Quantifying Uncontrolled Landfill Gas Emissions from Two Florida ...

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Table 3-36. Total Mercury Sample Concentrations from Site #2 Sample / Well Location Total Mercury Gas Concentration (ng/m 3 ) Spike Recovery (%) Gas Sample 1 36 NA Gas Sample 2 47 NA Gas Sample 3 47 NA Lab Spike NA 89.9 Lab Spike Duplicate NA 97.6 3.2.6 Dimethyl Mercury Measurements Dimethyl mercury concentrations in the landfill gas at Site #2 ranged from 0.69 to 9.19 ng/m 3 with an average of 5.66 ng/m 3 . Spike recoveries for the dimethyl mercury traps were 1.9 percent. Un-sampled spike traps had recoveries from 87.4 to 89.9 percent with an average of 88.7 percent. Recoveries for the spiked/sampled traps were significantly lower than the acceptance criteria of 50 to 150 percent. This is possibly due to the presence of an unknown interfering compound either destroying or masking the detection of the dimethyl mercury. For this reason, all of the dimethyl mercury results from this campaign must be labeled as suspect. Sampling was performed at approximately 10 times the necessary volume to collect a valid sample. Table 3-37 presents the dimethyl mercury concentration data from Site #2. Table 3-37. Dimethyl Mercury Sample Concentrations from Site #2 Sample / Well Location Dimethyl Mercury Gas Concentration( ng/m 3 ) Spike Recovery (%) Gas Sample 1 7.09 NA Gas Sample 2 0.69 NA Gas Sample 3 9.19 NA Spike Sample(front/back) NA 1.9 2nd Source Standards (1490 ng/L) NA 87.4 2nd Source Standards (1000 ng/L) NA 89.9 3.2.7 Monomethyl Mercury Measurements Monomethyl mercury concentrations in the landfill gas at Site #2 ranged from 0.06 to 0.31 ng/m 3 with an average of 0.16 ng/m 3 . The matrix spike recovery for the monomethyl sample was 62.6 percent. Spike recoveries for un-sampled impinger solution ranged from 91 to 102 percent with an average of 97 percent. The lower recoveries may have been due to a preservation issue with the shipping or possible matrix interference as seen in the matrix spike. Table 3-38 presents the monomethyl mercury concentration and QA/QC data from Site #2. 3-37
Table 3-38. Monomethyl Mercury Concentrations (ng/m 3 ) from Site #2 Sample / Well Location Monomethyl Mercury Gas Concentration (ng/m 3 ) Spike Recovery (%) Gas Sample 1 0.12 NA Gas Sample 2 0.06 NA Gas Sample 3 0.31 NA Spike Sample NA 62.6 Analytical Spike NA 90.9 Analytical Spike Duplicate NA 102.4 3.2.8 Elemental Mercury Measurements Lumex elemental mercury continuous sampling concentrations from Site #2 ranged from 22 to 64 ng/m 3 with an average of 47±17 ng/m 3 . These samples were collected during a 4 hour period on 2/23/2007. The sampling with the Lumex was also performed in conjunction with the total mercury samples at this site. 3.2.9 Calculation of NMOC Fluxes The emissions flux value of each compound presented in Table 3-34 was estimated using the method described in Section 1.7 of this document. The net measured methane flux values from each landfill cell were used to estimate the emissions flux value of each compound. In order to perform this calculation, the estimated methane emission values presented in Table 3-33 were used (5,950 kg/day for the control cell and 1,100 kg/day for the bioreactor cell). Tables 3-39 presents the estimated flux of each compound (in units of grams per day) from the control and bioreactor cells of Site #2. 3-38
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Quantifying Uncontrolled Landfill G
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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
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.
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Page 37 and 38: was aligned on the mirror targets i
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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: Table 3-34. Results for C1 to C6 an
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
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
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Table C-17. Methane Concentrations
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