
3.2 Apparatus Required.
Note: All reagents must be American Chemical Society analytical reagent grade or better.
3.2.1 One 1-liter (L) volumetric flask (class A).
3.2.2 One 250-mL volumetric flask (class A).
3.2.3 One 250-mL beaker.
3.2.4 One 100-mL pipette (class A).
3.2.5 One 10-mL pipette (class A).
3.2.6 One 50-mL graduated cylinder (class A).
3.2.7 A pH meter, standardized using pH 7 and pH 10 buffers.
3.2.8 Magnetic stirrer.
3.2.9 Magnetic stirring bars.
3.2.10 Several 5-oz. plastic cups.
3.2.11 Disposal pipettes.
3.2.12 Ice cube trays (small cubes).
3.3 Materials Required.
3.3.1 A solution of 37 percent formalin.
3.3.2 Anhydrous Na2SO3.
3.3.3 Distilled water.
3.3.4 Standardized 0.100 N HCl.
3.3.5 Thymolphthalein indicator (1.0 g thymolphthalein/199 g methanol).
3.4 Preparation of Solutions and Reagents.
3.4.1 Formaldehyde Standard Solution (approximately 1 percent). Measure, using a graduated cylinder, 27.0 mL of analytical reagent 37 percent formalin solution into a 1-L volumetric flask. Fill the flask to volume with distilled water.
(Note: You must standardize this solution as described in section 3.5. This solution is stable for 3 months.)
3.4.2 Sodium Sulfite Solution 1.0 M (used for standardization of Formaldehyde Standard Solution). Quantitatively transfer, using distilled water as the transfer solvent, 31.50 g of anhydrous Na2SO3 into a 250-mL volumetric flask. Dissolve in approximately 100 mL of distilled water and fill to volume.
(Note: You must prepare this solution daily, but the calibration of the Formaldehyde Standard Solution needs to be done only once.)
3.4.3 Hydrochloric Acid Standard Solution 0.100 M. This reagent should be readily available as a primary standard that only needs to be diluted.
3.5 Standardization.
3.5.1 Standardization of Formaldehyde Standard Solution.
3.5.1.1 Pipette 100.0 mL of 1 M sodium sulfite into a stirred 250-mL beaker.
3.5.1.2 Using a standardized pH meter, measure and record the pH. The pH should be around 10. It is not essential the pH be 10; however, it is essential that the value be accurately recorded.
3.5.1.3 To the stirring Na2SO3 solution, pipette in 10.0 mL of Formaldehyde Standard Solution. The pH should rise sharply to about 12.
3.5.1.4 Using the pH meter as a continuous monitor, titrate the solution back to the original exact pH using 0.100 N HCl. Record the milliliters of HCl used as titrant. (Note: Approximately 30 to 35 mL of HCl will be required.)
3.5.1.5 Calculate the concentration of the Formaldehyde Standard Solution using the equation as follows:[GRAPHIC] [TIFF OMITTED] TR11AP02.025
3.6 Procedure.
3.6.1 Prepare a sufficient quantity of crushed ice for three determinations (two trays of cubes).
3.6.2 Put 70 cc of 1 M Na2SO3 solution into a 400-mL beaker. Begin stirring and add approximately 100 g of crushed ice and 2 g NaCl. Maintain 0 [deg]C during the test, adding ice as necessary.
3.6.3 Add 10-15 drops of thymolphthalein indicator to the chilled solution. If the solution remains clear, add 0.1 N NaOH until the solution turns blue; then add 0.1 N HCl back to the colorless endpoint. If the solution turns blue upon adding the indicator, add 0.1 N HCl to the colorless endpoint.
3.6.4 On the analytical balance, accurately weigh a sample of Formaldehyde Standard Solution as follows.
3.6.4.1 Pour about 0.5 inches of Formaldehyde Standard Solution into a 5-oz. plastic cup.
3.6.4.2 Determine the gross weight of the cup, Formaldehyde Standard Solution, and a disposable pipette fitted with a small rubber bulb.
3.6.4.3 Pipette approximately 5 g of the Formaldehyde Standard Solution into the stirring, chilled Na2SO3 solution.
3.6.4.4 Quickly reweigh the cup, Formaldehyde Standard Solution, and pipette with the bulb.
3.6.4.5 The resultant weight loss equals the grams of Formaldehyde Standard Solution being tested.
3.6.5 Rapidly titrate the solution with 0.1 N HCl to the colorless endpoint in Step 3 (3.6.3).
3.6.6 Repeat the test in triplicate.
3.7 Calculation for Formaldehyde Standard Solution.
3.7.1 The percent free-formaldehyde (% HCHO) is calculated as follows:[GRAPHIC] [TIFF OMITTED] TR11AP02.026
3.7.2 The range of the results of three tests should be no more than 5 percent of the actual Formaldehyde Standard Solution concentration. Report results to two decimal places.
3.8 Reference.
West Coast Adhesive Manufacturers Trade Association Test 10.1. Sec. Appendix B to Subpart HHHH of Part 63--Method for the Determination
of Loss-on-Ignition
1.0 Purpose
The purpose of this test is to determine the loss-on-ignition (LOI) of wet-formed fiberglass mat.
2.0 Equipment
2.1 Scale sensitive to 0.001 gram (g).
2.2 Drying oven equipped with a means of constant temperature regulation and mechanical air convection.
2.3 Furnace designed to heat to at least 625 [deg]C (1,157 [deg]F) and controllable to 25 [deg]C (45 [deg]F).
2.4 Crucible, high form, 250 milliliter (mL).
2.5 Desiccator.
2.6 Pan balance (see Note 2 in 4.9)
3.0 Sample Collection Procedure
3.1 Obtain a sample of mat in accordance with Technical Association of the Pulp and Paper Industry (TAPPI) method 1007 ``Sample Location.''
3.2 Use a 5- to 10-g sample cut into pieces small enough to fit into the crucible.
3.3 Place the sample in the crucible. (Note 1: To test without the use of a crucible, see Note 2 after Section 4.8.)
3.4 Condition the sample in the furnace set at 105 3 [deg]C (221 9 [deg]F) for 5 minutes 30 seconds.
4.0 Procedure
4.1 Condition each sample by drying for 5 minutes 30 seconds at 105 3 [deg]C (22 5 [deg]F).
4.2 Remove the test sample from the furnace and cool in the desiccator for 30 minutes in the standard atmosphere for testing glass textiles.
4.3 Place the empty crucible in the furnace at 625 25 [deg]C (1,157 45 [deg]F). After 30 minutes, remove and cool the crucible in the standard atmosphere (TAPPI method 1008) for 30 minutes.
4.4 Identify each crucible with respect to each test sample of mat.
4.5 Weigh the empty crucible to the nearest 0.001 g. Record this weight as the tare mass, T.
4.6 Place the test sample in the crucible and weigh to the nearest 0.001 g. Record this weight as the initial mass, A.
4.7 Place the test sample and crucible in the furnace and ignite at 625 25 [deg]C (1,157 45 [deg]F).
4.8 After ignition for at least 30 minutes, remove the test sample and crucible from the furnace and cool in the desiccator for 30 minutes in the standard atmosphere (TAPPI method 1008).
4.9 Remove each crucible, and test each sample separately from the desiccator, and immediately weigh each sample to the nearest 0.001 g. Record this weight as the ignited mass, B. (Note 2: When it is known that no ash residue separates from the test sample during the weighing and igniting processes, you may weigh the sample separately without the crucible. When this occurs, the tare mass (T) equals zero. With appropriate care, you can dry and weigh a single piece of mat and place with tongs into the ignition oven on appropriate refractory supports. When the ignition time is over, remove the sample as an intact fragile web and weigh it directly on a pan balance.)
5.0 Calculation
5.1 Calculate the LOI for each sample as follows:
[GRAPHIC] [TIFF OMITTED] TR11AP02.027
Where: A = initial mass of crucible and sample before ignition (g);B = mass of crucible and glass residue after ignition (g); andT = tare mass of crucible, (g) (see Note 2).
5.2 Report the percent LOI of the glass mat to the nearest 0.1 percent.
6.0 Precision
The repeatability of this test method for measurements on adjacent specimens from the same sample of mat is better than 1 percent.
Subpart IIII_National Emission Standards for Hazardous Air Pollutants:
Surface Coating of Automobiles and Light-Duty Trucks
Source: 69 FR 22623, Apr. 26, 2004, unless otherwise noted.
What This Subpart Covers