quantifiable, then establishment of the concentration by

some credible verification method is required.
    (b) The test atmosphere delivery system shall be designed and
constructed so as not to significantly alter the test atmosphere
composition or concentration during the period of the test. The system
shall be vented to insure that test atmospheres are presented to the
test analyzer at very nearly atmospheric pressure. The delivery system
shall be fabricated from borosilicate glass, FEP Teflon, or other
material that is inert with regard to the gas or gases to be used.
    (c) The output of the test atmosphere generation system shall be
sufficiently stable to obtain stable response readings from the test
analyzer during the required tests. If a permeation device is used for
generation of a test atmosphere, the device, as well as the air passing
over it, shall be controlled to 0.1 [deg]C.
    (d) All diluent air shall be zero air free of contaminants likely
to react with the test atmospheres or cause a detectable response on
the test analyzer.
    (e) The concentration of each test atmosphere used shall be
quantitatively established and/or verified before or during each series
of tests. Samples for verifying test concentrations shall be collected
from the test atmosphere delivery system as close as feasible to the
sample intake port of the test analyzer.
    (f) The accuracy of all flow measurements used to calculate test
atmosphere concentrations shall be documented and referenced to a
primary flow rate or volume standard (such as a spirometer, bubble
meter, etc.). Any corrections shall be clearly shown. All flow
measurements given in volume units shall be standardized to 25 [deg]C
and 760 mm Hg.
    (g) Schematic drawings, photos, descriptions, and other information
showing complete procedural details of the test atmosphere generation,
verification, and delivery system shall be provided. All pertinent
calculations shall be clearly indicated.

Sec.  53.23  Test procedures.

    (a) Range--(1) Technical definition. The nominal minimum and
maximum concentrations that a method is capable of measuring.

    Note to Sec.  53.23(a)(1): The nominal range is given as the
lower and upper range limits in concentration units, for example, 0-
0.5 parts per million (ppm).

    (2) Test procedure. Determine and submit a suitable calibration
curve, as specified in Sec.  53.21(b), showing the test analyzer's
measurement response over at least 95 percent of the required or
indicated measurement range.

    Note to Sec.  53.23(a)(2): A single calibration curve for each
measurement range for which an FRM or FEM designation is sought will
normally suffice.

    (b) Noise--(1) Technical definition. Spontaneous, short duration
deviations in measurements or measurement signal output, about the mean
output, that are not caused by input concentration changes. Measurement
noise is determined as the standard deviation of a series of
measurements of a constant concentration about the mean and is
expressed in concentration units.
    (2) Test procedure. (i) Allow sufficient time for the test analyzer
to warm up and stabilize. Determine measurement noise at each of two
fixed concentrations, first using zero air and then a pollutant test
gas concentration as indicated below. The noise limit specification in
table B-1 to subpart B of part 53 shall apply to both of these tests.
    (ii) For an analyzer with an analog signal output, connect an
integrating-type digital meter (DM) suitable for the test analyzer's
output and accurate to three significant digits, to determine the
analyzer's measurement output signal.

    Note to Sec.  53.23(b)(2): Use of a chart recorder in addition
to the DM is optional.

    (iii) Measure zero air with the test analyzer for 60 minutes.
During this 60-minute interval, record twenty-five (25) test analyzer
concentration measurements or DM readings at 2-minute intervals. (See
Figure B-2 in appendix A of this subpart.)
    (iv) If applicable, convert each DM test reading to concentration
units (ppm) or adjust the test readings (if necessary) by reference to
the test analyzer's calibration curve as determined in Sec.  53.21(b).
Label and record the test measurements or converted DM readings as
r1, r2, r3 . . . ri . . .
r25.
    (v) Calculate measurement noise as the standard deviation, S, as
follows:
[GRAPHIC] [TIFF OMITTED] TR31AU11.005

Where i indicates the i-th test measurement or DM reading in ppm.

    (vi) Let S at 0 ppm be identified as S0; compare
S0 to the noise limit specification given in table B-1 to
subpart B of part 53.
    (vii) Repeat steps in Paragraphs (b)(2)(iii) through (v) of this
section using a pollutant test atmosphere concentration of 80  5 percent of the URL instead of zero air, and let S at 80
percent of the URL be identified as S80. Compare
S80 to the noise limit specification given in table B-1 to
subpart B of part 53.
    (viii) Both S0 and S80 must be less than or
equal to the table B-1 to subpart B of part 53 noise limit
specification to pass the test for the noise parameter.
    (c) Lower detectable limit--(1) Technical definition. The minimum
pollutant concentration that produces a measurement or measurement
output signal of at least twice the noise level.
    (2) Test procedure. (i) Allow sufficient time for the test analyzer
to warm up and stabilize. Measure zero air and record the stable
measurement reading in ppm as BZ. (See Figure B-3 in
appendix A of this subpart.)
    (ii) Generate and measure a pollutant test concentration equal to
the value for the lower detectable limit specified in table B-1 to
subpart B of part 53.

    Note to Sec.  53.23(c)(2): If necessary, the test concentration
may be generated or verified at a higher concentration, then
quantitatively and accurately diluted with zero air to the final
required test concentration.

    (iii) Record the test analyzer's stable measurement reading, in
ppm, as BL.
    (iv) Determine the lower detectable limit (LDL) test result as LDL
= BL - BZ. Compare this LDL value with the noise level, S0,
determined in Sec.  53.23(b), for the 0 concentration test atmosphere.
LDL must be equal to or higher than 2 x S0 to pass this
test.
    (d) Interference equivalent--(1) Technical definition. Positive or
negative measurement response caused by a substance other than the one
being measured.
    (2) Test procedure. The test analyzer shall be tested for all
substances likely to cause a detectable response. The test analyzer
shall be challenged, in turn, with each potential interfering agent
(interferent) specified in table B-3 to subpart B of part 53. In the
event that there are substances likely to cause a significant
interference which have not been specified in table B-3 to subpart B of
part 53, these substances shall also be tested, in a manner similar to
that for the specified interferents, at a concentration substantially
higher than that likely to be found in the ambient air. The
interference may be either positive or negative, depending on whether
the test analyzer's measurement response is increased or decreased by
the presence of the interferent. Interference equivalents shall be
determined by mixing each interferent, one at a time, with the
pollutant at an interferent test concentration not lower than the test
concentration specified in table B-3 to subpart B of part 53 (or as
otherwise required for unlisted interferents), and

comparing the test analyzer's measurement response to the response
caused by the pollutant alone. Known gas-phase reactions that might
occur between a listed interferent and the pollutant are designated by
footnote 3 in table B-3 to subpart B of part 53. In these cases, the
interference equivalent shall be determined without mixing with the
pollutant.
    (i) Allow sufficient time for warm-up and stabilization of the test
analyzer.
    (ii) For a candidate method using a prefilter or scrubber device
based upon a chemical reaction to derive part of its specificity and
which device requires periodic service or maintenance, the test
analyzer shall be ``conditioned'' prior to conducting each interference
test series. This requirement includes conditioning for the
NO2 converter in chemiluminescence NO/NO2/
NOX analyzers and for the ozone scrubber in UV-absorption
ozone analyzers. Conditioning is as follows:
    (A) Service or perform the indicated maintenance on the scrubber or
prefilter device, as if it were due for such maintenance, as directed
in the manual referred to in Sec.  53.4(b)(3).
    (B) Before testing for each potential interferent, allow the test
analyzer to sample through the prefilter or scrubber device a test
atmosphere containing the interferent at a concentration not lower than
the value specified in table B-3 to subpart B of part 53 (or, for
unlisted potential interferents, at a concentration substantially
higher than likely to be found in ambient air). Sampling shall be at
the normal flow rate and shall be continued for 6 continuous hours
prior to the interference test series. Conditioning for all applicable
interferents prior to any of the interference tests is permissible.
Also permissible is simultaneous conditioning with multiple
interferents, provided no interferent reactions are likely to occur in
the conditioning system.
    (iii) Generate three test atmosphere streams as follows:
    (A) Test atmosphere P: Pollutant test concentration.
    (B) Test atmosphere I: Interferent test concentration.
    (C) Test atmosphere Z: Zero air.
    (iv) Adjust the individual flow rates and the pollutant or
interferent generators for the three test atmospheres as follows:
    (A) The flow rates of test atmospheres I and Z shall be equal.
    (B) The concentration of the pollutant in test atmosphere P shall
be adjusted such that when P is mixed (diluted) with either test
atmosphere I or Z, the resulting concentration of pollutant shall be as
specified in table B-3 to subpart B of part 53.
    (C) The concentration of the interferent in test atmosphere I shall
be adjusted such that when I is mixed (diluted) with test atmosphere P,
the resulting concentration of interferent shall be not less than the
value specified in table B-3 to subpart B of part 53 (or as otherwise
required for unlisted potential interferents).
    (D) To minimize concentration errors due to flow rate differences
between I and Z, it is recommended that, when possible, the flow rate
of P be from 10 to 20 times larger than the flow rates of I and Z.
    (v) Mix test atmospheres P and Z by passing the total flow of both
atmospheres through a (passive) mixing component to insure complete
mixing of the gases.
    (vi) Sample and measure the mixture of test atmospheres P and Z
with the test analyzer. Allow for a stable measurement reading, and
record the reading, in concentration units, as R (see Figure B-3).
    (vii) Mix test atmospheres P and I by passing the total flow of
both atmospheres through a (passive) mixing component to insure
complete mixing of the gases.
    (viii) Sample and measure this mixture of P and I with the test
analyzer. Record the stable measurement reading, in concentration
units, as RI.
    (ix) Calculate the interference equivalent (IE) test result as:

IE = RI - R.

IE must be within the limits (inclusive) specified in table B-1 to
subpart B of part 53 for each interferent tested to pass the
interference equivalent test.
    (x) Follow steps (iii) through (ix) of this section, in turn, to
determine the interference equivalent for each listed interferent as
well as for any other potential interferents identified.
    (xi) For those potential interferents which cannot be mixed with
the pollutant, as indicated by footnote (3) in table B-3 to subpart B
of part 53, adjust the concentration of test atmosphere I to the
specified value without being mixed or diluted by the pollutant test
atmosphere. Determine IE as follows:
    (A) Sample and measure test atmosphere Z (zero air). Allow for a
stable measurement reading and record the reading, in concentration
units, as R.
    (B) Sample and measure the interferent test atmosphere I. If the
test analyzer is not capable of negative readings, adjust the analyzer
(not the recorder) to give an offset zero. Record the stable reading in
concentration units as RI, extrapolating the calibration curve, if
necessary, to represent negative readings.
    (C) Calculate IE = RI - R. IE must be within the limits (inclusive)
specified in table B-1 to subpart B of part 53 for each interferent
tested to pass the interference equivalent test.
    (xii) Sum the absolute value of all the individual interference
equivalent test results. This sum must be equal to or less than the
total interferent limit given in table B-1 to subpart B of part 53 to
pass the test.
    (e) Zero drift, span drift, lag time, rise time, fall time, and
precision--(1) Technical definitions--(i) Zero drift: The change in
measurement response to zero pollutant concentration over 12- and 24-
hour periods of continuous unadjusted operation.
    (ii) Span drift: The percent change in measurement response to an
up-scale pollutant concentration over a 24-hour period of continuous
unadjusted operation.
    (iii) Lag time: The time interval between a step change in input
concentration and the first observable corresponding change in
measurement response.
    (iv) Rise time: The time interval between initial measurement
response and 95 percent of final response after a step increase in
input concentration.
    (v) Fall time: The time interval between initial measurement
response and 95 percent of final response after a step decrease in
input concentration.
    (vi) Precision: Variation about the mean of repeated measurements
of the same pollutant concentration, expressed as one standard
deviation.
    (2) Tests for these performance parameters shall be accomplished
over a period of seven (7) or fifteen (15) test days. During this time,
the line voltage supplied to the test analyzer and the ambient
temperature surrounding the analyzer shall be changed from day to day,
as required in paragraph (e)(4) of this section. One test result for
each performance parameter shall be obtained each test day, for seven
(7) or fifteen (15) test days, as determined from the test results of
the first seven days. The tests for each test day are performed in a
single integrated procedure.
    (3) The 24-hour test day may begin at any clock hour. The first
approximately 12 hours of each test day are required for testing 12-
hour zero drift. Tests for the other parameters shall be conducted any
time during the remaining 12 hours.
    (4) Table B-4 to subpart B of part 53 specifies the line voltage
and room temperature to be used for each test day. The applicant may
elect to specify a

wider temperature range (minimum and maximum temperatures) than the
range specified in table B-4 to subpart B of part 53 and to conduct
these tests over that wider temperature range in lieu of the specified
temperature range. If the test results show that all test parameters of
this section Sec.  53.23(e) are passed over this wider temperature
range, a subsequent FRM or FEM designation for the candidate method
based in part on this test shall indicate approval for operation of the
method over such wider temperature range. The line voltage and
temperature shall be changed to the specified values (or to the
alternative, wider temperature values, if applicable) at the start of
each test day (i.e., at the start of the 12-hour zero test). Initial
adjustments (day zero) shall be made at a line voltage of 115 volts
(rms) and a room temperature of 25 [deg]C.
    (5) The tests shall be conducted in blocks consisting of 3 test
days each until 7 (or 15, if necessary) test results have been
obtained. (The final block may contain fewer than three test days.)
Test days need not be contiguous days, but during any idle time between
tests or test days, the test analyzer must operate continuously and
measurements must be recorded continuously at a low chart speed (or
equivalent data recording) and included with the test data. If a test
is interrupted by an occurrence other than a malfunction of the test
analyzer, only the block during which the interruption occurred shall
be repeated.
    (6) During each test block, manual adjustments to the electronics,
gas, or reagent flows or periodic maintenance shall not be permitted.
Automatic adjustments that the test analyzer performs by itself are
permitted at any time.
    (7) At least 4 hours prior to the start of the first test day of
each test block, the test analyzer may be adjusted and/or serviced
according to the periodic maintenance procedures specified in the
manual referred to in Sec.  53.4(b)(3). If a new block is to
immediately follow a previous block, such adjustments or servicing may
be done immediately after completion of the day's tests for the last
day of the previous block and at the voltage and temperature specified
for that day, but only on test days 3, 6, 9, and 12.

    Note to Sec.  53.23(e)(7): If necessary, the beginning of the
test days succeeding such maintenance or adjustment may be delayed
as required to complete the service or adjustment operation.

    (8) All measurement response readings to be recorded shall be
converted to concentration units or adjusted (if necessary) according
to the calibration curve. Whenever a test atmosphere is to be measured
but a stable reading is not required, the test atmosphere shall be
sampled and measured long enough to cause a change in measurement
response of at least 10% of full scale. Identify all readings and other
pertinent data on the strip chart (or equivalent test data record).
(See Figure B-1 to subpart B of part 53 illustrating the pattern of the
required readings.)
    (9) Test procedure. (i) Arrange to generate pollutant test
atmospheres as follows. Test atmospheres A0, A20,
and A80 shall be maintained consistent during the tests and
reproducible from test day to test day.

------------------------------------------------------------------------
                                               Pollutant concentration
              Test atmosphere                         (percent)
------------------------------------------------------------------------
A0........................................  Zero air.
A20.......................................  20  5 of the
                                             upper range limit.
A30.......................................  30  5 of the
                                             upper range limit.
A80.......................................  80  5 of the
                                             upper range limit.
A90.......................................  90  5 of the
                                             upper range limit.
------------------------------------------------------------------------

     (ii) For steps within paragraphs (e)(9)(xxv) through (e)(9)(xxxi)
of this section, a chart speed of at least 10 centimeters per hour (or
equivalent resolution for a digital representation) shall be used to
clearly show changes in measurement responses. The actual chart speed,
chart speed changes, and time checks shall be clearly marked on the
chart.
    (iii) Test day 0. Allow sufficient time for the test analyzer to
warm up and stabilize at a line voltage of 115 volts and a room
temperature of 25 [deg]C. Adjust the zero baseline to 5 percent of
chart (see Sec.  53.21(b)) and recalibrate, if necessary. No further
adjustments shall be made to the analyzer until the end of the tests on
the third, sixth, ninth, or twelfth test day.
    (iv) Measure test atmosphere A0 until a stable
measurement reading is obtained and record this reading (in ppm) as
Z'n, where n = 0 (see Figure B-4 in appendix A of this subpart).
    (v) [Reserved.]
    (vi) Measure test atmosphere A80. Allow for a stable
measurement reading and record it as S'n, where n = 0.
    (vii) The above readings for Z'0 and S'0
should be taken at least four (4) hours prior to the beginning of test
day 1.
    (viii) At the beginning of each test day, adjust the line voltage
and room temperature to the values given in table B-4 to subpart B of
part 53 (or to the corresponding alternative temperature if a wider
temperature range is being tested).
    (ix) Measure test atmosphere A0 continuously for at
least twelve (12) continuous hours during each test day.
    (x) After the 12-hour zero drift test (step ix) is complete, sample
test atmosphere A0. A stable reading is not required.
    (xi) Measure test atmosphere A20 and record the stable
reading (in ppm) as P1. (See Figure B-4 in appendix A.)
    (xii) Sample test atmosphere A30; a stable reading is
not required.
    (xiii) Measure test atmosphere A20 and record the stable
reading as P2.
    (xiv) Sample test atmosphere A0; a stable reading is not
required.
    (xv) Measure test atmosphere A20 and record the stable
reading as P3.
    (xvi) Sample test atmosphere A30; a stable reading is
not required.
    (xvii) Measure test atmosphere A20 and record the stable
reading as P4.
    (xviii) Sample test atmosphere A0; a stable reading is
not required.
    (xix) Measure test atmosphere A20 and record the stable
reading as P5.
    (xx) Sample test atmosphere A30; a stable reading is not
required.
    (xxi) Measure test atmosphere A20 and record the stable
reading as P6.
    (xxii) Measure test atmosphere A80 and record the stable
reading as P7.
    (xxiii) Sample test atmosphere A90; a stable reading is
not required.
    (xxiv) Measure test atmosphere A80 and record the stable
reading as P8. Increase the chart speed to at least 10
centimeters per hour.
    (xxv) Measure test atmosphere A0. Record the stable
reading as L1.
    (xxvi) Quickly switch the test analyzer to measure test atmosphere
A80 and mark the recorder chart to show, or otherwise
record, the exact time when the switch occurred.
    (xxvii) Measure test atmosphere A80 and record the
stable reading as P9.
    (xxviii) Sample test atmosphere A90; a stable reading is
not required.
    (xxix) Measure test atmosphere A80 and record the stable
reading as P10.
    (xxx) Measure test atmosphere A0 and record the stable
reading as L2.
    (xxxi) Measure test atmosphere A80 and record the stable
reading as P11.
    (xxxii) Sample test atmosphere A90; a stable reading is
not required.
    (xxxiii) Measure test atmosphere A80 and record the
stable reading as P12.
    (xxxiv) Repeat steps within paragraphs (e)(9)(viii) through
(e)(9)(xxxiii) of this section, each test day.
    (xxxv) If zero and span adjustments are made after the readings are
taken on

test days 3, 6, 9, or 12, complete all adjustments; then measure test
atmospheres A0 and A80. Allow for a stable
reading on each, and record the readings as Z'n and S'n, respectively,
where n = the test day number (3, 6, 9, or 12). These readings must be
made at least 4 hours prior to the start of the next test day.
    (10) Determine the results of each day's tests as follows. Mark the
recorder chart to show readings and determinations.
    (i) Zero drift. (A) Determine the 12-hour zero drift by examining
the strip chart pertaining to the 12-hour continuous zero air test.
Determine the minimum (Cmin.) and maximum (Cmax.) measurement readings
(in ppm) during this period of 12 consecutive hours, extrapolating the
calibration curve to negative concentration units if necessary.
Calculate the 12-hour zero drift (12ZD) as 12ZD = Cmax. - Cmin. (See
Figure B-5 in appendix A.)
    (B) Calculate the 24-hour zero drift (24ZD) for the n-th test day
as 24ZDn = Zn - Zn-1, or 24ZDn = Zn - Z'n-1 if zero adjustment was made
on the previous test day, where Zn = \1/2\(L1+L2)
for L1 and L2 taken on the n-th test day.
    (C) Compare 12ZD and 24ZD to the zero drift limit specifications in
table B-1 to subpart B of part 53. Both 12ZD and 24ZD must be within
the specified limits (inclusive) to pass the test for zero drift.
    (ii) Span drift.
    (A) Calculate the span drift (SD) as:
    [GRAPHIC] [TIFF OMITTED] TR31AU11.006

or if a span adjustment was made on the previous test day,
[GRAPHIC] [TIFF OMITTED] TR31AU11.007

where
[GRAPHIC] [TIFF OMITTED] TR31AU11.008

n indicates the n-th test day, and i indicates the i-th measurement
reading on the n-th test day.
    (B) SD must be within the span drift limits (inclusive) specified
in table B-1 to subpart B of part 53 to pass the test for span drift.
    (iii) Lag time. Determine, from the strip chart (or alternative
test data record), the elapsed time in minutes between the change in
test concentration (or mark) made in step (xxvi) and the first
observable (two times the noise level) measurement response. This time
must be equal to or less than the lag time limit specified in table B-1
to subpart B of part 53 to pass the test for lag time.
    (iv) Rise time. Calculate 95 percent of measurement reading
P9 and determine, from the recorder chart (or alternative
test data record), the elapsed time between the first observable (two
times noise level) measurement response and a response equal to 95
percent of the P9 reading. This time must be equal to or
less than the rise time limit specified in table B-1 to subpart B of
part 53 to pass the test for rise time.
    (v) Fall time. Calculate five percent of (P10 -
L2) and determine, from the strip chart (or alternative test
record), the elapsed time in minutes between the first observable
decrease in measurement response following reading P10 and a
response equal to L2 + five percent of (P10 -
L2). This time must be equal to or less than the fall time
limit specification in table B-1 to subpart B of part 53 to pass the
test for fall time.
    (vi) Precision. Calculate precision (both P20 and
P80) for each test day as follows:
    (A)
    [GRAPHIC] [TIFF OMITTED] TR31AU11.009

    (B)
    [GRAPHIC] [TIFF OMITTED] TR31AU11.010

    (C) Both P20 and P80 must be equal to or less
than the precision limits specified in table B-1 to subpart B of part
53 to pass the test for precision.

BILLING CODE 6560-50-P

Figure B-1 to Subpart B of Part 53--Example
[GRAPHIC] [TIFF OMITTED] TR31AU11.011

[GRAPHIC] [TIFF OMITTED] TR31AU11.012

BILLING CODE 6560-50-C

           Table B-2 to Subpart B of Part 53--Test Atmospheres
------------------------------------------------------------------------
          Test gas                 Generation           Verification
------------------------------------------------------------------------
Ammonia.....................  Permeation device.    Indophenol method,
                               Similar to system     reference 3.
                               described in
                               references 1 and 2.
Carbon dioxide..............  Cylinder of zero air  Use NIST-certified
                               or nitrogen           standards whenever
                               containing CO2 as     possible. If NIST
                               required to obtain    standards are not
                               the concentration     available, obtain 2
                               specified in table    standards from
                               B-3.                  independent sources
                                                     which agree within
                                                     2 percent, or
                                                     obtain one standard
                                                     and submit it to an
                                                     independent
                                                     laboratory for
                                                     analysis, which
                                                     must agree within 2
                                                     percent of the
                                                     supplier's nominal
                                                     analysis.
Carbon monoxide.............  Cylinder of zero air  Use an FRM CO
                               or nitrogen           analyzer as
                               containing CO as      described in
                               required to obtain    reference 8.
                               the concentration
                               specified in table
                               B-3.
Ethane......................  Cylinder of zero air  Gas chromatography,
                               or nitrogen           ASTM D2820,
                               containing ethane     reference 10. Use
                               as required to        NIST-traceable
                               obtain the            gaseous methane or
                               concentration         propane standards
                               specified in table    for calibration.
                               B-3.
Ethylene....................  Cylinder of pre-      Do.
                               purified nitrogen
                               containing ethylene
                               as required to
                               obtain the
                               concentration
                               specified in table
                               B-3.
Hydrogen chloride...........  Cylinder \1\ of pre-  Collect samples in
                               purified nitrogen     bubbler containing
                               containing            distilled water and
                               approximately 100     analyze by the
                               ppm of gaseous HCl.   mercuric
                               Dilute with zero      thiocyanate method,
                               air to                ASTM (D612), p. 29,
                               concentration         reference 4.
                               specified in table
                               B-3.
Hydrogen sulfide............  Permeation device     Tentative method of
                               system described in   analysis for H2S
                               references 1 and 2.   content of the
                                                     atmosphere, p. 426,
                                                     reference 5.
Methane.....................  Cylinder of zero air  Gas chromatography
                               containing methane    ASTM D2820,
                               as required to        reference 10. Use
                               obtain the            NIST-traceable
                               concentration         methane standards
                               specified in table    for calibration.
                               B-3.
Nitric oxide................  Cylinder \1\ of pre-  Gas phase titration
                               purified nitrogen     as described in
                               containing            reference 6,
                               approximately 100     section 7.1.
                               ppm NO. Dilute with
                               zero air to
                               required
                               concentration.
Nitrogen dioxide............  1. Gas phase          1. Use an FRM NO2
                               titration as          analyzer calibrated
                               described in          with a
                               reference 6.          gravimetrically
                              2. Permeation          calibrated
                               device, similar to    permeation device.
                               system described in  2. Use an FRM NO2
                               reference 6.          analyzer calibrated
                                                     by gas-phase
                                                     titration as
                                                     described in
                                                     reference 6.
Ozone.......................  Calibrated ozone      Use an FEM ozone
                               generator as          analyzer calibrated
                               described in          as described in
                               reference 9.          reference 9.

Sulfur dioxide..............  1. Permeation device  Use an SO2 FRM or
                               as described in       FEM analyzer as
                               references 1 and 2.   described in
                              2. Dynamic dilution    reference 7.
                               of a cylinder
                               containing
                               approximately 100
                               ppm SO2 as
                               described in
                               Reference 7.
Water.......................  Pass zero air         Measure relative
                               through distilled     humidity by means
                               water at a fixed      of a dew-point
                               known temperature     indicator,
                               between 20[deg] and   calibrated
                               30 [deg]C such that   electrolytic or
                               the air stream        piezo electric
                               becomes saturated.    hygrometer, or wet/
                               Dilute with zero      dry bulb
                               air to                thermometer.
                               concentration
                               specified in table
                               B-3.
Xylene......................  Cylinder of pre-      Use NIST-certified
                               purified nitrogen     standards whenever
                               containing 100 ppm    possible. If NIST
                               xylene. Dilute with   standards are not
                               zero air to           available, obtain 2
                               concentration         standards from
                               specified in table    independent sources
                               B-3.                  which agree within
                                                     2 percent, or
                                                     obtain one standard
                                                     and submit it to an
                                                     independent
                                                     laboratory for
                                                     analysis, which
                                                     must agree within 2
                                                     percent of the
                                                     supplier's nominal
                                                     analysis.
Zero air....................  1. Ambient air
                               purified by
                               appropriate
                               scrubbers or other
                               devices such that
                               it is free of
                               contaminants likely
                               to cause a
                               detectable response
                               on the analyzer.
                              2. Cylinder of
                               compressed zero air
                               certified by the
                               supplier or an
                               independent
                               laboratory to be
                               free of
                               contaminants likely
                               to cause a
                               detectable response
                               on the analyzer.
------------------------------------------------------------------------
\1\ Use stainless steel pressure regulator dedicated to the pollutant
  measured.
Reference 1. O'Keefe, A. E., and Ortaman, G. C. ``Primary Standards for
  Trace Gas Analysis,'' Anal. Chem. 38, 760 (1966).
Reference 2. Scaringelli, F. P., A. E. . Rosenberg, E*, and Bell, J. P.,
  ``Primary Standards for Trace Gas Analysis.'' Anal. Chem. 42, 871
  (1970).
Reference 3. ``Tentative Method of Analysis for Ammonia in the
  Atmosphere (Indophenol Method)'', Health Lab Sciences, vol. 10, No. 2,
  115-118, April 1973.
Reference 4. 1973 Annual Book of ASTM Standards, American Society for
  Testing and Materials, 1916 Race St., Philadelphia, PA.
Reference 5. Methods for Air Sampling and Analysis, Intersociety
  Committee, 1972, American Public Health Association, 1015.
Reference 6. 40 CFR 50 Appendix F, ``Measurement Principle and
  Calibration Principle for the Measurement of Nitrogen Dioxide in the
  Atmosphere (Gas Phase Chemiluminescence).''
Reference 7. 40 CFR 50 Appendix A-1, ``Measurement Principle and
  Calibration Procedure for the Measurement of Sulfur Dioxide in the
  Atmosphere (Ultraviolet FIuorscence).''
Reference 8. 40 CFR 50 Appendix C, ``Measurement Principle and
  Calibration Procedure for the Measurement of Carbon Monoxide in the
  Atmosphere (Non-Dispersive Infrared Photometry)''.
Reference 9. 40 CFR 50 Appendix D, ``Measurement Principle and
  Calibration Procedure for the Measurement of Ozone in the
  Atmosphere''.
Reference 10. ``Standard Test Method for C, through C5 Hydrocarbons in
  the Atmosphere by Gas Chromatography'', D 2820, 1987 Annual Book of
  Aston Standards, vol 11.03, American Society for Testing and
  Materials, 1916 Race St., Philadelphia, PA 19103.

                                                     Table B-3 to Subpart B of Part 53--Interferent Test Concentration,\1\ Parts per Million
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                          Hydro-
     Pollutant         Analyzer type      chloric   Ammonia  Hydrogen   Sulfur   Nitrogen   Nitric    Carbon   Ethylene    Ozone    Mxylene    Water    Carbon    Methane   Ethane   Naphthalene
                                           acid               sulfide   dioxide   dioxide    oxide    dioxide                                  vapor   monoxide
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
SO2...............  Ultraviolet          ........  ........   \5\ 0.1  \4\ 0.14       0.5       0.5  ........  ........       0.5       0.2    20,000  ........  ........  ........    \6\ 0.05
                     fluorescence.
SO2...............  Flame photometric..  ........  ........      0.01  \4\ 0.14  ........  ........       750  ........  ........  ........       \3\        50  ........  ........  ...........
                                                                                20,000
SO2...............  Gas chromatography.  ........  ........       0.1  \4\ 0.14  ........  ........       750  ........  ........  ........       \3\        50  ........  ........  ...........
                                                                                20,000
SO2...............  Spectrophotometric-       0.2       0.1       0.1  \4\ 0.14       0.5  ........       750  ........       0.5  ........  ........  ........  ........  ........  ...........
                     wet chemical
                     (pararosanaline).
SO2...............  Electrochemical....       0.2       0.1       0.1  \4\ 0.14       0.5       0.5  ........       0.2       0.5  ........       \3\  ........  ........  ........  ...........
                                                                                20,000
SO2...............  Conductivity.......       0.2       0.1  ........  \4\ 0.14       0.5  ........       750  ........  ........  ........  ........  ........  ........  ........  ...........
SO2...............  Spectrophotometric-  ........  ........  ........  \4\ 0.14       0.5  ........  ........  ........       0.5       0.2  ........  ........  ........  ........  ...........
                     gas phase,
                     including DOAS.
O3................  Chemiluminescent...  ........  ........   \3\ 0.1  ........  ........  ........       750  ........  \4\ 0.08  ........       \3\  ........  ........  ........  ...........
                                                                                20,000
O3................  Electrochemical....  ........   \3\ 0.1  ........       0.5       0.5  ........  ........  ........  \4\ 0.08  ........  ........  ........  ........  ........  ...........
O3................  Spectrophotometric-  ........   \3\ 0.1  ........       0.5       0.5   \3\ 0.5  ........  ........  \4\ 0.08  ........  ........  ........  ........  ........  ...........
                     wet chemical
                     (potassium iodide).
O3................  Spectrophotometric-  ........  ........  ........       0.5       0.5       0.5  ........  ........  \4\ 0.08      0.02    20,000  ........  ........  ........  ...........
                     gas phase,
                     including
                     ultraviolet
                     absorption and
                     DOAS).
CO................  Non-dispersive       ........  ........  ........  ........  ........  ........       750  ........  ........  ........    20,000    \4\ 10  ........  ........  ...........
                     Infrared.
CO................  Gas chromatography   ........  ........  ........  ........  ........  ........  ........  ........  ........  ........    20,000    \4\ 10  ........       0.5  ...........
                     with flame
                     ionization
                     detector.
CO................  Electrochemical....  ........  ........  ........  ........  ........       0.5  ........       0.2  ........  ........    20,000    \4\ 10  ........  ........  ...........
CO................  Catalytic            ........       0.1  ........  ........  ........  ........       750       0.2  ........  ........    20,000    \4\ 10       5.0       0.5  ...........
                     combustion-thermal
                     detection.
CO................  IR fluorescence....  ........  ........  ........  ........  ........  ........       750  ........  ........  ........    20,000    \4\ 10  ........       0.5  ...........
CO................  Mercury replacement- ........  ........  ........  ........  ........  ........  ........       0.2  ........  ........  ........    \4\ 10  ........       0.5  ...........
                     UV photometric.
NO2...............  Chemiluminescent...  ........   \3\ 0.1  ........       0.5   \4\ 0.1       0.5  ........  ........  ........  ........    20,000  ........  ........  ........  ...........
NO2...............  Spectrophotometric-  ........  ........  ........       0.5   \4\ 0.1       0.5       750  ........       0.5  ........  ........  ........  ........  ........  ...........
                     wet chemical (azo-
                     dye reaction).
NO2...............  Electrochemical....       0.2   \3\ 0.1  ........       0.5   \4\ 0.1       0.5       750  ........       0.5  ........    20,000        50  ........  ........  ...........
NO2...............  Spectrophotometric-  ........   \3\ 0.1  ........       0.5   \4\ 0.1       0.5  ........  ........       0.5  ........    20,000        50  ........  ........  ...........
                     gas phase.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ Concentrations of interferent listed must be prepared and controlled to 10 percent of the stated value.
\2\ Analyzer types not listed will be considered by the Administrator as special cases.
\3\ Do not mix with the pollutant.
\4\ Concentration of pollutant used for test. These pollutant concentrations must be prepared to 10 percent of the stated value.
\5\ If candidate method utilizes an elevated-temperature scrubber for removal of aromatic hydrocarbons, perform this interference test.
\6\ If naphthalene test concentration cannot be accurately quantified, remove the scrubber, use a test concentration that causes a full scale response, reattach the scrubber, and evaluate
  response for interference.

              Table B-4 to Subpart B of Part 53--Line Voltage and Room Temperature Test Conditions
----------------------------------------------------------------------------------------------------------------
                                                                   Room
                 Test day                        Line         temperature,\2\               Comments
                                            voltage,\1\ rms       [deg]C
----------------------------------------------------------------------------------------------------------------
0........................................               115                25  Initial set-up and adjustments.
1........................................               125                20  .................................
2........................................               105                20  .................................
3........................................               125                30  Adjustments and/or periodic
                                                                                maintenance permitted at end of
                                                                                tests.
4........................................               105                30  .................................
5........................................               125                20  .................................
6........................................               105                20  Adjustments and/or periodic
                                                                                maintenance permitted at end of
                                                                                tests.
7........................................               125                30  Examine test results to ascertain
                                                                                if further testing is required.
8........................................               105                30  .................................
9........................................               125                20  Adjustments and/or periodic
                                                                                maintenance permitted at end of
                                                                                tests.
10.......................................               105                20  .................................
11.......................................               125                30  .................................
12.......................................               105                30  Adjustments and/or periodic
                                                                                maintenance permitted at end of
                                                                                tests.
13.......................................               125                20  .................................
14.......................................               105                20  .................................
15.......................................               125                30  .................................
----------------------------------------------------------------------------------------------------------------
\1\ Voltage specified shall be controlled to  1 volt.
\2\ Temperatures shall be controlled to  1 [deg]C.

Table B-5 to Subpart B of Part 53--Symbols and Abbreviations

BL--Analyzer reading at the specified LDL test concentration for the
LDL test.
BZ--analyzer reading at 0 concentration for the LDL test.
DM--Digital meter.
Cmax--Maximum analyzer reading during the 12ZD test period.
Cmin--Minimum analyzer reading during the 12ZD test period.
i--Subscript indicating the i-th quantity in a series.
IE--Interference equivalent.
L1--First analyzer zero reading for the 24ZD test.
L2--Second analyzer zero reading for the 24ZD test.
n--Subscript indicating the test day number.
P--Analyzer reading for the span drift and precision tests.
Pi--The i-th analyzer reading for the span drift and precision
tests.
P20--Precision at 20 percent of URL.
P80--Precision at 80 percent of URL.
ppb--Parts per billion of pollutant gas (usually in air), by volume.
ppm--Parts per million of pollutant gas (usually in air), by volume.
R--Analyzer reading of pollutant alone for the IE test.
R1--Analyzer reading with interferent added for the IE
test.
ri--the i-th analyzer or DM reading for the noise test.
S--Standard deviation of the noise test readings.
S0--Noise value (S) measured at 0 concentration.
S80--Noise value (S) measured at 80 percent of the URL.
Sn--Average of P7 . . . P12 for the n-th test
day of the SD test.
S'n--Adjusted span reading on the n-th test day.
SD--Span drift
URL--Upper range limit of the analyzer's measurement range.
Z--Average of L1 and L2 readings for the 24ZD
test.
Zn--Average of L1 and L2 readings on the n-th
test day for the 24ZD test.
Z'n--Adjusted analyzer zero reading on the n-the test day for the
24ZD test.
ZD--Zero drift.
12ZD--12-hour zero drift.
24ZD--24-hour zero drift.

Appendix A to Subpart B of Part 53--Optional Forms for Reporting Test
Results

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BILLING CODE 6560-50-C

PART 58--AMBIENT AIR QUALITY SURVEILLANCE

0
5. The authority citation for part 58 continues to read as follows:

    Authority: 42 U.S.C. 7403, 7410, 7601(a), 7611, and 7619.

Subpart B--[Amended]

0
6. Section 58.10, is amended by adding paragraph (a)(7) to read as
follows:

Sec.  58.10  Annual monitoring network plan and periodic network
assessment.

    (a) * * *
    (7) A plan for establishing CO monitoring sites in accordance with
the requirements of appendix D to this part shall be submitted to the
EPA Regional Administrator. Plans for required CO monitors shall be
submitted at least six months prior to the date such monitors must be
established as required by section 58.13.
* * * * *

0
7. Section 58.13 is amended by adding paragraph (e) to read as follows:

Sec.  58.13  Monitoring network completion.

* * * * *
    (e) The CO monitors required under Appendix D, section 4.2 of this
part must be physically established and operating under all of the
requirements of this part, including the requirements of appendices A,
C, D, and E to this part, no later than:
    (1) January 1, 2015 for CO monitors in CBSAs having 2.5 million
persons or more; or
    (2) January 1, 2017 for other CO monitors.

0
8. Appendix D to Part 58 is amended by revising section 4.2 to read as
follows:

Appendix D to Part 58--Network Design Criteria for Ambient Air Quality
Monitoring

* * * * *

4.2 Carbon Monoxide (CO) Design Criteria

    4.2.1 General Requirements. (a) Except as provided in subsection
(b), one CO monitor is required to operate collocated with one
required near-road NO2 monitor, as required in Section
4.3.2 of this part, in CBSAs having a population of 1,000,000 or
more persons. If a CBSA has more than one required near-road
NO2 monitor, only one CO monitor is required to be
collocated with a near-road NO2 monitor within that CBSA.
    (b) If a state provides quantitative evidence demonstrating that
peak ambient CO concentrations would occur in a near-road location
which meets microscale siting criteria in Appendix E of this part
but is not a near-road NO2 monitoring site, then the EPA
Regional Administrator may approve a request by a state to use such
an alternate near-road location for a CO monitor in place of
collocating a monitor at near-road NO2 monitoring site.
    4.2.2 Regional Administrator Required Monitoring. (a) The
Regional Administrators, in collaboration with states, may require
additional CO monitors above the minimum number of monitors required
in 4.2.1 of this part, where the minimum monitoring requirements are
not sufficient to meet monitoring objectives. The Regional
Administrator may require, at his/her discretion, additional
monitors in situations where data or other information suggest that
CO concentrations may be approaching or exceeding the NAAQS. Such
situations include, but are not limited to, (1) characterizing
impacts on ground-level concentrations due to stationary CO sources,
(2) characterizing CO concentrations in downtown areas or urban
street canyons, and (3) characterizing CO concentrations in areas
that are subject to high ground level CO concentrations particularly
due to or enhanced by topographical and meteorological impacts. The
Regional Administrator and the responsible State or local air
monitoring agency shall work together to design and maintain the
most appropriate CO network to address the data needs for an area,
and include all monitors under this provision in the annual
monitoring network plan.
    4.2.3 CO Monitoring Spatial Scales. (a) Microscale and middle
scale measurements are the most useful site classifications for CO
monitoring sites since most people have the potential for exposure
on these scales. Carbon monoxide maxima occur primarily in areas
near major roadways and intersections with high traffic density and
often in areas with poor atmospheric ventilation.
    (1) Microscale--Microscale measurements typically represent
areas in close proximity to major roadways, within street canyons,
over sidewalks, and in some cases, point and area sources. Emissions
on roadways result in high ground level CO concentrations at the
microscale, where concentration gradients generally exhibit a marked
decrease with increasing downwind distance from major roads, or
within downtown areas including urban street canyons. Emissions from
stationary point and area sources, and non-road sources may, under
certain plume conditions, result in high ground level concentrations
at the microscale.
    (2) Middle scale--Middle scale measurements are intended to
represent areas with dimensions from 100 meters to 0.5 kilometer. In
certain cases, middle scale measurements may apply to areas that
have a total length of several kilometers, such as ``line'' emission
source areas. This type of emission sources areas would include air
quality along a commercially developed street or shopping plaza,
freeway corridors, parking lots and feeder streets.
    (3) Neighborhood scale--Neighborhood scale measurements are
intended to represent areas with dimensions from 0.5 kilometers to 4
kilometers. Measurements of CO in this category would represent
conditions throughout some reasonably urban sub-regions. In some
cases, neighborhood scale data may represent not only the immediate
neighborhood spatial area, but also other similar such areas across
the larger urban area. Neighborhood scale measurements provide
relative area-wide concentration data which are useful for providing
relative urban background concentrations, supporting health and
scientific research, and for use in modeling.
* * * * *

0
9. Appendix E to Part 58 is amended by revising sections 2 and 6.2(a),
6.2(b), 6.2(c), and Table E-4 to read as follows:

Appendix E to Part 58--Probe and Monitoring Path Siting Criteria for
Ambient Air Quality Monitoring

* * * * *

2. Horizontal and Vertical Placement

    The probe or at least 80 percent of the monitoring path must be
located between 2 and 15 meters above ground level for all
O3 and SO2 monitoring sites, and for
neighborhood or larger spatial scale Pb, PM10,
PM10-2.5, PM2.5, NO2, and CO sites.
Middle scale PM10-2.5 sites are required to have sampler
inlets between 2 and 7 meters above ground level. Microscale Pb,
PM10, PM10-2.5, and PM2.5 sites are
required to have sampler inlets between 2 and 7 meters above ground
level. Microscale near-road NO2 monitoring sites are
required to have sampler inlets between 2 and 7 meters above ground
level. The inlet probes for microscale carbon monoxide monitors that
are being used to measure concentrations near roadways must be
between 2 and 7 meters above ground level. Those inlet probes for
microscale carbon monoxide monitors measuring concentrations near
roadways in downtown areas or urban street canyons must be between
2.5 and 3.5 meters above ground level. The probe or at least 90
percent of the monitoring path must be at least 1 meter vertically
or horizontally away from any supporting structure, walls, parapets,
penthouses, etc., and away from dusty or dirty areas. If the probe
or a significant portion of the monitoring path is located near the
side of a building or wall, then it should be located on the
windward side of the building relative to the prevailing wind
direction during the season of highest concentration potential for
the pollutant being measured.
* * * * *
    6. * * *
    6.2 Spacing for Carbon Monoxide Probes and Monitoring Paths. (a)
Near-road microscale CO monitoring sites, including those located in
downtown areas, urban street canyons, and other near-road locations
such as those adjacent to highly trafficked roads, are intended to
provide a measurement of the influence of the immediate source on
the pollution exposure on the adjacent area.
    (b) Microscale CO monitor inlets probes in downtown areas or
urban street canyon locations shall be located a minimum distance of
2 meters and a maximum distance of 10 meters from the edge of the
nearest traffic lane.
    (c) Microscale CO monitor inlet probes in downtown areas or
urban street canyon locations shall be located at least 10 meters
from an intersection and preferably at a midblock location. Midblock
locations are preferable to intersection locations because
intersections represent a much smaller portion of downtown space
than do the streets between them. Pedestrian exposure is probably
also greater in street canyon/corridors than at intersections.
    (d) Microscale CO monitor inlet probes in the near-road
environment, outside of downtown areas or urban street canyons,
shall be as near as practicable to the outside nearest edge of the
traffic lanes of the target road segment; but shall not be located
at a distance greater than 50 meters, in the horizontal, from the
outside nearest edge of the traffic lanes of the target road
segment.
    (e) In determining the minimum separation between a neighborhood
scale monitoring site and a specific roadway, the presumption is
made that measurements should not be substantially influenced by any
one roadway. Computations were made to determine the separation
distance, and Table E-2 of this appendix provides the required
minimum separation distance between roadways and a probe or 90
percent of a monitoring path. Probes or monitoring paths that are
located closer to roads than this criterion allows should not be
classified as neighborhood scale, since the measurements from such a
site would closely represent the middle scale. Therefore, sites not
meeting this criterion should be classified as middle scale.
* * * * *

                                Table E-4 of Appendix E to Part 58--Summary of Probe and Monitoring Path Siting Criteria
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                Horizontal and
                                                                                vertical distance
                                         Scale (maximum       Height from ground to     from supporting      Distance from trees       Distance from
             Pollutant                   monitoring path     probe, inlet or 80% of    structures \2\ to      to probe, inlet or     roadways to probe,
                                       length, meters) \1\     monitoring path \1\    probe, inlet or 90%     90% of monitoring     inlet or monitoring
                                                                                of monitoring path     path \1\ (meters)      path \1\ (meters)
                                                                                \1\ (meters)
--------------------------------------------------------------------------------------------------------------------------------------------------------
SO2 \3\ \4\ \5\ \6\................  Middle (300 m)          2-15..................  > 1..................  > 10.................  N/A.
                                      Neighborhood Urban,
                                      and Regional (1 km).
CO \4\ \5\ \7\.....................  Micro [downtown or      2.5-3.5; 2-7; 2-15....  > 1..................  > 10.................  2-10 for downtown
                                      street canyon sites],                                                                         areas or street
                                      micro [near-road                                                                              canyon microscale;
                                      sites], middle (300                                                                           50 for near-road
                                      m) and Neighborhood                                                                           microscale; see
                                      (1 km).                                                                                Table E-2 of this
                                                                                appendix for middle
                                                                                and neighborhood
                                                                                scales.
O3 \3\ \4\ \5\.....................  Middle (300 m)          2-15..................  > 1..................  > 10.................  See Table E-1 of this
                                      Neighborhood, Urban,                                                                          appendix for all
                                      and Regional (1 km).                                                                          scales.
NO2 \3\ \4\ \5\....................  Micro (Near-road [50-   2-7 (micro); 2-15 (all  > 1..................  > 10.................  50 meters for near-
                                      300]) Middle (300m)     other scales).                                                        road microscale;
                                      Neighborhood, Urban,                                                                         See Table E-1 of this
                                      and Regional (1 km).                                                                          appendix for all
                                                                                other scales.
Ozone precursors (for PAMS) \3\ \4\  Neighborhood and Urban  2-15..................  > 1..................  > 10.................  See Table E-4 of this
 \5\.                                 (1 km).                                                                                appendix for all
                                                                                scales.
PM, Pb 3 4 5 6 8...................  Micro: Middle,          2-7 (micro); 2-7        > 2 (all scales,       > 10 (all scales)....  2-10 (micro); see
                                      Neighborhood, Urban     (middle PM10	2.5); 2-   horizontal distance                           Figure E-1 of this
                                      and Regional.           15 (all other scales).  only).                                        appendix for all
                                                                                other scales.
--------------------------------------------------------------------------------------------------------------------------------------------------------
N/A--Not applicable.
\1\ Monitoring path for open path analyzers is applicable only to middle or neighborhood scale CO monitoring, middle, neighborhood, urban, and regional
  scale NO2 monitoring, and all applicable scales for monitoring SO2,O3, and O3 precursors.
\2\ When probe is located on a rooftop, this separation distance is in reference to walls, parapets, or penthouses located on roof.
\3\ Should be > 20 meters from the drip-line of tree(s) and must be 10 meters from the drip-line when the tree(s) act as an obstruction.
\4\ Distance from sampler, probe, or 90% of monitoring path to obstacle, such as a building, must be at least twice the height the obstacle protrudes
  above the sampler, probe, or monitoring path. Sites not meeting this criterion may be classified as middle scale (see text).
\5\ Must have unrestricted airflow 270 degrees around the probe or sampler; 180 degrees if the probe is on the side of a building or a wall.
\6\ The probe, sampler, or monitoring path should be away from minor sources, such as furnace or incineration flues. The separation distance is
  dependent on the height of the minor source's emission point (such as a flue), the type of fuel or waste burned, and the quality of the fuel (sulfur,
  ash, or lead content). This criterion is designed to avoid undue influences from minor sources.
\7\ For microscale CO monitoring sites in downtown areas or street canyons (not at near-road NO2 monitoring sites), the probe must be > 10 meters from a
  street intersection and preferably at a midblock location.
\8\ Collocated monitors must be within 4 meters of each other and at least 2 meters apart for flow rates greater than 200 liters/min or at least 1 meter
  apart for samplers having flow rates less than 200 liters/min to preclude airflow interference.

* * * * *
[FR Doc. 2011-21359 Filed 8-30-11; 8:45 am]
BILLING CODE 6560-50-P


[Federal Register Volume 85, Number 29 (Wednesday, February 12, 2020)]
[Notices]
[Pages 7998-7999]
[FR Doc No: 2020-02801]

=======================================================================
-----------------------------------------------------------------------

ENVIRONMENTAL PROTECTION AGENCY

[FRL-10005-38-OAR]

Allocations of Cross-State Air Pollution Rule Allowances From New
Unit Set-Asides for 2019 Control Periods

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice of data availability.

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

SUMMARY: The Environmental Protection Agency (EPA) is providing notice
of the availability of data on emission allowance allocations to
certain units under the Cross-State Air Pollution Rule (CSAPR) trading
programs. EPA has completed final calculations for the second round of
allocations of allowances from the CSAPR new unit set-asides (NUSAs)
for the 2019 control periods and has posted spreadsheets containing the
calculations on EPA's website. EPA has also completed calculations for
allocations of the remaining 2019 NUSA allowances to existing units and
has posted spreadsheets containing those calculations on EPA's website
as well.

DATES: February 12, 2020.

FOR FURTHER INFORMATION CONTACT: Questions concerning this action
should be addressed to Jason Kuhns at<PHONE_NUMBER> or
<EMAIL_ADDRESS>or Andrew Reighart at<PHONE_NUMBER> or
<EMAIL_ADDRESS>
SUPPLEMENTARY INFORMATION: Under each CSAPR trading program where EPA
is responsible for determining emission allowance allocations, a
portion of each state's emissions budget for the program for each
control period is reserved in a NUSA (and in an additional Indian
country NUSA in the case of states with Indian country within their
borders) for allocation to certain units that would not otherwise
receive allowance allocations. The procedures for identifying the
eligible units for each control period and for allocating allowances
from the NUSAs and Indian country NUSAs to these units are set forth in
the CSAPR trading program regulations at 40 CFR 97.411(b) and 97.412
(NOX Annual), 97.511(b) and 97.512 (NOX Ozone
Season Group 1), 97.611(b) and 97.612 (SO2 Group 1),
97.711(b) and 97.712 (SO2 Group 2), and 97.811(b) and 97.812
(NOX Ozone

Season Group 2). Each NUSA allowance allocation process involves up to
two rounds of allocations to eligible units, termed ``new'' units,
followed by the allocation to ``existing'' units of any allowances not
allocated to new units.
    In a notice of data availability (NODA) published in the Federal
Register on December 9, 2019 (84 FR 67265), EPA provided notice of the
preliminary identification of units eligible to receive second-round
NUSA allocations for the 2019 control periods and described the process
for submitting any objections. EPA received no objections in response
to the December 9, 2019 NODA. This NODA provides notice of EPA's
calculations of the amounts of the second-round 2019 NUSA allocations
to the previously identified eligible new units and the allocations of
the remaining allowances to existing units.
    The detailed unit-by-unit data and final allowance allocation
calculations are set forth in Excel spreadsheets titled
``CSAPR_NUSA_2019_NOx_Annual_2nd_Round_Final_Data_New_Units,''
``CSAPR_NUSA_2019_NOx_OS_2nd_Round_Final_Data_New_Units,''
``CSAPR_NUSA_2019_SO2_2nd_Round_Final_Data_New_Units,''
``CSAPR_NUSA_2019_NOx_Annual_2nd_Round_Final_Data_Existing_Units,''
``CSAPR_NUSA_2019_NOx_OS_2nd_Round_Final_Data_Existing_Units,'' and
``CSAPR_NUSA_2019_SO2_2nd_Round_Final_Data_Existing_Units'',
available on EPA's website at https://www.epa.gov/csapr/csapr-compliance-year-2019-nusa-nodas.
    EPA notes that an allocation or lack of allocation of allowances to
a given unit does not constitute a determination that CSAPR does or
does not apply to the unit. EPA also notes that under 40 CFR 97.411(c),
97.511(c), 97.611(c), 97.711(c), and 97.811(c), allocations are subject
to potential correction if a unit to which allowances have been
allocated for a given control period is not actually an affected unit
as of the start of that control period.

(Authority: 40 CFR 97.411(b), 97.511(b), 97.611(b), 97.711(b), and
97.811(b).)

    Dated: February 3, 2020.
Reid P. Harvey,
Director, Clean Air Markets Division, Office of Atmospheric Programs,
Office of Air and Radiation.
[FR Doc. 2020-02801 Filed 2-11-20; 8:45 am]
 BILLING CODE 6560-50-P


[Federal Register Volume 84, Number 81 (Friday, April 26, 2019)]
[Rules and Regulations]
[Pages 17737-17738]
[FR Doc No: 2019-08474]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 71

[Docket No. FAA-2019-0040; Airspace Docket No. 19-AGL-5]
RIN 2120-AA66

Amendment of Class E Airspace; Hamilton, OH

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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SUMMARY: This action modifies Class E airspace extending upward from
700 feet above the surface at Butler County Regional Airport-Hogan
Field, Hamilton, OH. This action is due to an airspace review caused by
the decommissioning of the Richmond VHF omnidirectional range (VOR),
which provided navigation information to the instrument procedures at
this airport, as part of the VOR Minimum Operational Network (MON)
Program. Airspace

redesign is necessary for the safety and management of instrument
flight rules (IFR) operations at this airport.

DATES: Effective 0901 UTC, August 15, 2019. The Director of the Federal
Register approves this incorporation by reference action under Title 1
Code of Federal Regulations part 51, subject to the annual revision of
FAA Order 7400.11 and publication of conforming amendments.

ADDRESSES: FAA Order 7400.11C, Airspace Designations and Reporting
Points, and subsequent amendments can be viewed online at http://www.faa.gov/air_traffic/publications/. For further information, you can
contact the Airspace Policy Group, Federal Aviation Administration, 800
Independence Avenue SW, Washington, DC 20591; telephone: (202) 267-
8783. The Order is also available for inspection at the National
Archives and Records Administration (NARA). For information on the
availability of FAA Order 7400.11C at NARA, call<PHONE_NUMBER>, or go
to https://www.archives.gov/federal-register/cfr/ibr-locations.html.
    FAA Order 7400.11, Airspace Designations and Reporting Points, is
published yearly and effective on September 15.

FOR FURTHER INFORMATION CONTACT: Jeffrey Claypool, Federal Aviation
Administration, Operations Support Group, Central Service Center, 10101
Hillwood Parkway, Fort Worth, TX 76177; telephone<PHONE_NUMBER>.

SUPPLEMENTARY INFORMATION:

Authority for This Rulemaking

    The FAA's authority to issue rules regarding aviation safety is
found in Title 49 of the United States Code. Subtitle I, Section 106
describes the authority of the FAA Administrator. Subtitle VII,
Aviation Programs, describes in more detail the scope of the agency's
authority. This rulemaking is promulgated under the authority described
in Subtitle VII, Part A, Subpart I, Section 40103. Under that section,
the FAA is charged with prescribing regulations to assign the use of
airspace necessary to ensure the safety of aircraft and the efficient
use of airspace. This regulation is within the scope of that authority
as it amends Class E airspace extending upward from 700 feet above the
surface at Butler County Regional Airport-Hogan Field, Hamilton, OH, to
support IFR operations at this airport.

History

    The FAA published a notice of proposed rulemaking in the Federal
Register (84 FR 5019; February 20, 2019) for Docket No. FAA-2019-0040
to amend Class E airspace extending upward from 700 feet above the
surface at Butler County Regional Airport-Hogan Field, Hamilton, OH.
Interested parties were invited to participate in this rulemaking
effort by submitting written comments on the proposal to the FAA. No
comments were received.
    Class E airspace designations are published in paragraph 6005 of
FAA Order 7400.11C, dated August 13, 2018, and effective September 15,
2018, which is incorporated by reference in 14 CFR 71.1. The Class E
airspace designations listed in this document will be published
subsequently in the Order.

Availability and Summary of Documents for Incorporation by Reference

    This document amends FAA Order 7400.11C, Airspace Designations and
Reporting Points, dated August 13, 2018, and effective September 15,
2018. FAA Order 7400.11C is publicly available as listed in the
ADDRESSES section of this document. FAA Order 7400.11C lists Class A,
B, C, D, and E airspace areas, air traffic service routes, and
reporting points.

The Rule

    This amendment to Title 14 Code of Federal Regulations (14 CFR)
part 71 by modifying the Class E airspace extending upward from 700
feet above the surface to within a 6.5-mile radius (reduced from a 6.9-
mile radius) of Butler County Regional Airport-Hogan Field, Hamilton,
OH.
    This action is necessary due to an airspace review caused by the
decommissioning of the Richmond VOR, which provided navigation
information for the instrument procedures at this airport, as part of
the VOR MON Program.

Regulatory Notices and Analyses

    The FAA has determined that this regulation only involves an
established body of technical regulations for which frequent and
routine amendments are necessary to keep them operationally current, is
non-controversial and unlikely to result in adverse or negative
comments. It, therefore: (1) Is not a ``significant regulatory action''
under Executive Order 12866; (2) is not a ``significant rule'' under
DOT Regulatory Policies and Procedures (44 FR 11034; February 26,
1979); and (3) does not warrant preparation of a regulatory evaluation
as the anticipated impact is so minimal. Since this is a routine matter
that only affects air traffic procedures and air navigation, it is
certified that this rule, when promulgated, does not have a significant
economic impact on a substantial number of small entities under the
criteria of the Regulatory Flexibility Act.

Environmental Review

    The FAA has determined that this action qualifies for categorical
exclusion under the National Environmental Policy Act in accordance
with FAA Order 1050.1F, ``Environmental Impacts: Policies and
Procedures,'' paragraph 5-6.5.a. This airspace action is not expected
to cause any potentially significant environmental impacts, and no
extraordinary circumstances exist that warrant preparation of an
environmental assessment.

Lists of Subjects in 14 CFR Part 71

    Airspace, Incorporation by reference, Navigation (air).

Adoption of the Amendment

    In consideration of the foregoing, the Federal Aviation
Administration amends 14 CFR part 71 as follows:

PART 71--DESIGNATION OF CLASS A, B, C, D, AND E AIRSPACE AREAS; AIR
TRAFFIC SERVICE ROUTES; AND REPORTING POINTS

0
1. The authority citation for part 71 continues to read as follows:

    Authority: 49 U.S.C. 106(f), 106(g); 40103, 40113, 40120; E.O.
10854, 24 FR 9565, 3 CFR, 1959-1963 Comp., p. 389.

Sec.  71.1  [Amended]

0
2. The incorporation by reference in 14 CFR 71.1 of FAA Order 7400.11C,
Airspace Designations and Reporting Points, dated August 13, 2018, and
effective September 15, 2018, is amended as follows:

Paragraph 6005 Class E Airspace Areas Extending Upward From 700 Feet
or More Above the Surface of the Earth.
* * * * *

AGL OH E5 Hamilton, OH [Amended]

Butler County Regional Airport-Hogan Field, OH
    (Lat. 39[deg]21'50'' N., long. 84[deg]31'19'' W)

    That airspace extending upward from 700 feet above the surface
within a 6.5-mile radius of Butler County Regional Airport-Hogan
Field.

    Issued in Fort Worth, Texas, on April 22, 2019.
John A. Witucki,
Acting Manager, Operations Support Group, ATO Central Service Center.
[FR Doc. 2019-08474 Filed 4-25-19; 8:45 am]
BILLING CODE 4910-13-P


[Federal Register Volume 86, Number 187 (Thursday, September 30, 2021)]
[Rules and Regulations]
[Pages 54074-54075]
[FR Doc No: 2021-21251]

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DEPARTMENT OF HOMELAND SECURITY

Coast Guard

33 CFR Part 165

[Docket No. USCG-2021-0728]

Safety Zone; Rio Vista Bass Derby Fireworks, Sacramento River,
Rio Vista, CA

AGENCY: Coast Guard, DHS.

ACTION: Notification of enforcement of regulation.

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SUMMARY: The Coast Guard will enforce the safety zone for the Rio Vista
Bass Derby Fireworks Display in the Captain of the Port, San Francisco
area of responsibility during the dates and times noted below. This
action is necessary to protect life and property of the maritime public
from the hazards associated with the fireworks display. During the
enforcement period, unauthorized persons or vessels are prohibited from
entering into, transiting through, or anchoring in the safety zone,
unless authorized by the Patrol Commander (PATCOM) or other federal,
state, or local law enforcement agencies on scene to assist the Coast
Guard in enforcing the regulated area.

DATES: The regulation in 33 CFR 165.1191, will be enforced for the
location in Table 1 to Sec.  165.1191, Item number 23, from noon
through 9:30 p.m. on October 9, 2021.

FOR FURTHER INFORMATION CONTACT: If you have questions about this
notification of enforcement, call or email Lieutenant Anthony Solares,
Waterways Management, U.S. Coast Guard Sector San Francisco; telephone
(415) 399-3585, email<EMAIL_ADDRESS>
SUPPLEMENTARY INFORMATION: The Coast Guard will enforce the safety zone
established in 33 CFR 165.1191 Table 1, Item number 23, for the Rio
Vista Bass Derby Fireworks Display from noon through 9:30 p.m. on
October 9, 2021.
    The safety zone will extend to all navigable waters of the
Sacramento River, from surface to bottom, within a circle formed by
connecting all points 100 feet out from the fireworks barge during the
loading, transit, and arrival of the fireworks barge from the loading
location to the display location and until the start of the fireworks
display. From 10:00 a.m. through 4:00 p.m. October 9, 2021, the
fireworks barge will load pyrotechnics from the Dutra Group, Oly Yard
615 River Road, Rio Vista, CA. The fireworks barge will remain at the
loading location until its transit to the

display location. From 7:45 p.m. to 7:55 p.m. on October 9, 2021 the
loaded fireworks barge will transit from the Dutra Group, Oly Yard 615
River Road, Rio Vista, CA to the launch site off of Rio Vista, CA in
approximate position 38[deg]09'15.53'' N, 121[deg]41'17.01'' W (NAD
83), where it will remain until the conclusion of the fireworks
display. During the 15-minute fireworks display, scheduled to begin at
approximately 8:45 p.m. on October 9, 2021, and 30 minutes after the
conclusion of the fireworks display, the safety zone will increase in
size and encompass all navigable waters of the Sacramento River, from
surface to bottom, within a circle formed by connecting all points 1000
feet out from the fireworks barge near Rio Vista, CA in approximate
position 38[deg]09'15.53'' N, 121[deg]41'17.01'' W (NAD 83). This
safety zone will be enforced from noon until 9:30 p.m. on October 9,
2021, or as announced via Broadcast Notice to Mariners.
    In addition to this notification of enforcement in the Federal
Register, the Coast Guard plans to provide notification of this
enforcement period via the Local Notice to Mariners.
    Under the provisions of 33 CFR 165.1191, unauthorized persons or
vessels are prohibited from entering into, transiting through, or
anchoring in the safety zone during all applicable effective dates and
times, unless authorized to do so by the PATCOM or other Official
Patrol defined as a federal, state, or local law enforcement agency on
scene to assist the Coast Guard in enforcing the regulated area.
Additionally, each person who receives notice of a lawful order or
direction issued by the PATCOM or Official Patrol shall obey the order
or direction. The PATCOM or Official Patrol may, upon request, allow
the transit of commercial vessels through regulated areas when it is
safe to do so.
    If the Captain of the Port determines that the regulated area need
not be enforced for the full duration stated in this notice, a
Broadcast Notice to Mariners may be used to grant general permission to
enter the regulated area.

    Dated: September 23, 2021.
Taylor Q. Lam,
Captain, U.S. Coast Guard, Captain of the Port, Sector San Francisco.
[FR Doc. 2021-21251 Filed 9-29-21; 8:45 am]
BILLING CODE 9110-04-P