Current through Register 2024 Notice Reg. No. 38, September 20, 2024
The GHG emissions data for petroleum and natural gas
emissions sources must be quality assured as applicable and as specified in
this section. Offshore petroleum and natural gas production facilities must
adhere to the monitoring and QA/QC requirements as set forth in 30 CFR Part 250
(July 1, 2011), which is hereby incorporated by reference.
(a) Facility operators must use any of the
methods described as follows in this paragraph to conduct leak detection(s) of
equipment leaks and through-valve leakage from all source types listed in
sections 95153(i), (m), (n) and
(o) that occur during a calendar year, except
as provided in paragraph (a)(4) of this section.
(1)
Optical gas imaging
instrument. Use an optical gas imaging instrument for equipment leak
detection in accordance with 40 CFR Part 60 , subarticle A, §60.18 of the Alternative
work practice for monitoring equipment leaks, §60.18(i)(1)(i);
§60.18(i)(2)(i)
except that the monitoring frequency shall be annual using the detection
sensitivity level of 60 grams per hour as stated in 40 CFR Part 60 , subarticle
A, Table 1: Detection Sensitivity Levels; §60.18(i)(2)(ii) and
(iii) except the gas chosen shall be methane,
and §60.18(i)(2)(iv) and
(v); §60.18(i)(3);
§60.18(i)(4)(i) and
(v); including the requirements for daily
instrument checks and distances, and excluding requirements for video records
(July 1, 2011, which is hereby incorporated by reference). Any emissions
detected by the optical gas imaging instrument is a leak unless screened with
Method 21 ( 40 CFR Part 60 , appendix A-7 (July 1, 2011), which is hereby
incorporated by reference) monitoring, in which case 10,000 ppm or greater is
designated a leak. In addition, facility operators must operate the optical gas
imaging instrument to image the source types required by this subarticle in
accordance with the instrument manufacturer's operating parameters. Unless
using methods in paragraph (a)(2) of this section, an optical gas imaging
instrument must be used for all source types that are inaccessible and cannot
be monitored without elevating the monitoring personnel more than two meters
above a support surface.
(2)
Method 21. Use the equipment leak detection methods in 40 CFR
Part 60 , appendix A-7, Method 21 (July 1, 2011). If using Method 21
monitoring, if an instrument reading of 10,000 ppm or greater is measured, a
leak is detected. Inaccessible emissions sources, as defined in 40 CFR Part 60
, are not exempt from this subarticle. Owners or operators must use alternative
leak detection devices as described in paragraph (a)(1) or (a)(2) of this
section to monitor inaccessible equipment leaks or vented emissions.
(3)
Infrared laser beam illuminated
instrument. Use an infrared laser beam illuminated instrument for
equipment leak detection. Any emissions detected by the infrared laser beam
illuminated instrument is a leak unless screened with Method 21 monitoring, in
which case 10,000 ppm or greater is designated a leak. In addition, the
facility operator must operate the infrared laser beam illuminated instrument
to detect the source types required by this subarticle in accordance with the
instrument manufacturer's operating instructions.
(4)
Optical gas imaging
instrument. An optical gas imaging instrument must be used for all
source types that are inaccessible and cannot be monitored without elevating
the monitoring personnel more than 2 meters above a support surface.
(5)
Acoustic leak detection
device. Use the acoustic leak detection device to detect through-valve
leakage. When using the acoustic leak detection device to quantify the
through-valve leakage, use the instrument manufacturer's calculation methods to
quantify the through-valve leak. When using the acoustic leak detection device,
if a leak of 3.1 scf per hour or greater is calculated, a leak is detected. In
addition, the facility operator must operate the acoustic leak detection device
to monitor the source valves required by this subarticle in accordance with the
instrument manufacturer's operating parameters. Acoustic stethoscope type
devices designed to detect through valve leakage when put in contact with the
valve body and that provide an audible leak signal but do not calculate a leak
rate can be used to identify non-leakers with subsequent measurement required
to calculate the rate if through-valve leakage is identified. Leaks are
reported if a leak rate of 3.1 scf per hour or greater is measured. In
addition, the facility operator must operate the acoustic leak detection device
to monitor the source valves required by this subarticle in accordance with the
instrument manufacturer's operating parameters.
(b) The operator must operate and calibrate
all flow meters, composition analyzers and pressure gauges used to measure
quantities reported in section
95153 according to the procedures
in section
95103(k) and the
procedures in paragraph (b) of this section. Pursuant to section
95109 of this article, the
facility operator may use an appropriate standard method published by a
consensus-based standards organization if such a method exists or use an
industry standard practice.
(c) Use
calibrated bags (also known as vent bags) only where the emissions are at
near-atmospheric pressures and below the maximum temperature specified by the
vent bag manufacturer such that the vent bag is safe to handle. The bag opening
must be of sufficient size that the entire emission can be tightly encompassed
for measurement till the bag is completely filled.
(1) Hold the bag in place enclosing the
emissions source to capture the entire emissions and record the time required
for completely filling the bag. If the bag inflates in less than one second,
assume one second inflation time.
(2) Perform three measurements of the time
required to fill the bag, report the emissions as the average of the three
readings.
(3) Estimate natural gas
volumetric emissions at standard conditions using calculations in section
95153(r).
(4) Estimate CH4 and
CO2 volumetric and mass emissions from volumetric
natural gas emissions using the calculations in sections
95153(s) and
(t).
(d) Use a high volume sampler to measure
emissions within the capacity of the instrument.
(1) A technician following manufacturer
instructions shall conduct measurements, including equipment manufacturer's
operating procedures and measurement methodologies relevant to using a high
volume sampler, including positioning the instrument for complete capture of
the equipment leak without creating backpressure on the source.
(2) If the high volume sampler, along with
all attachments available from the manufacturer, is not able to capture all the
emissions from the source then use anti-static wraps or other aids to capture
all emissions without violating operating requirements as provided in the
instrument manufacturer's manual.
(3) Estimate natural gas volumetric emissions
at standard conditions using calculations in section
95153(r).
Estimate CH4 and CO2 volumetric
and mass emissions from volumetric natural gas emissions using the calculations
in sections
95153(s) and
(t).
(4) Calibrate the instrument at 2.5 percent
methane with 97.5 percent air and 100 percent CH4 by
using calibrated gas samples by following manufacturer's instructions for
calibration.
(e)
Peng-Robinson Equation of State means the equation of state defined by Equation
38 of this section.
Click
here to view image
Eq. 38)
Where:
p = Absolute pressure.
R = Universal gas constant
T = Absolute temperature.
Vm = Molar volume.
Click
here to view image
Where:
[OMEGA] = Acentric factor of the species.
Tc = Critical
temperature.
Pc = Critical
pressure.
1. New
section filed 12-14-2011; operative 1-1-2012 pursuant to Government Code
section
11343.4
(Register 2011, No. 50).
2. Repealer and new section filed
12-19-2012; operative 1-1-2013 pursuant to Government Code section
11343.4
(Register 2012, No. 51).
3. Amendment of subsection (a) and repealer
of subsections (f)-(f)(4)(D) filed 12-31-2013; operative 1-1-2014 pursuant to
Government Code section
11343.4(b)(3)
(Register 2014, No. 1).
Note: Authority cited: Sections
38510,
38530,
39600,
39601,
39607,
39607.4
and
41511,
Health and Safety Code. Reference: Sections
38530,
39600
and
41511,
Health and Safety Code.
