Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a)
Hydrocarbon Detector Specifications: Any instrument used for
the measurement of methane must be a gas detector or other equivalent
instrument approved by the Executive Officer that meets the calibration,
specifications, and performance criteria of EPA Reference Method 21,
Determination of Volatile Organic Compound Leaks, 40 CFR Part 60 , Appendix A
(as last amended 65 Fed.Reg. 61744 (October 17, 2000)), which is incorporated
by reference herein, except for the following:
(1) "Methane" replaces all references to
volatile organic compounds (VOC).
(2) The calibration gas shall be
methane.
(b)
Determination of Landfill Gas Heat Input Capacity: The
landfill gas heat input capacity must be determined pursuant to sections
95471(b)(1),
95471(b)(2), or
95471(b)(3), as
applicable:
(1)
MSW Landfills without
Carbon Adsorption or Passive Venting Systems: The heat input capacity
must be calculated using the procedure as specified in Appendix I. The
Executive Officer may request additional information as may be necessary to
verify the heat input capacity from the MSW landfill. Site-specific data may be
substituted when available.
(2)
MSW Landfills with Carbon Adsorption Systems: The landfill gas
heat capacity must be determined by measuring the actual total landfill gas
flow rate, in standard cubic feet per minute (scfm), using a flow meter or
other flow measuring device such as a standard pitot tube and methane
concentration (percent by volume) using a hydrocarbon detector meeting the
requirements of 95471(a). The total landfill gas flow rate must be multiplied
by the methane concentration and then multiplied by the gross heating value
(GHV) of methane of 1,012 Btu/scf to determine the landfill gas heat input
capacity.
(3)
MSW Landfills
with Passive Venting Systems: The landfill gas heat input capacity
must be determined pursuant to both of the following and is the higher of those
determined values:
(A) Section
95471(b)(1);
and
(B) The owner or operator must
measure actual landfill gas flow rates (in units of scfm) by using a flow
measuring device such as a standard pitot tube and methane concentration
(percent by volume) using a hydrocarbon detector meeting the requirements of
95471(a) from each venting pipe that is within the waste mass. Each gas flow
rate must then be multiplied by its corresponding methane concentration to
obtain the individual methane flow rate. The individual methane flow rates must
be added together and then multiplied by the GHV of methane of 1,012 Btu/scf to
determine the landfill gas heat input capacity.
(c)
Surface Emissions Monitoring
Procedures: The owner or operator must measure the landfill surface
concentration of methane using a hydrocarbon detector meeting the requirements
of section
95471(a). The
landfill surface must be inspected using the following procedures:
(1)
Monitoring Area: The
entire landfill surface must be divided into individually identified 50,000
square foot grids. The grids must be used for both instantaneous and integrated
surface emissions monitoring.
(A) Testing
must be performed by holding the hydrocarbon detector's probe within 3 inches
of the landfill surface while traversing the grid.
(B) The walking pattern must be no more than
a 25-foot spacing interval and must traverse each monitoring grid.
1. If the owner or operator has no
exceedances of the limits specified in section
95465 after any four consecutive
quarterly monitoring periods, the walking pattern spacing may be increased to
100-foot intervals. The owner or operator must return to a 25-foot spacing
interval upon any exceedances of the limits specified in section
95465 that cannot be remediated
within 10 calendar days or upon any exceedances detected during a compliance
inspection.
2. If an owner or
operator of a MSW landfill can demonstrate that in the past three years before
the effective date of this subarticle that there were no measured exceedances
of the limit specified in section
95465(a)(1) by
annual or quarterly monitoring, the owner or operator may increase the walking
pattern spacing to 100-foot intervals. The owner or operator must return to a
25-foot spacing interval upon any exceedances of the limits specified in
section 95465 that cannot be remediated
within 10 calendar days or upon any exceedances detected during a compliance
inspection.
(C) Surface
testing must be terminated when the average wind speed exceeds five miles per
hour or the instantaneous wind speed exceeds 10 miles per hour. The Executive
Officer may approve alternatives to this wind speed surface testing termination
for MSW landfills consistently having measured winds in excess of these
specified limits. Average wind speed must be determined on a 15-minute average
using an on-site anemometer with a continuous recorder for the entire duration
of the monitoring event.
(D)
Surface emissions testing must be conducted only when there has been no
measurable precipitation in the preceding 72 hours.
(2)
Instantaneous Surface Emissions
Monitoring Procedures.(A) The owner
or operator must record any instantaneous surface readings of methane 200 ppmv
or greater, other than non-repeatable, momentary readings.
(B) Surface areas of the MSW landfill that
exceed a methane concentration limit of 500 ppmv must be marked and remediated
pursuant to section
95469(a)(1).
(C) The wind speed must be recorded during
the sampling period.
(D) The
landfill surface areas with cover penetrations, distressed vegetation, cracks
or seeps must also be inspected visually and with a hydrocarbon
detector.
(3)
Integrated Surface Emissions Monitoring Procedures.
(A) Integrated surface readings must be
recorded and then averaged for each grid.
(B) Individual monitoring grids that exceed
an average methane concentration of 25 ppmv must be identified and remediated
pursuant to section
95469(a)(2).
(C) The wind speed must be recorded during
the sampling period.
(d)
Gas Collection and Control System
Leak Inspection Procedures. Leaks must be measured using a hydrocarbon
detector meeting the requirements of 95471(a).
(e)
Determination of Expected Gas
Generation Flow Rate. The expected gas generation flow rate must be
determined as prescribed in the 2006 Intergovernmental Panel on Climate Change
(IPCC) Guidelines for National Greenhouse Gas Inventories, Chapter 3, which is
incorporated by reference herein, using a recovery rate of 75
percent.
(f)
Control Device
Destruction Efficiency Determination. The following methods of
analysis must be used to determine the efficiency of the control device in
reducing methane:
(1)
Enclosed
Combustors: One of the following test methods, all of which are
incorporated by reference herein (and all as promulgated in 40 CFR, Part 60 ,
Appendix A, as last amended 65 Fed.Reg. 61744 (October 17, 2000) at the pages
cited below must be used to determine the efficiency of the control device in
reducing methane by at least 99 percent, or in reducing the outlet methane
concentration for lean burn engines to less than 3,000 ppmv, dry basis,
corrected to 15 percent oxygen:
U.S. EPA Reference Method 18, Measurement of Gaseous
Organic Compound Emissions By Gas Chromatography (65 Fed.Reg. at 62007);
U.S. EPA Reference Method 25, Determination of Total
Gaseous Nonmethane Organic Emissions as Carbon (65 Fed.Reg. at 62044);
U.S. EPA Reference Method 25A, Determination of Total
Gaseous Organic Concentration Using a Flame Ionization Analyzer (65 Fed.Reg. at
62062); or
U.S. EPA Reference Method 25C, Determination of
Nonmethane Organic Compounds in Landfill Gases (65 Fed.Reg. at 62066).
The following equation must be used to calculate
destruction efficiency:
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(2)
Open Flares: Open flares
must meet the requirements of
40 CFR §
60.18 (as last amended 73 Fed.Reg. 78209
(December 22, 2008).
(g)
Determination of Gauge Pressure. Gauge pressure must be
determined using a hand-held manometer, magnahelic gauge, or other pressure
measuring device approved by the Executive Officer. The device must be
calibrated and operated in accordance with the manufacture's
specifications.
(h)
Alternative Test Methods. Alternative test methods may be used
provided that they are approved in writing by the Executive Officer.
1. New
section filed 6-17-2010; operative 6-17-2010 pursuant to Government Code
section
11343.4
(Register 2010, No. 25).
Note: Authority cited: Sections
38501,
38510,
38560,
38560.5,
38580,
39600
and
39601,
Health and Safety Code. Reference: Sections
38501,
38505,
38510,
38550,
38551,
38560,
38560.5,
39003,
39500,
39600
and
39601,
Health and Safety Code.
