Field QC Samples Sample Clauses

Field QC Samples. Field QC samples are collected to help ensure that field samples are not contaminated from exogenous sources during sample collection, and to help evaluate the precision of field sample analytical results. Field QC samples are assigned unique field identifiers and are submitted to the analytical laboratory along with the associated field samples. Three types of field QC samples are possible for the tissue sampling as described in the following sections: 1.1). If any asbestos is observed in a field blank, the FTL and/or laboratory manager will be notified and will take appropriate measures to ensure staff are employing proper sample handling techniques. In addition, a qualifier of “FB” will be added to the related field sample results in the project database to denote that the associated field blank had asbestos structures detected. One field duplicate sample will be collected of muscle from each animal (deer and elk). The tissue field duplicate should be collected as one half of the flank muscle tissue collected. One field duplicate will be collected for fish, representing the remaining fillet for one selected fish. It is the responsibility of the FTL to ensure that the field duplicates are collected at the specified frequency. The field duplicate is given a unique sample number, and field personnel will record the sample number of the associated co-located sample in the parent sample number field of the FSDS. The same station location is assigned to the field duplicate sample as the parent field sample. Field duplicates will be sent for analysis by the same method as field samples (see Section B4.1.1) and are blind to the laboratory. Field duplicate results will be compared to the original parent field sample using the Poisson ratio test using a 90% confidence interval (CI) (▇▇▇▇▇▇ 1982). Because field duplicate samples are expected to have inherent variability that is random and may be either small or large, typically, there is no quantitative requirement for the agreement of field duplicates. Rather, results are used to determine the magnitude of this variability to evaluate data usability. 1.2). If any asbestos structures are observed in an equipment rinsate, the FTL and/or laboratory manager will be notified and will take appropriate measures to ensure staff are employing proper sample handling techniques. In addition, a qualifier of “EB” will be added to the related field sample results in the project database to denote that the associated equipment ...
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Field QC Samples. 36 B5.2.1 Training/Certifications 38 B5.2.2 Modification Documentation 39
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Field QC Samples. Field QC samples are collected to help ensure that field samples are not contaminated from exogenous sources during sample collection, and to help evaluate the precision of field sample analytical results. Field QC samples are assigned unique field identifiers and are submitted to the analytical laboratory along with the associated field samples. Only one type of field QC sample will be collected as part of the duff sampling portion of this program – field duplicates. Field blanks for duff are not required for this sampling program. Field duplicate samples of duff material will be collected as part of this sampling program at a rate of 5%. The duff field duplicate should be collected at the same approximate locations as the duff sampling points as the parent sample (i.e., within 12 inches of the parent sampling points). It is the responsibility of the FTL to ensure that the field duplicate is collected. The field duplicate is given a unique sample number, and field personnel will record the sample number of the associated co-located sample in the parent sample number field of the FSDS. The same station location is assigned to the field duplicate sample as the parent field sample. Field duplicates will be sent for analysis by the same method as field samples and are blind to the laboratories (i.e., the laboratory cannot distinguish between field samples and field duplicates). Field duplicate results will be compared to the original parent field sample using the Poisson ratio test using a 90% confidence interval (CI) (▇▇▇▇▇▇ 1982). Because field duplicate samples are expected to have inherent variability that is random and may be either small or large, typically, there is no quantitative requirement for the agreement of field duplicates. Rather, results are used to determine the magnitude of this variability to evaluate data usability. Two types of field QC samples may be collected as part of the tree bark sampling portion of this program – equipment rinsates and field duplicates. Field blanks for tree bark are not required for this sampling program. Equipment rinsates are collected to evaluate potential contamination that arises to due inadequate decontamination of sampling equipment. Equipment rinsates will only be collected if non-dedicated field sampling equipment (i.e., hole saws, chisels) are utilized. Following decontamination efforts, the decontaminated equipment (i.e., hole saw, chisel) should be rinsed with clean water (e.g., store-bought drinking ...
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Related to Field QC Samples

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