Quantifying Uncontrolled Landfill Gas Emissions from Two Florida ...

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3.1.2 Bioreactor Cell 3.1.2.1 February 22 ORS measurements were collected in the bioreactor cell during the morning and early afternoon of February 22. A schematic of the ORS measurement configuration from this cell can be found in Figure 2-3. Figure 3-3 presents a summary of the actual measurement configurations used in the cell, as well as the measurement results. The figure depicts the average calculated methane flux values along each VRPM measurement plane. The blue arrow depicts the prevailing wind values during the time of the measurements. The figure shows that the prevailing winds were from the northwest during the time of the measurements. Based on the prevailing wind direction, the northern and western VRPM planes are located upwind of the actual landfill cell, and the VRPM planes located along the southern and eastern boundaries of the cell are downwind of the landfill cell. By convention of the measurement method, the sum of the flux values from measurement planes located upwind of the landfill cell is subtracted from the sum of the flux values from the downwind measurement planes to yield emissions from the cell of interest. Flux values measured along the northern and western upwind VRPM planes represent methane emissions from the northern and western slopes of the cell, respectively. The methane flux values measured along the northern, eastern, southern, and western VRPM measurement planes were 15, 13, 9.1, and 0.76 grams per second, respectively. The difference between the sum of the fluxes measured along the southern and eastern planes (22 g/s) and the northern and western planes (16 g/s), 6.0 grams per second, represents the calculated methane flux value from the top of the landfill cell (defined as the flat surface area where instrumentation was deployed). The sum of the flux values measured along the northern and western planes, 16 grams per second, represents the calculated methane flux value from the northern and western slopes of the landfill cell. 3-5
Figure 3-3 Summary of ORS measurements conducted on February 22 in the bioreactor cell of Site #1. Tables 3-4, 3-5, 3-6, and 3-7 present the calculated methane flux, measurement time, prevailing wind speed, and prevailing wind direction during the time of the VRPM measurements along the northern, eastern, southern, and western VRPM configurations, respectively. 3-6
Page 1 and 2: Quantifying Uncontrolled Landfill G
Page 3 and 4: Foreword The U.S. Environmental Pro
Page 5 and 6: 3.1.3 Total Site Methane Emissions
Page 7 and 8: List of Tables Table 1-1. Target Co
Page 9 and 10: Table 3-28. Calculated Methane Flux
Page 11 and 12: Table C-6. Methane Concentrations (
Page 13 and 14: List of Figures Figure 1-1. Map of
Page 15 and 16: Executive Summary Waste decompositi
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Page 19 and 20: instrument (IMACC, Inc.). Figures 1
Page 21 and 22: Figure 1-3. Scanning Boreal GasFind
Page 23 and 24: wind direction data are collected n
Page 25 and 26: adsorption spectrometer. The analyz
Page 27 and 28: Table 1-2. Schedule of Work Perform
Page 29 and 30: Figure 2-2. Detail of measurement c
Page 31 and 32: corners of the cell, respectively.
Page 33 and 34: 2.2.3 Background Measurements Backg
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Page 37 and 38: was aligned on the mirror targets i
Page 39: methane concentrations measured alo
Page 43 and 44: Table 3-5. Calculated methane flux
Page 45 and 46: Table 3-7. Calculated methane flux
Page 47 and 48: cell to the base. The following equ
Page 49 and 50: Table 3-9. Results of TO-15 analysi
Page 51 and 52: Table 3-10. Results of C1 to C6 and
Page 53 and 54: Table 3-14. Monomethyl Mercury Conc
Page 55 and 56: 3.2 Landfill Site #2 3.2.1 Control
Page 63 and 64: 3.2.2 Bioreactor Cell 3.2.2.1 Febru
Page 69 and 70: Based on the calculations presented
Page 71 and 72: Table 3-34. Results for C1 to C6 an
Page 73 and 74: Table 3-38. Monomethyl Mercury Conc
Page 75 and 76: 3.3 Gas and Mercury Sampling Result
Page 77 and 78: Site #1 with a level of 83 ppmv. Th
Page 79 and 80: The surveys also found significant
Page 81 and 82: Monomethyl mercury concentrations i
Page 83 and 84: 5.1 Equipment Calibration Chapter 5
Page 85 and 86: The R 2 value was used to assess th
Page 87 and 88: the measured path-integrated methan
Page 89 and 90: 5.2.7 DQI Check of Total Mercury Sa
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Site #1 5.4 Site #2 77.9 Completene
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U.S. Environmental Protection Agenc
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d f e c b PDCs Y X a 2 12( y)( z) (
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When the VRPM configuration consist
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Table B-3. Distance, and Horizontal
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Table B-7. Distance, and Horizontal
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APPENDIX C Path-Averaged Methane Co
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Table C-3. Methane Concentrations (
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Table C-11. Methane Concentrations
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