Quantifying Uncontrolled Landfill Gas Emissions from Two Florida ...

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Table 3-41. Total Mercury Concentrations Measured at Site #2 during the October 2007 Field Campaign Tube # Spike Recovery (%) Conc (µg/m3) Date 1 0.53 10/23/2007 2 0.42 10/23/2007 3 0.11 10/23/2007 CCV 106 Average=0.35 Total mercury concentrations in the landfill gas at Site #2 ranged from 0.11 to 0.53 µg/m 3 , with an average of 0.35 µg/m 3 for all of the samples. Continuous calibration verification (CCV) recoveries were 106%. 3.3.2 Gas Sampling Results Table 3-42 presents the results of the gas composition data collected at Sites #1 and #2 with the Landtec GEM 2000+ landfill gas monitor. Gas flowrates were measured using an Airfoil pitot probe with the Shortridge ADM-870 Airdata Multimeter to determine gas velocities. Table 3-42. Landfill Gas Composition Data Collected at Sites #1 and #2 during the October 2007 Field Campaign Site #1 Site #2 Duct Diameter (inches) 11 9 Area (square feet) 0.66 0.44 Gas Velocity (feet/minute) 2880 1679 Gas Flow Rate (CFM) 1901 742 Methane (%) 47.4 36.5 Carbon Dioxide (%) 36.2 34.8 Oxygen (%) 2.6 2.4 N2 Balance (%) 13.7 26.2 Hydrogen Sulfide (ppmv) 83 Invalid Data Carbon Monoxide (ppmv) 0 to 3 0 Gas sampling results from the landfill gas monitor were consistent with readings taken from other landfills of similar size and age. The Landtec landfill gas monitor was calibrated using a gas cylinder containing a mixture of 50-percent methane and 35-percent carbon dioxide in a balance of nitrogen. The landfill gas monitor has a manufacturer’s specified accuracy of ±3 percent for methane and carbon dioxide, and an accuracy of ±1 percent for oxygen. A small amount of carbon monoxide was detected at Site #1 possibly due to a small fire present in the landfill. Carbon monoxide was not detected at Site #2. Hydrogen sulfide was detected at 3-41
Site #1 with a level of 83 ppmv. The hydrogen sulfide levels at Site #2 were above the range of the instrument which had a range of 0 to 200 ppmv. The high levels of hydrogen sulfide at Site #2 may have been due to a large amount of construction and demolition debris disposed in the landfill and the conversion of sulfate to sulfide from gypsum in wallboard. 3-42
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Quantifying Uncontrolled Landfill G
Page 3 and 4:
Foreword The U.S. Environmental Pro
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3.1.3 Total Site Methane Emissions
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List of Tables Table 1-1. Target Co
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Table 3-28. Calculated Methane Flux
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Table C-6. Methane Concentrations (
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List of Figures Figure 1-1. Map of
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Executive Summary Waste decompositi
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instrument (IMACC, Inc.). Figures 1
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Figure 1-3. Scanning Boreal GasFind
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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 and 40: methane concentrations measured alo
Page 41 and 42: Figure 3-3 Summary of ORS measureme
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 57 and 58: Table 3-17. Calculated Methane Flux
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: 3.3 Gas and Mercury Sampling Result
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
Page 91 and 92: Site #1 5.4 Site #2 77.9 Completene
Page 95 and 96: U.S. Environmental Protection Agenc
Page 97 and 98: d f e c b PDCs Y X a 2 12( y)( z) (
Page 99 and 100: When the VRPM configuration consist
Page 103 and 104: Table B-3. Distance, and Horizontal
Page 105 and 106: Table B-7. Distance, and Horizontal
Page 107 and 108: APPENDIX C Path-Averaged Methane Co
Page 109 and 110: Table C-3. Methane Concentrations (
Page 117 and 118: Table C-11. Methane Concentrations
Page 127 and 128:
Table C-23. Methane Concentrations
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