Quantifying Uncontrolled Landfill Gas Emissions from Two Florida ...

Figure 3-5 Summary of ORS measurements conducted on Feb. 25 in the control cell of
Site #2.
The methane flux values measured along the northern, eastern, southern, and western VRPM
measurement planes were 13, 2.3, 13, and 3.3 grams per second, respectively. The difference
between the sum of the fluxes measured along the northern and eastern planes (15 g/s) and the
southern and western planes (16 g/s), is a negative value close to 0, and is within the uncertainty
range of the measurement method. Based on this, the estimated methane flux value from the top
of the landfill cell is negligible.
The sum of the flux values measured along the southern and western planes, 16 grams per
second, represents the calculated methane flux value from the southern and western slopes of the
landfill cell.
Tables 3-20, 3-21, 3-22, and 3-23 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.
3-25