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{longname} Q389. Within e-GGRT, how would a landfill handle multiple destruction devices including a portion of the gas sent off-site for destruction? Is there a way to add multiple on-site destruction devices for a gas system? {longname} |
A389.
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e-GGRT
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does
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not
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collect
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data
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for
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individual
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destruction
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devices.
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e-GGRT
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does
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ask
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if
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destruction
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occurs
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at
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the
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facility,
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off-site,
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or
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both.
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All
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reporting
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in
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e-GGRT
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for
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landfills
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is
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done
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at
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the
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facility
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level.
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The
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following
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is
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provided
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to
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assist
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in
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performing
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the
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calculations
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and
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reporting
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certain
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elements
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when
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several
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destruction
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devices
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are
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used
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routinely.
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e
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-GGRT
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provides
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a
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means
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to
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indicate
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if
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a
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back-up
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destruction
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device
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is
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used;
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this
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is
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not
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what
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is
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being
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considered
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here
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as
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multiple
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destruction
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devices.
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Two
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basic
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scenarios
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are
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considered:
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1)
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flow
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and
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methane
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content
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are
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measured
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at
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a
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single
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central
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location
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and
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the
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gas
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is
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then
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piped
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to
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different
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destruction
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devices
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(either
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all
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on-site
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or
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on-site
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and
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off-site),
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but
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the
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flow
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rate
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per
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device
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is
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not
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measured;
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2)
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flow
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and
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methane
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content
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are
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measured
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separately
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for
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each
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on-site
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destruction
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device
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and,
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if
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applicable,
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gas
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sent
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off-site
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for
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destruction.
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Further
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information
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can
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be
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found
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via
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the
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e-GGRT
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Help
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link
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in
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the
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left-hand
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margin
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of
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e-GGRT.
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Go
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to
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Using
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Subpart
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HH
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Calculation
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Spreadsheets
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and
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then
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to
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Using
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the
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Equation
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HH-6,
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HH-7,
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and
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HH-8
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Calculation
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Spreadsheet
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.
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Scenario
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1,
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Central
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measurement
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location.
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Determine
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single
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value
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of
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R
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directly
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from
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measurement
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data
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using
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Equation
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HH-4.
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Determine
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single
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value
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for
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DE
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using
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the
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average
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destruction
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efficiency
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of
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all
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destruction
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devices.
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Determine
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f_Dest
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as
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the
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average
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annual
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hours
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for
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which
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the
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routinely
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used
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destruction
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devices
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were
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operated
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divided
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by
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the
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hours
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the
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collection
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system
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operated
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(presumably
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8760
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hour);
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see
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equation
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below.
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Determine
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single
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value
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for
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CE
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using
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Table
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HH-3
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considering
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the
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entire
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landfill
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facility.
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Determine
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a
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single
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value
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of
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f_Rec
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based
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on
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the
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annual
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operating
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hours
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of
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the
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collection
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system.
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Equations
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HH-5
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through
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HH-8
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can
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be
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used
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directly
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given
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the
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parameters
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determined
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above.
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Other
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e-GGRT
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reporting
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parameters
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(annual
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volume
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of
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gas,
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annual
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average
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methane
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concentration
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and
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number
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of
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days/week
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missing
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data
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procedure
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were
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used)
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are
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straight
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forward
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under
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this
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scenario.
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Scenario 2, Measurement at different locations.
Determine a value of R using Equation HH-4 for each destruction device (monitoring location).
Determine a value of DE for each destruction device
Determine a value of f_Dest for each destruction device based on the annual hours for which the specific destruction device was operating divided by the number of hours flow was sent to the destruction device (or the annual hours the collection system operated that is associated with that destruction device)
Determine single value for CE using Table HH-3 considering the entire landfill facility.
If separate gas collection systems are operated for different destruction devices, determine a value of f_Rec for each destruction device-specific gas collection system; otherwise, determine a single value of f_Rec based on the annual operating hours of the collection system.
Calculations for Equation HH-5 are not dependent on destruction devices; the equations below can be used to determine the reporting quantities for Equations HH-6 through HH-8.
Report annual volume of gas as the cumulative volume of gas collected across all measurement locations.
Report the annual average CH4 concentration as the direct arithmetic average of the measured concentrations across all measurement locations (do not use a flow weighted average concentration).
Report the missing data times as the cumulative number of instances that missing data procedures were used across all measurement locations. [Note that currently the system only allows you to report missing concentration data on a daily or weekly basis. We will be modifying the system to allow an entry for both daily and weekly in the case that CH4 concentration is monitored daily for certain destruction devices and weekly for others (or for gas sent off-site).]
Calculate CH4 generation and CH4 emissions using measured CH4 recovery and estimated gas collection efficiency and Equations HH-7 and HH-8 of section 98.343(c)(3)(ii).
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{show-to:group=confluence-Users} {info} Source: This question and answer was derived from a Legacy FAQ, revised by R. Schmeltz, 2/11/2013 Approval / Publishing History: Version 2, approved by L. Grogan-McCulloch, 2/13/2013 Expiration: none Relevant Subparts: Subpart HH {info}{center}{_}History Panel For Internal Use - Not Visible to the Public{_}{center}{show-to} |
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