TM 5-810-15
monitoring plan must be established. Applications
percent of span. The measured values have to be
have to be submitted for certification and
within 3 percent of the referenced value. Linearity
recertification tests. Quarterly reports and opacity
checks are required quarterly. These checks must
reports are also mandatory.
use dedicated low, mid and high level cal gases.
(3) The monitoring plan although not part of
Measured values must be within 5 percent of the
the GEMS specifications has several elements that
cal gas value. Average difference among three
are common to both. Monitoring plans include pre-
nonconsecutive checks with each cal gas must be
certification information, unit specific information,
less than or equal to 5 ppm for SO2 and NOx or less
schematic stack diagrams, stack and duct
than or equal to 0.5 percent of CO2 or 02.
engineering information, monitor locations, moni-
(7) Several daily adjustments are required.
toring component identification table, DAS table
Error adjustments on gas and flow monitors are
and emissions formula table.
required daily. Recalibration must then be per-
(4) Records have to be maintained for at
formed after each adjustment. A flow monitor
least three years. Record keeping includes current
interference check is necessary. This includes sam-
monitoring plan, quality plan and hourly operating
ple sensing line port pluggage and RTD/transceiver
data. Hourly data must include date, hour, unit
malfunction. An out of control period is when
operating time, integrated hourly gross unit load,
calibration error exceeds two times the calibration
operating load range and total heat input in
error limit or when flow fails interference check.
MMBtu.
Data recording must include unadjusted values and
(5) The certification tests have to be
magnitude of adjustment.
successfully executed on time. These tests include
(8) Quarterly adjustments are also required.
a 7 day calibration error test for gases and flow, a
Linearity must be checked on a quarterly basis
linearity check, cycle time/response time test,
when no adjustments are made. Leak checks are
relative accuracy test and bias test. Guidelines
required for differential pressure monitors. An out
clearly outline whether or not recertification tests
of control period is when linearity exceeds limit on
are required when changes have been made to
any test run or when a flow leak is detected.
equipment, location or the DAS.
(9) Preventive maintenance procedures must
be in writing, including equipment manufacturer*s
(6) Quality assurance and quality control
procedures must be developed into a well defined
recommendations. A schedule for the implementa-
program which includes calibration error testing
tion of these procedures has to be maintained. An
and linearity checking procedures, calibration and
inventory of spare parts is also required.
linearity adjustments, preventative maintenance
(10) A relative accuracy test audit (RATA) is
auditing procedures or relative accuracy test audit
required semi-annually unless accuracy is better
(RATA). Calibration error tests have to be per-
than 7.5 percent. The RATA has to be performed
formed on a daily basis. SO2 and NOx monitors
during a 7 day period. A minimum of 9 sets of
must be challenged by zero level and high level
reference method test data are needed. One set of
calibration gases. The measured values must be
data consists of a 3 point traverse at 0.4, 1.2 and
within 2.5 percent of the cal gas value. If the span
2.0 meters from the wall of the stack or duct. The
is less than 200 ppm then the values must be within
gas sample must be analyzed for concentrations or
5 ppm. CO2 or 02 monitors also have to be
flow using the reference methods. Calculations
challenged by zero level and high level calibration
must include determinations of the mean, standard
gases. For these monitors the measured value must
deviation, confidence coefficient and bias. A flow
be within 0.5 percent of the cal gas value. Flow
test is required.
monitors are required to zero at 20, 50 and 70
4-3
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