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Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 53, Subpt. B, Tbl. B-1 Table B-1 to Subpart B of Part 53—Performance Limit Specifications for Automated Methods

Current as of January 02, 2025 | Updated by Findlaw Staff

TABLE B-1 TO SUBPART B OF PART 53—PERFORMANCE LIMIT SPECIFICATIONS FOR AUTOMATED METHODS

Performance parameter

Units 1

SO2

O3

CO

NO2

Definitions and test

Std. range 3

Lower range 23

Std. range 3

Lower range 23

Std. range 3

Lower range 23

(Std. range)

procedures

1. Range

ppm

0-0.5

<0.5

0-0.5

<0.5

0-50

<50

0-0.5

Sec. 53.23(a)

2. Noise

ppm

0.001

0.0005

0.0025

0.001

0.2

0.1

0.005

Sec. 53.23(b)

3. Lower detectable limit

ppm

0.002

0.001

0.005

0.002

0.4

0.2

0.010

Sec. 53.23(c)

4. Interference equivalent

Each interferent

ppm

±0.005

4 ±0.005

±0.005

±0.005

±1.0

±0.5

±0.02

Sec. 53.23(d)

Total, all interferents

ppm

-

-

-

-

-

-

0.04

Sec. 53.23(d)

5. Zero drift, 12 and 24 hour

ppm

±0.004

±0.002

±0.004

±0.002

±0.5

±0.3

±0.02

Sec. 53.23(e)

6. Span drift, 24 hour

20% of upper range limit

Percent

-

-

-

-

-

-

±20.0

Sec. 53.23(e)

80% of upper range limit

Percent

±3.0

±3.0

±3.0

±3.0

±2.0

±2.0

±5.0

Sec. 53.23(e)

7. Lag time

Minutes

2

2

2

2

2.0

2.0

20

Sec. 53.23(e)

8. Rise time

Minutes

2

2

2

2

2.0

2.0

15

Sec. 53.23(e)

9. Fall time

Minutes

2

2

2

2

2.0

2.0

15

Sec. 53.23(e)

10. Precision

20% of upper range limit

-

-

-

-

-

-

Sec. 53.23(e)

Percent 5

2

2

2

2

1.0

1.0

4

Sec. 53.23(e)

80% of upper range limit

-

-

-

-

-

-

Sec. 53.23(e)

Percent 5

2

2

2

2

1.0

1.0

6

Sec. 53.23(e)

Sec. 53.23(e)

1 To convert from parts per million (ppm) to μg/m3 at 25 °C and 760 mm Hg, multiply by M/0.02447, where M is the molecular weight of the gas. Percent means percent of the upper measurement range limit.

2 Tests for interference equivalent and lag time do not need to be repeated for any lower range provided the test for the standard range shows that the lower range specification (if applicable) is met for each of these test parameters.

3 For candidate analyzers having automatic or adaptive time constants or smoothing filters, describe their functional nature, and describe and conduct suitable tests to demonstrate their function aspects and verify that performances for calibration, noise, lag, rise, fall times, and precision are within specifications under all applicable conditions. For candidate analyzers with operator-selectable time constants or smoothing filters, conduct calibration, noise, lag, rise, fall times, and precision tests at the highest and lowest settings that are to be included in the FRM or FEM designation.

4 For nitric oxide interference for the SO2 UVF method, interference equivalent is ±0.0003 ppm for the lower range.

5 Standard deviation expressed as percent of the URL.

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Cite this article: FindLaw.com - Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 53, Subpt. B, Tbl. B-1 Table B-1 to Subpart B of Part 53—Performance Limit Specifications for Automated Methods - last updated January 02, 2025 | https://codes.findlaw.com/cfr/title-40-protection-of-environment/cfr-pt-40-53-subpt-b-tbl-b-1/

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