Quantifying Uncontrolled Landfill Gas Emissions from Two Florida ...

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1.7 Calculation of NMOC Fluxes As described previously, concentrations of NMOC were determined from samples of landfill gas collected at the gas header pipe at each site. The samples were analyzed for the target compounds listed in Table 1-1. Upon completion of the sample analysis, the concentration of the detected target compounds (obtained from the EPA Method TO-15 data) was ratioed to the concentration of the methane in the landfill gas samples (obtained from the EPA Method 25-C data). This ratio was used with the methane emissions data collected with the ORS instrumentation to calculate an estimated emissions flux value, from the top of the landfill cell for each of the target VOC compounds, using the following formula: Where Ft = [(Ct * Fo)/Co] [Mt/Mo] (1) Ft is the flux of the target compound (VOC) Ct is the measured concentration of the target compound Fo is the calculated methane flux Co is the measured methane concentration Mt is the molecular weight of the target compound Mo is the molecular weight of methane 1.8 Field Schedule Two field campaigns were completed for this study at two separate sites during February and October 2007. During the February 2007 field campaign, methane concentration data were collected using the ORS instrumentation, and gas and mercury samples were collected near the landfill header pipes. Due to questionable gas and mercury data from the February 2007 campaign, additional gas and mercury samples were collected during a second campaign conducted in October 2007. Table 1-2 presents the schedule of work that was performed. 1-9
Table 1-2. Schedule of Work Performed at the Sites Day Site Detail of Work Performed Sunday, February 18 Site #1 Travel to Site #1 Monday, February 19 Site #1 AM-Site Orientation PM-Deployment of ORS Equipment at Control Cell; gas and mercury sampling Tuesday, February 20 Site #1 ORS Data Collected at Control Cell; gas and mercury sampling Wednesday, February 21 Site #1 AM- Deployment of ORS Equipment at Bioreactor Cell PM- ORS Data Collected at Bioreactor Cell; gas and mercury sampling Thursday, February 22 Site #1 AM- ORS Data Collected at Bioreactor Cell PM- Travel to Site #2 Friday, February 23 Site #2 AM- Site Orientation and Deployment of ORS Equipment at Bioreactor Cell PM- ORS Data Collected at Bioreactor Cell; gas and mercury sampling Saturday, February 24 Site #2 AM- ORS Data Collected at Bioreactor Cell PM- Deployment of ORS Equipment and ORS Data Collected at Control Cell; gas and mercury sampling Sunday, February 25 Site #2 ORS Data Collected at Control Cell; gas and mercury sampling Sunday, October 21 Site #1 Travel to Site #1 Monday, October 22 Site #1 Perform gas sampling / Travel to site #2 Tuesday, October 23 Site #2 Perform gas and mercury sampling /. Travel to site #1 Wednesday, October 24 Site #1 Perform gas and mercury sampling / Travel back to RTP 1-10
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: adsorption spectrometer. The analyz
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 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
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Site #1 with a level of 83 ppmv. Th
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The surveys also found significant
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Monomethyl mercury concentrations i
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5.1 Equipment Calibration Chapter 5
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The R 2 value was used to assess th
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the measured path-integrated methan
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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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