[Federal Register Volume 60, Number 84 (Tuesday, May 2, 1995)]
[Notices]
[Pages 21518-21520]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-10752]



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ENVIRONMENTAL PROTECTION AGENCY

[FRL-5201-1]


Office of Research and Development; Ambient Air Monitoring 
Reference and Equivalent Methods; Equivalent Method Designations

    Notice is hereby given that EPA, in accordance with 40 CFR part 53, 
has designated 3 additional equivalent methods, for the measurement of 
ambient concentrations of sulfur dioxide, nitrogen dioxide, and ozone. 
The new equivalent methods are automated methods (analyzers) that 
utilize a measurement principle based on differential optical 
absorption spectroscopy (DOAS) and measure pollutant concentrations in 
the ambient air over a long, open path up to 1 kilometer in length. The 
new designated methods are identified as follows:
    EQSA-0495-101, Opsis Model AR 500 System, open path (long path) 
ambient air monitoring system configured for measuring SO<INF>2, with 
one detector and movable grating, operated with a measurement range of 
0 to 0.5 ppm, an installed monitoring path length between 20 and 500 
meters (or 20 and 1000 meters with the ER 150 option), xenon lamp type 
B (150 watt), fiber optic cable length between 3 to 20 meters; 
operating within an ambient air temperature range of -50 to +50 deg.C, 
an analyzer temperature range of 20 to 30 deg.C, a measurement 
(integrating) time setting between 30 and 120 seconds (0 min:30 sec. to 
2 min:00 sec.), and with a complete cycle time of not more than 200 
seconds (3 min, 20 sec.). Under this method designation, the Model AR 
500 System consists of:

AR 500 opto-analyser,
Emitter EM 110 and receiver RE 110 (together identified as ER 110),
Optic fibre cable OF 60-S,
Power supply PS 150,
OPSIS operational software, version 7.0,
Initial on-site installation, setup, and limited operator training.

    Optional components that can be used in addition to or as 
alternative to corresponding components listed above are:

AR 503 opto-analyzer configured as Model AR 500 (only the center 
detector active, sequential monitoring),
Emitter/receiver ER 150 (for monitoring path lengths up to 1 
kilometer),
Xenon lamp type A (higher short-wavelength UV output),
Optic fibre cable OF 60-R (low-loss for short wavelengths),
Multiplexers MX 004 and MX 024,
Dataloggers DL 010 and DL 016,
Analogue and digital input/output cards AO 008, AI 016, and DI 032,
Analogue and digital isolation cards IA 008, ID 008, AO 008, and OD 
008,
Window heaters HF 110 and HF 150,
Mirror heaters HM 110 and HM 150,
Auto calibration unit CU 007,
Software packages IO 80 version 1.4 (for the analogue and digital 
input/output adapters), DL10 and DL16 (for data loggers), ComVision, 
and STAT 500;

and recommended calibration and accuracy audit components (or 
equivalent):

Wavelength calibration lamp CA 004,
Calibration bench CB 100,
Receiver unit RE 060 (two required),
Calibration unit CA 150, with same type lamp as used in the monitoring 
path emitter, [[Page 21519]] 
Power supply PS 150 for calibration unit CA 150,
Calibration cells CC 001-X, where X represents various cell lengths 
from 1 to 900 mm,
Special calibration cells CC 110 or CC 150 (for mounting directly on 
receiver),
Light meter LM 010.
    EQNA-0495-102, Opsis Model AR 500 System, open path (long path) 
ambient air monitoring system configured for measuring NO<INF>2, with 
one detector and movable grating, operated with a measurement range of 
0 to 0.5 ppm, an installed monitoring path length between 50 and 500 
meters (or 50 and 1000 meters with the ER 150 option), xenon lamp type 
B (150 watt), fiber optic cable length between 3 to 20 meters; 
operating within an ambient air temperature range of -50 to +50 deg.C, 
an analyzer temperature range of 20 to 30 deg.C, a measurement 
(integrating) time setting between 30 and 120 seconds (0 min:30 sec. to 
2 min:00 sec.), and with a complete cycle time of not more than 200 
seconds (3 min, 20 sec.). Under this method designation, the Model AR 
500 System consists of:

AR 500 opto-analyser,
Emitter EM 110 and receiver RE 110 (together identified as ER 110),
Optic fibre cable OF 60-S,
Power supply PS 150,
OPSIS operational software, version 7.0,
Initial on-site installation, setup, and limited operator training.

    Optional components that can be used in addition to or as 
alternative to corresponding components listed above are:

AR 503 opto-analyzer configured as Model AR 500 (only the center 
detector active, sequential monitoring),
Emitter/receiver ER 150 (for monitoring path lengths up to 1 
kilometer),
Xenon lamp type A (higher short-wavelength UV output),
Optic fibre cable OF 60-R (low-loss for short wavelengths),
Multiplexers MX 004 and MX 024,
Dataloggers DL 010 and DL 016,
Analogue and digital input/output cards AO 008, AI 016, and DI 032,
Analogue and digital isolation cards IA 008, ID 008, AO 008, and OD 
008,
Window heaters HF 110 and HF 150,
Mirror heaters HM 110 and HM 150,
Auto calibration unit CU 007,
Software packages IO 80 version 1.4 (for the analogue and digital 
input/output adapters), DL10 and DL16 (for data loggers), ComVision, 
and STAT 500;

and recommended calibration and accuracy audit components (or 
equivalent);

Wavelength calibration lamp CA 004,
Calibration bench CB 100,
Receiver unit RE 060 (two required),
Calibration unit CA 150, with same type lamp as used in the monitoring 
path emitter,
Power supply PS 150 for calibration unit CA 150,
Calibration cells CC 001-X, where X represents various cell lengths 
from 1 to 900 mm,
Filter GG 400,
Special calibration cells CC 110 or CC 150 (for mounting directly on 
receiver),
Light meter LM 010.

    EQOA-0495-103, Opsis Model AR 500 System, open path (long path) 
ambient air monitoring system configured for measuring O<INF>3, with 
one detector and moveable grating, operated with a measurement range of 
0 to 0.5 ppm, an installed monitoring path length between 20 and 500 
meters (or 20 and 1000 meters with the ER 150 option), xenon lamp type 
B (150 watt), fiber optic cable length between 3 to 20 meters; 
operating within an ambient air temperature range of -50 to +50 deg. C, 
an analyzer temperature range of 20 to 30 deg. C, a measurement 
(integrating) time setting between 30 and 120 seconds (0 min:30 sec. to 
2 min:00 sec.), and with a complete cycle time of not more than 200 
seconds (3 min, 20 sec.). Under this method designation, the Model AR 
500 System consists of:

AR 500 opto-analyser,
Emitter EM 110 and receiver RE 110 (together identified as ER 110),
Optic fibre cable OF 60-S,
Power supply PS 150,
OPSIS operational software, version 7.0,
Initial on-site installation, setup, and limited operator training.

    Optional components that can be used in addition to or as 
alternative to corresponding components listed above are:

AR 503 optoanalyzer configured as Model AR 500 (only the center 
detector active, sequential monitoring),
Emitter/receiver ER 150 (for monitoring path lengths up to 1 
kilometer),
Optic fibre cable OF 60-R (low-loss for short wavelengths),
Multiplexers MX 004 and MX 024,
Dataloggers DL 010 and DL 016,
Analogue and digital input/output adapters AO 008, AI 016, and DI 032,
Analogue and digital isolation cards IA 008, ID 008, OA 008, and OD 
008,
Window heaters HF 110 and HF 150,
Mirror heaters HM 110 and HM 150,
Auto calibration unit CU 007,
Software packages IO 80 version 1.4 (for the analogue and digital 
input/output adapters), DL10 and DL16 (for data loggers), ComVision, 
and STAT 500;

and recommended calibration and accuracy audit components (or 
equivalent):

Wavelength calibration lamp CA 004,
Calibration bench CB 100,
Receiver unit RE 060 (two required),
Calibration unit CA 150, with same type lamp as used in the monitoring 
path emitter,
Power supply PS 150 for calibration unit CA 150,
Calibration cells CC 001-X, where X represents various cell lengths 
from 1 to 900 mm,
Special calibration cells CC 110 or CC 150 (for mounting directly on 
the receiver),
Ozone generator OC 500,
Light meter LM 010.

    These methods are manufactured by Opsis AB, Furulund, Sweden and 
are available from ABB Power Plant Controls, Division of Combustion 
Engineering, Inc., 2 Waterside Crossing, Windsor, CT 06095. Notices of 
receipt of applications for these methods appeared in the Federal 
Register, Volume 56, October 29, 1991, page 55673; Volume 56, November 
20, 1991, page 58574; and Volume 57, January 29, 1992, page 3429.
    A test analyzer representative of these methods has been tested by 
the applicant, in accordance with the test procedures specified in 40 
CFR part 53. After reviewing the results of these tests and other 
information submitted by the applicant, EPA has determined, in 
accordance with part 53, that these methods should be designated as 
equivalent methods. The information submitted by the applicant will be 
kept on file at EPA's Atmospheric Research and Exposure Assessment 
Laboratory, Research Triangle Park, North Carolina 27711, and will be 
available for inspection to the extent consistent with 40 CFR part 2 
(EPA's regulations implementing the Freedom of Information Act).
    As designated equivalent methods, these methods are acceptable for 
use by States and other air monitoring agencies under the requirements 
of 40 CFR part 58, Ambient Air Quality Surveillance. For such purposes, 
each method must be used in strict accordance with the operation or 
instruction manual associated with the method and subject to any 
limitations (e.g., operating range) specified in the applicable 
designation (see descriptions of the methods above). Users should note 
that these methods are the first methods designated that use a long 
path (open path) measurement principle. Amendments to the ambient air 
monitoring regulations at 40 CFR [[Page 21520]] part 58 were proposed 
on August 18, 1994 (59 FR 42541) to address the application, siting, 
and operational quality assurance of open path analyzers, and 
supplemental quality assurance guidance is in preparation. Until these 
regulatory amendments are promulgated and the supplemental guidance for 
open path analyzers is available, monitoring agencies interested in 
using these methods should contact the U.S. EPA for interim guidance 
pertaining to network design, siting, and quality assurance issues. The 
EPA contact person for information on these issues is Ms. Lee Ann B. 
Byrd, Monitoring and Quality Assurance Group, Office of Air Quality 
Planning and Standards, telephone number (919) 541-5367.
    Vendor modifications of a designated method used for purposes of 
part 58 are permitted only with prior approval of EPA, as provided in 
part 53. Provisions concerning modification of such methods by users 
are specified under section 2.8 of appendix C to 40 CFR part 58 
(Modifications of Methods by Users).
    In general, one of these designations will apply to any analyzer 
which is identical to the analyzer described in the designation. In 
some cases, similar analyzers manufactured prior to the designation may 
be upgraded (e.g., by minor modification or by substitution of a new 
operation or instruction manual) so as to be identical to the 
designated method and thus achieve designation status at a modest cost. 
The manufacturer should be consulted to determine the feasibility of 
such upgrading.
    Part 53 requires that sellers of designated methods comply with 
certain conditions. These conditions are given in 40 CFR 53.9 and are 
summarized below:
    (1) A copy of the approved operation or instruction manual must 
accompany the analyzer when it is delivered to the ultimate purchaser.
    (2) The analyzer must not generate any unreasonable hazard to 
operators or to the environment.
    (3) The analyzer must function within the limits of the performance 
specifications given in table B-1 of part 53 for at least one year 
after delivery when maintained and operated in accordance with the 
operation manual.
    (4) Any analyzer offered for sale as a reference or equivalent 
method must bear a label or sticker indicating that it has been 
designated as a reference or equivalent method in accordance with part 
53.
    (5) If such an analyzer has two or more selectable ranges, the 
label or sticker must be placed in close proximity to the range 
selector and indicate which range or ranges have been included in the 
reference or equivalent method designation.
    (6) An applicant who offers analyzers for sale as reference or 
equivalent methods is required to maintain a list of ultimate 
purchasers of such analyzers and to notify them within 30 days if a 
reference or equivalent method designation applicable to the analyzers 
has been canceled or if adjustment of the analyzers is necessary under 
40 CFR 53.11(b) to avoid a cancellation.
    (7) An applicant who modifies an analyzer previously designated as 
a reference or equivalent method is not permitted to sell the analyzer 
(as modified) as a reference or equivalent method (although he may 
choose to sell it without such representation), nor to attach a label 
or sticker to the analyzer (as modified) under the provisions described 
above, until he has received notice under 40 CFR 53.14(c) that the 
original designation or a new designation applies to the method as 
modified or until he has applied for and received notice under 40 CFR 
53.8(b) of a new reference or equivalent method determination for the 
analyzer as modified.
    Aside from occasional breakdowns or malfunctions, consistent or 
repeated noncompliance with any of these conditions should be reported 
to: Director, Atmospheric Research and Exposure Assessment Laboratory, 
Department E (MD-77), U.S. Environmental Protection Agency, Research 
Triangle Park, North Carolina 27711.
    Designation of these equivalent methods is intended to provide 
assistance to the States in establishing and operating their air 
quality surveillance systems under part 58. Technical questions 
concerning the method should be directed to the distributor. Additional 
information concerning this action may be obtained from Frank F. 
McElroy, Methods Research and Development Division (MD-77), Atmospheric 
Research and Exposure Assessment Laboratory, U.S. Environmental 
Protection Agency, Research Triangle Park, North Carolina 27711, (919) 
541-2622.
Henry L. Longest II,
Acting Assistant Administrator for Research and Development.
[FR Doc. 95-10752 Filed 5-1-95; 8:45 am]
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