18 operating requirements for thermal oxidizers.

( b) You must demonstrate initial compliance with each compliance option, operating requirement, and work practice requirement that applies to you according to Tables 5 and 6 of this subpart and according to § § 63.2260 through 63.2269 of this subpart.

( c) You must submit the Notification of Compliance Status containing the results of the initial compliance demonstration according to the requirements in § 63.2280( d).

§ 63.2261 By what date must I conduct performance tests or other initial compliance demonstrations?

( a) You must conduct performance tests upon initial startup or no later than 180 calendar days after the compliance date that is specified for your source in § 63.2233 and according to § 63.7( a)( 2), whichever is later.

( b) You must conduct initial compliance demonstrations that do not require performance tests upon initial startup or no later than 30 calendar days after the compliance date that is specified for your source in § 63.2233, whichever is later.

§ 63.2262 How do I conduct performance tests and establish operating requirements?

( a) You must conduct each performance test according to the requirements in § 63.7( e)( 1), the requirements in paragraphs ( b) through ( o) of this section, and according to the methods specified in Table 4 of this subpart. 19 ( b) Periods when performance tests must be conducted.

( 1) You must not conduct performance tests during periods of startup, shutdown, or malfunction, as specified in § 63.7( e)( 1).

( 2) You must test under representative operating conditions as defined in § 63.2292. You must describe representative operating conditions in your performance test report for the process and control systems and explain why they are representative.

( c) Number of test runs. You must conduct three separate test runs for each performance test required in this section, as specified in § 63.7( e)( 3). Each test run must last at least 1 hour except for: testing of a temporary total enclosure ( TTE) conducted using Methods 204A through 204F, which require three separate test runs of at least 3 hours each; and testing of an enclosure conducted using the alternative tracer gas method in appendix A to this subpart, which requires a minimum of three separate runs of at least 20 minutes each.

( d) Location of sampling sites.

( 1) Sampling sites must be located at the inlet ( if emission reduction testing or documentation of inlet methanol or formaldehyde concentration is required) and outlet of the control device and prior to any releases to the atmosphere. For HAP altering controls in sequence, such as a wet control device followed by a thermal oxidizer, 20 sampling sites must be located at the functional inlet of the control sequence ( e. g., prior to the wet control device)

and at the outlet of the control sequence ( e. g., thermal oxidizer outlet) and prior to any releases to the atmosphere.

( 2) Sampling sites for process units meeting compliance options without a control device must be located prior to any releases to the atmosphere. Facilities demonstrating compliance with a production based compliance option for a process unit equipped with a wet control device must locate sampling sites prior to the wet control device.

( e) Collection of monitoring data. You must collect operating parameter monitoring system or continuous emissions monitoring system ( CEMS) data at least every 15 minutes during the entire performance test and determine the parameter or concentration value for the operating requirement during the performance test using the methods specified in paragraphs ( k) through ( o) of this section.

( f) Collection of production data. To comply with any of the production based compliance options, you must measure and record the process unit throughput during each performance test.

( g) Nondetect data.

( 1) Except as specified in paragraph ( g)( 2) of this section, all nondetect data ( as defined in § 63.2292) must be 21 treated as one half of the method detection limit when determining total HAP, formaldehyde, methanol, or total hydrocarbon ( THC) emission rates.

( 2) When showing compliance with the production based compliance options in Table 1A of this subpart, you may treat emissions of an individual HAP as zero if all three of the performance test runs result in a nondetect measurement and the method detection limit is less than or equal to 1 parts per million by volume, dry ( ppmvd). Otherwise nondetect data ( as defined in § 63.2292) for individual HAP must be treated as one half of the method detection limit.

( h) Calculation of percent reduction across a control system. When determining the control system efficiency for any control system included in your emissions averaging plan ( not to exceed 90 percent) and when complying with any of the compliance options based on percent reduction across a control system in Table 1B of this subpart, as part of the performance test, you must calculate the percent reduction using Equation 1 of this section:

( Eq. 1) PR CE ER ER ER in out in = ×   ( ) 100 Where:

PR = percent reduction, percent CE = capture efficiency, percent ( determined for reconstituted wood product presses and board 22 coolers as required in Table 4 of this subpart) ERin = emission rate of total HAP ( calculated as the sum of the emission rates of acetaldehyde, acrolein, formaldehyde, methanol, phenol, and propionaldehyde), THC, formaldehyde, or methanol in the inlet vent stream of the control device, pounds per hour ERout = emission rate of total HAP ( calculated as the sum of the emission rates of acetaldehyde, acrolein, formaldehyde, methanol, phenol, and propionaldehyde), THC, formaldehyde, or methanol in the outlet vent stream of the control device, pounds per hour ( i) Calculation of mass per unit production. To comply with any of the production based compliance options in Table 1A of this subpart, you must calculate your mass per unit production emissions for each performance test run using Equation 2 of this section:

( Eq. 2) MP ER P CE HAP = × Where:

MP = mass per unit production, pounds per oven dried ton OR pounds per thousand square feet on a specified thickness basis; ( see paragraph ( j) of this section if you need to convert from one thickness basis to another) ERHAP = emission rate of total HAP ( calculated as the sum of the emission rates of acetaldehyde, acrolein, formaldehyde, methanol, phenol, and propionaldehyde) in the stack, pounds per hour P = process unit production rate ( throughput), oven dried tons per hour OR thousand square feet per hour on a specified thickness basis CE = capture efficiency, percent ( determined for reconstituted wood product presses and board coolers as required in Table 4 of this subpart) 23 ( j) Thickness basis conversion. Use Equation 3 of this section to convert from one thickness basis to another:

( Eq. 3) MSF MSF A B B A = × Where:

MSFA = thousand square feet on an A inch basis MSFB = thousand square feet on a B inch basis A = old thickness you are converting from, inches B = new thickness you are converting to, inches ( k) Establishing thermal oxidizer operating requirements. If you operate a thermal oxidizer, you must establish your thermal oxidizer operating parameters according to paragraphs ( k)( 1) through ( 3) of this section.

( 1) During the performance test, you must continuously monitor the firebox temperature during each of the required 1 hour test runs. For regenerative thermal oxidizers, you may measure the temperature in multiple locations ( for example, one location per burner) in the combustion chamber and calculate the average of the temperature measurements prior to reducing the temperature data to 15 minute averages for purposes of establishing your minimum firebox temperature. The minimum firebox temperature must then be established as the average of the three minimum 15 minute firebox temperatures monitored during the three test runs.

Multiple three run performance tests may be conducted to establish a range of parameter values under different 24 operating conditions.

( 2) You may establish a different minimum firebox temperature for your thermal oxidizer by submitting the notification specified in § 63.2280( g) and conducting a repeat performance test as specified in paragraph ( k)( 1) of this section that demonstrates compliance with the applicable compliance options of this subpart.

( 3) If your thermal oxidizer is a combustion unit that accepts process exhaust into the flame zone, then you are exempt from the performance testing and monitoring requirements specified in paragraphs ( k)( 1) and ( 2) of this section. To demonstrate initial compliance, you must submit documentation with your Notification of Compliance Status showing that process exhausts controlled by the combustion unit enter into the flame zone.

( l) Establishing catalytic oxidizer operating requirements. If you operate a catalytic oxidizer, you must establish your catalytic oxidizer operating parameters according to paragraphs ( l)( 1) and ( 2) of this section.

( 1) During the performance test, you must continuously monitor during the required 1 hour test runs either the temperature at the inlet to each catalyst bed or the temperature in the combustion chamber. For regenerative catalytic oxidizers, you must calculate the average of the temperature measurements from each catalyst bed inlet or within the combustion chamber prior to reducing the 25 temperature data to 15 minute averages for purposes of establishing your minimum catalytic oxidizer temperature.

The minimum catalytic oxidizer temperature must then be established as the average of the three minimum 15 minute temperatures monitored during the three test runs. Multiple three run performance tests may be conducted to establish a range of parameter values under different operating conditions.

( 2) You may establish a different minimum catalytic oxidizer temperature by submitting the notification specified in § 63.2280( g) and conducting a repeat performance test as specified in paragraphs ( l)( 1) and ( 2) of this section that demonstrates compliance with the applicable compliance options of this subpart.

( m) Establishing biofilter operating requirements. If you operate a biofilter, you must establish your biofilter operating requirements according to paragraphs ( m)( 1)

through ( 3) of this section.

( 1) During the performance test, you must continuously monitor the biofilter bed temperature during each of the required 1 hour test runs. To monitor biofilter bed temperature, you may use multiple thermocouples in representative locations throughout the biofilter bed and calculate the average biofilter bed temperature across these thermocouples prior to reducing the temperature data to 15

minute averages for purposes of establishing biofilter bed 26 temperature limits. The biofilter bed temperature range must be established as the minimum and maximum 15 minute biofilter bed temperatures monitored during the three test runs. You may base your biofilter bed temperature range on values recorded during previous performance tests provided that the data used to establish the temperature ranges have been obtained using the test methods required in this subpart. If you use data from previous performance tests,

you must certify that the biofilter and associated process unit( s) have not been modified subsequent to the date of the performance tests. Replacement of the biofilter media with the same type of material is not considered a modification of the biofilter for purposes of this section.

( 2) For a new biofilter installation, you will be allowed up to 180 days following the compliance date or 180 days following initial startup of the biofilter to complete the requirements in paragraph ( m)( 1) of this section.

( 3) You may expand your biofilter bed temperature operating range by submitting the notification specified in § 63.2280( g) and conducting a repeat performance test as specified in paragraph ( m)( 1) of this section that demonstrates compliance with the applicable compliance options of this subpart.

( n) Establishing operating requirements for process units meeting compliance options without a control device.

If you operate a process unit that meets a compliance option 27 in Table 1A of this subpart, or is a process unit that generates debits in an emissions average without the use of a control device, you must establish your process unit operating parameters according to paragraphs ( n)( 1) through ( 2) of this section.

( 1) During the performance test, you must identify and document the process unit controlling parameter( s) that affect total HAP emissions during the three run performance test. The controlling parameters you identify must coincide with the representative operating conditions you describe according to § 63.2262( b)( 2). For each parameter, you must specify appropriate monitoring methods, monitoring frequencies, and for continuously monitored parameters averaging times not to exceed 24 hours. The operating limit for each controlling parameter must then be established as the minimum, maximum, range, or average ( as appropriate depending on the parameter) recorded during the performance test. Multiple three run performance tests may be conducted to establish a range of parameter values under different operating conditions.

( 2) You may establish different controlling parameter limits for your process unit by submitting the notification specified in § 63.2280( g) and conducting a repeat performance test as specified in paragraph ( n)( 1) of this section that demonstrates compliance with the compliance options in Table 1A of this subpart or is used to establish emission 28 averaging debits for an uncontrolled process unit.

( o) Establishing operating requirements using total hydrocarbon ( THC) CEMS. If you choose to meet the operating requirements by monitoring THC concentration instead of monitoring control device or process operating parameters,

you must establish your THC concentration operating requirement according to paragraphs ( o)( 1) through ( 2) of this section.

( 1) During the performance test, you must continuously monitor THC concentration using your CEMS during each of the required 1 hour test runs. The maximum THC concentration must then be established as the average of the three maximum 15 minute THC concentrations monitored during the three test runs. Multiple three run performance tests may be conducted to establish a range of THC concentration values under different operating conditions.

( 2) You may establish a different maximum THC concentration by submitting the notification specified in § 63.2280( g) and conducting a repeat performance test as specified in paragraph ( o)( 1) of this section that demonstrates compliance with the compliance options in Tables 1A and 1B of this subpart.

§ 63.2263 Initial compliance demonstration for a dry rotary dryer.

If you operate a dry rotary dryer, you must demonstrate that your dryer processes furnish with an inlet moisture 29 content of less than or equal to 30 percent ( by weight, dry basis) and operates with a dryer inlet temperature of less than or equal to 600oF. You must designate and clearly identify each dry rotary dryer. You must record the inlet furnish moisture content ( dry basis) and inlet dryer operating temperature according to § 63.2269( a), ( b), and ( c)

and § 63.2270 for a minimum of 30 calendar days. You must submit the highest recorded 24 hour average inlet furnish moisture content and the highest recorded 24 hour average dryer inlet temperature with your Notification of Compliance Status. In addition, you must submit with the Notification of Compliance Status a signed statement by a responsible official that certifies with truth, accuracy, and completeness that the dry rotary dryer will dry furnish with a maximum inlet moisture content less than or equal to 30 percent ( by weight, dry basis) and will operate with a maximum inlet temperature of less than or equal to 600oF in the future.

§ 63.2264 Initial compliance demonstration for a hardwood veneer dryer.

If you operate a hardwood veneer dryer, you must record the annual volume percentage of softwood veneer species processed in the dryer as follows:

( a) Use Equation 1 of this section to calculate the annual volume percentage of softwood species dried: 30 ( Eq. 1) SW SW T % ( ) = 100 Where:

SW% = annual volume percent softwood species dried SW = softwood veneer dried during the previous 12 months, thousand square feet ( 3/ 8 inch basis) T = total softwood and hardwood veneer dried during the previous 12 months, thousand square feet ( 3/ 8 inch basis)

( b) You must designate and clearly identify each hardwood veneer dryer. Submit with the Notification of Compliance Status the annual volume percentage of softwood species dried in the dryer based on your dryer production for the 12 months prior to the compliance date specified for your source in § 63.2233. If you did not dry any softwood species in the dryer during the 12 months prior to the compliance date, then you need only to submit a statement indicating that no softwood species were dried. In addition, submit with the Notification of Compliance Status a signed statement by a responsible official that certifies with truth, accuracy, and completeness that the veneer dryer will be used to process less than 30 volume percent softwood species in the future.

§ 63.2265 Initial compliance demonstration for a softwood veneer dryer.

If you operate a softwood veneer dryer, you must develop a plan for review and approval for minimizing 31 fugitive emissions from the veneer dryer heated zones, and you must submit the plan with your Notification of Compliance Status.

§ 63.2266 Initial compliance demonstration for a veneer redryer.

If you operate a veneer redryer, you must record the inlet moisture content of the veneer processed in the redryer according to § 63.2269( a) and ( c) and § 63.2270 for a minimum of 30 calendar days. You must designate and clearly identify each veneer redryer. You must submit the highest recorded 24 hour average inlet veneer moisture content with your Notification of Compliance Status to show that your veneer redryer processes veneer with an inlet moisture content of less than or equal to 25 percent ( by weight, dry basis). In addition, submit with the Notification of Compliance Status a signed statement by a responsible official that certifies with truth, accuracy, and completeness that the veneer redryer will dry veneer with a moisture content less than 25 percent ( by weight, dry basis)

in the future.

§ 63.2267 Initial compliance demonstration for a reconstituted wood product press or board cooler.

If you operate a reconstituted wood product press at a new or existing affected source or a reconstituted wood product board cooler at a new affected source, then you must either use a wood products enclosure as defined in § 63.2292 32 or measure the capture efficiency of the capture device for the press or board cooler using Methods 204 and 204A through 204F of 40 CFR part 51, appendix M ( as appropriate) or using the alternative tracer gas method contained in appendix A to this subpart. You must submit documentation that the wood products enclosure meets the press enclosure design criteria in 63.2292 or the results of the capture efficiency verification with your Notification of Compliance Status.

§ 63.2268 Initial compliance demonstration for a wet control device.

If you use a wet control device as the sole means of reducing HAP emissions, you must develop and implement a plan for review and approval to address how organic HAP captured in the wastewater from the wet control device is contained or destroyed to minimize re release to the atmosphere such that the desired emission reduction is obtained. You must submit the plan with your Notification of Compliance Status.

§ 63.2269 What are my monitoring installation, operation,

and maintenance requirements?

( a) General continuous parameter monitoring requirements. You must install, operate, and maintain each continuous parameter monitoring system ( CPMS) according to paragraphs ( a)( 1) through ( 3) of this section.

( 1) The CPMS must be capable of completing a minimum of one cycle of operation ( sampling, analyzing, and 33 recording) for each successive 15 minute period.

( 2) At all times, you must maintain the monitoring equipment including, but not limited to, maintaining necessary parts for routine repairs of the monitoring equipment.

( 3) Record the results of each inspection,

calibration, and validation check.

( b) Temperature monitoring. For each temperature monitoring device, you must meet the requirements in paragraphs ( a) and ( b)( 1) through ( 6) of this section.

( 1) Locate the temperature sensor in a position that provides a representative temperature.

( 2) Use a temperature sensor with a minimum accuracy of 4oF or 0.75 percent of the temperature value, whichever is larger.

( 3) If a chart recorder is used, it must have a sensitivity with minor divisions not more than 20oF.

( 4) Perform an electronic calibration at least semiannually according to the procedures in the manufacturer's owners manual. Following the electronic calibration, you must conduct a temperature sensor validation check in which a second or redundant temperature sensor placed nearby the process temperature sensor must yield a reading within 30oF of the process temperature sensor's reading.

( 5) Conduct calibration and validation checks any time 34 the sensor exceeds the manufacturer's specified maximum operating temperature range or install a new temperature sensor.

( 6) At least quarterly, inspect all components for integrity and all electrical connections for continuity,

oxidation, and galvanic corrosion.

( c) Wood moisture monitoring. For each furnish or veneer moisture meter, you must meet the requirements in paragraphs ( a)( 1), ( 2), ( 4) and ( 5) and paragraphs ( c)( 1)

through ( 4) of this section.

( 1) For dry rotary dryers, use a continuous moisture monitor with a minimum accuracy of 1 percent ( dry basis)

moisture or better in the 25 to 35 percent ( dry basis)

moisture content range. For veneer redryers, use a continuous moisture monitor with a minimum accuracy of 3 percent ( dry basis) moisture or better in the 15 to 25 percent ( dry basis) moisture content range. Alternatively,

you may use a continuous moisture monitor with a minimum accuracy of 5 percent ( dry basis) moisture or better for dry rotary dryers used to dry furnish with less than 25 percent ( dry basis) moisture or for veneer redryers used to redry veneer with less than 20 percent ( dry basis) moisture.

( 2) Locate the moisture monitor in a position that provides a representative measure of furnish or veneer moisture.

( 3) Calibrate the moisture monitor based on the 35 procedures specified by the moisture monitor manufacturer at least once per semiannual compliance period ( or more frequently if recommended by the moisture monitor manufacturer).

( 4) At least quarterly, inspect all components of the moisture monitor for integrity and all electrical connections for continuity.

( 5) Use Equation 1 of this section to convert percent moisture measurements wet basis to a dry basis:

( )( ) MC MC / 100 1 MC / 100 100 dry wet wet =   ( Eq. 1)

Where:

MCdry = percent moisture content of wood material ( weight percent, dry basis) MCwet = percent moisture content of wood material ( weight percent, wet basis)

( d) Continuous emission monitoring system( s). Each CEMS must be installed, operated, and maintained according to paragraphs ( d)( 1) through ( 4) of this section.

( 1) Each CEMS for monitoring THC concentration must be installed, operated, and maintained according to Performance Specification 8 of 40 CFR part 60, appendix B. You must also comply with Procedure 1 of 40 CFR part 60, appendix F.

( 2) You must conduct a performance evaluation of each CEMS according to the requirements in 40 CFR 63.8 and according to Performance Specification 8 of 40 CFR part 60, 36 appendix B.

( 3) As specified in § 63.8( c)( 4)( ii), each CEMS must complete a minimum of one cycle of operation ( sampling,

analyzing, and data recording) for each successive 15 minute period.

( 4) The CEMS data must be reduced as specified in § 63.8( g)( 2) and § 63.2270( d) and ( e).

Continuous Compliance Requirements § 63.2270 How do I monitor and collect data to demonstrate continuous compliance?

( a) You must monitor and collect data according to this section.

( b) Except for, as appropriate, monitor malfunctions,

associated repairs, and required quality assurance or control activities ( including, as applicable, calibration checks and required zero and span adjustments), you must conduct all monitoring in continuous operation at all times that the process unit is operating. For purposes of calculating data averages, you must not use data recorded during monitoring malfunctions, associated repairs,

out of control periods, or required quality assurance or control activities. You must use all the data collected during all other periods in assessing compliance. A monitoring malfunction is any sudden, infrequent, not reasonably preventable failure of the monitoring to provide valid data. Monitoring failures that are caused in part by 37 poor maintenance or careless operation are not malfunctions.

Any period for which the monitoring system is out of control and data are not available for required calculations constitutes a deviation from the monitoring requirements.

( c) You may not use data recorded during monitoring malfunctions, associated repairs, and required quality assurance or control activities; data recorded during periods of startup, shutdown, and malfunction; or data recorded during periods of control device downtime covered in any approved routine control device maintenance exemption in data averages and calculations used to report emission or operating levels, nor may such data be used in fulfilling a minimum data availability requirement, if applicable. You must use all the data collected during all other periods in assessing the operation of the control system.

( d) Except as provided in paragraph ( e) of this section, determine the 3 hour block average of all recorded readings, calculated after every 3 hours of operation as the average of the evenly spaced recorded readings in the previous 3 operating hours ( excluding periods described in paragraphs ( b) and ( c) of this section).

( e) For dry rotary dryer and veneer redryer wood moisture monitoring, dry rotary dryer temperature monitoring, biofilter bed temperature monitoring, and biofilter outlet THC monitoring, determine the 24 hour block average of all recorded readings, calculated after every 24 38 hours of operation as the average of the evenly spaced recorded readings in the previous 24 operating hours ( excluding periods described in paragraphs ( b) and ( c) of this section).

( f) To calculate the data averages for each 3 hour or 24 hour averaging period, you must have at least 75 percent of the required recorded readings for that period using only recorded readings that are based on valid data ( i. e., not from periods described in paragraphs ( b) and ( c) of this section).

§ 63.2271 How do I demonstrate continuous compliance with the compliance options, operating requirements, and work practice requirements?

( a) You must demonstrate continuous compliance with the compliance options, operating requirements, and work practice requirements in § § 63.2240 and 63.2241 that apply to you according to the methods specified in Tables 7 and 8 of this subpart.

( b) You must report each instance in which you did not meet each compliance option, operating requirement, and work practice requirement in Tables 7 and 8 of this subpart that applies to you. This includes periods of startup, shutdown,

or malfunction and periods of control device maintenance specified in paragraphs ( b)( 1) through ( 3) of this section.

These instances are deviations from the compliance options,

operating requirements, and work practice requirements in 39 this subpart. These deviations must be reported according to the requirements in § 63.2281.

( 1) During periods of startup, shutdown, or malfunction, you must operate in accordance with the SSMP.

( 2) Consistent with § 63.6( e) and 63.7( e)( 1),

deviations that occur during a period of startup, shutdown,

or malfunction are not violations if you demonstrate to the Administrator's satisfaction that you were operating in accordance with the SSMP. The Administrator will determine whether deviations that occur during a period of startup,

shutdown, or malfunction are violations, according to the provisions in § 63.6( e).

( 3) Deviations that occur during periods of control device maintenance covered by any approved routine control device maintenance exemption are not violations if you demonstrate to the Administrator's satisfaction that you were operating in accordance with the approved routine control device maintenance exemption.

Notifications, Reports, and Records § 63.2280 What notifications must I submit and when?

( a) You must submit all of the notifications in § § 63.7( b) and ( c), 63.8( e), ( f)( 4) and ( f)( 6), 63.9 ( b)

through ( e), and ( g) and ( h) by the dates specified.

( b) You must submit an Initial Notification no later than 120 calendar days after the effective date of the subpart or after initial startup, whichever is later, as 40 specified in § 63.9( b)( 2).

( c) If you are required to conduct a performance test,

you must submit a written notification of intent to conduct a performance test at least 60 calendar days before the performance test is scheduled to begin as specified in § 63.7( b)( 1).

( d) If you are required to conduct a performance test,

design evaluation, or other initial compliance demonstration as specified in Tables 4, 5, and 6 of this subpart, you must submit a Notification of Compliance Status as specified in § 63.9( h)( 2)( ii).

( 1) For each initial compliance demonstration required in Table 5 or 6 of this subpart that does not include a performance test, you must submit the Notification of Compliance Status before the close of business on the 30th calendar day following the completion of the initial compliance demonstration.

( 2) For each initial compliance demonstration required in Tables 5 and 6 of this subpart that includes a performance test conducted according to the requirements in Table 4 of this subpart, you must submit the Notification of Compliance Status, including the performance test results,

before the close of business on the 60th calendar day following the completion of the performance test according to § 63.10( d)( 2).

( e) If you request a routine control device 41 maintenance exemption according to § 63.2251, you must submit your request for the exemption no later than 30 days before the compliance date.

( f) If you use the emissions averaging compliance option in § 63.2240( c), you must submit an Emissions Averaging Plan to the Administrator for approval no later than 1 year before the compliance date or no later than 1 year before the date you would begin using an emissions average, whichever is later. The Emissions Averaging Plan must include the information in paragraphs ( f)( 1) through ( 6) of this section.

( 1) Identification of all the process units to be included in the emissions average indicating which process units will be used to generate credits, and which process units that are subject to compliance options in Tables 1A and 1B of this subpart will be uncontrolled ( used to generate debits) or under controlled ( used to generate debits and credits).

( 2) Description of the control system used to generate emission credits for each process unit used to generate credits.

( 3) Determination of the total HAP control efficiency for the control system used to generate emission credits for each credit generating process unit.

( 4) Calculation of the RMR and AMR, as calculated using Equations 1 through 3 of § 63.2240( c)( 1). 42 ( 5) Documentation of total HAP measurements made according to § 63.2240( c)( 2)( iv) and other relevant documentation to support calculation of the RMR and AMR.

( 6) A summary of the operating parameters you will monitor and monitoring methods for each debit generating and credit generating process unit.

( g) You must notify the Administrator within 30 days before you take any of the actions specified in paragraphs ( g)( 1) through ( 3) of this section.

( 1) You modify or replace the control system for any process unit subject to the compliance options and operating requirements in this subpart.

( 2) You shut down any process unit included in your Emissions Averaging Plan.

( 3) You change a continuous monitoring parameter or the value or range of values of a continuous monitoring parameter for any process unit or control device.

§ 63.2281 What reports must I submit and when?

( a) You must submit each report in Table 9 of this subpart that applies to you.

( b) Unless the Administrator has approved a different schedule for submission of reports under § 63.10( a), you must submit each report by the date in Table 9 of this subpart and as specified in paragraphs ( b)( 1) through ( 5) of this section.

( 1) The first compliance report must cover the period 43 beginning on the compliance date that is specified for your affected source in § 63.2233 ending on June 30 or December 31, and lasting at least 6 months, but less than 12 months.

For example, if your compliance date is March 1, then the first semiannual reporting period would begin on March 1 and end on December 31.

( 2) The first compliance report must be postmarked or delivered no later than July 31 or January 31 for compliance periods ending on June 30 and December 31, respectively.

( 3) Each subsequent compliance report must cover the semiannual reporting period from January 1 through June 30 or the semiannual reporting period from July 1 through December 31.

( 4) Each subsequent compliance report must be postmarked or delivered no later than July 31 or January 31 for the semiannual reporting period ending on June 30 and December 31, respectively.

( 5) For each affected source that is subject to permitting regulations pursuant to 40 CFR part 70 or 71, and if the permitting authority has established dates for submitting semiannual reports pursuant to § 70.6( a)( 3)( iii)( A) or § 71.6( a)( 3)( iii)( A), you may submit the first and subsequent compliance reports according to the dates the permitting authority has established instead of according to the dates in paragraphs ( b)( 1) through ( 4) of this section. 44 ( c) The compliance report must contain the information in paragraphs ( c)( 1) through ( 8) of this section.

( 1) Company name and address.

( 2) Statement by a responsible official with that official's name, title, and signature, certifying the truth,

accuracy, and completeness of the content of the report.

( 3) Date of report and beginning and ending dates of the reporting period.

( 4) If you had a startup, shutdown, or malfunction during the reporting period and you took actions consistent with your SSMP, the compliance report must include the information specified in § 63.10( d)( 5)( i).

( 5) A description of control device maintenance performed while the control device was offline and one or more of the process units controlled by the control device was operating, including the information specified in paragraphs ( c)( 5)( i) through ( iii) of this section.

( i) The date and time when the control device was shut down and restarted.

( ii) Identification of the process units that were operating and the number of hours that each process unit operated while the control device was offline.

( iii) A statement of whether or not the control device maintenance was included in your approved routine control device maintenance exemption developed pursuant to § 63.2251.

If the control device maintenance was included in your 45 approved routine control device maintenance exemption, then you must report the information in paragraphs ( c)( 5)( iii)( A)

through ( C) of this section.

( A) The total amount of time that each process unit controlled by the control device operated during the semiannual compliance period and during the previous semiannual compliance period.

( B) The amount of time that each process unit controlled by the control device operated while the control device was down for maintenance covered under the routine control device maintenance exemption during the semiannual compliance period and during the previous semiannual compliance period.

( C) Based on the information recorded under paragraphs ( c)( 5)( iii)( A) and ( B) of this section for each process unit, compute the annual percent of process unit operating uptime during which the control device was offline for routine maintenance using Equation 1 of this section.

( Eq. 1) RM DT DT PU PU p c p c = + +

Where:

RM = Annual percentage of process unit uptime during which control device is down for routine control device maintenance PUp = Process unit uptime for the previous semiannual compliance period 46 PUc = Process unit uptime for the current semiannual compliance period DTp = Control device downtime claimed under the routine control device maintenance exemption for the previous semiannual compliance period DTc = Control device downtime claimed under the routine control device maintenance exemption for the current semiannual compliance period ( 6) The results of any performance tests conducted during the semiannual reporting period.

( 7) If there are no deviations from any applicable compliance option or operating requirement, and there are no deviations from the requirements for work practice requirements in Table 8 of this subpart, a statement that there were no deviations from the compliance options,

operating requirements, or work practice requirements during the reporting period.

( 8) If there were no periods during which the continuous monitoring system( s) ( CMS), including CEMS and CPMS, was out of control as specified in § 63.8( c)( 7), a statement that there were no periods during which the CMS was out of control during the reporting period.

( d) For each deviation from a compliance option or operating requirement and for each deviation from the work practice requirements in Table 8 of this subpart that occurs at an affected source where you are not using a CMS to comply with the compliance options, operating requirements,

or work practice requirements in this subpart, the 47 compliance report must contain the information in paragraphs ( c)( 1) through ( 6) of this section and the information in paragraphs ( d)( 1) and ( 2) of this section. This includes periods of startup, shutdown, and malfunction and routine control device maintenance.

( 1) The total operating time of each affected source during the reporting period.

( 2) Information on the number, duration, and cause of deviations ( including unknown cause, if applicable), as applicable, and the corrective action taken.

( e) For each deviation from a compliance option or operating requirement occurring at an affected source where you are using a CMS to comply with the compliance options and operating requirements in this subpart, you must include the information in paragraphs ( c)( 1) through ( 6) and the information in paragraphs ( e)( 1) through ( 11) of this section. This includes periods of startup, shutdown, and malfunction and routine control device maintenance.

( 1) The date and time that each malfunction started and stopped.

( 2) The date and time that each CMS was inoperative,

except for zero ( low level) and high level checks.

( 3) The date, time, and duration that each CMS was out of control, including the information in § 63.8( c)( 8).

( 4) The date and time that each deviation started and stopped, and whether each deviation occurred during a period 48 of startup, shutdown, or malfunction; during a period of control device maintenance covered in your approved routine control device maintenance exemption; or during another period.

( 5) A summary of the total duration of the deviation during the reporting period and the total duration as a percent of the total source operating time during that reporting period.

( 6) A breakdown of the total duration of the deviations during the reporting period into those that are due to startup, shutdown, control system problems, control device maintenance, process problems, other known causes,

and other unknown causes.

( 7) A summary of the total duration of CMS downtime during the reporting period and the total duration of CMS downtime as a percent of the total source operating time during that reporting period.

( 8) A brief description of the process units.

( 9) A brief description of the CMS.

( 10) The date of the latest CMS certification or audit.

( 11) A description of any changes in CMS, processes,

or controls since the last reporting period.

( f) If you comply with the emissions averaging compliance option in § 63.2240( c), you must include in your semiannual compliance report calculations based on operating 49 data from the semiannual reporting period that demonstrate that actual mass removal equals or exceeds the required mass removal.

( g) Each affected source that has obtained a title V operating permit pursuant to 40 CFR part 70 or 71 must report all deviations as defined in this subpart in the semiannual monitoring report required by § 70.6( a)( 3)( iii)( A)

or § 71.6( a)( 3)( iii)( A). If an affected source submits a compliance report pursuant to Table 9 of this subpart along with, or as part of, the semiannual monitoring report required by § 70.6( a)( 3)( iii)( A) or § 71.6( a)( 3)( iii)( A), and the compliance report includes all required information concerning deviations from any compliance option, operating requirement, or work practice requirement in this subpart,

submission of the compliance report shall be deemed to satisfy any obligation to report the same deviations in the semiannual monitoring report. However, submission of a compliance report shall not otherwise affect any obligation the affected source may have to report deviations from permit requirements to the permitting authority.

§ 63.2282 What records must I keep?

( a) You must keep the records listed in paragraphs ( a)( 1) through ( 4) of this section.

( 1) A copy of each notification and report that you submitted to comply with this subpart, including all documentation supporting any Initial Notification or 50 Notification of Compliance Status that you submitted,

according to the requirements in § 63.10( b)( 2)( xiv).

( 2) The records in § 63.6( e)( 3)( iii) through ( v)

related to startup, shutdown, and malfunction.

( 3) The records in § 63.2250( e) relating to control device maintenance and documentation of your approved routine control device maintenance exemption, if you request such an exemption under § 63.2251.

( 4) Records of performance tests and performance evaluations as required in § 63.10( b)( 2)( viii).

( b) You must keep the records required in Tables 7 and 8 of this subpart to show continuous compliance with each compliance option, operating requirement, and work practice requirement that applies to you.

( c) For each CEMS, you must keep the following records.

( 1) Records described in § 63.10( b)( 2)( vi) through ( xi).

( 2) Previous ( i. e., superseded) versions of the performance evaluation plan as required in § 63.8( d)( 3).

( 3) Request for alternatives to relative accuracy testing for CEMS as required in § 63.8( f)( 6)( i).

( 4) Records of the date and time that each deviation started and stopped, and whether the deviation occurred during a period of startup, shutdown, or malfunction or during another period. 51 ( d) If you comply with the emissions averaging compliance option in § 63.2240( c), you must keep records of all information required to calculate emission debits and credits.

( e) If you operate a catalytic oxidizer, you must keep records of annual catalyst activity checks and subsequent corrective actions.

§ 63.2283 In what form and how long must I keep my records?

( a) Your records must be in a form suitable and readily available for expeditious review as specified in § 63.10( b)( 1).

( b) As specified in § 63.10( b)( 1), you must keep each record for 5 years following the date of each occurrence,

measurement, maintenance, corrective action, report, or record.

( c) You must keep each record on site for at least 2 years after the date of each occurrence, measurement,

maintenance, corrective action, report, or record according to § 63.10( b)( 1). You can keep the records offsite for the remaining 3 years.

Other Requirements and Information § 63.2290 What parts of the General Provisions apply to me?

Table 10 of this subpart shows which parts of the General Provisions in § § 63.1 through 63.13 apply to you.

§ 63.2291 Who implements and enforces this subpart?

( a) This subpart can be implemented and enforced by 52 the U. S. EPA or a delegated authority such as your State,

local, or tribal agency. If the EPA Administrator has delegated authority to your State, local, or tribal agency,

then that agency has the authority to implement and enforce this subpart. You should contact your EPA Regional Office to find out if this subpart is delegated to your State,

local, or tribal agency.

( b) In delegating implementation and enforcement authority of this subpart to a State, local, or tribal agency under section 40 CFR part 63, subpart E, the authorities contained in paragraph ( c) of this section are retained by the EPA Administrator and are not transferred to the State, local, or tribal agency.

( c) The authorities that will not be delegated to State, local, or tribal agencies are listed in paragraphs ( c)( 1) through ( 4) of this section.

( 1) Approval of alternatives to the compliance options, operating requirements, and work practice requirements in § § 63.2240 and 63.2241 as specified in § 63.6( g). For the purposes of delegation authority under 40 CFR part 63, subpart E, " compliance options" represent " emission limits"; " operating requirements" represent " operating limits"; and " work practice requirements"

represent " work practice standards."

( 2) Approval of major alternatives to test methods as specified in § 63.7( e)( 2)( ii) and ( f) and as defined in 53 § 63.90.

( 3) Approval of major alternatives to monitoring as specified in § 63.8( f) and as defined in § 63.90.

( 4) Approval of major alternatives to recordkeeping and reporting as specified in § 63.10( f) and as defined in § 63.90.

§ 63.2292 What definitions apply to this subpart?

Terms used in this subpart are defined in the Clean Air Act, in 40 CFR 63.2, the General Provisions, and in this section as follows:

Affected source means the collection of dryers,

refiners, blenders, formers, presses, board coolers, and other process units associated with the manufacturing of plywood and composite wood products. The affected source includes, but is not limited to, green end operations,

refining, drying operations, resin preparation, blending and forming operations, pressing and board cooling operations,

and miscellaneous finishing operations ( such as sanding,

sawing, patching, edge sealing, and other finishing operations not subject to other NESHAP). The affected source also includes onsite storage of raw materials used in the manufacture of plywood and/ or composite wood products,

such as resins; onsite wastewater treatment operations specifically associated with plywood and composite wood products manufacturing; and miscellaneous coating operations ( defined elsewhere in this section). The affected source 54 includes lumber kilns at PCWP manufacturing facilities and at any other kind of facility.

Agricultural fiber means the fiber of an annual agricultural crop. Examples of agricultural fibers include ( but are not limited to) wheat straw, rice straw, and bagasse.

Biofilter means an enclosed control system such as a tank or series of tanks with a fixed roof that contact emissions with a solid media ( such as bark) and use microbiological activity to transform organic pollutants in a process exhaust stream to innocuous compounds such as carbon dioxide, water, and inorganic salts. Wastewater treatment systems such as aeration lagoons or activated sludge systems are not considered to be biofilters.

Capture device means a hood, enclosure, or other means of collecting emissions into a duct so that the emissions can be measured.

Capture efficiency means the fraction ( expressed as a percentage) of the pollutants from an emission source that are collected by a capture device.

Catalytic oxidizer means a control system that combusts or oxidizes, in the presence of a catalyst, exhaust gas from a process unit. Catalytic oxidizers include regenerative catalytic oxidizers and thermal catalytic oxidizers.

Combustion unit means a dryer burner, process heater,

or boiler used for combustion of organic hazardous air 55 pollutant emissions.

Control device means any equipment that reduces the quantity of a hazardous air pollutant that is emitted to the air. The device may destroy the hazardous air pollutant or secure the hazardous air pollutant for subsequent recovery.

Control devices include, but are not limited to, thermal or catalytic oxidizers, combustion units that incinerate process exhausts, biofilters, and condensers.

Control system or add on control system means the combination of capture and control devices used to reduce hazardous air pollutant emissions to the atmosphere.

Conveyor strand dryer means a conveyor dryer used to reduce the moisture of wood strands used in the manufacture of oriented strandboard, laminated strand lumber, or other wood strand based products. A conveyor strand dryer is a process unit.

Conveyor strand dryer zone means each portion of a conveyor strand dryer with a separate heat exchange system and exhaust vent( s). Conveyor strand dryers contain multiple zones ( for example, three zones), which may be divided into multiple sections.

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, 56 any compliance option, operating requirement, or work practice requirement;

( 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 compliance option, operating requirement, or work practice requirement in this subpart during startup, shutdown, or malfunction, regardless of whether or not such failure is permitted by this subpart.

Dryer heated zones means the zones of a softwood veneer dryer or fiberboard mat dryer that are equipped with heating and hot air circulation units. The cooling zone( s) of the dryer through which ambient air is blown are not part of the dryer heated zones.

Dry rotary dryer means a rotary dryer that dries wood particles or fibers with a maximum inlet moisture content of less than or equal to 30 percent ( by weight, dry basis) and operates with a maximum inlet temperature of less than or equal to 600oF. A dry rotary dryer is a process unit.

Dry forming means the process of making a mat of resinated fiber to be compressed into a reconstituted wood product such as particleboard, oriented strandboard ( OSB),

medium density fiberboard ( MDF), or hardboard.

Fiber means the discrete elements of wood or similar cellulosic material, which are separated by mechanical 57 means, as in refining, that can be formed into boards.

Fiberboard means a composite panel composed of cellulosic fibers ( usually wood or agricultural material)

made by wet forming and compacting a mat of fibers.

Fiberboard density generally is less than 0.50 grams per cubic centimeter ( 31.5 pounds per cubic foot).

Fiberboard mat dryer means a dryer used to reduce the moisture of wet formed wood fiber mats by operation at elevated temperature. A fiberboard mat dryer is a process unit.

Flame zone means the portion of the combustion chamber in a combustion unit that is occupied by the flame envelope.

Furnish means the fibers, particles, or strands used for making boards.

Glue laminated beam means a structural wood beam made by bonding lumber together along its faces with resin.

Green rotary dryer means a rotary dryer that dries wood particles or fibers with an inlet moisture content of greater than 30 percent ( by weight, dry basis) at any dryer inlet temperature or operates with an inlet temperature of greater than 600oF with any inlet moisture content. A green rotary dryer is a process unit.

Group 1 miscellaneous coating operations means application of edge seals, nail lines, logo ( or other information) paint, shelving edge fillers,

trademark/ gradestamp inks, and wood putty patches to plywood 58 and composite wood products ( except kiln dried lumber) on the same site where the plywood and composite wood products are manufactured. Group 1 miscellaneous coating operations also include application of synthetic patches to plywood at new affected sources.

Hardboard means a composite panel composed of interfelted cellulosic fibers made by dry or wet forming and pressing of a resinated fiber mat. Hardboard generally has a density of 0.50 grams per cubic centimeter ( 31.5 pounds per cubic foot) or greater.

Hardboard oven means an oven used to heat treat or temper hardboard after hot pressing. Humidification chambers are not considered as part of hardboard ovens. A hardboard oven is a process unit.

Hardwood means the wood of a broad leafed tree, either deciduous or evergreen. Examples of hardwoods include ( but are not limited to) aspen, birch, poplar, and oak.

Hardwood veneer dryer means a dryer that removes excess moisture from veneer by conveying the veneer through a heated medium on rollers, belts, cables, or wire mesh.

Hardwood veneer dryers are used to dry veneer with less than 30 percent softwood species on an annual volume basis.

Veneer kilns that operate as batch units, veneer dryers heated by radio frequency or microwaves that are used to redry veneer, and veneer redryers ( defined elsewhere in this section) that are heated by conventional means are not 59 considered to be hardwood veneer dryers. A hardwood veneer dryer is a process unit.

Kiln dried lumber means solid wood lumber that has been dried in a lumber kiln.

Laminated strand lumber ( LSL) means a composite product formed into a billet made of thin wood strands cut from whole logs, resinated, and pressed together with the grain of each strand oriented parallel to the length of the finished product.

Laminated veneer lumber ( LVL) means a composite product formed into a billet made from layers of resinated wood veneer sheets or pieces pressed together with the grain of each veneer aligned primarily along the length of the finished product. Laminated veneer lumber includes parallel strand lumber ( PSL).

Lumber kiln means an enclosed dryer operated at elevated temperature to reduce the moisture content of lumber.

Medium density fiberboard ( MDF) means a composite panel composed of cellulosic fibers ( usually wood or agricultural fiber) made by dry forming and pressing of a resinated fiber mat.

Method detection limit means the minimum concentration of an analyte that can be determined with 99 percent confidence that the true value is greater than zero.

Miscellaneous coating operations means application of 60 any of the following to plywood or composite wood products:

edge seals, moisture sealants, anti skid coatings, company logos, trademark or grade stamps, nail lines, synthetic patches, wood patches, wood putty, concrete forming oils,

glues for veneer composing, and shelving edge fillers.

Miscellaneous coating operations also include the application of primer to OSB siding that occurs at the same site as OSB manufacture and application of asphalt, clay slurry, or titanium dioxide coatings to fiberboard at the same site of fiberboard manufacture.

MSF means thousand square feet ( 92.9 square meters).

Square footage of panels is usually measured on a thickness basis, such as 3/ 8 inch, to define the total volume of panels. Equation 6 of § 63.2262( j) shows how to convert from one thickness basis to another.

Nondetect data means, for the purposes of this subpart,

any value that is below the method detection limit.

Non HAP coating means a coating with HAP contents below 0.1 percent by mass for OSHA defined carcinogens as specified in 29 CFR 1910.1200( d)( 4), and below 1.0 percent by mass for other HAP compounds.

One hour period means a 60 minute period.

Oriented strandboard ( OSB) means a composite panel produced from thin wood strands cut from whole logs, formed into resinated layers ( with the grain of strands in one layer oriented perpendicular to the strands in adjacent 61 layers), and pressed.

Oven dried ton( s) ( ODT) means tons of wood dried until all of the moisture in the wood is removed. One oven dried ton equals 907 oven dried kilograms.

Partial wood products enclosure means an enclosure that does not meet the design criteria for a wood products enclosure, as defined in this subpart.

Particle means a discrete, small piece of cellulosic material ( usually wood or agricultural fiber) produced mechanically and used as the aggregate for a particleboard.

Particleboard means a composite panel composed primarily of cellulosic materials ( usually wood or agricultural fiber) generally in the form of discrete pieces or particles, as distinguished from fibers, which are pressed together with resin.

Plywood and composite wood products ( PCWP)

manufacturing facility means a facility that manufactures plywood and/ or composite wood products by bonding wood material ( fibers, particles, strands, veneers, etc.) or agricultural fiber, generally with resin under heat and pressure, to form a structural panel or engineered wood product. Plywood and composite wood products manufacturing facilities also include facilities that manufacture dry veneer and lumber kilns located at any facility. Plywood and composite wood products include ( but are not limited to)

plywood, veneer, particleboard, oriented strandboard, 62 hardboard, fiberboard, medium density fiberboard, laminated strand lumber, laminated veneer lumber, wood I joists,

kilndried lumber, and glue laminated beams.

Plywood means a panel product consisting of layers of wood veneers hot pressed together with resin. Plywood includes panel products made by hot pressing ( with resin)

veneers to a substrate such as particleboard, MDF, or lumber.

Press predryer means a dryer used to reduce the moisture and elevate the temperature of a wet formed fiber mat before the mat enters a hot press. A press predryer is a process unit.

Pressurized refiner means a piece of equipment operated under pressure for preheating ( usually by steaming) wood material and refining ( rubbing or grinding) the wood material into fibers. Pressurized refiners are operated with continuous infeed and outfeed of wood material and maintain elevated internal pressures ( i. e., there is no pressure release) throughout the preheating and refining process. A pressurized refiner is a process unit.

Primary tube dryer means a single stage tube dryer or the first stage of a multi stage tube dryer. Tube dryer stages are separated by vents for removal of moist gases between stages ( for example, a product cyclone at the end of a single stage dryer or between the first and second stages of a multi stage tube dryer). The first stage of a multi 63 stage tube dryer is used to remove the majority of the moisture from the wood furnish ( compared to the moisture reduction in subsequent stages of the tube dryer).

Blowlines used to apply resin are considered part of the primary tube dryer. A primary tube dryer is a process unit.

Process unit means equipment classified according to its function such as a blender, dryer, press, former, or board cooler.

Reconstituted wood product board cooler means a piece of equipment designed to reduce the temperature of a board by means of forced air or convection within a controlled time period after the board exits the reconstituted wood product press unloader. Board coolers include wicket and star type coolers commonly found at MDF and particleboard plants. Board coolers do not include cooling sections of dryers ( e. g., veneer dryers or fiberboard mat dryers) or coolers integrated into or following hardboard bake ovens or humidifiers. A reconstituted wood product board cooler is a process unit.

Reconstituted wood product press means a press,

including ( if applicable) the press unloader, that presses a resinated mat of wood fibers, particles, or strands between hot platens or hot rollers to compact and set the mat into a panel by simultaneous application of heat and pressure.

Reconstituted wood product presses are used in the manufacture of hardboard, medium density fiberboard, 64 particleboard, and oriented strandboard. Extruders are not considered to be reconstituted wood product presses. A reconstituted wood product press is a process unit.

Representative operating conditions means operation of a process unit during performance testing under the conditions that the process unit will typically be operating in the future, including use of a representative range of materials ( e. g., wood material of a typical species mix and moisture content or typical resin formulation) and representative operating temperature range.

Resin means the synthetic adhesive ( including glue) or natural binder, including additives, used to bond wood or other cellulosic materials together to produce plywood and composite wood products.

Responsible official means responsible official as defined in 40 CFR 70.2 and 71.2.

Rotary strand dryer means a rotary dryer operated at elevated temperature and used to reduce the moisture of wood strands used in the manufacture of OSB, LSL, or other wood strand based products. A rotary strand dryer is a process unit.

Secondary tube dryer means the second stage and subsequent stages following the primary stage of a multistage tube dryer. Secondary tube dryers, also referred to as relay dryers, operate at lower temperatures than the primary tube dryer they follow. Secondary tube dryers are 65 used to remove only a small amount of the furnish moisture compared to the furnish moisture reduction across the primary tube dryer. A secondary tube dryer is a process unit.

Softwood means the wood of a coniferous tree. Examples of softwoods include ( but are not limited to) Southern yellow pine, Douglas fir, and White spruce.

Softwood veneer dryer means a dryer that removes excess moisture from veneer by conveying the veneer through a heated medium, generally on rollers, belts, cables, or wire mesh. Softwood veneer dryers are used to dry veneer with greater than or equal to 30 percent softwood species on an annual volume basis. Veneer kilns that operate as batch units, veneer dryers heated by radio frequency or microwaves that are used to redry veneer, and veneer redryers ( defined elsewhere in this section) that are heated by conventional means are not considered to be softwood veneer dryers. A softwood veneer dryer is a process unit.

Startup means bringing equipment online and starting the production process.

Startup, initial means the first time equipment is put into operation. Initial startup does not include operation solely for testing equipment. Initial startup does not include subsequent startups ( as defined in this section)

following malfunction or shutdowns or following changes in product or between batch operations. Initial startup does 66 not include startup of equipment that occurred when the source was an area source.

Startup, shutdown, and malfunction plan ( SSMP) means a plan developed according to the provisions of § 63.6( e)( 3).

Strand means a long ( with respect to thickness and width), flat wood piece specially cut from a log for use in oriented strandboard, laminated strand lumber, or other wood strand based product.

Temporary total enclosure ( TTE) means an enclosure constructed for the purpose of measuring the capture efficiency of pollutants emitted from a given source, as defined in Method 204 of 40 CFR part 51, appendix M.

Thermal oxidizer means a control system that combusts or oxidizes exhaust gas from a process unit. Thermal oxidizers include regenerative thermal oxidizers and combustion units.

Total hazardous air pollutant ( HAP) emissions means,

for purposes of this rulemaking, the sum of the emissions of the following six compounds: acetaldehyde, acrolein,

formaldehyde, methanol, phenol, and propionaldehyde.

Tube dryer means a single stage or multistage dryer operated at elevated temperature and used to reduce the moisture of wood fibers or particles as they are conveyed ( usually pneumatically) through the dryer. Resin may or may not be applied to the wood material before it enters the tube dryer. A tube dryer is a process unit. 67 Veneer means thin sheets of wood peeled or sliced from logs for use in the manufacture of wood products such as plywood, laminated veneer lumber, or other products.

Veneer redryer means a dryer heated by conventional means, such as direct wood fired, direct gas fired, or steam heated, that is used to redry veneer that has been previously dried. Because the veneer dried in a veneer redryer has been previously dried, the inlet moisture content of the veneer entering the redryer is less than 25 percent ( by weight, dry basis). Batch units used to redry veneer ( such as redry cookers) are not considered to be veneer redryers. A veneer redryer is a process unit.

Wet control device means any equipment that uses water as a means of collecting an air pollutant. Wet control devices include scrubbers, wet electrostatic precipitators,

and electrified filter beds. Wet control devices do not include biofilters or other equipment that destroys or degrades hazardous air pollutants.

Wet forming means the process of making a slurry of water, fiber, and additives into a mat of fibers to be compressed into a fiberboard or hardboard product.

Wood I joists means a structural wood beam with an Ishaped cross section formed by bonding ( with resin) wood or laminated veneer lumber flanges onto a web cut from a panel such as plywood or oriented strandboard.

Wood products enclosure means a permanently installed 68 containment that was designed to meet the following physical design criteria:

1. Any natural draft opening ( NDO) shall be at least four equivalent opening diameters from each HAP emitting point, except for where board enters and exits the enclosure, unless otherwise specified by the Administrator.

2. The total area of all NDOs shall not exceed 5 percent of the surface area of the enclosure's four walls, floor, and ceiling.

3. The average facial velocity ( FV) of air through all NDOs shall be at least 3,600 meters per hour ( 200 feet per minute). The direction of airflow through all NDOs shall be into the enclosure.

4. All access doors and windows whose areas are not included in 2 and are not included in the calculation of FV in 3 shall be closed during routine operation of the process.

5. The enclosure is designed and maintained to capture all emissions for discharge through a control device.

Work practice requirement means any design, equipment,

work practice, or operational standard, or combination thereof, that is promulgated pursuant to section 112( h) of the Clean Air Act. 69 70 Table 1A to Subpart DDDD of Part 63. Production Based Compliance Options For the following process units... You must meet the following production based compliance option ( total HAPa basis)...

( 1) fiberboard mat dryer heated zones ( at new affected sources only) 0.022 lb/ MSF 1/ 2"

( 2) green rotary dryers 0.058 lb/ ODT ( 3) hardboard ovens 0.022 lb/ MSF 1/ 8"

( 4) press predryers ( at new affected sources only) 0.037 lb/ MSF 1/ 2"

( 5) pressurized refiners 0.039 lb/ ODT ( 6) primary tube dryers 0.26 lb/ ODT ( 7) reconstituted wood product board coolers ( at new affected sources only) 0.014 lb/ MSF 3/ 4"

( 8) reconstituted wood product presses 0.30 lb/ MSF 3/ 4"

( 9) softwood veneer dryer heated zones 0.022 lb/ MSF 3/ 8"

( 10) rotary strand dryers 0.18 lb/ ODT ( 11) secondary tube dryers 0.010 lb/ ODT aTotal HAP, as defined in § 63.2292, includes acetaldehyde, acrolein, formaldehyde, methanol, phenol, and propionaldehyde. lb/ ODT = pounds per oven dried ton; lb/ MSF = pounds per thousand square feet with a specified thickness basis ( inches). Section 63.2262( j) shows how to convert from one thickness basis to another. Note: There is no production based compliance option for conveyor strand dryers. 71 Table 1B to Subpart DDDD of Part 63. Add on Control Systems Compliance Options For each of the following process units... You must comply with one of the following six compliance options by using an emissions control system...

Fiberboard mat dryer heated zones ( at new affected sources only); green rotary dryers; hardboard ovens; press predryers ( at new affected sources only); pressurized refiners; tube dryers; reconstituted wood product board coolers ( at new affected sources only); reconstituted wood product presses; softwood veneer dryer heated zones; rotary strand dryers; conveyor strand dryer zone one ( at existing affected sources); and conveyor strand dryer zones one and two ( at new affected sources) ( 1) reduce emissions of total HAP, measured as THC ( as carbon) a, by 90 percent; or ( 2) limit emissions of total HAP, measured as THC ( as carbon) a, to 20 parts per million by volume, dry ( ppmvd); or ( 3) reduce methanol emissions by 90 percent; or ( 4) limit methanol emissions to less than or equal to 1 ppmvd if uncontrolled methanol emissions entering the control device are greater than or equal to 10 ppmvd; or ( 5) reduce formaldehyde emissions by 90 percent; or ( 6) limit formaldehyde emissions to less than or equal to 1 ppmvd if uncontrolled formaldehyde emissions entering the control device are greater than or equal to 10 ppmvd.

aYou may choose to subtract methane from THC as carbon measurements. 72 Table 2 to Subpart DDDD of Part 63. Operating Requirements If you operate a( n) ... you must... or you must...

( 1) thermal oxidizer maintain the 3 hour block average firebox temperature above the minimum temperature established during the performance test maintain the 3 hour block average THC concentrationa in the thermal oxidizer exhaust below the maximum concentration established during the performance test.

( 2) catalytic oxidizer maintain the 3 hour block average catalytic oxidizer temperature above the minimum temperature established during the performance test; AND check the activity level of a representative sample of the catalyst at least every 12 months maintain the 3 hour block average THC concentrationa in the catalytic oxidizer exhaust below the maximum concentration established during the performance test.

( 3) biofilter maintain the 24 hour block biofilter bed temperature within the range established according to § 63.2262( m) maintain the 24 hour block average THC concentrationa in the biofilter exhaust below the maximum concentration established during the performance test.

( 4) control device other than a thermal oxidizer, catalytic oxidizer, or biofilter petition the Administrator for site specific operating parameter( s) to be established during the performance test and maintain the average operating parameter( s) within the range( s) established during the performance test maintain the 3 hour block average THC concentrationa in the control device exhaust below the maximum concentration established during the performance test.

( 5) process unit that meets a compliance option in table 1a of this subpart, or a process unit that generates debits in an emissions average without the use of a control device maintain on a daily basis the process unit controlling operating parameter( s) within the ranges established during the performance test according to § 63.2262( n) maintain the 3 hour block average THC concentrationa in the process unit exhaust below the maximum concentration established during the performance test.

aYou may choose to subtract methane from THC measurements. 73 Table 3 to Subpart DDDD of Part 63. Work Practice Requirements For the following process units at existing or new affected sources... You must...

( 1) dry rotary dryers process furnish with a 24 hour block average inlet moisture content of less than or equal to 30 percent ( by weight, dry basis); AND operate with a 24 hour block average inlet dryer temperature of less than or equal to 600oF.

( 2) hardwood veneer dryers process less than 30 volume percent softwood species on an annual basis.

( 3) softwood veneer dryers minimize fugitive emissions from the dryer doors through ( proper maintenance procedures) and the green end of the dryers ( though proper balancing of the heated zone exhausts).

( 4) veneer redryers process veneer that has been previously dried, such that the 24 hour block average inlet moisture content of the veneer is less than or equal to 25 percent ( by weight, dry basis).

( 5) group 1 miscellaneous coating operations use non HAP coatings as defined in § 63.2292 74 Table 4 to Subpart DDDD of Part 63. Requirements for Performance Tests For... You must... Using...

( 1) each process unit subject to a compliance option in Table 1A or 1B of this subpart or used in calculation of an emissions average under § 63.2240( c) select sampling port's location and the number of traverse ports Method 1 or 1A of 40 CFR part 60, appendix A ( as appropriate).

( 2) each process unit subject to a compliance option in Table 1A or 1B of this subpart or used in calculation of an emissions average under § 63.2240( c) determine velocity and volumetric flow rate Method 2 in addition to Method 2A, 2C, 2D, 2F, or 2G in appendix A to 40 CFR part 60 ( as appropriate).

( 3) each process unit subject to a compliance option in Table 1A or 1B of this subpart or used in calculation of an emissions average under § 63.2240( c) conduct gas molecular weight analysis Method 3, 3A, or 3B in appendix A to 40 CFR part 60 ( as appropriate).

( 4) each process unit subject to a compliance option in Table 1A or 1B of this subpart or used in calculation of an emissions average under § 63.2240( c) measure moisture content of the stack gas Method 4 in appendix A to 40 CFR part 60; OR Method 320 in appendix A to 40 CFR part 63; OR ASTM D6348 03 ( incorporated by reference, see § 63.14( f))

( 5) each process unit subject to a compliance option in Table 1B of this subpart for which you choose to demonstrate compliance using a total HAP as THC compliance option measure emissions of total HAP as THC Method 25A in appendix A to 40 CFR part 60. You may measure emissions of methane using EPA Method 18 in appendix A to 40 CFR part 60 and subtract the methane emissions from the emissions of total HAP as THC.

( 6) each process unit subject to a compliance option in Table 1A; OR for each process unit used in calculation of an emissions average under § 63.2240( c) measure emissions of total HAP ( as defined in § 63.2292) Method 320 in appendix A to 40 CFR part 63; OR the NCASI Method IM/ CAN/ WP 99.02 ( incorporated by reference, see § 63.14( f)); OR ASTM D6348 03 provided that % R as determined in Annex A5 of ASTM D6348 03 is equal or greater than 70% and less than or equal to 130%. 75 ( 7) each process unit subject to a compliance option in Table 1B of this subpart for which you choose to demonstrate compliance using a methanol compliance option measure emissions of methanol Method 308 in appendix A to 40 CFR part 63; OR Method 320 in appendix A to 40 CFR part 63; OR the NCASI Method CI/ WP 98.01 ( incorporated by reference, see § 63.14( f)); OR the NCASI Method IM/ CAN/ WP 99.02 ( incorporated by reference, see § 63.14( f)).

( 8) each process unit subject to a compliance option in Table 1B of this subpart for which you choose to demonstrate compliance using a formaldehyde compliance option measure emissions of formaldehyde Method 316 in appendix A to 40 CFR part 63; OR Method 320 in appendix A to 40 CFR part 63; OR Method 0011 in " Test Methods for Evaluating Solid Waste, Physical/ Chemical Methods" ( EPA Publication No. SW 846) for formaldehyde; OR the NCASI Method CI/ WP 98.01 ( incorporated by reference, see § 63.14( f)); OR the NCASI Method IM/ CAN/ WP 99.02 ( incorporated by reference, see § 63.14( f)). 76 ( 9) each reconstituted wood product press at a new or existing affected source or reconstituted wood product board cooler at a new affected source subject to a compliance option in Table 1B or used in calculation of an emissions average under § 63.2240( c) meet the design specifications included in the definition of wood products enclosure in § 63.2292 OR determine the percent capture efficiency of the enclosure directing emissions to an add on control device Methods 204 and 204A through 204F of 40 CFR part 51, appendix M to determine capture efficiency ( except for wood products enclosures as defined in § 63.2292). Enclosures that meet the definition of wood products enclosure or that meet Method 204 requirements for a PTE are assumed to have a capture efficiency of 100 percent. Enclosures that do not meet either the PTE requirements or design criteria for a wood products enclosure must determine the capture efficiency by constructing a TTE according to the requirements of Method 204 and applying Methods 204A through 204F ( as appropriate). As an alternative to Methods 204 and 204A through 204F, you may use the tracer gas method contained in appendix A to this subpart.

( 10) each reconstituted wood product press at a new or existing affected source or reconstituted wood product board cooler at a new affected source subject to a compliance option in Table 1A of this subpart determine the percent capture efficiency a TTE and Methods 204 and 204A through 204F ( as appropriate) of 40 CFR part 51, appendix M. As an alternative to installing a TTE and using Methods 204 and 204A through 204F, you may use the tracer gas method contained in appendix A to this subpart.

( 11) each process unit subject to a compliance option in Tables 1A and 1B of this subpart or used in calculation of an emissions average under § 63.2240( c) establish the sitespecific operating requirements ( including the parameter limits or THC concentration limits) in Table 2 of this subpart data from the parameter monitoring system or THC CEMS and the applicable performance test method( s). 77 Table 5 to Subpart DDDD of Part 63. Performance Testing and Initial Compliance Demonstrations for the Compliance Options and Operating Requirements For each... For the following compliance options and operating requirements ... You have demonstrated initial compliance if...

( 1) process unit listed in Table 1A of this subpart meet the production based compliance options listed in Table 1A of this subpart the average total HAP emissions measured using the methods in Table 4 of this subpart over the 3 hour performance test are no greater than the compliance option in Table 1A of this subpart; AND you have a record of the operating requirement( s) listed in Table 2 of this subpart for the process unit over the performance test during which emissions did not exceed the compliance option value.

( 2) process unit listed in Table 1B of this subpart reduce emissions of total HAP, measured as THC, by 90 percent total HAP emissions, measured using the methods in Table 4 of this subpart over the 3 hour performance test, are reduced by at least 90 percent, as calculated using the procedures in § 63.2262; AND you have a record of the operating requirement( s) listed in Table 2 of this subpart for the process unit over the performance test during which emissions were reduced by at least 90 percent.

( 3) process unit listed in Table 1B of this subpart limit emissions of total HAP, measured as THC, to 20 ppmvd the average total HAP emissions, measured using the methods in Table 4 of this subpart over the 3 hour performance test, do not exceed 20 ppmvd; AND you have a record of the operating requirement( s) listed in Table 2 of this subpart for the process unit over the performance test during which emissions did not exceed 20 ppmvd. 78 ( 4) process unit listed in Table 1B of this subpart reduce methanol or formaldehyde emissions by 90 percent the methanol or formaldehyde emissions measured using the methods in Table 4 of this subpart over the 3 hour performance test, are reduced by at least 90 percent, as calculated using the procedures in § 63.2262; AND you have a record of the operating requirement( s) listed in Table 2 of this subpart for the process unit over the performance test during which emissions were reduced by at least 90 percent.

( 5) process unit listed in Table 1B of this subpart limit methanol or formaldehyde emissions to less than or equal to 1 ppmvd ( if uncontrolled emissions are greater than or equal to 10 ppmvd) the average methanol or formaldehyde emissions, measured using the methods in Table 4 of this subpart over the 3 hour performance test, do not exceed 1 ppmvd; AND you have a record of the operating requirement( s) listed in Table 2 of this subpart for the process unit over the performance test during which emissions did not exceed 1 ppmvd. If the process unit is a reconstituted wood product press or a reconstituted wood product board cooler, your capture device either meets the EPA Method 204 criteria for a PTE or achieves a capture efficiency of greater than or equal to 95 percent.

( 6) reconstituted wood product press at a new or existing affected source, or reconstituted wood product board cooler at a new affected source compliance options in Tables 1A and 1B of this subpart or the emissions averaging compliance option in § 63.2240( c) you submit the results of capture efficiency verification using the methods in Table 4 of this subpart with your Notification of Compliance Status.

( 7) process unit listed in Table 1B of this subpart controlled by routing exhaust to a combustion unit compliance options in Table 1B of this subpart or the emissions averaging compliance option in § 63.2240( c) you submit with your Notification of Compliance Status documentation showing that the process exhausts controlled enter into the flame zone of your combustion unit.

( 8) process unit listed in Table 1B of this subpart using a wet control device as the sole means of reducing HAP emissions compliance options in Table 1B of this subpart or the emissions averaging compliance option in § 63.2240( c) you submit with your Notification of Compliance Status your plan to address how organic HAP captured in the wastewater from the wet control device is contained or destroyed to minimize re release to the atmosphere. 79 Table 6 to Subpart DDDD of Part 63. Initial Compliance Demonstrations for Work Practice Requirements For each... For the following work practice requirements... You have demonstrated initial compliance if...

( 1) dry rotary dryer process furnish with an inlet moisture content less than or equal to 30 percent ( by weight, dry basis) AND operate with an inlet dryer temperature of less than or equal to 600oF you meet the work practice requirement AND you submit a signed statement with the Notification of Compliance Status that the dryer meets the criteria of a " dry rotary dryer" AND you have a record of the inlet moisture content and inlet dryer temperature ( as required in § 63.2263).

( 2) hardwood veneer dryer process less than 30 volume percent softwood species you meet the work practice requirement AND you submit a signed statement with the Notification of Compliance Status that the dryer meets the criteria of a " hardwood veneer dryer" AND you have a record of the percentage of softwoods processed in the dryer ( as required in § 63.2264).

( 3) softwood veneer dryer minimize fugitive emissions from the dryer doors and the green end you meet the work practice requirement AND you submit with the Notification of Compliance Status a copy of your plan for minimizing fugitive emissions from the veneer dryer heated zones ( as required in § 63.2265).

( 4) veneer redryers process veneer with an inlet moisture content of less than or equal to 25 percent ( by weight, dry basis) you meet the work practice requirement AND you submit a signed statement with the Notification of Compliance Status that the dryer operates only as a redryer AND you have a record of the veneer inlet moisture content of the veneer processed in the redryer ( as required in § 63.2266).

( 5) group 1 miscellaneous coating operations use non HAP coatings as defined in § 63.2292 you meet the work practice requirement AND you submit a signed statement with the Notification of Compliance Status that you are using non HAP coatings AND you have a record showing that you are using non HAP coatings. 80 Table 7 to Subpart DDDD of Part 63. Continuous Compliance With the Compliance Options and Operating Requirements For... For the following compliance options and operating requirements... You must demonstrate continuous compliance by...

( 1) each process unit listed in Table 1B of this subpart or used in calculation of an emissions average under § 63.2240( c) compliance options in Table 1B of this subpart or the emissions averaging compliance option in § 63.2240( c) and the operating requirements in Table 2 of this subpart based on monitoring of operating parameters collecting and recording the operating parameter monitoring system data listed in Table 2 of this subpart for the process unit according to § 63.2269( a)( b) and § 63.2270; AND reducing the operating parameter monitoring system data to the specified averages in units of the applicable requirement according to calculations in § 63.2270; AND maintaining the average operating parameter at or above the minimum, at or below the maximum, or within the range ( whichever applies) established according to § 63.2262.

( 2) each process unit listed in Tables 1A and 1B of this subpart or used in calculation of an emissions average under § 63.2240( c) compliance options in Tables 1A and 1B of this subpart or the emissions averaging compliance option in § 63.2240( c) and the operating requirements in Table 2 of this subpart based on THC CEMS data collecting and recording the THC monitoring data listed in Table 2 of this subpart for the process unit according to § 63.2269( d); AND reducing the CEMS data to 3 hour block averages according to calculations in § 63.2269( d); AND maintaining the 3 hour block average THC concentration in the exhaust gases less than or equal to the THC concentration established according to § 63.2262.

( 3) each process unit using a biofilter compliance options in Table 1B of this subpart or the emissions averaging compliance option in § 63.2240( c) conducting a repeat performance test using the applicable method( s) specified in Table 4 of this subpart within 2 years following the previous performance test and within 180 days after each replacement of any portion of the biofilter bed media with a different type of media or each replacement of more than 50 percent ( by volume) of the biofilter bed media with the same type of media. 81 Table 7 to Subpart DDDD of Part 63. Continuous Compliance With the Compliance Options and Operating Requirements For... For the following compliance options and operating requirements... You must demonstrate continuous compliance by...

( 4) each process unit using a catalytic oxidizer compliance options in Table 1B of this subpart or the emissions averaging compliance option in § 63.2240( c) checking the activity level of a representative sample of the catalyst at least every 12 months and taking any necessary corrective action to ensure that the catalyst is performing within its design range.

( 5) each process unit listed in Table 1A of this subpart, or each process unit without a control device used in calculation of an emissions averaging debit under § 63.2240( c) compliance options in Table 1A of this subpart or the emissions averaging compliance option in § 63.2240( c) and the operating requirements in Table 2 of this subpart based on monitoring of process unit controlling operating parameters collecting and recording on a daily basis process unit controlling operating parameter data; AND maintaining the operating parameter at or above the minimum, at or below the maximum, or within the range ( whichever applies) established according to § 63.2262.

( 6) process unit listed in Table 1B of this subpart using a wet control device as the sole means of reducing HAP emissions compliance options in Table 1B of this subpart or the emissions averaging compliance option in § 63.2240( c) implementing your plan to address how organic HAP captured in the wastewater from the wet control device is contained or destroyed to minimize re release to the atmosphere. 82 Table 8 to Subpart DDDD of Part 63. Continuous Compliance With the Work Practice Requirements For... For the following work practice requirements... You must demonstrate continuous compliance by...

( 1) dry rotary dryer process furnish with an inlet moisture content less than or equal to 30 percent ( by weight, dry basis) AND operate with an inlet dryer temperature of less than or equal to 600oF maintaining the 24 hour block average inlet furnish moisture content at less than or equal to 30 percent ( by weight, dry basis) AND maintaining the 24 hour block average inlet dryer temperature at less than or equal to 600oF; AND keeping records of the inlet furnish moisture content and inlet dryer temperature.

( 2) hardwood veneer dryer process less than 30 volume percent softwood species maintaining the volume percent softwood species processed below 30 percent AND keeping records of the volume percent softwood species processed.

( 3) softwood veneer dryer minimize fugitive emissions from the dryer doors and the green end following ( and documenting that you are following) your plan for minimizing fugitive emissions.

( 4) veneer redryers process veneer with an inlet moisture content of less than or equal to 25 percent ( by weight, dry basis) maintaining the 24 hour block average inlet moisture content of the veneer processed at or below 25 percent AND keeping records of the inlet moisture content of the veneer processed.

( 5) group 1 miscellaneous coating operations use non HAP coatings as defined in § 63.2292 continuing to use non HAP coatings AND keeping records showing that you are using non HAP coatings. 83 Table 9 to Subpart DDDD of Part 63. Requirements for Reports You must submit a( n)... The report must contain... You must submit the report...

( 1) compliance report the information in § 63.2281( c) through ( g). semiannually according to the requirements in § 63.2281( b).

( 2) immediate startup, shutdown, and malfunction report if you had a startup, shutdown, or malfunction during the reporting period that is not consistent with your SSMP ( i) actions taken for the event. by fax or telephone within 2 working days after starting actions inconsistent with the plan.

( ii) the information in § 63.10( d)( 5)( ii). by letter within 7 working days after the end of the event unless you have made alternative arrangements with the permitting authority. 84 Table 10 to Subpart DDDD of Part 63. Applicability of General Provisions to Subpart DDDD Citation Subject Brief Description Applies to Subpart DDDD § 63.1 Applicability Initial applicability determination; applicability after standard established; permit requirements; extensions, notifications Yes § 63.2 Definitions Definitions for part 63 standards Yes § 63.3 Units and Abbreviations Units and abbreviations for part 63 standards Yes § 63.4 Prohibited Activities Prohibited activities; compliance date; circumvention, fragmentation Yes § 63.5 Construction/ Reconstruction Applicability; applications; approvals Yes § 63.6( a) Applicability GP apply unless compliance extension; GP apply to area sources that become major Yes § 63.6( b)( 1)( 4) Compliance Dates for New and Reconstructed Sources Standards apply at effective date; 3 years after effective date; upon startup; 10 years after construction or reconstruction commences for section 112( f) Yes § 63.6( b)( 5) Notification Must notify if commenced construction or reconstruction after proposal Yes § 63.6( b)( 6) [ Reserved]

§ 63.6( b)( 7) Compliance Dates for New and Reconstructed Area Sources that Become Major Area sources that become major must comply with major source standards immediately upon becoming major, regardless of whether required to comply when they were an area source Yes § 63.6( c)( 1)( 2) Compliance Dates for Existing Sources Comply according to date in subpart, which must be no later than 3 years after effective date; for section 112( f) standards, comply within 90 days of effective date unless compliance extension Yes § 63.6( c)( 3)( 4) [ Reserved] 85 § 63.6( c)( 5) Compliance Dates for Existing Area Sources that Become Major Area sources that become major must comply with major source standards by date indicated in subpart or by equivalent time period ( e. g., 3 years) Yes § 63.6( d) [ Reserved]

§ 63.6( e)( 1)( 2) Operation & Maintenance Operate to minimize emissions at all times; correct malfunctions as soon as practicable; operation and maintenance requirements independently enforceable; information Administrator will use to determine if operation and maintenance requirements were met Yes § 63.6( e)( 3) Startup, Shutdown, and Malfunction Plan ( SSMP) Requirement for SSM and SSMP; content of SSMP Yes § 63.6( f)( 1) Compliance Except During SSM You must comply with emission standards at all times except during SSM Yes § 63.6( f)( 2)( 3) Methods for Determining Compliance Compliance based on performance test, operation and maintenance plans, records, inspection Yes § 63.6( g)( 1)( 3) Alternative Standard Procedures for getting an alternative standard Yes § 63.6( h)( 1)( 9) Opacity/ Visible Emission ( VE) Standards Requirements for opacity and visible emission standards NA § 63.6( i)( 1)( 14) Compliance Extension Procedures and criteria for Administrator to grant compliance extension Yes § 63.6( i)( 15) [ Reserved]

§ 63.6( i)( 16) Compliance Extension Compliance extension and Administrator's authority Yes § 63.6( j) Presidential Compliance Exemption President may exempt source category from requirement to comply with rule Yes § 63.7( a)( 1)( 2) Performance Test Dates Dates for conducting initial performance testing and other compliance demonstrations; must conduct 180 days after first subject to rule Yes 86 § 63.7( a)( 3) Section 114 Authority Administrator may require a performance test under CAA section 114 at any time Yes § 63.7( b)( 1) Notification of Performance Test Must notify Administrator 60 days before the test Yes § 63.7( b)( 2) Notification of Rescheduling If have to reschedule performance test, must notify Administrator as soon as practicable Yes § 63.7( c) Quality Assurance/ Test Plan Requirement to submit sitespecific test plan 60 days before the test or on date Administrator agrees with; test plan approval procedures; performance audit requirements; internal and external QA procedures for testing Yes § 63.7( d) Testing Facilities Requirements for testing facilities Yes § 63.7( e)( 1) Conditions for Conducting Performance Tests Performance tests must be conducted under representative conditions; cannot conduct performance tests during SSM; not a violation to exceed standard during SSM Yes § 63.7( e)( 2) Conditions for Conducting Performance Tests Must conduct according to rule and EPA test methods unless Administrator approves alternative Yes § 63.7( e)( 3) Test Run Duration Must have three test runs for at least the time specified in the relevant standard; compliance is based on arithmetic mean of three runs; specifies conditions when data from an additional test run can be used Yes § 63.7( f) Alternative Test Method Procedures by which Administrator can grant approval to use an alternative test method Yes § 63.7( g) Performance Test Data Analysis Must include raw data in performance test report; must submit performance test data 60 days after end of test with the notification of compliance status; keep data for 5 years Yes § 63.7( h) Waiver of Tests Procedures for Administrator to waive performance test Yes 87 § 63.8( a)( 1) Applicability of Monitoring Requirements Subject to all monitoring requirements in standard Yes § 63.8( a)( 2) Performance Specifications Performance Specifications in Appendix B of Part 60 apply Yes § 63.8( a)( 3) [ Reserved]

§ 63.8( a)( 4) Monitoring with Flares Requirements for flares in § 63.11 apply. NA § 63.8( b)( 1) Monitoring Must conduct monitoring according to standard unless Administrator approves alternative Yes § 63.8( b)( 2)( 3) Multiple Effluents and Multiple Monitoring Systems Specific requirements for installing monitoring systems; must install on each effluent before it is combined and before it is released to the atmosphere unless Administrator approves otherwise; if more than one monitoring system on an emission point, must report all monitoring system results, unless one monitoring system is a backup Yes § 63.8( c)( 1) Monitoring System Operation and Maintenance Maintain monitoring system in a manner consistent with good air pollution control practices Yes § 63.8( c)( 1)( i) Operation and Maintenance of CMS Must maintain and operate CMS in accordance with § 63.6( e)( 1) Yes § 63.8( c)( 1)( ii) Spare Parts for CMS Must maintain spare parts for routine CMS repairs Yes § 63.8( c)( 1)( iii) SSMP for CMS Must develop and implement SSMP for CMS Yes § 63.8( c)( 2)( 3) Monitoring System Installation Must install to get representative emission of parameter measurements; must verify operational status before or at performance test Yes 88 § 63.8( c)( 4) Continuous Monitoring System ( CMS) Requirements CMS must be operating except during breakdown, out of control, repair, maintenance, and high level calibration drifts; COMS must have a minimum of one cycle of sampling and analysis for each successive 10 second period and one cycle of data recording for each successive 6 minute period; CEMS must have a minimum of one cycle of operation for each successive 15 minute period Yes § 63.8( c)( 5) COMS Minimum Procedures COMS minimum procedures NA § 63.8( c)( 6)( 8) CMS Requirements Zero and high level calibration check requirements; out ofcontrol periods Yes § 63.8( d) CMS Quality Control Requirements for CMS quality control, including calibration, etc.; must keep quality control plan on record for 5 years. Keep old versions for 5 years after revisions Yes § 63.8( e) CMS Performance Evaluation Notification, performance evaluation test plan, reports Yes § 63.8( f)( 1)( 5) Alternative Monitoring Method Procedures for Administrator to approve alternative monitoring Yes § 63.8( f)( 6) Alternative to Relative Accuracy Test Procedures for Administrator to approve alternative relative accuracy tests for CEMS Yes § 63.8( g) Data Reduction COMS 6 minute averages calculated over at least 36 evenly spaced data points; CEMS 1 hour averages computed over at least 4 equally spaced data points; data that can't be used in average; rounding of data Yes § 63.9( a) Notification Requirements Applicability and State delegation Yes § 63.9( b)( 1)( 2) Initial Notifications Submit notification 120 days after effective date; contents of notification Yes § 63.9( b)( 3) [ Reserved] 89 § 63.9( b)( 4)( 5) Initial Notifications Submit notification 120 days after effective date; notification of intent to construct/ reconstruct; notification of commencement of construct/ reconstruct; notification of startup; contents of each Yes § 63.9( c) Request for Compliance Extension Can request if cannot comply by date or if installed BACT/ LAER Yes § 63.9( d) Notification of Special Compliance Requirements for New Source For sources that commence construction between proposal and promulgation and want to comply 3 years after effective date Yes § 63.9( e) Notification of Performance Test Notify Administrator 60 days prior Yes § 63.9( f) Notification of VE/ Opacity Test Notify Administrator 30 days prior No § 63.9( g) Additional Notifications When Using CMS Notification of performance evaluation; notification using COMS data; notification that exceeded criterion for relative accuracy Yes § 63.9( h)( 1)( 6) Notification of Compliance Status Contents; due 60 days after end of performance test or other compliance demonstration, except for opacity/ VE, which are due 30 days after; when to submit to Federal vs. State authority Yes § 63.9( i) Adjustment of Submittal Deadlines Procedures for Administrator to approve change in when notifications must be submitted Yes § 63.9( j) Change in Previous Information Must submit within 15 days after the change Yes § 63.10( a) Recordkeeping/ Reporting Applies to all, unless compliance extension; when to submit to Federal vs. State authority; procedures for owners of more than 1 source Yes § 63.10( b)( 1) Recordkeeping/ Reporting General Requirements; keep all records readily available; keep for 5 years Yes 90 § 63.10( b)( 2)( i) ( iv) Records Related to Startup, Shutdown, and Malfunction Occurrence of each of operation ( process equipment); occurrence of each malfunction of air pollution equipment; maintenance on air pollution control equipment; actions during startup, shutdown, and malfunction Yes § 63.10( b)( 2)( vi) and ( x)( xi) CMS Records Malfunctions, inoperative, out of control Yes § 63.10( b)( 2)( vii) ( ix) Records Measurements to demonstrate compliance with compliance options and operating requirements; performance test, performance evaluation, and visible emission observation results; measurements to determine conditions of performance tests and performance evaluations Yes § 63.10( b)( 2)( xii) Records Records when under waiver Yes § 63.10( b)( 2)( xiii) Records Records when using alternative to relative accuracy test Yes § 63.10( b)( 2)( xiv) Records All documentation supporting initial notification and notification of compliance status Yes § 63.10( b)( 3) Records Applicability determinations Yes § 63.10( c)( 1) ( 6),( 9)( 15) Records Additional records for CMS Yes § 63.10( c)( 7)( 8) Records Records of excess emissions and parameter monitoring exceedances for CMS No § 63.10( d)( 1) General Reporting Requirements Requirement to report Yes § 63.10( d)( 2) Report of Performance Test Results When to submit to Federal or State authority Yes § 63.10( d)( 3) Reporting Opacity or VE Observations What to report and when NA § 63.10( d)( 4) Progress Reports Must submit progress reports on schedule if under compliance extension Yes 91 § 63.10( d)( 5) Startup, Shutdown, and Malfunction Reports Contents and submission Yes § 63.10( e)( 1)( 2) Additional CMS Reports Must report results for each CEM on a unit; written copy of performance evaluation; 3 copies of COMS performance evaluation Yes § 63.10( e)( 3) Reports Excess Emission Reports No § 63.10( e)( 4) Reporting COMS data Must submit COMS data with performance test data NA § 63.10( f) Waiver for Recordkeeping/ R eporting Procedures for Administrator to waive Yes § 63.11 Flares Requirements for flares NA § 63.12 Delegation State authority to enforce standards Yes § 63.13 Addresses Addresses where reports, notifications, and requests are send Yes § 63.14 Incorporation by Reference Test methods incorporated by reference Yes § 63.15 Availability of Information Public and confidential information Yes Appendix A to Subpart DDDD of Part 63   Alternative Procedure to Determine Capture Efficiency from Enclosures Around Hot Presses in the Plywood and Composite Wood Products Industry Using Sulfur Hexafluoride Tracer Gas 1.0 Scope and Application.

This procedure has been developed specifically for the rule for the plywood and composite wood products ( PCWP) industry and is used to determine the capture efficiency of a partial hot press enclosure in that industry. This procedure is applicable for the determination of capture efficiency for enclosures around hot presses and is an alternative to the construction of temporary total enclosures ( TTEs). Sulfur hexafluoride ( SF6) is used as a tracer gas ( other tracer gases may be used if approved by the Administrator). This gas is not indigenous to the ambient atmosphere and is nonreactive.

This procedure uses infrared spectrometry ( IR) as the analytical technique. When the infrared spectrometer used is a Fourier Transform Infrared spectrometer ( FTIR), an 92 alternate instrument calibration procedure may be used; the alternate calibration procedure is the calibration transfer standard ( CTS) procedure of EPA Method 320. Other analytical techniques which are capable of equivalent Method Performance ( Section 13.0) also may be used. Specifically, gas chromatography with electron capture detection ( GC/ ECD) is an applicable technique for analysis of SF6.

2.0 Summary of Method.

A constant mass flow rate of SF6 tracer gas is released through manifolds at multiple locations within the enclosure to mimic the release of HAP during the press process. This test method requires a minimum of three SF6 injection points ( two at the press unloader and one at the press) and provides details about considerations for locating the injection points. An infrared spectrometer ( or GC/ ECD) is used to measure the concentration of SF6 at the inlet duct to the control device ( outlet duct from enclosure). Simultaneously, EPA Method 2 is used to measure the flow rate at the inlet duct to the control device. The concentration and flow rate measurements are used to calculate the mass emission rate of SF6 at the control device inlet. Through calculation of the mass of SF6 released through the manifolds and the mass of SF6 measured at the inlet to the control device, the capture efficiency of the enclosure is calculated.

In addition, optional samples of the ambient air may be taken at locations around the perimeter of the enclosure to quantify the ambient concentration of SF6 and to identify those areas of the enclosure that may be performing less efficiently; these samples would be taken using disposable syringes and would be analyzed using a GC/ ECD.

Finally, in addition to the requirements specified in this procedure, the data quality objectives ( DQO) or lower confidence limit ( LCL) criteria specified in Appendix A to 40 CFR part 63, subpart KK, Data Quality Objective and Lower Confidence Limit Approaches for Alternative Capture Efficiency Protocols and Test Methods, must also be satisfied. A minimum of three test runs are required for this procedure; however, additional test runs may be required based on the results of the DQO or LCL analysis.

3.0 Definitions.

3.1 Capture efficiency ( CE). The weight per unit time of SF6 entering the control device divided by the weight per unit time of SF6 released through manifolds at multiple 93 locations within the enclosure.

3.2 Control device ( CD). The equipment used to reduce, by destruction or removal, press exhaust air pollutants prior to discharge to the ambient air.

3.3 Control/ destruction efficiency ( DE). The volatile organic compound or HAP removal efficiency of the control device.

3.4 Data Quality Objective ( DQO) Approach. A statistical procedure to determine the precision of the data from a test series and to qualify the data in the determination of capture efficiency for compliance purposes. If the results of the DQO analysis of the initial three test runs do not satisfy the DQO criterion, the LCL approach can be used or additional test runs must be conducted. If additional test runs are conducted, then the DQO or LCL analysis is conducted using the data from both the initial test runs and all additional test runs.

3.5 Lower Confidence Limit ( LCL) Approach. An alternative statistical procedure that can be used to qualify data in the determination of capture efficiency for compliance purposes. If the results of the LCL approach produce a CE that is too low for demonstrating compliance, then additional test runs must be conducted until the LCL or DQO is met. As with the DQO, data from all valid test runs must be used in the calculation.

3.6 Minimum Measurement Level ( MML). The minimum tracer gas concentration expected to be measured during the test series. This value is selected by the tester based on the capabilities of the IR spectrometer ( or GC/ ECD) and the other known or measured parameters of the hot press enclosure to be tested. The selected MML must be above the low level calibration standard and preferably below the mid level calibration standard.

3.7 Method 204. The U. S. EPA Method 204, " Criteria For and Verification of a Permanent or Temporary Total Enclosure" ( 40 CFR part 51, Appendix M).

3.8 Method 205. The U. S. EPA Method 205, " Verification of Gas Dilution Systems for Field Instrument Calibrations" ( 40 CFR part 51, Appendix M).

3.9 Method 320. The U. S. EPA Method 320, " Measurement of Vapor Phase Organic and Inorganic Emissions by Extractive Fourier Transform Infrared ( FTIR) Spectroscopy" ( 40 CFR part 94 63, Appendix A).

3.10 Overall capture and control efficiency ( CCE). The collection and control/ destruction efficiency of both the PPE and CD combined. The CCE is calculated as the product of the CE and DE.

3.11 Partial press enclosure ( PPE). The physical barrier that " partially" encloses the press equipment, captures a significant amount of the associated emissions, and transports those emissions to the CD.

3.12 Test series. A minimum of three test runs or, when more than three runs are conducted, all of the test runs conducted.

4.0 Interferences.

There are no known interferences.

5.0 Safety.

Sulfur hexafluoride is a colorless, odorless, nonflammable liquefied gas. It is stable and nonreactive and, because it is noncorrosive, most structural materials are compatible with it. The Occupational Safety and Health Administration PEL TWA and TLV TWA concentrations are 1,000 parts per million. Sulfur hexafluoride is an asphyxiant. Exposure to an oxygen deficient atmosphere ( less than 19.5 percent oxygen) may cause dizziness, drowsiness, nausea, vomiting, excess salivation, diminished mental alertness, loss of consciousness, and death. Exposure to atmospheres containing less than 12 percent oxygen will bring about unconsciousness without warning and so quickly that the individuals cannot help themselves. Contact with liquid or cold vapor may cause frostbite. Avoid breathing sulfur hexafluoride gas. Self contained breathing apparatus may be required by rescue workers. Sulfur hexafluoride is not listed as a carcinogen or a potential carcinogen.

6.0 Equipment and Supplies.

This method requires equipment and supplies for: ( a) the injection of tracer gas into the enclosure, ( b) the measurement of the tracer gas concentration in the exhaust gas entering the control device, and ( c) the measurement of the volumetric flow rate of the exhaust gas entering the control device. In addition, the requisite equipment needed for EPA Methods 1  4 will be required. Equipment and supplies for optional ambient air sampling are discussed in 95 Section 8.6.

6.1 Tracer Gas Injection.

6.1.1 Manifolds. This method requires the use of tracer gas supply cylinder( s) along with the appropriate flow control elements. Figure 1 shows a schematic drawing of the injection system showing potential locations for the tracer gas manifolds. Figure 2 shows a schematic drawing of the recommended configuration of the injection manifold. Three tracer gas discharge manifolds are required at a minimum.

6.1.2 Flow Control Meter. Flow control and measurement meter for measuring the quantity of tracer gas injected. A mass flow, volumetric flow, or critical orifice control meter can be used for this method. The meter must be accurate to within ± 5 percent at the flow rate used. This means that the flow meter must be calibrated against a primary standard for flow measurement at the appropriate flow rate.

6.2 Measurement of Tracer Gas Concentration.

6.2.1 Sampling Probes. Use Pyrex or stainless steel sampling probes of sufficient length to reach the traverse points calculated according to EPA Method 1.

6.2.2 Sampling Line. Use a heated Teflon sampling line to transport the sample to the analytical instrument.

6.2.3 Sampling Pump. Use a sampling pump capable of extracting sufficient sample from the duct and transporting to the analytical instrument.

6.2.4 Sample Conditioning System. Use a particulate filter sufficient to protect the sampling pump and analytical instrument. At the discretion of the tester and depending on the equipment used and the moisture content of the exhaust gas, it may be necessary to further condition the sample by removing moisture using a condenser.

6.2.5 Analytical Instrument. Use one of the following analytical instruments.

<IP_ADDRESS> Spectrometer. Use an infrared spectrometer designed to measuring SF6 tracer gas and capable of meeting or exceeding the specifications of this procedure. An FTIR meeting the specifications of Method 320 may be used.

<IP_ADDRESS> GC/ ECD. Use a GC/ ECD designed to measure SF6 tracer gas and capable of meeting or exceeding the specifications of this procedure.

6.2.6 Recorder. At a minimum, use a recorder with 96 linear strip chart. An automated data acquisition system ( DAS) is recommended.

6.3 Exhaust Gas Flow Rate Measurement. Use equipment specified for EPA Methods 2, 3, and 4 for measuring flow rate of exhaust gas at the inlet to the control device.

7.0 Reagents and Standards.

7.1 Tracer Gas. Use SF6 as the tracer gas. The manufacturer of the SF6 tracer gas should provide a recommended shelf life for the tracer gas cylinder over which the concentration does not change more than ± 2 percent from the certified value. A gas mixture of SF6 diluted with nitrogen should be used; based on experience and calculations, pure SF6 gas is not necessary to conduct tracer gas testing. Select a concentration and flow rate that is appropriate for the analytical instrument's detection limit, the minimum measurement level ( MML), and the exhaust gas flow rate from the enclosure ( see section 8.1.1). You may use a tracer gas other than SF6 with the prior approval of the Administrator. If you use an approved tracer gas other than SF6, all references to SF6 in this protocol instead refer to the approved tracer gas.

7.2 Calibration Gases. The SF6 calibration gases required will be dependent on the selected MML and the appropriate span selected for the test. Commercial cylinder gases certified by the manufacturer to be accurate to within 1 percent of the certified label value are preferable, although cylinder gases certified by the manufacturer to 2 percent accuracy are allowed. Additionally, the manufacturer of the SF6 calibration gases should provide a recommended shelf life for each calibration gas cylinder over which the concentration does not change more than ± 2 percent from the certified value. Another option allowed by this method is for the tester to obtain high concentration certified cylinder gases and then use a dilution system meeting the requirements of EPA Method 205, 40 CFR part 51, Appendix M, to make multi level calibration gas standards. Low level, mid level, and high level calibration gases will be required. The MML must be above the low level standard, the high level standard must be no more than four times the low level standard, and the mid level standard must be approximately halfway between the high and low level standards. See section 12.1 for an example calculation of this procedure. Note: If using an FTIR as the analytical instrument, the tester has the option of following the CTS procedures of Method 320; the calibration standards ( and procedures) specified in Method 320 may be used in lieu of the 97 calibration standards and procedures in this protocol.

7.2.1 Zero Gas. High purity nitrogen.

7.2.2 Low Level Calibration Gas. An SF6 calibration gas in nitrogen with a concentration equivalent to 20 to 30 percent of the applicable span value.

7.2.3 Mid Level Calibration Gas. An SF6 calibration gas in nitrogen with a concentration equivalent to 45 to 55 percent of the applicable span value.

7.2.4 High Level Calibration Gas. An SF6 calibration gas in nitrogen with a concentration equivalent to 80 to 90 percent of the applicable span value.

8.0 Sample Collection, Preservation, Storage, and Transport.

8.1 Test Design.

8.1.1 Determination of Minimum Tracer Gas Flow Rate.

<IP_ADDRESS> Determine ( via design calculations or measurements) the approximate flow rate of the exhaust gas through the enclosure ( acfm).

<IP_ADDRESS> Calculate the minimum tracer gas injection rate necessary to assure a detectable SF6 concentration at the exhaust gas measurement point ( see section 12.1 for calculation).

<IP_ADDRESS> Select a flow meter for the injection system with an operating range appropriate for the injection rate selected.

8.1.2 Determination of the Approximate Time to Reach Equilibrium.

<IP_ADDRESS> Determine the volume of the enclosure.

<IP_ADDRESS> Calculate the air changes per minute of the enclosure by dividing the approximate exhaust flow rate ( <IP_ADDRESS> above) by the enclosed volume ( <IP_ADDRESS> above).

<IP_ADDRESS> Calculate the time at which the tracer concentration in the enclosure will achieve approximate equilibrium. Divide 3 by the air changes per minute ( <IP_ADDRESS> above) to establish this time. This is the approximate length of time for the system to come to equilibrium. Concentration equilibrium occurs when the tracer concentration in the enclosure stops changing as a function of time for a constant tracer release rate. Because the press is continuously cycling, equilibrium may be exhibited by a repeating, but stable, cyclic pattern rather than a single constant concentration value. Assure 98 sufficient tracer gas is available to allow the system to come to equilibrium, and to sample for a minimum of 20 minutes and repeat the procedure for a minimum of three test runs. Additional test runs may be required based on the results of the DQO and LCL analyses described in 40 CFR part 63, subpart KK, Appendix A.

8.1.3 Location of Injection Points. This method requires a minimum of three tracer gas injection points. The injection points should be located within leak prone, VOC/ HAP producing areas around the press, or horizontally within 12 inches of the defined equipment. One potential configuration of the injection points is depicted in Figure 1. The effect of wind, exfiltration through the building envelope, and air flowing through open building doors should be considered when locating tracer gas injection points within the enclosure. The injection points should also be located at a vertical elevation equal to the VOC/ HAP generating zones. The injection points should not be located beneath obstructions that would prevent a natural dispersion of the gas. Document the selected injection points in a drawing( s).

8.1.4 Location of Flow Measurement and Tracer Sampling. Accurate CD inlet gas flow rate measurements are critical to the success of this procedure. Select a measurement location meeting the criteria of EPA Method 1 ( 40 CFR part 60, Appendix A), Sampling and Velocity Traverses for Stationary Sources. Also, when selecting the measurement location, consider whether stratification of the tracer gas is likely at the location ( e. g., do not select a location immediately after a point of air in leakage to the duct).

8.2 Tracer Gas Release. Release the tracer gas at a calculated flow rate ( see section 12.1 for calculation) through a minimum of three injection manifolds located as described above in 8.1.3. The tracer gas delivery lines must be routed into the enclosure and attached to the manifolds without violating the integrity of the enclosure.

8.3 Pretest Measurements.

8.3.1 Location of Sampling Point( s). If stratification is not suspected at the measurement location, select a single sample point located at the centroid of the CD inlet duct or at a point no closer to the CD inlet duct walls than 1 meter. If stratification is suspected, establish a " measurement line" that passes through the centroidal area and in the direction of any expected stratification. Locate three traverse points at 16.7, 50.0 and 83.3 percent of the measurement line and sample from 99 each of these three points during each run, or follow the procedure in section 8.3.2 to verify whether stratification does or does not exist.

8.3.2 Stratification Verification. The presence or absence of stratification can be verified by using the following procedure. While the facility is operating normally, initiate tracer gas release into the enclosure. For rectangular ducts, locate at least nine sample points in the cross section such that the sample points are the centroids of similarly shaped, equal area divisions of the cross section. Measure the tracer gas concentration at each point. Calculate the mean value for all sample points. For circular ducts, conduct a 12 point traverse ( i. e., six points on each of the two perpendicular diameters) locating the sample points as described in 40 CFR part 60, Appendix A, Method 1. Perform the measurements and calculations as described above. Determine if the mean pollutant concentration is more than 10 percent different from any single point. If so, the cross section is considered to be stratified, and the tester may not use a single sample point location, but must use the three traverse points at 16.7, 50.0, and 83.3 percent of the entire measurement line. Other traverse points may be selected, provided that they can be shown to the satisfaction of the Administrator to provide a representative sample over the stack or duct cross section.

8.4 CD Inlet Gas Flow Rate Measurements. The procedures of EPA Methods 1 4 ( 40 CFR part 60, Appendix A) are used to determine the CD inlet gas flow rate. Molecular weight ( Method 3) and moisture ( Method 4) determinations are only required once for each test series. However, if the test series is not completed within 24 hours, then the molecular weight and moisture measurements should be repeated daily. As a minimum, velocity measurements are conducted according to the procedures of Methods 1 and 2 before and after each test run, as close to the start and end of the run as practicable. A velocity measurement between two runs satisfies both the criterion of " after" the run just completed and " before" the run to be initiated. Accurate exhaust gas flow rate measurements are critical to the success of this procedure. If significant temporal variations of flow rate are anticipated during the test run under normal process operating conditions, take appropriate steps to accurately measure the flow rate during the test. Examples of steps that might be taken include: 1) conducting additional velocity traverses during the test run; or 2) continuously monitoring a single point of average velocity during the run and using these data, in conjunction with the pre and post test traverses, to calculate an average 100 velocity for the test run.

8.5 Tracer Gas Measurement Procedure.

8.5.1 Calibration Error Test. Immediately prior to the emission test ( within 2 hours of the start of the test), introduce zero gas and high level calibration gas at the calibration valve assembly. Zero and calibrate the analyzer according to the manufacturer's procedures using, respectively, nitrogen and the calibration gases. Calculate the predicted response for the low level and mid level gases based on a linear response line between the zero and highlevel response. Then introduce the low level and mid level calibration gases successively to the measurement system. Record the analyzer responses for the low level and midlevel calibration gases and determine the differences between the measurement system responses and the predicted responses using the equation in section 12.3. These differences must be less than 5 percent of the respective calibration gas value. If not, the measurement system must be replaced or repaired prior to testing. No adjustments to the measurement system shall be conducted after the calibration and before the drift determination ( section 8.5.4). If adjustments are necessary before the completion of the test series, perform the drift checks prior to the required adjustments and repeat the calibration following the adjustments. If multiple electronic ranges are to be used, each additional range must be checked with a mid level calibration gas to verify the multiplication factor. Note: If using an FTIR for the analytical instrument, you may choose to follow the pretest preparation, evaluation, and calibration procedures of Method 320 ( section 8.0) ( 40 CFR part 63, Appendix A) in lieu of the above procedure.

8.5.2 Response Time Test. Conduct this test once prior to each test series. Introduce zero gas into the measurement system at the calibration valve assembly. When the system output has stabilized, switch quickly to the high level calibration gas. Record the time from the concentration change to the measurement system response equivalent to 95 percent of the step change. Repeat the test three times and average the results.

8.5.3 SF6 Measurement. Sampling of the enclosure exhaust gas at the inlet to the CD should begin at the onset of tracer gas release. If necessary, adjust the tracer gas injection rate such that the measured tracer gas concentration at the CD inlet is within the spectrometer's calibration range ( i. e., between the MML and the span value). Once the tracer gas concentration reaches 101 equilibrium, the SF6 concentration should be measured using the infrared spectrometer continuously for at least 20 minutes per run. Continuously record ( i. e., record at least once per minute) the concentration. Conduct at least three test runs. On the recording chart, in the data acquisition system, or in a log book, make a note of periods of process interruption or cyclic operation such as the cycles of the hot press operation. Table 1 summarizes the physical measurements required for the enclosure testing.

Note: If a GC/ ECD is used as the analytical instrument, a continuous record ( at least once per minute) likely will not be possible; make a minimum of five injections during each test run. Also, the minimum test run duration criterion of 20 minutes applies.