Amendments to Standards of Performance for New Stationary Sources; Monitoring Requirements

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 60

[AD-FRL-6163-8]

RIN 2060-A622

Amendments to Standards of Performance for New Stationary

Sources; Monitoring Requirements

AGENCY: Environmental Protection Agency (EPA).

ACTION: Supplemental proposal.

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SUMMARY: Today's action proposes to incorporate by reference into

Performance Specification 1 (PS-1): Specifications and Test Procedures

for

[[Page 50825]]

Opacity Continuous Emission Monitoring Systems in Stationary Sources

(40 CFR part 60, Appendix B) the standard practice developed by

American Society for Testing and Materials (ASTM) entitled ``Standard

Practice for Continuous Opacity Monitoring Manufacturers to Certify

Design Conformance and Monitor Calibration,'' Document number D6216.

This proposal is a supplement to actions published in the Federal

Register on November 25, 1994 (59 FR 60585). ASTM D6216 helps to ensure

that continuous opacity monitoring systems (COMS) meet the most current

minimum design and calibration requirements. This proposal also

contains revision to Subpart A, Secs. 60.13 and 60.17, as well as

editorial corrections to PS-1 other than the incorporations by

reference.

DATES: Comments. Comments must be received on or before November 23,

1998.

Public Hearing. If anyone contacts EPA requesting to speak at a

public hearing by October 14, 1998, a public hearing will be held on

October 23, 1998 beginning at 10 a.m. Persons interested in attending

the hearing should call the contact person mentioned under ADDRESSES to

verify that a hearing will be held.

Request to Speak at Hearing. Persons wishing to present oral

testimony at the public hearing must contact EPA by October 6, 1998.

ADDRESSES: Comments. Comments should be submitted (in duplicate if

possible) to: Air Docket Section (LE-131), Attention: Docket No. A-91-

07, U.S. Environmental Protection Agency, 401 M Street, SW.,

Washington, DC 20460.

Public Hearing. If anyone contacts EPA requesting a public hearing,

it will be held at EPA's Emission Measurement Center, Research Triangle

Park, North Carolina. Persons interested in attending the hearing or

wishing to present oral testimony should contact Mr. Solomon O. Ricks,

Emission Measurement Center (MD-19), Emissions, Monitoring, and

Analysis Division, U.S. Environmental Protection Agency, Research

Triangle Park, North Carolina, 27711, telephone number (919) 541-5242.

Background Information. The background information for this

proposal may be obtained from: Air Docket Section (MC-6102), Attention:

Docket No. A-91-07, U.S. Environmental Protection Agency, Room M-1500,

First Floor, Waterside Mall, 401 M Street, SW., Washington, DC 20460.

The background information contains correspondence between EPA and ASTM

during the development of the ASTM standard practice.

Docket. A docket, No. A-91-07, containing information relevant to

this rulemaking, is available for public inspection between 8:30 a.m.

and noon and 1:30 p.m. and 3:30 p.m., Monday through Friday, at EPA's

Air Docket Section, Room M-1500, First Floor, Waterside Mall, 401 M

Street, SW., Washington, DC 20460. A reasonable fee may be charged for

copying. A copy of the ASTM D6216 standard practice is included in the

docket.

FOR FURTHER INFORMATION CONTACT:

For information concerning the standard, contact Mr. Solomon Ricks at

(919) 541-5242, Source Characterization Group A, Emissions, Monitoring,

and Analysis Division (MD-19), U.S. Environmental Protection Agency,

Research Triangle Park, North Carolina 27711.

SUPPLEMENTARY INFORMATION: The following outline is provided to aid in

reading the preamble to the supplemental proposal:

I. Introduction

II. Summary of Changes

A. Design Specifications Verification Procedures

B. Performance Specifications Verification Procedures

C. Other Revisions

III. Administrative Requirements

A. Docket

B. Executive Order 12866

C. Regulatory Flexibility Act

D. Paperwork Reduction Act

E. Unfunded Mandates Act

F. Executive Order 12875

G. National Technology Transfer and Advancement Act

H. Executive Order 13045

I. Executive Order 13084

I. Introduction

PS-1, Specifications and Test Procedures for Opacity Continuous

Emission Monitoring Systems in Stationary Sources (40 CFR Part 60,

Appendix B) was first published in the Federal Register on October 6,

1975 (40 FR 64250). An amendment to PS-1 was published on March 30,

1983 (48 FR 13322).

Additional experience with the procedures of PS-1 led EPA to

propose a second set of revisions proposed in the Federal Register (59

FR 60585) on November 25, 1994. These revisions were intended to (1)

clarify owner and operator and monitor vendor obligations, (2) reaffirm

and update COMS design and performance requirements, and (3) provide

EPA and affected facilities with equipment assurances for carrying out

effective monitoring. Today's proposal supplements the November 25,

1994 proposal and will further contribute to the goal of updating COMS

design and performance requirements.

These revisions to subpart A and PS-1 will apply to all COMS

installed or replaced after the date of promulgation for purposes of

monitoring opacity, as required in the Code of Federal Regulations

(CFR). These requirements may also apply to stationary sources located

in a State, District, Reservation, or Territory that have adopted these

requirements into their implementation plan. Following promulgation, a

source owner, operator, or manufacturer will be subject to these

requirements if installing a new COMS, relocating a COMS, replacing a

COMS, recertifying a COMS that has undergone substantial refurbishing

(in the opinion of the enforcing agency), or has been specifically

required to recertify the COMS with these revisions.

II. Summary of Changes

Section 12 of the National Technology Transfer and Advancement Act

of 1995 (NTTAA) aims to reduce costs to the private and public sectors

by requiring federal agencies to draw upon any existing, suitable

technical standards used in commerce or industry. To comply with NTTAA,

which went into effect in March 1996, EPA must consider and use

voluntary consensus standards (VCS's), if available and applicable,

unless such use is inconsistent with law or otherwise impractical.

In compliance with NTTAA, this proposal incorporates by reference

ASTM standard D6216. The ASTM D6216 will be referenced in 40 CFR part

60, Sec. 60.17. The development of D6216 was undertaken as a result of

discussions between representatives of ASTM and EPA during September

1996. The ASTM agreed to develop D6216 to assist EPA in overcoming

technical issues with opacity monitors. The additional design and

performance specifications and test procedures included in D6216

eliminate many of the performance problems that EPA encountered and

contribute to ensuring the quality of opacity monitoring results

without restricting future technological development. ASTM believes

that purchasers of opacity monitoring equipment meeting all of the

requirements of D6216 are assured that the opacity monitoring equipment

meets all of the design requirements of PS-1 and additional design

specifications that eliminate many of the operational problems that

were encountered in the field. The standard will be incorporated as

presented in the following sections A and B.

[[Page 50826]]

A. Design Specifications Verification Procedures

This proposal incorporates the design specification verification

procedures from ASTM standard D6216 in their entirety. Included in ASTM

D6216 are three new design specification verification procedures that

will ensure the accuracy of opacity monitor data is not affected by

fluctuations in supply voltage, ambient temperature, and ambient light.

Therefore, EPA is proposing the addition of verification procedures

for: (a) Insensitivity to supply voltage variations, (b) thermal

stability, and (c) insensitivity to ambient light.

The proposed revisions would move the simulated zero and upscale

calibration requirements from section 7 (Performance Specifications

Verification Procedures) in November 25, 1994 proposal to section 6

(Design Specification Verification Procedures). ASTM standard D6216

provides procedures for calibration check devices, as well as automated

mechanisms to determine simulated zero and upscale calibration drift.

The Agency is requesting comments on these proposed revisions, and in

particular on the use of ASTM standard D6216.

B. Performance Specifications Verification Procedures

In a reversal from the November 25, 1994 proposed revisions to PS-1

which placed the responsibility of some tests on the owner and

operator, this proposal places the responsibility of performing the:

(a) Calibration error test, (b) instrument response time test, and (c)

optical alignment indicator test, on the manufacturer. Under this

proposal, these tests and the equipment preparation would be performed

prior to shipping the COMS to the owner or operator. ASTM explained to

the EPA that the manufacturers would be conducting these tests on each

monitor and also that the manufacturers were more adequately equipped

with test stands for doing these tests than the owner and operator at

the facility.

This proposal also incorporates by reference the procedures for

these tests from ASTM standard D6216. The Agency requests comments on

these proposed revisions, and in particular on the use of ASTM standard

D6216.

C. Other Revisions

This proposal also contains some revisions to 40 CFR part 60,

Sec. 60.13(d)(1) and several revisions or corrections to PS-1. Those

revisions and corrections are summarized below. The Agency requests

comments on these proposed changes.

We propose the following two revisions to Sec. 60.13(d)(1):

(1) Change the zero and span calibration levels to be based on

the applicable opacity standard; therefore, proper operation of the

monitor near the emission standard can be confirmed on a daily

basis, and

(2) Revise the statement about calibration materials as defined

in the applicable version of PS-1; EPA's intent is to have only one

version of PS-1.

The Agency proposes the following revisions for section 2,

Definitions, of PS-1:

(1) Replace section 2.3 Calibration Drift with Upscale

Calibration Drift and being moved to section 2.23. This change

causes the remaining definition subsection numbers to change.

(2) Modify several definitions to be consistent with ASTM D6216.

(3) Add definitions for the following three procedures to be

consistent with ASTM D6216: External Adjustment, Intrinsic

Adjustment, and Zero Compensation.

We propose the following modifications and corrections to section

4, Installation Specifications, of PS-1:

(1) Since a new design performance specification now requires

that the opacity monitor exhibit no interference from ambient light,

modify section 4.1 by removing 4.1(d).

(2) Reorganize section 4 because sections 4.1 and 4.2 were both

titled Measurement Location.

We propose the following revisions to section 5, Design

Specifications, of PS-1:

(1) Add design specifications criteria for,

(a) insensitivity to supply voltage variation,

(b) thermal stability, and

(c) insensitivity to ambient light.

(2) Revise the requirement to display and record changes to the

pathlength correction factor (PLCF) such that the PLCF must not be

changeable and an alarm must activate when the PLCF is changed.

(3) Update table 1-1 to reflect the revised and added design

specifications.

We also propose to revise section 7 as follows:

(1) Revise table 1-3 in section 7 so that the opacity values

used for the calibration error test ensure the accuracy of the

opacity monitor near the opacity standard. The November 25, 1994

proposed revisions did not check the accuracy of the COMS at or near

the applicable standard.

(2) Revise section 7.1.3.1.3 to reduce the calibration frequency

of primary attenuators used for calibration of secondary

attenuators. ASTM assured EPA that when primary attenuators are used

only to calibrate secondary attenuators, and they are stored in a

protective case, scratching or other degradation of their surface is

virtually eliminated.

(3) Revise section 7.1.3.2 to reduce the calibration frequency

of secondary attenuators. ASTM explained to EPA that unless a

secondary filter was severely damaged, the calibration would not

change over a six-month period.

(4) Revise section 7.3, operational test period, to clarify the

sources operating status during the 336-hour test period. During the

operational test period, the source should operate in its normal

operating mode. Therefore, if normal operations contain routine

source shutdowns, the source's down periods are included in the 336-

hour operational test period. Also, the interval between when

external zero and calibration adjustments can be made has been

extended from 24 hours to 168 hours.

III. Administrative Requirements

A. Docket

The docket is an organized and complete file of all information

submitted or otherwise considered by EPA in the development of this

proposed rulemaking. The principal purposes of the docket are: (1) to

allow interested parties to identify and locate documents so that they

can effectively participate in the rulemaking process, and (2) to serve

as the record in case of judicial review (except for interagency review

materials) [Clean Air Act Section 307(d)(7)(A)].

B. Executive Order 12866

Under Executive Order 12866 (58 FR 51735 October 4, 1993), the EPA

is required to judge whether a regulatory action is ``significant'' and

therefore subject to Office of Management and Budget (OMB) review and

the requirements of this Executive Order. The Order defines

``significant regulatory action'' as one that is likely to result in a

rule that may: (1) Have an annual effect on the economy of $100 million

or more, or adversely affect in a material way the economy, a sector of

the economy, productivity, competition, jobs, the environment, public

health or safety, or State, local, or tribal governments or

communities; (2) create a serious inconsistency or otherwise interfere

with an action taken or planned by another agency; (3) materially alter

the budgetary impact of entitlements, grants, user fees, or loan

programs, or the rights and obligation of recipients thereof; or (4)

raise novel legal or policy issues arising out of legal mandates, the

President's priorities, or the principles set forth in the Executive

Order.

Pursuant to the terms of Executive Order 12866, it has been

determined that this rule is not ``significant'' because none of the

listed criteria apply to this action. Consequently, this action was not

submitted to OMB for review under Executive Order 12866.

[[Page 50827]]

C. Regulatory Flexibility Act

The Regulatory Flexibility Act (RFA) generally requires an agency

to conduct a regulatory flexibility analysis of any rule subject to

notice and comment rulemaking requirements unless the agency certifies

that the rule will not have a significant economic impact on a

substantial number of small entities. Small entities include small

businesses, small not-for-profit enterprises, and small governmental

jurisdictions. This proposed rule would not have a significant impact

on a substantial number of small entities because no additional cost

will be incurred by such entities because of the changes specified by

the rule. The requirements of the proposal reaffirm the existing

requirements for demonstrating conformance with the COMS PS's. Small

entities will be affected to the same degree that they are affected

under existing requirements. Therefore, I certify that this action will

not have a significant economic impact on a substantial number of small

entities.

D. Paperwork Reduction Act

This proposed rule does not contain any information collection

requirements subject to the Office of Management and Budget review

under the Paperwork Reduction Act of 1980, 44 U.S.C. 3501 et seq.

E. Unfunded Mandates Act

Under Section 202 of the Unfunded Mandates Reform Act of 1995

(``Unfunded Mandates Act''), the EPA must prepare a budgetary impact

statement to accompany any proposed rule, or any final rule for which a

notice of proposed rulemaking was published, that includes a Federal

mandate that may result in estimated costs to State, local, or tribal

governments in the aggregate, or to the private sector, of $100 million

or more in any one year. Under Section 205, if a budgetary impact

statement is required under section 202, the EPA must select the least

costly, most cost-effective, or least burdensome alternative that

achieves the objective of the rule, unless the Agency explains why this

alternative is not selected or the selection of this alternative is

inconsistent with law. Section 203 requires the EPA to establish a plan

for informing and advising any small governments that may be

significantly or uniquely impacted by the rule. Section 204 requires

the Agency to develop a process to allow elected state, local, and

tribal government officials to provide input in the development of any

proposal containing a significant Federal intergovernmental mandate.

The EPA has determined that this proposed rule does not include a

Federal mandate that may result in estimated costs of $100 million or

more to either State, local, or tribal governments in the aggregate, or

to the private sector. The EPA has also determined that this proposed

rule does not significantly or uniquely impact small governments.

Therefore, the requirements of the Unfunded Mandates Act do not apply

to this action.

F. Executive Order 12875

Executive Order 12875 applies to the promulgation of any regulation

that is not required by statute and that creates a mandate upon a

State, local, or tribal government. Today's action does not impose any

unfunded mandate upon any State, local, or tribal government;

therefore, Executive Order 12875 does not apply to this rulemaking.

G. National Technology Transfer and Advancement Act

The National Technology Transfer and Advancement Act of 1995

(NTTAA), section 12(d), Pub. L. 104-113, generally requires federal

agencies and departments to use technical standards that are developed

or adopted by voluntary consensus standards bodies, using such

technical standards as a means to carry out policy objectives or

activities determined by the agencies and departments. If use of such

technical standards is inconsistent with applicable law or otherwise

impractical, a federal agency or department may elect to use technical

standards that are not developed or adopted by voluntary consensus

standards bodies if the head of the agency or department transmits to

the Office of Management and Budget an explanation of the reasons for

using such standards.

To comply with NTTA, which went into effect in March 1996, EPA must

consider and use voluntary consensus standards (VCS's) if available and

applicable. Today's action proposes to incorporate a VCS developed and

adopted by ASTM, standard D6216. ASTM agreed to develop D6216 to assist

EPA in overcoming technical issues with opacity monitors.

H. Executive Order 13045

Executive Order 13045 applies to any rule that EPA determines (1)

is ``economically significant'' as defined under Executive Order 12866,

and (2) addresses an environmental health or safety risk that has a

disproportionate effect on children. If the regulatory action meets

both criteria, the Agency must evaluate the environmental health or

safety effects of the planned rule on children, and explain why the

planned regulation is preferable to other potentially effective and

reasonably feasible alternatives considered by the Agency. This

proposed rule is not subject to Executive Order 13045 because this is

not an economically significant regulatory action as defined by E.O.

12866.

I. Executive Order 13084

Under Executive Order 13084, EPA may not issue a regulation that is

not required by statute, that significantly or uniquely affects the

communities of Indian tribal governments, and that imposes substantial

direct compliance costs on those communities, unless the Federal

government provides the funds necessary to pay the direct compliance

costs incurred by the tribal governments. If the mandate is unfunded,

EPA must provide to the Office of Management and Budget, in a

separately identified section of the preamble to the rule, a

description of the extent of EPA's proper consultation with

representatives of affected tribal governments, a summary of the nature

of their concerns, and a statement supporting the need to issue the

regulation. In addition, Executive Order 13084 requires EPA to develop

an effective process permitting elected and other representatives of

Indian tribal governments ``to provide meaningful and timely input in

the development of regulatory policies on matters that significantly or

uniquely affect their communities.'' Today's rule does not

significantly or uniquely affect the communities of Indian tribal

governments. Accordingly, the requirements of section 3(b) of Executive

Order 13084 do not apply to this rule.

List of Subjects in 40 CFR Part 60

Environmental protection, Air pollution control, Continuous

emission monitoring, Opacity, Particulate matter, Performance

specification, Preparation, Transmissometer.

Dated: September 15, 1998.

Carol M. Browner,

Administrator.

BILLING CODE 6560-50-M

The EPA proposes that 40 CFR part 60 be amended as follows:

1. The authority citation for part 60 continues to read as follows:

Authority: 42 U.S.C. 7401, 7411, 7413, 7414, 7416, 7601, and

7602.

2. Section 60.13 is amended by revising paragraph (d)(1) as

follows:

[[Page 50828]]

Sec. 60.13 Monitoring requirements.

* * * * *

(d)(1) Owners and operators of continuous emission monitoring

systems (CEMS's) installed in accordance with the provisions of this

part, shall automatically check the zero (or low level value between 0

and 20 percent of span value) and span (50 to 100 percent of span

value) calibration drifts (CD's) at least once daily. For CEMS's used

to measure opacity in accordance with the provisions of this part,

owners and operators shall automatically, intrinsic to the continuous

opacity monitoring system (COMS), check the zero and upscale

calibration drifts at least once daily. For a COMS, the acceptable

range of zero and upscale calibration values shall be as defined in PS-

1 in appendix B of this part. Where an opacity standard of 10 percent

or less, corrected to stack exit conditions, has been specified, a

surrogate 10 percent opacity standard shall be used for determining the

daily calibration values for the drift assessments required above. The

zero and upscale value shall, as a minimum, be adjusted whenever either

the 24-hour zero drift or the 24-hour span drift exceeds two times the

limit of the applicable PS in appendix B of this part. The system must

allow the amount of the excess zero and span drift to be recorded and

quantified whenever specified. For COMS's, the optical surfaces,

exposed to the effluent gases, shall be cleaned prior to performing the

zero and span drift adjustments, except for systems using automatic

zero adjustments. The optical surfaces shall be cleaned when the

cumulative automatic zero compensation exceeds 4 percent opacity.

* * * * *

3. Section 60.17 is amended by adding (a)(64) as follows:

Sec. 60.17 Incorporation by reference.

* * * * *

(a) * * *

(64) ASTM D6216-97 Standard Practice for Continuous Opacity

Monitoring Manufacturers to Certify Design Conformance and Monitor

Calibration, IBR approved ____________ (date of publication of final

rule in the Federal Register) for appendix B, PS-1.

* * * * *

3. Appendix B, Part 60, Performance Specification 1 is amended by

revising sections 1. introductory text, 1.1, 1.1.2, 1.1.3, 2, 3

introductory text, 3.1 introductory text, 4, 5 introductory text,

5.1.2, 5.1.3, 5.1.4, 5.1.5, 5.1.6, 5.1.7, 5.1.8, 5.1.9, 5.1.10, 5.1.11,

5.1.12, 5.1.13, 6.7 introductory text, 7.1, 7.1.1, 7.1.2, 7.1.3

introductory text, 7.1.3.1.3, 7.1.3.2, 7.1.4, 7.1.5, 7.1.6, 7.2

introductory text, 7.3, 7.3.1, 7.3.2, 7.3.3, 7.3.4 introductory text, 9

introductory text, 9.1 introductory text, 9.1.b., h. k & l, 9.2

introductory text, 9.2g, h., i, j, k, l, m, & n, 9.3 introductory text,

9.3a, c, e, & f, 9.4, 9.5, 9.5.1 introductory text, 9.5.1 (4), (5),

(6), (7), 9.6, 10.6 & 10.7 to read as follows:

APPENDIX B--PERFORMANCE SPECIFICATIONS

* * * * *

PERFORMANCE SPECIFICATION 1--Specifications and Test Procedures

for Continuous Opacity Monitoring Systems in Stationary Sources

1. Applicability and Principle.

1.1 Applicability.

* * * * *

1.1.2 Performance Specification 1 (PS-1) applies to COMS's

installed on or after ____________ (30 days after the date of

publication of the final rule in the Federal Register).

1.1.3 A COMS installed before __________ (30 days after the

date of publication of the final rule in the Federal Register) need

not be re-tested to demonstrate compliance with these PS's unless

specifically required by regulatory action other than the

promulgation of PS-1. If a COMS installed prior to ____________ (30

days after the date of publication of the final rule in the Federal

Register) is replaced or relocated, this PS-1 shall apply to the

COMS replacement or as relocated.

* * * * *

2. Definitions.

In addition to the definitions listed below, this specification

also includes the definitions found in ASTM standard D6216

(incorporated by reference--see 40 CFR 60.17)

2.1 Angle of Projection (AOP). The angle that contains all of

the radiation projected from the light source of the analyzer at a

level of greater than 2.5 percent of the peak illuminance.

2.2 Angle of View (AOV). The angle that contains all of the

radiation detected by the photodetector assembly of the analyzer at

a level greater than 2.5 percent of the peak detector response.

2.3 Calibration Error. The sum of the absolute value of the

mean difference and confidence coefficient for the opacity values

indicated by an opacity monitoring system as compared to the known

values of three calibration attenuators under clear path conditions

when the monitor is optically aligned.

2.4 Centroid Area. A concentric area that is geometrically

similar to the stack or duct cross-section and is no greater than 1

percent of the stack or duct cross-sectional area.

2.5 Continuous Opacity Monitoring System. The total equipment

required for continuous monitoring of effluent opacity, averaging of

emission measurement data, and permanently recording monitor

results. The system consists of the following major subsystems:

2.5.1 Opacity Monitor. The measurement instrument used for the

continuous determination of the opacity of the effluent released to

the atmosphere. An opacity monitor includes a transmissometer, a

means to correct opacity measurements to equivalent single pass

opacity values that would be observed at the emission outlet

pathlength, and all other interface and peripheral equipment

necessary for continuous operation.

2.5.2 Data Recorder. That portion of the installed COMS that

provides a permanent record of the opacity monitor output in terms

of opacity. The data recorder may include automatic data reduction

capabilities.

2.6 Dust Compensation. A method or procedure for systematically

adjusting the output of a transmissometer to account for reduction

in transmitted light reaching the detector (apparent increase in

opacity) that is specifically due to the accumulation of dust on the

exposed optical surfaces of the transmissometer.

2.7 External Adjustment. Either a manual, physical adjustment

made by the user (operator) to a component of the COMS that affects

the COMS's response or performance, or an adjustment applied by the

data acquisition system which is external to the opacity monitor.

2.8 External Audit Device. The inherent design, equipment, or

accommodation of the opacity monitor allowing the independent

assessment of the COMS's calibration and operation.

2.9 External Zeroing Device (Zero-Jig). An external, removable

device for simulating or checking the across stack zero of the COMS.

2.10 Full Scale. The maximum data display output of the COMS.

For purposes of recordkeeping and reporting, full scale shall be

greater than 80 percent opacity.

2.11 Intrinsic Adjustment. An automatic and essential feature

of an opacity monitor that provides for the internal control of

specific components or adjustment of the monitor response in a

manner consistent with the manufacturer's design of the instrument

and its intended operation.

2.12 Mean Spectral Response. The mean response wavelength of

the wavelength distribution for the effective spectral response

curve of the transmissometer.

2.13 Opacity. The fraction of incident light that is

attenuated, due to absorption, reflection, and scattering, by an

optical medium. Opacity (Op) and transmittance (Tr) are related by:

Op = 1-Tr.

2.14 Operational Test Period. A period of time (336 hours)

during which the COMS is expected to operate within the established

performance specifications without any unscheduled maintenance,

repair, or adjustment.

2.15 Optical Density. A logarithmic measure of the amount of

incident light attenuated. Optical Density (OD) is related to the

transmittance and opacity as follows: OD = -log10 (1-Op).

2.16 Pathlength. The depth of effluent in the light beam

between the receiver and the transmitter of a single-pass

transmissometer, or the depth of effluent between the transceiver

and reflector of a double-pass transmissometer. Three pathlengths

are referenced by this specification as follows:

[[Page 50829]]

2.16.1 Emission Outlet Pathlength. The pathlength (depth of

effluent) at the location where emissions are released to the

atmosphere. For circular stacks, the emission outlet pathlength is

the internal diameter at the stack exit. For noncircular outlets,

the emission outlet pathlength is the hydraulic diameter. For square

stacks: D = (2LW)/(L + W), where L is the length of the outlet and W

is the width of the outlet. Note that this definition does not apply

to positive pressure baghouse outlets with multiple stacks, side

discharge vents, ridge roof monitors, etc.

2.16.2 Installation Pathlength. The installation flange-to-

flange distance between the receiver and the transmitter of a

single-pass transmissometer or between the transceiver and reflector

of a double-pass transmissometer. The installation pathlength is to

be used for the optical alignment, response, and calibration error

tests of section 7.

2.16.3 Monitoring Pathlength. The effective depth of effluent

(the distance over which the light beam is actually evaluating the

stack effluent) measured by the COMS at the installation location.

Monitoring pathlength is to be used for calculation of the

pathlength correction factor (PLCF). The effective depth of effluent

measured by the COMS must be equal to or greater than 90 percent of

the distance between duct or stack walls.

2.17 Peak Spectral Response. The wavelength of maximum

sensitivity of the transmissometer.

2.18 Primary Attenuators. Primary attenuators are those

calibrated by the National Institute of Standards and Technology

(NIST).

2.19 Response Time. The amount of time it takes the COMS to

display on the data recorder 95 percent of a step change in opacity.

2.20 Secondary Attenuators. Secondary attenuators are those

calibrated against primary attenuators according to procedures in

section 7.1.3.

2.21 Transmissometer. An instrument used for the in-situ

measurement of light transmittance in a particulate-laden gas

stream. Single pass transmissometers consist of a light source and

detector components mounted on opposite ends of the measurement

path. Double pass instruments consist of a transceiver (including

both light source and detector components) and a reflector mounted

on opposite ends of the measurement path.

2.22 Transmittance. The fraction of incident light that is

transmitted through an optical medium.

2.23 Upscale Calibration Drift (CD). The difference in the COMS

output readings from the upscale calibration value after a stated

period of normal continuous operation during which no unscheduled

maintenance, repair, or adjustment took place.

2.24 Upscale Calibration Value. The opacity value at which a

calibration check of the COMS is performed by simulating an upscale

opacity condition as viewed by the detector. An opacity value

(corrected for pathlength) that is 150 to 190 percent of the

applicable opacity standard.

2.25 Zero Calibration Drift. The difference in the COMS output

readings from the zero calibration value after a stated period of

normal continuous operation during which no unscheduled maintenance,

repair, or adjustment had taken place.

2.26 Zero Calibration Value. A value at which a calibration

check of the COMS is performed by simulating a zero opacity

condition as viewed by the detector. An opacity value (corrected for

pathlength) that is 0 to 10 percent of the applicable opacity

standard.

2.27 Zero and Upscale Calibration Value Attenuator System. An

inherent system of the COMS that can be an automatic electro-

mechanical and filter system used for simulating both a zero and

upscale calibration value and providing an assessment and record on

the calibration of the instrument. Optical filters or screens with

neutral spectral characteristics, or other device that produces a

zero or an upscale calibration value shall be used.

2.28 Zero Compensation. An automatic adjustment of the

transmissometer to achieve the correct response to the zero

calibration value.

3. Apparatus.

3.1 Continuous Opacity Monitoring System. A COMS includes an

opacity monitor that meets the design and PS's of PS-1 and a

suitable data recorder, such as an analog strip chart recorder or

other suitable device (e.g., digital computer), with an input signal

range compatible with the analyzer output.

* * * * *

4. Installation Specifications.

Install the COMS at a location where the opacity measurements

are representative of the total emissions from the affected

facility. This requirement can be met as follows:

4.1 Measurement Location. Select a measurement location that is

(a) at least 4 duct diameters downstream from all partic-ulate

control equipment or flow disturbance, (b) at least 2 duct diameters

upstream of a flow disturbance, (c) where condensed water vapor is

not present, and (d) accessible in order to permit maintenance.

4.1.1 The primary concern in locating a COMS is determining a

location of well-mixed stack gas. Two factors contribute to complete

mixing of emission gases: turbulence and sufficient mixing time. The

criteria listed below define conditions under which well-mixed

emissions can be expected. Select a light beam path that passes

through the centroidal area of the stack or duct. Additional

requirements or modifications must be met for the following

locations:

4.1.1.1 If the location is in a straight vertical section of

stack or duct and is less than 4 equivalent diameters downstream

from a bend, use a light beam path that is in the plane defined by

the upstream bend (see figure 1-1).

4.1.1.2 If the location is in a straight vertical section of

stack or duct and is less than 4 equivalent stack or duct diameters

upstream from a bend, use a light beam path that is in the plane

defined by the downstream bend (see figure 1-2).

4.1.1.3 If the location is in a straight vertical section of

stack or duct and is less than 4 equivalent stack or duct diameters

downstream and is also less than 1 diameter upstream from a bend,

use a light beam path in the plane defined by the upstream bend (see

figure 1-3).

4.1.1.4 If the location is in a horizontal section of stack or

duct and is at least 4 equivalent stack or duct diameters downstream

from a vertical bend, use a light beam path in the horizontal plane

that is between \1/3\ and \1/2\ the distance up the vertical axis

from the bottom of the duct (see figure 1-4).

4.1.1.5 If the location is in a horizontal section of duct and

is less than 4 diameters downstream from a vertical bend, use a

light beam path in the horizontal plane that is between \1/2\ and

\2/3\ the distance up the vertical axis from the bottom of the duct

for upward flow in the vertical section, and is between \1/3\ and

\1/2\ the distance up the vertical axis from the bottom of the duct

for downward flow (figure 1-5).

4.2 Alternative Locations and Light Beam Paths. Locations and

light beam paths, other than those cited above, may be selected by

demonstrating, to the Administrator or delegated agent, that the

average opacity measured at the alternative location or path is

equivalent to the opacity as measured at a location meeting the

criteria of section 4.1. The opacity at the alternative location is

considered equivalent if the average opacity value measured at the

alternative location is within 10 percent of the average

opacity value measured at the location meeting the installation

criteria in section 4.1, and the difference between any two average

opacity values is less than 2 percent opacity (absolute). To conduct

this demonstration, simultaneously measure the opacities at the two

locations or paths for a minimum period of time (e.g., 180-minutes)

covering the range of normal operating conditions and compare the

results. The opacities of the two locations or paths may be measured

at different times, but must represent the same process operating

conditions. Alternative procedures for determining acceptable

locations may be used if approved by the Administrator.

4.3 Slotted Tube. For COMS that uses a slotted tube, the

slotted tube must be of sufficient size and orientation so as not to

interfere with the free flow of effluent through the entire optical

volume of the COMS photodetector. The manufacturer must also present

information in the certificate of conformance that the slotted tube

minimizes light reflections. As a minimum, this demonstration shall

consist of laboratory operation of the COMS both with, and without

the slotted tube in position. The slotted portion must meet the

monitoring pathlength requirements of 2.16.3.

5. Design Specifications.

* * * * *

5.1.2 Angle of View. The total AOV shall be no greater than 4

degrees for all radiation above 2.5 percent of peak.

5.1.3 Angle of Projection. The total AOP shall be no greater

than 4 degrees for all radiation above 2.5 percent of peak.

5.1.4 Optical Alignment Indicator. Each opacity monitor must

provide some method for visually or electronically determining that

each separate portion of the COMS, the transmitter or transceiver

and detector or

[[Page 50830]]

reflector, is optically aligned with respect to the optical axis of

the system. The method provided must be capable of clearly

indicating that the unit is misaligned when an error of no greater

than 2 percent opacity occurs due to misalignment at the

installation pathlength. Instruments that are capable of providing a

clear path zero check while in operation on a stack or duct with

effluent present, and while maintaining the same optical alignment

during measurement and calibration, need not meet this requirement

(e.g., some ``zero pipe'' units). The owner and operator shall

insure that the COMS manufacturer's written procedures and the

certificate of conformance depict the correct alignment and the

misalignment corresponding to a 2 percent opacity shift

as viewed using the alignment sight.

5.1.5 Insensitivity to Supply Voltage Variation. The opacity

monitor output shall not deviate more than 1.0 percent

single pass opacity for variations in the supply voltage over

10 percent from nominal or the range specified by the

manufacturer, whichever is greater. The zero and upscale calibration

responses at the minimum and maximum supply voltages shall not vary

by more than 1.0 percent single pass opacity relative to

the responses at the nominal supply voltage.

5.1.6 Thermal Stability. The opacity monitor output shall not

deviate more than 2.0 percent single pass opacity per

40 deg.F change in ambient temperature over the range specified by

the manufacturer. The zero and upscale calibration responses at the

minimum and maximum temperatures shall not vary by more than

2.0 percent single pass opacity per 40 deg.F change in

temperature relative to the responses at the initial temperature.

5.1.7 Insensitivity to Ambient Light. The opacity monitor

output shall not deviate more than 2.0 percent single

pass opacity relative to the initial response for any six-minute

period from sunrise to sunset.

5.1.8 Simulated Zero and Upscale Calibration System. Each

analyzer must include a calibration system for simulating a zero and

upscale calibration value. This calibration system must provide, as

a minimum, a simultaneous system check of all of the active analyzer

internal optics, all active electronic circuitry including the

primary light source (lamp) and photodetector assembly, and electro-

mechanical systems used during normal measurement operation.

5.1.9 Automated Zero and Upscale Value Compensation Recorder,

Indicator, and Alarm. The COMS shall provide an automated means for

determining and recording the actual amount of 24-hour zero

compensation on a daily basis. The COMS also shall provide an alarm

(visual or audible) when a 4 percent opacity zero

compensation has been exceeded. This indicator shall be at a

location which can be seen or heard by the operator (e.g., process

control room) and accessible to the operator (e.g., the data output

terminal).

5.1.9.1 During the operational test period, the COMS also must

provide a means for determining and automatically recording the

actual amount of upscale calibration value compensation at specified

2-hour intervals so that the actual 2-hour upscale calibration value

shift can be determined (see section 7.3.3).

5.1.9.2 The determination of dirt accumulation on all surfaces

exposed to the effluent being measured shall include only those

surfaces in the direct path of the measuring light beam under normal

opacity measurement and with the zero calibration value in place or

equivalent mechanism necessary for the dirt compensation

measurement. The dust accumulation must actually be measured.

5.1.10 External Calibration Filter Access. The COMS must be

designed to accommodate an independent assessment of the total

systems response to external audit filters. An adequate design shall

permit the use of external (i.e., not intrinsic to the instrument)

neutral density filters to assess monitor operation during

performance audits. The external audit filter access design shall

ensure that the entire beam received by the detector will pass

through the attenuator and that the attenuator is inserted in a

manner which minimizes interference from the reflected light. This

system may include an external audit zero-jig as identified in

section 2.9.

5.1.11 Pathlength Correction Factor Recording and Indicating

System. The COMS shall display and record all opacity values

corrected to the emission outlet pathlength. Equations 1-7 or 1-8

may be used. The system shall be designed and constructed so that

the PLCF cannot be changed by the end user, or is recorded during

each calibration check cycle, or provides an alarm when the value is

changed.

5.1.12 External Fault Indicator. The installed COMS must

provide a means to automatically alert the owner or operator when a

component or performance parameter has failed or been exceeded

(e.g., projector lamp failure, zero or upscale calibration error,

purge air blower failure, data recorder failure). Indicator lights

or alarms must be visible or audible to the operator(s).

5.1.13 Data recorder resolution. The data recorder and data

acquisition system shall record and display opacity values to 0.5

percent opacity.

Table 1-1.--COMS Design Specifications

------------------------------------------------------------------------

1. Peak and mean spectral response.

2. Angle of view.

3. Angle of projection.

4. Optical alignment indicator.

5. Insensitivity to supply voltage variation.

6. Thermal stability.

7. Insensitivity to ambient light.

8. Simulated zero and upscale calibration system.

9. Automated zero and upscale value compensation recorder, indicator,

and alarm.

10. External calibration filter access.

11. Pathlength correction factor recording and indicating system.

12. External fault indicator.

13. Data recorder resolution.

------------------------------------------------------------------------

6. Design Specifications Verification Procedures.

These procedures apply to all instruments installed for purposes

of complying with opacity monitoring requirements (see section 1.1,

Applicability). The source owner or operator is responsible for the

overall COMS performance demonstration required by the applicable

standards. As an alternative, the COMS manufacturer may conduct the

COMS design verification procedures called for in this section and

provide to the source owner or operator a Manufacturer's Certificate

of Conformance (MCOC). These procedures will be conducted, detailed,

and the results submitted in the MCOC (section 9.5) as an integral

part of each COMS demonstration required by the applicable

standards. In order to assure that the design and procedures to

demonstrate conformance with this section coincide with the design

procedures as stated in the MCOC, the manufacturer is encouraged to

seek an evaluation by the Administrator of the manufacturer's

conformance demonstration practices. The procedures to demonstrate

conformance with this section may require modification to

accommodate instrument designs. All procedural modifications

required to demonstrate conformance with the specifications of this

section must be approved, in writing, by the Administrator. The

owner and operator or the manufacturer, as appropriate, will obtain

any approvals of modifications to the specifications of this section

before regulatory agency review and acceptance of the overall COMS

performance evaluations.

6.1 Selection of Analyzer. A representative analyzer for each

analyzer design will be selected for testing according to ASTM D6216

(incorporated by reference--see 40 CFR Sec. 60.17), sections 6.1.1,

6.1.2, and 6.1.3.

6.2 Spectral Response. The spectral response test will be

performed according to ASTM D6216 (incorporated by reference--see 40

CFR Sec. 60.17), section 6.2.

6.3 Angle of View and Angle of Projection. The procedures for

verifying the AOV and AOP will be performed according to ASTM D6216

(incorporated by reference--see 40 CFR Sec. 60.17), section 6.3.

6.4 Insensitivity to Supply Voltage Variations. This design

specification is to ensure that the accuracy of opacity monitoring

data is not affected by supply voltage variations over the range

specified by the manufacturer or 10 percent from

nominal, whichever is greater. The test will be performed according

to ASTM D6216 (incorporated by reference--see 40 CFR Sec. 60.17),

section 6.4.

6.5 Thermal Stability. This design specification is to ensure

that the accuracy of opacity monitoring data is not affected by

ambient temperature variations over the range specified by the

manufacturer. This test procedure will be performed according to

ASTM D6216 (incorporated by reference--see 40 CFR Sec. 60.17),

section 6.5.

6.6 Insensitivity to Ambient Light. This design specification

is to ensure that the accuracy of opacity monitoring data is not

affected by ambient light. The test will be performed according to

ASTM D6216 (incorporated by reference--see 40 CFR 60.17), section

6.6.

[[Page 50831]]

6.7 Calibration Check Devices. Tests of devices used to

determine simulated zero and upscale calibration will be performed

according to ASTM D6216 (incorporated by reference--see 40 CFR

60.17), section 6.9.

6.8 Unacceptable Findings. Whenever a manufacturer finds that a

COMS model does not conform to any of the design specification

requirements of sections 6.2 through 6.7, the manufacturer will

institute corrective action in accordance with its quality assurance

program and remedy the cause of the unacceptable performance. The

manufacturer will then test all of the monitors in the group and

verify conformance with the design specifications for each monitor

before they are shipped to the end users. Additionally, the

manufacturer will notify and provide the findings to all source

owners or operators that have received or installed such

nonconforming COMS models manufactured after the date of the

previous successful conformance demonstration. The manufacturer will

submit copies of the purchaser notifications to the U.S.

Environmental Protection Agency, Director, Air Enforcement Division

(AR 1119), 1200 Pennsylvania Avenue, NW., Washington, DC 20044.

7. Performance Specifications Verification Procedure.

The owner and operator shall ensure that the following procedures

and tests are performed on each COMS that conforms to the design

specifications (Table 1-1) to determine conformance with the

specifications of Table 1-2. The tests described in sections 7.1.4,

7.1.5, and 7.1.6 shall be conducted at the manufacturer's facility.

Table 1-2.--Performance Specifications

------------------------------------------------------------------------

Parameter Specifications

------------------------------------------------------------------------

Calibration error a....................... 3 percent

opacity.

Response time............................. 10 seconds.

Operational test period b................. 336 hours.

Zero drift (24-hour) a.................... 2 percent

opacity.

Calibration drift (24-hour)............... 2 percent

opacity.

Zero drift (1-hour)....................... 2 percent

opacity.

Calibration drift (1-hour)................ 2 percent

opacity.

------------------------------------------------------------------------

a Expressed as the sum of the absolute value of the mean and the

absolute value of the confidence coefficient.

b During the operational test period, the COMS must not require any

corrective maintenance, repair, replacement, or adjustment other than

that clearly specified as routine and required in the operation and

maintenance manuals.

7.1 Preliminary Adjustments and Tests.

7.1.1 Equipment Preparation.

The equipment preparation shall be done according to ASTM D6216

(incorporated by reference--see 40 CFR 60.17), sections 7.2, 7.3,

and 7.4.

7.1.2 Calibration Attenuator Selection.

7.1.2.1 Based on the applicable opacity standard, select a

minimum of three calibration attenuators (low-, mid-, and high-

level) based on the following opacity values presented in Table 1-3:

Table 1-3.--Required Calibration Opacity Values

------------------------------------------------------------------------

10 to

For opacity standard of 19% 20%

------------------------------------------------------------------------

Low Level..................................... 5-10 10-20

Mid Level..................................... 10-20 20-30

High Level.................................... 20-40 30-60

------------------------------------------------------------------------

If the applicable opacity standard is less than 10 percent, the

selection of calibration attenuators shall be based on 10 percent

opacity.

7.1.2.2 Calculate the attenuator values required to obtain a

system response equivalent to the applicable values in the ranges

specified in table 1-3 using equation 1-1. Select attenuators having

the values closest to those calculated by equation 1-1. A series of

filters with actual opacity values relative to the values calculated

are commercially available.

[GRAPHIC] [TIFF OMITTED] TP23SE98.000

where:

OP1=Nominal opacity value of required low-, mid-, or

high-range calibration attenuators.

OP2=Desired attenuator opacity value from Table 1-3 at

the opacity standard required by the applicable subpart.

L1=Monitoring pathlength.

L2=Emission outlet pathlength.

7.1.3 Attenuator Calibration.

* * * * *

7.1.3.1.3 Recalibrate the primary attenuators used for the

required calibration error test semi-annually. Recalibrate annually

if the primary attenuators are used only for calibration of

secondary attenuators.

7.1.3.2 Secondary Attenuators. Calibrate the secondary

attenuators, if used to conduct COMS calibration error tests, semi-

annually. The filter calibration may be conducted using a

laboratory-based transmissometer calibrated as follows:

* * * * *

7.1.4 Calibration Error Test. The calibration error test shall

be performed according to ASTM D6216 (incorporated by reference--see

40 CFR 60.17), section 7.8. Calculate the arithmetic mean

difference, standard deviation, and confidence coefficient of the

five tests at each attenuator value using equations 1-3, 1-4, and 1-

5 (sections 8.1 to 8.3). Calculate the calibration error as the sum

of the absolute value of the mean difference and the 95 percent

confidence coefficient for each of the three test attenuators.

Report the calibration error test results for each of the three

attenuators.

7.1.5 Instrument Response Time Test. Instrument response time

shall be determined according to ASTM D6216 (incorporated by

reference--see 40 CFR 60.17), section 7.7.

7.1.6 Optical Alignment Indicator. The optical alignment

indicator performance test shall be done in accordance with ASTM

D6216 (incorporated by reference--see 40 CFR Sec. 60.17), section

7.9 .

7.2 Preliminary Field Adjustments.

* * * * *

7.3 Operational Test Period. Prior to conducting the

operational testing, the owner and operator, or the manufacturer as

appropriate, should have successfully completed all prior testing of

the COMS. After completing all preliminary field adjustments

(section 7.2), operate the COMS for an initial 336-hour test period

while the source is operating under normal operating conditions.

Except during times of instrument zero and upscale calibration

checks, the owner and operator must ensure that they analyze the

effluent gas for opacity and produce a permanent record of the COMS

output. During this period, the owner and operator may not perform

unscheduled maintenance, repair, or adjustment to the COMS. The

owner or operator may perform zero and calibration adjustments

(i.e., external adjustments) only at 168-hour intervals. Perform

exposed optical and other CEMS surface cleaning, and optical

realignment only at 24-hour intervals. Automatic zero and

calibration adjustments (i.e., intrinsic adjustments), made by the

COMS without operator intervention or initiation, are allowable at

any time. During the operational test period, record all

adjustments, realignments, and exposed surface cleaning. At the end

of the operational test period, verify and record that the COMS

optical alignment is correct. If the operational test period is

interrupted because of source breakdown or regularly scheduled

source maintenance, continue the 336-hour period following

resumption of source operation. If the test period is interrupted

because of COMS failure, record the time when the failure occurred.

After the failure is corrected, the 336-hour period and tests are

restarted from the beginning (0-hour). During the operational test

period, perform the following test procedures:

7.3.1 Zero Calibration Drift Test. At the outset of the 336-

hour operational test period and at each 24-hour period, record the

initial (Reference A) zero calibration value and upscale calibration

value (UC Value), see example format figure 1-8. These values are

the initial 336-hour value established during the optical and zero

alignment procedure (see section 7.2.1 or 7.2.2). After each 24-hour

interval, check and record the COMS zero response reading before any

cleaning, optical realignment, and intrinsic adjustment. Perform any

external zero and upscale calibration adjustments only at 168-hour

periods. Perform exposed optical and other instrument surface

cleaning, and optical realignment only at 24-hour intervals (or at

such shorter intervals as the manufacturer's written instructions

specify). If shorter intervals of zero and upscale adjustment are

conducted, record the drift adjustment. However, adjustments and

cleaning must be performed when the accumulated zero calibration

drift or upscale calibration drift exceeds the 24-hour drift

specification (2 percent opacity). From the initial zero

calibration value and each 24-hour period zero readings, calculate

the 24-hour zero calibration drift (CD). At the end of the 336-

[[Page 50832]]

hour period, calculate the arithmetic mean, standard deviation, and

confidence coefficient of the 24-hour zero CD's using equations 1-3,

1-4, and 1-5. Calculate the sum of the absolute value of the mean

and the absolute value of the confidence coefficient using equation

1-6, and report this value as the 24-hour zero CD error.

7.3.2 Upscale Calibration Drift Test. At each 24-hour interval,

after the zero calibration value has been checked and any optional

or required adjustments have been made, check and record the COMS

response to the upscale calibration value. Compare the COMS response

to the upscale calibration value established under the optical and

zero alignment procedure of section 7.2.1 or 7.2.2 as the initial

value. The upscale calibration established in section 7.2.1 shall be

used each 24-hour period. From the initial upscale calibration value

and each 24-hour period upscale readings, calculate the 24-hour

upscale CD. At the end of the 336-hour period, calculate the

arithmetic mean, standard deviation, and confidence coefficient of

the 24-hour upscale CD using equations 1-3, 1-4, and 1-5. Calculate

the sum of the absolute value of the mean and the absolute value of

the confidence coefficient, and report this value as the 24-hour

upscale CD error.

7.3.3 Calibration Stability Test. Immediately following or

during, the operational test period, conduct a calibration stability

test over a 24-hour period. During this period, there will be no

unscheduled maintenance, repair, manual adjustment of the zero and

calibration values, exposed optical and other instrument surface

cleaning, or optical realignment performed. Record the initial zero

and upscale calibration opacity values and operate the monitor in a

normal manner. After each 2-hour period, record the automatically

corrected zero and upscale opacity values. Subtract the initial zero

and upscale calibration values from each 2-hour adjusted value and

record the difference. None of these differences shall exceed

2 percent opacity. Figure 1-8 may be used for the

recording of the results of this test.

7.3.4 Retesting.

* * * * *

9. Reporting.

Report the following (summarize in tabular form where

appropriate):

9.1 General Information.

* * * * *

b. Person(s) responsible for operational test period and

affiliation.

* * * * *

h. System span value, percent opacity.

* * * * *

k. Upscale calibration value, percent opacity.

l. Calibrated attenuator values (low-, mid-, and high-range),

percent opacity.

9.2 Design Specification Test Results.

* * * * *

g. Maximum deviation of opacity as a result of supply voltage

variation.

h. Zero and upscale calibration responses at nominal voltage.

i. Zero and upscale calibration responses at minimum and maximum

supply voltage.

j. Maximum deviation of opacity over ambient temperature range.

k. Zero and upscale calibration responses at initial

temperature.

l. Zero and upscale calibration responses at minimum and maximum

ambient temperature.

m. Maximum percent opacity deviation for any 6-minute period

during the day of the ambient light sensitivity test.

n. Serial number, month/year of manufacturer for unit actually

tested to show design conformance.

9.3 Performance Specification Test Results.

a. Results of optical alignment sight test. The manufacturer

will, in the testing report, include diagrams indicating the

operator's view through the optical alignment system as depicted

during the alignment tests specified in section 7.2.1.

* * * * *

c. Calibration Error Test.

(1) Report the required upscale opacity range and indicated

upscale opacity calibration value, as determined in section 6.7.

(2) Identify the low-, mid-, and high-level calibration

opacities, as determined in section 7.1.2.2.

* * * * *

e. Zero and Upscale Calibration Drift (CD) Tests. In the format

of figure 1-8:

i. Identify the 24-hour zero CD, percent opacity,

ii. Identify the 24-hour upscale CD, percent opacity,

iii. Identify any lens cleaning, clock time,

iv. Identify all optical alignment adjustments, clock time.

f. Calibration Stability Test. Present the data and results of

the calibration stability test in the format of figure 1-8.

9.4 Statements. Provide a statement that the operational test

period was completed according to the requirements of section 7.3.

In this statement, include the time periods during which the

operational test period was conducted.

9.5 Manufacturer's Certificate of Conformance (MCOC). The MCOC

must include the results of each test performed for the COMS(s)

sampled under section 6.1. The MCOC also shall specify the date of

testing according to sections 6.2 through 6.7, the COMS monitor

type, serial number, and the intended installation and purchaser of

the tested COMS. Section 9.5.1 identifies the minimally acceptable

information to be submitted by the manufacturer with the

certification of conformance.

9.5.1 Outline of Certificate of Conformance.

* * * * *

(4) Insensitivity to Supply Voltage Variations. Include the

results of testing, including the supply voltage range, all

simulated zero and upscale calibration responses, and the maximum

deviation of opacity from the external attenuator over the supply

voltage range.

(5) Thermal Stability. Include the results of testing, including

the manufacturers recommended ambient temperature range and tested

range, all simulated zero and upscale calibration responses, and the

maximum deviation of opacity from the external attenuator over the

temperature range.

(6) Insensitivity to Ambient Light. Include the results of

testing, including the test date, all simulated zero and upscale

calibration responses, ambient temperature range during the test

period, and the maximum 6-minute period percent opacity deviation

from the external attenuator.

(7) Verification of Compliance with Additional Design

Specifications. The owner and operator or manufacturer shall provide

diagrams and operational descriptions of the instrument which

demonstrate conformance with the requirements of sections 5.1.5,

5.1.7, 5.1.8, 5.1.9, and 5.1.10.

9.6 Appendix. Provide the data tabulations and calculations for

any of the above demonstrations.

10. Bibliography

* * * * *

6. Technical Assistance Document: Performance Audit Procedures

for Opacity Monitors. U.S. Environmental Protection Agency. Research

Triangle Park, NC. EPA-450/4-92-010. April 1992.

7. ASTM D6216--Standard Practice for Continuous Opacity

Monitoring Manufacturers to Certify Design Conformance and Monitor

Calibration. American Society for Testing and Materials (ASTM).

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[FR Doc. 98-25453 Filed 9-22-98; 8:45 am]

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