Quantifying Uncontrolled Landfill Gas Emissions from Two Florida ...

Based on the calculations presented in Table 3-33, the total methane emissions from Site #2 are
estimated by calculating the sum of the average of the total methane emissions from the
bioreactor and control cells, which is 7,300 kilograms per day. It should be noted that this
estimated value is extrapolated from a limited amount of flux data, and does not take into
account diurnal or seasonal trends in methane emissions.
3.2.4 Summa Canister Sampling
Summa canister samples were collected from the gas collection header pipe in triplicate at Site
#2. These samples represent a composite of LFG from the entire site. Samples were collected
upstream of the vacuum pump to minimize loses and contamination. Blanks were also collected
using a nitrogen gas stream to purge the VOST train condensers and glassware. Samples were
analyzed using Methods TO-15, 25-C, a C1 through C6 alkane hydrocarbons analysis by
GC/FID, and a permanent gases (O2, N2, CO2) analysis by GC/TCD. Results are presented in
Tables 3-33 through 3-35. TO-15 results are qualified using results from the nitrogen blank. Any
compounds reported in samples that are