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SRI/USEPA-GHG-VR-27 September 2003 The DQIs specified in Table 3-2 contain accuracy, precision, and completeness levels that must be achieved to ensure that DQOs can be met. Reconciliation of DQIs is conducted by performing independent performance checks in the field with certified reference materials and by following approved reference methods, factory calibrating the instruments prior to use, and conducting QA/QC procedures in the field to ensure that instrument installation and operation are verified. The following sections address reconciliation of each of the DQI goals. 3.2. RECONCILIATION OF DQOs AND DQIs Table 3-2 summarizes the range of measurements observed in the field and the completeness goals. Completeness is the number or percent of valid determinations actually made relative to the number or percent of determinations planned. The completeness goals for the controlled tests were to obtain electrical and thermal efficiency as well as emission rate data for three test runs conducted at each of the six different load conditions. This completeness goal was achieved. Completeness goals for the extended tests were to obtain 90 percent of 14 days of power quality, power output, fuel input, and ambient measurements. This goal was exceeded—14 complete days of valid data were collected (a total of 10 minutes of data were invalidated when the microturbine shut down momentarily). These data were useful in establishing trends in power and heat performance capability at varying ambient temperatures as discussed in Section 2. Table 3-2 also includes accuracy goals for measurement instruments. Actual measurement accuracy achieved are also reported based on instrument calibrations conducted by manufacturers, field calibrations, reasonableness checks, and/or independent performance checks with a second instrument. Table 3-3 includes the QA/QC procedures that were conducted for key measurements in addition to the procedures used to establish DQIs. The accuracy results for each measurement and their effects on the DQOs are discussed below. 3-2PDF Image | Environmental Technology Verification Report
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