continuously. requirements, then hour must be h paired to measurements of WLFG,CH4. 2 Proportion of Fraction Estimated under For the purpose of the volume of Division 2.3.6 of the equation 8, average landfill gas NGER (Measurement) values for a time that is Determination using interval not greater methane measurement criteria than 1 hour must be AAA in accordance with paired to subsection (2). measurements of QLFG,b,h for the Frequency: same time interval. (a) if used in equation 8— (b) otherwise— not required. Measured at the same conditions as QLFG,b,h 3 Surface area Square Either: For the purpose of Sb of biofilter metres equation 11, the most b measured through a recent measurement surveyed site plan; of the area of the or base of biofilter is determined from used. drawing of the biofiltration system; or determined from design drawing of the biofiltration system endorsed by the biofilter design engineer or consultant. Frequency - immediately following construction, replacement or upgrade of the biofilter. 4 CAv,b,h CAv,b,h is the Parts per The concentration of Determine CAv,b,h and average million methane near the surface as the average of all concentration of biofilter must be measurements b CMax,b,h of methane measured through a undertaken during near the walkover survey of the the walkover survey. surface of biofilter. Determine CMax,b,h biofilter b. as the maximum of The survey must:
requirements, then hour h must be paired to measurements of WLFG,CH4. 2 Proportion of the volume of landfill gas that is methane Fraction Estimated under Division 2.3.6 of the NGER (Measurement) Determination using measurement criteria AAA in accordance with subsection (2). Frequency: (a) if used in equation 8— continuously. (b) otherwise— not required. Measured at the same conditions as QLFG,b,h For the purpose of equation 8, average values for a time interval not greater than 1 hour must be paired to measurements of QLFG,b,h for the same time interval. 3 Sb Surface area of biofilter b Square metres Either: measured through a surveyed site plan; or determined from drawing of the biofiltration system; or determined from design drawing of the biofiltration system endorsed by the biofilter design engineer or consultant. Frequency - immediately following construction, replacement or upgrade of the biofilter. For the purpose of equation 11, the most recent measurement of the area of the base of biofilter is used. 4 CAv,b,h and CMax,b,h CAv,b,h is the average concentration of methane near the surface of biofilter b. Parts per million The concentration of methane near the surface of biofilter b must be measured through a walkover survey of the biofilter. The survey must: Determine CAv,b,h as the average of all measurements undertaken during the walkover survey. Determine CMax,b,h as the maximum of