12.8.4  Whenever the data from a pair of sorbent traps must be invalidated and no quality-assured data from a certified backup Hg monitoring system or Hg reference method are available to cover the hours in the data collection period, treat those hours in the manner specified in the applicable regulation (i.e., use missing data substitution procedures or count the hours as monitoring system down time, as appropriate).

13.0  Monitoring System Performance

   These monitoring criteria and procedures have been successfully applied to coal-fired utility boilers (including units with post-combustion emission controls), having vapor-phase Hg concentrations ranging from 0.03 μg/dscm to approximately 100 μg/dscm.

14.0  Pollution Prevention [Reserved]

15.0  Waste Management [Reserved]

16.0  Alternative Procedures [Reserved]

17.0  Bibliography

	17.1  40 CFR Part 60, Appendix B, "Performance Specification 2 - Specifications and Test Procedures for SO2 and NOX Continuous Emission Monitoring Systems in Stationary Sources."

	17.2  40 CFR Part 60, Appendix B, "Performance Specification 12A - Specifications and Test Procedures for Total Vapor Phase Mercury Continuous Emission Monitoring Systems in Stationary Sources."
Appendix F  -  [Amended]
2a. Appendix F to 40 CFR part 60 is amended to add Procedure 5 to read as follows:
Appendix F to Part 60  -  Quality Assurance Procedures

* * * * *
Procedure 5. Quality Assurance Requirements for Vapor Phase Mercury Continuous Emissions Monitoring Systems and Sorbent Trap Monitoring Systems Used for Compliance Determination at Stationary Sources
1.0  Applicability and Principle
      1.1  Applicability. The purpose of Procedure 5 is to establish the minimum requirements for evaluating the effectiveness of quality control (QC) and quality assurance (QA) procedures as well as the quality of data produced by vapor phase mercury (Hg) continuous emission monitoring systems (CEMS) and sorbent trap monitoring systems. Procedure 5 applies to Hg CEMS and sorbent trap monitoring systems used for continuously determining compliance with emission standards or operating permit limits as specified in an applicable regulation or permit. Other QA/QC procedures may apply to other auxiliary monitoring equipment that may be needed to determine Hg emissions in the units of measure specified in an applicable permit or regulation.
Procedure 5 covers the measurement of Hg emissions as defined in Performance Specification 12A (PS 12A) and Performance Specification 12B (PS 12B) in appendix B to this part, i.e., total vapor phase Hg representing the sum of the elemental (Hg[o], CAS Number 7439-97-6) and oxidized (Hg[+2]) forms of gaseous Hg.
Procedure 5 specifies the minimum requirements for controlling and assessing the quality of Hg CEMS and sorbent trap monitoring system data submitted to EPA or a delegated permitting authority.  You must meet these minimum requirements if you are responsible for one or more Hg CEMS or sorbent trap monitoring systems used for compliance monitoring. We encourage you to develop and implement a more extensive QA program or to continue such programs where they already exist.
You must comply with the basic requirements of Procedure 5 immediately following successful completion of the initial performance test described in PS 12A or PS 12B in appendix B to this part (as applicable).
      1.2  Principle. The QA procedures consist of two distinct and equally important functions. One function is the assessment of the quality of the Hg CEMS or sorbent trap monitoring system data by estimating accuracy. The other function is the control and improvement of the quality of the CEMS or sorbent trap monitoring system data by implementing QC policies and corrective actions. These two functions form a control loop: When the assessment function indicates that the data quality is inadequate, the quality control effort must be increased until the data quality is acceptable. In order to provide uniformity in the assessment and reporting of data quality, this procedure explicitly specifies assessment methods for calibration drift, system integrity, and accuracy. Several of the procedures are based on those of PS 12A and PS 12B in appendix B to this part.  Because the control and corrective action function encompasses a variety of policies, specifications, standards, and corrective measures, this procedure treats QC requirements in general terms to allow each source owner or operator to develop a QC system that is most effective and efficient for the circumstances.
2.0  Definitions
	2.1  Mercury Continuous Emission Monitoring System (Hg CEMS) means the equipment required for the determination of the total vapor phase Hg concentration in the stack effluent.  The Hg CEMS consists of the following major subsystems:
	2.1.1  Sample Interface means that portion of the CEMS used for one or more of the following: sample acquisition, sample transport, sample conditioning, and protection of the monitor from the effects of the stack effluent.
	2.1.2  Hg Analyzer means that portion of the Hg CEMS that measures the total vapor phase Hg concentration and generates a proportional output.
	2.1.3  Data Recorder means that portion of the CEMS that provides a permanent electronic record of the analyzer output.  The data recorder may provide automatic data reduction and CEMS control capabilities.
	2.2   Sorbent Trap Monitoring System means the total equipment required for the collection of gaseous Hg samples using paired three-partition sorbent traps as described in PS 12B in appendix B to this part.
	2.3  Span Value means the measurement range as specified for the affected source category in the applicable regulation and/or monitoring performance specification.
	2.4  Zero, Mid-Level, and High Level Values means the reference gas concentrations used for calibration drift assessments and system integrity checks on a Hg CEMS, expressed as percentages of the span value (see section 7.1 of PS 12A in appendix B to this part).
	2.5  Calibration Drift (CD) means the absolute value of the difference between the CEMS output response and either the upscale Hg reference gas or the zero-level Hg reference gas, expressed as a percentage of the span value, when the entire CEMS, including the sampling interface, is challenged after a stated period of operation during which no unscheduled maintenance, repair, or adjustment took place.
      2.6  System Integrity (SI) Check means a test procedure assessing transport and measurement of oxidized Hg by a Hg CEMS.  In particular, system integrity is expressed as the absolute value of the difference between the CEMS output response and the reference value of either a mid- or high-level mercuric chloride (HgCl2) reference gas, as a percentage of span, when the entire CEMS, including the sampling interface, is challenged.
	2.7 Relative Accuracy (RA) means the absolute mean difference between the pollutant concentrations determined by a continuous monitoring system (e.g., Hg CEMS or sorbent trap monitoring system) and the values determined by a reference method (RM) plus the 2.5 percent error confidence coefficient of a series of tests divided by the mean of the RM tests.  Alternatively, for sources with an average RM concentration less than 5.0 micrograms per standard cubic meter (μg/scm), the RA may be expressed as the absolute value of the difference between the mean CEMS and RM values.
	2.8  Relative Accuracy Test Audit (RATA)  means an audit test procedure consisting of at least nine runs, in which the accuracy of the total vapor phase Hg concentrations measured by a CEMS or sorbent trap monitoring system is evaluated by comparison against concurrent measurements made with a reference test method.
	2.9 Quarterly Gas Audit (QGA) means an audit procedure in which the accuracy of the total vapor phase Hg concentrations measured by a CEMS is evaluated by challenging the CEMS with a zero and two upscale reference gases.
3.0  QC Requirements
      3.1  Each source owner or operator must develop and implement a QC program. At a minimum, each QC program must include written procedures which should describe in detail, complete, step-by-step procedures and operations for each of the following activities (as applicable):
      (a) Calibration drift (CD) checks of Hg CEMS.
      (b) CD determination and adjustment of Hg CEMS.
      (c)  Weekly system integrity check procedures for Hg CEMS.
      (d)  Routine operation, maintenance, and QA/QC procedures for sorbent trap monitoring systems.
      (e) Routine and preventive maintenance procedures for Hg CEMS (including spare parts inventory).
      (f) Data recording, calculations, and reporting.
      (g) Accuracy audit procedures for Hg CEMS and sorbent trap monitoring systems including sampling and analysis methods.
      (h) Program of corrective action for malfunctioning Hg CEMS and sorbent trap monitoring systems.
These written procedures must be kept on record and available for inspection by the responsible enforcement agency.  Also, as noted in Section 5.2.4, below, whenever excessive inaccuracies of a Hg CEMS occur for two consecutive quarters, the source owner or operator must revise the current written procedures or modify or replace the  CEMS or sorbent trap monitoring system to correct the deficiency causing the excessive inaccuracies.
4.0  Calibration Drift (CD) Assessment
      4.1  CD Requirement. As described in 40 CFR 60.13(d) and 63.8(c), source owners and operators of Hg CEMS must check, record, and quantify the CD at two concentration values at least once daily (approximately 24 hours) in accordance with the method prescribed by the manufacturer. The Hg CEMS calibration must, as minimum, be adjusted whenever the daily zero (or low-level) CD or the daily high-level CD exceeds two times the limits of the applicable PS in appendix B of this part.
      4.2  Recording Requirement for Automatic CD Adjusting CEMS. CEMS that automatically adjust the data to the corrected calibration values (e.g., microprocessor control) must either be programmed to record the unadjusted concentration measured in the CD prior to resetting the calibration, if performed, or to record the amount of adjustment.
      4.3  Criteria for Excessive CD. If either the zero (or low-level) or high-level CD result exceeds twice the applicable drift specification in section 13.2 of PS 12A in appendix B to this part for five, consecutive, daily periods, the CEMS is out-of-control.  If either the zero (or low-level) or high-level CD result exceeds four times the applicable drift specification in PS 12A during any CD check, the CEMS is out-of-control. If the CEMS is out-of-control, take necessary corrective action.  Following corrective action, repeat the CD checks.
      4.3.1  Out-Of-Control Period Definition. The beginning of the out-of-control period is the time corresponding to the completion of the fifth, consecutive, daily CD check with a CD in excess of two times the allowable limit, or the time corresponding to the completion of the daily CD check preceding the daily CD check that results in a CD in excess of four times the allowable limit. The end of the out-of-control period is the time corresponding to the completion of the CD check following corrective action that results in the CD's at both the zero (or low-level) and high-level measurement points being within the corresponding allowable CD limit (i.e., either two times or four times the allowable limit in the applicable PS in appendix B).
      4.3.2  CEMS Data Status During Out-of-Control Period. During the period the CEMS is out-of-control, the CEMS data may not be used either to determine compliance with an emission limit or to meet a minimum data availability requirement specified in an applicable regulation or permit.
5.0  Data Accuracy Assessment
      5.1  Hg CEMS Audit Requirements. For each Hg CEMS, an accuracy audit shall be performed at least once each calendar quarter.  Successive quarterly audits shall, to the extent practicable, be performed no less than 2 months apart. The audits shall be conducted as follows:
      5.1.1  Relative Accuracy Test Audit (RATA). A RATA of the Hg CEMS must be conducted at least once every four calendar quarters, except as otherwise noted in section 5.1.4 of this appendix. Perform the RATA as described in section  8.5 of PS 12A in appendix B to this part.  Calculate the results according to section 12.4 of PS 12A.
      5.1.2  Quarterly Gas Audit.  A quarterly gas audit (QGA) may be conducted in three of four calendar quarters, but in no more than three quarters in succession.  To perform a QGA, challenge the CEMS with a zero-level and two upscale level audit gases of known concentrations, first of elemental Hg and then of oxidized Hg, within the following ranges:
                                  Audit point
                                  Audit range
                                       1
                            20 to 30% of span value
                                       2
                            50 to 60% of span value
Sequentially inject each of the three audit gases (zero and two upscale), three times each for a total of nine injections. Inject the gases in such a manner that the entire CEMS is challenged.  Do not inject the same gas concentration twice in succession.
 Use elemental Hg and oxidized Hg (mercuric chloride, HgCl2) audit gases that are National Institute of Standards and Technology (NIST)-certified or NIST-traceable following an EPA Traceability Protocol.  If audit gas cylinders are used, do not dilute gas when challenging the Hg CEMS.  For each reference gas concentration, determine the average of the three CEMS responses and subtract the average response from the reference gas value.  Calculate the measurement error at each gas level using Equation 12A-1 in section 8.2 of PS 12A.
      5.1.3  Relative Accuracy Audit (RAA). As an alternative to the QGA, a RAA may be conducted in three of four calendar quarters, but in no more than three quarters in succession. To conduct a RAA, follow the RATA test procedures in section 8.5 of  PS 12A in appendix B to this part, except that only three test runs are required.
      5.1.4  Alternative Quarterly Audits.  Alternative quarterly audit procedures may be used as approved by the Administrator for three of four calendar quarters. One RATA is required at least every four calendar quarters, except in the case where the affected facility is off-line (does not operate) in the fourth calendar quarter since the quarter of the previous RATA.  In that case, the RATA shall be performed in the quarter in which the unit recommences operation. Also, quarterly gas audits (or RAAs, if applicable) are not required for calendar quarters in which the affected facility does not operate.
      5.2  Sorbent Trap Monitoring System Audit Requirements. For each sorbent trap monitoring system, a RATA must be conducted at least once every four calendar quarters, except as otherwise noted in section 5.1.4 of this appendix.  Perform the RATA as described in section  8.3 of PS 12B in appendix B to this part.  Calculate the results according to section 12.4 of PS 12A.
      5.3  Excessive Audit Inaccuracy. If the results of a RATA, QGA, or RAA exceed the applicable criteria in section 5.3.3, the Hg CEMS or sorbent trap monitoring system is out-of-control. If the Hg CEMS or sorbent trap monitoring system is out-of-control, take necessary corrective action to eliminate the problem. Following corrective action, the source owner or operator must audit the CEMS or sorbent trap monitoring system using the same type of test that failed to meet the accuracy criterion.  For instance, a RATA must always be performed following an out-of-control period resulting from a failed RATA. Whenever audit results show the Hg CEMS or sorbent trap monitoring system to be out-of-control, the owner or operator must report both the results of the failed test and the results of the retest following corrective action showing the CEMS to be operating within specifications.
      5.3.1  Out-Of-Control Period Definition. The beginning of the out-of-control period is the hour immediately following the completion of a RATA, RAA, QGA or system integrity check that fails to meet the applicable performance criteria in section 5.3.3, below. The end of the out-of-control period is the time corresponding to the completion of a subsequent successful test of the same type.
      5.3.2  Monitoring Data Status During Out-Of-Control Period. During the period the monitor is out-of-control, the monitoring data may not be used to determine compliance with an applicable emission limit or to meet a minimum data availability requirement in an applicable regulation or permit.
      5.3.3  Criteria for Excessive Audit Inaccuracy. Unless specified otherwise in an applicable regulation or permit, the criteria for excessive inaccuracy are:
      (a) For the RATA, the allowable RA in the applicable PS in appendix B (e.g., PS 12A or PS 12B).
      (b) For the QGA, +-15 percent of the average audit value or +-0.5 ug/m[3], whichever is greater.
      (c) For the RAA, +-20 percent of the three run average or +-10 percent of the applicable standard, whichever is greater.
      5.3.4  Criteria for Acceptable QC Procedures. Repeated excessive inaccuracies (i.e., out-of-control conditions resulting from the quarterly audits) indicates the QC procedures are inadequate or that the CEMS or sorbent trap monitoring system is incapable of providing quality data. Therefore, whenever excessive inaccuracies occur for two consecutive quarters, the source owner or operator must revise the QC procedures (see Section 3) or modify, repair, or replace the CEMS or sorbent trap monitoring system.
6.0  Reporting Requirements
      6.1  Data Assessment Report.  At the reporting interval specified in the applicable regulation or permit, report for each Hg CEMS and/or sorbent trap monitoring system the accuracy assessment results from Section 5, above.  For Hg CEMS, also report the CD assessment results from Section 4, above.  Report this information as a Data Assessment Report (DAR), and include the appropriate DAR(s) with the emissions report required under the applicable regulation or permit.
      6.2   Contents of the DAR.  At a minimum, the DAR must contain the following information:
      6.2.1  Facility name and address including identification of source owner/operator.
      6.2.2  Identification and location of each Hg CEMS and/or sorbent trap monitoring system.
      6.2.3  Manufacturer, model, and serial number of each Hg CEMS and/or sorbent trap monitoring system.
      6.2.4  CD Assessment for each Hg CEMS, including the identification of out-of-control periods.
      6.2.5   System integrity check data for each Hg CEMS.
      6.2.6   Accuracy assessment for each Hg CEMS and/or sorbent trap monitoring system, including the identification of out-of-control periods.  The results of all required RATAs, QGAs, RAAs, and audits of auxiliary equipment shall be reported.  If an accuracy audit shows a CEMS or sorbent trap monitoring system to be out-of-control, report both the audit results that caused the out-of-control period and the results of the retest following corrective action, showing the monitoring system to be operating within specifications.
      6.2.6. Summary of all corrective actions taken when the Hg CEMS and/or sorbent trap monitoring system was determined to be out-of-control.
      6.3  Data Retention. As required in 40 CFR 60.7(d) and 63.10(b), all measurements from CEMS and sorbent trap monitoring systems, including the quality assurance data required by this procedure, must be retained by the source owner for at least 5 years.
7.0  Bibliography
      7.1 Calculation and Interpretation of Accuracy for Continuous Emission Monitoring Systems (CEMS). Section 3.0.7 of the Quality Assurance Handbook for Air Pollution Measurement Systems, Volume III, Stationary Source Specific Methods. EPA - 600/4 - 77 - 027b. August 1977. U.S. Environmental Protection Agency. Office of Research and Development Publications, 26 West St. Clair Street, Cincinnati, OH 45268.

Figure 1 -- Example Format for Data Assessment Report
Period ending date____________________
Year____________________
Company name____________________
Plant name____________________
Source unit no.____________________
CEMS manufacturer____________________
Model no.____________________
CEMS serial no.____________________
CEMS type (e.g., extractive)____________________
CEMS sampling location (e.g., control device outlet)____________________
CEMS span values as per the applicable regulation: ________________
I. Accuracy assessment results (complete A, B, or C below for each Hg CEMS).  If the quarterly audit results show the Hg CEMS to be out-of-control, report the results of both the quarterly audit and the audit following corrective action showing the Hg CEMS to be operating properly.
A. Relative accuracy test audit (RATA) for _________ (e.g., Hg in g/m[3]).
1. Date of audit _________.
2. Reference methods (RM) used __________ (e.g., Method 30B).
3. Average RM value __________ (e.g., g/m[3]).
4. Average CEMS value ________.
5. Absolute value of mean difference [d] ________.
6. Confidence coefficient [CC] ________.
7. Percent relative accuracy (RA) ________ percent.
8. Performance audit sample results:
a. Audit lot number (1) _______ (2) ________.
b. Audit sample number (1) ________ (2) ________.
c. Results (g/m[3] ) (1) ________ (2) ________.
d. Actual value (g/m[3])* (1) ________ (2) ________.
e. Relative error* (1) ________ (2) ________.
B. Cylinder gas audit (GA) for _________ (e.g., Hg in g/m[3]).

                                 Audit point 1
                                 Audit point 2

1. Date of audit

2. Mercury gas generator
or cylinder ID number

3. Date of certification

4. Type of certification

(e.g., Interim EPA Traceability Protocol for Elemental or Oxidized Mercury Gas Generators)
5. Audit gas value

(e.g., g/m[3])
6. CEMS response value

(e.g., g/m[3])
7. Accuracy

percent
C. Relative accuracy audit (RAA) for ________ (e.g., Hg in g/m[3]).
1. Date of audit ________.
2. Reference methods (RM) used ________ (e.g., Method 30B).
3. Average RM value ____ (e.g., g/m[3]).
4. Average CEMS value ________.
5. Accuracy ________ percent.
6. EPA performance audit results:
a. Audit lot number (1) ________ (2) ________.
b. Audit sample number (1) ________ (2) ________.
c. Results (Hg in g/m[3]) (1) ________ (2) _________.
d. Actual value (g/m[3]) *(1) ________ (2) ________.
e. Relative error*(1) ________ (2) ________.
*To be completed by the Agency.
D. Corrective action for excessive inaccuracy.
1. Out-of-control periods.
a. Date(s) _________.
b. Number of days ________.
  2. Corrective action taken________________________________________________.
3. Results of audit following corrective action.  (Use format of A, B, or C above, as applicable.)
II. Calibration drift assessment.
A. Out-of-control periods.
1. Date(s) _____________.
2. Number of days __________.
  B. Corrective action taken_________________________________________________.

PART 63--[AMENDED]
	8.  The authority citation for part 63 continues to read as follows:
	Authority:  42 U.S.C. 7401, et seq.
Subpart LLL -- [Amended]
	9.  Section 63.1340 is amended to read as follows:
§63.1340  What parts of my plant does this subpart cover?
	(a)  The provisions of this subpart apply to each new and existing portland cement plant which is a major source or an area source as defined in §63.2.
	(b)  The affected sources subject to this subpart are:
	(1)  Each kiln including alkali bypasses, except for kilns that burn hazardous waste and are subject to and regulated under subpart EEE of this part;
	(2)  Each clinker cooler at any portland cement plant;
	(3)  Each raw mill at any portland cement plant;
	(4)  Each finish mill at any portland cement plant;
	(5)  Each raw material dryer at any portland cement plant;
	(6)  Each raw material, clinker, or finished product storage bin at any portland cement plant;
	(7)  Each conveying system transfer point including those associated with coal preparation used to convey coal from the mill to the kiln at any portland cement plant; and
	(8)  Each bagging and bulk loading and unloading system at any portland cement plant.
	(c)  Crushers are not covered by this subpart regardless of their location.
      (d) If you are subject to any of the provisions of this subpart you are also subject to title V permitting requirements.
      10.  Section 63.1341 is amended by adding definitions for "Clinker," "Crusher," "New source," "Total organic HAP" and "Totally enclosed conveying system transfer point" in alphabetic order to read as follows:
§63.1341  Definitions.
*  *  *  *  *
Clinker means the product of the process in which limestone and other materials are heated in the kiln and is then ground with gypsum and other materials to form cement.
*  *  *  *  *
Crusher means a machine designed to reduce large rocks from the quarry into materials approximately the size of gravel.
*  *  *  *  *
Enclosed Storage Pile means any storage pile that is completely enclosed in a building or structure consisting of a solid roof and walls.
*  *  *  *  *
Inactive Clinker Pile is a pile of clinker material that has not been disturbed, removed, and/or added to as a result of loading, unloading, and/or transferring activities for 30 (thirty) consecutive days.
*  *  *  *  *
Kiln means a device, including any associated preheater or precalciner devices, inline raw mills, or alkali bypasses that produces clinker by heating limestone and other materials for subsequent production of portland cement.  Because the inline raw mill is considered an integral part of the kiln, for purposes of determining the appropriate emissions limit, the term kiln also applies to the exhaust of the inline raw mill.
*  *  *  *  *
New source means any source that commenced construction after May 6, 2009, for purposes of determining the applicability of the kiln, clinker cooler and raw material dryer emissions limits for mercury, PM, THC, and HCl.
*  *  *  *  *
Total organic HAP means, for the purposes of this subpart, the sum of the concentrations of compounds of formaldehyde, benzene, toluene, styrene, m-xylene, p-xylene, o-xylene, acetaldehyde, and naphthalene as measured by EPA Test Method 320 of appendix A to this part or ASTM D6348-03.  Only the measured concentration of the listed analytes that are present at concentrations exceeding one-half the quantitation limit of the analytical method are to be used in the sum.  If any of the analytes are not detected or are detected at concentrations less than one-half the quantitation limit of the analytical method, the concentration of those analytes will be assumed to be zero for the purposes of calculating the total organic HAP for this subpart.
*  *  *  *  *
Totally enclosed conveying system transfer point shall mean a conveying system transfer point that is enclosed on all sides, top, and bottom.
*  *  *  *  *
      11.  Section 63.1343 is amended to read as follows:
§63.1343  What Standards Apply to my Kilns, Clinker Coolers, and Raw Material Dryers?
	(a)  General.  The provisions in this section apply to each kiln and any alkali bypass associated with that kiln, clinker cooler, and raw material dryer.  All dioxin furan (D/F), HCl, and total hydrocarbon (THC) emission limits are on a dry basis.  The D/F, HCl and THC limits for kilns are corrected to 7 percent oxygen except during periods of startup and shutdown.  The raw material dryer THC limits are corrected to 19 percent oxygen except during startup and shutdown.  During startup and shutdown no oxygen correction is applied.  All (THC) emission limits are measured as propane.  Standards for mercury, PM, and THC are based on a 30-day rolling average, except for periods of startup and shutdown, where the standard is based on a 7-day rolling average.  If using aCEMSto determine compliance with the HCl standard, this standard is based on a 30-day rolling average, except for periods of startup and shutdown, where the standard is based on a 7-day rolling average.  You must ensure appropriate corrections for moisture are made when measuring flowrates used to calculate particulate matter (PM) and mercury emissions.
      b)  Kilns, clinker coolers, raw material dryers, raw mils, and finish mills.  The emission limits for these sources are shown in table 1 below.

Table 1.  Emissions Limits for Kilns, Clinker Coolers, Raw Material Dryers, Raw Mills, and Finish Mills.

If your source is
And the operating mode is:
And if is located
Your emissions limits are
And The units of the emission limit are
The oxygen correction factor is:
An existing  kiln
Normal Operation or malfunction
At a major or area source
PM - 0.04
D/F  -  0.2[1]
Mercury  -  46
THC - 24[2,3]
lb/ton clinker
ng/dscm
lb/MM tons clinker
ppmvd
NA
7 percent
NA
7 percent
An existing  kiln
Normal Operation or malfunction
At a major source
HCl - 2
ppmvd

An existing  kiln
Startup or shutdown
At a major or area source
PM - 0.04
D/F  -  0.2[1]
Mercury  -  46
THC - 24[2,3]
gr/dscf
ng/dscm
ug/dscm
ppmvd
NA
NA
NA
NA
An existing  kiln
Startup or shutdown
At a major source
HCl - 2
ppmvd
NA
A new  kiln
Normal Operation or malfunction
At a major or area source
PM - 0.01
D/F  -  0.2[1]
Mercury  -  46
THC - 24[2,3]
lb/ton clinker
ng/dscm
lb/MM tons clinker
ppmvd
NA
7 percent
NA
7 percent
A new  kiln
Normal Operation or malfunction
At a major source
HCl - 2
ppmvd

A new  kiln
Startup or shutdown
At a major or area source
PM - 0.0008
D/F  -  0.2[1]
Mercury  -  9
THC - 24[2,3]
gr/dscf
ng/dscm
ug/dscm
ppmvd
NA
NA
NA
NA
A new  kiln
Startup or shutdown
At a major source
HCl - 2
ppmvd
NA
A existing clinker cooler
Normal Operation or malfunction
At a major or area source
PM - 0.04

lb/ton clinker
NA
A existing clinker cooler
Startup or shutdown
At a major or area source
PM  -  0.004
gr/dscf
NA
A new clinker cooler
Normal Operation or malfunction
At a major or area source
PM  -  0.01
lb/ton clinker
NA
A new clinker cooler
Startup or shutdown
At a major or area source
PM  -  0.0001
gr/dscf
NA
Existing and new raw material dryers
Normal Operation or malfunction
At a major or area source
THC - 24[2,3]
ppmvd
7 percent
Existing and new raw material dryers
Startup or shutdown
At a major or area source
THC - 24[2,3]
ppmvd
7 percent
Existing and new raw material dryers
All operating modes
At a major source
Opacity - 10
percent
NA
New and existing raw and finish mills
All operating modes

Opacity - 10
percent
NA

1  If the average temperatures at the inlet to the first particulate matter control device (fabric filter or electrostatic precipitator) during the D/F performance test is 400 [o]F or less this limit is changed to 0.04 ng/dscm.
[2]  Measured as propane.
[3]  Any source subject to the 24 ppmvd THC limit may elect to meet an alternative limit of 9 ppmvd for total organic HAP.  If the source demonstrates compliance with the total organic HAP under the requirements of § 63.1349 then the source's THC limit will be adjusted to equal the average THC emissions measured during the organic HAP compliance test.

	(2)  When there is an alkali bypass associated with a kiln, the combined PM emissions from the kiln or in-line kiln/raw mill and the alkali bypass stack are subject to the PM emissions limit.  Existing kilns that combine the clinker cooler exhaust with the kiln exhaust for energy efficiency purposes and send the combined exhaust to the PM control device as a single stream may meet an alternative PM emissions limit.  This limit is calculated using the following equation:
	PM alt  =  0.004 x 1.65 x (Qk + Qc)/7000  		(Eq. 1)
            Where: 0.004 is the PM exhaust concentration equivalent to 0.04 lb per ton clinker where clinker cooler and kiln exhaust gas are not combined.
      Qk is the exhaust flow of the kiln (dscf/ton raw 			feed)
		Qc is the exhaust flow of the clinker cooler (dscf/ton 		  	raw feed)

For new kilns that combine kiln exhaust and clinker cooler gas the limit is calculated as follows:
	PM alt  =  0.0008 x 1.65 x (Qk + Qc)/7000  		(Eq. 2)
            Where: 0.0008 is the PM exhaust concentration equivalent to 0.01 lb per ton clinker where clinker cooler and kiln exhaust gas are not combined.
      Qk is the exhaust flow of the kiln (dscf/ton raw 			feed)
		Qc is the exhaust flow of the clinker cooler (dscf/ton 		  	raw feed)

12.  Section 63.1344 is amended to read as follows:
§63.1344  Emissions Limits for Open Clinker Piles.
      (a)  If clinker material storage and handling activities occur more than 1,000 feet from the facility property-line you must comply with the following:
      (1) Utilize a three-sided barrier with roof, provided the open side is covered with a wind fence material of a maximum 20% porosity, allowing a removable opening for vehicle access. The removable wind fence for vehicle access may be removed only during minor or routine maintenance activities, the creation or reclamation of outside storage piles, the importation of clinker from outside the facility, and reclamation of plant clean-up materials. The removable opening shall be less than 50% of the total surface area of the wind fence and the amount of time shall be minimized to the extent feasible.
      (2) Contain storage and handling of material that is immediately adjacent to the three-sided barrier within an area next to the structure with a wind fence on at least two sides, with at least a 5 foot freeboard above the top of the storage pile to provide wind sheltering, and completely cover the material with an impervious tarp, revealing only the active disturbed portion during material loading and unloading activities.
      (3)  Storage and handling of other active clinker material shall be conducted within an area surrounded on three sides by a barrier or wind fences with one side of the wind fence facing the prevailing wind and at least a 5-foot freeboard above the top of the storage pile to provide wind sheltering. The clinker shall remain completely covered at all times with an impervious tarp, revealing only the active disturbed portion during material loading and unloading activities. The barrier or wind fence shall extend at least 20 feet beyond the active portion of the material at all times.
   (4)  Inactive clinker material may be alternatively stored using a continuous and impervious tarp, covered at all times, provided records are kept demonstrating the inactive status of such stored material.
      (b)  If clinker material storage and handling activities occur 1,000 feet or less from the facility property-line these activities must be in an enclosed storage area that meets the emissions limits specified in §63.1345.
13.  Section 63.1345 is amended to read as follows:
§63.1345  Emissions Limits for affected sources other than kilns; in-line kiln/raw mills; clinker coolers; new and reconstructed raw material dryers; and raw and finish mills.
The owner or operator of each new or existing raw material, clinker, or finished product storage bin; conveying system transfer point; bagging system; and bulk loading or unloading system; and each existing raw material dryer, at a facility which is a major source subject to the provisions of this subpart shall not cause to be discharged any gases from these affected sources which exhibit opacity in excess of ten percent.
	14.  Section 63.1346 is amended to read as follows:
§63.1346  Operating limits for kilns.
      (a) The owner or operator of a kiln subject to a D/F emission limitation under §63.1343 must operate the kiln such that the temperature of the gas at the inlet to the kiln particulate matter control device (PMCD) and alkali bypass PMCD, if applicable, does not exceed the applicable temperature limit specified in paragraph (b) of this section. The owner or operator of an in-line kiln/raw mill subject to a D/F emission limitation under §63.1343 must operate the in-line kiln/raw mill, such that:
(1) When the raw mill of the in-line kiln/raw mill is operating, the applicable temperature limit for the main in-line kiln/raw mill exhaust, specified in paragraph (b) of this section and established during the performance test when the raw mill was operating is not exceeded, except during periods of startup/shutdown when the temperature limit may be exceeded by no more than 10 percent.
(2) When the raw mill of the in-line kiln/raw mill is not operating, the applicable temperature limit for the main in-line kiln/raw mill exhaust, specified in paragraph (b) of this section and established during the performance test when the raw mill was not operating, is not exceeded, except during periods of startup/shutdown when the temperature limit may be exceeded by no more than 10 percent.
(3) If the in-line kiln/raw mill is equipped with an alkali bypass, the applicable temperature limit for the alkali bypass specified in paragraph (b) of this section and established during the performance test, with or without the raw mill operating, is not exceeded, except during periods of startup/shutdown when the temperature limit may be exceeded by no more than 10 percent.
      (b) The temperature limit for affected sources meeting the limits of paragraph (a) of this section or paragraphs (a)(1) through (a)(3) of this section is determined in accordance with §63.1349(b)(3)(iv).
	(c)  The owner or operator of an affected source subject to a D/F emission limitation under §63.1343 that employs carbon injection as an emission control technique must operate the carbon injection system in accordance with paragraphs (c)(1) and (c)(2) of this section.
      (1) The three-hour rolling average activated carbon injection rate shall be equal to or greater than the activated carbon injection rate determined in accordance with §63.1349(b)(3)(vi).
      (2) The owner or operator shall either:
      (i) Maintain the minimum activated carbon injection carrier gas flow rate, as a three-hour rolling average, based on the manufacturer's specifications. These specifications must be documented in the test plan developed in accordance with §63.7(c), or
      (ii) Maintain the minimum activated carbon injection carrier gas pressure drop, as a three-hour rolling average, based on the manufacturer's specifications. These specifications must be documented in the test plan developed in accordance with §63.7(c).
	(d)  Except as provided in paragraph (e) of this section, the owner or operator of an affected source subject to a D/F emission limitation under §63.1343 that employs carbon injection as an emission control technique must specify and use the brand and type of activated carbon used during the performance test until a subsequent performance test is conducted, unless the site-specific performance test plan contains documentation of key parameters that affect adsorption and the owner or operator establishes limits based on those parameters, and the limits on these parameters are maintained.
	(e)  The owner or operator of an affected source subject to a D/F emission limitation under §63.1343 that employs carbon injection as an emission control technique may substitute, at any time, a different brand or type of activated carbon provided that the replacement has equivalent or improved properties compared to the activated carbon specified in the site-specific performance test plan and used in the performance test. The owner or operator must maintain documentation that the substitute activated carbon will provide the same or better level of control as the original activated carbon.
      f) No kiln may use as a raw material or fuel any fly ash where the mercury content of the fly ash has been increased through the use of activated carbon, or any other sorbent unless the facility can demonstrate that the use of that fly ash will not result in an increase in mercury emissions over baseline emissions (i.e., emissions not using the fly ash). The facility has the burden of proving there has been no emissions increase over baseline.  Once the kiln is in compliance with a mercury limit specified in §63.1343, this paragraph no longer applies.
	15.  Section 63.1347 is amended to read as follows:
§ 63.1347  Operation and Maintenance Plan Requirements.
(a) The owner or operator of each portland cement plant shall prepare, for each affected source subject to the provisions of this subpart, a written operations and maintenance plan.  The plan shall be submitted to the Administrator for review and approval as part of the application for a part 70 permit and shall include the following information:
(1) Procedures for proper operation and maintenance of the affected source and air pollution control devices in order to meet the emission limits and operating limits of §§63.1343 through 63.1348;
(2) Corrective actions to be take when required by paragraph §63.1350 (f)(3);
(3) Procedures to be used during an inspection of the components of the combustion system of each kiln and each in-line kiln raw mill located at the facility at least once per year.
(b) Failure to comply with any provision of the operations and maintenance plan developed in accordance with this section shall be a violation of the standard.
16.  Section 63.1348 is amended to read as follows:
§ 63.1348   Compliance Requirements.
(a) Initial Compliance Requirements.  The owner or operator of an affected source subject to this subpart shall demonstrate initial compliance with the emissions standards and operating limits by using the test methods and procedures in §§63.1349 and 63.7.
(1) PM Compliance. The owner or operator of an affected source subject to limitations on PM emissions under §63.1343(b)(1) and (c)(1) and §63.1345(a) shall demonstrate initial compliance with the PM emissions standards by using the test methods and procedures in §63.1349(b)(1).
(i) The owner or operator of an affected source subject to limitations on PM emissions shall demonstrate initial compliance by conducting a  test as specified in §63.1349(b)(1)(i).
(ii) Compliance with the PM emissions standard shall be determined by calculating the average of three hourly average PM emission rates in lb/ton of clinker using Equation 1 in §63.1349(b)(1)(iii) or Equation 2 of §63.1349(b)(1)(iv).
 (2) Opacity Compliance. The owner or operator of an affected source subject to the limitations on opacity under §§63.1346(a)(1), 63.1347, and/or 63.1348 shall demonstrate initial compliance with the opacity emissions standards by using the test methods and procedures in §63.1349(b)(2). The maximum 6-minute average opacity exhibited during the test period shall be used to determine whether the affected source is in initial compliance with the standard.
(3) D/F Compliance.
(i) The owner or operator of an affected source subject to limitations on D/F emissions under §63.1343(b)(2) and (c)(2) shall demonstrate initial compliance with the D/F emissions standards by using the test methods and procedures in §63.1349(b)(3). The owner or operator of an in-line kiln/raw mill shall demonstrate initial compliance by conducting separate performance tests while the raw mill of the in-line kiln/raw mill is operating and the raw mill of the in-line kiln/raw mill is not operating. The D/F concentration shall be determined for each run and the arithmetic average of the concentrations measured for the three runs shall be calculated to determine compliance.
(ii) The owner or operator of an affected source subject to a D/F emission limitation under §63.1343(b)(2) and (c)(2) shall demonstrate initial compliance with the temperature operating limits specified in §63.1344 by using the test methods and procedures in §63.1349(b)(3)(ii) through (b)(3)(iv).  The average of the run temperatures will determine the applicable temperature limit.
(iii) If activated carbon injection is used, the owner or operator of an affected source subject to a D/F emission limitation under §63.1343(b)(2) and (c)(2) shall demonstrate initial compliance with the activated carbon injection rate operating limits specified in §63.1344 by using the test methods and procedures in §63.1349(b)(3)(v).  The average of the run injection rates will determine the applicable injection rate limit.
(iv) If activated carbon injection is used, the owner or operator shall also develop a carrier gas parameter during the performance test conducted under §63.1349(b)(3) that meets the requirements of §63.1349(b)(3)(vi).  Compliance is demonstrated if the system is maintained within +/- 5 percent accuracy during the performance test.
(4)(i) THC Compliance. The owner or operator of an affected source subject to limitations on THC emissions under §63.1343(b)(3) and (c)(3) and §63.1346(a)(2) shall demonstrate initial compliance with the THC emissions standards by using the test methods and procedures in §63.1349(b)(4)(i). The average THC concentration obtained during the 24-hour test shall be used to determine initial compliance.
(ii) Total Organic HAP Emissions Tests. If a source elects to demonstrate compliance with the total organic HAP emissions limit under §63.1343(b)(3) and (c)(3) and §63.1346(a)(2) in lieu of the THC emissions limit, the owner or operator shall demonstrate initial compliance with the total organic HAP emissions  standards by using the test methods and procedures in §63.1349(b)(4)(iii)  and (b)(4)(iv).
(iii) The owner or operator of an in-line kiln/raw mill demonstrating initial compliance by conducting separate performance tests as specified in §63.1349(b)(4)(iii) while the raw mill of the in-line kiln/raw mill is operating and while the raw mill of the in-line kiln/raw mill is not operating.
(iv) The average total organic HAP concentration measured during the initial performance test specified by §63.1349(b)(4)(iii) will be used to determine initial compliance.
(v) The average THC concentration measured during the initial test specified by §63.1349(b)(4)(iv) will be used to determine the site-specific THC limit.
(5) Mercury Compliance. The owner or operator of an affected source subject to limitations on mercury emissions in §63.1343(b)(4) and (c)(4) shall demonstrate initial compliance with the mercury standards by using the test methods and procedures in §63.1349(b)(5). The owner or operator of an affected source shall demonstrate initial compliance by operating a mercury CEMS or a sorbent trap based integrated monitor.  The first calendar month of daily mercury concentration data will be used to determine initial compliance.
(6) HCl Compliance.  The owner or operator of an affected source subject to limitations on HCl emissions under §63.1343(b)(5) and (c)(5) shall demonstrate initial compliance with the HCl standards by using the test methods and procedures in §63.1349(b)(6).
(i) The owner or operator of an affected source that is equipped with a wet scrubber or tray tower shall demonstrate initial compliance by conducting a performance test as specified in §63.1349(b)(6)(i). The HCl concentration shall be determined for each run and the arithmetic average of the concentrations measured for the three runs shall be calculated to determine compliance. The owner or operator must also have established appropriate site-specific parameter limits.
(ii) The owner or operator of an affected source that is not equipped with a wet scrubber or tray tower shall demonstrate initial compliance by operating a CEMS as specified in §63.1349(b)(6)(ii). The average hourly HCl concentration obtained during the 24-hour performance test shall be used to determine initial compliance.
(b) Continuous Compliance Requirements.  The owner or operator of an affected source subject to this subpart shall demonstrate continuous compliance with the emissions standards and operating limits by using the test methods and procedures in §§63.1350 and 63.8.
(1) General Requirements.
(i) The owner or operator must monitor and collect data according to this §63.1350 and the site-specific monitoring plan required by §63.1350(o).
(ii) Except for periods of monitoring system malfunctions, repairs associated with monitoring system malfunctions, and required monitoring system quality assurance or quality control activities (including, as applicable, calibration checks and required zero and span adjustments), the owner or operator must operate the monitoring system and collect data at all required intervals at all times the affected source is operating.  Any period for which data collection is required and the operation of the CEMS is not otherwise exempt and for which the monitoring system is out-of-control and data are not available for required calculations constitutes a deviation from the monitoring requirements.
(iii) The owner or operator may not use data recorded during monitoring system malfunctions, repairs associated with monitoring system malfunctions, or required monitoring system quality assurance or control activities in calculations used to report emissions or operating levels.  A monitoring system malfunction is any sudden, infrequent, not reasonably preventable failure of the monitoring system to provide valid data.  Monitoring system failures that are caused in part by poor maintenance or careless operation are not malfunctions.  The owner or operator must use all the data collected during all other periods in assessing the operation of the control device and associated control system
(2) PM Compliance. The owner or operator of an affected source subject to limitations on PM emissions under §63.1343(b)(1) and (c)(1) and §63.1345(a) shall demonstrate continuous compliance with the with the PM emissions standards by using the monitoring methods and procedures in §63.1350(b) and (d).
(i) PM CEMS. The owner or operator of an affected source subject to limitations on PM emissions shall demonstrate continuous compliance with the PM emissions standards by using the monitoring methods and procedures in §§63.1350(b). Continuous compliance is demonstrated by a 30-day rolling average PM concentration, except for periods of startup and shutdown, where the comliance is demonstrated based on a 7-day rolling average.
(ii) Reserved.
(iii) Clinker Production. The owner or operator of an affected source subject to limitations on PM emissions (lb/ton of clinker) under §63.1343(b)(1) and (c)(1) shall demonstrate continuous compliance with the PM emissions standards by installing, operating, and maintaining a permanent weigh scale system to measure and record weight rates of the amount of clinker produced that meets the requirements of §63.1350(d).
      (3) Opacity Compliance. The owner or operator of an affected source subject to the limitations on opacity under §§63.1346(a)(1), 63.1347, and 63.1348 shall demonstrate continuous compliance with the opacity emissions standards by using the monitoring methods and procedures in §63.1350(f).
(i) Continuous compliance is demonstrated by conducting specified visible emissions observations and follow up opacity readings, as indicated in §63.1350(f)(1) and (f)(2).  The maximum 6-minute average opacity exhibited during the test period shall be used to determine whether the affected source is in compliance with the standard.  Corrective actions must be initiated within one hour of detecting visible emissions.
(ii) COMS. If the owner or operator of a raw mill or finish mill installs a COMS in lieu of conducting the daily visible emissions testing, the owner or operator shall demonstrate continuous compliance by operating and maintaining the COMS so that it meets the requirements of §63.1350(f)(4)(i).
(iii) BLDS. If the owner or operator of a raw mill or finish mill installs a BLDS in lieu of conducting the daily visible emissions testing, the owner or operator shall demonstrate continuous compliance by operating and maintaining the BLDS so that it meets the requirements of §63.1350(f)(4)(ii).
(4) D/F Compliance. The owner or operator of an affected source subject to a D/F emission limitation under §63.1343(b)(2) and (c)(2) shall demonstrate continuous compliance with the temperature operating limits specified in §63.1344 by using the installing, operating, and maintaining a continuous monitor to record the temperature of specified gas streams so that it meets the requirements of §63.1350(g). Continuous compliance is demonstrated by a 3-hour rolling average temperature.
(5)(i) Activated Carbon Injection Compliance.  If activated carbon injection is used, the owner or operator of a kiln subject to a D/F emission limitation under §63.1343(b)(2) and (c)(2) shall demonstrate continuous compliance with the activated carbon injection rate operating limits specified in §63.1344 by installing, operating, and maintaining a continuous monitor to record the rate of activated carbon injection that meets the requirements §63.1350(h)(1).  Continuous compliance is demonstrated by a 3-hour rolling average injection rate.
(ii) The owner or operator of a kiln subject to a D/F emission limitation under §63.1343(b)(2) and (c)(2) shall demonstrate continuous compliance with the activated carbon injection system gas parameter by installing, operating, and maintaining a continuous monitor to record the gas parameter that meets the requirements §63.1350(h)(2).  Continuous compliance is demonstrated by a 3-hour rolling average of the parameter value.
(6) THC Compliance. The owner or operator of an affected source subject to limitations on THC emissions under §63.1343(b)(3) and (c)(3) and §63.1346(a)(2) shall demonstrate continuous compliance with the THC emissions standards by using the monitoring methods and procedures in §63.1350 (i) and (j).  Continuous compliance is demonstrated by a 30-day rolling average THC concentration, except for periods of startup and shutdown, where the standard is based on a 7-day rolling average.
(7) Mercury Compliance. The owner or operator of an affected source subject to limitations on mercury emissions in §63.1343(b)(4) and (c)(4) shall demonstrate continuous compliance with the mercury standards by using the monitoring methods and procedures in §63.1350(k). Continuous compliance is demonstrated by a 30-day rolling average mercury concentration, except for periods of startup and shutdown, where the standard is based on a 7-day rolling average.
(8) HCl Compliance.  The owner or operator of an affected source subject to limitations on HCl emissions under §63.1343(b)(5) and (c)(5) shall demonstrate initial compliance with the HCl standards by using the test methods and procedures in §63.1349(b)(6).
(i) The owner or operator of an affected source that is not equipped with a wet scrubber or tray tower shall demonstrate continuous compliance by using the monitoring methods and procedures in §63.1350(l)(1). Continuous compliance is demonstrated by a 30-day rolling average HCl concentration, except for periods of startup and shutdown, where the standard is based on a 7-day rolling average.
(ii) The owner or operator of an affected source that is equipped with a wet scrubber or tray tower shall demonstrate continuous compliance by using the monitoring methods and procedures in §63.1350(l)(2). Continuous compliance is demonstrated by a 30-day rolling average of the required parameters, except for periods of startup and shutdown, where the standard is based on a 7-day rolling average.
(c) Changes in Operations.
(1) If an owner or operator plans to undertake a change in operations that may adversely affect compliance with an applicable standard, operating limit, or parametric monitoring value under this subpart, the source must conduct a performance test as specified in §63.1349(b).
(2) In preparation for and while conducting a performance test required in §63.1349(b), an owner or operator may operate under the planned operational change conditions for a period not to exceed 360 hours, provided that the conditions in (c)(2)(i) through (c)(2)(iv) of this section are met. The source shall submit temperature and other monitoring data that are recorded during the pretest operations.
(i) The owner or operator of a source must provide the Administrator written notice at least 60 days prior to undertaking an operational change that may adversely affect compliance with an applicable standard under this subpart, or as soon as practicable where 60 days advance notice is not feasible. Notice provided under this paragraph shall include a description of the planned change, the emissions standards that may be affected by the change, and a schedule for completion of the performance test required under paragraph (c)(1) of this section, including when the planned operational change period would begin.
(ii) The performance test results must be documented in a test report according to §63.1349 (a).
(iii) A test plan must be made available to the Administrator prior to testing, if requested.
(iv) The performance test must be conducted completed within 360 hours after the planned operational change period begins.
      17.  Section 63.1349 is amended to read as
§ 63.1349   Performance testing requirements.
      (a) Performance test results shall be documented in complete test reports that contain the information required by paragraphs (a)(1) through (a)(10) of this section, as well as all other relevant information. As described in §63.7(c)(2)(i), the site-specific plan to be followed during testing shall be made available to the Administrator prior to testing, if requested.
      (1) A brief description of the process and the air pollution control system;
      (2) Sampling location description(s);
      (3) A description of sampling and analytical procedures and any modifications to standard procedures;
      (4) Test results;
      (5) Quality assurance procedures and results;
      (6) Records of operating conditions during the test, preparation of standards, and calibration procedures;
      (7) Raw data sheets for field sampling and field and laboratory analyses;
      (8) Documentation of calculations;
      (9) All data recorded and used to establish parameters for monitoring; and
      (10) Any other information required by the test method.
      (b)(1) PM Emissions Tests.
      (i)(A) The owner or operator of an affected source subject to the limitations on emissions of PM shall install, operate, calibrate, and maintain a PM CEMS in accordance with the requirements in §63.1350(b).
      (B) The owner or operator shall determine, record, and maintain a record of the accuracy of the volumetric flow rate monitoring system according to the procedures in §63.1350(m)(5).
      (C) The initial compliance test shall be based on the first calendar month of operation in which the affected source operates using a CEMS. Hourly PM concentration and stack gas volumetric flow rate data shall be obtained.
      (ii) The owner or operator must install, calibrate, maintain, and operate a permanent weigh scale system, or use another method approved by the Administrator, to measure and record weight rates in tons-mass per hour of the amount of clinker produced. The system of measuring hourly clinker production must be maintained within +-5 percent accuracy. The owner or operator shall determine, record, and maintain a record of the accuracy of the system of measuring hourly clinker production before initial use (for new sources) or within 30 days of the effective date of this rule (for existing sources). The use of a system that directly measures kiln feed rate and uses a conversion factor to determine the clinker production rate is an acceptable method.
      (iii) The emission rate, E, of PM (lb/ton of clinker) shall be computed for each run using equation 1 of this section:

Where:
E = emission rate of particulate matter, kg/metric ton (lb/ton) of clinker production;
Cs= concentration of particulate matter, g/dscm (gr/dscf);
Qsd= volumetric flow rate of effluent gas, dscm/hr (dscr/hr);
P = total kiln clinker production rate, metric ton/hr (ton/hr); and
K = conversion factor, 1000 g/kg (7000 gr/lb).
      (iv) When there is an alkali bypass associated with a kiln or in-line kiln/raw mill, the main exhaust and alkali bypass of the kiln or in-line kiln/raw mill shall be tested simultaneously and the combined emission rate of particulate matter from the kiln or in-line kiln/raw mill and alkali bypass shall be computed for each run using equation 2 of this section:

Where:
Ec= combined emission rate of particulate matter from the kiln or in-line kiln/raw mill and bypass stack, kg/metric ton (lb/ton) of kiln clinker production;
Csk= concentration of particulate matter in the kiln or in-line kiln/raw mill effluent gas, g/dscm (gr/dscf);
Qsdk= volumetric flow rate of kiln or in-line kiln/raw mill effluent gas, dscm/hr (dscf/hr);
Csb= concentration of particulate matter in the alkali bypass gas, g/dscm (gr/dscf);
Qsdb= volumetric flow rate of alkali bypass effluent gas, dscm/hr (dscf/hr);
P= total kiln clinker production rate, metric ton/hr (ton/hr); and
K = conversion factor, 1000 g/kg (7000 gr/lb).
      (2) Opacity Tests. The owner or operator of an affected source subject to limitations on opacity under this subpart shall conduct opacity tests in accordance with Method 9 of appendix A-4 to part 60 of this chapter. The duration of the Method 9 performance test shall be 3 hours (30 6-minute averages), except that the duration of the Method 9 performance test may be reduced to 1 hour if the conditions of paragraphs (b)(2)(i) through (b)(2)(ii) of this section apply.  For batch processes that are not run for 3-hour periods or longer, compile observations totaling 3 hours when the unit is operating.
      (i) There are no individual readings greater than 10 percent opacity;
      (ii) There are no more than three readings of 10 percent for the first 1-hour period.
      (3) D/F Emissions Tests. The owner or operator of an affected source subject to limitations on D/F emissions under this subpart shall conduct a performance test using Method 23 of appendix A-7 to part 60 of this chapter. The owner or operator of a kiln or in-line kiln/raw mill equipped with an alkali bypass shall conduct simultaneous performance tests of the kiln or in-line kiln/raw mill exhaust and the alkali bypass. However, the owner or operator of an in-line kiln/raw mill may conduct a performance test of the alkali bypass exhaust when the raw mill of the in-line kiln/raw mill is operating or not operating.
      (i) Each performance test shall consist of three separate runs. The duration of each run shall be at least 3 hours, and the sample volume for each run shall be at least 2.5 dscm (90 dscf).
      (ii) The temperature at the inlet to the kiln or in-line kiln/raw mill PMCD, and, where applicable, the temperature at the inlet to the alkali bypass PMCD must be continuously recorded during the period of the Method 23 test, and the continuous temperature record(s) must be included in the performance test report.
      (iii) Hourly average temperatures must be calculated for each run of the test.
      (iv) The run average temperature must be calculated for each run, and the average of the run average temperatures must be determined and included in the performance test report and will determine the applicable temperature limit in accordance with §63.1344(b).
      (v)(A) If activated carbon injection is used for D/F control, the rate of activated carbon injection to the kiln or in-line kiln/raw mill exhaust, and where applicable, the rate of activated carbon injection to the alkali bypass exhaust, must be continuously recorded during the period of the Method 23 test in accordance with the conditions in §63.1350(m)(9), and the continuous injection rate record(s) must be included in the performance test report. Activated carbon injection rate parameters must be determined in accordance with paragraphs (b)(3)(vi) of this section.
      (B) The performance test report must include the brand and type of activated carbon used during the performance test.
      (C) The owner or operator must maintain a continuous record of either the carrier gas flow rate or the carrier gas pressure drop for the duration of the test. The system of measuring carrier gas flow rate or carrier gas pressure drop must be maintained within +/-5 percent accuracy. If the carrier gas flow rate is used, the owner or operator shall determine, record, and maintain a record of the accuracy of the carrier gas flow rate monitoring system according to the procedures in appendix A to part 75 of this chapter. If the carrier gas pressure drop is used, the owner or operator shall determine, record, and maintain a record of the accuracy of the carrier gas pressure drop monitoring system according to the procedures in §63.1350(m)(6).
      (vi) The run average injection rate must be calculated for each run and the average of the run average injection rates must be determined and included in the performance test report and will determine the applicable injection rate limit in accordance with §63.1344(c)(1).
      (4)(i) THC CEMS Relative Accuracy Test.
      (A) The owner or operator of an affected source subject to limitations on THC emissions shall operate a continuous emissions monitoring system (CEMS) in accordance with the requirements in §63.1350(1).  For the purposes of conducting the accuracy and quality assurance evaluations for CEMS, the THC span value (as propane) is 50 ppmvd. An owner or operator demonstrates compliance with a RATA when the accuracy between the CEMS and the test audit is within 20 percent or when the test audit results are within 10 percent of the standard
      (B) The initial compliance test shall be based on the 24 hours of operation in which the affected source operates using a CEMS. Hourly PM concentration and stack gas volumetric flow rate data shall be obtained.
      (ii) Total Organic HAP Emissions Tests. Instead of conducting the test specified in paragraph (b)(4)(i), the owner or operator of an affected source subject to limitations on THC emissions may conduct a performance test to determine emissions of total organic HAP, by following the procedures in paragraphs (b)(4)(iii) through (b)(4)(iv) of this section.
      (iii) Method 320 of appendix A to this part or ASTM D6348-03 shall be used to determine emissions of total organic HAP. Each performance test shall consist of three separate runs under the conditions that exist when the affected source is operating at the representative performance conditions in accordance with §63.7(e). Each run shall be conducted for at least 1 hour.
      (iv) At the same time that the owner or operator is conducting the test for total organic HAP, the owner or operator shall also determine THC emissions by operating a CEMS in accordance with the requirements of §63.1350(j). The duration of the test shall be 3 hours and the average THC concentration (as calculated from the 1-minute averages) during the 3-hour test shall be calculated.
      (5) Mercury Emissions Tests. The owner or operator of a kiln or in-line kiln/raw mill subject to limitations on mercury emissions shall operate a mercury CEMS in accordance with the requirements of §63.1350(k).  The initial compliance test shall be based on the first calendar month of operation in which the affected source operates using a CEMS.  Hourly mercury concentration and stack gas volumetric flow rate data shall be obtained.  If the source uses a sorbent trap monitoring system, daily data shall be obtained with each day assumed to equal the daily average of the sorbent trap collection period covering that day.
      (i) Owners or operators using a mercury CEMS must install, operate, calibrate, and maintain an instrument for continuously measuring and recording the exhaust gas flow rate to the atmosphere according to the requirements in§63.1350(k)(4).
      (ii) The emission rate shall be computed by dividing the average mercury concentration by the clinker production rate during the same calendar month using the Equation 3 of this section:

      Where:
E = emission rate of mercury, kg/metric ton (lb/million tons) of clinker production;
Cs = concentration of mercury, g/dscm (g/dscf);
Qsd = volumetric flow rate of effluent gas, dscm/hr (dscf/hr);
P = total kiln clinker production rate, metric ton/hr (million ton/hr); and
K = conversion factor, 1000 g/kg (454 g/lb).
      (6) HCl Emissions Tests.  The owner or operator of an affected source subject to limitations on HCl emissions shall conduct testing by one of the following methods:
      (i)(A) If your source is equipped with a wet scrubber, or tray tower, you must conduct performance testing using Method 321 of appendix A to this part.
      (B) You must establish site specific parameter limits by using the CPMS required in§63.1350(l)(1). Measure and record the liquid flow rate and pH in intervals of no more than 15 minutes during the HCl test.  Compute and record the 24-hour average pressure drop and average scrubber water flow rate for each sampling run in which the applicable emissions limit is met.
      (ii)(A) If your source is not controlled by a wet scrubber, you must operate a CEMS in accordance with the requirements of §63.1350(l)(1).  The duration of the performance test shall be 24 hours. The owner or operator shall calculate the daily average HCl concentration (as calculated from the hourly averages obtained during the performance test.)
      (B) The initial compliance test shall be based on the 24 hours of operation in which the affected source operates using a CEMS. Hourly HCl concentration and stack gas volumetric flow rate data shall be obtained.
      (c) Performance Test Frequency.  Except as provided in §63.1348(b), performance tests are required for affected sources that are subject to a dioxin, total organic HAP, or HCl, emissions limit and must be repeated every 30 months except for pollutants where that specific pollutant is monitored using CEMS.
      (d) Performance Test Reporting Requirements.
      (1) The owner or operator of an affected facility shall submit the information specified in paragraphs (d)(1)(i) and  (d)(2) of this section no later than 60 days following the initial performance test. All reports shall be signed by the facilities manager.
      (i) The initial performance test data as recorded under paragraph (b) of this section.
      (ii) The values for the site-specific operating limits or parameters established pursuant to paragraphs (b)(3), (b)(4)(iii), (b)(5)(ii), and (b)(6)(i), as applicable, and a description, including sample calculations, of how the operating parameters were established during the initial performance test.
      (2) As of December 31, 2011,  the owner or operator of an affected facility shall enter performance test data into EPA's Web FIRE data base using the Electronic Reporting Tool located at http://www.epa.gov/ttn/chief/ert/ert_tool.html.\
18.  Section 63.1350 is amended to read as follows:
§ 63.1350   Monitoring requirements.
      (a) All continuous monitoring data for periods of startup and shutdown must be compiled and averaged separately from data gathered during periods of normal operation or malfunction.
      (b) PM Monitoring Requirements for Sources Using PM CEMS.

      (1) The owner or operator of a kiln or clinker cooler subject to emissions limitation on particulate matter emissions in §63.1343 and §63.1345 using a PM CEMS shall install and operate a continuous emissions monitor in accordance with Performance Specification 11 of appendix B and Quality Assurance Procedure 2 of appendix F to part 60 of this chapter.  The owner or operator must also develop an emissions monitoring plan in accordance with paragraphs (o)(1) through (o)(4) of this section.

      (2) The owner or operator must perform Relative Response Audits annually and Response Correlation Audits every 3 years.

      (3) In order to calculate the 30-day or 7-day rolling average, collect readings at least every 15 minutes, with at least 2 valid readings during the hour.  Sum the hourly data to daily data and then into a 30-day or 7-day rolling average.

      (c) Reserved

      (d) Clinker Production Monitoring Requirements.  The owner or operator of an affected source subject to an emissions limitation on particulate matter emissions (lb/ton of clinker) shall install, calibrate, maintain, and operate a permanent weigh scale system, or use another method approved by the Administrator, to measure and record weight rates in tons - mass per hour of the amount of clinker produced.  The system of measuring hourly clinker production must be maintained within +-5 percent accuracy.

      (1) The owner or operator shall determine, record, and maintain a record of the accuracy of the system of measuring hourly clinker production before initial use (for new sources) or within 30 days of the effective date of this rule (for existing sources). During each quarter of source operation, the owner or operator shall determine, record, and maintain a record of the ongoing accuracy of the system of measuring hourly clinker production. The use of a system that directly measures kiln feed rate and uses a conversion factor to determine the clinker production rate is an acceptable method.
      (2) The owner or operator shall record the daily clinker production rates and kiln feed rates.
      (3) The owner or operator shall develop an emissions monitoring plan in accordance with paragraphs (o)(1) through (o)(4) of this section.

      (e) Reserved

      (f) Opacity Monitoring Requirements. The owner or operator of an affected source subject to a limitation on opacity under §63.1346 or §63.1348 shall conduct required emissions monitoring in accordance with the provisions of paragraphs (f)(1)(i) through (f)(1)(vii) of this section and in accordance with the operation and maintenance plan developed in accordance with (o)(1) through (o)(4) of this section. The owner of operator of an affected source subject to a limitation on opacity under §63.1347 shall conduct emissions monitoring in accordance with paragraphs (f)(2)(i) through (f)(2)(iii) of this section and in accordance with the operation and maintenance plan developed in accordance with (o)(1) through (o)(4) of this section. The owner or operator must also develop an opacity emissions monitoring plan in accordance with paragraphs (o)(1) through (o)(4) and paragraph (o)(5), if applicable, of this section.
      (1)(i)  The owner or operator must conduct a monthly 10-minute visible emissions test of each affected source in accordance with Method 22 of appendix A - 7 to part 60 of this chapter.  The test must be conducted while the affected source is in operation.
      (ii) If no visible emissions are observed in six consecutive monthly tests for any affected source, the owner or operator may decrease the frequency of testing from monthly to semi-annually for that affected source.  If visible emissions are observed during any semi-annual test, the owner or operator must resume testing of that affected source on a monthly basis and maintain that schedule until no visible emissions are observed in six consecutive monthly tests.
      (iii) If no visible emissions are observed during the semi-annual test for any affected source, the owner or operator may decrease the frequency of testing from semi-annually to annually for that affected source.  If visible emissions are observed during any annual test, the owner or operator must resume testing of that affected source on a monthly basis and maintain that schedule until no visible emissions are observed in six consecutive monthly tests.
      (iv)  If visible emissions are observed during any Method 22 test, of appendix A - 7 to part 60 of this chapter, the owner or operator must conduct five 6-minute averages of opacity in accordance with Method 9 of appendix A - 4 to part 60 of this chapter.  The Method 9 test, of appendix A - 4 to part 60 of this chapter, must begin within 1 hour of any observation of visible emissions.
      (v) The requirement to conduct Method 22 visible emissions monitoring under this paragraph shall not apply to any totally enclosed conveying system transfer point, regardless of the location of the transfer point.  "Totally enclosed conveying system transfer point" shall mean a conveying system transfer point that is enclosed on all sides, top, and bottom.  The enclosures for these transfer points shall be operated and maintained as total enclosures on a continuing basis in accordance with the facility operations and maintenance plan.
      (vi)  If any partially enclosed or unenclosed conveying system transfer point is located in a building, the owner or operator of the portland cement plant shall have the option to conduct a Method 22 test, of appendix A - 7 to part 60 of this chapter, according to the requirements of paragraphs (f)(1)(i) through (f)(1)(iv) of this section for each such conveying system transfer point located within the building, or for the building itself, according to paragraph (f)(1)(vii) of this section.
      (vii) If visible emissions from a building are monitored, the requirements of paragraphs (f)(1)(i) through (f)(1)(iv) of this section apply to the monitoring of the building, and the owner or operator of the portland cement plant must also test visible emissions from each side, roof, and vent of the building for at least 10 minutes.

      (2)(i) The owner or operator of a raw mill or finish mill shall monitor opacity by conducting daily visual emissions observations of the mill sweep and air separator PMCD of these affected sources in accordance with the procedures of Method 22 of appendix A-7 to part 60 of this chapter.  The duration of the Method 22 test shall be 6 minutes.
      (ii) Within 24 hours of the end of the Method 22 test in which visible emissions were observed, the owner or operator must conduct a followup Method 22 test of each stack from which visible emissions were observed during the previous Method 22 test.
      (iii) If visible emissions are observed during the followup Method 22 test required by paragraph (a)(5)(ii) of this section from any stack from which visible emissions were observed during the previous Method 22 test required by paragraph (a)(5)(i) of the section, the owner or operator must conduct a visual opacity test of each stack from which emissions were observed during the follow up Method 22 test in accordance with Method 9 of appendix A-4 to part 60 of this chapter.  The duration of the Method 9 test shall be 30 minutes.
      (3) Corrective Actions. If visible emissions are observed during any Method 22 visible emissions test conducted under paragraphs (f)(1) or (f)(2) of this section, the owner or operator must initiate, within one-hour, the corrective actions specified in the site specific operating and maintenance plan in paragraph (o) of this section.
      (4) The requirements under paragraph (f)(2) of this section to conduct daily Method 22 testing shall not apply to any specific raw mill or finish mill equipped with a continuous opacity monitoring system (COMS) or bag leak detection system (BLDS).
      (i) If the owner or operator chooses to install a COMS in lieu of conducting the daily visual emissions testing required under paragraph (f)(2) of this section, then the COMS must be installed at the outlet of the PM control device of the raw mill or finish mill and the COMS must be installed, maintained, calibrated, and operated as required by the general provisions in subpart A of this part and according to PS - 1 of appendix B to part 60 of this chapter.
      (ii) If the owner or operator chooses to install a BLDS in lieu of conducting the daily visual emissions testing required under paragraph (f)(2) of this section, the requirements in paragraphs (m)(1) through (m)(4), (m)(10) and (m)(11) of this section apply.

      (g) D/F Monitoring Requirements.  The owner or operator of an affected source subject to an emissions limitation on D/F emissions shall comply with the monitoring requirements of paragraphs (g)(1) through (g)(6) and paragraphs (m)(1) through (m)(4) of this section to demonstrate continuous compliance with the D/F emissions standard.  The owner or operator must also develop an emissions monitoring plan in accordance with paragraphs (o)(1) through (o)(4) of this section.
      (1) The owner or operator shall install, calibrate, maintain, and continuously operate a continuous monitor to record the temperature of the exhaust gases from the kiln, in-line kiln/raw mill, and alkali bypass, if applicable, at the inlet to, or upstream of, the kiln, in-line kiln/raw mill and/or alkali bypass PMCDs.
      (i) The temperature recorder response range must include zero and 1.5 times the average temperature established according to the requirements in §63.1349(b)(3)(iv).
      (ii) The calibration reference for the temperature measurement must be a National Institute of Standards and Technology calibrated reference thermocouple-potentiometer system or alternate reference, subject to approval by the Administrator.
      (iii) The calibration of all thermocouples and other temperature sensors shall be verified at least once every three months.
      (2) The owner or operator shall monitor and continuously record the temperature of the exhaust gases from the kiln, in-line kiln/raw mill, and alkali bypass, if applicable, at the inlet to the kiln, in-line kiln/raw mill and/or alkali bypass PMCD.
      (3) The required minimum data collection frequency shall be one minute.
      (4) Each hour, calculate the three-hour average temperature for the previous 3 hours of process operation using all of the one-minute data available (i.e., the CMS is not out-of-control.)
      (5) When the operating status of the raw mill of the in-line kiln/raw mill is changed from off to on or from on to off, the calculation of the three-hour rolling average temperature must begin anew, without considering previous recordings.
      (h) Monitoring Requirements for Sources Using Carbon Injection.  The owner or operator of an affected source subject to an operating limit on D/F emissions that employs carbon injection as an emission control technique shall comply with the additional monitoring requirements of paragraphs (h)(1) and (h)(2) and paragraphs (m)(1) through (m)(4) and (m)(9) of this section.  The owner or operator must also develop an emissions monitoring plan in accordance with paragraphs (o)(1) through (o)(4) of this section.
      (1) Install, operate, calibrate, and maintain a continuous monitor to record the rate of activated carbon injection.  The accuracy of the rate measurement device must be +-1 percent of the rate being measured.
      (i) Verify the calibration of the device at least once every three months.
      (ii) Each hour, calculate the three-hour rolling average activated carbon injection rate for the previous 3 hours of process operation using all of the one-minute data available (i.e., the CMS is not out-of-control.)
      (iii) When the operating status of the raw mill of the in-line kiln/raw mill is changed from off to on or from on to off, the calculation of the three-hour rolling average activated carbon injection rate must begin anew, without considering previous recordings.
      (2)(i) Install, operate, calibrate, and maintain a continuous monitor to record the activated carbon injection system carrier gas parameter (either the carrier gas flow rate or the carrier gas pressure drop) established during the D/F performance test in accordance with §63.1349(b)(3).
      (ii)  Each hour, calculate the three-hour rolling average of the selected parameter value for the previous 3 hours of process operation using all of the one-minute data available (i.e., the CMS is not out-of-control.)
      (i) THC Monitoring Requirements.  The owner or operator of an affected source subject to an emissions limitation on THC emissions shall comply with the monitoring requirements of paragraphs (i)(1) and (i)(2) and (m)(1) through (m)(4) of this section. The owner or operator must also develop an emissions monitoring plan in accordance with paragraphs (o)(1) through (o)(4) of this section.
      (1) The owner or operator shall install, operate, and maintain a THC continuous emission monitoring system in accordance with Performance Specification 8 of appendix B to part 60 of this chapter and comply with all of the requirements for continuous monitoring systems found in the general provisions, subpart A of this part.  The owner or operator shall operate and maintain each CEMS according to the quality assurance requirements in Procedure 1 of appendix F in part 60 of this chapter.

      (2) For sources equipped with an alkali bypass stack, instead of installing a CEMS, the source may use the results of the initial or subsequent performance test to demonstrate compliance with the THC emission limit.
      (j) Total Organic HAP Monitoring Requirements.  The owner or operator of an affected source complying with the total organic HAP emissions limits shall continuously monitor THC according to paragraph (i)(1) and (2) and (m)(1) through (m)(4) of this section.  The owner or operator must also develop an emissions monitoring plan in accordance with paragraphs (o)(1) through (o)(4) of this section.
      (k) Mercury Monitoring Requirements.  The owner or operator of a kiln or in-line kiln/raw mill subject to an emissions limitation on mercury emissions shall install and operate a mercury continuous emissions monitoring system (Hg CEMS) in accordance with Performance Specification 12A of appendix B to part 60 of this chapter or a sorbent trap-based integrated monitoring system in accordance with Performance Specification 12B of appendix B and Quality Assurance Procedure 1 of appendix F to part 60 of this chapter.  The owner or operator shall continuously monitor mercury according to paragraphs (k)(1) through (k)(3) and (m)(1) through (m)(4) of this section.  The owner or operator must also develop an emissions monitoring plan in accordance with paragraphs (o)(1) through (o)(4) of this section.
      (1) The span value for any Hg CEMS shall include the intended upper limit of the mercury concentration measurement range during normal "mill on" operation which may be exceeded during "mill off" operation or other short term conditions lasting less than 24 consecutive kiln operating hours.  However, the span should be at least equivalent to approximately two times the emissions standard and it may be rounded to the nearest multiple of 10 ug/m[3] of total mercury.
      (2) The owner or operator shall operate and maintain each Hg CEMS or sorbent trap-based integrated monitoring system according to the quality assurance requirements in Procedure 5 of appendix F to part 60 of this chapter.
      (3) Relative accuracy testing of mercury monitoring systems under Performance Specification 12A, Performance Specification 12B, or Procedure 5 shall be at normal operating conditions with the raw mill on.
      (4) Owners or operators using a mercury CEMS must install, operate, calibrate, and maintain an instrument for continuously measuring and recording the exhaust gas flow rate to the atmosphere according to the requirements in paragraphs (k)(4)(i) through (k)(4)(ix) of this section.
      (i) The owner or operator must install each sensor of the flow rate monitoring system in a location that provides representative measurement of the exhaust gas flow rate at the sampling location of the mercury CEMS, taking into account the manufacturer's recommendations.
      (ii) The flow rate monitoring system must be designed to measure the exhaust flow rate over a range that extends from a value of at least 20 percent less than the lowest expected exhaust flow rate to a value of at least 20 percent greater than the highest expected exhaust flow rate.
      (iii) The flow rate monitoring system must have a minimum accuracy of 5 percent of the flow rate or greater.
      (iv) The flow rate monitoring system must be equipped with a data acquisition and recording system that is capable of recording values over the entire range specified in paragraph (k)(1) of this section.
      (v) The signal conditioner, wiring, power supply, and data acquisition and recording system for the flow rate monitoring system must be compatible with the output signal of the flow rate sensors used in the monitoring system.
      (vi) The flow rate monitoring system must be designed to complete a minimum of one cycle of operation for each successive 15-minute period. To have a valid hour of data, the flow rate monitoring system must measure and record at least three of four equally spaced data values (or at least 75 percent of the total number of values) for each hour (not including startup, shutdown, malfunction, or out-of control periods).
      (vii) The owner or operator must perform an initial calibration of the flow rate monitoring system according to manufacturer's recommendations.
      (viii) The owner or operator must check the accuracy of the monitoring system at least once per year according to manufacturer's recommendations.
      (ix) The owner or operator must operate the flow rate monitoring system and record data during all periods of operation of the affected facility including periods of startup, shutdown, malfunction, except for monitoring system breakdowns, repairs, and calibration checks.
      (l) HCL Monitoring Requirements.  The owner or operator of an affected source subject to an emissions limitation on HCl emissions in §63.1343 shall continuously monitor THC according to paragraph (l)(1) and (2) and  paragraphs (m)(1) through (m)(4) of this section.  The owner or operator must also develop an emissions monitoring plan in accordance with paragraphs (o)(1) through (o)(4) of this section.
      (1)(i) Continuously monitor compliance with the HCl limit by operating a continuous emission monitor in accordance with Performance Specification 15 of appendix B to part 60 of this chapter.  The owner or operator shall operate and maintain each CEMS according to the quality assurance requirements in Procedure 1 of 40 CFR of appendix F to part 60 of this chapter except that the Relative Accuracy Test Audit requirements of Procedure 1 shall be replaced with the validation requirements and criteria of sections 11.1.1 and 12.0 of Performance Specification 15, or
      (2) Install, operate, and maintain a CMS to monitor wet scrubber parameters as specified in paragraphs (m)(5) and (m)(7) of this section.
      (m) Parameter Monitoring Requirements.  If you have an operating limit that requires the use of a CMS, you must install, operate, and maintain each continuous parameter monitoring system (CPMS) according to the procedures in paragraphs (n)(1) through (4) of this section by the compliance date specified in §63.1351.  You must also meet the applicable specific parameter monitoring requirements in paragraphs (m)(5) through (m)(11) that are applicable to you.
      (1) The CMS must complete a minimum of one cycle of operation for each successive 15-minute period.  You must have a minimum of four successive cycles of operation to have a valid hour of data.
      (2) The owner or operator must conduct all monitoring in continuous operation at all times that the unit is operating.
      (3) Determine the 3-hour block average of all recorded readings.
      (4) Record the results of each inspection, calibration, and validation check.
      (5) Liquid Flow Rate Monitoring Requirements.  If you have an operating limit that requires the use of a flow measurement device, you must meet the requirements in paragraphs (m)(5)(i) through (iv) of this section.
      (i) Locate the flow sensor and other necessary equipment in a position that provides a representative flow.
      (ii) Use a flow sensor with a measurement sensitivity of 2 percent of the flow rate.
      (iii) Reduce swirling flow or abnormal velocity distributions due to upstream and downstream disturbances.
      (iv) Conduct a flow sensor calibration check at least semiannually.
      (6) Specific Pressure Monitoring Requirements. If you have an operating limit that requires the use of a pressure measurement device, you must meet the requirements in paragraphs (m)(6)(i) through (vi) of this section.
      (i) Locate the pressure sensor(s) in a position that provides a representative measurement of the pressure.
      (ii) Minimize or eliminate pulsating pressure, vibration, and internal and external corrosion.
      (iii) Use a gauge with a minimum tolerance of 1.27 centimeters of water or a transducer with a minimum tolerance of 1 percent of the pressure range.
      (iv) Check pressure tap pluggage daily.
      (v) Using a manometer, check gauge calibration quarterly and transducer calibration monthly.
      (vi) Conduct calibration checks any time the sensor exceeds the manufacturer's specified maximum operating pressure range or install a new pressure sensor.
      (7) Specific pH Monitoring Requirements. If you have an operating limit that requires the use of a pH measurement device, you must meet the requirements in paragraphs (m)(7)(i) through (iii) of this section.
      (i) Locate the pH sensor in a position that provides a representative measurement of scrubber effluent pH.
      (ii) Ensure the sample is properly mixed and representative of the fluid to be measured.
      (iii) Check the pH meter's calibration on at least two points every 8 hours of process operation.
      (8) Reserved.
      (9) Mass Flow Rate (for Sorbent Injection) Monitoring Requirements.  If you have an operating limit that requires the use of equipment to monitor sorbent injection rate ( e.g. , weigh belt, weigh hopper, or hopper flow measurement device), you must meet the requirements in paragraphs (m)(9)(i) through (iii) of this section.
      (i) Locate the device in a position(s) that provides a representative measurement of the total sorbent injection rate.
      (ii) Install and calibrate the device in accordance with manufacturer's procedures and specifications.
      (iii) At least annually, calibrate the device in accordance with the manufacturer's procedures and specifications.
      (10) Bag leak detection monitoring requirements.  If you elect to use a fabric filter bag leak detection system to comply with the requirements of this subpart, you must install, calibrate, maintain, and continuously operate a bag leak detection system as specified in paragraphs (m)(10)(i) through (viii) of this section.
      (i) You must install and operate a bag leak detection system for each exhaust stack of the fabric filter.
      (ii) Each bag leak detection system must be installed, operated, calibrated, and maintained in a manner consistent with the manufacturer's written specifications and recommendations and in accordance with the guidance provided in EPA - 454/R - 98 - 015, September 1997.
      (iii) The bag leak detection system must be certified by the manufacturer to be capable of detecting particulate matter emissions at concentrations of 10 or fewer milligrams per actual cubic meter.
      (iv) The bag leak detection system sensor must provide output of relative or absolute particulate matter loadings.
      (v) The bag leak detection system must be equipped with a device to continuously record the output signal from the sensor.
      (vi) The bag leak detection system must be equipped with an alarm system that will alert an operator automatically when an increase in relative particulate matter emissions over a preset level is detected. The alarm must be located such that the alert is detected and recognized easily by an operator.
      (vii) For positive pressure fabric filter systems that do not duct all compartments of cells to a common stack, a bag leak detection system must be installed in each baghouse compartment or cell.
      (viii) Where multiple bag leak detectors are required, the system's instrumentation and alarm may be shared among detectors.
      (11) For each BLDS, the owner or operator must initiate procedures to determine the cause of every alarm within 8 hours of the alarm.  The owner or operator must alleviate the cause of the alarm within 24 hours of the alarm by taking whatever corrective action(s) are necessary.  Corrective actions may include, but are not limited to the following:
      (i) Inspecting the fabric filter for air leaks, torn or broken bags or filter media, or any other condition that may cause an increase in PM emissions;
      (ii) Sealing off defective bags or filter media;
      (iii) Replacing defective bags or filter media or otherwise repairing the control device;
      (iv) Sealing off a defective fabric filter compartment;
      (v) Cleaning the bag leak detection system probe or otherwise repairing the bag leak detection system; or
      (vi) Shutting down the process producing the PM emissions.
      (n) Alternate Monitoring Requirements Approval.  An owner or operator may submit an application to the Administrator for approval of alternate monitoring requirements to demonstrate compliance with the emission standards of this subpart, except for emission standards for THC, subject to the provisions of paragraphs (n)(1) through (n)(6) of this section.
      (1) The Administrator will not approve averaging periods other than those specified in this section, unless the owner or operator documents, using data or information, that the longer averaging period will ensure that emissions do not exceed levels achieved during the performance test over any increment of time equivalent to the time required to conduct three runs of the performance test.
      (2) If the application to use an alternate monitoring requirement is approved, the owner or operator must continue to use the original monitoring requirement until approval is received to use another monitoring requirement.
      (3) The owner or operator shall submit the application for approval of alternate monitoring requirements no later than the notification of performance test. The application must contain the information specified in paragraphs (m)(3)(i) through (iii) of this section:
      (i) Data or information justifying the request, such as the technical or economic infeasibility, or the impracticality of using the required approach;
      (ii) A description of the proposed alternative monitoring requirement, including the operating parameter to be monitored, the monitoring approach and technique, the averaging period for the limit, and how the limit is to be calculated; and
      (iii) Data or information documenting that the alternative monitoring requirement would provide equivalent or better assurance of compliance with the relevant emission standard.
      (4) The Administrator will notify the owner or operator of the approval or denial of the application within 90 calendar days after receipt of the original request, or within 60 calendar days of the receipt of any supplementary information, whichever is later. The Administrator will not approve an alternate monitoring application unless it would provide equivalent or better assurance of compliance with the relevant emission standard. Before disapproving any alternate monitoring application, the Administrator will provide:
      (i) Notice of the information and findings upon which the intended disapproval is based; and
      (ii) Notice of opportunity for the owner or operator to present additional supporting information before final action is taken on the application. This notice will specify how much additional time is allowed for the owner or operator to provide additional supporting information.
      (5) The owner or operator is responsible for submitting any supporting information in a timely manner to enable the Administrator to consider the application prior to the performance test. Neither submittal of an application, nor the Administrator's failure to approve or disapprove the application relieves the owner or operator of the responsibility to comply with any provision of this subpart.
      (6) The Administrator may decide at any time, on a case-by-case basis that additional or alternative operating limits, or alternative approaches to establishing operating limits, are necessary to demonstrate compliance with the emission standards of this subpart.
      (o) Development and Submittal (Upon Request) of Monitoring Plans. If you demonstrate compliance with any applicable emission limit through performance stack testing or other emissions monitoring, you must develop a site-specific monitoring plan according to the requirements in paragraphs (o)(1) through (4) of this section. This requirement also applies to you if you petition the EPA Administrator for alternative monitoring parameters under paragraph (n) of this section and §63.8(f). If you use a BLDS, you must also meet the requirements specified in paragraph (n)(5) of this section.
      (1) For each continuous monitoring system (CMS) required in this section, you must develop, and submit to the permitting authority for approval upon request, a site-specific monitoring plan that addresses paragraphs (o)(1)(i) through (iii) of this section. You must submit this site-specific monitoring plan, if requested, at least 60 days before your initial performance evaluation of your CMS.
      (i) Installation of the CMS sampling probe or other interface at a measurement location relative to each affected process unit such that the measurement is representative of control of the exhaust emissions (e.g., on or downstream of the last control device);
      (ii) Performance and equipment specifications for the sample interface, the pollutant concentration or parametric signal analyzer, and the data collection and reduction systems; and
      (iii) Performance evaluation procedures and acceptance criteria (e.g., calibrations).
      (2) In your site-specific monitoring plan, you must also address paragraphs (o)(2)(i) through (iii) of this section.
      (i) Ongoing operation and maintenance procedures in accordance with the general requirements of §63.8(c)(1), (c)(3), and (c)(4)(ii);
      (ii) Ongoing data quality assurance procedures in accordance with the general requirements of §63.8(d); and
      (iii) Ongoing recordkeeping and reporting procedures in accordance with the general requirements of §63.10(c), (e)(1), and (e)(2)(i).
      (3) You must conduct a performance evaluation of each CMS in accordance with your site-specific monitoring plan.
      (4) You must operate and maintain the CMS in continuous operation according to the site-specific monitoring plan.
      (5) BLDS Monitoring Plan.  Each monitoring plan must describe the items in paragraphs (o)(5)(i) through (v) of this section.  At a minimum the owner or operator must retain records related to the site-specific monitoring plan and information discussed in paragraphs (m)(1) through (4), (m)(10) and (m)(11) of this section for a period of 5 years, with at least the first 2 years on-site;
      (i) Installation of the BLDS;

      (ii) Initial and periodic adjustment of the BLDS, including how the alarm set-point will be established;

      (iii) Operation of the BLDS, including quality assurance procedures;

      (iv) How the BLDS will be maintained, including a routine maintenance schedule and spare parts inventory list;

      (v) How the BLDS output will be recorded and stored.
 19.  Section 63.1351 is amended to read as follows:
§63.1351  Compliance dates.
      (a) Except as noted in paragraph (b) below, the compliance date for an owner or operator of an existing affected source subject to the provisions of this subpart is June 14, 2002.
      (b)  The compliance date for existing sources with the PM, mercury, THC, and HCl emissions limits which became effective in [INSERT DATE 60 DAYS AFTER OF PUBLICATION OF THESE AMENDMENTS IN THE FERERAL REGISTER] will be [INSERT DATE THREE YEARS FROM THE DATE OF PUBLICATION OF THESE AMENDMENTS IN THE FEDERAL REGISTER].
      (c) Except as noted in paragraph (d) below, the compliance date for an owner or operator of an affected source subject to the provisions of this subpart that commences new construction or reconstruction after March 24, 1998, is June 14, 1999, or upon startup of operations, whichever is later.
      (d)  The compliance date for new sources will be [INSERT DATE 60 DAYS AFTER PUBLICATION OF THESE AMENDMENTS IN THE FERERAL REGISTER] or startup, whichever is later.
      20.  Section 63.1352 is amended to read:
      § 63.1352   Additional test methods.
      (a) If you are conducting tests to determine the rates of emission of hydrogen chloride (HCl) from kilns and associated bypass stacks at portland cement manufacturing facilities, for use in applicability determinations under §63.1340 you may use Method 320 or Method 321 of appendix A of this part.
      (b) Owners or operators conducting tests to determine the rates of emission of specific organic HAP from raw material dryers, kilns and in-line kiln/raw mills at portland cement manufacturing facilities, solely for use in applicability determinations under §63.1340 of this subpart are permitted to use Method 320 of appendix A to this part, or Method 18 of appendix A to part 60 of this chapter.
	21.  Section 63.1354 is amended by adding paragraph (b)(9)(vi) to read as follows:
§63.1354  Reporting requirements.
*  *  *  *  *
	(b )(9) * * *
	(vi)	 Monthly rolling average mercury, THC, PM, and HCl (if applicable) emissions levels in the units of the applicable emissions limit for each kiln, clinker cooler, and raw material dryer.
*  *  *  *  *
      22.  Section 63.1355 is amended by revising paragraph (e) to read as follows:
§63.1355  Recordkeeping requirements.
*  *  *  *  *
	(e)  You must keep records of the daily clinker production rates and kiln feed rates for area sources.
*  *  *  *  *
	23.  Section 63.1356 is revised to read as follows:
§63.1356  Sources with multiple emission limits or monitoring requirements.
      If an affected facility subject to this subpart has a different emission limit or requirement for the same pollutant under another regulation in title 40 of this chapter, the owner or operator of the affected facility must comply with the most stringent emission limit or requirement and is exempt from the less stringent requirement.
	24.  Table 2 to Subpart LLL of Part 63 is revised to read as follows:
Table 2 to Subpart LLL of Part 63 -- Applicability of General Provisions
                                   Citation
                                  Requirement
                            Applies to Subpart LLL

                                  Explanation
63.1(a)(1) - (4)
Applicability
Yes

63.1(a)(5)

No
[Reserved]
63.1(a)(6) - (8)
Applicability
Yes

63.1(a)(9)

No
[Reserved]
63.1(a)(10) - (14)
Applicability
Yes

63.1(b)(1)
Initial Applicability Determination
No
§63.1340 specifies applicability.
63.1(b)(2) - (3)
Initial Applicability Determination
Yes

63.1(c)(1)
Applicability After Standard Established
Yes

63.1(c)(2)
Permit Requirements
Yes
Area sources must obtain Title V permits.
63.1(c)(3)

No
[Reserved]
63.1(c)(4) - (5)
Extensions, Notifications
Yes

63.1(d)

No
[Reserved]
63.1(e)
Applicability of Permit Program
Yes

63.2
Definitions
Yes
Additional definitions in §63.1341.
63.3(a) - (c)
Units and Abbreviations
Yes

63.4(a)(1) - (3)
Prohibited Activities
Yes

63.4(a)(4)

No
[Reserved]
63.4(a)(5)
Compliance date
Yes

63.4(b) - (c)
Circumvention, Severability
Yes

63.5(a)(1) - (2)
Construction/Reconstruction
Yes

63.5(b)(1)
Compliance Dates
Yes

63.5(b)(2)

No
[Reserved]
63.5(b)(3) - (6)
Construction Approval, Applicability
Yes

63.5(c)

No
[Reserved]
63.5(d)(1) - (4)
Approval of Construction/Reconstruction
Yes

63.5(e)
Approval of Construction/Reconstruction
Yes

63.5(f)(1) - (2)
Approval of Construction/Reconstruction
Yes

63.6(a)
Compliance for Standards and Maintenance
Yes

63.6(b)(1) - (5)
Compliance Dates
Yes

63.6(b)(6)

No
[Reserved]
63.6(b)(7)
Compliance Dates
Yes

63.6(c)(1) - (2)
Compliance Dates
Yes

63.6(c)(3) - (4)

No
[Reserved]
63.6(c)(5)
Compliance Dates
Yes

63.6(d)

No
[Reserved]
63.6(e)(1) - (2)
Operation & Maintenance
Yes

63.6(e)(3)
Startup, Shutdown Malfunction Plan
Yes

63.6(f)(1)
Compliance with Emission Standards
No

63.6(f)(2) - (3)
Compliance with Emission Standards
Yes

63.6(g)(1) - (3)
Alternative Standard
Yes

63.6(h)(1)
Opacity/VE Standards
No

63.6(h)(2)
Opacity/VE Standards
Yes

63.6(h)(3)

No
[Reserved]
63.6(h)(4) - (h)(5)(i)
Opacity/VE Standards
Yes

63.6(h)(5)(ii) - (iv)
Opacity/VE Standards
No
Test duration specified in subpart LLL.
63.6(h)(6)
Opacity/VE Standards
Yes

63.6(h)(7)
Opacity/VE Standards
Yes

63.6(i)(1) - (14)
Extension of Compliance
Yes

63.6(i)(15)

No
[Reserved]
63.6(i)(16)
Extension of Compliance
Yes

63.6(j)
Exemption from Compliance
Yes

63.7(a)(1) - (3)
Performance Testing Requirements
Yes
§63.1349 has specific requirements.
63.7(b)
Notification
Yes

63.7(c)
Quality Assurance/Test Plan
Yes

63.7(d)
Testing Facilities
Yes

63.7(e)(1) - (4)
Conduct of Tests
Yes

63.7(f)
Alternative Test Method
Yes

63.7(g)
Data Analysis
Yes

63.7(h)
Waiver of Tests
Yes

63.8(a)(1)
Monitoring Requirements
Yes

63.8(a)(2)
Monitoring
No
§63.1350 includes CEMS requirements.
63.8(a)(3)

No
[Reserved]
63.8(a)(4)
Monitoring
No
Flares not applicable.
63.8(b)(1) - (3)
Conduct of Monitoring
Yes

63.8(c)(1) - (8)
CMS Operation/Maintenance
Yes
Temperature and activated carbon injection monitoring data reduction requirements given in subpart LLL.
63.8(d)
Quality Control
Yes

63.8(e)
Performance Evaluation for CMS
Yes

63.8(f)(1) - (5)
Alternative Monitoring Method
Yes
Additional requirements in §63.1350(l).
63.8(f)(6)
Alternative to RATA Test
Yes

63.8(g)
Data Reduction
Yes

63.9(a)
Notification Requirements
Yes

63.9(b)(1) - (5)
Initial Notifications
Yes

63.9(c)
Request for Compliance Extension
Yes

63.9(d)
New Source Notification for Special Compliance Requirements
Yes

63.9(e)
Notification of Performance Test
Yes

63.9(f)
Notification of VE/Opacity Test
Yes
Notification not required for VE/opacity test under §63.1350(e) and (j).
63.9(g)
Additional CMS Notifications
Yes

63.9(h)(1) - (3)
Notification of Compliance Status
Yes

63.9(h)(4)

No
[Reserved]
63.9(h)(5) - (6)
Notification of Compliance Status
Yes

63.9(i)
Adjustment of Deadlines
Yes

63.9(j)
Change in Previous Information
Yes

63.10(a)
Recordkeeping/Reporting
Yes

63.10(b)
General Requirements
Yes

63.10(c)(1)
Additional CMS Recordkeeping
Yes
PS - 8A supersedes requirements for THC CEMS.
63.10(c)(2) - (4)

No
[Reserved]
63.10(c)(5) - (8)
Additional CMS Recordkeeping
Yes
PS - 8A supersedes requirements for THC CEMS.
63.10(c)(9)

No
[Reserved]
63.10(c)(10) - (15)
Additional CMS Recordkeeping
Yes
PS - 8A supersedes requirements for THC CEMS.
63.10(d)(1)
General Reporting Requirements
Yes

63.10(d)(2)
Performance Test Results
Yes

63.10(d)(3)
Opacity or VE Observations
Yes

63.10(d)(4)
Progress Reports
Yes

63.10(d)(5)
Startup, Shutdown, Malfunction Reports
Yes

63.10(e)(1) - (2)
Additional CMS Reports
Yes

63.10(e)(3)
Excess Emissions and CMS Performance Reports
Yes
Exceedances are defined in subpart LLL.
63.10(f)
Waiver for Recordkeeping/Reporting
Yes

63.11(a) - (b)
Control Device Requirements
No
Flares not applicable.
63.12(a) - (c)
State Authority and Delegations
Yes

63.13(a) - (c)
State/Regional Addresses
Yes

63.14(a) - (b)
Incorporation by Reference
Yes

63.15(a) - (b)
Availability of Information
Yes

Appendix to Part 63  -  [AMENDED]
      17.   Section 1.3.2 of Method 321 of Appendix A to Part 63  -  Test Methods is revised to read as follows:
      Appendix A to Part 63  -  Test Methods
   * * * * *
   Test Method 321  -  Measurement of Gaseous Hydrogen Chloride Emissions At Portland Cement Kilns by Fourier Transform Infrared (FTIR) Spectroscopy
   *    *   * *  *

1.3.2  The practical lower quantification range is usually higher than that indicated by the instrument performance in the laboratory, and is dependent upon (1) the presence of interfering species in the exhaust gas (notably H2O), (2) the optical alignment of the gas cell and transfer optics, and (3) the quality of the reflective surfaces in the cell (cell throughput).  Under typical test conditions (moisture content of up to 30 percent, 10 meter absorption pathlength, liquid nitrogen-cooled IR detector, 0.5 cm[-1] resolution, and an interferometer sampling time of 60 seconds) a typical lower quantification range for HCl is 0.1 to 1.0 ppm.
*  *  *  *  *